Check DND for speak/sound

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

@@ -906,7 +906,7 @@ public class EntityRule {
             @Override
             public void run() {
                 try {
-                    if (MediaPlayerHelper.isInCall(context))
+                    if (MediaPlayerHelper.isInCall(context) || MediaPlayerHelper.isDnd(context))
                         return;
                     speak(context, EntityRule.this, message);
                 } catch (Throwable ex) {

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

@@ -2688,6 +2688,10 @@ public class Log {
                         Helper.getInterruptionFilter(filter),
                         (filter == NotificationManager.INTERRUPTION_FILTER_ALL ? "" : "!!!")));
 
+                size += write(os, String.format("InCall=%b DND=%b\r\n\r\n",
+                        MediaPlayerHelper.isInCall(context),
+                        MediaPlayerHelper.isDnd(context)));
+
                 for (NotificationChannel channel : nm.getNotificationChannels())
                     try {
                         JSONObject jchannel = NotificationHelper.channelToJSON(channel);

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

@@ -1,5 +1,6 @@
 package eu.faircode.email;
 
+import android.app.NotificationManager;
 import android.content.Context;
 import android.media.AudioAttributes;
 import android.media.AudioManager;
@@ -38,8 +39,9 @@ public class MediaPlayerHelper {
             @Override
             public void run() {
                 try {
-                    if (!isInCall(context))
-                        play(context, uri, alarm, duration);
+                    if (isInCall(context) || isDnd(context))
+                        return;
+                    play(context, uri, alarm, duration);
                 } catch (Throwable ex) {
                     Log.e(ex);
                 }
@@ -146,6 +148,15 @@ public class MediaPlayerHelper {
         }
     }
 
+    static boolean isDnd(Context context) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M)
+            return false;
+        NotificationManager nm = Helper.getSystemService(context, NotificationManager.class);
+        int filter = nm.getCurrentInterruptionFilter();
+        // All: no notifications are suppressed
+        return (filter != NotificationManager.INTERRUPTION_FILTER_ALL);
+    }
+
     static boolean isInCall(int mode) {
         return (mode == AudioManager.MODE_RINGTONE ||
                 mode == AudioManager.MODE_IN_CALL ||