<?php
/**
 * Archive - 统一文档类，实现各类文档的读取和IO操作，包括新闻、帮助、想法等。
 */
 
class Archive
{
	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;
		//文档的大分类
		//在数组中设置文档分类
		//"中文名称" => "数据库中标识"		
		$this->ptype = array(
			"新闻" => "news",
			"想法" => "idea",
			"帮助" => "help",
			"关于" => "about"
		);
		$this->tbl_archives = "archive";
		$this->tbl_categorys = "ar_category";
		$this->tbl_catalog = "ar_catalog";
		$this->tbl_tag = "ar_tag";
	}
	
	
	/*
	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()
	
	/*
	*	更改栏目	ChangeCatalog()
	*/
	function ChangeCatalog($aid,$cid,$uuid='',$status=0){
		
		if(empty($aid) || !is_numeric($aid))
		{
			return false;
		}
		
		if(empty($cid) && empty($uuid))
		{
			return false;
		}
		
		$data = array(
			"cid" => $cid,
			"status" => $status
		);
		
		if(!empty($uuid))
		{
			$data['uuid'] = $uuid;
		}
		
		if($this->db->update($this->tbl_catalog,$data,"aid=$aid"))
		{
			return true;
		}else{
			return false;
		}
		
	}//ChangeCatalog
	
	//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;
		}
		
		$this->DeleteTags($aid);
		
		$sql = "DELETE FROM ".$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
	
	//写入标签关系
	function MakeTags($aid,$keywords){
		
		$keywords = trim($keywords);
		if(empty($aid) || !is_numeric($aid))
		{
			return false;
		}
		
		if(preg_match("/,/",$keywords))
		{
			$tag = explode(",",$keywords);
		}else{
			if($this->db->insert($this->tbl_tag,array("id"=>$aid,"tag"=>$tag)))
			{
				return true;
			}else{
				return true;
			}
		}
		
		if(is_array($tag))
		{
			foreach($tag as $v)
			{
				$v = trim($v);
				if($v!='')
				{
					$this->db->insert($this->tbl_tag,array("id"=>$aid,"tag"=>$v));
				}
			}
		}
		
		return true;
		
	}//MakeTags
	
	//读取标签
	function GetTags($aid,$limit=0){
		
		if(empty($aid) || !is_numeric($aid))
		{
			return false;
		}
		
		$sql = "SELECT * FROM ".$this->tbl_tag." WHERE id=$aid";
		
		if(!empty($limit))
		{
			$sql .= " LIMIT $limit";
		}
		
		$sth = $this->db->query($sql);
		$rows = $sth->fetchAll();
		
		$keywords = array();
		foreach($rows as $k=>$v)
		{
			$keywords[] = $v['tag'];
		}
		
		return $keywords;
	}//GetTags
	
	//删除标签
	function DeleteTags($aid){
		
		if(empty($aid) || !is_numeric($aid))
		{
			return false;
		}
		
		$sql = "DELETE FROM ".$this->tbl_tag." WHERE id=$aid";
		@$this->db->exec($sql);
		return true;
	}//DeleteTags
	
	function getArchive($code='')
	{
		$sql="select a.* from ".$this->tbl_archives." a left join ".$this->tbl_catalog." ac on a.id=ac.aid left join ".$this->tbl_categorys." c on ac.cid=c.id ";
		if (!empty($code)) $sql.=" where c.code='".$code."'";
		$rs=$this->db->query($sql);
		$rows=$rs->fetchAll();
		return $rows;
	}
}