Show notification when order status change

Foodify/app/src/main/java/com/waterbase/foodify/Common/Common.java

@@ -4,4 +4,13 @@ import com.waterbase.foodify.Model.User;
 
 public class Common {
     public static User currentUser;
+
+    public static String convertCodeToStatus(String status) {
+        if(status.equals("0"))
+            return "Placed";
+        else if(status.equals("1"))
+            return "On my way";
+        else
+            return "Shipped";
+    }
 }

Foodify/app/src/main/java/com/waterbase/foodify/Home.java

@@ -25,6 +25,7 @@ import com.squareup.picasso.Picasso;
 import com.waterbase.foodify.Common.Common;
 import com.waterbase.foodify.Interface.ItemClickListener;
 import com.waterbase.foodify.Model.Category;
+import com.waterbase.foodify.Service.ListenOrder;
 import com.waterbase.foodify.ViewHolder.MenuViewHolder;
 
 
@@ -73,6 +74,10 @@ public class Home extends AppCompatActivity implements NavigationView.OnNavigati
         View headerView = navigationView.getHeaderView(0);
         TextView navUserName = (TextView) headerView.findViewById(R.id.txtFullName);
         navUserName.setText(Common.currentUser.getName());
+
+        //Register Service
+        Intent service = new Intent(Home.this, ListenOrder.class);
+        startService(service);
     }
 
     private void loadMenu() {

Foodify/app/src/main/java/com/waterbase/foodify/OrderStatus.java

@@ -39,6 +39,11 @@ public class OrderStatus extends AppCompatActivity {
         recyclerView.setHasFixedSize(true);
         layoutManager = new LinearLayoutManager(this);
         recyclerView.setLayoutManager(layoutManager);
+
+        if(getIntent() == null)
+            loadOrders(Common.currentUser.getPhone());
+        else
+            loadOrders(getIntent().getStringExtra("userPhone"));
         
         loadOrders(Common.currentUser.getPhone());
 
@@ -61,7 +66,7 @@ public class OrderStatus extends AppCompatActivity {
             @Override
             protected void populateViewHolder(OrderViewHolder orderViewHolder, Request model, int i) {
                 orderViewHolder.txtOrderId.setText(adapter.getRef(i).getKey());
-                orderViewHolder.txtOrderStatus.setText(converCodeToStatus(model.getStatus()));
+                orderViewHolder.txtOrderStatus.setText(Common.convertCodeToStatus(model.getStatus()));
                 orderViewHolder.txtOrderAddress.setText(model.getAddress());
                 orderViewHolder.txtOrderPhone.setText(model.getPhone());
             }
@@ -69,15 +74,6 @@ public class OrderStatus extends AppCompatActivity {
         recyclerView.setAdapter(adapter);
     }
 
-    private String converCodeToStatus(String status) {
-        if(status.equals("0"))
-            return "Placed";
-        else if(status.equals("1"))
-            return "On my way";
-        else
-            return "Shipped";
-    }
-
     @Override
     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
         switch (item.getItemId()) {

Foodify/app/src/main/java/com/waterbase/foodify/Service/ListenOrder.java

@@ -0,0 +1,105 @@
+package com.waterbase.foodify.Service;
+
+import android.app.Notification;
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Build;
+import android.os.IBinder;
+
+import androidx.core.app.NotificationCompat;
+
+import com.google.firebase.database.ChildEventListener;
+import com.google.firebase.database.DataSnapshot;
+import com.google.firebase.database.DatabaseError;
+import com.google.firebase.database.DatabaseReference;
+import com.google.firebase.database.FirebaseDatabase;
+import com.waterbase.foodify.Common.Common;
+import com.waterbase.foodify.Model.Request;
+import com.waterbase.foodify.OrderStatus;
+import com.waterbase.foodify.R;
+
+public class ListenOrder extends Service implements ChildEventListener {
+
+    FirebaseDatabase db;
+    DatabaseReference requests;
+
+    public ListenOrder() {
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        db = FirebaseDatabase.getInstance();
+        requests = db.getReference("Requests");
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        requests.addChildEventListener(this);
+        return super.onStartCommand(intent, flags, startId);
+    }
+
+    @Override
+    public void onChildAdded(DataSnapshot dataSnapshot, String s) {
+        
+    }
+
+    @Override
+    public void onChildChanged(DataSnapshot dataSnapshot, String s) {
+        Request request = dataSnapshot.getValue(Request.class);
+        showNotification(dataSnapshot.getKey(), request);
+    }
+
+    private void showNotification(String key, Request request) {
+        Intent intent=new Intent(getBaseContext(), OrderStatus.class);
+        intent.putExtra("userPhone",request.getPhone()); //we need put user phone
+        PendingIntent contentIntent=PendingIntent
+                .getActivity(getBaseContext(),0,intent,PendingIntent.FLAG_UPDATE_CURRENT);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
+            NotificationChannel channel=
+                    new NotificationChannel("foodStatus","foodStatus",NotificationManager.IMPORTANCE_DEFAULT);
+            NotificationManager notificationManager=getSystemService(NotificationManager.class);
+            notificationManager.createNotificationChannel(channel);
+
+        }
+
+        NotificationCompat.Builder builder=new NotificationCompat.Builder(getBaseContext(),"foodStatus");
+        builder.setAutoCancel(true)
+                .setDefaults(Notification.DEFAULT_ALL)
+                .setWhen(System.currentTimeMillis())
+                .setTicker("food")
+                .setContentInfo("your order was updated")
+                .setContentText("Order #"+key+" was updated to "+ Common.convertCodeToStatus(request.getStatus()))
+                .setContentIntent(contentIntent)
+                .setContentInfo("Info")
+                .setSmallIcon(R.mipmap.ic_launcher);
+
+        NotificationManager notificationManager=(NotificationManager)getBaseContext().getSystemService(Context.NOTIFICATION_SERVICE);
+        notificationManager.notify(1,builder.build());
+    }
+
+    @Override
+    public void onChildRemoved(DataSnapshot dataSnapshot) {
+
+    }
+
+    @Override
+    public void onChildMoved(DataSnapshot dataSnapshot, String s) {
+
+    }
+
+    @Override
+    public void onCancelled(DatabaseError databaseError) {
+
+    }
+}