<?php

class CategoryDao {
	
	public $id;
	
	public $name;
	
	public $dir;
	
	public $pid;
	
	public $grade;
	
	public $displayorder;
	
	public $questions;
	
	public $_table = t_category;
	
	public $_primarykey = "id";
	
	public $_fields = array ('id', 'name', 'dir', 'pid', 'grade', 'displayorder', 'questions' );
	
	/**
	 * 获取擅长分类信息
	 * @param unknown_type $cids
	 */
	function get_expert_category_list($cids = "") {
		$sql = "select * from " . t_category . " where id in (" . $cids . ")";
		
		$query = Doo::db ()->query ( $sql );
		
		$result = $query->fetchAll ();
		
		return $result;
	}
	
	/**
	 * 获取分类信息
	 * @param unknown_type $data
	 * @param unknown_type $condition
	 * @param unknown_type $limit
	 */
	function get_category_list($data = array(), $condition = "", $limit = "") {
		
		foreach ( $data as $key => $value ) {
			if (is_numeric ( $value ))
				$condition .= " and " . $key . " = " . $value;
			else
				$condition .= " and " . $key . " like '%" . $value . "%' ";
		}
		
		$condition = ' where 1 ' . $condition . $limit;
		
		$sql = "select * from " . t_category . $condition;
		
		$query = Doo::db ()->query ( $sql );
		
		$result = $query->fetchAll ();
		
		return $result;
	}
	
	/**
	 * 批量删除分类和分类下的问题
	 * @param unknown_type $id
	 */
	function delete_category_list($id = array()) {
		
		$id = implode ( ",", $id );
		
		$sql = "delete from " . t_category . " where id in ( " . $id . " )";
		
		Doo::db ()->query ( $sql );
		
		$sql="delete ".t_question.",".t_answer." from ".t_question."  left join ".t_answer."  on (".t_question.".id=".t_answer.".qid) where ".t_question.".cid in (".$id.")";

		Doo::db ()->query ( $sql );
	}
	
	/**
	 * 获取分类 根据ID
	 * @param unknown_type $id
	 */
	function get_category_by_id ( $id=0 ){
		$sql = "select * from " . t_category . " where id=".$id;
		
		$query = Doo::db ()->query ( $sql );
		
		$result = $query->fetch ();
		
		return $result;
	}
}

?>