add new own sync adapter/service for contacts (work in progress)

src/eu/alefzero/owncloud/syncadapter/ContactSyncAdapter.java

@@ -0,0 +1,97 @@
+package eu.alefzero.owncloud.syncadapter;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+
+import android.accounts.Account;
+import android.content.ContentProviderClient;
+import android.content.Context;
+import android.content.SyncResult;
+import android.content.res.AssetFileDescriptor;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Bundle;
+import android.provider.ContactsContract;
+import android.util.Log;
+
+public class ContactSyncAdapter extends AbstractOwnCloudSyncAdapter {
+
+	private static final String TAG = "ContactSyncAdapter";
+
+	public ContactSyncAdapter(Context context, boolean autoInitialize) {
+		super(context, autoInitialize);
+	}
+
+	@Override
+	public synchronized void onPerformSync(
+			Account account, 
+			Bundle extras, 
+			String authority, 
+			ContentProviderClient provider, 
+			SyncResult syncResult) {
+		
+		this.setAccount(account);
+		this.setContentProvider(provider);
+
+		// TODO find all contacts on ownCloud that not synced or the sync date is behind than the last sync date
+		Cursor cursor = getContacts();
+		if (cursor != null && cursor.getCount() > 0) {
+			while (cursor.moveToNext()) {
+				String id = cursor.getString(
+						cursor.getColumnIndex(ContactsContract.Contacts._ID));
+				String lookup = cursor.getString(
+						cursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
+				Log.d(TAG, "Found Contact id: " + id + " with lookupkey: "+lookup);
+				
+				try {
+					FileInputStream fis = getContactVcard(lookup);
+					// TODO make a webdav request based on the stream
+					// TODO send request to the ownCloud server
+					// TODO mark the current contact as synced - where to store?					
+				} catch (IOException e) {
+					// TODO Auto-generated catch block
+					e.printStackTrace();
+				}
+			}
+		}
+
+	}
+	
+	/**
+	 * Returns the vCard based on the LookupKey for Contact as Stream 
+	 * 
+	 * @param lookupKey
+	 * @return
+	 * @throws IOException
+	 */
+	private FileInputStream getContactVcard(String lookupKey) throws IOException {
+		Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);
+		AssetFileDescriptor fd = getContext().getContentResolver().openAssetFileDescriptor(uri, "r");
+		return fd.createInputStream();
+	}
+
+	/**
+	 * Obtains the contact list.
+	 *
+	 * @return A cursor for for accessing the contact list.
+	 */
+	private Cursor getContacts()
+	{
+		// Run query
+		Uri uri = ContactsContract.Contacts.CONTENT_URI;
+		String[] projection = new String[] {
+				ContactsContract.Contacts._ID,
+				ContactsContract.Contacts.LOOKUP_KEY
+		};
+
+		boolean showInvisible = false;
+		String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = '" + 
+				(showInvisible ? "0" : "1") + "'";
+		String[] selectionArgs = null;
+		String sortOrder = ContactsContract.Contacts._ID + " DESC";
+
+		return getContext().getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder);
+	}
+
+}

src/eu/alefzero/owncloud/syncadapter/ContactSyncService.java

@@ -0,0 +1,31 @@
+package eu.alefzero.owncloud.syncadapter;
+
+import android.app.Service;
+import android.content.Intent;
+import android.os.IBinder;
+
+public class ContactSyncService extends Service {
+    private static final Object syncAdapterLock = new Object();
+    private static AbstractOwnCloudSyncAdapter concretSyncAdapter = null;
+
+    /*
+     * {@inheritDoc}
+     */
+    @Override
+    public void onCreate() {
+        synchronized (syncAdapterLock) {
+            if (concretSyncAdapter == null) {
+                concretSyncAdapter = new ContactSyncAdapter(getApplicationContext(), true);
+            }
+        }
+    }
+
+    /*
+     * {@inheritDoc}
+     */
+    @Override
+    public IBinder onBind(Intent intent) {
+        return concretSyncAdapter.getSyncAdapterBinder();
+    }
+
+}