Add FCM push notifications

app/build.gradle

@@ -38,6 +38,7 @@ ext {
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation 'com.android.support:support-v4:27.1.1'
+    implementation 'com.google.firebase:firebase-messaging:17.1.0'
     androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })

app/google-services.json

 {
   "project_info": {
-    "project_number": "306601329049",
-    "firebase_url": "https://iitb-app-5c0aa.firebaseio.com",
-    "project_id": "iitb-app-5c0aa",
-    "storage_bucket": "iitb-app-5c0aa.appspot.com"
+    "project_number": "259853447628",
+    "firebase_url": "https://astral-theory-207617.firebaseio.com",
+    "project_id": "astral-theory-207617",
+    "storage_bucket": "astral-theory-207617.appspot.com"
   },
   "client": [
     {
       "client_info": {
-        "mobilesdk_app_id": "1:306601329049:android:950a72a311331b9c",
+        "mobilesdk_app_id": "1:259853447628:android:efaea50ea28ccfec",
         "android_client_info": {
           "package_name": "app.insti"
         }
       },
       "oauth_client": [
         {
-          "client_id": "306601329049-6v597vrdv0nbi15ehpehq8hiaek8unqp.apps.googleusercontent.com",
+          "client_id": "259853447628-be3teletcqtfpfddj9qnk0bqj221h2mo.apps.googleusercontent.com",
           "client_type": 3
         }
       ],
       "api_key": [
         {
-          "current_key": "AIzaSyC1oThCMZN3JMnK6MUTJRjkp47q1K_gnTA"
+          "current_key": "AIzaSyB8B7N-3hnW_u4jOXHLRUzbMl6To3aDyJo"
         }
       ],
       "services": {

app/src/main/AndroidManifest.xml

@@ -76,23 +76,11 @@
         </receiver>
 
         <service
-            android:name="app.insti.gcm.MyGcmListenerService"
-            android:exported="false">
+            android:name=".InstiAppFirebaseMessagingService">
             <intent-filter>
-                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
+                <action android:name="com.google.firebase.MESSAGING_EVENT"/>
             </intent-filter>
         </service>
-        <service
-            android:name="app.insti.gcm.MyInstanceIDListenerService"
-            android:exported="false">
-            <intent-filter>
-                <action android:name="com.google.android.gms.iid.InstanceID" />
-            </intent-filter>
-        </service>
-        <service
-            android:name="app.insti.gcm.RegistrationIntentService"
-            android:exported="false"></service>
-
 
     </application>
 

app/src/main/java/app/insti/InstiAppFirebaseMessagingService.java

+package app.insti;
+
+import android.util.Log;
+
+import com.google.firebase.messaging.FirebaseMessagingService;
+import com.google.firebase.messaging.RemoteMessage;
+
+public class InstiAppFirebaseMessagingService extends FirebaseMessagingService {
+    @Override
+    public void onNewToken(String s) {
+        /* For future functionality */
+        super.onNewToken(s);
+    }
+
+    @Override
+    public void onMessageReceived(RemoteMessage remoteMessage) {
+        /* For future functionality */
+        super.onMessageReceived(remoteMessage);
+    }
+}

app/src/main/java/app/insti/LoginActivity.java

@@ -20,6 +20,7 @@ import android.widget.Toast;
 
 import com.google.android.gms.common.ConnectionResult;
 import com.google.android.gms.common.GoogleApiAvailability;
+import com.google.firebase.iid.FirebaseInstanceId;
 
 import app.insti.api.RetrofitInterface;
 import app.insti.api.ServiceGenerator;
@@ -142,8 +143,19 @@ public class LoginActivity extends AppCompatActivity {
             progressDialog.setIndeterminate(true);
             progressDialog.show();
         }
+
         RetrofitInterface retrofitInterface = ServiceGenerator.createService(RetrofitInterface.class);
-        retrofitInterface.passwordLogin(username, password).enqueue(new Callback<LoginResponse>() {
+        Call<LoginResponse> call;
+
+        /* This can be null if play services is hung */
+        if (FirebaseInstanceId.getInstance().getToken() == null) {
+            call = retrofitInterface.passwordLogin(username, password);
+        } else {
+            call = retrofitInterface.passwordLogin(username, password, FirebaseInstanceId.getInstance().getToken());
+        }
+
+        /* Log in the user */
+        call.enqueue(new Callback<LoginResponse>() {
             @Override
             public void onResponse(Call<LoginResponse> call, Response<LoginResponse> response) {
                 if (response.isSuccessful()) {

app/src/main/java/app/insti/api/RetrofitInterface.java

@@ -29,6 +29,9 @@ public interface RetrofitInterface {
     @GET("pass-login")
     Call<LoginResponse> passwordLogin(@Query("username") String username, @Query("password") String password);
 
+    @GET("pass-login")
+    Call<LoginResponse> passwordLogin(@Query("username") String username, @Query("password") String password, @Query("fcm_id") String fcmId);
+
     @POST("events")
     Call<EventCreateResponse> createEvent(@Header("Cookie") String sessionId, @Body EventCreateRequest eventCreateRequest);