add Firebase Cloud Messaging support (#702)

* add Firebase Cloud Messaging support
* add default notification channel for FCM

buildozer.spec.arm.ci

@@ -148,7 +148,7 @@ android.react_src = ./app
 
 # (list) Gradle dependencies to add (currently works only with sdl2_gradle
 # bootstrap)
-android.gradle_dependencies = com.android.support:support-v4:28.0.0, com.android.support:support-media-compat:28.0.0, com.android.support:appcompat-v7:28.0.0, com.facebook.react:react-native:0.59.10, com.google.android.gms:play-services-gcm:11.0.4+, com.facebook.fresco:fresco:1.9.0, com.facebook.fresco:animated-gif:1.9.0, com.squareup.picasso:picasso:2.71828, com.google.firebase:firebase-core:16.0.1, com.google.android.gms:play-services-base:16.1.0, com.android.support:exifinterface:28.0.0, com.facebook.fresco:animated-base-support:1.3.0, com.facebook.fresco:animated-gif:1.10.0
+android.gradle_dependencies = com.android.support:support-v4:28.0.0, com.android.support:support-media-compat:28.0.0, com.android.support:appcompat-v7:28.0.0, com.facebook.react:react-native:0.59.10, com.google.android.gms:play-services-gcm:11.0.4+, com.facebook.fresco:fresco:1.9.0, com.facebook.fresco:animated-gif:1.9.0, com.squareup.picasso:picasso:2.71828, com.google.firebase:firebase-core:16.0.1, com.google.android.gms:play-services-base:16.1.0, com.android.support:exifinterface:28.0.0, com.facebook.fresco:animated-base-support:1.3.0, com.facebook.fresco:animated-gif:1.10.0, com.google.firebase:firebase-messaging:18.0.0
 
 # (str) python-for-android branch to use, defaults to master
 #p4a.branch = stable

buildozer.spec.arm64.ci

@@ -148,7 +148,7 @@ android.react_src = ./app
 
 # (list) Gradle dependencies to add (currently works only with sdl2_gradle
 # bootstrap)
-android.gradle_dependencies = com.android.support:support-v4:28.0.0, com.android.support:support-media-compat:28.0.0, com.android.support:appcompat-v7:28.0.0, com.facebook.react:react-native:0.59.10, com.google.android.gms:play-services-gcm:11.0.4+, com.facebook.fresco:fresco:1.9.0, com.facebook.fresco:animated-gif:1.9.0, com.squareup.picasso:picasso:2.71828, com.google.firebase:firebase-core:16.0.1, com.google.android.gms:play-services-base:16.1.0, com.android.support:exifinterface:28.0.0, com.facebook.fresco:animated-base-support:1.3.0, com.facebook.fresco:animated-gif:1.10.0
+android.gradle_dependencies = com.android.support:support-v4:28.0.0, com.android.support:support-media-compat:28.0.0, com.android.support:appcompat-v7:28.0.0, com.facebook.react:react-native:0.59.10, com.google.android.gms:play-services-gcm:11.0.4+, com.facebook.fresco:fresco:1.9.0, com.facebook.fresco:animated-gif:1.9.0, com.squareup.picasso:picasso:2.71828, com.google.firebase:firebase-core:16.0.1, com.google.android.gms:play-services-base:16.1.0, com.android.support:exifinterface:28.0.0, com.facebook.fresco:animated-base-support:1.3.0, com.facebook.fresco:animated-gif:1.10.0, com.google.firebase:firebase-messaging:18.0.0
 
 # (str) python-for-android branch to use, defaults to master
 #p4a.branch = stable

buildozer.spec.sample

@@ -148,7 +148,7 @@ android.react_src = ./app
 
 # (list) Gradle dependencies to add (currently works only with sdl2_gradle
 # bootstrap)
-android.gradle_dependencies = com.android.support:support-v4:28.0.0, com.android.support:support-media-compat:28.0.0, com.android.support:appcompat-v7:28.0.0, com.facebook.react:react-native:0.59.10, com.google.android.gms:play-services-gcm:11.0.4+, com.facebook.fresco:fresco:1.9.0, com.facebook.fresco:animated-gif:1.9.0, com.squareup.picasso:picasso:2.71828, com.google.firebase:firebase-core:16.0.1, com.google.android.gms:play-services-base:16.1.0, com.android.support:exifinterface:28.0.0, com.facebook.fresco:animated-base-support:1.3.0, com.facebook.fresco:animated-gif:1.10.0
+android.gradle_dependencies = com.android.support:support-v4:28.0.0, com.android.support:support-media-compat:28.0.0, com.android.support:appcompat-v7:28.0.0, com.facebook.react:react-native:0.59.10, com.google.android.gms:play-services-gcm:11.0.4+, com.facebook.fresco:fresco:1.9.0, com.facebook.fresco:animated-gif:1.9.0, com.squareup.picasso:picasso:2.71828, com.google.firebase:firebase-core:16.0.1, com.google.android.gms:play-services-base:16.1.0, com.android.support:exifinterface:28.0.0, com.facebook.fresco:animated-base-support:1.3.0, com.facebook.fresco:animated-gif:1.10.0, com.google.firebase:firebase-messaging:18.0.0
 
 # (str) python-for-android branch to use, defaults to master
 #p4a.branch = stable

buildozer.spec.vagrant

@@ -148,7 +148,7 @@ android.react_src = ./app
 
 # (list) Gradle dependencies to add (currently works only with sdl2_gradle
 # bootstrap)
-android.gradle_dependencies = com.android.support:support-v4:28.0.0, com.android.support:support-media-compat:28.0.0, com.android.support:appcompat-v7:28.0.0, com.facebook.react:react-native:0.59.10, com.google.android.gms:play-services-gcm:11.0.4+, com.facebook.fresco:fresco:1.9.0, com.facebook.fresco:animated-gif:1.9.0, com.squareup.picasso:picasso:2.71828, com.google.firebase:firebase-core:16.0.1, com.google.android.gms:play-services-base:16.1.0, com.android.support:exifinterface:28.0.0, com.facebook.fresco:animated-base-support:1.3.0, com.facebook.fresco:animated-gif:1.10.0
+android.gradle_dependencies = com.android.support:support-v4:28.0.0, com.android.support:support-media-compat:28.0.0, com.android.support:appcompat-v7:28.0.0, com.facebook.react:react-native:0.59.10, com.google.android.gms:play-services-gcm:11.0.4+, com.facebook.fresco:fresco:1.9.0, com.facebook.fresco:animated-gif:1.9.0, com.squareup.picasso:picasso:2.71828, com.google.firebase:firebase-core:16.0.1, com.google.android.gms:play-services-base:16.1.0, com.android.support:exifinterface:28.0.0, com.facebook.fresco:animated-base-support:1.3.0, com.facebook.fresco:animated-gif:1.10.0, com.google.firebase:firebase-messaging:18.0.0
 
 # (str) python-for-android branch to use, defaults to master
 #p4a.branch = stable

p4a/pythonforandroid/bootstraps/lbry/build/templates/AndroidManifest.tmpl.xml

@@ -58,6 +58,16 @@
                  android:hardwareAccelerated="true"
                  android:usesCleartextTraffic="true">
 
+        <meta-data
+            android:name="com.google.firebase.messaging.default_notification_icon"
+            android:resource="@drawable/ic_lbry" />
+        <meta-data
+            android:name="com.google.firebase.messaging.default_notification_color"
+            android:resource="@color/lbryGreen" />
+        <meta-data
+            android:name="com.google.firebase.messaging.default_notification_channel_id"
+            android:value="@string/default_notification_channel_id"/>
+
         {% for m in args.meta_data %}
         <meta-data android:name="{{ m.split('=', 1)[0] }}" android:value="{{ m.split('=', 1)[-1] }}"/>{% endfor %}
         <meta-data android:name="wakelock" android:value="{% if args.wakelock %}1{% else %}0{% endif %}"/>
@@ -131,6 +141,14 @@
 		<service android:name="{{ args.package }}.LbrynetTestRunnerService"
 				 android:process=":service_lbrynet_testrunner" />
 
+        <service
+            android:name="{{ args.package }}.LbrynetMessagingService"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="com.google.firebase.MESSAGING_EVENT" />
+            </intent-filter>
+        </service>
+
         {% if args.billing_pubkey %}
         <service android:name="org.kivy.android.billing.BillingReceiver"
                  android:process=":pythonbilling" />

p4a/pythonforandroid/bootstraps/lbry/build/templates/strings.tmpl.xml

@@ -4,6 +4,7 @@
     <string name="private_version">{{ private_version }}</string>
     <string name="presplash_color">{{ args.presplash_color }}</string>
     <string name="urlScheme">{{ url_scheme }}</string>
+    <string name="default_notification_channel_id">io.lbry.browser.LBRY_ENGAGEMENT_CHANNEL</string>
 
     <string name="running">Running</string>
     <string name="service_status">Service Status</string>

src/main/java/io/lbry/browser/LbrynetMessagingService.java

@@ -0,0 +1,93 @@
+package io.lbry.browser;
+
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.media.RingtoneManager;
+import android.net.Uri;
+import android.os.Build;
+import android.support.v4.app.NotificationCompat;
+import android.support.v4.content.ContextCompat;
+import android.util.Log;
+
+import com.google.firebase.messaging.FirebaseMessagingService;
+import com.google.firebase.messaging.RemoteMessage;
+
+public class LbrynetMessagingService extends FirebaseMessagingService {
+
+    private static final String TAG = "LbrynetMessagingService";
+
+    private static final String NOTIFICATION_CHANNEL_ID = "io.lbry.browser.LBRY_ENGAGEMENT_CHANNEL";
+
+    @Override
+    public void onMessageReceived(RemoteMessage remoteMessage) {
+        Log.d(TAG, "From: " + remoteMessage.getFrom());
+
+        // Check if message contains a notification payload.
+        RemoteMessage.Notification remoteNotification = remoteMessage.getNotification();
+        if (remoteNotification != null) {
+            Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
+            sendNotification(remoteNotification.getTitle(), remoteNotification.getBody());
+        }
+    }
+
+    @Override
+    public void onNewToken(String token) {
+        Log.d(TAG, "Refreshed token: " + token);
+
+        // If you want to send messages to this application instance or
+        // manage this apps subscriptions on the server side, send the
+        // Instance ID token to your app server.
+        sendRegistrationToServer(token);
+    }
+
+    /**
+     * Persist token to third-party servers.
+     *
+     * Modify this method to associate the user's FCM InstanceID token with any server-side account
+     * maintained by your application.
+     *
+     * @param token The new token.
+     */
+    private void sendRegistrationToServer(String token) {
+        // TODO: Implement this method to send token to your app server.
+    }
+
+     /**
+     * Create and show a simple notification containing the received FCM message.
+     *
+     * @param messageBody FCM message body received.
+     */
+    private void sendNotification(String title, String messageBody) {
+        Intent intent = new Intent(this, MainActivity.class);
+        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+        // TODO: Update pending intent based on notification data (eg. open a LBRY URI or the Rewards page?)
+        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
+                PendingIntent.FLAG_ONE_SHOT);
+
+        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
+        NotificationCompat.Builder notificationBuilder =
+                new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
+                        .setColor(ContextCompat.getColor(this, R.color.lbryGreen))
+                        .setSmallIcon(R.drawable.ic_lbry)
+                        .setContentTitle(title)
+                        .setContentText(messageBody)
+                        .setAutoCancel(true)
+                        .setSound(defaultSoundUri)
+                        .setContentIntent(pendingIntent);
+
+        NotificationManager notificationManager =
+                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+
+        // Since android Oreo notification channel is needed.
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            NotificationChannel channel = new NotificationChannel(
+                NOTIFICATION_CHANNEL_ID, "LBRY Engagement", NotificationManager.IMPORTANCE_DEFAULT);
+            notificationManager.createNotificationChannel(channel);
+        }
+
+        notificationManager.notify(9898, notificationBuilder.build());
+    }
+}

src/main/java/io/lbry/browser/reactmodules/FirebaseModule.java

@@ -11,6 +11,10 @@ import com.facebook.react.bridge.ReactContextBaseJavaModule;
 import com.facebook.react.bridge.ReactMethod;
 import com.facebook.react.bridge.ReadableMap;
 import com.google.firebase.analytics.FirebaseAnalytics;
+import com.google.android.gms.tasks.OnCompleteListener;
+import com.google.android.gms.tasks.Task;
+import com.google.firebase.iid.FirebaseInstanceId;
+import com.google.firebase.iid.InstanceIdResult;
 
 import io.lbry.browser.BuildConfig;
 import io.lbry.browser.MainActivity;
@@ -86,4 +90,22 @@ public class FirebaseModule extends ReactContextBaseJavaModule {
                             Toast.LENGTH_LONG).show();
         }
     }
+
+    @ReactMethod
+    public void getMessagingToken(final Promise promise) {
+        FirebaseInstanceId.getInstance().getInstanceId()
+            .addOnCompleteListener(new OnCompleteListener<InstanceIdResult>() {
+                @Override
+                public void onComplete(Task<InstanceIdResult> task) {
+                    if (!task.isSuccessful()) {
+                        promise.reject("getInstanceId failed");
+                        return;
+                    }
+
+                    // Get new Instance ID token
+                    String token = task.getResult().getToken();
+                    promise.resolve(token);
+                }
+            });
+    }
 }