<?php
//含沙量
//Sediment Concentration
namespace Westdc\Visual\Reader;

use Westdc\Visual\Record;
use Westdc\Visual\RecordInterface;

class Sc extends Record implements RecordInterface
{	
	function __construct()
	{
		parent::__construct(__CLASS__);
	}
	
	public $subset;
	
	public function switchDataset()
	{
		if(empty($this->subset))
		{
			$this->subset = "avg_sand";
			return;
		}
		
		switch($this->subset){
			case "avg":
				$this->subset = "avg_sand";
				break;
			case "max" :
				$this->subset = "max_sand";
				break;
			case "min" :
				$this->subset = "min_sand";
				break;
		}
		
		return;
	}
	
	public function getData()
	{
		$sql = "SELECT * FROM data_sands
				ORDER BY
					year ASC,
					month ASC
				";
				
		$rs = $this->db->query($sql);
		return $rs;

	}
	
	public function outPut()
	{
		$this->switchDataset();
		
		$rs = $this->getData();
		
		$data = array();
		
		while($row = $rs->fetch())
		{
			$row['utctime'] = $this->utcMsTime(mktime(0,0,0,$row['month'],0,$row['year']));
			$data[] = array($row['utctime'],$row[$this->subset]);
		}
		
		return $data;
	}

}