<?php

/**
 * 广告服务类
 */
class Service_Ad{

	public function __construct(){
		$this->ad_model = new AdModel();
	}

	/**
	 * 获取所有广告
	 * @param  array   $query  [description]
	 * @param  array   $fields [description]
	 * @param  array   $sort   [description]
	 * @param  integer $limit  [description]
	 * @param  integer $skip   [description]
	 * @return [type]          [description]
	 */
	public function getAdList($query=array(),$fields=array(),$sort=array(),$limit=0,$skip=0){
		return $this->ad_model->getList($query, $fields, $sort, $limit, $skip);
	}

	/**
	 * 获取广告数量
	 * @return [type] [description]
	 */
	public function getAdTotal($query=array(),$limit=0,$skip=0){
		return $this->ad_model->count($query, $limit, $skip);
	}

	/**
	 * 获取某个广告的信息
	 * @param  array  $query [description]
	 * @param  array  $field [description]
	 * @return [type]        [description]
	 */
	public function getAdInfo($query = array(), $field = array()){
		return $this->ad_model->get($query, $field);
	}

	/**
	 * 添加广告
	 * @param [type] $data [description]
	 */
	public function add($data){
		return $this->ad_model->add($data);
	}

	/**
	 * 修改广告
	 * @param  [type] $data  [description]
	 * @param  [type] $query [description]
	 * @return [type]        [description]
	 */
	public function update($data, $query){
		return $this->ad_model->update($data, $query);
	}

	/**
	 * 删除广告
	 * @param  [type] $query [description]
	 * @return [type]        [description]
	 */
	public function delete($query){
		return $this->ad_model->delete($query);
	}


}