Ensure correct google-services.json is supplied when building release APKs

app/build.gradle

@@ -1,7 +1,8 @@
+import groovy.json.JsonSlurper
+
 apply plugin: 'com.android.application'
 apply plugin: 'io.fabric'
 
-
 android {
     compileSdkVersion 27
 
@@ -34,6 +35,17 @@ android {
     }
 }
 
+tasks.whenTaskAdded { task ->
+    if (task.name.contains("assembleRelease")) {
+        task.getDependsOn().add({
+            def inputFile = new File("app/google-services.json")
+            def json = new JsonSlurper().parseText(inputFile.text)
+            if(json.project_info.project_id != "mthmmy-release-3aef0")
+                throw new GradleException('Please supply the correct google-services.json for release or manually change the id above!')
+        })
+    }
+}
+
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation 'com.android.support:appcompat-v7:27.1.1'
@@ -44,7 +56,7 @@ dependencies {
     implementation 'com.android.support:cardview-v7:27.1.1'
     implementation 'com.android.support:recyclerview-v7:27.1.1'
     implementation 'com.google.firebase:firebase-core:16.0.3'
-    implementation 'com.google.firebase:firebase-messaging:17.3.0'
+    implementation 'com.google.firebase:firebase-messaging:17.3.1'
     implementation 'com.crashlytics.sdk.android:crashlytics:2.9.5'
     implementation 'com.squareup.okhttp3:okhttp:3.10.0'
     implementation 'com.squareup.picasso:picasso:2.5.2'