Observe timeline event of the selected poll

vector/src/main/java/im/vector/app/core/event/GetTimelineEventUseCase.kt

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2023 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.event
+
+import androidx.lifecycle.asFlow
+import im.vector.app.core.di.ActiveSessionHolder
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.emptyFlow
+import org.matrix.android.sdk.api.session.room.timeline.TimelineEvent
+import org.matrix.android.sdk.flow.unwrap
+import javax.inject.Inject
+
+// TODO add unit tests
+class GetTimelineEventUseCase @Inject constructor(
+        private val activeSessionHolder: ActiveSessionHolder,
+) {
+
+    fun execute(roomId: String, eventId: String): Flow<TimelineEvent> {
+        return activeSessionHolder
+                .getActiveSession()
+                .roomService()
+                .getRoom(roomId)
+                ?.timelineService()
+                ?.getTimelineEventLive(eventId)
+                ?.asFlow()
+                ?.unwrap()
+                ?: emptyFlow()
+    }
+}

vector/src/main/java/im/vector/app/features/roomprofile/polls/detail/ui/RoomPollDetailActivity.kt

@@ -47,9 +47,13 @@ class RoomPollDetailActivity : VectorBaseActivity<ActivitySimpleBinding>() {
     }
 
     companion object {
-        fun newIntent(context: Context, pollId: String): Intent {
+        fun newIntent(context: Context, pollId: String, roomId: String): Intent {
             return Intent(context, RoomPollDetailActivity::class.java).apply {
-                putExtra(Mavericks.KEY_ARG, RoomPollDetailArgs(pollId))
+                val args = RoomPollDetailArgs(
+                        pollId = pollId,
+                        roomId = roomId,
+                )
+                putExtra(Mavericks.KEY_ARG, args)
             }
         }
     }

vector/src/main/java/im/vector/app/features/roomprofile/polls/detail/ui/RoomPollDetailFragment.kt

@@ -36,6 +36,7 @@ import javax.inject.Inject
 @Parcelize
 data class RoomPollDetailArgs(
         val pollId: String,
+        val roomId: String,
 ) : Parcelable
 
 @AndroidEntryPoint
@@ -80,13 +81,9 @@ class RoomPollDetailFragment : VectorBaseFragment<FragmentRoomPollDetailBinding>
     override fun invalidate() = withState(viewModel) { state ->
         state.pollDetail ?: return@withState
 
+        // TODO should we update the title when the poll status changes?
         setupToolbar(state.pollDetail.isEnded)
 
-        /*
-        state.getSelectedPoll()?.let { _ ->
-            roomPollDetailController.setData(state)
-        }
-        Unit
-         */
+        // TODO update data of the controller
     }
 }

vector/src/main/java/im/vector/app/features/roomprofile/polls/detail/ui/RoomPollDetailViewModel.kt

@@ -18,15 +18,25 @@ package im.vector.app.features.roomprofile.polls.detail.ui
 
 import dagger.assisted.Assisted
 import dagger.assisted.AssistedInject
+import im.vector.app.core.event.GetTimelineEventUseCase
 import im.vector.app.core.platform.VectorViewModel
+import kotlinx.coroutines.flow.launchIn
 
 class RoomPollDetailViewModel @AssistedInject constructor(
         @Assisted initialState: RoomPollDetailViewState,
+        private val getTimelineEventUseCase: GetTimelineEventUseCase,
 ) : VectorViewModel<RoomPollDetailViewState, RoomPollDetailAction, RoomPollDetailViewEvent>(initialState) {
 
     init {
-        // TODO observe poll using TimelineService.getTimelineEventLive
-        // TODO create a dedicated useCase and mapper
+        observePollDetails(
+                pollId = initialState.pollId,
+                roomId = initialState.roomId,
+        )
+    }
+
+    private fun observePollDetails(pollId: String, roomId: String) {
+        getTimelineEventUseCase.execute(roomId = roomId, eventId = pollId)
+                .launchIn(viewModelScope)
     }
 
     override fun handle(action: RoomPollDetailAction) {

vector/src/main/java/im/vector/app/features/roomprofile/polls/detail/ui/RoomPollDetailViewState.kt

@@ -20,8 +20,12 @@ import com.airbnb.mvrx.MavericksState
 
 data class RoomPollDetailViewState(
         val pollId: String,
+        val roomId: String,
         val pollDetail: RoomPollDetail? = null,
 ) : MavericksState {
 
-    constructor(roomPollDetailArgs: RoomPollDetailArgs) : this(pollId = roomPollDetailArgs.pollId)
+    constructor(roomPollDetailArgs: RoomPollDetailArgs) : this(
+            pollId = roomPollDetailArgs.pollId,
+            roomId = roomPollDetailArgs.roomId,
+    )
 }

vector/src/main/java/im/vector/app/features/roomprofile/polls/list/ui/RoomPollsListFragment.kt

@@ -127,8 +127,12 @@ abstract class RoomPollsListFragment :
         views.roomPollsLoadMoreWhenEmptyProgress.isVisible = viewState.hasNoPollsAndCanLoadMore() && viewState.isLoadingMore
     }
 
-    override fun onPollClicked(pollId: String) {
-        viewNavigator.goToPollDetails(requireContext(), pollId)
+    override fun onPollClicked(pollId: String) = withState(viewModel) {
+        viewNavigator.goToPollDetails(
+                context = requireContext(),
+                pollId = pollId,
+                roomId = it.roomId,
+        )
     }
 
     override fun onLoadMoreClicked() {

vector/src/main/java/im/vector/app/features/roomprofile/polls/list/ui/RoomPollsListNavigator.kt

@@ -23,7 +23,13 @@ import javax.inject.Inject
 // TODO add unit tests
 class RoomPollsListNavigator @Inject constructor() {
 
-    fun goToPollDetails(context: Context, pollId: String) {
-        context.startActivity(RoomPollDetailActivity.newIntent(context, pollId))
+    fun goToPollDetails(context: Context, pollId: String, roomId: String) {
+        context.startActivity(
+                RoomPollDetailActivity.newIntent(
+                        context = context,
+                        pollId = pollId,
+                        roomId = roomId,
+                )
+        )
     }
 }