<?php

class AnswerDao {
	
	public $id;
	
	public $qid;
	
	public $title;
	
	public $author;
	
	public $authorid;
	
	public $time;
	
	public $adopttime;
	
	public $content;
	
	public $comment;
	
	public $status;
	
	public $ip;
	
	public $tag;
	
	public $support;
	
	public $against;
	
	public $_table = 'zhask_answer';
	
	public $_primarykey = "id";
	
	public $_fields = array ('id', 'qid', 'title', 'author', 'authorid', 'time', 'adopttime', 'content', 'comment', 'status', 'ip', 'tag', 'support', 'against' );
	
	/**
	 * 删除某个用户的所以回答
	 * @param unknown_type $uid
	 */
	function delete_answer_by_authorid($uid = 0) {
		
		$sql = "delete from " . t_answer . " where authorid = " . $uid;
		
		Doo::db ()->query ( $sql );
	}
	
	/**
	 * 增加赞同数
	 * @param unknown_type $aid
	 */
	function update_support_answer($aid = 0) {
		$sql = "UPDATE `" . t_answer . "` SET  `support` = `support` + 1 WHERE `id` = " . $aid;
		
		$query = Doo::db ()->query ( $sql );
	}
	
	/**
	 * 获取回答用户信息
	 * @param unknown_type $id
	 */
	function get_answer_user_info_by_id($id = 0) {
		$sql = "select * from " . t_answer . " as a left join " . t_user . " as b on (a.authorid=b.uid) left join " . t_usergroup . " as c on (b.groupid=c.groupid) where a.qid=" . $id;
		
		$query = Doo::db ()->query ( $sql );
		
		$result = $query->fetchAll ();
		
		return $result;
	}
	
	/**
	 * 添加一个追问
	 * @param unknown_type $data
	 */
	public function update_taginfo_by_id($data = array()) {
		$sql = "UPDATE `" . t_answer . "` SET  `tag` = '" . $data ['tag'] . "' ,tagtime='".$data ['tagtime']."'  WHERE `id` = " . $data ['id'];
		
		$query = Doo::db ()->query ( $sql );
	}
	
	/**
	 * 获取回答信息
	 * @param unknown_type $data
	 */
	public function get_answer_by_id($id = 0) {
		$sql = "select * from " . t_answer . " where id=" . $id . " limit 1";
		
		$query = Doo::db ()->query ( $sql );
		
		$result = $query->fetch ();
		
		return $result;
	}
	
	/**
	 * 获取回答信息
	 * @param unknown_type $data
	 */
	public function get_answer_by_qid($qid = 0) {
		$sql = "select * from " . t_answer . " where qid=" . $qid ;
		
		$query = Doo::db ()->query ( $sql );
		
		$result = $query->fetchAll ();
		
		return $result;
	}
	
	/**
	 * 获取用户回答的记录数
	 * @param unknown_type $uid
	 */
	public function get_answer_count_by_uid($uid = 0) {
		$sql = "select count(*) as count from " . t_answer . " where authorid = " . $uid;
		
		$query = Doo::db ()->query ( $sql );
		
		$result = $query->fetch ();
		
		return $result;
	}
	
	/**
	 * 获取用户回答信息
	 * @param unknown_type $uid
	 * @param unknown_type $limit
	 */
	public function get_answer_list($uid = 0, $limit = array()) {
		$limit = " order by a.time desc limit " . $limit ['lower'] . ", " . $limit ['size'] . "";
		
		$sql = "select *  from " . t_answer . " as a left join " . t_question . " as b on (b.id=a.qid and b.hidden=0) where a.authorid = " . $uid . $limit;
		
		$query = Doo::db ()->query ( $sql );
		
		$result = $query->fetchAll ();
		
		return $result;
	}
	
	/**
	 * 更新一条回答信息
	 * @param unknown_type $data
	 * @param unknown_type $condition
	 */
	function update_answer($data = array(), $condition = "") {
		
		$prams = array ();
		
		foreach ( $data as $key => $value ) {
			$src = $key . " = '" . $value . "' ";
			
			array_push ( $prams, $src );
		}
		
		$prams = implode ( ",", $prams );
		
		$sql = "UPDATE `" . t_answer . "` SET " . $prams . " " . $condition;
		
		$query = Doo::db ()->query ( $sql );
	}
	
	/**
	 * 根据回答ID，问题ID
	 * @param unknown_type $aid
	 * @param unknown_type $qid
	 */
	function get_answer_by_aqid ( $aid, $qid ){
		
		$sql = "select * from " . t_answer . " where id=" . $aid . " and qid=" . $qid;
		
		$query = Doo::db ()->query ( $sql );
		
		$result = $query->fetch ();
		
		return $result;
	}
	
	/**
	 * 根据回答ID，问题ID
	 * @param unknown_type $aid
	 * @param unknown_type $qid
	 */
	function get_answer_by_quid ( $qid, $uid ){
		
		$sql = "select * from " . t_answer . " where qid=" . $qid . " and authorid=" . $uid;
		
		$query = Doo::db ()->query ( $sql );
		
		$result = $query->fetch ();
		
		return $result;
	}
	
	/**
	 * 批量删除回答
	 * @param unknown_type $id
	 */
	function delete_answer_list($id = array()) {
		
		$id = implode ( ",", $id );
		
		$sql = "delete from " . $this->_table . " where id in ( " . $id . " )";
		
		Doo::db ()->query ( $sql );
	}
}

?>