Merge branch 'develop' into feature/state_service_coroutines

.idea/dictionaries/bmarty.xml

@@ -24,6 +24,8 @@
       <w>pbkdf</w>
       <w>pids</w>
       <w>pkcs</w>
+      <w>previewable</w>
+      <w>previewables</w>
       <w>riotx</w>
       <w>signin</w>
       <w>signout</w>

CHANGES.md

@@ -4,30 +4,40 @@ Changes in Element 1.0.12 (2020-XX-XX)
 Features ✨:
  - Add room aliases management, and room directory visibility management in a dedicated screen (#1579, #2428)
  - Room setting: update join rules and guest access (#2442)
+ - Url preview (#481)
+ - Store encrypted file in cache and cleanup decrypted file at each app start (#2512)
+ - Emoji Keyboard (#2520)
 
 Improvements 🙌:
  - Add Setting Item to Change PIN (#2462)
  - Improve room history visibility setting UX (#1579)
 
 Bugfix 🐛:
+ - Fix cancellation of sending event (#2438)
  - Double bottomsheet effect after verify with passphrase
  - EditText cursor jumps to the start while typing fast (#2469)
+ - Show preview when sending attachment from the keyboard (#2440)
+ - Do not compress GIFs (#1616, #1254)
 
 Translations 🗣:
  -
 
 SDK API changes ⚠️:
  - StateService now exposes suspendable function instead of using MatrixCallback.
+ - RawCacheStrategy has been moved and renamed to CacheStrategy
+ - FileService: remove useless FileService.DownloadMode
 
 Build 🧱:
  - Upgrade some dependencies and Kotlin version
  - Use fragment-ktx and preference-ktx dependencies (fix lint issue KtxExtensionAvailable)
+ - Upgrade Realm dependency to 10.1.2
 
 Test:
  -
 
 Other changes:
  - Remove "Status.im" theme #2424
+ - Log HTTP requests and responses in production (level BASIC, i.e. without any private data)
 
 Changes in Element 1.0.11 (2020-11-27)
 ===================================================

gradle.properties

@@ -18,7 +18,7 @@ org.gradle.jvmargs=-Xmx2048m
 org.gradle.vfs.watch=true
 
 vector.debugPrivateData=false
-vector.httpLogLevel=NONE
+vector.httpLogLevel=BASIC
 
 # Note: to debug, you can put and uncomment the following lines in the file ~/.gradle/gradle.properties to override the value above
 #vector.debugPrivateData=true

matrix-sdk-android/build.gradle

@@ -9,7 +9,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath "io.realm:realm-gradle-plugin:10.0.0"
+        classpath "io.realm:realm-gradle-plugin:10.1.2"
     }
 }
 
@@ -63,7 +63,7 @@ android {
 
         release {
             buildConfigField "boolean", "LOG_PRIVATE_DATA", "false"
-            buildConfigField "okhttp3.logging.HttpLoggingInterceptor.Level", "OKHTTP_LOGGING_LEVEL", "okhttp3.logging.HttpLoggingInterceptor.Level.NONE"
+            buildConfigField "okhttp3.logging.HttpLoggingInterceptor.Level", "OKHTTP_LOGGING_LEVEL", "okhttp3.logging.HttpLoggingInterceptor.Level.BASIC"
         }
     }
 

matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/keysbackup/KeysBackupTest.kt

@@ -264,7 +264,7 @@ class KeysBackupTest : InstrumentedTest {
         assertNotNull(decryption)
         // - Check decryptKeyBackupData() returns stg
         val sessionData = keysBackup
-                .decryptKeyBackupData(keyBackupData!!,
+                .decryptKeyBackupData(keyBackupData,
                         session.olmInboundGroupSession!!.sessionIdentifier(),
                         cryptoTestData.roomId,
                         decryption!!)

matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/crypto/keysbackup/KeysBackupTestHelper.kt

@@ -111,7 +111,7 @@ class KeysBackupTestHelper(
         Assert.assertTrue(keysBackup.isEnabled)
 
         stateObserver.stopAndCheckStates(null)
-        return PrepareKeysBackupDataResult(megolmBackupCreationInfo, keysVersion.version!!)
+        return PrepareKeysBackupDataResult(megolmBackupCreationInfo, keysVersion.version)
     }
 
     /**

matrix-sdk-android/src/androidTest/java/org/matrix/android/sdk/internal/session/media/UrlsExtractorTest.kt

@@ -0,0 +1,108 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.session.media
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import org.amshove.kluent.shouldBeEqualTo
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.matrix.android.sdk.InstrumentedTest
+import org.matrix.android.sdk.api.session.events.model.Event
+import org.matrix.android.sdk.api.session.events.model.EventType
+import org.matrix.android.sdk.api.session.events.model.toContent
+import org.matrix.android.sdk.api.session.room.model.message.MessageTextContent
+import org.matrix.android.sdk.api.session.room.model.message.MessageType
+
+@RunWith(AndroidJUnit4::class)
+internal class UrlsExtractorTest : InstrumentedTest {
+
+    private val urlsExtractor = UrlsExtractor()
+
+    @Test
+    fun wrongEventTypeTest() {
+        createEvent(body = "https://matrix.org")
+                .copy(type = EventType.STATE_ROOM_GUEST_ACCESS)
+                .let { urlsExtractor.extract(it) }
+                .size shouldBeEqualTo 0
+    }
+
+    @Test
+    fun oneUrlTest() {
+        createEvent(body = "https://matrix.org")
+                .let { urlsExtractor.extract(it) }
+                .let { result ->
+                    result.size shouldBeEqualTo 1
+                    result[0] shouldBeEqualTo "https://matrix.org"
+                }
+    }
+
+    @Test
+    fun withoutProtocolTest() {
+        createEvent(body = "www.matrix.org")
+                .let { urlsExtractor.extract(it) }
+                .size shouldBeEqualTo 0
+    }
+
+    @Test
+    fun oneUrlWithParamTest() {
+        createEvent(body = "https://matrix.org?foo=bar")
+                .let { urlsExtractor.extract(it) }
+                .let { result ->
+                    result.size shouldBeEqualTo 1
+                    result[0] shouldBeEqualTo "https://matrix.org?foo=bar"
+                }
+    }
+
+    @Test
+    fun oneUrlWithParamsTest() {
+        createEvent(body = "https://matrix.org?foo=bar&bar=foo")
+                .let { urlsExtractor.extract(it) }
+                .let { result ->
+                    result.size shouldBeEqualTo 1
+                    result[0] shouldBeEqualTo "https://matrix.org?foo=bar&bar=foo"
+                }
+    }
+
+    @Test
+    fun oneUrlInlinedTest() {
+        createEvent(body = "Hello https://matrix.org, how are you?")
+                .let { urlsExtractor.extract(it) }
+                .let { result ->
+                    result.size shouldBeEqualTo 1
+                    result[0] shouldBeEqualTo  "https://matrix.org"
+                }
+    }
+
+    @Test
+    fun twoUrlsTest() {
+        createEvent(body = "https://matrix.org https://example.org")
+                .let { urlsExtractor.extract(it) }
+                .let { result ->
+                    result.size shouldBeEqualTo 2
+                    result[0] shouldBeEqualTo "https://matrix.org"
+                    result[1] shouldBeEqualTo "https://example.org"
+                }
+    }
+
+    private fun createEvent(body: String): Event = Event(
+            type = EventType.MESSAGE,
+            content = MessageTextContent(
+                    msgType = MessageType.MSGTYPE_TEXT,
+                    body = body
+            ).toContent()
+    )
+}

matrix-sdk-android/src/debug/java/org/matrix/android/sdk/internal/network/interceptors/FormattedJsonHttpLogger.kt

@@ -17,7 +17,6 @@
 package org.matrix.android.sdk.internal.network.interceptors
 
 import androidx.annotation.NonNull
-import org.matrix.android.sdk.BuildConfig
 import okhttp3.logging.HttpLoggingInterceptor
 import org.json.JSONArray
 import org.json.JSONException
@@ -38,31 +37,28 @@ class FormattedJsonHttpLogger : HttpLoggingInterceptor.Logger {
      */
     @Synchronized
     override fun log(@NonNull message: String) {
-        // In RELEASE there is no log, but for sure, test again BuildConfig.DEBUG
-        if (BuildConfig.DEBUG) {
-            Timber.v(message)
+        Timber.v(message)
 
-            if (message.startsWith("{")) {
-                // JSON Detected
-                try {
-                    val o = JSONObject(message)
-                    logJson(o.toString(INDENT_SPACE))
-                } catch (e: JSONException) {
-                    // Finally this is not a JSON string...
-                    Timber.e(e)
-                }
-            } else if (message.startsWith("[")) {
-                // JSON Array detected
-                try {
-                    val o = JSONArray(message)
-                    logJson(o.toString(INDENT_SPACE))
-                } catch (e: JSONException) {
-                    // Finally not JSON...
-                    Timber.e(e)
-                }
+        if (message.startsWith("{")) {
+            // JSON Detected
+            try {
+                val o = JSONObject(message)
+                logJson(o.toString(INDENT_SPACE))
+            } catch (e: JSONException) {
+                // Finally this is not a JSON string...
+                Timber.e(e)
+            }
+        } else if (message.startsWith("[")) {
+            // JSON Array detected
+            try {
+                val o = JSONArray(message)
+                logJson(o.toString(INDENT_SPACE))
+            } catch (e: JSONException) {
+                // Finally not JSON...
+                Timber.e(e)
             }
-            // Else not a json string to log
         }
+        // Else not a json string to log
     }
 
     private fun logJson(formattedJson: String) {

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/cache/CacheStrategy.kt

@@ -14,16 +14,16 @@
  * limitations under the License.
  */
 
-package org.matrix.android.sdk.api.raw
+package org.matrix.android.sdk.api.cache
 
-sealed class RawCacheStrategy {
+sealed class CacheStrategy {
     // Data is always fetched from the server
-    object NoCache : RawCacheStrategy()
+    object NoCache : CacheStrategy()
 
     // Once data is retrieved, it is stored for the provided amount of time.
     // In case of error, and if strict is set to false, the cache can be returned if available
-    data class TtlCache(val validityDurationInMillis: Long, val strict: Boolean) : RawCacheStrategy()
+    data class TtlCache(val validityDurationInMillis: Long, val strict: Boolean) : CacheStrategy()
 
     // Once retrieved, the data is stored in cache and will be always get from the cache
-    object InfiniteCache : RawCacheStrategy()
+    object InfiniteCache : CacheStrategy()
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/raw/RawService.kt

@@ -16,6 +16,8 @@
 
 package org.matrix.android.sdk.api.raw
 
+import org.matrix.android.sdk.api.cache.CacheStrategy
+
 /**
  * Useful methods to fetch raw data from the server. The access token will not be used to fetched the data
  */
@@ -23,7 +25,7 @@ interface RawService {
     /**
      * Get a URL, either from cache or from the remote server, depending on the cache strategy
      */
-    suspend fun getUrl(url: String, rawCacheStrategy: RawCacheStrategy): String
+    suspend fun getUrl(url: String, cacheStrategy: CacheStrategy): String
 
     /**
      * Specific case for the well-known file. Cache validity is 8 hours

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/Session.kt

@@ -35,6 +35,7 @@ import org.matrix.android.sdk.api.session.group.GroupService
 import org.matrix.android.sdk.api.session.homeserver.HomeServerCapabilitiesService
 import org.matrix.android.sdk.api.session.identity.IdentityService
 import org.matrix.android.sdk.api.session.integrationmanager.IntegrationManagerService
+import org.matrix.android.sdk.api.session.media.MediaService
 import org.matrix.android.sdk.api.session.permalinks.PermalinkService
 import org.matrix.android.sdk.api.session.profile.ProfileService
 import org.matrix.android.sdk.api.session.pushers.PushersService
@@ -181,6 +182,11 @@ interface Session :
      */
     fun widgetService(): WidgetService
 
+    /**
+     * Returns the media service associated with the session
+     */
+    fun mediaService(): MediaService
+
     /**
      * Returns the integration manager service associated with the session
      */

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/content/ContentAttachmentData.kt

@@ -21,6 +21,7 @@ import android.os.Parcelable
 import androidx.exifinterface.media.ExifInterface
 import com.squareup.moshi.JsonClass
 import kotlinx.android.parcel.Parcelize
+import org.matrix.android.sdk.api.util.MimeTypes.normalizeMimeType
 
 @Parcelize
 @JsonClass(generateAdapter = true)
@@ -45,5 +46,5 @@ data class ContentAttachmentData(
         VIDEO
     }
 
-    fun getSafeMimeType() = if (mimeType == "image/jpg") "image/jpeg" else mimeType
+    fun getSafeMimeType() = mimeType?.normalizeMimeType()
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/file/FileService.kt

@@ -18,8 +18,12 @@ package org.matrix.android.sdk.api.session.file
 
 import android.net.Uri
 import org.matrix.android.sdk.api.MatrixCallback
+import org.matrix.android.sdk.api.session.room.model.message.MessageWithAttachmentContent
+import org.matrix.android.sdk.api.session.room.model.message.getFileName
+import org.matrix.android.sdk.api.session.room.model.message.getFileUrl
 import org.matrix.android.sdk.api.util.Cancelable
 import org.matrix.android.sdk.internal.crypto.attachments.ElementToDecrypt
+import org.matrix.android.sdk.internal.crypto.attachments.toElementToDecrypt
 import java.io.File
 
 /**
@@ -27,23 +31,6 @@ import java.io.File
  */
 interface FileService {
 
-    enum class DownloadMode {
-        /**
-         * Download file in external storage
-         */
-        TO_EXPORT,
-
-        /**
-         * Download file in cache
-         */
-        FOR_INTERNAL_USE,
-
-        /**
-         * Download file in file provider path
-         */
-        FOR_EXTERNAL_SHARE
-    }
-
     enum class FileState {
         IN_CACHE,
         DOWNLOADING,
@@ -54,34 +41,79 @@ interface FileService {
      * Download a file.
      * Result will be a decrypted file, stored in the cache folder. url parameter will be used to create unique filename to avoid name collision.
      */
-    fun downloadFile(
-            downloadMode: DownloadMode,
-            id: String,
-            fileName: String,
-            mimeType: String?,
-            url: String?,
-            elementToDecrypt: ElementToDecrypt?,
-            callback: MatrixCallback<File>): Cancelable
+    fun downloadFile(fileName: String,
+                     mimeType: String?,
+                     url: String?,
+                     elementToDecrypt: ElementToDecrypt?,
+                     callback: MatrixCallback<File>): Cancelable
 
-    fun isFileInCache(mxcUrl: String, mimeType: String?): Boolean
+    fun downloadFile(messageContent: MessageWithAttachmentContent,
+                     callback: MatrixCallback<File>): Cancelable =
+            downloadFile(
+                    fileName = messageContent.getFileName(),
+                    mimeType = messageContent.mimeType,
+                    url = messageContent.getFileUrl(),
+                    elementToDecrypt = messageContent.encryptedFileInfo?.toElementToDecrypt(),
+                    callback = callback
+            )
+
+    fun isFileInCache(mxcUrl: String?,
+                      fileName: String,
+                      mimeType: String?,
+                      elementToDecrypt: ElementToDecrypt?
+    ): Boolean
+
+    fun isFileInCache(messageContent: MessageWithAttachmentContent) =
+            isFileInCache(
+                    mxcUrl = messageContent.getFileUrl(),
+                    fileName = messageContent.getFileName(),
+                    mimeType = messageContent.mimeType,
+                    elementToDecrypt = messageContent.encryptedFileInfo?.toElementToDecrypt())
 
     /**
      * Use this URI and pass it to intent using flag Intent.FLAG_GRANT_READ_URI_PERMISSION
      * (if not other app won't be able to access it)
      */
-    fun getTemporarySharableURI(mxcUrl: String, mimeType: String?): Uri?
+    fun getTemporarySharableURI(mxcUrl: String?,
+                                fileName: String,
+                                mimeType: String?,
+                                elementToDecrypt: ElementToDecrypt?): Uri?
+
+    fun getTemporarySharableURI(messageContent: MessageWithAttachmentContent): Uri? =
+            getTemporarySharableURI(
+                    mxcUrl = messageContent.getFileUrl(),
+                    fileName = messageContent.getFileName(),
+                    mimeType = messageContent.mimeType,
+                    elementToDecrypt = messageContent.encryptedFileInfo?.toElementToDecrypt()
+            )
 
     /**
      * Get information on the given file.
      * Mimetype should be the same one as passed to downloadFile (limitation for now)
      */
-    fun fileState(mxcUrl: String, mimeType: String?): FileState
+    fun fileState(mxcUrl: String?,
+                  fileName: String,
+                  mimeType: String?,
+                  elementToDecrypt: ElementToDecrypt?): FileState
+
+    fun fileState(messageContent: MessageWithAttachmentContent): FileState =
+            fileState(
+                    mxcUrl = messageContent.getFileUrl(),
+                    fileName = messageContent.getFileName(),
+                    mimeType = messageContent.mimeType,
+                    elementToDecrypt = messageContent.encryptedFileInfo?.toElementToDecrypt()
+            )
 
     /**
-     * Clears all the files downloaded by the service
+     * Clears all the files downloaded by the service, including decrypted files
      */
     fun clearCache()
 
+    /**
+     * Clears all the decrypted files by the service
+     */
+    fun clearDecryptedCache()
+
     /**
      * Get size of cached files
      */

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/media/MediaService.kt

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.api.session.media
+
+import org.matrix.android.sdk.api.cache.CacheStrategy
+import org.matrix.android.sdk.api.session.events.model.Event
+import org.matrix.android.sdk.api.util.JsonDict
+
+interface MediaService {
+    /**
+     * Extract URLs from an Event.
+     * @return the list of URLs contains in the body of the Event. It does not mean that URLs in this list have UrlPreview data
+     */
+    fun extractUrls(event: Event): List<String>
+
+    /**
+     * Get Raw Url Preview data from the homeserver. There is no cache management for this request
+     * @param url The url to get the preview data from
+     * @param timestamp The optional timestamp
+     */
+    suspend fun getRawPreviewUrl(url: String, timestamp: Long?): JsonDict
+
+    /**
+     * Get Url Preview data from the homeserver, or from cache, depending on the cache strategy
+     * @param url The url to get the preview data from
+     * @param timestamp The optional timestamp. Note that this parameter is not taken into account
+     * if the data is already in cache and the cache strategy allow to use it
+     * @param cacheStrategy the cache strategy, see the type for more details
+     */
+    suspend fun getPreviewUrl(url: String, timestamp: Long?, cacheStrategy: CacheStrategy): PreviewUrlData
+
+    /**
+     * Clear the cache of all retrieved UrlPreview data
+     */
+    suspend fun clearCache()
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/media/PreviewUrlData.kt

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.api.session.media
+
+/**
+ * Facility data class to get the common field of a PreviewUrl response form the server
+ *
+ * Example of return data for the url `https://matrix.org`:
+ * <pre>
+ * {
+ *     "matrix:image:size": 112805,
+ *     "og:description": "Matrix is an open standard for interoperable, decentralised, real-time communication",
+ *     "og:image": "mxc://matrix.org/2020-12-03_uFqjagCCTJbaaJxb",
+ *     "og:image:alt": "Matrix is an open standard for interoperable, decentralised, real-time communication",
+ *     "og:image:height": 467,
+ *     "og:image:type": "image/jpeg",
+ *     "og:image:width": 911,
+ *     "og:locale": "en_US",
+ *     "og:site_name": "Matrix.org",
+ *     "og:title": "Matrix.org",
+ *     "og:type": "website",
+ *     "og:url": "https://matrix.org"
+ * }
+ * </pre>
+ */
+data class PreviewUrlData(
+        // Value of field "og:url". If not provided, this is the value passed in parameter
+        val url: String,
+        // Value of field "og:site_name"
+        val siteName: String?,
+        // Value of field "og:title"
+        val title: String?,
+        // Value of field "og:description"
+        val description: String?,
+        // Value of field "og:image"
+        val mxcUrl: String?
+)

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/model/message/MessageImageContent.kt

@@ -20,6 +20,7 @@ import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
 import org.matrix.android.sdk.api.session.events.model.Content
 import org.matrix.android.sdk.api.session.room.model.relation.RelationDefaultContent
+import org.matrix.android.sdk.api.util.MimeTypes
 import org.matrix.android.sdk.internal.crypto.model.rest.EncryptedFileInfo
 
 @JsonClass(generateAdapter = true)
@@ -54,5 +55,5 @@ data class MessageImageContent(
         @Json(name = "file") override val encryptedFileInfo: EncryptedFileInfo? = null
 ) : MessageImageInfoContent {
     override val mimeType: String?
-        get() = encryptedFileInfo?.mimetype ?: info?.mimeType ?: "image/*"
+        get() = encryptedFileInfo?.mimetype ?: info?.mimeType ?: MimeTypes.Images
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/util/MimeTypes.kt

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.api.util
+
+import org.matrix.android.sdk.api.extensions.orFalse
+
+// The Android SDK does not provide constant for mime type, add some of them here
+object MimeTypes {
+    const val Any: String = "*/*"
+    const val OctetStream = "application/octet-stream"
+
+    const val Images = "image/*"
+
+    const val Png = "image/png"
+    const val BadJpg = "image/jpg"
+    const val Jpeg = "image/jpeg"
+    const val Gif = "image/gif"
+
+    fun String?.normalizeMimeType() = if (this == BadJpg) Jpeg else this
+
+    fun String?.isMimeTypeImage() = this?.startsWith("image/").orFalse()
+    fun String?.isMimeTypeVideo() = this?.startsWith("video/").orFalse()
+    fun String?.isMimeTypeAudio() = this?.startsWith("audio/").orFalse()
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/RealmSessionStoreMigration.kt

@@ -20,6 +20,7 @@ import io.realm.DynamicRealm
 import io.realm.RealmMigration
 import org.matrix.android.sdk.internal.database.model.HomeServerCapabilitiesEntityFields
 import org.matrix.android.sdk.internal.database.model.PendingThreePidEntityFields
+import org.matrix.android.sdk.internal.database.model.PreviewUrlCacheEntityFields
 import org.matrix.android.sdk.internal.database.model.RoomSummaryEntityFields
 import timber.log.Timber
 import javax.inject.Inject
@@ -27,7 +28,7 @@ import javax.inject.Inject
 class RealmSessionStoreMigration @Inject constructor() : RealmMigration {
 
     companion object {
-        const val SESSION_STORE_SCHEMA_VERSION = 5L
+        const val SESSION_STORE_SCHEMA_VERSION = 6L
     }
 
     override fun migrate(realm: DynamicRealm, oldVersion: Long, newVersion: Long) {
@@ -38,6 +39,7 @@ class RealmSessionStoreMigration @Inject constructor() : RealmMigration {
         if (oldVersion <= 2) migrateTo3(realm)
         if (oldVersion <= 3) migrateTo4(realm)
         if (oldVersion <= 4) migrateTo5(realm)
+        if (oldVersion <= 5) migrateTo6(realm)
     }
 
     private fun migrateTo1(realm: DynamicRealm) {
@@ -89,4 +91,18 @@ class RealmSessionStoreMigration @Inject constructor() : RealmMigration {
                 ?.removeField("adminE2EByDefault")
                 ?.removeField("preferredJitsiDomain")
     }
+
+    private fun migrateTo6(realm: DynamicRealm) {
+        Timber.d("Step 5 -> 6")
+        realm.schema.create("PreviewUrlCacheEntity")
+                .addField(PreviewUrlCacheEntityFields.URL, String::class.java)
+                .setRequired(PreviewUrlCacheEntityFields.URL, true)
+                .addPrimaryKey(PreviewUrlCacheEntityFields.URL)
+                .addField(PreviewUrlCacheEntityFields.URL_FROM_SERVER, String::class.java)
+                .addField(PreviewUrlCacheEntityFields.SITE_NAME, String::class.java)
+                .addField(PreviewUrlCacheEntityFields.TITLE, String::class.java)
+                .addField(PreviewUrlCacheEntityFields.DESCRIPTION, String::class.java)
+                .addField(PreviewUrlCacheEntityFields.MXC_URL, String::class.java)
+                .addField(PreviewUrlCacheEntityFields.LAST_UPDATED_TIMESTAMP, Long::class.java)
+    }
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/model/PreviewUrlCacheEntity.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.database.model
+
+import io.realm.RealmObject
+import io.realm.annotations.PrimaryKey
+
+internal open class PreviewUrlCacheEntity(
+        @PrimaryKey
+        var url: String = "",
+
+        var urlFromServer: String? = null,
+        var siteName: String? = null,
+        var title: String? = null,
+        var description: String? = null,
+        var mxcUrl: String? = null,
+
+        var lastUpdatedTimestamp: Long = 0L
+) : RealmObject() {
+
+    companion object
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/model/SessionRealmModule.kt

@@ -48,6 +48,7 @@ import io.realm.annotations.RealmModule
             PushRulesEntity::class,
             PushRuleEntity::class,
             PushConditionEntity::class,
+            PreviewUrlCacheEntity::class,
             PusherEntity::class,
             PusherDataEntity::class,
             ReadReceiptsSummaryEntity::class,

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/database/query/PreviewUrlCacheEntityQueries.kt

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.database.query
+
+import io.realm.Realm
+import io.realm.kotlin.createObject
+import io.realm.kotlin.where
+import org.matrix.android.sdk.internal.database.model.PreviewUrlCacheEntity
+import org.matrix.android.sdk.internal.database.model.PreviewUrlCacheEntityFields
+
+/**
+ * Get the current PreviewUrlCacheEntity, return null if it does not exist
+ */
+internal fun PreviewUrlCacheEntity.Companion.get(realm: Realm, url: String): PreviewUrlCacheEntity? {
+    return realm.where<PreviewUrlCacheEntity>()
+            .equalTo(PreviewUrlCacheEntityFields.URL, url)
+            .findFirst()
+}
+
+/**
+ * Get the current PreviewUrlCacheEntity, create one if it does not exist
+ */
+internal fun PreviewUrlCacheEntity.Companion.getOrCreate(realm: Realm, url: String): PreviewUrlCacheEntity {
+    return get(realm, url) ?: realm.createObject(url)
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/di/MatrixComponent.kt

@@ -71,9 +71,6 @@ internal interface MatrixComponent {
     @CacheDirectory
     fun cacheDir(): File
 
-    @ExternalFilesDirectory
-    fun externalFilesDir(): File?
-
     fun olmManager(): OlmManager
 
     fun taskExecutor(): TaskExecutor

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/di/MatrixModule.kt

@@ -57,13 +57,6 @@ internal object MatrixModule {
         return context.cacheDir
     }
 
-    @JvmStatic
-    @Provides
-    @ExternalFilesDirectory
-    fun providesExternalFilesDir(context: Context): File? {
-        return context.getExternalFilesDir(null)
-    }
-
     @JvmStatic
     @Provides
     @MatrixScope

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/network/Request.kt

@@ -16,14 +16,15 @@
 
 package org.matrix.android.sdk.internal.network
 
-import org.matrix.android.sdk.api.failure.Failure
-import org.matrix.android.sdk.api.failure.shouldBeRetried
-import org.matrix.android.sdk.internal.network.ssl.CertUtil
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.delay
 import org.greenrobot.eventbus.EventBus
+import org.matrix.android.sdk.api.failure.Failure
+import org.matrix.android.sdk.api.failure.shouldBeRetried
+import org.matrix.android.sdk.internal.network.ssl.CertUtil
 import retrofit2.Call
 import retrofit2.awaitResponse
+import timber.log.Timber
 import java.io.IOException
 
 internal suspend inline fun <DATA : Any> executeRequest(eventBus: EventBus?,
@@ -49,6 +50,9 @@ internal class Request<DATA : Any>(private val eventBus: EventBus?) {
                 throw response.toFailure(eventBus)
             }
         } catch (exception: Throwable) {
+            // Log some details about the request which has failed
+            Timber.e("Exception when executing request ${apiCall.request().method} ${apiCall.request().url.toString().substringBefore("?")}")
+
             // Check if this is a certificateException
             CertUtil.getCertificateException(exception)
                     // TODO Support certificate error once logged

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/raw/DefaultRawService.kt

@@ -16,7 +16,7 @@
 
 package org.matrix.android.sdk.internal.raw
 
-import org.matrix.android.sdk.api.raw.RawCacheStrategy
+import org.matrix.android.sdk.api.cache.CacheStrategy
 import org.matrix.android.sdk.api.raw.RawService
 import java.util.concurrent.TimeUnit
 import javax.inject.Inject
@@ -25,15 +25,15 @@ internal class DefaultRawService @Inject constructor(
         private val getUrlTask: GetUrlTask,
         private val cleanRawCacheTask: CleanRawCacheTask
 ) : RawService {
-    override suspend fun getUrl(url: String, rawCacheStrategy: RawCacheStrategy): String {
-        return getUrlTask.execute(GetUrlTask.Params(url, rawCacheStrategy))
+    override suspend fun getUrl(url: String, cacheStrategy: CacheStrategy): String {
+        return getUrlTask.execute(GetUrlTask.Params(url, cacheStrategy))
     }
 
     override suspend fun getWellknown(userId: String): String {
         val homeServerDomain = userId.substringAfter(":")
         return getUrl(
                 "https://$homeServerDomain/.well-known/matrix/client",
-                RawCacheStrategy.TtlCache(TimeUnit.HOURS.toMillis(8), false)
+                CacheStrategy.TtlCache(TimeUnit.HOURS.toMillis(8), false)
         )
     }
 

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/raw/GetUrlTask.kt

@@ -18,7 +18,7 @@ package org.matrix.android.sdk.internal.raw
 
 import com.zhuinden.monarchy.Monarchy
 import okhttp3.ResponseBody
-import org.matrix.android.sdk.api.raw.RawCacheStrategy
+import org.matrix.android.sdk.api.cache.CacheStrategy
 import org.matrix.android.sdk.internal.database.model.RawCacheEntity
 import org.matrix.android.sdk.internal.database.query.get
 import org.matrix.android.sdk.internal.database.query.getOrCreate
@@ -32,7 +32,7 @@ import javax.inject.Inject
 internal interface GetUrlTask : Task<GetUrlTask.Params, String> {
     data class Params(
             val url: String,
-            val rawCacheStrategy: RawCacheStrategy
+            val cacheStrategy: CacheStrategy
     )
 }
 
@@ -42,14 +42,14 @@ internal class DefaultGetUrlTask @Inject constructor(
 ) : GetUrlTask {
 
     override suspend fun execute(params: GetUrlTask.Params): String {
-        return when (params.rawCacheStrategy) {
-            RawCacheStrategy.NoCache       -> doRequest(params.url)
-            is RawCacheStrategy.TtlCache   -> doRequestWithCache(
+        return when (params.cacheStrategy) {
+            CacheStrategy.NoCache       -> doRequest(params.url)
+            is CacheStrategy.TtlCache   -> doRequestWithCache(
                     params.url,
-                    params.rawCacheStrategy.validityDurationInMillis,
-                    params.rawCacheStrategy.strict
+                    params.cacheStrategy.validityDurationInMillis,
+                    params.cacheStrategy.strict
             )
-            RawCacheStrategy.InfiniteCache -> doRequestWithCache(
+            CacheStrategy.InfiniteCache -> doRequestWithCache(
                     params.url,
                     Long.MAX_VALUE,
                     true

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/DefaultFileService.kt

@@ -21,6 +21,10 @@ import android.net.Uri
 import android.webkit.MimeTypeMap
 import androidx.core.content.FileProvider
 import arrow.core.Try
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import okhttp3.OkHttpClient
+import okhttp3.Request
 import org.matrix.android.sdk.api.MatrixCallback
 import org.matrix.android.sdk.api.extensions.tryOrNull
 import org.matrix.android.sdk.api.session.content.ContentUrlResolver
@@ -29,35 +33,21 @@ import org.matrix.android.sdk.api.util.Cancelable
 import org.matrix.android.sdk.api.util.NoOpCancellable
 import org.matrix.android.sdk.internal.crypto.attachments.ElementToDecrypt
 import org.matrix.android.sdk.internal.crypto.attachments.MXEncryptedAttachments
-import org.matrix.android.sdk.internal.di.CacheDirectory
-import org.matrix.android.sdk.internal.di.ExternalFilesDirectory
 import org.matrix.android.sdk.internal.di.SessionDownloadsDirectory
 import org.matrix.android.sdk.internal.di.UnauthenticatedWithCertificateWithProgress
 import org.matrix.android.sdk.internal.session.download.DownloadProgressInterceptor.Companion.DOWNLOAD_PROGRESS_INTERCEPTOR_HEADER
 import org.matrix.android.sdk.internal.task.TaskExecutor
 import org.matrix.android.sdk.internal.util.MatrixCoroutineDispatchers
+import org.matrix.android.sdk.internal.util.md5
 import org.matrix.android.sdk.internal.util.toCancelable
 import org.matrix.android.sdk.internal.util.writeToFile
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
-import okhttp3.OkHttpClient
-import okhttp3.Request
-import okio.buffer
-import okio.sink
-import okio.source
 import timber.log.Timber
 import java.io.File
 import java.io.IOException
-import java.io.InputStream
-import java.net.URLEncoder
 import javax.inject.Inject
 
 internal class DefaultFileService @Inject constructor(
         private val context: Context,
-        @CacheDirectory
-        private val cacheDirectory: File,
-        @ExternalFilesDirectory
-        private val externalFilesDirectory: File?,
         @SessionDownloadsDirectory
         private val sessionCacheDirectory: File,
         private val contentUrlResolver: ContentUrlResolver,
@@ -67,9 +57,17 @@ internal class DefaultFileService @Inject constructor(
         private val taskExecutor: TaskExecutor
 ) : FileService {
 
-    private fun String.safeFileName() = URLEncoder.encode(this, Charsets.US_ASCII.displayName())
+    // Legacy folder, will be deleted
+    private val legacyFolder = File(sessionCacheDirectory, "MF")
+    // Folder to store downloaded files (not decrypted)
+    private val downloadFolder = File(sessionCacheDirectory, "F")
+    // Folder to store decrypted files
+    private val decryptedFolder = File(downloadFolder, "D")
 
-    private val downloadFolder = File(sessionCacheDirectory, "MF")
+    init {
+        // Clear the legacy downloaded files
+        legacyFolder.deleteRecursively()
+    }
 
     /**
      * Retain ongoing downloads to avoid re-downloading and already downloading file
@@ -81,28 +79,26 @@ internal class DefaultFileService @Inject constructor(
      * Download file in the cache folder, and eventually decrypt it
      * TODO looks like files are copied 3 times
      */
-    override fun downloadFile(downloadMode: FileService.DownloadMode,
-                              id: String,
-                              fileName: String,
+    override fun downloadFile(fileName: String,
                               mimeType: String?,
                               url: String?,
                               elementToDecrypt: ElementToDecrypt?,
                               callback: MatrixCallback<File>): Cancelable {
-        val unwrappedUrl = url ?: return NoOpCancellable.also {
+        url ?: return NoOpCancellable.also {
             callback.onFailure(IllegalArgumentException("url is null"))
         }
 
-        Timber.v("## FileService downloadFile $unwrappedUrl")
+        Timber.v("## FileService downloadFile $url")
 
         synchronized(ongoing) {
-            val existing = ongoing[unwrappedUrl]
+            val existing = ongoing[url]
             if (existing != null) {
                 Timber.v("## FileService downloadFile is already downloading.. ")
                 existing.add(callback)
                 return NoOpCancellable
             } else {
                 // mark as tracked
-                ongoing[unwrappedUrl] = ArrayList()
+                ongoing[url] = ArrayList()
                 // and proceed to download
             }
         }
@@ -110,15 +106,15 @@ internal class DefaultFileService @Inject constructor(
         return taskExecutor.executorScope.launch(coroutineDispatchers.main) {
             withContext(coroutineDispatchers.io) {
                 Try {
-                    if (!downloadFolder.exists()) {
-                        downloadFolder.mkdirs()
+                    if (!decryptedFolder.exists()) {
+                        decryptedFolder.mkdirs()
                     }
                     // ensure we use unique file name by using URL (mapped to suitable file name)
                     // Also we need to add extension for the FileProvider, if not it lot's of app that it's
                     // shared with will not function well (even if mime type is passed in the intent)
-                    File(downloadFolder, fileForUrl(unwrappedUrl, mimeType))
-                }.flatMap { destFile ->
-                    if (!destFile.exists()) {
+                    getFiles(url, fileName, mimeType, elementToDecrypt != null)
+                }.flatMap { cachedFiles ->
+                    if (!cachedFiles.file.exists()) {
                         val resolvedUrl = contentUrlResolver.resolveFullSize(url) ?: return@flatMap Try.Failure(IllegalArgumentException("url is null"))
 
                         val request = Request.Builder()
@@ -141,79 +137,153 @@ internal class DefaultFileService @Inject constructor(
 
                         Timber.v("Response size ${response.body?.contentLength()} - Stream available: ${!source.exhausted()}")
 
-                        if (elementToDecrypt != null) {
-                            Timber.v("## FileService: decrypt file")
-                            val decryptSuccess = destFile.outputStream().buffered().use {
-                                MXEncryptedAttachments.decryptAttachment(
-                                        source.inputStream(),
-                                        elementToDecrypt,
-                                        it
-                                )
-                            }
-                            response.close()
-                            if (!decryptSuccess) {
-                                return@flatMap Try.Failure(IllegalStateException("Decryption error"))
-                            }
-                        } else {
-                            writeToFile(source.inputStream(), destFile)
-                            response.close()
-                        }
+                        // Write the file to cache (encrypted version if the file is encrypted)
+                        writeToFile(source.inputStream(), cachedFiles.file)
+                        response.close()
                     } else {
                         Timber.v("## FileService: cache hit for $url")
                     }
 
-                    Try.just(copyFile(destFile, downloadMode))
+                    Try.just(cachedFiles)
                 }
-            }.fold({
-                callback.onFailure(it)
-                // notify concurrent requests
-                val toNotify = synchronized(ongoing) {
-                    ongoing[unwrappedUrl]?.also {
-                        ongoing.remove(unwrappedUrl)
+            }.flatMap { cachedFiles ->
+                // Decrypt if necessary
+                if (cachedFiles.decryptedFile != null) {
+                    if (!cachedFiles.decryptedFile.exists()) {
+                        Timber.v("## FileService: decrypt file")
+                        // Ensure the parent folder exists
+                        cachedFiles.decryptedFile.parentFile?.mkdirs()
+                        val decryptSuccess = cachedFiles.file.inputStream().use { inputStream ->
+                            cachedFiles.decryptedFile.outputStream().buffered().use { outputStream ->
+                                MXEncryptedAttachments.decryptAttachment(
+                                        inputStream,
+                                        elementToDecrypt,
+                                        outputStream
+                                )
+                            }
+                        }
+                        if (!decryptSuccess) {
+                            return@flatMap Try.Failure(IllegalStateException("Decryption error"))
+                        }
+                    } else {
+                        Timber.v("## FileService: cache hit for decrypted file")
                     }
+                    Try.just(cachedFiles.decryptedFile)
+                } else {
+                    // Clear file
+                    Try.just(cachedFiles.file)
                 }
-                toNotify?.forEach { otherCallbacks ->
-                    tryOrNull { otherCallbacks.onFailure(it) }
-                }
-            }, { file ->
-                callback.onSuccess(file)
-                // notify concurrent requests
-                val toNotify = synchronized(ongoing) {
-                    ongoing[unwrappedUrl]?.also {
-                        ongoing.remove(unwrappedUrl)
+            }.fold(
+                    { throwable ->
+                        callback.onFailure(throwable)
+                        // notify concurrent requests
+                        val toNotify = synchronized(ongoing) {
+                            ongoing[url]?.also {
+                                ongoing.remove(url)
+                            }
+                        }
+                        toNotify?.forEach { otherCallbacks ->
+                            tryOrNull { otherCallbacks.onFailure(throwable) }
+                        }
+                    },
+                    { file ->
+                        callback.onSuccess(file)
+                        // notify concurrent requests
+                        val toNotify = synchronized(ongoing) {
+                            ongoing[url]?.also {
+                                ongoing.remove(url)
+                            }
+                        }
+                        Timber.v("## FileService additional to notify ${toNotify?.size ?: 0} ")
+                        toNotify?.forEach { otherCallbacks ->
+                            tryOrNull { otherCallbacks.onSuccess(file) }
+                        }
                     }
-                }
-                Timber.v("## FileService additional to notify ${toNotify?.size ?: 0} ")
-                toNotify?.forEach { otherCallbacks ->
-                    tryOrNull { otherCallbacks.onSuccess(file) }
-                }
-            })
+            )
         }.toCancelable()
     }
 
-    fun storeDataFor(url: String, mimeType: String?, inputStream: InputStream) {
-        val file = File(downloadFolder, fileForUrl(url, mimeType))
-        val source = inputStream.source().buffer()
-        file.sink().buffer().let { sink ->
-            source.use { input ->
-                sink.use { output ->
-                    output.writeAll(input)
+    fun storeDataFor(mxcUrl: String,
+                     filename: String?,
+                     mimeType: String?,
+                     originalFile: File,
+                     encryptedFile: File?) {
+        val files = getFiles(mxcUrl, filename, mimeType, encryptedFile != null)
+        if (encryptedFile != null) {
+            // We switch the two files here, original file it the decrypted file
+            files.decryptedFile?.let { originalFile.copyTo(it) }
+            encryptedFile.copyTo(files.file)
+        } else {
+            // Just copy the original file
+            originalFile.copyTo(files.file)
+        }
+    }
+
+    private fun safeFileName(fileName: String?, mimeType: String?): String {
+        return buildString {
+            // filename has to be safe for the Android System
+            val result = fileName
+                    ?.replace("[^a-z A-Z0-9\\\\.\\-]".toRegex(), "_")
+                    ?.takeIf { it.isNotEmpty() }
+                    ?: DEFAULT_FILENAME
+            append(result)
+            // Check that the extension is correct regarding the mimeType
+            val extensionFromMime = mimeType?.let { MimeTypeMap.getSingleton().getExtensionFromMimeType(mimeType) }
+            if (extensionFromMime != null) {
+                // Compare
+                val fileExtension = result.substringAfterLast(delimiter = ".", missingDelimiterValue = "")
+                if (fileExtension.isEmpty() || fileExtension != extensionFromMime) {
+                    // Missing extension, or diff in extension, add the one provided by the mimetype
+                    append(".")
+                    append(extensionFromMime)
                 }
             }
         }
     }
 
-    private fun fileForUrl(url: String, mimeType: String?): String {
-        val extension = mimeType?.let { MimeTypeMap.getSingleton().getExtensionFromMimeType(mimeType) }
-        return if (extension != null) "${url.safeFileName()}.$extension" else url.safeFileName()
+    override fun isFileInCache(mxcUrl: String?,
+                               fileName: String,
+                               mimeType: String?,
+                               elementToDecrypt: ElementToDecrypt?): Boolean {
+        return fileState(mxcUrl, fileName, mimeType, elementToDecrypt) == FileService.FileState.IN_CACHE
     }
 
-    override fun isFileInCache(mxcUrl: String, mimeType: String?): Boolean {
-        return File(downloadFolder, fileForUrl(mxcUrl, mimeType)).exists()
+    internal data class CachedFiles(
+            // This is the downloaded file. Can be clear or encrypted
+            val file: File,
+            // This is the decrypted file. Null if the original file is not encrypted
+            val decryptedFile: File?
+    ) {
+        fun getClearFile(): File = decryptedFile ?: file
     }
 
-    override fun fileState(mxcUrl: String, mimeType: String?): FileService.FileState {
-        if (isFileInCache(mxcUrl, mimeType)) return FileService.FileState.IN_CACHE
+    private fun getFiles(mxcUrl: String,
+                         fileName: String?,
+                         mimeType: String?,
+                         isEncrypted: Boolean): CachedFiles {
+        val hashFolder = mxcUrl.md5()
+        val safeFileName = safeFileName(fileName, mimeType)
+        return if (isEncrypted) {
+            // Encrypted file
+            CachedFiles(
+                    File(downloadFolder, "$hashFolder/$ENCRYPTED_FILENAME"),
+                    File(decryptedFolder, "$hashFolder/$safeFileName")
+            )
+        } else {
+            // Clear file
+            CachedFiles(
+                    File(downloadFolder, "$hashFolder/$safeFileName"),
+                    null
+            )
+        }
+    }
+
+    override fun fileState(mxcUrl: String?,
+                           fileName: String,
+                           mimeType: String?,
+                           elementToDecrypt: ElementToDecrypt?): FileService.FileState {
+        mxcUrl ?: return FileService.FileState.UNKNOWN
+        if (getFiles(mxcUrl, fileName, mimeType, elementToDecrypt != null).file.exists()) return FileService.FileState.IN_CACHE
         val isDownloading = synchronized(ongoing) {
             ongoing[mxcUrl] != null
         }
@@ -224,26 +294,18 @@ internal class DefaultFileService @Inject constructor(
      * Use this URI and pass it to intent using flag Intent.FLAG_GRANT_READ_URI_PERMISSION
      * (if not other app won't be able to access it)
      */
-    override fun getTemporarySharableURI(mxcUrl: String, mimeType: String?): Uri? {
+    override fun getTemporarySharableURI(mxcUrl: String?,
+                                         fileName: String,
+                                         mimeType: String?,
+                                         elementToDecrypt: ElementToDecrypt?): Uri? {
+        mxcUrl ?: return null
         // this string could be extracted no?
         val authority = "${context.packageName}.mx-sdk.fileprovider"
-        val targetFile = File(downloadFolder, fileForUrl(mxcUrl, mimeType))
+        val targetFile = getFiles(mxcUrl, fileName, mimeType, elementToDecrypt != null).getClearFile()
         if (!targetFile.exists()) return null
         return FileProvider.getUriForFile(context, authority, targetFile)
     }
 
-    private fun copyFile(file: File, downloadMode: FileService.DownloadMode): File {
-        // TODO some of this seems outdated, will need to be re-worked
-        return when (downloadMode) {
-            FileService.DownloadMode.TO_EXPORT          ->
-                file.copyTo(File(externalFilesDirectory, file.name), true)
-            FileService.DownloadMode.FOR_EXTERNAL_SHARE ->
-                file.copyTo(File(File(cacheDirectory, "ext_share"), file.name), true)
-            FileService.DownloadMode.FOR_INTERNAL_USE   ->
-                file
-        }
-    }
-
     override fun getCacheSize(): Int {
         return downloadFolder.walkTopDown()
                 .onEnter {
@@ -256,4 +318,14 @@ internal class DefaultFileService @Inject constructor(
     override fun clearCache() {
         downloadFolder.deleteRecursively()
     }
+
+    override fun clearDecryptedCache() {
+        decryptedFolder.deleteRecursively()
+    }
+
+    companion object {
+        private const val ENCRYPTED_FILENAME = "encrypted.bin"
+        // The extension would be added from the mimetype
+        private const val DEFAULT_FILENAME = "file"
+    }
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/DefaultSession.kt

@@ -43,6 +43,7 @@ import org.matrix.android.sdk.api.session.file.FileService
 import org.matrix.android.sdk.api.session.group.GroupService
 import org.matrix.android.sdk.api.session.homeserver.HomeServerCapabilitiesService
 import org.matrix.android.sdk.api.session.integrationmanager.IntegrationManagerService
+import org.matrix.android.sdk.api.session.media.MediaService
 import org.matrix.android.sdk.api.session.permalinks.PermalinkService
 import org.matrix.android.sdk.api.session.profile.ProfileService
 import org.matrix.android.sdk.api.session.pushers.PushersService
@@ -102,6 +103,7 @@ internal class DefaultSession @Inject constructor(
         private val permalinkService: Lazy<PermalinkService>,
         private val secureStorageService: Lazy<SecureStorageService>,
         private val profileService: Lazy<ProfileService>,
+        private val mediaService: Lazy<MediaService>,
         private val widgetService: Lazy<WidgetService>,
         private val syncThreadProvider: Provider<SyncThread>,
         private val contentUrlResolver: ContentUrlResolver,
@@ -263,6 +265,8 @@ internal class DefaultSession @Inject constructor(
 
     override fun widgetService(): WidgetService = widgetService.get()
 
+    override fun mediaService(): MediaService = mediaService.get()
+
     override fun integrationManagerService() = integrationManagerService
 
     override fun callSignalingService(): CallSignalingService = callSignalingService.get()

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/SessionComponent.kt

@@ -40,6 +40,7 @@ import org.matrix.android.sdk.internal.session.group.GroupModule
 import org.matrix.android.sdk.internal.session.homeserver.HomeServerCapabilitiesModule
 import org.matrix.android.sdk.internal.session.identity.IdentityModule
 import org.matrix.android.sdk.internal.session.integrationmanager.IntegrationManagerModule
+import org.matrix.android.sdk.internal.session.media.MediaModule
 import org.matrix.android.sdk.internal.session.openid.OpenIdModule
 import org.matrix.android.sdk.internal.session.profile.ProfileModule
 import org.matrix.android.sdk.internal.session.pushers.AddHttpPusherWorker
@@ -75,6 +76,7 @@ import org.matrix.android.sdk.internal.util.MatrixCoroutineDispatchers
             GroupModule::class,
             ContentModule::class,
             CacheModule::class,
+            MediaModule::class,
             CryptoModule::class,
             PushersModule::class,
             OpenIdModule::class,

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/SessionModule.kt

@@ -50,6 +50,7 @@ import org.matrix.android.sdk.internal.database.EventInsertLiveObserver
 import org.matrix.android.sdk.internal.database.RealmSessionProvider
 import org.matrix.android.sdk.internal.database.SessionRealmConfigurationFactory
 import org.matrix.android.sdk.internal.di.Authenticated
+import org.matrix.android.sdk.internal.di.CacheDirectory
 import org.matrix.android.sdk.internal.di.DeviceId
 import org.matrix.android.sdk.internal.di.SessionDatabase
 import org.matrix.android.sdk.internal.di.SessionDownloadsDirectory
@@ -169,9 +170,9 @@ internal abstract class SessionModule {
         @JvmStatic
         @Provides
         @SessionDownloadsDirectory
-        fun providesCacheDir(@SessionId sessionId: String,
-                             context: Context): File {
-            return File(context.cacheDir, "downloads/$sessionId")
+        fun providesDownloadsCacheDir(@SessionId sessionId: String,
+                                      @CacheDirectory cacheFile: File): File {
+            return File(cacheFile, "downloads/$sessionId")
         }
 
         @JvmStatic

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/content/ContentUploadResponse.kt

@@ -20,6 +20,9 @@ import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
 
 @JsonClass(generateAdapter = true)
-data class ContentUploadResponse(
+internal data class ContentUploadResponse(
+        /**
+         * Required. The MXC URI to the uploaded content.
+         */
         @Json(name = "content_uri") val contentUri: String
 )

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/content/ThumbnailExtractor.kt

@@ -20,6 +20,7 @@ import android.content.Context
 import android.graphics.Bitmap
 import android.media.MediaMetadataRetriever
 import org.matrix.android.sdk.api.session.content.ContentAttachmentData
+import org.matrix.android.sdk.api.util.MimeTypes
 import timber.log.Timber
 import java.io.ByteArrayOutputStream
 
@@ -58,7 +59,7 @@ internal object ThumbnailExtractor {
                     height = thumbnailHeight,
                     size = thumbnailSize.toLong(),
                     bytes = outputStream.toByteArray(),
-                    mimeType = "image/jpeg"
+                    mimeType = MimeTypes.Jpeg
             )
             thumbnail.recycle()
             outputStream.reset()

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/content/UploadContentWorker.kt

@@ -29,6 +29,7 @@ import org.matrix.android.sdk.api.session.room.model.message.MessageContent
 import org.matrix.android.sdk.api.session.room.model.message.MessageFileContent
 import org.matrix.android.sdk.api.session.room.model.message.MessageImageContent
 import org.matrix.android.sdk.api.session.room.model.message.MessageVideoContent
+import org.matrix.android.sdk.api.util.MimeTypes
 import org.matrix.android.sdk.internal.crypto.attachments.MXEncryptedAttachments
 import org.matrix.android.sdk.internal.crypto.model.rest.EncryptedFileInfo
 import org.matrix.android.sdk.internal.database.mapper.ContentMapper
@@ -151,7 +152,10 @@ internal class UploadContentWorker(val context: Context, params: WorkerParameter
                         params.attachment.size
                 )
 
-                if (attachment.type == ContentAttachmentData.Type.IMAGE && params.compressBeforeSending) {
+                if (attachment.type == ContentAttachmentData.Type.IMAGE
+                        // Do not compress gif
+                        && attachment.mimeType != MimeTypes.Gif
+                        && params.compressBeforeSending) {
                     fileToUpload = imageCompressor.compress(context, workingFile, MAX_IMAGE_SIZE, MAX_IMAGE_SIZE)
                             .also { compressedFile ->
                                 // Get new Bitmap size
@@ -174,14 +178,15 @@ internal class UploadContentWorker(val context: Context, params: WorkerParameter
                     }
                 }
 
+                val encryptedFile: File?
                 val contentUploadResponse = if (params.isEncrypted) {
                     Timber.v("## FileService: Encrypt file")
 
-                    val tmpEncrypted = File.createTempFile(UUID.randomUUID().toString(), null, context.cacheDir)
+                    encryptedFile = File.createTempFile(UUID.randomUUID().toString(), null, context.cacheDir)
                             .also { filesToDelete.add(it) }
 
                     uploadedFileEncryptedFileInfo =
-                            MXEncryptedAttachments.encrypt(fileToUpload.inputStream(), attachment.getSafeMimeType(), tmpEncrypted) { read, total ->
+                            MXEncryptedAttachments.encrypt(fileToUpload.inputStream(), attachment.getSafeMimeType(), encryptedFile) { read, total ->
                                 notifyTracker(params) {
                                     contentUploadStateTracker.setEncrypting(it, read.toLong(), total.toLong())
                                 }
@@ -190,18 +195,23 @@ internal class UploadContentWorker(val context: Context, params: WorkerParameter
                     Timber.v("## FileService: Uploading file")
 
                     fileUploader
-                            .uploadFile(tmpEncrypted, attachment.name, "application/octet-stream", progressListener)
+                            .uploadFile(encryptedFile, attachment.name, MimeTypes.OctetStream, progressListener)
                 } else {
                     Timber.v("## FileService: Clear file")
+                    encryptedFile = null
                     fileUploader
                             .uploadFile(fileToUpload, attachment.name, attachment.getSafeMimeType(), progressListener)
                 }
 
                 Timber.v("## FileService: Update cache storage for ${contentUploadResponse.contentUri}")
                 try {
-                    context.contentResolver.openInputStream(attachment.queryUri)?.let {
-                        fileService.storeDataFor(contentUploadResponse.contentUri, params.attachment.getSafeMimeType(), it)
-                    }
+                    fileService.storeDataFor(
+                            mxcUrl = contentUploadResponse.contentUri,
+                            filename = params.attachment.name,
+                            mimeType = params.attachment.getSafeMimeType(),
+                            originalFile = workingFile,
+                            encryptedFile = encryptedFile
+                    )
                     Timber.v("## FileService: cache storage updated")
                 } catch (failure: Throwable) {
                     Timber.e(failure, "## FileService: Failed to update file cache")
@@ -252,7 +262,7 @@ internal class UploadContentWorker(val context: Context, params: WorkerParameter
                             val encryptionResult = MXEncryptedAttachments.encryptAttachment(thumbnailData.bytes.inputStream(), thumbnailData.mimeType)
                             val contentUploadResponse = fileUploader.uploadByteArray(encryptionResult.encryptedByteArray,
                                     "thumb_${params.attachment.name}",
-                                    "application/octet-stream",
+                                    MimeTypes.OctetStream,
                                     thumbnailProgressListener)
                             UploadThumbnailResult(
                                     contentUploadResponse.contentUri,

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/homeserver/CapabilitiesAPI.kt

@@ -22,19 +22,12 @@ import retrofit2.Call
 import retrofit2.http.GET
 
 internal interface CapabilitiesAPI {
-
     /**
      * Request the homeserver capabilities
      */
     @GET(NetworkConstants.URI_API_PREFIX_PATH_R0 + "capabilities")
     fun getCapabilities(): Call<GetCapabilitiesResult>
 
-    /**
-     * Request the upload capabilities
-     */
-    @GET(NetworkConstants.URI_API_MEDIA_PREFIX_PATH_R0 + "config")
-    fun getUploadCapabilities(): Call<GetUploadCapabilitiesResult>
-
     /**
      * Request the versions
      */

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/homeserver/GetHomeServerCapabilitiesTask.kt

@@ -29,6 +29,8 @@ import org.matrix.android.sdk.internal.di.SessionDatabase
 import org.matrix.android.sdk.internal.di.UserId
 import org.matrix.android.sdk.internal.network.executeRequest
 import org.matrix.android.sdk.internal.session.integrationmanager.IntegrationManagerConfigExtractor
+import org.matrix.android.sdk.internal.session.media.GetMediaConfigResult
+import org.matrix.android.sdk.internal.session.media.MediaAPI
 import org.matrix.android.sdk.internal.task.Task
 import org.matrix.android.sdk.internal.util.awaitTransaction
 import org.matrix.android.sdk.internal.wellknown.GetWellknownTask
@@ -40,6 +42,7 @@ internal interface GetHomeServerCapabilitiesTask : Task<Unit, Unit>
 
 internal class DefaultGetHomeServerCapabilitiesTask @Inject constructor(
         private val capabilitiesAPI: CapabilitiesAPI,
+        private val mediaAPI: MediaAPI,
         @SessionDatabase private val monarchy: Monarchy,
         private val eventBus: EventBus,
         private val getWellknownTask: GetWellknownTask,
@@ -67,9 +70,9 @@ internal class DefaultGetHomeServerCapabilitiesTask @Inject constructor(
             }
         }.getOrNull()
 
-        val uploadCapabilities = runCatching {
-            executeRequest<GetUploadCapabilitiesResult>(eventBus) {
-                apiCall = capabilitiesAPI.getUploadCapabilities()
+        val mediaConfig = runCatching {
+            executeRequest<GetMediaConfigResult>(eventBus) {
+                apiCall = mediaAPI.getMediaConfig()
             }
         }.getOrNull()
 
@@ -83,11 +86,11 @@ internal class DefaultGetHomeServerCapabilitiesTask @Inject constructor(
             getWellknownTask.execute(GetWellknownTask.Params(userId, homeServerConnectionConfig))
         }.getOrNull()
 
-        insertInDb(capabilities, uploadCapabilities, versions, wellknownResult)
+        insertInDb(capabilities, mediaConfig, versions, wellknownResult)
     }
 
     private suspend fun insertInDb(getCapabilitiesResult: GetCapabilitiesResult?,
-                                   getUploadCapabilitiesResult: GetUploadCapabilitiesResult?,
+                                   getMediaConfigResult: GetMediaConfigResult?,
                                    getVersionResult: Versions?,
                                    getWellknownResult: WellknownResult?) {
         monarchy.awaitTransaction { realm ->
@@ -97,8 +100,8 @@ internal class DefaultGetHomeServerCapabilitiesTask @Inject constructor(
                 homeServerCapabilitiesEntity.canChangePassword = getCapabilitiesResult.canChangePassword()
             }
 
-            if (getUploadCapabilitiesResult != null) {
-                homeServerCapabilitiesEntity.maxUploadFileSize = getUploadCapabilitiesResult.maxUploadSize
+            if (getMediaConfigResult != null) {
+                homeServerCapabilitiesEntity.maxUploadFileSize = getMediaConfigResult.maxUploadSize
                         ?: HomeServerCapabilities.MAX_UPLOAD_FILE_SIZE_UNKNOWN
             }
 

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/media/ClearPreviewUrlCacheTask.kt

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.session.media
+
+import com.zhuinden.monarchy.Monarchy
+import io.realm.kotlin.where
+import org.matrix.android.sdk.internal.database.model.PreviewUrlCacheEntity
+import org.matrix.android.sdk.internal.di.SessionDatabase
+import org.matrix.android.sdk.internal.task.Task
+import org.matrix.android.sdk.internal.util.awaitTransaction
+import javax.inject.Inject
+
+internal interface ClearPreviewUrlCacheTask : Task<Unit, Unit>
+
+internal class DefaultClearPreviewUrlCacheTask @Inject constructor(
+        @SessionDatabase private val monarchy: Monarchy
+) : ClearPreviewUrlCacheTask {
+
+    override suspend fun execute(params: Unit) {
+        monarchy.awaitTransaction { realm ->
+            realm.where<PreviewUrlCacheEntity>()
+                    .findAll()
+                    .deleteAllFromRealm()
+        }
+    }
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/media/DefaultMediaService.kt

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.session.media
+
+import androidx.collection.LruCache
+import org.matrix.android.sdk.api.cache.CacheStrategy
+import org.matrix.android.sdk.api.session.events.model.Event
+import org.matrix.android.sdk.api.session.media.MediaService
+import org.matrix.android.sdk.api.session.media.PreviewUrlData
+import org.matrix.android.sdk.api.util.JsonDict
+import org.matrix.android.sdk.internal.util.getOrPut
+import javax.inject.Inject
+
+internal class DefaultMediaService @Inject constructor(
+        private val clearPreviewUrlCacheTask: ClearPreviewUrlCacheTask,
+        private val getPreviewUrlTask: GetPreviewUrlTask,
+        private val getRawPreviewUrlTask: GetRawPreviewUrlTask,
+        private val urlsExtractor: UrlsExtractor
+) : MediaService {
+    // Cache of extracted URLs
+    private val extractedUrlsCache = LruCache<String, List<String>>(1_000)
+
+    override fun extractUrls(event: Event): List<String> {
+        return extractedUrlsCache.getOrPut(event.cacheKey()) { urlsExtractor.extract(event) }
+    }
+
+    private fun Event.cacheKey() = "${eventId ?: ""}-${roomId ?: ""}"
+
+    override suspend fun getRawPreviewUrl(url: String, timestamp: Long?): JsonDict {
+        return getRawPreviewUrlTask.execute(GetRawPreviewUrlTask.Params(url, timestamp))
+    }
+
+    override suspend fun getPreviewUrl(url: String, timestamp: Long?, cacheStrategy: CacheStrategy): PreviewUrlData {
+        return getPreviewUrlTask.execute(GetPreviewUrlTask.Params(url, timestamp, cacheStrategy))
+    }
+
+    override suspend fun clearCache() {
+        extractedUrlsCache.evictAll()
+        clearPreviewUrlCacheTask.execute(Unit)
+    }
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/media/GetMediaConfigResult.kt

@@ -5,7 +5,7 @@
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- * http://www.apache.org/licenses/LICENSE-2.0
+ *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -14,13 +14,13 @@
  * limitations under the License.
  */
 
-package org.matrix.android.sdk.internal.session.homeserver
+package org.matrix.android.sdk.internal.session.media
 
 import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
 
 @JsonClass(generateAdapter = true)
-internal data class GetUploadCapabilitiesResult(
+internal data class GetMediaConfigResult(
         /**
          * The maximum size an upload can be in bytes. Clients SHOULD use this as a guide when uploading content.
          * If not listed or null, the size limit should be treated as unknown.

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/media/GetPreviewUrlTask.kt

@@ -0,0 +1,122 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.session.media
+
+import com.zhuinden.monarchy.Monarchy
+import org.greenrobot.eventbus.EventBus
+import org.matrix.android.sdk.api.cache.CacheStrategy
+import org.matrix.android.sdk.api.session.media.PreviewUrlData
+import org.matrix.android.sdk.api.util.JsonDict
+import org.matrix.android.sdk.internal.database.model.PreviewUrlCacheEntity
+import org.matrix.android.sdk.internal.database.query.get
+import org.matrix.android.sdk.internal.database.query.getOrCreate
+import org.matrix.android.sdk.internal.di.SessionDatabase
+import org.matrix.android.sdk.internal.network.executeRequest
+import org.matrix.android.sdk.internal.task.Task
+import org.matrix.android.sdk.internal.util.awaitTransaction
+import java.util.Date
+import javax.inject.Inject
+
+internal interface GetPreviewUrlTask : Task<GetPreviewUrlTask.Params, PreviewUrlData> {
+    data class Params(
+            val url: String,
+            val timestamp: Long?,
+            val cacheStrategy: CacheStrategy
+    )
+}
+
+internal class DefaultGetPreviewUrlTask @Inject constructor(
+        private val mediaAPI: MediaAPI,
+        private val eventBus: EventBus,
+        @SessionDatabase private val monarchy: Monarchy
+) : GetPreviewUrlTask {
+
+    override suspend fun execute(params: GetPreviewUrlTask.Params): PreviewUrlData {
+        return when (params.cacheStrategy) {
+            CacheStrategy.NoCache -> doRequest(params.url, params.timestamp)
+            is CacheStrategy.TtlCache -> doRequestWithCache(
+                    params.url,
+                    params.timestamp,
+                    params.cacheStrategy.validityDurationInMillis,
+                    params.cacheStrategy.strict
+            )
+            CacheStrategy.InfiniteCache -> doRequestWithCache(
+                    params.url,
+                    params.timestamp,
+                    Long.MAX_VALUE,
+                    true
+            )
+        }
+    }
+
+    private suspend fun doRequest(url: String, timestamp: Long?): PreviewUrlData {
+        return executeRequest<JsonDict>(eventBus) {
+            apiCall = mediaAPI.getPreviewUrlData(url, timestamp)
+        }
+                .toPreviewUrlData(url)
+    }
+
+    private fun JsonDict.toPreviewUrlData(url: String): PreviewUrlData {
+        return PreviewUrlData(
+                url = (get("og:url") as? String) ?: url,
+                siteName = get("og:site_name") as? String,
+                title = get("og:title") as? String,
+                description = get("og:description") as? String,
+                mxcUrl = get("og:image") as? String
+        )
+    }
+
+    private suspend fun doRequestWithCache(url: String, timestamp: Long?, validityDurationInMillis: Long, strict: Boolean): PreviewUrlData {
+        // Get data from cache
+        var dataFromCache: PreviewUrlData? = null
+        var isCacheValid = false
+        monarchy.doWithRealm { realm ->
+            val entity = PreviewUrlCacheEntity.get(realm, url)
+            dataFromCache = entity?.toDomain()
+            isCacheValid = entity != null && Date().time < entity.lastUpdatedTimestamp + validityDurationInMillis
+        }
+
+        val finalDataFromCache = dataFromCache
+        if (finalDataFromCache != null && isCacheValid) {
+            return finalDataFromCache
+        }
+
+        // No cache or outdated cache
+        val data = try {
+            doRequest(url, timestamp)
+        } catch (throwable: Throwable) {
+            // In case of error, we can return value from cache even if outdated
+            return finalDataFromCache
+                    ?.takeIf { !strict }
+                    ?: throw throwable
+        }
+
+        // Store cache
+        monarchy.awaitTransaction { realm ->
+            val previewUrlCacheEntity = PreviewUrlCacheEntity.getOrCreate(realm, url)
+            previewUrlCacheEntity.urlFromServer = data.url
+            previewUrlCacheEntity.siteName = data.siteName
+            previewUrlCacheEntity.title = data.title
+            previewUrlCacheEntity.description = data.description
+            previewUrlCacheEntity.mxcUrl = data.mxcUrl
+
+            previewUrlCacheEntity.lastUpdatedTimestamp = Date().time
+        }
+
+        return data
+    }
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/media/GetRawPreviewUrlTask.kt

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.session.media
+
+import org.greenrobot.eventbus.EventBus
+import org.matrix.android.sdk.api.util.JsonDict
+import org.matrix.android.sdk.internal.network.executeRequest
+import org.matrix.android.sdk.internal.task.Task
+import javax.inject.Inject
+
+internal interface GetRawPreviewUrlTask : Task<GetRawPreviewUrlTask.Params, JsonDict> {
+    data class Params(
+            val url: String,
+            val timestamp: Long?
+    )
+}
+
+internal class DefaultGetRawPreviewUrlTask @Inject constructor(
+        private val mediaAPI: MediaAPI,
+        private val eventBus: EventBus
+) : GetRawPreviewUrlTask {
+
+    override suspend fun execute(params: GetRawPreviewUrlTask.Params): JsonDict {
+        return executeRequest(eventBus) {
+            apiCall = mediaAPI.getPreviewUrlData(params.url, params.timestamp)
+        }
+    }
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/media/MediaAPI.kt

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.session.media
+
+import org.matrix.android.sdk.api.util.JsonDict
+import org.matrix.android.sdk.internal.network.NetworkConstants
+import retrofit2.Call
+import retrofit2.http.GET
+import retrofit2.http.Query
+
+internal interface MediaAPI {
+    /**
+     * Retrieve the configuration of the content repository
+     * Ref: https://matrix.org/docs/spec/client_server/r0.6.1#get-matrix-media-r0-config
+     */
+    @GET(NetworkConstants.URI_API_MEDIA_PREFIX_PATH_R0 + "config")
+    fun getMediaConfig(): Call<GetMediaConfigResult>
+
+    /**
+     * Get information about a URL for the client. Typically this is called when a client
+     * sees a URL in a message and wants to render a preview for the user.
+     * Ref: https://matrix.org/docs/spec/client_server/r0.6.1#get-matrix-media-r0-preview-url
+     * @param url Required. The URL to get a preview of.
+     * @param ts The preferred point in time to return a preview for. The server may return a newer version
+     * if it does not have the requested version available.
+     */
+    @GET(NetworkConstants.URI_API_MEDIA_PREFIX_PATH_R0 + "preview_url")
+    fun getPreviewUrlData(@Query("url") url: String, @Query("ts") ts: Long?): Call<JsonDict>
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/media/MediaModule.kt

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.session.media
+
+import dagger.Binds
+import dagger.Module
+import dagger.Provides
+import org.matrix.android.sdk.api.session.media.MediaService
+import org.matrix.android.sdk.internal.session.SessionScope
+import retrofit2.Retrofit
+
+@Module
+internal abstract class MediaModule {
+
+    @Module
+    companion object {
+        @Provides
+        @JvmStatic
+        @SessionScope
+        fun providesMediaAPI(retrofit: Retrofit): MediaAPI {
+            return retrofit.create(MediaAPI::class.java)
+        }
+    }
+
+    @Binds
+    abstract fun bindMediaService(service: DefaultMediaService): MediaService
+
+    @Binds
+    abstract fun bindGetRawPreviewUrlTask(task: DefaultGetRawPreviewUrlTask): GetRawPreviewUrlTask
+
+    @Binds
+    abstract fun bindGetPreviewUrlTask(task: DefaultGetPreviewUrlTask): GetPreviewUrlTask
+
+    @Binds
+    abstract fun bindClearMediaCacheTask(task: DefaultClearPreviewUrlCacheTask): ClearPreviewUrlCacheTask
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/media/PreviewUrlMapper.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.session.media
+
+import org.matrix.android.sdk.api.session.media.PreviewUrlData
+import org.matrix.android.sdk.internal.database.model.PreviewUrlCacheEntity
+
+/**
+ * PreviewUrlCacheEntity -> PreviewUrlData
+ */
+internal fun PreviewUrlCacheEntity.toDomain() = PreviewUrlData(
+        url = urlFromServer ?: url,
+        siteName = siteName,
+        title = title,
+        description = description,
+        mxcUrl = mxcUrl
+)

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/media/UrlsExtractor.kt

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.session.media
+
+import android.util.Patterns
+import org.matrix.android.sdk.api.session.events.model.Event
+import org.matrix.android.sdk.api.session.events.model.EventType
+import org.matrix.android.sdk.api.session.events.model.toModel
+import org.matrix.android.sdk.api.session.room.model.message.MessageContent
+import org.matrix.android.sdk.api.session.room.model.message.MessageType
+import javax.inject.Inject
+
+internal class UrlsExtractor @Inject constructor() {
+    // Sadly Patterns.WEB_URL_WITH_PROTOCOL is not public so filter the protocol later
+    private val urlRegex = Patterns.WEB_URL.toRegex()
+
+    fun extract(event: Event): List<String> {
+        return event.takeIf { it.getClearType() == EventType.MESSAGE }
+                ?.getClearContent()
+                ?.toModel<MessageContent>()
+                ?.takeIf { it.msgType == MessageType.MSGTYPE_TEXT || it.msgType == MessageType.MSGTYPE_EMOTE }
+                ?.body
+                ?.let { urlRegex.findAll(it) }
+                ?.map { it.value }
+                ?.filter { it.startsWith("https://") || it.startsWith("http://") }
+                ?.distinct()
+                ?.toList()
+                .orEmpty()
+    }
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/profile/DefaultProfileService.kt

@@ -26,6 +26,7 @@ import org.matrix.android.sdk.api.session.identity.ThreePid
 import org.matrix.android.sdk.api.session.profile.ProfileService
 import org.matrix.android.sdk.api.util.Cancelable
 import org.matrix.android.sdk.api.util.JsonDict
+import org.matrix.android.sdk.api.util.MimeTypes
 import org.matrix.android.sdk.api.util.Optional
 import org.matrix.android.sdk.internal.database.model.PendingThreePidEntity
 import org.matrix.android.sdk.internal.database.model.UserThreePidEntity
@@ -80,7 +81,7 @@ internal class DefaultProfileService @Inject constructor(private val taskExecuto
 
     override fun updateAvatar(userId: String, newAvatarUri: Uri, fileName: String, matrixCallback: MatrixCallback<Unit>): Cancelable {
         return taskExecutor.executorScope.launchToCallback(coroutineDispatchers.main, matrixCallback) {
-            val response = fileUploader.uploadFromUri(newAvatarUri, fileName, "image/jpeg")
+            val response = fileUploader.uploadFromUri(newAvatarUri, fileName, MimeTypes.Jpeg)
             setAvatarUrlTask.execute(SetAvatarUrlTask.Params(userId = userId, newAvatarUrl = response.contentUri))
             userStore.updateAvatar(userId, response.contentUri)
         }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/create/CreateRoomBodyBuilder.kt

@@ -23,6 +23,7 @@ import org.matrix.android.sdk.api.session.events.model.EventType
 import org.matrix.android.sdk.api.session.identity.IdentityServiceError
 import org.matrix.android.sdk.api.session.identity.toMedium
 import org.matrix.android.sdk.api.session.room.model.create.CreateRoomParams
+import org.matrix.android.sdk.api.util.MimeTypes
 import org.matrix.android.sdk.internal.crypto.DeviceListManager
 import org.matrix.android.sdk.internal.crypto.MXCRYPTO_ALGORITHM_MEGOLM
 import org.matrix.android.sdk.internal.di.AuthenticatedIdentity
@@ -96,7 +97,7 @@ internal class CreateRoomBodyBuilder @Inject constructor(
                 fileUploader.uploadFromUri(
                         uri = avatarUri,
                         filename = UUID.randomUUID().toString(),
-                        mimeType = "image/jpeg")
+                        mimeType = MimeTypes.Jpeg)
             }
                     ?.let { response ->
                         Event(

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/DefaultSendService.kt

@@ -177,7 +177,7 @@ internal class DefaultSendService @AssistedInject constructor(
                     val attachmentData = ContentAttachmentData(
                             size = messageContent.info!!.size,
                             mimeType = messageContent.info.mimeType!!,
-                            name = messageContent.body,
+                            name = messageContent.getFileName(),
                             queryUri = Uri.parse(messageContent.url),
                             type = ContentAttachmentData.Type.FILE
                     )
@@ -210,6 +210,8 @@ internal class DefaultSendService @AssistedInject constructor(
 
     override fun cancelSend(eventId: String) {
         cancelSendTracker.markLocalEchoForCancel(eventId, roomId)
+        // This is maybe the current task, so cancel it too
+        eventSenderProcessor.cancel(eventId, roomId)
         taskExecutor.executorScope.launch {
             localEchoRepository.deleteFailedEcho(roomId, eventId)
         }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/queue/EventSenderProcessor.kt

@@ -16,6 +16,7 @@
 
 package org.matrix.android.sdk.internal.session.room.send.queue
 
+import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 import org.matrix.android.sdk.api.auth.data.SessionParams
@@ -106,17 +107,21 @@ internal class EventSenderProcessor @Inject constructor(
         // non blocking add to queue
         sendingQueue.add(task)
         markAsManaged(task)
-        return object : Cancelable {
-            override fun cancel() {
-                task.cancel()
-            }
-        }
+        return task
+    }
+
+    fun cancel(eventId: String, roomId: String) {
+        (currentTask as? SendEventQueuedTask)
+                ?.takeIf { it -> it.event.eventId == eventId && it.event.roomId == roomId }
+                ?.cancel()
     }
 
     companion object {
         private const val RETRY_WAIT_TIME_MS = 10_000L
     }
 
+    private var currentTask: QueuedTask? = null
+
     private var sendingQueue = LinkedBlockingQueue<QueuedTask>()
 
     private var networkAvailableLock = Object()
@@ -129,6 +134,7 @@ internal class EventSenderProcessor @Inject constructor(
             while (!isInterrupted) {
                 Timber.v("## SendThread wait for task to process")
                 val task = sendingQueue.take()
+                        .also { currentTask = it }
                 Timber.v("## SendThread Found task to process $task")
 
                 if (task.isCancelled()) {
@@ -183,6 +189,10 @@ internal class EventSenderProcessor @Inject constructor(
                                     task.onTaskFailed()
                                     throw InterruptedException()
                                 }
+                                exception is CancellationException                                                         -> {
+                                    Timber.v("## SendThread task has been cancelled")
+                                    break@retryLoop
+                                }
                                 else                                                                                       -> {
                                     Timber.v("## SendThread retryLoop Un-Retryable error, try next task")
                                     // this task is in error, check next one?

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/queue/QueueMemento.kt

@@ -17,7 +17,6 @@
 package org.matrix.android.sdk.internal.session.room.send.queue
 
 import android.content.Context
-import org.matrix.android.sdk.api.auth.data.sessionId
 import org.matrix.android.sdk.api.extensions.tryOrNull
 import org.matrix.android.sdk.api.session.crypto.CryptoService
 import org.matrix.android.sdk.api.session.room.send.SendState

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/queue/QueuedTask.kt

@@ -16,14 +16,26 @@
 
 package org.matrix.android.sdk.internal.session.room.send.queue
 
-abstract class QueuedTask {
+import org.matrix.android.sdk.api.util.Cancelable
+
+abstract class QueuedTask : Cancelable {
     var retryCount = 0
 
-    abstract suspend fun execute()
+    private var hasBeenCancelled: Boolean = false
+
+    suspend fun execute() {
+        if (!isCancelled()) {
+            doExecute()
+        }
+    }
+
+    abstract suspend fun doExecute()
 
     abstract fun onTaskFailed()
 
-    abstract fun isCancelled() : Boolean
+    open fun isCancelled() = hasBeenCancelled
 
-    abstract fun cancel()
+    final override fun cancel() {
+        hasBeenCancelled = true
+    }
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/queue/RedactQueuedTask.kt

@@ -22,20 +22,18 @@ import org.matrix.android.sdk.internal.session.room.send.CancelSendTracker
 import org.matrix.android.sdk.internal.session.room.send.LocalEchoRepository
 
 internal class RedactQueuedTask(
-        val toRedactEventId: String,
+        private val toRedactEventId: String,
         val redactionLocalEchoId: String,
-        val roomId: String,
-        val reason: String?,
-        val redactEventTask: RedactEventTask,
-        val localEchoRepository: LocalEchoRepository,
-        val cancelSendTracker: CancelSendTracker
+        private val roomId: String,
+        private val reason: String?,
+        private val redactEventTask: RedactEventTask,
+        private val localEchoRepository: LocalEchoRepository,
+        private val cancelSendTracker: CancelSendTracker
 ) : QueuedTask() {
 
-    private var _isCancelled: Boolean = false
+    override fun toString() = "[RedactQueuedTask $redactionLocalEchoId]"
 
-    override fun toString() = "[RedactEventRunnableTask $redactionLocalEchoId]"
-
-    override suspend fun execute() {
+    override suspend fun doExecute() {
         redactEventTask.execute(RedactEventTask.Params(redactionLocalEchoId, roomId, toRedactEventId, reason))
     }
 
@@ -44,10 +42,6 @@ internal class RedactQueuedTask(
     }
 
     override fun isCancelled(): Boolean {
-        return _isCancelled || cancelSendTracker.isCancelRequestedFor(redactionLocalEchoId, roomId)
-    }
-
-    override fun cancel() {
-        _isCancelled = true
+        return super.isCancelled() || cancelSendTracker.isCancelRequestedFor(redactionLocalEchoId, roomId)
     }
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/queue/SendEventQueuedTask.kt

@@ -33,11 +33,9 @@ internal class SendEventQueuedTask(
         val cancelSendTracker: CancelSendTracker
 ) : QueuedTask() {
 
-    private var _isCancelled: Boolean = false
+    override fun toString() = "[SendEventQueuedTask ${event.eventId}]"
 
-    override fun toString() = "[SendEventRunnableTask ${event.eventId}]"
-
-    override suspend fun execute() {
+    override suspend fun doExecute() {
         sendEventTask.execute(SendEventTask.Params(event, encrypt))
     }
 
@@ -56,10 +54,6 @@ internal class SendEventQueuedTask(
     }
 
     override fun isCancelled(): Boolean {
-        return _isCancelled || cancelSendTracker.isCancelRequestedFor(event.eventId, event.roomId)
-    }
-
-    override fun cancel() {
-        _isCancelled = true
+        return super.isCancelled() || cancelSendTracker.isCancelRequestedFor(event.eventId, event.roomId)
     }
 }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/state/DefaultStateService.kt

@@ -32,6 +32,7 @@ import org.matrix.android.sdk.api.session.room.model.RoomJoinRules
 import org.matrix.android.sdk.api.session.room.model.RoomJoinRulesContent
 import org.matrix.android.sdk.api.session.room.state.StateService
 import org.matrix.android.sdk.api.util.JsonDict
+import org.matrix.android.sdk.api.util.MimeTypes
 import org.matrix.android.sdk.api.util.Optional
 import org.matrix.android.sdk.internal.session.content.FileUploader
 import org.matrix.android.sdk.internal.session.room.alias.AddRoomAliasTask
@@ -137,7 +138,7 @@ internal class DefaultStateService @AssistedInject constructor(@Assisted private
     }
 
     override suspend fun updateAvatar(avatarUri: Uri, fileName: String) {
-        val response = fileUploader.uploadFromUri(avatarUri, fileName, "image/jpeg")
+        val response = fileUploader.uploadFromUri(avatarUri, fileName, MimeTypes.Jpeg)
         sendStateEvent(
                 eventType = EventType.STATE_ROOM_AVATAR,
                 body = mapOf("url" to response.contentUri),

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/job/SyncThread.kt

@@ -25,7 +25,6 @@ import org.matrix.android.sdk.api.failure.isTokenError
 import org.matrix.android.sdk.api.session.sync.SyncState
 import org.matrix.android.sdk.internal.network.NetworkConnectivityChecker
 import org.matrix.android.sdk.internal.session.sync.SyncTask
-import org.matrix.android.sdk.internal.session.typing.DefaultTypingUsersTracker
 import org.matrix.android.sdk.internal.util.BackgroundDetectionObserver
 import org.matrix.android.sdk.internal.util.Debouncer
 import org.matrix.android.sdk.internal.util.createUIHandler
@@ -50,14 +49,13 @@ private const val RETRY_WAIT_TIME_MS = 10_000L
 private const val DEFAULT_LONG_POOL_TIMEOUT = 30_000L
 
 internal class SyncThread @Inject constructor(private val syncTask: SyncTask,
-                                              private val typingUsersTracker: DefaultTypingUsersTracker,
                                               private val networkConnectivityChecker: NetworkConnectivityChecker,
                                               private val backgroundDetectionObserver: BackgroundDetectionObserver,
                                               private val activeCallHandler: ActiveCallHandler
 ) : Thread("SyncThread"), NetworkConnectivityChecker.Listener, BackgroundDetectionObserver.Listener {
 
     private var state: SyncState = SyncState.Idle
-    private var liveState = MutableLiveData<SyncState>(state)
+    private var liveState = MutableLiveData(state)
     private val lock = Object()
     private val syncScope = CoroutineScope(SupervisorJob())
     private val debouncer = Debouncer(createUIHandler())
@@ -231,7 +229,7 @@ internal class SyncThread @Inject constructor(private val syncTask: SyncTask,
             return
         }
         state = newState
-        debouncer.debounce("post_state", Runnable {
+        debouncer.debounce("post_state", {
             liveState.value = newState
         }, 150)
     }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/util/FileSaver.kt

@@ -25,6 +25,9 @@ import java.io.InputStream
  */
 @WorkerThread
 fun writeToFile(inputStream: InputStream, outputFile: File) {
+    // Ensure the parent folder exists, else it will crash
+    outputFile.parentFile?.mkdirs()
+
     outputFile.outputStream().use {
         inputStream.copyTo(it)
     }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/util/LruCache.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.util
+
+import androidx.collection.LruCache
+
+@Suppress("NULLABLE_TYPE_PARAMETER_AGAINST_NOT_NULL_TYPE_PARAMETER")
+internal inline fun <K, V> LruCache<K, V>.getOrPut(key: K, defaultValue: () -> V): V {
+    return get(key) ?: defaultValue().also { put(key, it) }
+}

vector/build.gradle

@@ -440,6 +440,10 @@ dependencies {
     implementation 'com.google.zxing:core:3.3.3'
     implementation 'me.dm7.barcodescanner:zxing:1.9.13'
 
+    // Emoji Keyboard
+    implementation 'com.vanniktech:emoji-material:0.7.0'
+    implementation 'com.vanniktech:emoji-google:0.7.0'
+
     // TESTS
     testImplementation 'junit:junit:4.13'
     testImplementation "org.amshove.kluent:kluent-android:$kluent_version"

vector/src/main/assets/open_source_licenses.html

@@ -347,11 +347,6 @@ SOFTWARE.
         <br/>
         Copyright 2017 Gabriel Ittner.
     </li>
-    <li>
-        <b>Android-multipicker-library</b>
-        <br/>
-        Copyright 2018 Kumar Bibek
-    </li>
     <li>
         <b>htmlcompressor</b>
         <br/>
@@ -390,6 +385,11 @@ SOFTWARE.
         <br/>
         Copyright 2018, Aleksandr Nikiforov
     </li>
+    <li>
+        <b>Emoji</b>
+        <br/>
+        Copyright (C) 2016 - Niklas Baudy, Ruben Gees, Mario Đanić and contributors
+    </li>
 </ul>
 <pre>
 Apache License

vector/src/main/java/im/vector/app/VectorApplication.kt

@@ -36,6 +36,8 @@ import com.airbnb.epoxy.EpoxyAsyncUtil
 import com.airbnb.epoxy.EpoxyController
 import com.facebook.stetho.Stetho
 import com.gabrielittner.threetenbp.LazyThreeTen
+import com.vanniktech.emoji.EmojiManager
+import com.vanniktech.emoji.google.GoogleEmojiProvider
 import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.di.DaggerVectorComponent
 import im.vector.app.core.di.HasVectorInjector
@@ -184,6 +186,8 @@ class VectorApplication :
             addAction(Intent.ACTION_SCREEN_OFF)
             addAction(Intent.ACTION_SCREEN_ON)
         })
+
+        EmojiManager.install(GoogleEmojiProvider())
     }
 
     private fun enableStrictModeIfNeeded() {

vector/src/main/java/im/vector/app/core/glide/VectorGlideModelLoader.kt

@@ -28,7 +28,6 @@ import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.features.media.ImageContentRenderer
 import okhttp3.OkHttpClient
 import org.matrix.android.sdk.api.MatrixCallback
-import org.matrix.android.sdk.api.session.file.FileService
 import timber.log.Timber
 import java.io.File
 import java.io.IOException
@@ -110,11 +109,9 @@ class VectorGlideDataFetcher(private val activeSessionHolder: ActiveSessionHolde
         }
         // Use the file vector service, will avoid flickering and redownload after upload
         fileService.downloadFile(
-                downloadMode = FileService.DownloadMode.FOR_INTERNAL_USE,
-                mimeType = data.mimeType,
-                id = data.eventId,
-                url = data.url,
                 fileName = data.filename,
+                mimeType = data.mimeType,
+                url = data.url,
                 elementToDecrypt = data.elementToDecrypt,
                 callback = object : MatrixCallback<File> {
                     override fun onSuccess(data: File) {

vector/src/main/java/im/vector/app/core/resources/ResourceUtils.kt

@@ -20,17 +20,11 @@ import android.content.Context
 import android.net.Uri
 import android.webkit.MimeTypeMap
 import im.vector.app.core.utils.getFileExtension
+import org.matrix.android.sdk.api.util.MimeTypes
+import org.matrix.android.sdk.api.util.MimeTypes.normalizeMimeType
 import timber.log.Timber
 import java.io.InputStream
 
-/**
- * Mime types
- */
-const val MIME_TYPE_JPEG = "image/jpeg"
-const val MIME_TYPE_JPG = "image/jpg"
-const val MIME_TYPE_IMAGE_ALL = "image/*"
-const val MIME_TYPE_ALL_CONTENT = "*/*"
-
 data class Resource(
         var mContentStream: InputStream? = null,
         var mMimeType: String? = null
@@ -55,7 +49,7 @@ data class Resource(
      * @return true if the opened resource is a jpeg one.
      */
     fun isJpegResource(): Boolean {
-        return MIME_TYPE_JPEG == mMimeType || MIME_TYPE_JPG == mMimeType
+        return mMimeType.normalizeMimeType() == MimeTypes.Jpeg
     }
 }
 

vector/src/main/java/im/vector/app/core/ui/views/JumpToReadMarkerView.kt

@@ -1,19 +1,17 @@
 /*
-
-  * Copyright 2019 New Vector Ltd
-  *
-  * Licensed under the Apache License, Version 2.0 (the "License");
-  * you may not use this file except in compliance with the License.
-  * You may obtain a copy of the License at
-  *
-  *     http://www.apache.org/licenses/LICENSE-2.0
-  *
-  * Unless required by applicable law or agreed to in writing, software
-  * distributed under the License is distributed on an "AS IS" BASIS,
-  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  * See the License for the specific language governing permissions and
-  * limitations under the License.
-
+ * Copyright 2019 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package im.vector.app.core.ui.views

vector/src/main/java/im/vector/app/core/utils/Debouncer.kt

@@ -1,19 +1,17 @@
 /*
-
-  * Copyright 2019 New Vector Ltd
-  *
-  * Licensed under the Apache License, Version 2.0 (the "License");
-  * you may not use this file except in compliance with the License.
-  * You may obtain a copy of the License at
-  *
-  *     http://www.apache.org/licenses/LICENSE-2.0
-  *
-  * Unless required by applicable law or agreed to in writing, software
-  * distributed under the License is distributed on an "AS IS" BASIS,
-  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  * See the License for the specific language governing permissions and
-  * limitations under the License.
-
+ * Copyright 2019 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 package im.vector.app.core.utils
 

vector/src/main/java/im/vector/app/core/utils/ExternalApplicationsUtil.kt

@@ -48,6 +48,10 @@ import okio.buffer
 import okio.sink
 import okio.source
 import org.matrix.android.sdk.api.extensions.tryOrNull
+import org.matrix.android.sdk.api.util.MimeTypes
+import org.matrix.android.sdk.api.util.MimeTypes.isMimeTypeAudio
+import org.matrix.android.sdk.api.util.MimeTypes.isMimeTypeImage
+import org.matrix.android.sdk.api.util.MimeTypes.isMimeTypeVideo
 import timber.log.Timber
 import java.io.File
 import java.io.FileInputStream
@@ -138,7 +142,7 @@ fun openFileSelection(activity: Activity,
     fileIntent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, allowMultipleSelection)
 
     fileIntent.addCategory(Intent.CATEGORY_OPENABLE)
-    fileIntent.type = "*/*"
+    fileIntent.type = MimeTypes.Any
 
     try {
         activityResultLauncher
@@ -182,7 +186,7 @@ fun openCamera(activity: Activity, titlePrefix: String, requestCode: Int): Strin
     // The Galaxy S not only requires the name of the file to output the image to, but will also not
     // set the mime type of the picture it just took (!!!). We assume that the Galaxy S takes image/jpegs
     // so the attachment uploader doesn't freak out about there being no mimetype in the content database.
-    values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg")
+    values.put(MediaStore.Images.Media.MIME_TYPE, MimeTypes.Jpeg)
     var dummyUri: Uri? = null
     try {
         dummyUri = activity.contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)
@@ -344,10 +348,10 @@ fun saveMedia(context: Context, file: File, title: String, mediaMimeType: String
             put(MediaStore.Images.Media.DATE_TAKEN, System.currentTimeMillis())
         }
         val externalContentUri = when {
-            mediaMimeType?.startsWith("image/") == true -> MediaStore.Images.Media.EXTERNAL_CONTENT_URI
-            mediaMimeType?.startsWith("video/") == true -> MediaStore.Video.Media.EXTERNAL_CONTENT_URI
-            mediaMimeType?.startsWith("audio/") == true -> MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
-            else                                        -> MediaStore.Downloads.EXTERNAL_CONTENT_URI
+            mediaMimeType?.isMimeTypeImage() == true -> MediaStore.Images.Media.EXTERNAL_CONTENT_URI
+            mediaMimeType?.isMimeTypeVideo() == true -> MediaStore.Video.Media.EXTERNAL_CONTENT_URI
+            mediaMimeType?.isMimeTypeAudio() == true -> MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
+            else                                     -> MediaStore.Downloads.EXTERNAL_CONTENT_URI
         }
 
         val uri = context.contentResolver.insert(externalContentUri, values)
@@ -365,7 +369,7 @@ fun saveMedia(context: Context, file: File, title: String, mediaMimeType: String
             notificationUtils.buildDownloadFileNotification(
                     uri,
                     filename,
-                    mediaMimeType ?: "application/octet-stream"
+                    mediaMimeType ?: MimeTypes.OctetStream
             ).let { notification ->
                 notificationUtils.showNotificationMessage("DL", uri.hashCode(), notification)
             }
@@ -385,10 +389,10 @@ private fun saveMediaLegacy(context: Context, mediaMimeType: String?, title: Str
 
     GlobalScope.launch(Dispatchers.IO) {
         val dest = when {
-            mediaMimeType?.startsWith("image/") == true -> Environment.DIRECTORY_PICTURES
-            mediaMimeType?.startsWith("video/") == true -> Environment.DIRECTORY_MOVIES
-            mediaMimeType?.startsWith("audio/") == true -> Environment.DIRECTORY_MUSIC
-            else                                        -> Environment.DIRECTORY_DOWNLOADS
+            mediaMimeType?.isMimeTypeImage() == true -> Environment.DIRECTORY_PICTURES
+            mediaMimeType?.isMimeTypeVideo() == true -> Environment.DIRECTORY_MOVIES
+            mediaMimeType?.isMimeTypeAudio() == true -> Environment.DIRECTORY_MUSIC
+            else                                     -> Environment.DIRECTORY_DOWNLOADS
         }
         val downloadDir = Environment.getExternalStoragePublicDirectory(dest)
         try {
@@ -405,7 +409,7 @@ private fun saveMediaLegacy(context: Context, mediaMimeType: String?, title: Str
                         savedFile.name,
                         title,
                         true,
-                        mediaMimeType ?: "application/octet-stream",
+                        mediaMimeType ?: MimeTypes.OctetStream,
                         savedFile.absolutePath,
                         savedFile.length(),
                         true)

vector/src/main/java/im/vector/app/core/utils/Handler.kt

@@ -1,19 +1,17 @@
 /*
-
-  * Copyright 2019 New Vector Ltd
-  *
-  * Licensed under the Apache License, Version 2.0 (the "License");
-  * you may not use this file except in compliance with the License.
-  * You may obtain a copy of the License at
-  *
-  *     http://www.apache.org/licenses/LICENSE-2.0
-  *
-  * Unless required by applicable law or agreed to in writing, software
-  * distributed under the License is distributed on an "AS IS" BASIS,
-  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  * See the License for the specific language governing permissions and
-  * limitations under the License.
-
+ * Copyright 2019 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package im.vector.app.core.utils

vector/src/main/java/im/vector/app/features/attachments/AttachmentsMapper.kt

@@ -23,6 +23,9 @@ import im.vector.lib.multipicker.entity.MultiPickerFileType
 import im.vector.lib.multipicker.entity.MultiPickerImageType
 import im.vector.lib.multipicker.entity.MultiPickerVideoType
 import org.matrix.android.sdk.api.session.content.ContentAttachmentData
+import org.matrix.android.sdk.api.util.MimeTypes.isMimeTypeAudio
+import org.matrix.android.sdk.api.util.MimeTypes.isMimeTypeImage
+import org.matrix.android.sdk.api.util.MimeTypes.isMimeTypeVideo
 import timber.log.Timber
 
 fun MultiPickerContactType.toContactAttachment(): ContactAttachment {
@@ -59,10 +62,10 @@ fun MultiPickerAudioType.toContentAttachmentData(): ContentAttachmentData {
 
 private fun MultiPickerBaseType.mapType(): ContentAttachmentData.Type {
     return when {
-        mimeType?.startsWith("image/") == true -> ContentAttachmentData.Type.IMAGE
-        mimeType?.startsWith("video/") == true -> ContentAttachmentData.Type.VIDEO
-        mimeType?.startsWith("audio/") == true -> ContentAttachmentData.Type.AUDIO
-        else                                   -> ContentAttachmentData.Type.FILE
+        mimeType?.isMimeTypeImage() == true -> ContentAttachmentData.Type.IMAGE
+        mimeType?.isMimeTypeVideo() == true -> ContentAttachmentData.Type.VIDEO
+        mimeType?.isMimeTypeAudio() == true -> ContentAttachmentData.Type.AUDIO
+        else                                -> ContentAttachmentData.Type.FILE
     }
 }
 

vector/src/main/java/im/vector/app/features/attachments/ContentAttachmentData.kt

@@ -17,11 +17,19 @@
 package im.vector.app.features.attachments
 
 import org.matrix.android.sdk.api.session.content.ContentAttachmentData
+import org.matrix.android.sdk.api.util.MimeTypes
+
+private val listOfPreviewableMimeTypes = listOf(
+        MimeTypes.Jpeg,
+        MimeTypes.BadJpg,
+        MimeTypes.Png,
+        MimeTypes.Gif
+)
 
 fun ContentAttachmentData.isPreviewable(): Boolean {
     // For now the preview only supports still image
     return type == ContentAttachmentData.Type.IMAGE
-            && listOf("image/jpeg", "image/png", "image/jpg").contains(getSafeMimeType() ?: "")
+            && listOfPreviewableMimeTypes.contains(getSafeMimeType() ?: "")
 }
 
 data class GroupedContentAttachmentData(

vector/src/main/java/im/vector/app/features/attachments/preview/Extensions.kt

@@ -17,12 +17,14 @@
 package im.vector.app.features.attachments.preview
 
 import org.matrix.android.sdk.api.session.content.ContentAttachmentData
+import org.matrix.android.sdk.api.util.MimeTypes
+import org.matrix.android.sdk.api.util.MimeTypes.isMimeTypeImage
 
 /**
  * All images are editable, expect Gif
  */
 fun ContentAttachmentData.isEditable(): Boolean {
     return type == ContentAttachmentData.Type.IMAGE
-            && getSafeMimeType()?.startsWith("image/") == true
-            && getSafeMimeType() != "image/gif"
+            && getSafeMimeType()?.isMimeTypeImage() == true
+            && getSafeMimeType() != MimeTypes.Gif
 }

vector/src/main/java/im/vector/app/features/home/HomeActivityViewModel.kt

@@ -71,12 +71,18 @@ class HomeActivityViewModel @AssistedInject constructor(
     private var onceTrusted = false
 
     init {
+        cleanupFiles()
         observeInitialSync()
         mayBeInitializeCrossSigning()
         checkSessionPushIsOn()
         observeCrossSigningReset()
     }
 
+    private fun cleanupFiles() {
+        // Mitigation: delete all cached decrypted files each time the application is started.
+        activeSessionHolder.getSafeActiveSession()?.fileService()?.clearDecryptedCache()
+    }
+
     private fun observeCrossSigningReset() {
         val safeActiveSession = activeSessionHolder.getSafeActiveSession() ?: return
 

vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailAction.kt

@@ -98,4 +98,7 @@ sealed class RoomDetailAction : VectorViewModelAction {
     data class SetAvatarAction(val newAvatarUri: Uri, val newAvatarFileName: String) : RoomDetailAction()
     object QuickActionSetTopic : RoomDetailAction()
     data class ShowRoomAvatarFullScreen(val matrixItem: MatrixItem?, val transitionView: View?) : RoomDetailAction()
+
+    // Preview URL
+    data class DoNotShowPreviewUrlFor(val eventId: String, val url: String) : RoomDetailAction()
 }

vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailFragment.kt

@@ -53,7 +53,6 @@ import androidx.lifecycle.Observer
 import androidx.recyclerview.widget.ItemTouchHelper
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
-import butterknife.BindView
 import com.airbnb.epoxy.EpoxyModel
 import com.airbnb.epoxy.OnModelBuildFinishedListener
 import com.airbnb.epoxy.addGlidePreloader
@@ -69,6 +68,7 @@ import com.airbnb.mvrx.withState
 import com.google.android.material.snackbar.Snackbar
 import com.google.android.material.textfield.TextInputEditText
 import com.jakewharton.rxbinding3.widget.textChanges
+import com.vanniktech.emoji.EmojiPopup
 import im.vector.app.R
 import im.vector.app.core.dialogs.ConfirmationDialogBuilder
 import im.vector.app.core.dialogs.GalleryOrCameraDialogHelper
@@ -140,6 +140,7 @@ import im.vector.app.features.home.room.detail.timeline.item.MessageInformationD
 import im.vector.app.features.home.room.detail.timeline.item.MessageTextItem
 import im.vector.app.features.home.room.detail.timeline.item.ReadReceiptData
 import im.vector.app.features.home.room.detail.timeline.reactions.ViewReactionsBottomSheet
+import im.vector.app.features.home.room.detail.timeline.url.PreviewUrlRetriever
 import im.vector.app.features.home.room.detail.widget.RoomWidgetsBottomSheet
 import im.vector.app.features.html.EventHtmlRenderer
 import im.vector.app.features.html.PillImageSpan
@@ -165,7 +166,7 @@ import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.schedulers.Schedulers
 import kotlinx.android.parcel.Parcelize
 import kotlinx.android.synthetic.main.fragment_room_detail.*
-import kotlinx.android.synthetic.main.merge_composer_layout.view.*
+import kotlinx.android.synthetic.main.composer_layout.view.*
 import kotlinx.android.synthetic.main.merge_overlay_waiting_view.*
 import org.billcarsonfr.jsonviewer.JSonViewerDialog
 import org.commonmark.parser.Parser
@@ -174,7 +175,6 @@ import org.matrix.android.sdk.api.session.Session
 import org.matrix.android.sdk.api.session.content.ContentAttachmentData
 import org.matrix.android.sdk.api.session.events.model.Event
 import org.matrix.android.sdk.api.session.events.model.toModel
-import org.matrix.android.sdk.api.session.file.FileService
 import org.matrix.android.sdk.api.session.room.model.Membership
 import org.matrix.android.sdk.api.session.room.model.RoomSummary
 import org.matrix.android.sdk.api.session.room.model.message.MessageContent
@@ -185,7 +185,6 @@ import org.matrix.android.sdk.api.session.room.model.message.MessageTextContent
 import org.matrix.android.sdk.api.session.room.model.message.MessageVerificationRequestContent
 import org.matrix.android.sdk.api.session.room.model.message.MessageVideoContent
 import org.matrix.android.sdk.api.session.room.model.message.MessageWithAttachmentContent
-import org.matrix.android.sdk.api.session.room.model.message.getFileUrl
 import org.matrix.android.sdk.api.session.room.send.SendState
 import org.matrix.android.sdk.api.session.room.timeline.Timeline
 import org.matrix.android.sdk.api.session.room.timeline.TimelineEvent
@@ -194,7 +193,6 @@ import org.matrix.android.sdk.api.session.widgets.model.Widget
 import org.matrix.android.sdk.api.session.widgets.model.WidgetType
 import org.matrix.android.sdk.api.util.MatrixItem
 import org.matrix.android.sdk.api.util.toMatrixItem
-import org.matrix.android.sdk.internal.crypto.attachments.toElementToDecrypt
 import org.matrix.android.sdk.internal.crypto.model.event.EncryptedEventContent
 import org.matrix.android.sdk.internal.crypto.model.event.WithHeldCode
 import timber.log.Timber
@@ -289,8 +287,6 @@ class RoomDetailFragment @Inject constructor(
     private lateinit var attachmentsHelper: AttachmentsHelper
     private lateinit var keyboardStateUtils: KeyboardStateUtils
 
-    @BindView(R.id.composerLayout)
-    lateinit var composerLayout: TextComposerView
     private lateinit var attachmentTypeSelector: AttachmentTypeSelectorView
 
     private var lockSendButton = false
@@ -311,6 +307,7 @@ class RoomDetailFragment @Inject constructor(
         setupActiveCallView()
         setupJumpToBottomView()
         setupConfBannerView()
+        setupEmojiPopup()
 
         roomToolbarContentView.debouncedClicks {
             navigator.openRoomProfile(requireActivity(), roomDetailArgs.roomId)
@@ -478,6 +475,20 @@ class RoomDetailFragment @Inject constructor(
         }
     }
 
+    private fun setupEmojiPopup() {
+        val emojiPopup = EmojiPopup
+                .Builder
+                .fromRootView(rootConstraintLayout)
+                .setKeyboardAnimationStyle(R.style.emoji_fade_animation_style)
+                .setOnEmojiPopupShownListener { composerLayout?.composerEmojiButton?.setImageResource(R.drawable.ic_keyboard) }
+                .setOnEmojiPopupDismissListener { composerLayout?.composerEmojiButton?.setImageResource(R.drawable.ic_insert_emoji) }
+                .build(composerLayout.composerEditText)
+
+        composerLayout.composerEmojiButton.debouncedClicks {
+            emojiPopup.toggle()
+        }
+    }
+
     private fun joinJitsiRoom(jitsiWidget: Widget, enableVideo: Boolean) {
         navigator.openRoomWidget(requireContext(), roomDetailArgs.roomId, jitsiWidget, mapOf(JitsiCallViewModel.ENABLE_VIDEO_OPTION to enableVideo))
     }
@@ -1090,18 +1101,6 @@ class RoomDetailFragment @Inject constructor(
         }
     }
 
-    private val writingFileActivityResultLauncher = registerForPermissionsResult { allGranted ->
-        if (allGranted) {
-            val pendingUri = roomDetailViewModel.pendingUri
-            if (pendingUri != null) {
-                roomDetailViewModel.pendingUri = null
-                sendUri(pendingUri)
-            }
-        } else {
-            cleanUpAfterPermissionNotGranted()
-        }
-    }
-
     private fun setupComposer() {
         val composerEditText = composerLayout.composerEditText
         autoCompleter.setup(composerEditText)
@@ -1147,14 +1146,7 @@ class RoomDetailFragment @Inject constructor(
             }
 
             override fun onRichContentSelected(contentUri: Uri): Boolean {
-                // We need WRITE_EXTERNAL permission
-                return if (checkPermissions(PERMISSIONS_FOR_WRITING_FILES, requireActivity(), writingFileActivityResultLauncher)) {
-                    sendUri(contentUri)
-                } else {
-                    roomDetailViewModel.pendingUri = contentUri
-                    // Always intercept when we request some permission
-                    true
-                }
+                return sendUri(contentUri)
             }
         }
     }
@@ -1185,11 +1177,9 @@ class RoomDetailFragment @Inject constructor(
     }
 
     private fun sendUri(uri: Uri): Boolean {
-        roomDetailViewModel.preventAttachmentPreview = true
         val shareIntent = Intent(Intent.ACTION_SEND, uri)
         val isHandled = attachmentsHelper.handleShareIntent(requireContext(), shareIntent)
         if (!isHandled) {
-            roomDetailViewModel.preventAttachmentPreview = false
             Toast.makeText(requireContext(), R.string.error_handling_incoming_share, Toast.LENGTH_SHORT).show()
         }
         return isHandled
@@ -1211,9 +1201,6 @@ class RoomDetailFragment @Inject constructor(
             scrollOnHighlightedEventCallback.timeline = roomDetailViewModel.timeline
             timelineEventController.update(state)
             inviteView.visibility = View.GONE
-            val uid = session.myUserId
-            val meMember = state.myRoomMember()
-            avatarRenderer.render(MatrixItem.UserItem(uid, meMember?.displayName, meMember?.avatarUrl), composerLayout.composerAvatarImageView)
             if (state.tombstoneEvent == null) {
                 if (state.canSendMessage) {
                     composerLayout.visibility = View.VISIBLE
@@ -1554,7 +1541,6 @@ class RoomDetailFragment @Inject constructor(
     private fun cleanUpAfterPermissionNotGranted() {
         // Reset all pending data
         roomDetailViewModel.pendingAction = null
-        roomDetailViewModel.pendingUri = null
         attachmentsHelper.pendingType = null
     }
 
@@ -1630,6 +1616,10 @@ class RoomDetailFragment @Inject constructor(
         roomDetailViewModel.handle(itemAction)
     }
 
+    override fun getPreviewUrlRetriever(): PreviewUrlRetriever {
+        return roomDetailViewModel.previewUrlRetriever
+    }
+
     override fun onRoomCreateLinkClicked(url: String) {
         permalinkHandler
                 .launch(requireContext(), url, object : NavigationInterceptor {
@@ -1652,17 +1642,20 @@ class RoomDetailFragment @Inject constructor(
         roomDetailViewModel.handle(RoomDetailAction.EnterTrackingUnreadMessagesState)
     }
 
+    override fun onPreviewUrlClicked(url: String) {
+        onUrlClicked(url, url)
+    }
+
+    override fun onPreviewUrlCloseClicked(eventId: String, url: String) {
+        roomDetailViewModel.handle(RoomDetailAction.DoNotShowPreviewUrlFor(eventId, url))
+    }
+
     private fun onShareActionClicked(action: EventSharedAction.Share) {
         if (action.messageContent is MessageTextContent) {
             shareText(requireContext(), action.messageContent.body)
         } else if (action.messageContent is MessageWithAttachmentContent) {
             session.fileService().downloadFile(
-                    downloadMode = FileService.DownloadMode.FOR_EXTERNAL_SHARE,
-                    id = action.eventId,
-                    fileName = action.messageContent.body,
-                    mimeType = action.messageContent.mimeType,
-                    url = action.messageContent.getFileUrl(),
-                    elementToDecrypt = action.messageContent.encryptedFileInfo?.toElementToDecrypt(),
+                    messageContent = action.messageContent,
                     callback = object : MatrixCallback<File> {
                         override fun onSuccess(data: File) {
                             if (isAdded) {
@@ -1692,12 +1685,7 @@ class RoomDetailFragment @Inject constructor(
             return
         }
         session.fileService().downloadFile(
-                downloadMode = FileService.DownloadMode.FOR_EXTERNAL_SHARE,
-                id = action.eventId,
-                fileName = action.messageContent.body,
-                mimeType = action.messageContent.mimeType,
-                url = action.messageContent.getFileUrl(),
-                elementToDecrypt = action.messageContent.encryptedFileInfo?.toElementToDecrypt(),
+                messageContent = action.messageContent,
                 callback = object : MatrixCallback<File> {
                     override fun onSuccess(data: File) {
                         if (isAdded) {
@@ -1959,24 +1947,18 @@ class RoomDetailFragment @Inject constructor(
 // AttachmentsHelper.Callback
 
     override fun onContentAttachmentsReady(attachments: List<ContentAttachmentData>) {
-        if (roomDetailViewModel.preventAttachmentPreview) {
-            roomDetailViewModel.preventAttachmentPreview = false
-            roomDetailViewModel.handle(RoomDetailAction.SendMedia(attachments, false))
-        } else {
-            val grouped = attachments.toGroupedContentAttachmentData()
-            if (grouped.notPreviewables.isNotEmpty()) {
-                // Send the not previewable attachments right now (?)
-                roomDetailViewModel.handle(RoomDetailAction.SendMedia(grouped.notPreviewables, false))
-            }
-            if (grouped.previewables.isNotEmpty()) {
-                val intent = AttachmentsPreviewActivity.newIntent(requireContext(), AttachmentsPreviewArgs(grouped.previewables))
-                contentAttachmentActivityResultLauncher.launch(intent)
-            }
+        val grouped = attachments.toGroupedContentAttachmentData()
+        if (grouped.notPreviewables.isNotEmpty()) {
+            // Send the not previewable attachments right now (?)
+            roomDetailViewModel.handle(RoomDetailAction.SendMedia(grouped.notPreviewables, false))
+        }
+        if (grouped.previewables.isNotEmpty()) {
+            val intent = AttachmentsPreviewActivity.newIntent(requireContext(), AttachmentsPreviewArgs(grouped.previewables))
+            contentAttachmentActivityResultLauncher.launch(intent)
         }
     }
 
     override fun onAttachmentsProcessFailed() {
-        roomDetailViewModel.preventAttachmentPreview = false
         Toast.makeText(requireContext(), R.string.error_attachment, Toast.LENGTH_SHORT).show()
     }
 

vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailViewModel.kt

@@ -40,6 +40,7 @@ import im.vector.app.features.home.room.detail.composer.rainbow.RainbowGenerator
 import im.vector.app.features.home.room.detail.sticker.StickerPickerActionHandler
 import im.vector.app.features.home.room.detail.timeline.helper.RoomSummaryHolder
 import im.vector.app.features.home.room.detail.timeline.helper.TimelineSettingsFactory
+import im.vector.app.features.home.room.detail.timeline.url.PreviewUrlRetriever
 import im.vector.app.features.home.room.typing.TypingHelper
 import im.vector.app.features.powerlevel.PowerLevelsObservableFactory
 import im.vector.app.features.raw.wellknown.getElementWellknown
@@ -69,7 +70,6 @@ import org.matrix.android.sdk.api.session.events.model.isAttachmentMessage
 import org.matrix.android.sdk.api.session.events.model.isTextMessage
 import org.matrix.android.sdk.api.session.events.model.toContent
 import org.matrix.android.sdk.api.session.events.model.toModel
-import org.matrix.android.sdk.api.session.file.FileService
 import org.matrix.android.sdk.api.session.homeserver.HomeServerCapabilities
 import org.matrix.android.sdk.api.session.room.members.ChangeMembershipState
 import org.matrix.android.sdk.api.session.room.members.roomMemberQueryParams
@@ -80,7 +80,6 @@ import org.matrix.android.sdk.api.session.room.model.RoomSummary
 import org.matrix.android.sdk.api.session.room.model.message.MessageContent
 import org.matrix.android.sdk.api.session.room.model.message.MessageType
 import org.matrix.android.sdk.api.session.room.model.message.OptionItem
-import org.matrix.android.sdk.api.session.room.model.message.getFileName
 import org.matrix.android.sdk.api.session.room.model.message.getFileUrl
 import org.matrix.android.sdk.api.session.room.model.tombstone.RoomTombstoneContent
 import org.matrix.android.sdk.api.session.room.powerlevels.PowerLevelsHelper
@@ -92,7 +91,6 @@ import org.matrix.android.sdk.api.session.room.timeline.getTextEditableContent
 import org.matrix.android.sdk.api.session.widgets.model.Widget
 import org.matrix.android.sdk.api.session.widgets.model.WidgetType
 import org.matrix.android.sdk.api.util.toOptional
-import org.matrix.android.sdk.internal.crypto.attachments.toElementToDecrypt
 import org.matrix.android.sdk.internal.crypto.model.event.EncryptedEventContent
 import org.matrix.android.sdk.internal.crypto.model.event.WithHeldCode
 import org.matrix.android.sdk.internal.util.awaitCallback
@@ -128,15 +126,12 @@ class RoomDetailViewModel @AssistedInject constructor(
     private var timelineEvents = PublishRelay.create<List<TimelineEvent>>()
     val timeline = room.createTimeline(eventId, timelineSettings)
 
+    // Same lifecycle than the ViewModel (survive to screen rotation)
+    val previewUrlRetriever = PreviewUrlRetriever(session)
+
     // Slot to keep a pending action during permission request
     var pendingAction: RoomDetailAction? = null
 
-    // Slot to keep a pending uri during permission request
-    var pendingUri: Uri? = null
-
-    // Slot to store if we want to prevent preview of attachment
-    var preventAttachmentPreview = false
-
     private var trackUnreadMessages = AtomicBoolean(false)
     private var mostRecentDisplayedEvent: TimelineEvent? = null
 
@@ -286,9 +281,14 @@ class RoomDetailViewModel @AssistedInject constructor(
                         RoomDetailViewEvents.ShowRoomAvatarFullScreen(action.matrixItem, action.transitionView)
                 )
             }
+            is RoomDetailAction.DoNotShowPreviewUrlFor           -> handleDoNotShowPreviewUrlFor(action)
         }.exhaustive
     }
 
+    private fun handleDoNotShowPreviewUrlFor(action: RoomDetailAction.DoNotShowPreviewUrlFor) {
+        previewUrlRetriever.doNotShowPreviewUrlFor(action.eventId, action.url)
+    }
+
     private fun handleSetNewAvatar(action: RoomDetailAction.SetAvatarAction) {
         viewModelScope.launch(Dispatchers.IO) {
             try {
@@ -1021,10 +1021,10 @@ class RoomDetailViewModel @AssistedInject constructor(
     }
 
     private fun handleOpenOrDownloadFile(action: RoomDetailAction.DownloadOrOpen) {
-        val mxcUrl = action.messageFileContent.getFileUrl()
+        val mxcUrl = action.messageFileContent.getFileUrl() ?: return
         val isLocalSendingFile = action.senderId == session.myUserId
-                && mxcUrl?.startsWith("content://") ?: false
-        val isDownloaded = mxcUrl?.let { session.fileService().isFileInCache(it, action.messageFileContent.mimeType) } ?: false
+                && mxcUrl.startsWith("content://")
+        val isDownloaded = session.fileService().isFileInCache(action.messageFileContent)
         if (isLocalSendingFile) {
             tryOrNull { Uri.parse(mxcUrl) }?.let {
                 _viewEvents.post(RoomDetailViewEvents.OpenFile(
@@ -1035,7 +1035,7 @@ class RoomDetailViewModel @AssistedInject constructor(
             }
         } else if (isDownloaded) {
             // we can open it
-            session.fileService().getTemporarySharableURI(mxcUrl!!, action.messageFileContent.mimeType)?.let { uri ->
+            session.fileService().getTemporarySharableURI(action.messageFileContent)?.let { uri ->
                 _viewEvents.post(RoomDetailViewEvents.OpenFile(
                         action.messageFileContent.mimeType,
                         uri,
@@ -1044,12 +1044,7 @@ class RoomDetailViewModel @AssistedInject constructor(
             }
         } else {
             session.fileService().downloadFile(
-                    downloadMode = FileService.DownloadMode.FOR_INTERNAL_USE,
-                    id = action.eventId,
-                    fileName = action.messageFileContent.getFileName(),
-                    mimeType = action.messageFileContent.mimeType,
-                    url = mxcUrl,
-                    elementToDecrypt = action.messageFileContent.encryptedFileInfo?.toElementToDecrypt(),
+                    messageContent = action.messageFileContent,
                     callback = object : MatrixCallback<File> {
                         override fun onSuccess(data: File) {
                             _viewEvents.post(RoomDetailViewEvents.DownloadFileState(
@@ -1361,6 +1356,17 @@ class RoomDetailViewModel @AssistedInject constructor(
 
     override fun onTimelineUpdated(snapshot: List<TimelineEvent>) {
         timelineEvents.accept(snapshot)
+
+        // PreviewUrl
+        if (vectorPreferences.showUrlPreviews()) {
+            withState { state ->
+                snapshot
+                        .takeIf { state.asyncRoomSummary.invoke()?.isEncrypted == false }
+                        ?.forEach {
+                            previewUrlRetriever.getPreviewUrl(it.root, viewModelScope)
+                        }
+            }
+        }
     }
 
     override fun onTimelineFailure(throwable: Throwable) {

vector/src/main/java/im/vector/app/features/home/room/detail/composer/ComposerEditText.kt

@@ -24,16 +24,16 @@ import android.text.Editable
 import android.util.AttributeSet
 import android.view.inputmethod.EditorInfo
 import android.view.inputmethod.InputConnection
-import androidx.appcompat.widget.AppCompatEditText
 import androidx.core.view.inputmethod.EditorInfoCompat
 import androidx.core.view.inputmethod.InputConnectionCompat
+import com.vanniktech.emoji.EmojiEditText
 import im.vector.app.core.extensions.ooi
 import im.vector.app.core.platform.SimpleTextWatcher
 import im.vector.app.features.html.PillImageSpan
 import timber.log.Timber
 
 class ComposerEditText @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = android.R.attr.editTextStyle)
-    : AppCompatEditText(context, attrs, defStyleAttr) {
+    : EmojiEditText(context, attrs, defStyleAttr) {
 
     interface Callback {
         fun onRichContentSelected(contentUri: Uri): Boolean

vector/src/main/java/im/vector/app/features/home/room/detail/composer/TextComposerView.kt

@@ -36,7 +36,7 @@ import androidx.transition.TransitionSet
 import butterknife.BindView
 import butterknife.ButterKnife
 import im.vector.app.R
-import kotlinx.android.synthetic.main.merge_composer_layout.view.*
+import kotlinx.android.synthetic.main.composer_layout.view.*
 import org.matrix.android.sdk.api.crypto.RoomEncryptionTrustLevel
 
 /**
@@ -72,8 +72,8 @@ class TextComposerView @JvmOverloads constructor(context: Context, attrs: Attrib
     @BindView(R.id.composerEditText)
     lateinit var composerEditText: ComposerEditText
 
-    @BindView(R.id.composer_avatar_view)
-    lateinit var composerAvatarImageView: ImageView
+    @BindView(R.id.composer_emoji)
+    lateinit var composerEmojiButton: ImageButton
 
     @BindView(R.id.composer_shield)
     lateinit var composerShieldImageView: ImageView
@@ -86,7 +86,7 @@ class TextComposerView @JvmOverloads constructor(context: Context, attrs: Attrib
         get() = composerEditText.text
 
     init {
-        inflate(context, R.layout.merge_composer_layout, this)
+        inflate(context, R.layout.composer_layout, this)
         ButterKnife.bind(this)
         collapse(false)
         composerEditText.callback = object : ComposerEditText.Callback {
@@ -110,20 +110,20 @@ class TextComposerView @JvmOverloads constructor(context: Context, attrs: Attrib
     }
 
     fun collapse(animate: Boolean = true, transitionComplete: (() -> Unit)? = null) {
-        if (currentConstraintSetId == R.layout.constraint_set_composer_layout_compact) {
+        if (currentConstraintSetId == R.layout.composer_layout_constraint_set_compact) {
             // ignore we good
             return
         }
-        currentConstraintSetId = R.layout.constraint_set_composer_layout_compact
+        currentConstraintSetId = R.layout.composer_layout_constraint_set_compact
         applyNewConstraintSet(animate, transitionComplete)
     }
 
     fun expand(animate: Boolean = true, transitionComplete: (() -> Unit)? = null) {
-        if (currentConstraintSetId == R.layout.constraint_set_composer_layout_expanded) {
+        if (currentConstraintSetId == R.layout.composer_layout_constraint_set_expanded) {
             // ignore we good
             return
         }
-        currentConstraintSetId = R.layout.constraint_set_composer_layout_expanded
+        currentConstraintSetId = R.layout.composer_layout_constraint_set_expanded
         applyNewConstraintSet(animate, transitionComplete)
     }
 

vector/src/main/java/im/vector/app/features/home/room/detail/timeline/TimelineEventController.kt

@@ -48,6 +48,7 @@ import im.vector.app.features.home.room.detail.timeline.item.DaySeparatorItem_
 import im.vector.app.features.home.room.detail.timeline.item.MessageInformationData
 import im.vector.app.features.home.room.detail.timeline.item.ReadReceiptData
 import im.vector.app.features.home.room.detail.timeline.item.TimelineReadMarkerItem_
+import im.vector.app.features.home.room.detail.timeline.url.PreviewUrlRetriever
 import im.vector.app.features.media.ImageContentRenderer
 import im.vector.app.features.media.VideoContentRenderer
 import im.vector.app.features.settings.VectorPreferences
@@ -76,7 +77,13 @@ class TimelineEventController @Inject constructor(private val dateFormatter: Vec
                                                   private val backgroundHandler: Handler
 ) : EpoxyController(backgroundHandler, backgroundHandler), Timeline.Listener, EpoxyController.Interceptor {
 
-    interface Callback : BaseCallback, ReactionPillCallback, AvatarCallback, UrlClickCallback, ReadReceiptsCallback {
+    interface Callback :
+            BaseCallback,
+            ReactionPillCallback,
+            AvatarCallback,
+            UrlClickCallback,
+            ReadReceiptsCallback,
+            PreviewUrlCallback {
         fun onLoadMore(direction: Timeline.Direction)
         fun onEventInvisible(event: TimelineEvent)
         fun onEventVisible(event: TimelineEvent)
@@ -91,6 +98,8 @@ class TimelineEventController @Inject constructor(private val dateFormatter: Vec
 
         // TODO move all callbacks to this?
         fun onTimelineItemAction(itemAction: RoomDetailAction)
+
+        fun getPreviewUrlRetriever(): PreviewUrlRetriever
     }
 
     interface ReactionPillCallback {
@@ -118,6 +127,11 @@ class TimelineEventController @Inject constructor(private val dateFormatter: Vec
         fun onUrlLongClicked(url: String): Boolean
     }
 
+    interface PreviewUrlCallback {
+        fun onPreviewUrlClicked(url: String)
+        fun onPreviewUrlCloseClicked(eventId: String, url: String)
+    }
+
     // Map eventId to adapter position
     private val adapterPositionMapping = HashMap<String, Int>()
     private val modelCache = arrayListOf<CacheItemData?>()

vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/EncryptedItemFactory.kt

@@ -82,10 +82,9 @@ class EncryptedItemFactory @Inject constructor(private val messageInformationDat
                         when (cryptoError) {
                             MXCryptoError.ErrorType.KEYS_WITHHELD -> {
                                 span {
-                                    apply {
-                                        drawableProvider.getDrawable(R.drawable.ic_forbidden, colorFromAttribute)?.let {
-                                            image(it, "baseline")
-                                        }
+                                    drawableProvider.getDrawable(R.drawable.ic_forbidden, colorFromAttribute)?.let {
+                                        image(it, "baseline")
+                                        +" "
                                     }
                                     span(stringProvider.getString(R.string.notice_crypto_unable_to_decrypt_final)) {
                                         textStyle = "italic"
@@ -95,10 +94,9 @@ class EncryptedItemFactory @Inject constructor(private val messageInformationDat
                             }
                             else                                  -> {
                                 span {
-                                    apply {
-                                        drawableProvider.getDrawable(R.drawable.ic_clock, colorFromAttribute)?.let {
-                                            image(it, "baseline")
-                                        }
+                                    drawableProvider.getDrawable(R.drawable.ic_clock, colorFromAttribute)?.let {
+                                        image(it, "baseline")
+                                        +" "
                                     }
                                     span(stringProvider.getString(R.string.notice_crypto_unable_to_decrypt_friendly)) {
                                         textStyle = "italic"

vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/MessageItemFactory.kt

@@ -84,9 +84,11 @@ import org.matrix.android.sdk.api.session.room.model.message.MessageVerification
 import org.matrix.android.sdk.api.session.room.model.message.MessageVideoContent
 import org.matrix.android.sdk.api.session.room.model.message.OPTION_TYPE_BUTTONS
 import org.matrix.android.sdk.api.session.room.model.message.OPTION_TYPE_POLL
+import org.matrix.android.sdk.api.session.room.model.message.getFileName
 import org.matrix.android.sdk.api.session.room.model.message.getFileUrl
 import org.matrix.android.sdk.api.session.room.timeline.TimelineEvent
 import org.matrix.android.sdk.api.session.room.timeline.getLastMessageContent
+import org.matrix.android.sdk.api.util.MimeTypes
 import org.matrix.android.sdk.internal.crypto.attachments.toElementToDecrypt
 import org.matrix.android.sdk.internal.crypto.model.event.EncryptedEventContent
 import javax.inject.Inject
@@ -144,16 +146,16 @@ class MessageItemFactory @Inject constructor(
 //        val all = event.root.toContent()
 //        val ev = all.toModel<Event>()
         return when (messageContent) {
-            is MessageEmoteContent -> buildEmoteMessageItem(messageContent, informationData, highlight, callback, attributes)
-            is MessageTextContent -> buildItemForTextContent(messageContent, informationData, highlight, callback, attributes)
-            is MessageImageInfoContent -> buildImageMessageItem(messageContent, informationData, highlight, callback, attributes)
-            is MessageNoticeContent -> buildNoticeMessageItem(messageContent, informationData, highlight, callback, attributes)
-            is MessageVideoContent -> buildVideoMessageItem(messageContent, informationData, highlight, callback, attributes)
-            is MessageFileContent -> buildFileMessageItem(messageContent, highlight, attributes)
-            is MessageAudioContent -> buildAudioMessageItem(messageContent, informationData, highlight, attributes)
+            is MessageEmoteContent               -> buildEmoteMessageItem(messageContent, informationData, highlight, callback, attributes)
+            is MessageTextContent                -> buildItemForTextContent(messageContent, informationData, highlight, callback, attributes)
+            is MessageImageInfoContent           -> buildImageMessageItem(messageContent, informationData, highlight, callback, attributes)
+            is MessageNoticeContent              -> buildNoticeMessageItem(messageContent, informationData, highlight, callback, attributes)
+            is MessageVideoContent               -> buildVideoMessageItem(messageContent, informationData, highlight, callback, attributes)
+            is MessageFileContent                -> buildFileMessageItem(messageContent, highlight, attributes)
+            is MessageAudioContent               -> buildAudioMessageItem(messageContent, informationData, highlight, attributes)
             is MessageVerificationRequestContent -> buildVerificationRequestMessageItem(messageContent, informationData, highlight, callback, attributes)
-            is MessageOptionsContent -> buildOptionsMessageItem(messageContent, informationData, highlight, callback, attributes)
-            is MessagePollResponseContent -> noticeItemFactory.create(event, highlight, roomSummaryHolder.roomSummary, callback)
+            is MessageOptionsContent             -> buildOptionsMessageItem(messageContent, informationData, highlight, callback, attributes)
+            is MessagePollResponseContent        -> noticeItemFactory.create(event, highlight, roomSummaryHolder.roomSummary, callback)
             else                                 -> buildNotHandledMessageItem(messageContent, informationData, highlight, callback, attributes)
         }
     }
@@ -164,7 +166,7 @@ class MessageItemFactory @Inject constructor(
                                         callback: TimelineEventController.Callback?,
                                         attributes: AbsMessageItem.Attributes): VectorEpoxyModel<*>? {
         return when (messageContent.optionType) {
-            OPTION_TYPE_POLL -> {
+            OPTION_TYPE_POLL    -> {
                 MessagePollItem_()
                         .attributes(attributes)
                         .callback(callback)
@@ -204,7 +206,12 @@ class MessageItemFactory @Inject constructor(
         return MessageFileItem_()
                 .attributes(attributes)
                 .izLocalFile(fileUrl.isLocalFile())
-                .izDownloaded(session.fileService().isFileInCache(fileUrl, messageContent.mimeType))
+                .izDownloaded(session.fileService().isFileInCache(
+                        fileUrl,
+                        messageContent.getFileName(),
+                        messageContent.mimeType,
+                        messageContent.encryptedFileInfo?.toElementToDecrypt())
+                )
                 .mxcUrl(fileUrl)
                 .contentUploadStateTrackerBinder(contentUploadStateTrackerBinder)
                 .contentDownloadStateTrackerBinder(contentDownloadStateTrackerBinder)
@@ -264,7 +271,7 @@ class MessageItemFactory @Inject constructor(
                 .attributes(attributes)
                 .leftGuideline(avatarSizeProvider.leftGuideline)
                 .izLocalFile(messageContent.getFileUrl().isLocalFile())
-                .izDownloaded(session.fileService().isFileInCache(mxcUrl, messageContent.mimeType))
+                .izDownloaded(session.fileService().isFileInCache(messageContent))
                 .mxcUrl(mxcUrl)
                 .contentUploadStateTrackerBinder(contentUploadStateTrackerBinder)
                 .contentDownloadStateTrackerBinder(contentDownloadStateTrackerBinder)
@@ -305,7 +312,7 @@ class MessageItemFactory @Inject constructor(
                 .leftGuideline(avatarSizeProvider.leftGuideline)
                 .imageContentRenderer(imageContentRenderer)
                 .contentUploadStateTrackerBinder(contentUploadStateTrackerBinder)
-                .playable(messageContent.info?.mimeType == "image/gif")
+                .playable(messageContent.info?.mimeType == MimeTypes.Gif)
                 .highlighted(highlight)
                 .mediaData(data)
                 .apply {
@@ -371,7 +378,7 @@ class MessageItemFactory @Inject constructor(
             val codeVisitor = CodeVisitor()
             codeVisitor.visit(localFormattedBody)
             when (codeVisitor.codeKind) {
-                CodeVisitor.Kind.BLOCK -> {
+                CodeVisitor.Kind.BLOCK  -> {
                     val codeFormattedBlock = htmlRenderer.get().render(localFormattedBody)
                     if (codeFormattedBlock == null) {
                         buildFormattedTextItem(messageContent, informationData, highlight, callback, attributes)
@@ -387,7 +394,7 @@ class MessageItemFactory @Inject constructor(
                         buildMessageTextItem(codeFormatted, false, informationData, highlight, callback, attributes)
                     }
                 }
-                CodeVisitor.Kind.NONE -> {
+                CodeVisitor.Kind.NONE   -> {
                     buildFormattedTextItem(messageContent, informationData, highlight, callback, attributes)
                 }
             }
@@ -424,6 +431,9 @@ class MessageItemFactory @Inject constructor(
         }
                 .useBigFont(linkifiedBody.length <= MAX_NUMBER_OF_EMOJI_FOR_BIG_FONT * 2 && containsOnlyEmojis(linkifiedBody.toString()))
                 .searchForPills(isFormatted)
+                .previewUrlRetriever(callback?.getPreviewUrlRetriever())
+                .imageContentRenderer(imageContentRenderer)
+                .previewUrlCallback(callback)
                 .leftGuideline(avatarSizeProvider.leftGuideline)
                 .attributes(attributes)
                 .highlighted(highlight)
@@ -529,6 +539,9 @@ class MessageItemFactory @Inject constructor(
                     }
                 }
                 .leftGuideline(avatarSizeProvider.leftGuideline)
+                .previewUrlRetriever(callback?.getPreviewUrlRetriever())
+                .imageContentRenderer(imageContentRenderer)
+                .previewUrlCallback(callback)
                 .attributes(attributes)
                 .highlighted(highlight)
                 .movementMethod(createLinkMovementMethod(callback))

vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/MessageInformationDataFactory.kt

@@ -1,19 +1,17 @@
 /*
-
-  * Copyright 2019 New Vector Ltd
-  *
-  * Licensed under the Apache License, Version 2.0 (the "License");
-  * you may not use this file except in compliance with the License.
-  * You may obtain a copy of the License at
-  *
-  *     http://www.apache.org/licenses/LICENSE-2.0
-  *
-  * Unless required by applicable law or agreed to in writing, software
-  * distributed under the License is distributed on an "AS IS" BASIS,
-  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  * See the License for the specific language governing permissions and
-  * limitations under the License.
-
+ * Copyright 2019 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 
 package im.vector.app.features.home.room.detail.timeline.helper

vector/src/main/java/im/vector/app/features/home/room/detail/timeline/helper/MessageItemAttributesFactory.kt

@@ -1,19 +1,17 @@
 /*
-
-  * Copyright 2019 New Vector Ltd
-  *
-  * Licensed under the Apache License, Version 2.0 (the "License");
-  * you may not use this file except in compliance with the License.
-  * You may obtain a copy of the License at
-  *
-  *     http://www.apache.org/licenses/LICENSE-2.0
-  *
-  * Unless required by applicable law or agreed to in writing, software
-  * distributed under the License is distributed on an "AS IS" BASIS,
-  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  * See the License for the specific language governing permissions and
-  * limitations under the License.
-
+ * Copyright 2019 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 package im.vector.app.features.home.room.detail.timeline.helper
 

vector/src/main/java/im/vector/app/features/home/room/detail/timeline/item/MessageTextItem.kt

@@ -23,7 +23,12 @@ import androidx.core.widget.TextViewCompat
 import com.airbnb.epoxy.EpoxyAttribute
 import com.airbnb.epoxy.EpoxyModelClass
 import im.vector.app.R
+import im.vector.app.features.home.room.detail.timeline.TimelineEventController
 import im.vector.app.features.home.room.detail.timeline.tools.findPillsAndProcess
+import im.vector.app.features.home.room.detail.timeline.url.PreviewUrlRetriever
+import im.vector.app.features.home.room.detail.timeline.url.PreviewUrlUiState
+import im.vector.app.features.home.room.detail.timeline.url.PreviewUrlView
+import im.vector.app.features.media.ImageContentRenderer
 
 @EpoxyModelClass(layout = R.layout.item_timeline_event_base)
 abstract class MessageTextItem : AbsMessageItem<MessageTextItem.Holder>() {
@@ -37,10 +42,27 @@ abstract class MessageTextItem : AbsMessageItem<MessageTextItem.Holder>() {
     @EpoxyAttribute
     var useBigFont: Boolean = false
 
+    @EpoxyAttribute
+    var previewUrlRetriever: PreviewUrlRetriever? = null
+
+    @EpoxyAttribute
+    var previewUrlCallback: TimelineEventController.PreviewUrlCallback? = null
+
+    @EpoxyAttribute
+    var imageContentRenderer: ImageContentRenderer? = null
+
     @EpoxyAttribute(EpoxyAttribute.Option.DoNotHash)
     var movementMethod: MovementMethod? = null
 
+    private val previewUrlViewUpdater = PreviewUrlViewUpdater()
+
     override fun bind(holder: Holder) {
+        // Preview URL
+        previewUrlViewUpdater.previewUrlView = holder.previewUrlView
+        previewUrlViewUpdater.imageContentRenderer = imageContentRenderer
+        previewUrlRetriever?.addListener(attributes.informationData.eventId, previewUrlViewUpdater)
+        holder.previewUrlView.delegate = previewUrlCallback
+
         if (useBigFont) {
             holder.messageView.textSize = 44F
         } else {
@@ -65,12 +87,29 @@ abstract class MessageTextItem : AbsMessageItem<MessageTextItem.Holder>() {
         holder.messageView.setTextFuture(textFuture)
     }
 
+    override fun unbind(holder: Holder) {
+        super.unbind(holder)
+        previewUrlViewUpdater.previewUrlView = null
+        previewUrlViewUpdater.imageContentRenderer = null
+        previewUrlRetriever?.removeListener(attributes.informationData.eventId, previewUrlViewUpdater)
+    }
+
     override fun getViewType() = STUB_ID
 
     class Holder : AbsMessageItem.Holder(STUB_ID) {
         val messageView by bind<AppCompatTextView>(R.id.messageTextView)
+        val previewUrlView by bind<PreviewUrlView>(R.id.messageUrlPreview)
     }
 
+    inner class PreviewUrlViewUpdater : PreviewUrlRetriever.PreviewUrlRetrieverListener {
+        var previewUrlView: PreviewUrlView? = null
+        var imageContentRenderer: ImageContentRenderer? = null
+
+        override fun onStateUpdated(state: PreviewUrlUiState) {
+            val safeImageContentRenderer = imageContentRenderer ?: return
+            previewUrlView?.render(state, safeImageContentRenderer)
+        }
+    }
     companion object {
         private const val STUB_ID = R.id.messageContentTextStub
     }

vector/src/main/java/im/vector/app/features/home/room/detail/timeline/url/PreviewUrlRetriever.kt

@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2020 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.app.features.home.room.detail.timeline.url
+
+import im.vector.app.BuildConfig
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.launch
+import org.matrix.android.sdk.api.cache.CacheStrategy
+import org.matrix.android.sdk.api.session.Session
+import org.matrix.android.sdk.api.session.events.model.Event
+
+class PreviewUrlRetriever(session: Session) {
+    private val mediaService = session.mediaService()
+
+    private val data = mutableMapOf<String, PreviewUrlUiState>()
+    private val listeners = mutableMapOf<String, MutableSet<PreviewUrlRetrieverListener>>()
+
+    // In memory list
+    private val blockedUrl = mutableSetOf<String>()
+
+    fun getPreviewUrl(event: Event, coroutineScope: CoroutineScope) {
+        val eventId = event.eventId ?: return
+
+        synchronized(data) {
+            if (data[eventId] == null) {
+                // Keep only the first URL for the moment
+                val url = mediaService.extractUrls(event)
+                        .firstOrNull()
+                        ?.takeIf { it !in blockedUrl }
+                if (url == null) {
+                    updateState(eventId, PreviewUrlUiState.NoUrl)
+                } else {
+                    updateState(eventId, PreviewUrlUiState.Loading)
+                }
+                url
+            } else {
+                // Already handled
+                null
+            }
+        }?.let { urlToRetrieve ->
+            coroutineScope.launch {
+                runCatching {
+                    mediaService.getPreviewUrl(
+                            url = urlToRetrieve,
+                            timestamp = null,
+                            cacheStrategy = if (BuildConfig.DEBUG) CacheStrategy.NoCache else CacheStrategy.TtlCache(CACHE_VALIDITY, false)
+                    )
+                }.fold(
+                        {
+                            synchronized(data) {
+                                // Blocked after the request has been sent?
+                                if (urlToRetrieve in blockedUrl) {
+                                    updateState(eventId, PreviewUrlUiState.NoUrl)
+                                } else {
+                                    updateState(eventId, PreviewUrlUiState.Data(eventId, urlToRetrieve, it))
+                                }
+                            }
+                        },
+                        {
+                            synchronized(data) {
+                                updateState(eventId, PreviewUrlUiState.Error(it))
+                            }
+                        }
+                )
+            }
+        }
+    }
+
+    fun doNotShowPreviewUrlFor(eventId: String, url: String) {
+        blockedUrl.add(url)
+
+        // Notify the listener
+        synchronized(data) {
+            data[eventId]
+                    ?.takeIf { it is PreviewUrlUiState.Data && it.url == url }
+                    ?.let {
+                        updateState(eventId, PreviewUrlUiState.NoUrl)
+                    }
+        }
+    }
+
+    private fun updateState(eventId: String, state: PreviewUrlUiState) {
+        data[eventId] = state
+        // Notify the listener
+        listeners[eventId].orEmpty().forEach {
+            it.onStateUpdated(state)
+        }
+    }
+
+    // Called by the Epoxy item during binding
+    fun addListener(key: String, listener: PreviewUrlRetrieverListener) {
+        listeners.getOrPut(key) { mutableSetOf() }.add(listener)
+
+        // Give the current state if any
+        synchronized(data) {
+            listener.onStateUpdated(data[key] ?: PreviewUrlUiState.Unknown)
+        }
+    }
+
+    // Called by the Epoxy item during unbinding
+    fun removeListener(key: String, listener: PreviewUrlRetrieverListener) {
+        listeners[key]?.remove(listener)
+    }
+
+    interface PreviewUrlRetrieverListener {
+        fun onStateUpdated(state: PreviewUrlUiState)
+    }
+
+    companion object {
+        // One week in millis
+        private const val CACHE_VALIDITY: Long = 7 * 24 * 3_600 * 1_000
+    }
+}

vector/src/main/java/im/vector/app/features/home/room/detail/timeline/url/PreviewUrlUiState.kt

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2020 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.app.features.home.room.detail.timeline.url
+
+import org.matrix.android.sdk.api.session.media.PreviewUrlData
+
+/**
+ * The state representing a preview url UI state for an Event
+ */
+sealed class PreviewUrlUiState {
+    // No info
+    object Unknown : PreviewUrlUiState()
+
+    // The event does not contain any URLs
+    object NoUrl : PreviewUrlUiState()
+
+    // Loading
+    object Loading : PreviewUrlUiState()
+
+    // Error
+    data class Error(val throwable: Throwable) : PreviewUrlUiState()
+
+    // PreviewUrl data
+    data class Data(val eventId: String,
+                    val url: String,
+                    val previewUrlData: PreviewUrlData) : PreviewUrlUiState()
+}

vector/src/main/java/im/vector/app/features/home/room/detail/timeline/url/PreviewUrlView.kt

@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2020 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.app.features.home.room.detail.timeline.url
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.View
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.core.view.isVisible
+import butterknife.BindView
+import butterknife.ButterKnife
+import im.vector.app.R
+import im.vector.app.core.extensions.setTextOrHide
+import im.vector.app.features.home.room.detail.timeline.TimelineEventController
+import im.vector.app.features.media.ImageContentRenderer
+import org.matrix.android.sdk.api.extensions.orFalse
+import org.matrix.android.sdk.api.session.media.PreviewUrlData
+
+/**
+ * A View to display a PreviewUrl and some other state
+ */
+class PreviewUrlView @JvmOverloads constructor(
+        context: Context,
+        attrs: AttributeSet? = null,
+        defStyleAttr: Int = 0
+) : ConstraintLayout(context, attrs, defStyleAttr), View.OnClickListener {
+
+    @BindView(R.id.url_preview_title)
+    lateinit var titleView: TextView
+
+    @BindView(R.id.url_preview_image)
+    lateinit var imageView: ImageView
+
+    @BindView(R.id.url_preview_description)
+    lateinit var descriptionView: TextView
+
+    @BindView(R.id.url_preview_site)
+    lateinit var siteView: TextView
+
+    @BindView(R.id.url_preview_close)
+    lateinit var closeView: View
+
+    var delegate: TimelineEventController.PreviewUrlCallback? = null
+
+    init {
+        setupView()
+    }
+
+    private var state: PreviewUrlUiState = PreviewUrlUiState.Unknown
+
+    /**
+     * This methods is responsible for rendering the view according to the newState
+     *
+     * @param newState the newState representing the view
+     */
+    fun render(newState: PreviewUrlUiState,
+               imageContentRenderer: ImageContentRenderer,
+               force: Boolean = false) {
+        if (newState == state && !force) {
+            return
+        }
+
+        state = newState
+
+        hideAll()
+        when (newState) {
+            PreviewUrlUiState.Unknown,
+            PreviewUrlUiState.NoUrl    -> renderHidden()
+            PreviewUrlUiState.Loading  -> renderLoading()
+            is PreviewUrlUiState.Error -> renderHidden()
+            is PreviewUrlUiState.Data  -> renderData(newState.previewUrlData, imageContentRenderer)
+        }
+    }
+
+    override fun onClick(v: View?) {
+        when (val finalState = state) {
+            is PreviewUrlUiState.Data -> delegate?.onPreviewUrlClicked(finalState.url)
+            else                      -> Unit
+        }
+    }
+
+    private fun onCloseClick() {
+        when (val finalState = state) {
+            is PreviewUrlUiState.Data -> delegate?.onPreviewUrlCloseClicked(finalState.eventId, finalState.url)
+            else                      -> Unit
+        }
+    }
+
+    // PRIVATE METHODS ****************************************************************************************************************************************
+
+    private fun setupView() {
+        inflate(context, R.layout.url_preview, this)
+        ButterKnife.bind(this)
+
+        setOnClickListener(this)
+        closeView.setOnClickListener { onCloseClick() }
+    }
+
+    private fun renderHidden() {
+        isVisible = false
+    }
+
+    private fun renderLoading() {
+        // Just hide for the moment
+        isVisible = false
+    }
+
+    private fun renderData(previewUrlData: PreviewUrlData, imageContentRenderer: ImageContentRenderer) {
+        isVisible = true
+        titleView.setTextOrHide(previewUrlData.title)
+        imageView.isVisible = previewUrlData.mxcUrl?.let { imageContentRenderer.render(it, imageView) }.orFalse()
+        descriptionView.setTextOrHide(previewUrlData.description)
+        siteView.setTextOrHide(previewUrlData.siteName.takeIf { it != previewUrlData.title })
+    }
+
+    /**
+     * Hide all views that are not visible in all state
+     */
+    private fun hideAll() {
+        titleView.isVisible = false
+        imageView.isVisible = false
+        descriptionView.isVisible = false
+        siteView.isVisible = false
+    }
+}

vector/src/main/java/im/vector/app/features/media/BaseAttachmentProvider.kt

@@ -153,12 +153,10 @@ abstract class BaseAttachmentProvider<Type>(
         } else {
             target.onVideoFileLoading(info.uid)
             fileService.downloadFile(
-                    downloadMode = FileService.DownloadMode.FOR_INTERNAL_USE,
-                    id = data.eventId,
-                    mimeType = data.mimeType,
-                    elementToDecrypt = data.elementToDecrypt,
                     fileName = data.filename,
+                    mimeType = data.mimeType,
                     url = data.url,
+                    elementToDecrypt = data.elementToDecrypt,
                     callback = object : MatrixCallback<File> {
                         override fun onSuccess(data: File) {
                             target.onVideoFileReady(info.uid, data)

vector/src/main/java/im/vector/app/features/media/DataAttachmentRoomProvider.kt

@@ -23,6 +23,7 @@ import org.matrix.android.sdk.api.MatrixCallback
 import org.matrix.android.sdk.api.session.file.FileService
 import org.matrix.android.sdk.api.session.room.Room
 import org.matrix.android.sdk.api.session.room.timeline.TimelineEvent
+import org.matrix.android.sdk.api.util.MimeTypes
 import java.io.File
 
 class DataAttachmentRoomProvider(
@@ -38,7 +39,7 @@ class DataAttachmentRoomProvider(
         return getItem(position).let {
             when (it) {
                 is ImageContentRenderer.Data -> {
-                    if (it.mimeType == "image/gif") {
+                    if (it.mimeType == MimeTypes.Gif) {
                         AttachmentInfo.AnimatedImage(
                                 uid = it.eventId,
                                 url = it.url ?: "",
@@ -77,11 +78,9 @@ class DataAttachmentRoomProvider(
     override fun getFileForSharing(position: Int, callback: (File?) -> Unit) {
         val item = getItem(position)
         fileService.downloadFile(
-                downloadMode = FileService.DownloadMode.FOR_EXTERNAL_SHARE,
-                id = item.eventId,
                 fileName = item.filename,
                 mimeType = item.mimeType,
-                url = item.url ?: "",
+                url = item.url,
                 elementToDecrypt = item.elementToDecrypt,
                 callback = object : MatrixCallback<File> {
                     override fun onSuccess(data: File) {

vector/src/main/java/im/vector/app/features/media/ImageContentRenderer.kt

@@ -23,6 +23,7 @@ import android.view.View
 import android.widget.ImageView
 import androidx.core.view.updateLayoutParams
 import com.bumptech.glide.load.DataSource
+import com.bumptech.glide.load.engine.DiskCacheStrategy
 import com.bumptech.glide.load.engine.GlideException
 import com.bumptech.glide.load.resource.bitmap.RoundedCorners
 import com.bumptech.glide.request.RequestListener
@@ -83,6 +84,19 @@ class ImageContentRenderer @Inject constructor(private val activeSessionHolder:
         STICKER
     }
 
+    /**
+     * For url preview
+     */
+    fun render(mxcUrl: String, imageView: ImageView): Boolean {
+        val contentUrlResolver = activeSessionHolder.getActiveSession().contentUrlResolver()
+        val imageUrl = contentUrlResolver.resolveFullSize(mxcUrl) ?: return false
+
+        GlideApp.with(imageView)
+                .load(imageUrl)
+                .into(imageView)
+        return true
+    }
+
     /**
      * For gallery
      */
@@ -129,6 +143,7 @@ class ImageContentRenderer @Inject constructor(private val activeSessionHolder:
             GlideApp
                     .with(contextView)
                     .load(data)
+                    .diskCacheStrategy(DiskCacheStrategy.NONE)
         } else {
             // Clear image
             val resolvedUrl = resolveUrl(data)
@@ -183,6 +198,7 @@ class ImageContentRenderer @Inject constructor(private val activeSessionHolder:
             GlideApp
                     .with(imageView)
                     .load(data)
+                    .diskCacheStrategy(DiskCacheStrategy.NONE)
         } else {
             // Clear image
             val resolvedUrl = resolveUrl(data)
@@ -214,20 +230,22 @@ class ImageContentRenderer @Inject constructor(private val activeSessionHolder:
                 .into(imageView)
     }
 
-    fun createGlideRequest(data: Data, mode: Mode, imageView: ImageView, size: Size): GlideRequest<Drawable> {
+    private fun createGlideRequest(data: Data, mode: Mode, imageView: ImageView, size: Size): GlideRequest<Drawable> {
         return createGlideRequest(data, mode, GlideApp.with(imageView), size)
     }
 
     fun createGlideRequest(data: Data, mode: Mode, glideRequests: GlideRequests, size: Size = processSize(data, mode)): GlideRequest<Drawable> {
         return if (data.elementToDecrypt != null) {
             // Encrypted image
-            glideRequests.load(data)
+            glideRequests
+                    .load(data)
+                    .diskCacheStrategy(DiskCacheStrategy.NONE)
         } else {
             // Clear image
             val contentUrlResolver = activeSessionHolder.getActiveSession().contentUrlResolver()
             val resolvedUrl = when (mode) {
                 Mode.FULL_SIZE,
-                Mode.STICKER   -> resolveUrl(data)
+                Mode.STICKER -> resolveUrl(data)
                 Mode.THUMBNAIL -> contentUrlResolver.resolveThumbnail(data.url, size.width, size.height, ContentUrlResolver.ThumbnailMethod.SCALE)
             }
             // Fallback to base url
@@ -295,7 +313,7 @@ class ImageContentRenderer @Inject constructor(private val activeSessionHolder:
                     finalHeight = min(maxImageWidth * height / width, maxImageHeight)
                     finalWidth = finalHeight * width / height
                 }
-                Mode.STICKER   -> {
+                Mode.STICKER -> {
                     // limit on width
                     val maxWidthDp = min(dimensionConverter.dpToPx(120), maxImageWidth / 2)
                     finalWidth = min(dimensionConverter.dpToPx(width), maxWidthDp)

vector/src/main/java/im/vector/app/features/media/RoomEventsAttachmentProvider.kt

@@ -28,6 +28,7 @@ import org.matrix.android.sdk.api.session.room.model.message.MessageVideoContent
 import org.matrix.android.sdk.api.session.room.model.message.MessageWithAttachmentContent
 import org.matrix.android.sdk.api.session.room.model.message.getFileUrl
 import org.matrix.android.sdk.api.session.room.timeline.TimelineEvent
+import org.matrix.android.sdk.api.util.MimeTypes
 import org.matrix.android.sdk.internal.crypto.attachments.toElementToDecrypt
 import java.io.File
 
@@ -56,7 +57,7 @@ class RoomEventsAttachmentProvider(
                         allowNonMxcUrls = it.root.sendState.isSending()
 
                 )
-                if (content.mimeType == "image/gif") {
+                if (content.mimeType == MimeTypes.Gif) {
                     AttachmentInfo.AnimatedImage(
                             uid = it.eventId,
                             url = content.url ?: "",
@@ -125,8 +126,6 @@ class RoomEventsAttachmentProvider(
                     as? MessageWithAttachmentContent
                     ?: return@let
             fileService.downloadFile(
-                    downloadMode = FileService.DownloadMode.FOR_EXTERNAL_SHARE,
-                    id = timelineEvent.eventId,
                     fileName = messageContent.body,
                     mimeType = messageContent.mimeType,
                     url = messageContent.getFileUrl(),

vector/src/main/java/im/vector/app/features/media/VideoContentRenderer.kt

@@ -27,7 +27,6 @@ import im.vector.app.core.error.ErrorFormatter
 import im.vector.app.core.utils.isLocalFile
 import kotlinx.android.parcel.Parcelize
 import org.matrix.android.sdk.api.MatrixCallback
-import org.matrix.android.sdk.api.session.file.FileService
 import org.matrix.android.sdk.internal.crypto.attachments.ElementToDecrypt
 import timber.log.Timber
 import java.io.File
@@ -76,8 +75,6 @@ class VideoContentRenderer @Inject constructor(private val activeSessionHolder:
 
                 activeSessionHolder.getActiveSession().fileService()
                         .downloadFile(
-                                downloadMode = FileService.DownloadMode.FOR_INTERNAL_USE,
-                                id = data.eventId,
                                 fileName = data.filename,
                                 mimeType = data.mimeType,
                                 url = data.url,
@@ -116,8 +113,6 @@ class VideoContentRenderer @Inject constructor(private val activeSessionHolder:
 
                 activeSessionHolder.getActiveSession().fileService()
                         .downloadFile(
-                                downloadMode = FileService.DownloadMode.FOR_INTERNAL_USE,
-                                id = data.eventId,
                                 fileName = data.filename,
                                 mimeType = data.mimeType,
                                 url = data.url,

vector/src/main/java/im/vector/app/features/rageshake/BugReporter.kt

@@ -46,6 +46,7 @@ import okhttp3.Response
 import org.json.JSONException
 import org.json.JSONObject
 import org.matrix.android.sdk.api.Matrix
+import org.matrix.android.sdk.api.util.MimeTypes
 import timber.log.Timber
 import java.io.File
 import java.io.IOException
@@ -274,7 +275,7 @@ class BugReporter @Inject constructor(
 
                     // add the gzipped files
                     for (file in gzippedFiles) {
-                        builder.addFormDataPart("compressed-log", file.name, file.asRequestBody("application/octet-stream".toMediaTypeOrNull()))
+                        builder.addFormDataPart("compressed-log", file.name, file.asRequestBody(MimeTypes.OctetStream.toMediaTypeOrNull()))
                     }
 
                     mBugReportFiles.addAll(gzippedFiles)
@@ -295,7 +296,7 @@ class BugReporter @Inject constructor(
                                 }
 
                                 builder.addFormDataPart("file",
-                                        logCatScreenshotFile.name, logCatScreenshotFile.asRequestBody("application/octet-stream".toMediaTypeOrNull()))
+                                        logCatScreenshotFile.name, logCatScreenshotFile.asRequestBody(MimeTypes.OctetStream.toMediaTypeOrNull()))
                             } catch (e: Exception) {
                                 Timber.e(e, "## sendBugReport() : fail to write screenshot$e")
                             }

vector/src/main/java/im/vector/app/features/roomprofile/uploads/RoomUploadsViewModel.kt

@@ -30,10 +30,7 @@ import im.vector.app.core.extensions.exhaustive
 import im.vector.app.core.platform.VectorViewModel
 import kotlinx.coroutines.launch
 import org.matrix.android.sdk.api.session.Session
-import org.matrix.android.sdk.api.session.file.FileService
 import org.matrix.android.sdk.api.session.room.model.message.MessageType
-import org.matrix.android.sdk.api.session.room.model.message.getFileUrl
-import org.matrix.android.sdk.internal.crypto.attachments.toElementToDecrypt
 import org.matrix.android.sdk.internal.util.awaitCallback
 import org.matrix.android.sdk.rx.rx
 import org.matrix.android.sdk.rx.unwrap
@@ -134,12 +131,7 @@ class RoomUploadsViewModel @AssistedInject constructor(
             try {
                 val file = awaitCallback<File> {
                     session.fileService().downloadFile(
-                            downloadMode = FileService.DownloadMode.FOR_EXTERNAL_SHARE,
-                            id = action.uploadEvent.eventId,
-                            fileName = action.uploadEvent.contentWithAttachmentContent.body,
-                            url = action.uploadEvent.contentWithAttachmentContent.getFileUrl(),
-                            mimeType = action.uploadEvent.contentWithAttachmentContent.mimeType,
-                            elementToDecrypt = action.uploadEvent.contentWithAttachmentContent.encryptedFileInfo?.toElementToDecrypt(),
+                            messageContent = action.uploadEvent.contentWithAttachmentContent,
                             callback = it
                     )
                 }
@@ -155,12 +147,7 @@ class RoomUploadsViewModel @AssistedInject constructor(
             try {
                 val file = awaitCallback<File> {
                     session.fileService().downloadFile(
-                            downloadMode = FileService.DownloadMode.FOR_EXTERNAL_SHARE,
-                            id = action.uploadEvent.eventId,
-                            fileName = action.uploadEvent.contentWithAttachmentContent.body,
-                            mimeType = action.uploadEvent.contentWithAttachmentContent.mimeType,
-                            url = action.uploadEvent.contentWithAttachmentContent.getFileUrl(),
-                            elementToDecrypt = action.uploadEvent.contentWithAttachmentContent.encryptedFileInfo?.toElementToDecrypt(),
+                            messageContent = action.uploadEvent.contentWithAttachmentContent,
                             callback = it)
                 }
                 _viewEvents.post(RoomUploadsViewEvents.FileReadyForSaving(file, action.uploadEvent.contentWithAttachmentContent.body))

vector/src/main/java/im/vector/app/features/settings/VectorPreferences.kt

@@ -783,6 +783,15 @@ class VectorPreferences @Inject constructor(private val context: Context) {
         return defaultPrefs.getBoolean(SETTINGS_USE_ANALYTICS_KEY, false)
     }
 
+    /**
+     * Tells if the user wants to see URL previews in the timeline
+     *
+     * @return true if the user wants to see URL previews in the timeline
+     */
+    fun showUrlPreviews(): Boolean {
+        return defaultPrefs.getBoolean(SETTINGS_SHOW_URL_PREVIEW_KEY, true)
+    }
+
     /**
      * Enable or disable the analytics tracking.
      *

vector/src/main/java/im/vector/app/features/settings/VectorSettingsPreferencesFragment.kt

@@ -22,7 +22,6 @@ import android.widget.CheckedTextView
 import android.widget.LinearLayout
 import androidx.appcompat.app.AlertDialog
 import androidx.preference.Preference
-import androidx.preference.SwitchPreference
 import im.vector.app.R
 import im.vector.app.core.extensions.restart
 import im.vector.app.core.preference.VectorListPreference
@@ -64,9 +63,9 @@ class VectorSettingsPreferencesFragment @Inject constructor(
         }
 
         // Url preview
+        /*
+        TODO Note: we keep the setting client side for now
         findPreference<SwitchPreference>(VectorPreferences.SETTINGS_SHOW_URL_PREVIEW_KEY)!!.let {
-            /*
-            TODO
             it.isChecked = session.isURLPreviewEnabled
 
             it.onPreferenceChangeListener = Preference.OnPreferenceChangeListener { _, newValue ->
@@ -100,8 +99,8 @@ class VectorSettingsPreferencesFragment @Inject constructor(
 
                 false
             }
-            */
         }
+        */
 
         // update keep medias period
         findPreference<VectorPreference>(VectorPreferences.SETTINGS_MEDIA_SAVING_PERIOD_KEY)!!.let {

vector/src/main/res/drawable/bg_send.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:bottom="10dp"
+        android:left="10dp"
+        android:right="10dp"
+        android:top="10dp">
+        <shape android:shape="oval">
+            <solid android:color="@color/riotx_accent" />
+        </shape>
+    </item>
+    <item android:drawable="?attr/selectableItemBackground" />
+</layer-list>

vector/src/main/res/drawable/ic_attachment.xml

@@ -1,7 +1,21 @@
-<vector android:autoMirrored="true" android:height="24dp"
-    android:viewportHeight="24" android:viewportWidth="24"
-    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
-    <path android:fillColor="#ffffff"
-        android:pathData="M21,12C21,16.9706 16.9706,21 12,21C7.0294,21 3,16.9706 3,12C3,7.0294 7.0294,3 12,3C16.9706,3 21,7.0294 21,12ZM8,10C6.8954,10 6,10.8954 6,12C6,13.1046 6.8954,14 8,14H10V16C10,17.1046 10.8954,18 12,18C13.1046,18 14,17.1046 14,16V14H16C17.1046,14 18,13.1046 18,12C18,10.8954 17.1046,10 16,10H14V8C14,6.8954 13.1046,6 12,6C10.8954,6 10,6.8954 10,8V10H8Z"
-        android:strokeColor="#ffffff" android:strokeWidth="2"/>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="32dp"
+    android:height="32dp"
+    android:viewportWidth="32"
+    android:viewportHeight="32">
+  <path
+      android:pathData="M16,16m-16,0a16,16 0,1 1,32 0a16,16 0,1 1,-32 0"
+      android:fillColor="#E3E8F0"/>
+  <path
+      android:pathData="M10.0009,16H22.0009"
+      android:strokeWidth="1.5"
+      android:fillColor="#00000000"
+      android:strokeColor="#61708B"
+      android:strokeLineCap="round"/>
+  <path
+      android:pathData="M16.0009,10V22"
+      android:strokeWidth="1.5"
+      android:fillColor="#00000000"
+      android:strokeColor="#61708B"
+      android:strokeLineCap="round"/>
 </vector>

vector/src/main/res/drawable/ic_close_24dp.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="25dp"
+    android:height="24dp"
+    android:viewportWidth="25"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#000000"
+        android:fillType="evenOdd"
+        android:pathData="M17.7929,5.2929C18.1834,4.9024 18.8166,4.9024 19.2071,5.2929C19.5976,5.6834 19.5976,6.3166 19.2071,6.7071L13.9142,12L19.2071,17.2929C19.5976,17.6834 19.5976,18.3166 19.2071,18.7071C18.8166,19.0976 18.1834,19.0976 17.7929,18.7071L12.5,13.4142L7.2071,18.7071C6.8166,19.0976 6.1834,19.0976 5.7929,18.7071C5.4024,18.3166 5.4024,17.6834 5.7929,17.2929L11.0858,12L5.7929,6.7071C5.4024,6.3166 5.4024,5.6834 5.7929,5.2929C6.1834,4.9024 6.8166,4.9024 7.2071,5.2929L12.5,10.5858L17.7929,5.2929Z" />
+</vector>