/**
 * 议题模型。
 */
"use strict";

let RedisClient = require('../../repository/redis/redis.client.js');
let redisClient = RedisClient.redisClient();
let RedisModel = require('./../redis.model.js');
let modelUtil = require('../../util/modelUtil');
let Participants = require("./participants");
let Sessions = require("./sessions");
const RedisKey = require('../../include/commons').RedisKey;


class Topics extends RedisModel {
    constructor() {
        super();
    }

    /**
     * 根据topicId获取对应的Topics
     * @param topicId
     */
    getTopicsById(topicId){

        
    }


    /**
     * 根据用户ID获取用户的Topics列表
     * @param UserId
     */
    getUserTopics(UserId){

    }

    /**
     * 根据topicId获取对应的消息
     * @param topicId
     */
    getTopicMessages(topicId){


    }

    /**
     *
     * @param topicName 发起议题的名称
     * @param patient 发起议题的患者
     * @param doctor 参与的医生
     * @param messages 发送的消息对象{quesion:"",img:""}图片多个用逗号隔开
     */
    createTopics(topicName,patient,healthDoctor,doctor,messages){
        let self = this;
        let participants = new Participants();
        let sessions = new Sessions();
        //从数据库中获取sessionId
        participants.getSessionIdByParticipants(patient,healthDoctor,function(err,res){
            if (err) {
                modelUtil.emitDbError(self.eventEmitter, "Get group member's avatar list failed", err);
                return;
            }
            //如果存在的情况直接返回
            if(res){
                return res;
            }else{
            //不存在则去创建一个session

            }
        })

    }

}

// Expose class
module.exports = Topics;