聊天：置顶和删除记录

shared/db/ChatInfo.ts

@@ -10,6 +10,10 @@ export class PrivateChatRec {
   lastChatTime: Date; // 最后聊天时间
   @prop({ required: true, default: 0 })
   unreadCnt: number; // 未读消息数
+  @prop({ required: true })
+  isTop: boolean; // 是否置顶
+  @prop({ required: true })
+  setTopTime: Date; // 置顶时间
 }
 
 /**
@@ -61,6 +65,26 @@ export default class ChatInfo extends BaseModel {
       .select('-_id').lean();
     return result;
   }
+
+  public static async setTop(roleId: string, targetRoleId: string, isTop: boolean, time: Date) {
+    const result: ChatInfoType = await ChatInfoModel
+      .findOneAndUpdate(
+        { roleId, 'recentPrivateChats.targetRoleId': targetRoleId },
+        { 'recentPrivateChats.$.isTop': isTop, 'recentPrivateChats.$.setTopTime': time },
+        { new: true })
+      .select('-_id').lean();
+    return result;
+  }
+
+  public static async delMsg(roleId: string, targetRoleId: string) {
+    const result: ChatInfoType = await ChatInfoModel
+      .findOneAndUpdate(
+        { roleId },
+        { $pull: { recentPrivateChats: { targetRoleId } } },
+        { new: true })
+      .select('-_id').lean();
+    return result;
+  }
 }
 
 export const ChatInfoModel = getModelForClass(ChatInfo);