allow to decline calls and remove call notification

src/main/AndroidManifest.xml

@@ -447,6 +447,14 @@
         </intent-filter>
     </receiver>
 
+    <receiver android:name=".notifications.DeclineCallReceiver"
+              android:enabled="true"
+              android:exported="false">
+        <intent-filter>
+            <action android:name="org.thoughtcrime.securesms.notifications.DECLINE_CALL_NOTICED"/>
+        </intent-filter>
+    </receiver>
+
     <receiver android:name=".notifications.RemoteReplyReceiver"
               android:enabled="true"
               android:exported="false">

src/main/java/org/thoughtcrime/securesms/connect/DcEventCenter.java

@@ -187,6 +187,10 @@ public class DcEventCenter {
         DcHelper.getNotificationCenter(context).notifyCall(accountId, event.getData1Int(), event.getData2Str());
         break;
 
+      case DcContext.DC_EVENT_CALL_ENDED:
+        DcHelper.getNotificationCenter(context).removeCallNotification(accountId, event.getData1Int());
+        break;
+
       case DcContext.DC_EVENT_MSGS_NOTICED:
         DcHelper.getNotificationCenter(context).removeNotifications(accountId, event.getData1Int());
         break;

src/main/java/org/thoughtcrime/securesms/notifications/DeclineCallReceiver.java

@@ -0,0 +1,37 @@
+// called when the user click the "clear" or "mark read" button in the system notification
+
+package org.thoughtcrime.securesms.notifications;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+import com.b44t.messenger.DcContext;
+
+import org.thoughtcrime.securesms.connect.DcHelper;
+import org.thoughtcrime.securesms.util.Util;
+
+public class DeclineCallReceiver extends BroadcastReceiver {
+  public static final  String DECLINE_ACTION   = "org.thoughtcrime.securesms.notifications.DECLINE_CALL";
+  public static final  String ACCOUNT_ID_EXTRA      = "account_id";
+  public static final  String CALL_ID_EXTRA          = "call_id";
+
+  @Override
+  public void onReceive(final Context context, Intent intent) {
+    if (!DECLINE_ACTION.equals(intent.getAction())) {
+      return;
+    }
+
+    final int accountId = intent.getIntExtra(ACCOUNT_ID_EXTRA, 0);
+    final int callId = intent.getIntExtra(CALL_ID_EXTRA, 0);
+    if (accountId == 0) {
+      return;
+    }
+
+    Util.runOnAnyBackgroundThread(() -> {
+      DcHelper.getNotificationCenter(context).removeCallNotification(accountId, callId);
+      DcContext dcContext = DcHelper.getAccounts(context).getAccount(accountId);
+      dcContext.endCall(callId);
+    });
+  }
+}

src/main/java/org/thoughtcrime/securesms/notifications/NotificationCenter.java

@@ -174,6 +174,15 @@ public class NotificationCenter {
                 .getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT | IntentUtils.FLAG_MUTABLE());
     }
 
+    private PendingIntent getDeclineCallIntent(ChatData chatData, int callId) {
+        Intent intent = new Intent(DeclineCallReceiver.DECLINE_ACTION);
+        intent.setClass(context, DeclineCallReceiver.class);
+        intent.putExtra(DeclineCallReceiver.ACCOUNT_ID_EXTRA, chatData.accountId);
+        intent.putExtra(DeclineCallReceiver.CALL_ID_EXTRA, callId);
+        intent.setPackage(context.getPackageName());
+        return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT | IntentUtils.FLAG_MUTABLE());
+    }
+
     // Groups and Notification channel groups
     // --------------------------------------------------------------------------------------------
 
@@ -407,6 +416,8 @@ public class NotificationCenter {
         ChatData chatData = new ChatData(accId, chatId);
         String notificationChannel = getCallNotificationChannel(notificationManager, chatData, name);
 
+        PendingIntent declineCallIntent = getDeclineCallIntent(chatData, callId);
+
         NotificationCompat.Builder builder = new NotificationCompat.Builder(context, notificationChannel)
           .setSmallIcon(R.drawable.icon_notification)
           .setColor(context.getResources().getColor(R.color.delta_primary))
@@ -417,9 +428,13 @@ public class NotificationCenter {
           .setTicker(name)
           .setContentTitle(name)
           .setContentText("Incoming Call")
-          ;
-          //                    .setDeleteIntenta(getMarkAsReadIntent(chatData, msgId, false))
-        //                    .setContentIntent(getOpenChatIntent(chatData));
+          .setDeleteIntent(declineCallIntent);
+
+        builder.addAction(
+          new NotificationCompat.Action.Builder(
+            R.drawable.baseline_call_end_24,
+            context.getString(R.string.end_call),
+            declineCallIntent).build());
 
         builder.addAction(
           new NotificationCompat.Action.Builder(
@@ -437,7 +452,7 @@ public class NotificationCenter {
         // add notification, we use one notification per chat,
         // esp. older android are not that great at grouping
         try {
-          notificationManager.notify(String.valueOf(accId), ID_MSG_OFFSET + chatId, notif);
+          notificationManager.notify("call-" + accId, callId, notif);
         } catch (Exception e) {
           Log.e(TAG, "cannot add notification", e);
         }
@@ -732,6 +747,14 @@ public class NotificationCenter {
       return null;
     }
 
+    public void removeCallNotification(int accountId, int callId) {
+        try {
+            NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
+            String tag = "call-" + accountId;
+            notificationManager.cancel(tag, callId);
+        } catch (Exception e) { Log.w(TAG, e); }
+    }
+
     public void removeNotifications(int accountId, int chatId) {
         boolean removeSummary;
         synchronized (inboxes) {

src/main/java/org/thoughtcrime/securesms/videochat/VideochatActivity.java

@@ -44,7 +44,9 @@ public class VideochatActivity extends WebViewActivity implements DcEventCenter.
     chatId = bundle.getInt(EXTRA_CHAT_ID, 0);
     callId = bundle.getInt(EXTRA_CALL_ID, 0);
     int accId = bundle.getInt(EXTRA_ACCOUNT_ID, -1);
-    this.dcContext = DcHelper.getAccounts(getApplicationContext()).getAccount(accId);
+    this.dcContext = DcHelper.getAccounts(this).getAccount(accId);
+
+    DcHelper.getNotificationCenter(this).removeCallNotification(accId, callId);
 
     WebSettings webSettings = webView.getSettings();
     webSettings.setJavaScriptEnabled(true);

src/main/res/drawable/baseline_call_end_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#FFFFFF" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M12,9c-1.6,0 -3.15,0.25 -4.6,0.72v3.1c0,0.39 -0.23,0.74 -0.56,0.9 -0.98,0.49 -1.87,1.12 -2.66,1.85 -0.18,0.18 -0.43,0.28 -0.7,0.28 -0.28,0 -0.53,-0.11 -0.71,-0.29L0.29,13.08c-0.18,-0.17 -0.29,-0.42 -0.29,-0.7 0,-0.28 0.11,-0.53 0.29,-0.71C3.34,8.78 7.46,7 12,7s8.66,1.78 11.71,4.67c0.18,0.18 0.29,0.43 0.29,0.71 0,0.28 -0.11,0.53 -0.29,0.71l-2.48,2.48c-0.18,0.18 -0.43,0.29 -0.71,0.29 -0.27,0 -0.52,-0.11 -0.7,-0.28 -0.79,-0.74 -1.69,-1.36 -2.67,-1.85 -0.33,-0.16 -0.56,-0.5 -0.56,-0.9v-3.1C15.15,9.25 13.6,9 12,9z"/>
+    
+</vector>