Replaced recurring background fetch with Firebase solution including broadcast function

app/src/main/AndroidManifest.xml

@@ -37,9 +37,20 @@
         </activity>
 
         <service
-            android:name=".NotificationService"
-            android:permission="android.permission.BIND_JOB_SERVICE"
-            android:required="true"/>
+            android:name=".FBNotificationService"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="com.google.firebase.MESSAGING_EVENT" />
+            </intent-filter>
+        </service>
+
+        <meta-data
+            android:name="com.google.firebase.messaging.default_notification_icon"
+            android:resource="@drawable/ic_avhlogo" />
+        <meta-data
+            android:name="com.google.firebase.messaging.default_notification_color"
+            android:resource="@color/colorAccent" />
+
     </application>
 
 </manifest>

app/src/main/java/com/denizd/substitutionplan/FBNotificationService.kt

@@ -0,0 +1,11 @@
+package com.denizd.substitutionplan
+
+import com.google.firebase.messaging.FirebaseMessagingService
+import com.google.firebase.messaging.RemoteMessage
+
+class FBNotificationService : FirebaseMessagingService() {
+
+    override fun onMessageReceived(p0: RemoteMessage?) {
+        DataFetcher(true, true, true, this, application, null).execute()
+    }
+}

app/src/main/java/com/denizd/substitutionplan/Main.kt

@@ -9,8 +9,10 @@ import android.content.SharedPreferences
 import android.os.Build
 import android.os.Bundle
 import android.preference.PreferenceManager
+import android.util.Log
 import android.view.*
 import android.widget.TextView
+import android.widget.Toast
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.app.AppCompatDelegate
@@ -22,6 +24,8 @@ import androidx.recyclerview.widget.RecyclerView
 import com.google.android.material.appbar.AppBarLayout
 import com.google.android.material.bottomnavigation.BottomNavigationView
 import com.google.android.material.snackbar.Snackbar
+import com.google.firebase.FirebaseApp
+import com.google.firebase.messaging.FirebaseMessaging
 import com.jaredrummler.android.device.DeviceName
 import java.lang.IllegalArgumentException
 import java.util.*
@@ -51,6 +55,15 @@ class Main : AppCompatActivity(R.layout.app_bar_main) {
             edit.putInt("launchDev", prefs.getInt("launchDev", 0) + 1)
             edit.apply()
 
+            FirebaseApp.initializeApp(context)
+
+            if (prefs.getBoolean("notif", true)) {
+                FirebaseMessaging.getInstance().subscribeToTopic("substitutions-android")
+            } else {
+                FirebaseMessaging.getInstance().unsubscribeFromTopic("substitutions-android")
+            }
+            FirebaseMessaging.getInstance().subscribeToTopic("substitutions-broadcast")
+
             val appbarlayout = findViewById<AppBarLayout>(R.id.appbarlayout)
             val toolbarTxt = findViewById<TextView>(R.id.toolbarTxt)
             val bottomNav = findViewById<BottomNavigationView>(R.id.bottom_nav)
@@ -209,10 +222,6 @@ class Main : AppCompatActivity(R.layout.app_bar_main) {
                     }
                 }
             }
-
-            if (prefs.getBoolean("notif", true)) {
-                notificationJob()
-            }
         }
     }
 
@@ -240,15 +249,4 @@ class Main : AppCompatActivity(R.layout.app_bar_main) {
         supportFragmentManager.beginTransaction().replace(R.id.fragment_container, fragment).setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN).commit()
         return true
     }
-
-    private fun notificationJob() {
-        val componentName = ComponentName(this, NotificationService::class.java)
-        val info = JobInfo.Builder(42, componentName)
-                .setRequiresCharging(false)
-                .setPersisted(true)
-                .setPeriodic(900000)
-                .build()
-        val scheduler = getSystemService(JOB_SCHEDULER_SERVICE) as JobScheduler
-        scheduler.schedule(info)
-    }
 }

app/src/main/java/com/denizd/substitutionplan/NotificationService.kt

@@ -1,44 +0,0 @@
-package com.denizd.substitutionplan
-
-import android.app.job.JobParameters
-import android.app.job.JobService
-import android.content.Context
-import android.net.ConnectivityManager
-import android.preference.PreferenceManager
-
-class NotificationService : JobService() {
-
-    private var jobCancelled = false
-    private val context = this
-
-    override fun onStartJob(params: JobParameters): Boolean {
-        doBackgroundWork(params)
-        return true
-    }
-
-    override fun onStopJob(params: JobParameters?): Boolean {
-        jobCancelled = true
-        return true
-    }
-
-    private fun doBackgroundWork(params: JobParameters) {
-        val prefs = PreferenceManager.getDefaultSharedPreferences(context)
-        val edit = prefs.edit()
-        val connectivityManager = getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
-        val networkStatus = connectivityManager.activeNetworkInfo
-
-        Thread(Runnable {
-            if (!prefs.getBoolean("notif", false) || jobCancelled || networkStatus == null) {
-                jobFinished(params, false)
-                return@Runnable
-            } else {
-                edit.putInt("notificationTestNumberDev", prefs.getInt("notificationTestNumberDev", 0) + 1).apply()
-                try {
-                    DataFetcher(true, true, true, context, application, null).execute()
-                } catch (ignored: Exception) {}
-
-                jobFinished(params, false)
-            }
-        }).start()
-    }
-}

app/src/main/java/com/denizd/substitutionplan/SettingsFragment.kt

@@ -24,6 +24,7 @@ import androidx.recyclerview.widget.RecyclerView
 import com.google.android.material.bottomnavigation.BottomNavigationView
 import com.google.android.material.button.MaterialButton
 import com.google.android.material.textfield.TextInputEditText
+import com.google.firebase.messaging.FirebaseMessaging
 import com.jaredrummler.android.device.DeviceName
 import kotlin.collections.ArrayList
 
@@ -231,6 +232,11 @@ class SettingsFragment : Fragment(R.layout.content_settings), View.OnClickListen
                 }
                 R.id.switchNotifications -> {
                     edit.putBoolean("notif", isChecked)
+                    if (isChecked) {
+                        FirebaseMessaging.getInstance().subscribeToTopic("substitutions-android")
+                    } else {
+                        FirebaseMessaging.getInstance().unsubscribeFromTopic("substitutions-android")
+                    }
                 }
                 R.id.switchDefaultPlan -> {
                     edit.putBoolean("defaultPersonalised", isChecked)