<?php
class DataSpatial extends Zend_Controller_Plugin_Abstract
{
	private $db;				//传入PDO对象.
	private $auth = NULL;		//Zend_Auth 对象
	
	//使用到的公共变量
	public $tbl = "dataspatial";
	
	function __construct($db)
	{
		$this->db = $db;
	}
	
	function fetch($uid=0,$keyword='')
	{
		$wheresql=' 1=1 ';
		if(!empty($keyword))
		{
			if(preg_match("/\'/",$keyword))
			{
				$keyword = preg_replace("/\'/","''",$keyword);
			}	
			$wheresql.=" and m.title like '%$keyword%'";
		}
		if(empty($uid))
		{
			$sql = "SELECT m.title,d.id,d.uuid,st_astext(d.the_geom) as spatial,d.temporal,d.ts_changed FROM ".$this->tbl." d left join metadata m on d.uuid=m.uuid where ".$wheresql."ORDER BY d.ts_changed desc";
		}else{
			$sql = "SELECT  m.title,d.id,d.uuid,st_astext(d.the_geom) as spatial,d.temporal,d.ts_changed FROM ".$this->tbl." d
					left join metadata m on d.uuid=m.uuid
					LEFT JOIN mdauthor a ON d.uuid=a.uuid
					WHERE a.userid=".$uid." AND a.status>0 and ".$wheresql." 
					ORDER BY d.ts_published desc,d.ts_submitted desc,d.ts_created DESC
					";
		}
		$rs = $this->db->query($sql);
		$rows = $rs->fetchAll();
		return $rows;
	}
	
	function update($data,$uuid,$uid=0){
		if(!empty($uid))
		{
			include_once("data/Author.php");
			$author = new Author($this->db);
			if($author->checkAuthor($uuid,$uid)==false)
			{
				return "您没有权限";
			}
		}
		$this->db->beginTransaction();
		try
		{
			foreach($data['info'] as $item)
			{
				if ($item['id']>0)
				{
					//update
					if (isset($item['temporal']))
						$sql="update $this->tbl set the_geom=ST_GeometryFromText('SRID=4326;".$item['spatial']."'),temporal='".$item['temporal']."',ts_changed=now() where id=".$item['id']." and uuid='".$data['uuid']."'";
					else
						$sql="update $this->tbl set the_geom=ST_GeometryFromText('SRID=4326;".$item['spatial']."'),ts_changed=now() where id=".$item['id']." and uuid='".$data['uuid']."'";
				} else {
					//insert
					if (isset($item['temporal']))
						$sql="insert into $this->tbl (uuid,the_geom,temporal) values('".$data['uuid']."',ST_GeometryFromText('SRID=4326;".$item['spatial']."'),'".$item['temporal']."')";
					else
						$sql="insert into $this->tbl (uuid,the_geom) values('".$data['uuid']."',ST_GeometryFromText('SRID=4326;".$item['spatial']."'))";
				}
				$this->db->exec($sql);
			}
			$this->db->commit();
			return true;
		} catch (Exception $e) {
			$this->db->rollBack();
			return $e->getMessage();
		}
	}
	
	function view($id)
	{
		if(is_numeric($id))
		{
			$sql = "SELECT  m.title,d.id,d.uuid,st_astext(d.the_geom) as spatial,d.temporal,d.ts_changed FROM ".$this->tbl." d left join metadata m on d.uuid=m.uuid WHERE d.id=$id";
		}else{
			$sql = "SELECT  m.title,d.id,d.uuid,st_astext(d.the_geom) as spatial,d.temporal,d.ts_changed FROM ".$this->tbl." d left join metadata m on d.uuid=m.uuid WHERE d.uuid='$id'";
		}
		$rs = $this->db->query($sql);
		$row = $rs->fetchAll();
		return $row;
	}
	
	function delete($id,$uid=0){
		if(!is_numeric($id))
		{
			return "参数错误";
		}
		if($uid != 0){
			$sql = "SELECT uuid FROM ".$this->tbl." WHERE id=$id";
			$rs = $this->db->query($sql);
			$row = $rs->fetch();
			if(isset($row['uuid']) && !empty($row['uuid'])){
				include_once("data/Author.php");
				$author = new Author($this->db);
				if($author->checkAuthor($row['uuid'],$uid)==false)
				{
					return "您没有权限";
				}
				$condition = " id=$id ";
				$sql = "DELETE FROM ".$this->tbl." WHERE $condition";
				return $this->db->exec($sql);
				}else{
					return "该记录不存在";
				}
		}else{
			$condition = " id=$id ";
			$sql = "DELETE FROM ".$this->tbl." WHERE $condition";
			return $this->db->exec($sql);
		}
	}
	
	function _getParams(Zend_Controller_Request_Abstract $request)
	{
		$data = array(
					'uuid' => trim($request->getParam('uuid')),
					'info'=>$_POST['info']
				);
		return $data;
	}
	
	function checkinfo($info){
		if(!is_array($info)){
			return NULL;
		}
		foreach($info as $k=>$v)
		{
			if(empty($v['spatial']) && empty($v['temporal']))
			{
				unset($info[$k]);
			}else{
				if(empty($v['spatial']))
				{
					return "请输入 $k 中的空间范围";
				}
			}
		}
		return $info;
	}
	
	function mkspatial($e,$s,$w,$n)
	{
		$str='GeometryCollection(';
		if (($e==$w) && ($s==$n))
		{
			$str.="Point($e $s)";
		} else {
			$str.="Polygon(($e $s,$e $n,$w $n,$w $s,$e $s))";
		}
		$str.=')';
		return $str;
	}
	
	function mktemporal($begin,$end=null)
	{
		if (!$begin) return '';
		$str='[';
		$begin=date('Y-m-d',strtotime($begin));
		if (isset($end)) $end=date('Y-m-d',strtotime($end));
		if (isset($end) && ($end!=$begin))
		{
			$str.="$begin,$end";
		} else {
			$str.="$begin,$begin";
		}
		$str.=']';
		return $str;
	}

}