寻宝：抽象队长匹配队友的逻辑；抽象 channel 中的用户

game-server/app/services/roleService.ts

@@ -1,3 +1,5 @@
+import { ChannelUser } from './../domain/ChannelUser';
+import { Channel } from 'pinus';
 import { getRandNum, getRandomArr } from '../pubUtils/util';
 import { TERAPH_RANDOM } from "../consts/consts";
 import { indexOf } from 'underscore';
@@ -57,4 +59,12 @@ export function checkMaterialEnough(count: number, attrs:Array<any>, teraphInfo:
         consumes.push({ id, count: count*times});
     }
     return {attr: res, consumes};
+}
+
+export function addUserToChannel(channel: Channel, user: ChannelUser) {
+    const users = channel.getMembers();
+    const { uid, sid } = user;
+    if (users.indexOf(uid) === -1) {
+        channel.add(uid, sid);
+    }
 }