【Amazon Product Adverstising API】ASINからパッケージ寸法を取得するクラス

ItemLookup.php

<?php
namespace Acme;

class ItemLookup implements \IteratorAggregate
{
	private $items;
	
	private $item;
	
	public function __construct(\SimpleXMLElement $response)
	{
		if(!isset($response->Items)){
			if(isset($response->Error)){
				throw new \InvalidArgumentException($response->Error->Message);
			}else{
				throw new \InvalidArgumentException("Unexpected Error");
			}
		}
			
		$this->items =  $response->Items;
	}
	
	public function getRequest()
	{
		return $this->items->Request;
	}
	
	public function isValid()
	{
		return ($this->getRequest()->IsValid == "True") ? true : false;
	}
	
	public function getError()
	{
		return $this->getRequest()->Errors;
	}
	
	public function getIterator()
	{
		foreach($this->items->Item as $item)
			yield $this->item = $item;
	}
	
	public function getWeight()
	{
		if(!isset($this->item->ItemAttributes->PackageDimensions->Weight))
			return 0;
		
		return sprintf("%.2f", $this->item->ItemAttributes->PackageDimensions->Weight / 100 * 0.4536 * 1000);
	}
	public function getWidth()
	{
		if(!isset($this->item->ItemAttributes->PackageDimensions->Width))
			return 0;
		
		return sprintf("%.2f", $this->item->ItemAttributes->PackageDimensions->Width / 100 * 2.54);
	}
	
	public function getHeight()
	{
		if(!isset($this->item->ItemAttributes->PackageDimensions->Height))
			return 0;
		
		return sprintf("%.2f", $this->item->ItemAttributes->PackageDimensions->Height / 100 * 2.54);
	}
	
	public function getLength()
	{
		if(!isset($this->item->ItemAttributes->PackageDimensions->Length))
			return 0;
		
		return sprintf("%.2f", $this->item->ItemAttributes->PackageDimensions->Length / 100 * 2.54);
	}
	
	public function getAsin()
	{
		return (string) $this->item->ASIN;
	}
	
	public function getBrowsenodes()
	{
		return $this->item->BrowseNodes->BrowseNode;
	}
	
	public function getTitle()
	{
		return (string) $this->item->ItemAttributes->Title;
	}
	
	public function getSalesRank()
	{
		return (string) $this->item->SalesRank;
	}
	
}