Do lots of work on call notification

Signed-off-by: Mario Danic <mario@lovelyhq.com>

app/src/main/AndroidManifest.xml

@@ -46,7 +46,9 @@
         tools:replace="label, icon, roundIcon, theme, name, allowBackup">
 
 
-        <meta-data android:name="android.max_aspect" android:value="10" />
+        <meta-data
+            android:name="android.max_aspect"
+            android:value="10"/>
 
         <activity
             android:name=".activities.MainActivity"
@@ -60,7 +62,7 @@
         </activity>
 
         <activity
-            android:name=".activities.CallActivity"
+            android:name=".activities.MagicCallActivity"
             android:configChanges="orientation|screenSize"
             android:launchMode="singleTask"/>
 

app/src/main/java/com/nextcloud/talk/activities/MagicCallActivity.java

@@ -0,0 +1,96 @@
+/*
+ * Nextcloud Talk application
+ *
+ * @author Mario Danic
+ * Copyright (C) 2017-2018 Mario Danic <mario@lovelyhq.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.nextcloud.talk.activities;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.Window;
+import android.view.WindowManager;
+
+import com.bluelinelabs.conductor.Conductor;
+import com.bluelinelabs.conductor.Router;
+import com.bluelinelabs.conductor.RouterTransaction;
+import com.bluelinelabs.conductor.changehandler.HorizontalChangeHandler;
+import com.nextcloud.talk.R;
+import com.nextcloud.talk.application.NextcloudTalkApplication;
+import com.nextcloud.talk.controllers.CallController;
+import com.nextcloud.talk.controllers.CallNotificationController;
+import com.nextcloud.talk.utils.bundle.BundleKeys;
+
+import autodagger.AutoInjector;
+import butterknife.BindView;
+import butterknife.ButterKnife;
+
+@AutoInjector(NextcloudTalkApplication.class)
+public class MagicCallActivity extends AppCompatActivity {
+    private static final String TAG = "MagicCallActivity";
+
+    @BindView(R.id.controller_container)
+    ViewGroup container;
+
+    private Router router;
+
+    private static int getSystemUiVisibility() {
+        int flags = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN;
+        flags |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
+        return flags;
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        NextcloudTalkApplication.getSharedApplication().getComponentApplication().inject (this);
+
+        requestWindowFeature(Window.FEATURE_NO_TITLE);
+        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN |
+                WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
+                WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
+                WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
+        getWindow().getDecorView().setSystemUiVisibility(getSystemUiVisibility());
+
+        setContentView(R.layout.activity_magic_call);
+        ButterKnife.bind(this);
+        router = Conductor.attachRouter(this, container, savedInstanceState);
+        router.setPopsLastView(true);
+
+        if (!router.hasRootController()) {
+            if (getIntent().getBooleanExtra(BundleKeys.KEY_FROM_NOTIFICATION_START_CALL, false)) {
+                router.setRoot(RouterTransaction.with(new CallNotificationController(getIntent().getExtras()))
+                        .pushChangeHandler(new HorizontalChangeHandler())
+                        .popChangeHandler(new HorizontalChangeHandler()));
+            } else {
+                router.setRoot(RouterTransaction.with(new CallController(getIntent().getExtras()))
+                        .pushChangeHandler(new HorizontalChangeHandler())
+                        .popChangeHandler(new HorizontalChangeHandler()));
+            }
+        }
+    }
+
+    @Override
+    public void onBackPressed() {
+        if (!router.handleBack()) {
+            super.onBackPressed();
+        }
+    }
+
+}

app/src/main/java/com/nextcloud/talk/controllers/CallNotificationController.java

@@ -117,7 +117,10 @@ public class CallNotificationController extends BaseController {
     @OnClick(R.id.callControlHangupView)
     void hangup() {
         leavingScreen = true;
-        getRouter().popCurrentController();
+
+        if (getActivity() != null) {
+            getActivity().finish();
+        }
     }
 
     @OnClick(R.id.callAnswerCameraView)
@@ -135,12 +138,9 @@ public class CallNotificationController extends BaseController {
     private void setBackstackAndProceed() {
         originalBundle.putString(BundleKeys.KEY_ROOM_TOKEN, currentRoom.getToken());
 
-        List<RouterTransaction> routerTransactions = new ArrayList<>();
-        routerTransactions.add(RouterTransaction.with(new MagicBottomNavigationController())
-                .popChangeHandler(new HorizontalChangeHandler()).pushChangeHandler(new HorizontalChangeHandler()));
-        routerTransactions.add(RouterTransaction.with(new ChatController(originalBundle)).popChangeHandler(new
-                HorizontalChangeHandler()).pushChangeHandler(new HorizontalChangeHandler()));
-        getRouter().setBackstack(routerTransactions, new HorizontalChangeHandler());
+        getRouter().setRoot(RouterTransaction.with(new CallController(originalBundle))
+                .popChangeHandler(new HorizontalChangeHandler())
+                .pushChangeHandler(new HorizontalChangeHandler()));
     }
 
     private void checkIfAnyParticipantsRemainInRoom() {
@@ -235,8 +235,6 @@ public class CallNotificationController extends BaseController {
     protected void onViewBound(@NonNull View view) {
         super.onViewBound(view);
 
-        getActionBar().hide();
-
         handleFromNotification();
 
         String callRingtonePreferenceString = appPreferences.getCallRingtoneUri();

app/src/main/java/com/nextcloud/talk/controllers/CallsListController.java

@@ -50,7 +50,7 @@ import com.bluelinelabs.conductor.changehandler.VerticalChangeHandler;
 import com.bluelinelabs.conductor.internal.NoOpControllerChangeHandler;
 import com.kennyc.bottomsheet.BottomSheet;
 import com.nextcloud.talk.R;
-import com.nextcloud.talk.activities.CallActivity;
+import com.nextcloud.talk.activities.MagicCallActivity;
 import com.nextcloud.talk.adapters.items.CallItem;
 import com.nextcloud.talk.api.NcApi;
 import com.nextcloud.talk.application.NextcloudTalkApplication;
@@ -508,7 +508,7 @@ public class CallsListController extends BaseController implements SearchView.On
                 } else {
                     overridePushHandler(new NoOpControllerChangeHandler());
                     overridePopHandler(new NoOpControllerChangeHandler());
-                    Intent callIntent = new Intent(getActivity(), CallActivity.class);
+                    Intent callIntent = new Intent(getActivity(), MagicCallActivity.class);
                     callIntent.putExtras(bundle);
                     startActivity(callIntent);
                 }

app/src/main/java/com/nextcloud/talk/controllers/ChatController.java

@@ -56,7 +56,7 @@ import com.bumptech.glide.request.RequestListener;
 import com.bumptech.glide.request.RequestOptions;
 import com.bumptech.glide.request.target.Target;
 import com.nextcloud.talk.R;
-import com.nextcloud.talk.activities.CallActivity;
+import com.nextcloud.talk.activities.MagicCallActivity;
 import com.nextcloud.talk.adapters.messages.MagicIncomingTextMessageViewHolder;
 import com.nextcloud.talk.adapters.messages.MagicOutcomingTextMessageViewHolder;
 import com.nextcloud.talk.api.NcApi;
@@ -831,7 +831,7 @@ public class ChatController extends BaseController implements MessagesListAdapte
                 bundle.putBoolean(BundleKeys.KEY_CALL_VOICE_ONLY, true);
             }
 
-            Intent callIntent = new Intent(getActivity(), CallActivity.class);
+            Intent callIntent = new Intent(getActivity(), MagicCallActivity.class);
             callIntent.putExtras(bundle);
 
             return callIntent;

app/src/main/java/com/nextcloud/talk/controllers/ContactsController.java

@@ -51,7 +51,7 @@ import com.bluelinelabs.conductor.changehandler.HorizontalChangeHandler;
 import com.bluelinelabs.conductor.changehandler.VerticalChangeHandler;
 import com.kennyc.bottomsheet.BottomSheet;
 import com.nextcloud.talk.R;
-import com.nextcloud.talk.activities.CallActivity;
+import com.nextcloud.talk.activities.MagicCallActivity;
 import com.nextcloud.talk.adapters.items.ProgressItem;
 import com.nextcloud.talk.adapters.items.UserHeaderItem;
 import com.nextcloud.talk.adapters.items.UserItem;
@@ -295,7 +295,7 @@ public class ContactsController extends BaseController implements SearchView.OnQ
 
                         @Override
                         public void onNext(RoomOverall roomOverall) {
-                            Intent conversationIntent = new Intent(getActivity(), CallActivity.class);
+                            Intent conversationIntent = new Intent(getActivity(), MagicCallActivity.class);
                             Bundle bundle = new Bundle();
                             bundle.putString(BundleKeys.KEY_ROOM_TOKEN, roomOverall.getOcs().getData().getToken());
                             bundle.putString(BundleKeys.KEY_ROOM_ID, roomOverall.getOcs().getData().getRoomId());
@@ -828,7 +828,7 @@ public class ContactsController extends BaseController implements SearchView.OnQ
                             @Override
                             public void onNext(RoomOverall roomOverall) {
                                 if (getActivity() != null) {
-                                    Intent conversationIntent = new Intent(getActivity(), CallActivity.class);
+                                    Intent conversationIntent = new Intent(getActivity(), MagicCallActivity.class);
                                     Bundle bundle = new Bundle();
                                     bundle.putString(BundleKeys.KEY_ROOM_TOKEN, roomOverall.getOcs().getData().getToken());
                                     bundle.putString(BundleKeys.KEY_ROOM_ID, roomOverall.getOcs().getData().getRoomId());

app/src/main/java/com/nextcloud/talk/controllers/base/BaseController.java

@@ -92,7 +92,7 @@ public abstract class BaseController extends RefWatchingController {
     @Override
     protected void onAttach(@NonNull View view) {
         setTitle();
-        if (!MagicBottomNavigationController.class.getName().equals(getClass().getName())) {
+        if (!MagicBottomNavigationController.class.getName().equals(getClass().getName()) && getActionBar() != null) {
             getActionBar().setDisplayHomeAsUpEnabled(false);
         }
 

app/src/main/java/com/nextcloud/talk/controllers/bottomsheet/OperationsMenuController.java

@@ -40,7 +40,7 @@ import android.widget.TextView;
 import com.bluelinelabs.conductor.RouterTransaction;
 import com.bluelinelabs.conductor.changehandler.HorizontalChangeHandler;
 import com.nextcloud.talk.R;
-import com.nextcloud.talk.activities.CallActivity;
+import com.nextcloud.talk.activities.MagicCallActivity;
 import com.nextcloud.talk.api.NcApi;
 import com.nextcloud.talk.application.NextcloudTalkApplication;
 import com.nextcloud.talk.controllers.ChatController;
@@ -542,7 +542,7 @@ public class OperationsMenuController extends BaseController {
             eventBus.post(new BottomSheetLockEvent(true, 0,
                     true, true, dismissView));
 
-            Intent conversationIntent = new Intent(getActivity(), CallActivity.class);
+            Intent conversationIntent = new Intent(getActivity(), MagicCallActivity.class);
             bundle.putString(BundleKeys.KEY_ROOM_TOKEN, room.getToken());
             bundle.putString(BundleKeys.KEY_ROOM_ID, room.getRoomId());
             bundle.putString(BundleKeys.KEY_CONVERSATION_NAME, room.getDisplayName());
@@ -582,7 +582,7 @@ public class OperationsMenuController extends BaseController {
 
         if (getActivity() != null) {
 
-            Intent callIntent = new Intent(getActivity(), CallActivity.class);
+            Intent callIntent = new Intent(getActivity(), MagicCallActivity.class);
             callIntent.putExtras(bundle);
 
             InputMethodManager imm = (InputMethodManager) getActivity().getSystemService(Activity.INPUT_METHOD_SERVICE);

app/src/main/java/com/nextcloud/talk/jobs/NotificationJob.java

@@ -26,10 +26,7 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.graphics.Bitmap;
-import android.graphics.BitmapFactory;
-import android.media.MediaPlayer;
 import android.net.Uri;
-import android.os.Build;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.text.TextUtils;
@@ -40,14 +37,13 @@ import com.bluelinelabs.logansquare.LoganSquare;
 import com.evernote.android.job.Job;
 import com.evernote.android.job.util.support.PersistableBundleCompat;
 import com.nextcloud.talk.R;
-import com.nextcloud.talk.activities.CallActivity;
+import com.nextcloud.talk.activities.MagicCallActivity;
 import com.nextcloud.talk.activities.MainActivity;
 import com.nextcloud.talk.application.NextcloudTalkApplication;
 import com.nextcloud.talk.models.RingtoneSettings;
 import com.nextcloud.talk.models.SignatureVerification;
 import com.nextcloud.talk.models.json.push.DecryptedPushMessage;
 import com.nextcloud.talk.utils.ApplicationWideCurrentRoomHolder;
-import com.nextcloud.talk.utils.NotificationUtils;
 import com.nextcloud.talk.utils.PushUtils;
 import com.nextcloud.talk.utils.bundle.BundleKeys;
 import com.nextcloud.talk.utils.database.user.UserUtils;
@@ -59,8 +55,6 @@ import java.io.IOException;
 import java.security.InvalidKeyException;
 import java.security.NoSuchAlgorithmException;
 import java.security.PrivateKey;
-import java.util.Calendar;
-import java.util.zip.CRC32;
 
 import javax.crypto.Cipher;
 import javax.crypto.NoSuchPaddingException;
@@ -129,10 +123,11 @@ public class NotificationJob extends Job {
                             Bundle bundle = new Bundle();
 
 
-                            if (hasChatSupport) {
-                                intent = new Intent(context, MainActivity.class);
+                            boolean startACall = decryptedPushMessage.getType().equals("call") || !hasChatSupport;
+                            if (startACall) {
+                                intent = new Intent(context, MagicCallActivity.class);
                             } else {
-                                intent = new Intent(context, CallActivity.class);
+                                intent = new Intent(context, MainActivity.class);
                             }
 
                             intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
@@ -141,7 +136,7 @@ public class NotificationJob extends Job {
                                     .getUserEntity()));
 
                             bundle.putBoolean(BundleKeys.KEY_FROM_NOTIFICATION_START_CALL,
-                                    decryptedPushMessage.getType().equals("call") || !hasChatSupport);
+                                    startACall);
 
                             intent.putExtras(bundle);
 
@@ -154,8 +149,7 @@ public class NotificationJob extends Job {
                             String ringtonePreferencesString;
                             switch (decryptedPushMessage.getType()) {
                                 case "call":
-                                    smallIcon = R.drawable.ic_call_white_24dp;
-                                    category = Notification.CATEGORY_CALL;
+                                    getContext().startActivity(intent);
                                     break;
                                 case "room":
                                     smallIcon = R.drawable.ic_notifications_white_24dp;
@@ -183,7 +177,7 @@ public class NotificationJob extends Job {
                                     smallIcon = R.drawable.ic_logo;
                             }
 
-                            largeIcon = BitmapFactory.decodeResource(context.getResources(), smallIcon);
+                            /*largeIcon = BitmapFactory.decodeResource(context.getResources(), smallIcon);
                             CRC32 crc32 = new CRC32();
 
                             Notification.Builder notificationBuilder = new Notification.Builder(context)
@@ -258,7 +252,7 @@ public class NotificationJob extends Job {
                                     mediaPlayer.setOnCompletionListener(MediaPlayer::release);
 
                                 }
-                            }
+                            }*/
                         }
 
                     }

app/src/main/res/layout/activity_magic_call.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Nextcloud Talk application
+  ~
+  ~ @author Mario Danic
+  ~ Copyright (C) 2017-2018 Mario Danic <mario@lovelyhq.com>
+  ~
+  ~ This program is free software: you can redistribute it and/or modify
+  ~ it under the terms of the GNU General Public License as published by
+  ~ the Free Software Foundation, either version 3 of the License, or
+  ~ at your option) any later version.
+  ~
+  ~ This program is distributed in the hope that it will be useful,
+  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~ GNU General Public License for more details.
+  ~
+  ~ You should have received a copy of the GNU General Public License
+  ~ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                                                 android:layout_width="match_parent"
+                                                 android:layout_height="match_parent"
+                                                 xmlns:tools="http://schemas.android.com/tools"
+                                                 android:fitsSystemWindows="true"
+                                                 tools:context=".activities.MagicCallActivity">
+
+    <com.bluelinelabs.conductor.ChangeHandlerFrameLayout
+        android:id="@+id/controller_container"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+
+</RelativeLayout>

app/src/main/res/layout/controller_call.xml

@@ -0,0 +1,144 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Nextcloud Talk application
+  ~
+  ~ @author Mario Danic
+  ~ Copyright (C) 2017-2018 Mario Danic <mario@lovelyhq.com>
+  ~
+  ~ This program is free software: you can redistribute it and/or modify
+  ~ it under the terms of the GNU General Public License as published by
+  ~ the Free Software Foundation, either version 3 of the License, or
+  ~ at your option) any later version.
+  ~
+  ~ This program is distributed in the hope that it will be useful,
+  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~ GNU General Public License for more details.
+  ~
+  ~ You should have received a copy of the GNU General Public License
+  ~ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                xmlns:tools="http://schemas.android.com/tools"
+                android:id="@+id/relative_layout"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:background="@color/grey950"
+                android:fitsSystemWindows="true"
+                tools:context=".activities.CallActivity">
+
+    <RelativeLayout
+        android:id="@+id/connectingRelativeLayoutView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <ProgressBar
+            android:id="@+id/progress_bar"
+            android:layout_width="@dimen/item_height"
+            android:layout_height="@dimen/item_height"
+            android:layout_centerInParent="true"
+            android:layout_marginEnd="@dimen/activity_horizontal_margin"
+            android:layout_marginLeft="@dimen/activity_horizontal_margin"
+            android:layout_marginRight="@dimen/activity_horizontal_margin"
+            android:layout_marginStart="@dimen/activity_horizontal_margin"
+            android:indeterminate="true"
+            android:indeterminateTint="@color/colorPrimary"
+            android:indeterminateTintMode="src_in"/>
+
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/progress_bar"
+            android:layout_centerHorizontal="true"
+            android:layout_margin="16dp"
+            android:text="@string/nc_connecting_call"
+            android:textAlignment="center"
+            android:textColor="@color/white"/>
+
+    </RelativeLayout>
+
+    <RelativeLayout
+        android:id="@+id/conversationRelativeLayoutView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:visibility="invisible">
+
+        <LinearLayout
+            android:id="@+id/remote_renderers_layout"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:animateLayoutChanges="true"
+            android:background="@color/grey950"
+            android:orientation="vertical">
+        </LinearLayout>
+
+        <org.webrtc.SurfaceViewRenderer
+            android:id="@+id/pip_video_view"
+            android:layout_width="120dp"
+            android:layout_height="120dp"
+            android:layout_alignParentEnd="true"
+            android:layout_alignParentTop="true"
+            android:layout_margin="16dp"
+            android:visibility="invisible"/>
+    </RelativeLayout>
+
+    <LinearLayout
+        android:id="@+id/callControlsLinearLayoutView"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_centerHorizontal="true"
+        android:layout_marginBottom="16dp"
+        android:animateLayoutChanges="true"
+        android:background="@android:color/transparent"
+        android:gravity="center">
+
+        <com.nextcloud.talk.utils.MagicFlipView
+            xmlns:app="http://schemas.android.com/apk/res-auto"
+            android:id="@+id/call_control_microphone"
+            android:layout_width="60dp"
+            android:layout_height="60dp"
+            android:layout_marginEnd="20dp"
+            android:alpha="0.7"
+            app:checked="false"
+            app:enableInitialAnimation="false"
+            app:frontBackgroundColor="@color/colorPrimary"
+            app:frontImage="@drawable/ic_mic_off_white_24px"/>
+
+        <com.nextcloud.talk.utils.MagicFlipView
+            xmlns:app="http://schemas.android.com/apk/res-auto"
+            android:id="@+id/call_control_camera"
+            android:layout_width="60dp"
+            android:layout_height="60dp"
+            android:layout_marginEnd="20dp"
+            android:alpha="0.7"
+            app:checked="false"
+            app:enableInitialAnimation="false"
+            app:frontBackgroundColor="@color/colorPrimary"
+            app:frontImage="@drawable/ic_videocam_off_white_24px"/>
+
+        <com.nextcloud.talk.utils.MagicFlipView
+            xmlns:app="http://schemas.android.com/apk/res-auto"
+            android:id="@+id/call_control_switch_camera"
+            android:layout_width="60dp"
+            android:layout_height="60dp"
+            android:layout_marginEnd="20dp"
+            android:visibility="gone"
+            app:checked="false"
+            app:enableInitialAnimation="false"
+            app:frontBackgroundColor="@color/colorPrimary"
+            app:frontImage="@drawable/ic_switch_video_white_24px"/>
+
+        <com.nextcloud.talk.utils.MagicFlipView
+            xmlns:app="http://schemas.android.com/apk/res-auto"
+            android:id="@+id/call_control_hangup"
+            android:layout_width="60dp"
+            android:layout_height="60dp"
+            app:checked="false"
+            app:enableInitialAnimation="false"
+            app:frontBackgroundColor="@color/nc_darkRed"
+            app:frontImage="@drawable/ic_call_end_white_24px"/>
+    </LinearLayout>
+
+</RelativeLayout>

app/src/main/res/values/strings.xml

@@ -114,6 +114,7 @@
     <string name="nc_permissions_settings">Open settings</string>
 
     <!-- Call -->
+    <string name="nc_connecting_call">Connecting…</string>
     <string name="nc_incoming_call">Incoming call from</string>
     <string name="nc_nick_guest">Guest</string>
     <string name="nc_public_call">New public conversation</string>