Merge pull request #136 from SEMOSAN/fix/#135-tracking-fcm-ios-background

[Fix] APNs silent push 설정을 추가

Author: pooreumjung

src/main/java/com/semosan/api/common/fcm/FcmService.java

@@ -1,5 +1,7 @@
 package com.semosan.api.common.fcm;
 
+import com.google.firebase.messaging.ApnsConfig;
+import com.google.firebase.messaging.Aps;
 import com.google.firebase.messaging.FirebaseMessaging;
 import com.google.firebase.messaging.FirebaseMessagingException;
 import com.google.firebase.messaging.Message;
@@ -31,6 +33,10 @@ public String sendMessage(
             builder.setNotification(notification);
         }
 
+        if (dataOnly) {
+            builder.setApnsConfig(silentPushApnsConfig());
+        }
+
         if (data != null && !data.isEmpty()) {
             builder.putAllData(data);
         }
@@ -40,4 +46,12 @@ public String sendMessage(
         return response;
     }
 
+    private ApnsConfig silentPushApnsConfig() {
+        return ApnsConfig.builder()
+                .setAps(Aps.builder()
+                        .setContentAvailable(true)
+                        .build())
+                .build();
+    }
+
 }