From 4a163b01164de0f6e9a27bc079d9d22e1b96ca11 Mon Sep 17 00:00:00 2001
From: Swapnil Tripathi <swapnil06.st@gmail.com>
Date: Fri, 6 Aug 2021 15:08:57 +0530
Subject: [PATCH] Implemented native call to the android MediaSession.

---
 android/AndroidManifest.xml                 |  2 +-
 android/src/org/kde/kasts/MediaService.java | 27 ++++++++++++++++++
 src/CMakeLists.txt                          |  1 +
 src/audiomanager.cpp                        |  3 ++
 src/mediasessionclient.cpp                  | 31 +++++++++++++++++++--
 src/mediasessionclient.h                    | 14 ++++++++--
 6 files changed, 73 insertions(+), 5 deletions(-)

diff --git a/android/AndroidManifest.xml b/android/AndroidManifest.xml
index 4dde538f..6b8960b4 100644
--- a/android/AndroidManifest.xml
+++ b/android/AndroidManifest.xml
@@ -7,7 +7,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           package="org.kde.kasts"
           android:versionName="0.0.1"
-          android:versionCode="1628121202"
+          android:versionCode="1628239323"
           android:installLocation="auto">
 
     <supports-screens android:largeScreens="true" android:normalScreens="true" android:anyDensity="true" android:smallScreens="true"/>
diff --git a/android/src/org/kde/kasts/MediaService.java b/android/src/org/kde/kasts/MediaService.java
index 840c6005..69a8169c 100644
--- a/android/src/org/kde/kasts/MediaService.java
+++ b/android/src/org/kde/kasts/MediaService.java
@@ -18,7 +18,33 @@ import android.util.Log;
 
 public class MediaService extends Service {
     public static final String TAG = "MediaService";
+
     private MediaSessionCompat mSession;
+    private PlaybackStateCompat.Builder mPBuilder;
+
+    public void setSessionState(int state)
+    {
+        switch(state) {
+            case 0: {
+                mPBuilder.setActions(PlaybackStateCompat.ACTION_PAUSE | PlaybackStateCompat.ACTION_STOP);
+                mPBuilder.setState(PlaybackStateCompat.STATE_PLAYING,
+                        0, 1.0f);
+                mSession.setPlaybackState(mPBuilder.build());
+            }
+            case 1: {
+                mPBuilder.setActions(PlaybackStateCompat.ACTION_PLAY | PlaybackStateCompat.ACTION_STOP);
+                mPBuilder.setState(PlaybackStateCompat.STATE_PAUSED,
+                        0, 1.0f);
+                mSession.setPlaybackState(mPBuilder.build());
+            }
+            case 2: {
+                mPBuilder.setActions(PlaybackStateCompat.ACTION_PAUSE | PlaybackStateCompat.ACTION_STOP);
+                mPBuilder.setState(PlaybackStateCompat.STATE_STOPPED,
+                        0, 1.0f);
+                mSession.setPlaybackState(mPBuilder.build());
+            }
+        }
+    }
 
     private class MediaSessionCallback extends MediaSessionCompat.Callback {
         private Context mContext;
@@ -66,6 +92,7 @@ public class MediaService extends Service {
                 MediaSessionCompat.FLAG_HANDLES_QUEUE_COMMANDS |
                 MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
         mSession.setCallback(new MediaSessionCallback(this));
+        mPBuilder = new PlaybackStateCompat.Builder();
     }
 
     @Override
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 0cf194d6..fcda503d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -30,6 +30,7 @@ set(SRCS_base
     models/downloadmodel.cpp
     models/errorlogmodel.cpp
     models/podcastsearchmodel.cpp
+    mediasessionclient.cpp
     mpris2/mpris2.cpp
     powermanagementinterface.cpp
     sync/sync.cpp
diff --git a/src/audiomanager.cpp b/src/audiomanager.cpp
index 7450a3a3..ebfcb367 100644
--- a/src/audiomanager.cpp
+++ b/src/audiomanager.cpp
@@ -23,6 +23,7 @@
 #include "models/errorlogmodel.h"
 #include "powermanagementinterface.h"
 #include "settingsmanager.h"
+#include "mediasessionclient.h"
 
 class AudioManagerPrivate
 {
@@ -73,6 +74,8 @@ AudioManager::AudioManager(QObject *parent)
 
     connect(this, &AudioManager::logError, &ErrorLogModel::instance(), &ErrorLogModel::monitorErrorMessages);
 
+    MediaSessionClient mClient(this);
+
     // Check if an entry was playing when the program was shut down and restore it
     if (DataManager::instance().lastPlayingEntry() != QStringLiteral("none")) {
         setEntry(DataManager::instance().getEntry(DataManager::instance().lastPlayingEntry()));
diff --git a/src/mediasessionclient.cpp b/src/mediasessionclient.cpp
index 3cdabbaa..db7e889c 100644
--- a/src/mediasessionclient.cpp
+++ b/src/mediasessionclient.cpp
@@ -8,9 +8,36 @@
 #include "audiomanager.h"
 
 #include <QtAndroid>
+#include <qDebug>
 
-MediaSessionClient::MediaSessionClient(QObject *parent)
+MediaSessionClient::MediaSessionClient(AudioManager *audioPlayer, QObject *parent)
     : QObject(parent)
+    , m_audioPlayer(audioPlayer)
 {
-    //connections to be added here.
+    connect(m_audioPlayer, &AudioManager::playbackStateChanged, this, &MediaSessionClient::setState);
+}
+
+void MediaSessionClient::setState()
+{
+    QDebug() << m_audioPlayer->playbackState();
+    switch(m_audioPlayer->playbackState()) {
+        case QMediaPlayer::StoppedState :
+            QAndroidJniObject::callStaticMethod<jint>
+                                ("org/kde/kasts/MediaService"
+                                , "setSessionState"
+                                , "(I)I"
+                                , 2);
+        case QMediaPlayer::PausedState :
+            QAndroidJniObject::callStaticMethod<jint>
+                                ("org/kde/kasts/MediaService"
+                                , "setSessionState"
+                                , "(I)I"
+                                , 1);
+        case QMediaPlayer::PlayingState :
+            QAndroidJniObject::callStaticMethod<jint>
+                                ("org/kde/kasts/MediaService"
+                                , "setSessionState"
+                                , "(I)I"
+                                , 0);
+    }
 }
diff --git a/src/mediasessionclient.h b/src/mediasessionclient.h
index 023e7421..f3dba394 100644
--- a/src/mediasessionclient.h
+++ b/src/mediasessionclient.h
@@ -6,8 +6,18 @@
 
 #pragma once
 
-class MediaSessionClient
+#include <QObject>
+
+class AudioManager;
+
+class MediaSessionClient : public QObject
 {
 public:
-    explicit MediaSessionClient(QObject *parent = nullptr);
+    explicit MediaSessionClient(AudioManager *audioPlayer, QObject *parent = nullptr);
+
+private Q_SLOTS:
+    void setState();
+
+private:
+    AudioManager *m_audioPlayer = nullptr;
 };