dreamland/app/community/lib/Chat.php

<?php

namespace Community\Lib;

use Dever;

class Chat
{
	# 生成key
	private function getKey($uid, $to_uid)
	{
		if ($uid > $to_uid) {
			return $uid . '_' . $to_uid;
		} else {
			return $to_uid . '_' . $uid;
		}
	}

	# 加入聊天信息
	public function add($uid, $to_uid, $collection_id, $text, $pic, $day = false)
	{
		$data['uid'] = $uid;
		$data['to_uid'] = $to_uid;
		$data['collection_id'] = $collection_id;
		$user = Dever::db('community/chat_user')->one($data);
		$data['key'] = $this->getKey($uid, $to_uid);
		if (!$user) {
			Dever::db('community/chat_user')->insert($data);
		}

		$data['text'] = $text;
		$data['pic'] = $pic;
		if ($day) {
			$data['day'] = $day;
		}
		return Dever::db('community/chat_info')->insert($data);
	}

	# 获取聊天对象
	public function getUser($uid, $collection_id, $times = false)
	{
		$data['to_uid'] = $uid;
		$data['collection_id'] = $collection_id;
		$user = Dever::db('community/chat_user')->getAll($data);

		# 获取最新的一条聊天记录
		if ($user) {
			$time = time();
			foreach ($user as $k => $v) {
				$where['uid'] = $v['uid'];
				$where['collection_id'] = $collection_id;
				$chat = Dever::db('community/chat_info')->getNew($where);
				$user[$k]['user'] = Dever::load('collection/lib/user')->get($v['uid'], $collection_id);

				if ($chat) {
					if ($chat['pic'] && !$chat['text']) {
						$chat['text'] = '[图片]';
					} else {
						$chat['text'] = strip_tags($chat['text']);
					}

					$date = Dever::load('collection/lib/times')->getDate($chat['day'], $chat['cdate'], $times, true);

					$chat['day'] = $date[0];
					$chat['date'] = $date[1];
				}

				$user[$k]['chat'] = $chat;
			}
		}

		return $user;
	}

	# 获取聊天记录
	public function getInfo($uid, $to_uid, $collection_id, $times = false)
	{
		$where['key'] = $this->getKey($uid, $to_uid);
		$where['collection_id'] = $collection_id;
		$data['chat'] = Dever::db('community/chat_info')->getAll($where);

		if ($data['chat']) {
			$data['user'][$uid] = Dever::load('collection/lib/user')->get($uid, $collection_id);
			$data['user'][$to_uid] = Dever::load('collection/lib/user')->get($to_uid, $collection_id);
			$data['title'] = $data['user'][$to_uid]['username'];
			foreach ($data['chat'] as $k => $v) {
				$data['chat'][$k]['date'] = Dever::load('collection/lib/times')->getDate($v['day'], $v['cdate'], $times);
				$data['chat'][$k]['self'] = false;
				if ($uid == $v['uid']) {
					$data['chat'][$k]['self'] = true;
				}
			}

			$data['chat'] = array_reverse($data['chat']);
		}

		return $data;
	}
}