From 2f2e9aab6194037259625200091949d8648e3409 Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Tue, 24 Sep 2019 11:54:21 +0300
Subject: Use single event model for all application events

---
 src/main/java/com/juick/server/ServerManager.java | 71 ++++++++++-------------
 1 file changed, 31 insertions(+), 40 deletions(-)

(limited to 'src/main/java/com/juick/server/ServerManager.java')

diff --git a/src/main/java/com/juick/server/ServerManager.java b/src/main/java/com/juick/server/ServerManager.java
index 5b859125..ca69f7d8 100644
--- a/src/main/java/com/juick/server/ServerManager.java
+++ b/src/main/java/com/juick/server/ServerManager.java
@@ -21,6 +21,7 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 import com.juick.Message;
 import com.juick.User;
 import com.juick.model.AnonymousUser;
+import com.juick.server.api.SystemActivity;
 import com.juick.service.MessagesService;
 import com.juick.service.SubscriptionService;
 import com.juick.service.UserService;
@@ -34,6 +35,7 @@ import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Component;
 import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
 
+import javax.annotation.Nonnull;
 import javax.annotation.PostConstruct;
 import javax.inject.Inject;
 import java.util.ArrayList;
@@ -91,10 +93,30 @@ public class ServerManager implements NotificationListener {
     }
 
     @Override
-    public void processMessageEvent(MessageEvent event) {
-        com.juick.Message jmsg = event.getMessage();
-        List<User> subscribedUsers = ListUtils.union(event.getUsers(), Collections.singletonList(jmsg.getUser()));
+    public void processSystemEvent(@Nonnull SystemEvent systemEvent) {
+        var activity = systemEvent.getActivity();
+        var from = activity.getFrom();
+        var message = activity.getMessage();
+        var subscribers = activity.getTo();
+        if (activity.getType().equals(SystemActivity.ActivityType.message)) {
+            processMessage(from, message, subscribers);
+        } else if (activity.getType().equals(SystemActivity.ActivityType.like)) {
+            if (from.equals(serviceUser)) {
+                processTop(message);
+            }
+        }
+        try {
+            var eventHeader = Collections.singletonMap("X-Event-Version", "1.0");
+            emailManager.sendEmail("noreply@juick.com", serviceEmail, "New system event",
+                    jsonMapper.writeValueAsString(systemEvent), null, eventHeader);
+        } catch (JsonProcessingException e) {
+            logger.warn("JSON exception", e);
+        }
+    }
+    private void processMessage(User from, com.juick.Message jmsg, List<User> subscribers) {
+        List<User> subscribedUsers = ListUtils.union(subscribers, Collections.singletonList(jmsg.getUser()));
         if (jmsg.isService()) {
+            logger.info("Message read event from {} for {}", from.getUid(), jmsg.getMid());
             readEvent(jmsg, Collections.singletonList(serviceUser));
             return;
         }
@@ -111,21 +133,6 @@ public class ServerManager implements NotificationListener {
             onJuickMessageReply(jmsg, subscribedUsers);
         }
         messageEvent(jmsg, Collections.singletonList(serviceUser));
-        try {
-            emailManager.sendEmail("noreply@juick.com", serviceEmail, "New message", jsonMapper.writeValueAsString(jmsg), null, Collections.emptyMap());
-        } catch (JsonProcessingException e) {
-            logger.warn("JSON exception", e);
-        }
-    }
-
-    @Override
-    public void processSubscribeEvent(SubscribeEvent subscribeEvent) {
-
-    }
-
-    @Override
-    public void processLikeEvent(LikeEvent likeEvent) {
-
     }
 
     @Override
@@ -133,35 +140,19 @@ public class ServerManager implements NotificationListener {
 
     }
 
-    @Override
-    public void processMessageReadEvent(MessageReadEvent messageReadEvent) {
-        User user = messageReadEvent.getUser();
-        Message source = messageReadEvent.getMessage();
-
-        logger.info("Message read event from {} for {}", user.getUid(), source.getMid());
-        Message serviceMessage = new Message();
-        serviceMessage.setService(true);
-        serviceMessage.setUser(user);
-        serviceMessage.setMid(source.getMid());
-        serviceMessage.setUnread(false);
-        readEvent(serviceMessage, Arrays.asList(serviceUser, user));
-    }
-
-    @Override
-    public void processTopEvent(TopEvent topEvent) {
-        User topUser = topEvent.getMessage().getUser();
-        topEvent(topEvent.getMessage(), Arrays.asList(topUser, serviceUser));
+    private void processTop(Message msg) {
+        User topUser = msg.getUser();
+        topEvent(msg, Arrays.asList(topUser, serviceUser));
     }
-
-    public void topEvent(Message msg, List<User> subscribers){
+    private void topEvent(Message msg, List<User> subscribers){
         sendSseEvent(msg, "top", subscribers);
     }
 
-    public void readEvent(Message msg, List<User> subscribers){
+    private void readEvent(Message msg, List<User> subscribers){
         sendSseEvent(msg, "read", subscribers);
     }
 
-    public void messageEvent(Message msg, List<User> subscribers) {
+    private void messageEvent(Message msg, List<User> subscribers) {
         sendSseEvent(msg, "msg", subscribers);
     }
 
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