1 files changed, 88 insertions, 0 deletions
diff --git a/src/main/java/com/juick/server/api/SystemActivity.java b/src/main/java/com/juick/server/api/SystemActivity.java
new file mode 100644
index 00000000..162374d1
--- /dev/null
+++ b/src/main/java/com/juick/server/api/SystemActivity.java
@@ -0,0 +1,88 @@
+package com.juick.server.api;
+
+import com.juick.Message;
+import com.juick.User;
+
+import java.util.List;
+
+public class SystemActivity {
+    public static SystemActivity like(User from, Message message, List<User> subscribers) {
+        var like = new SystemActivity();
+        like.setType(ActivityType.like);
+        like.setFrom(from);
+        like.setMessage(message);
+        like.setTo(subscribers);
+        return like;
+    }
+
+    public static SystemActivity message(User from, Message message, List<User> subscribers) {
+        var msg = new SystemActivity();
+        msg.setType(ActivityType.message);
+        msg.setFrom(from);
+        msg.setMessage(message);
+        msg.setTo(subscribers);
+        return msg;
+    }
+
+    public static SystemActivity read(User from, Message message) {
+        var read = new SystemActivity();
+        read.setType(ActivityType.message);
+        read.setFrom(from);
+        var msg = new Message();
+        msg.setMid(message.getMid());
+        msg.setService(true);
+        msg.setUnread(false);
+        read.setMessage(msg);
+        return read;
+    }
+
+    public static SystemActivity follow(User from, List<User> to) {
+        var follow = new SystemActivity();
+        follow.setFrom(from);
+        follow.setTo(to);
+        return follow;
+    }
+
+    public enum ActivityType {
+        message,
+        like,
+        follow
+    }
+
+    private ActivityType type;
+    private User from;
+    private List<User> to;
+    private Message message;
+
+    public ActivityType getType() {
+        return type;
+    }
+
+    public void setType(ActivityType type) {
+        this.type = type;
+    }
+
+    public User getFrom() {
+        return from;
+    }
+
+    public void setFrom(User from) {
+        this.from = from;
+    }
+
+    public List<User> getTo() {
+        return to;
+    }
+
+    public void setTo(List<User> to) {
+        this.to = to;
+    }
+
+    public Message getMessage() {
+        return message;
+    }
+
+    public void setMessage(Message message) {
+        this.message = message;
+    }
+}