register device on server with key and fcm token

app/build.gradle

@@ -43,4 +43,6 @@ dependencies {
     implementation 'com.google.firebase:firebase-messaging-directboot'
 
     implementation 'com.google.code.gson:gson:2.9.0'
+    implementation 'com.squareup.retrofit2:retrofit:2.9.0'
+    implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
 }

app/src/main/java/com/vernu/sms/GatewayApiService.java

@@ -0,0 +1,14 @@
+package com.vernu.sms;
+
+import com.vernu.sms.dtos.UpdateFCMTokenInputDTO;
+import com.vernu.sms.dtos.UpdateFCMTokenResponseDTO;
+
+import retrofit2.Call;
+import retrofit2.http.Body;
+import retrofit2.http.POST;
+import retrofit2.http.Path;
+
+public interface GatewayApiService {
+    @POST("gateway/devices/{deviceId}/updateFCMToken")
+    Call<UpdateFCMTokenResponseDTO> updateFCMToken(@Path("deviceId") String deviceId, @Body() UpdateFCMTokenInputDTO body);
+}

app/src/main/java/com/vernu/sms/activities/MainActivity.java

@@ -9,6 +9,7 @@ import android.Manifest;
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.View;
 import android.widget.Button;
 import android.widget.EditText;
@@ -19,9 +20,18 @@ import com.google.android.gms.tasks.OnCompleteListener;
 import com.google.android.gms.tasks.Task;
 import com.google.android.material.snackbar.Snackbar;
 import com.google.firebase.messaging.FirebaseMessaging;
+import com.vernu.sms.GatewayApiService;
 import com.vernu.sms.R;
+import com.vernu.sms.dtos.UpdateFCMTokenInputDTO;
+import com.vernu.sms.dtos.UpdateFCMTokenResponseDTO;
 import com.vernu.sms.helpers.SharedPreferenceHelper;
 
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+import retrofit2.Retrofit;
+import retrofit2.converter.gson.GsonConverterFactory;
+
 public class MainActivity extends AppCompatActivity {
 
     private Context mContext;
@@ -63,20 +73,49 @@ public class MainActivity extends AppCompatActivity {
             @Override
             public void onClick(View view) {
                 String newKey = gatewayKeyEditText.getText().toString();
-                SharedPreferenceHelper.setSharedPreferenceString(mContext, "GATEWAY_KEY", newKey);
 
                 FirebaseMessaging.getInstance().getToken()
                         .addOnCompleteListener(new OnCompleteListener<String>() {
                             @Override
                             public void onComplete(@NonNull Task<String> task) {
                                 if (!task.isSuccessful()) {
+                                    Snackbar.make(view, "Failed to obtain FCM Token :(", Snackbar.LENGTH_LONG).show();
                                     return;
                                 }
                                 String token = task.getResult();
-                                Toast.makeText(MainActivity.this, token, Toast.LENGTH_SHORT).show();
                                 fcmTokenEditText.setText(token);
+                                Retrofit retrofit = new Retrofit.Builder()
+                                        .baseUrl("https://vernu-sms.herokuapp.com/api/v1/")
+                                        .addConverterFactory(GsonConverterFactory.create())
+                                        .build();
+
+                                GatewayApiService service = retrofit.create(GatewayApiService.class);
+                                Call<UpdateFCMTokenResponseDTO> apiCall = service.updateFCMToken(newKey, new UpdateFCMTokenInputDTO(token));
+                                apiCall.enqueue(new Callback<UpdateFCMTokenResponseDTO>() {
+                                    @Override
+                                    public void onResponse(Call<UpdateFCMTokenResponseDTO> call, Response<UpdateFCMTokenResponseDTO> response) {
+
+                                        if (response.isSuccessful()) {
+                                            SharedPreferenceHelper.setSharedPreferenceString(mContext, "GATEWAY_KEY", newKey);
+                                            Log.e("API_RESP", response.toString());
+                                            Snackbar.make(view, "DONE :)", Snackbar.LENGTH_LONG).show();
+
+                                        } else {
+                                            Snackbar.make(view, response.message(), Snackbar.LENGTH_LONG).show();
+
+                                        }
+                                    }
+
+                                    @Override
+                                    public void onFailure(Call<UpdateFCMTokenResponseDTO> call, Throwable t) {
+                                        Snackbar.make(view, "An error occured :(", Snackbar.LENGTH_LONG).show();
+
+                                    }
+                                });
                             }
                         });
+
+
             }
         });
 

app/src/main/java/com/vernu/sms/dtos/UpdateFCMTokenInputDTO.java

@@ -0,0 +1,9 @@
+package com.vernu.sms.dtos;
+
+public class UpdateFCMTokenInputDTO {
+    public String fcmToken;
+
+    public UpdateFCMTokenInputDTO(String fcmToken) {
+        this.fcmToken = fcmToken;
+    }
+}

app/src/main/java/com/vernu/sms/dtos/UpdateFCMTokenResponseDTO.java

@@ -0,0 +1,7 @@
+package com.vernu.sms.dtos;
+
+public class UpdateFCMTokenResponseDTO {
+    public boolean success;
+    public Object data;
+    public String error;
+}

app/src/main/java/com/vernu/sms/helpers/SharedPreferenceHelper.java

@@ -7,40 +7,40 @@ public class SharedPreferenceHelper {
     private final static String PREF_FILE = "PREF";
 
 
-    public static void setSharedPreferenceString(Context context, String key, String value){
+    public static void setSharedPreferenceString(Context context, String key, String value) {
         SharedPreferences settings = context.getSharedPreferences(PREF_FILE, 0);
         SharedPreferences.Editor editor = settings.edit();
         editor.putString(key, value);
         editor.apply();
     }
 
-    public static void setSharedPreferenceInt(Context context, String key, int value){
+    public static void setSharedPreferenceInt(Context context, String key, int value) {
         SharedPreferences settings = context.getSharedPreferences(PREF_FILE, 0);
         SharedPreferences.Editor editor = settings.edit();
         editor.putInt(key, value);
         editor.apply();
     }
 
-    public static void setSharedPreferenceBoolean(Context context, String key, boolean value){
+    public static void setSharedPreferenceBoolean(Context context, String key, boolean value) {
         SharedPreferences settings = context.getSharedPreferences(PREF_FILE, 0);
         SharedPreferences.Editor editor = settings.edit();
         editor.putBoolean(key, value);
         editor.apply();
     }
 
-    public static String getSharedPreferenceString(Context context, String key, String defValue){
+    public static String getSharedPreferenceString(Context context, String key, String defValue) {
         SharedPreferences settings = context.getSharedPreferences(PREF_FILE, 0);
         return settings.getString(key, defValue);
     }
 
 
-    static int getSharedPreferenceInt(Context context, String key, int defValue){
+    static int getSharedPreferenceInt(Context context, String key, int defValue) {
         SharedPreferences settings = context.getSharedPreferences(PREF_FILE, 0);
         return settings.getInt(key, defValue);
     }
 
 
-    static boolean getSharedPreferenceBoolean(Context context, String key, boolean defValue){
+    static boolean getSharedPreferenceBoolean(Context context, String key, boolean defValue) {
         SharedPreferences settings = context.getSharedPreferences(PREF_FILE, 0);
         return settings.getBoolean(key, defValue);
     }

app/src/main/res/layout/activity_main.xml

@@ -51,6 +51,8 @@
         android:ems="10"
         android:gravity="start|top"
         android:inputType="textMultiLine"
+        android:enabled="false"
+        android:hint="FCM Token"
         app:layout_constraintEnd_toEndOf="@+id/gatewayKeyEditText"
         app:layout_constraintStart_toStartOf="@+id/gatewayKeyEditText"
         app:layout_constraintTop_toBottomOf="@+id/gatewayKeyEditText" />