feat(wip): 實現 ChatPrivate

server/data/ChatPrivate.ts

@@ -0,0 +1,26 @@
+import Chat from "./Chat.ts"
+import User from "./User.ts";
+
+export default class ChatPrivate extends Chat {
+    static getChatIdByUsersId(userIdA: string, userIdB: string) {
+        return [userIdA, userIdB].sort().join('-')
+    }
+
+    static createForPrivate(userA: User, userB: User) {
+        return this.create(this.getChatIdByUsersId(userA.bean.id, userB.bean.id), 'private')
+    }
+    static findForPrivate() {
+
+    }
+
+    getTitleForPrivate(user: User, targetUser: User) {
+        const chat = Chat.findById(ChatPrivate.getChatIdByUsersId(user.bean.id, targetUser.bean.id))
+
+        if (chat?.bean.user_a_id == user.bean.id)
+            return targetUser.getNickName()
+        if (chat?.bean.user_b_id == user.bean.id)
+            return user.getNickName()
+
+        return "未知對話"
+    }
+}