聊天：获取私聊历史消息

game-server/app/services/chatService.ts

@@ -1,3 +1,4 @@
+import { CounterModel } from './../db/Counter';
 import { STATUS } from './../consts/statusCode';
 import { PrivateMessageModel, PrivateMessageParam, PrivateMessageType } from './../db/PrivateMessage';
 import { GroupMessageParam, GroupMessageType } from '../db/GroupMessage';
@@ -27,13 +28,22 @@ export function groupRoomId(channel: string, channelId: string) {
     return `${channel}_${channelId}`;
 }
 
+function msgCounterName(roomId: string) {
+    return `chat_${roomId}`;
+}
+
 /**
  * @description 设置群消息和私聊消息的公共字段
  * @param {(PrivateMessageParam | GroupMessageParam)} msg
  */
-function setupBaseMsgParm(msg: PrivateMessageParam | GroupMessageParam ) {
+async function setupBaseMsgParm(msg: PrivateMessageParam | GroupMessageParam ) {
     msg.msgCode = genCode(MSG_CODE_LEN);
     msg.status = MSG_STATUS.NORMAL;
+    if (!msg.roomId) {
+        console.error('roomId needed while setup msg parameter');
+        return;
+    }
+    msg.seqId = await CounterModel.getNewCounter({name: msgCounterName(msg.roomId), def: 1});
 }
 
 /**
@@ -46,10 +56,10 @@ function setupBaseMsgParm(msg: PrivateMessageParam | GroupMessageParam ) {
  * @param {string} targetMsgCode
  * @returns
  */
-function createPrivateMsgData(roleId: string, roleName: string, type: number, content: string, targetRoleId: string, targetMsgCode: string) {
+async function createPrivateMsgData(roleId: string, roleName: string, type: number, content: string, targetRoleId: string, targetMsgCode: string) {
     const result: PrivateMessageParam = {roleId, roleName, type, content, targetRoleId, targetMsgCode};
-    setupBaseMsgParm(result);
     result.roomId = privateRoomId(roleId, targetRoleId);
+    await setupBaseMsgParm(result);
     return result;
 }
 
@@ -65,7 +75,7 @@ function createPrivateMsgData(roleId: string, roleName: string, type: number, co
  * @returns
  */
 export async function createPrivateMsg(roleId: string, roleName: string, type: number, content: string, targetRoleId: string, targetMsgCode: string) {
-    const msgData: PrivateMessageParam = createPrivateMsgData(roleId, roleName, type, content, targetRoleId, targetMsgCode);
+    const msgData: PrivateMessageParam = await createPrivateMsgData(roleId, roleName, type, content, targetRoleId, targetMsgCode);
     const result: PrivateMessageType = await PrivateMessageModel.createMsg(msgData);
     return result;
 }
@@ -81,4 +91,18 @@ export async function pushMsgToRole(targetRoleId: string, msg: PrivateMessageTyp
     if (sid) {
         pinus.app.get('channelService').pushMessageByUids(ON_MSG_ROUTE, resResult(STATUS.SUCCESS, msg), [{uid: targetRoleId, sid}]);
     }
+}
+
+/**
+ * @description 获取私聊历史消息
+ * @export
+ * @param {string} roleId
+ * @param {string} targetRoleId
+ * @param {number} fromSeqId
+ * @param {number} count
+ * @returns
+ */
+export async function getPrivateMessages(roleId: string, targetRoleId: string, fromSeqId: number, count: number) {
+    const result = await PrivateMessageModel.getMsgs(privateRoomId(roleId, targetRoleId), fromSeqId, count);
+    return result;
 }