<?php
namespace app\chat\model;


use support\Redis;
use support\think\Db;

class ChatMessage extends BaseModel
{
    public $tabla_name = 'chat_message';

    public static function getconverlist($uid, $user_type)
    {
        // 获取所有会话ID
        $sessionIds = Db::name('chat_message')->where('from_id', $uid)->WhereOr('to_id', $uid)
            ->group('session_id')->column('session_id');
        $data = [];
        $i = 0;
        foreach ($sessionIds as $k => $session_id) {
            // 未读计数
            $unreadCount = Db::name('chat_unread_count')->where(['user_id' => $uid, 'session_id' => $session_id])->value('count')?:0;
            $data[$i]['unread_count'] = $unreadCount;
            // 最后一条消息
            $lastMsg = Db::name('chat_message')
                ->where('session_id', $session_id)
                ->order('send_time', 'desc')
                ->find();
            if($lastMsg) {
                $chat_user = Db::name('chat_user')->where(['user_id' => $lastMsg['from_id']])->field('nick_name,avatar')->find();
                // 如果是自己发的不显示发送人
                if($lastMsg['from_id'] == $uid) {
                    $data[$i]['msg'] = $lastMsg['content'];
                }else {
                    // 如果是别人发的显示昵称
                    $data[$i]['msg'] = $chat_user['nick_name'] . '：' . $lastMsg['content'];
                }
                $data[$i]['avatar'] = $chat_user['avatar'];
                $data[$i]['chat_type'] = $lastMsg['chat_type'];
            }else {
                $data[$i][] = '';
            }
            $data[$i]['send_time'] = formatWeChatTime($lastMsg['send_time']);
            $data[$i]['session_id'] = $session_id;
            $i ++;
        }
        if(Redis::set('usermsg:list:' . $user_type . ':' . $uid, json_encode($data))) {
            return $data;
        }
    }


}