Check if in-call via audio manager

app/src/main/java/eu/faircode/email/EntityRule.java

@@ -822,6 +822,9 @@ public class EntityRule {
     private boolean onActionTts(Context context, EntityMessage message, JSONObject jargs) {
         DB db = DB.getInstance(context);
 
+        if (message.ui_seen)
+            return false;
+
         if (!message.content) {
             EntityOperation.queue(context, message, EntityOperation.BODY);
             EntityOperation.queue(context, message, EntityOperation.RULE, this.id);
@@ -832,6 +835,8 @@ public class EntityRule {
             @Override
             public void run() {
                 try {
+                    if (MediaPlayerHelper.isInCall(context))
+                        return;
                     speak(context, EntityRule.this, message);
                 } catch (Throwable ex) {
                     db.message().setMessageError(message.id, Log.formatThrowable(ex));
@@ -974,6 +979,8 @@ public class EntityRule {
             @Override
             public void run() {
                 try {
+                    if (MediaPlayerHelper.isInCall(context))
+                        return;
                     MediaPlayerHelper.play(context, uri, alarm, duration);
                 } catch (Throwable ex) {
                     Log.e(ex);

app/src/main/java/eu/faircode/email/MediaPlayerHelper.java

@@ -2,6 +2,7 @@ package eu.faircode.email;
 
 import android.content.Context;
 import android.media.AudioAttributes;
+import android.media.AudioManager;
 import android.media.MediaPlayer;
 import android.net.Uri;
 
@@ -49,4 +50,18 @@ public class MediaPlayerHelper {
             Log.w(ex);
         }
     }
+
+    static boolean isInCall(Context context) {
+        AudioManager am =
+                (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
+        if (am == null)
+            return false;
+
+        // This doesn't require READ_PHONE_STATE permission
+        int mode = am.getMode();
+        EntityLog.log(context, "Audio mode=" + mode);
+        return (mode == AudioManager.MODE_RINGTONE ||
+                mode == AudioManager.MODE_IN_CALL ||
+                mode == AudioManager.MODE_IN_COMMUNICATION);
+    }
 }