<?php
class news
{
	private $db;  			//传入PDO对象
	public $ptype; 			//文档分类
	public $tbl_archives; 	//文档表
	public $tbl_categorys;	//栏目表
	public $tbl_catalog;	//文档栏目关联表
	public $tbl_tag;		//关键字表

	function __construct($db)
	{
		$this->db = $db;
		$this->ptype();
		$this->tbl_archives = "archive";
		$this->tbl_categorys = "ar_category";
		$this->tbl_catalog = "ar_catalog";
		$this->tbl_tag = "ar_tag";
	}
	
	//文档分类
	//在数组中设置档案分类
	// "中文名称" => "数据库中标识"
	function ptype (){
		$this->ptype = array(
			"新闻" => "news",
			"数据新闻" => "datanews",
			"说明文档" => "help",
			"FAQ" => "faq"
		);
	}//ptype()

	/*
	递归获得所有栏目
	*/
	function getAllCategory($hide = true){
		
		if($hide == -1)
		{
			$sql = "SELECT c.* FROM ".$this->tbl_categorys." c
				ORDER BY displayorder asc";
		}else{
			$sql = "SELECT c.* FROM ".$this->tbl_categorys." c
				WHERE is_pub = $hide
				ORDER BY displayorder asc";
		}
		
		$re = $this->db->query($sql);
		$categorys = $re->fetchAll();
		
		return $categorys;
	}
	
	//取得最顶级的栏目
	function getTopType(){
		$sql = "SELECT c.* FROM ".$this->tbl_categorys." c
				WHERE is_pub = true AND fid=0
				ORDER BY displayorder asc";
		$re = $this->db->query($sql);
		$categorys = $re->fetchAll();
		return $categorys;
	}
	
	//获得栏目
	function getCategory($id)
	{
		$sql = "SELECT * FROM ".$this->tbl_categorys." WHERE id=?";
		$sth = $this->db->prepare($sql);
		$sth->execute(array($id));
		$rows = $sth->fetch();
		return $rows;
	}
	
	/*
	写入关系表
	*/
	function ToCatalog($aid,$cid,$uuid='',$status=0){
		
		if(empty($aid) || !is_numeric($aid))
		{
			return false;
		}
		
		if(empty($cid) && empty($uuid))
		{
			return false;
		}
		
		$data = array(
			"aid" => $aid,
			"cid" => $cid,
			"status" => $status
		);
		
		if(!empty($uuid))
		{
			$data['uuid'] = $uuid;
		}
		
		if($this->db->insert($this->tbl_catalog,$data))
		{
			return true;
		}else{
			return false;
		}
		
	}//ToCatalog()
	
	//写入标签关系
	function MakeTags(){
		
		return true;
		
	}//MakeTags
	
	//修改文档状态
	function ChangeStatus($aid,$pub){
		
		if(empty($aid) || !is_numeric($aid))
		{
			return false;
		}
		
		if(!is_bool($pub))
		{
			return false;
		}
		
		$data = array(
			"is_pub" => $pub
		);
		
		if($this->db->update($this->tbl_archives,$data,"id=$aid"))
		{
			return true;
		}else{
			return false;
		}
	}//修改文档状态
	
	//删除文档
	function DeleteArchives($aid){
		
		if(empty($aid) || !is_numeric($aid))
		{
			return false;
		}
		
		$sql = "DELETE FROM ".$this->tbl_archives." WHERE id=$aid";
		@$this->db->exec($sql);
		
		$sql = "DELETE FROM ".$this->tbl_catalog." WHERE aid=$aid";
		@$this->db->exec($sql);
		
		return true;
	}//DeleteArchives
}