friend.php

PPExam 是一个通用的在线考试系统

<?php

/*
	[UCenter] (C)2001-2008 Comsenz Inc.
	This is NOT a freeware, use is subject to license terms

	$Id: friend.php 12126 2008-01-11 09:40:32Z heyond $
*/

!defined('IN_UC') && exit('Access Denied');

class friendmodel {

	var $db;
	var $base;

	function friendmodel(&$base) {
		$this->base = $base;
		$this->db = $base->db;
	}

	function add($uid, $friendid, $comment='') {
		$direction = $this->db->result_first("SELECT direction FROM ".UC_DBTABLEPRE."friends WHERE uid='$friendid' AND friendid='$uid' LIMIT 1");
		if($direction == 1) {
			$this->db->query("INSERT INTO ".UC_DBTABLEPRE."friends SET uid='$uid', friendid='$friendid', comment='$comment', direction='3'", 'SILENT');
			$this->db->query("UPDATE ".UC_DBTABLEPRE."friends SET direction='3' WHERE uid='$friendid' AND friendid='$uid'");
			return 1;
		} elseif($direction == 2) {
			return 1;
		} elseif($direction == 3) {
			return -1;
		} else {
			$this->db->query("INSERT INTO ".UC_DBTABLEPRE."friends SET uid='$uid', friendid='$friendid', comment='$comment', direction='1'", 'SILENT');
			return $this->db->insert_id();
		}
	}

	function delete($uid, $friendids) {
		$friendids = $this->base->implode($friendids);
		$this->db->query("DELETE FROM ".UC_DBTABLEPRE."friends WHERE uid='$uid' AND friendid IN ($friendids)");
		$affectedrows = $this->db->affected_rows();
		if($affectedrows > 0) {
			$this->db->query("UPDATE ".UC_DBTABLEPRE."friends SET direction=1 WHERE uid IN ($friendids) AND friendid='$uid' AND direction='3'");
		}
		return $affectedrows;
	}

	function get_totalnum_by_uid($uid, $direction = 0) {
		$sqladd = '';
		if($direction == 0) {
			$sqladd = "uid='$uid'";
		} elseif($direction == 1) {
			$sqladd = "uid='$uid' AND direction='1'";
		} elseif($direction == 2) {
			$sqladd = "friendid='$uid' AND direction='1'";
		} elseif($direction == 3) {
			$sqladd = "uid='$uid' AND direction='3'";
		}
		$totalnum = $this->db->result_first("SELECT COUNT(*) FROM ".UC_DBTABLEPRE."friends WHERE $sqladd");
		return $totalnum;
	}

	function get_list($uid, $page, $pagesize, $totalnum, $direction = 0) {
		$start = $this->base->page_get_start($page, $pagesize, $totalnum);
		$sqladd = '';
		if($direction == 0) {
			$sqladd = "f.uid='$uid'";
		} elseif($direction == 1) {
			$sqladd = "f.uid='$uid' AND f.direction='1'";
		} elseif($direction == 2) {
			$sqladd = "f.friendid='$uid' AND f.direction='1'";
		} elseif($direction == 3) {
			$sqladd = "f.uid='$uid' AND f.direction='3'";
		}
		if($sqladd) {
			$data = $this->db->fetch_all("SELECT f.*, m.username FROM ".UC_DBTABLEPRE."friends f LEFT JOIN ".UC_DBTABLEPRE."members m ON f.friendid=m.uid WHERE $sqladd LIMIT $start, $pagesize");
			return $data;
		} else {
			return array();
		}
	}
}

?>