From 25b8b611abbf99e125515c84925487b2a7abeb89 Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Mon, 15 Oct 2018 15:16:25 +0300
Subject: notifications: switch to FCM HTTP API

---
 .../java/com/juick/components/FirebaseManager.java | 79 ++++++++++++++--------
 1 file changed, 52 insertions(+), 27 deletions(-)

(limited to 'juick-notifications/src/main/java/com/juick')

diff --git a/juick-notifications/src/main/java/com/juick/components/FirebaseManager.java b/juick-notifications/src/main/java/com/juick/components/FirebaseManager.java
index 24bb43d1..a150c010 100644
--- a/juick-notifications/src/main/java/com/juick/components/FirebaseManager.java
+++ b/juick-notifications/src/main/java/com/juick/components/FirebaseManager.java
@@ -1,7 +1,13 @@
 package com.juick.components;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.google.android.gcm.server.*;
+import com.google.auth.oauth2.GoogleCredentials;
+import com.google.firebase.FirebaseApp;
+import com.google.firebase.FirebaseOptions;
+import com.google.firebase.messaging.FirebaseMessaging;
+import com.google.firebase.messaging.FirebaseMessagingException;
+import com.google.firebase.messaging.Message;
 import com.juick.ExternalToken;
 import com.juick.User;
 import com.juick.service.component.*;
@@ -12,7 +18,7 @@ import org.springframework.beans.factory.annotation.Value;
 import javax.annotation.PostConstruct;
 import javax.inject.Inject;
 import java.io.IOException;
-import java.util.Arrays;
+import java.io.InputStream;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -22,14 +28,22 @@ public class FirebaseManager implements NotificationListener {
     ObjectMapper jsonMapper;
     @Value("${gcm_key:}")
     private String gcmKey;
+    @Value("${fcm_database_url:}")
+    private String fcmDatabaseUrl;
     @Inject
     private NotificationsManager notificationsManager;
 
-    private Sender GCMSender;
-
     @PostConstruct
-    public void initialize() {
-        GCMSender = new Sender(gcmKey, Endpoint.GCM);
+    public void initialize() throws IOException {
+        InputStream serviceAccount =
+                ClassLoader.class.getResourceAsStream("serviceAccount.json");
+
+        FirebaseOptions options = new FirebaseOptions.Builder()
+                .setCredentials(GoogleCredentials.fromStream(serviceAccount))
+                .setDatabaseUrl(fcmDatabaseUrl)
+                .build();
+
+        FirebaseApp.initializeApp(options);
     }
 
     @Override
@@ -40,29 +54,40 @@ public class FirebaseManager implements NotificationListener {
         List<String> regids = users.stream().flatMap(u -> u.getTokens().stream()).filter(d -> d.getType().equals("gcm"))
                 .map(ExternalToken::getToken).collect(Collectors.toList());
         if (!regids.isEmpty()) {
+            String json = null;
             try {
-                String json = jsonMapper.writeValueAsString(jmsg);
-                logger.info(json);
-                Message message = new Message.Builder().addData("message", json).build();
-                MulticastResult result = GCMSender.send(message, regids, 3);
-                List<Result> results = result.getResults();
-                for (int i = 0; i < results.size(); i++) {
-                    Result currentResult = results.get(i);
-                    logger.info("RES {}: {}", i, currentResult);
-                    List<String> errorCodes = Arrays.asList(Constants.ERROR_MISMATCH_SENDER_ID, Constants.ERROR_NOT_REGISTERED);
-                    if (errorCodes.contains(currentResult.getErrorCodeName())) {
-                        // assuming results are in order of regids
-                        // http://stackoverflow.com/a/11594531/1097384
-                        String currentId = regids.get(i);
-                        logger.info("{} is scheduled to remove", currentId);
-                        notificationsManager.addInvalidGCMToken(currentId);
-                    }
-                }
-            } catch (IOException ex) {
-                logger.error(ex.getMessage(), ex);
-            } catch (IllegalArgumentException err) {
-                logger.warn("Android: Invalid API Key", err);
+                json = jsonMapper.writeValueAsString(jmsg);
+            } catch (JsonProcessingException e) {
+                logger.warn("JSON exception", e);
             }
+            logger.info(json);
+            Message.Builder messageBuilder = Message.builder()
+                    .putData("message", json);
+            regids.forEach(token -> {
+                messageBuilder.setToken(token);
+                try {
+                    String response = FirebaseMessaging.getInstance().send(messageBuilder.build());
+                    // Response is a message ID string.
+                    logger.info("Successfully sent message: " + response);
+                } catch (FirebaseMessagingException e) {
+                    logger.warn("Firebase exception", e);
+                        /*
+                        List<Result> results = result.getResults();
+                        for (int i = 0; i < results.size(); i++) {
+                            Result currentResult = results.get(i);
+                            logger.info("RES {}: {}", i, currentResult);
+                            List<String> errorCodes = Arrays.asList(Constants.ERROR_MISMATCH_SENDER_ID, Constants.ERROR_NOT_REGISTERED);
+                            if (errorCodes.contains(currentResult.getErrorCodeName())) {
+                                // assuming results are in order of regids
+                                // http://stackoverflow.com/a/11594531/1097384
+                                String currentId = regids.get(i);
+                                logger.info("{} is scheduled to remove", currentId);
+                                notificationsManager.addInvalidGCMToken(currentId);
+                            }
+                        }*/
+                }
+
+            });
         } else {
             logger.info("GMS: no recipients");
         }
-- 
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