<?php
namespace Westdc\Metadata;

use Sookon\Helpers\View as view;
use Sookon\Helpers\Dbh as dbh;
use Sookon\Helpers\Pdo;
use Sookon\Helpers\Config;
use Sookon\Helpers\Table;
use Zend\Http\PhpEnvironment\Request;

class Metadata
{
	private $db;				//传入PDO对象
	private $config;			//站点设置
	private $table;
	
	public $opt;
	
	protected $events = NULL;
		
	function __construct()
	{
		$this->db = new Pdo;
		$this->config = Config::get();
		$this->table = new Table;
		
		$this->opt = new \stdClass();
		
		$this->opt->sort = "DESC";
		$this->opt->logic = "AND";
	}
	
	public function fetchAll()
	{
		$wheresql = array();
		
		if(isset($this->opt->where) && !empty($this->opt->where))
			$wheresql = array_merge($wheresql,$this->opt->where);
		
		if(count($wheresql)>0)
		{
			$wheresql = " WHERE ".join($wheresql," ".$this->opt->logic." ");
		}else{
			$wheresql = '';
		}
		
		if(!empty($this->opt->order))
		{
			$order = $this->opt->order;
		}else{
			$order = "m.id";
		}
		
		$sql = "SELECT 
					m.*,md.viewed, ds.id as datasetid 
				FROM {$this->table->metadata} m
				LEFT join {$this->table->metadata_stat} md on m.uuid=md.uuid
				LEFT JOIN mdstatus st ON md.uuid=st.uuid
				left join dataset ds on m.uuid=ds.uuid
				$wheresql
				ORDER BY $order {$this->opt->sort}";
		
		if(!empty($this->opt->start))
		{
			$sql .= " START {$this->opt->start} ";
		}
		
		if(!empty($this->opt->limit)){
			$sql .= " LIMIT {$this->opt->limit} ";
		}
		//view::Dump($sql);
		$rs = $this->db->query($sql);
		return $rs->fetchAll();
	}
	
	public function fetch($id)
	{
		if(is_numeric($id))
		{
			$sql = "SELECT * FROM {$this->table->metadata} WHERE id=$id";
		}else if(\Sookon\Helpers\Uuid::test($id)){
			$sql = "SELECT * FROM {$this->table->metadata} WHERE uuid='$id'";
		}else{
			return false;
		}
		
		$rs = $this->db->query($sql);
		return $rs->fetch();
	}
	
}