[♻️ refactor/#72] FCM 데이터 페이로드 형식 수정

src/main/java/org/terning/fcm/application/FcmPushSenderImpl.java

@@ -21,14 +21,12 @@ public boolean send(Notification notification) {
             User user = notification.getUser();
             String token = user.getToken().value();
 
-            ViewType viewType = ViewType.fromTemplate(notification.getMessage().getMessageTemplateType());
-
             Message fcmMessage = Message.builder()
                     .setToken(token)
-                    .putData("token", token)
                     .putData("type", notification.getMessage().getViewType())
                     .putData("title", notification.getMessage().getMain())
                     .putData("body", notification.getMessage().getSub())
+                    .putData("imageUrl", notification.getMessage().getImageUrl())
                     .build();
 
             String response = FirebaseMessaging.getInstance().send(fcmMessage);

src/main/java/org/terning/message/domain/Message.java

@@ -26,15 +26,20 @@ public class Message extends BaseEntity {
 
     private String viewType;
 
-    private Message(MessageTemplateType messageTemplateType, String main, String sub, String viewType) {
+    private String imageUrl;
+
+    private Message(MessageTemplateType messageTemplateType, String main, String sub,
+                    String viewType, String imageUrl) {
         this.messageTemplateType = messageTemplateType;
         this.main = main;
         this.sub = sub;
         this.viewType = viewType;
+        this.imageUrl = imageUrl;
     }
 
-    public static Message of(MessageTemplateType messageTemplateType, String main, String sub) {
-        return new Message(messageTemplateType, main, sub, ViewType.fromTemplate(messageTemplateType).name());
+    public static Message of(MessageTemplateType messageTemplateType, String main, String sub, String imageUrl) {
+        return new Message(messageTemplateType, main, sub,
+                ViewType.fromTemplate(messageTemplateType).name(), imageUrl);
     }
 
     public boolean isSameType(MessageTemplateType other) {

src/main/java/org/terning/message/domain/enums/MessageTemplateType.java

@@ -42,6 +42,17 @@ public static MessageTemplateType from(String template) {
                 .orElseThrow(() -> new NotificationException(NotificationErrorCode.INVALID_TEMPLATE_TYPE));
     }
 
+    public String getImageUrl() {
+        return switch (this) {
+            case INTERESTED_ANNOUNCEMENT_REMINDER ->
+                    "https://your-cdn.com/images/interested_announcement.png";
+            case RECENTLY_POSTED_INTERNSHIP_RECOMMENDATION ->
+                    "https://your-cdn.com/images/recently_posted_internship.png";
+            case TRENDING_INTERNSHIP_ALERT ->
+                    "https://your-cdn.com/images/trending_internship.png";
+        };
+    }
+
     public String main(Map<String, String> params) {
         return mainMessage.format(params);
     }

src/main/java/org/terning/notification/application/writer/NotificationWriterImpl.java

@@ -69,7 +69,8 @@ private Message createMessage(MessageTemplateType template, Map<String, String>
         return Message.of(
                 template,
                 template.main(context),
-                template.sub(context)
+                template.sub(context),
+                template.getImageUrl()
         );
     }