Fixes FS#229: prompt for confirmation before deleting a file

src/main/java/de/thedevstack/conversationsplus/ui/ConversationFragment.java

@@ -68,6 +68,7 @@ import de.thedevstack.conversationsplus.ui.adapter.MessageAdapter;
 import de.thedevstack.conversationsplus.ui.adapter.MessageAdapter.OnContactPictureClicked;
 import de.thedevstack.conversationsplus.ui.adapter.MessageAdapter.OnContactPictureLongClicked;
 import de.thedevstack.conversationsplus.ui.listeners.ConversationSwipeRefreshListener;
+import de.thedevstack.conversationsplus.ui.listeners.DeleteFileCallback;
 import de.thedevstack.conversationsplus.ui.listeners.SimpleUserDecisionCallback;
 import de.thedevstack.conversationsplus.ui.listeners.UserDecisionListener;
 import de.thedevstack.conversationsplus.utils.GeoHelper;
@@ -588,7 +589,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 	public boolean onContextItemSelected(MenuItem item) {
 		switch (item.getItemId()) {
             case R.id.msg_ctx_menu_delete_remote_file:
-                new SimpleConfirmDialog(getActivity(), "Are you sure?", new DeleteRemoteFileService(selectedMessage)).show();
+                new SimpleConfirmDialog(getActivity(), R.string.cplus_are_you_sure, new DeleteRemoteFileService(selectedMessage)).show();
                 return true;
             case R.id.msg_ctx_mnu_details:
                 new MessageDetailsDialog(getActivity(), selectedMessage).show();
@@ -615,7 +616,7 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 				retryDecryption(selectedMessage);
 				return true;
 			case R.id.delete_file:
-				deleteFile(selectedMessage);
+                new SimpleConfirmDialog(getActivity(), R.string.cplus_are_you_sure, new DeleteFileCallback(selectedMessage)).show();
 				return true;
 			default:
 				return super.onContextItemSelected(item);
@@ -654,13 +655,6 @@ public class ConversationFragment extends Fragment implements EditMessage.Keyboa
 		}
 	}
 
-	private void deleteFile(Message message) {
-		if (FileBackend.deleteFile(message, activity.xmppConnectionService)) {
-			message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
-			activity.xmppConnectionService.updateConversationUi();
-		}
-	}
-
 	private void resendMessage(Message message) {
 		if (message.getType() == Message.TYPE_FILE || message.getType() == Message.TYPE_IMAGE) {
 			DownloadableFile file = FileBackend.getFile(message);

src/main/java/de/thedevstack/conversationsplus/ui/listeners/DeleteFileCallback.java

@@ -0,0 +1,36 @@
+package de.thedevstack.conversationsplus.ui.listeners;
+
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.entities.Transferable;
+import de.thedevstack.conversationsplus.entities.TransferablePlaceholder;
+import de.thedevstack.conversationsplus.persistance.FileBackend;
+import de.thedevstack.conversationsplus.utils.UiUpdateHelper;
+import de.thedevstack.conversationsplus.utils.XmppConnectionServiceAccessor;
+
+/**
+ * Created by steckbrief on 23.08.2016.
+ */
+public class DeleteFileCallback implements SimpleUserDecisionCallback {
+    private final Message message;
+
+    public DeleteFileCallback(Message message) {
+        this.message = message;
+    }
+
+    private void deleteFile() {
+        if (FileBackend.deleteFile(this.message, XmppConnectionServiceAccessor.xmppConnectionService)) {
+            this.message.setTransferable(new TransferablePlaceholder(Transferable.STATUS_DELETED));
+            UiUpdateHelper.updateConversationUi();
+        }
+    }
+
+    @Override
+    public void onYes() {
+        this.deleteFile();
+    }
+
+    @Override
+    public void onNo() {
+        // Nothing to do
+    }
+}

src/main/res/values-de/strings.xml

@@ -634,4 +634,5 @@
   <string name="no_keys_just_confirm">Du vertraust diesem Kontakt bereits. Durch Auswählen von \"Fertig\" bestätigst du, dass %s Teil dieser Konferenz ist.</string>
   <string name="select_image_and_crop">Bild auswählen und zuschneiden</string>
   <string name="this_account_is_disabled">Du hast diesen Account deaktiviert</string>
+  <string name="cplus_are_you_sure">Bist du dir sicher?</string>
 </resources>

src/main/res/values/strings.xml

@@ -675,4 +675,5 @@
 	<string name="no_application_to_share_uri">No application found to share URI</string>
 	<string name="share_uri_with">Share URI with…</string>
 	<string name="delete_remote_file_x">Delete remote file</string>
+	<string name="cplus_are_you_sure">Are you sure?</string>
 </resources>