shopify.php

<?php


	function shopify_app_install_url($shop_domain, $api_key)
	{
		return "http://$shop_domain/admin/api/auth?api_key=$api_key";
	}


	function shopify_is_app_installed($shop, $t, $timestamp, $signature, $shared_secret)
	{
		return (md5("{$shared_secret}shop={$shop}t={$t}timestamp={$timestamp}") === $signature);
	}


	function shopify_api_client($shops_myshopify_domain, $shops_token, $api_key, $secret, $private_app=false)
	{
		$password = $private_app ? $secret : md5($secret.$shops_token);
		$baseurl = "https://$shops_myshopify_domain/";


		return function ($method, $path, $params=array(), &$response_headers=array()) use ($baseurl, $password)
		{
			$url = $baseurl.ltrim($path, '/');
			$query = in_array($method, array('GET','DELETE')) ? $params : array();
			$payload = in_array($method, array('POST','PUT')) ? stripslashes(json_encode($params)) : array();
			$request_headers = in_array($method, array('POST','PUT')) ? array("Content-Type: application/json; charset=utf-8") : array();
			$request_headers['X-Shopify-Access-Token'] = $password;

			$response = curl_http_api_request_($method, $url, $query, $payload, $request_headers, $response_headers);
			$response = json_decode($response, true);

			if (isset($response['errors']) or ($response_headers['http_status_code'] >= 400))
				throw new ShopifyApiException(compact('method', 'path', 'params', 'response_headers', 'response', 'shops_myshopify_domain', 'shops_token'));

			return (is_array($response) and (count($response) > 0)) ? array_shift($response) : $response;
		};
	}

		function curl_http_api_request_($method, $url, $query='', $payload='', $request_headers=array(), &$response_headers=array())
		{
			$url = curl_append_query_($url, $query);
			$ch = curl_init($url);
			curl_setopts_($ch, $method, $payload, $request_headers);
			$response = curl_exec($ch);
			$errno = curl_errno($ch);
			$error = curl_error($ch);
			curl_close($ch);

			if ($errno) throw new ShopifyCurlException($error, $errno);

			list($message_headers, $message_body) = preg_split("/\r\n\r\n|\n\n|\r\r/", $response, 2);
			$response_headers = curl_parse_headers_($message_headers);

			return $message_body;
		}

			function curl_append_query_($url, $query)
			{
				if (empty($query)) return $url;
				if (is_array($query)) return "$url?".http_build_query($query);
				else return "$url?$query";
			}

			function curl_setopts_($ch, $method, $payload, $request_headers)
			{
				curl_setopt($ch, CURLOPT_HEADER, true);
				curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
				curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
				curl_setopt($ch, CURLOPT_MAXREDIRS, 3);
				curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
				curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
				curl_setopt($ch, CURLOPT_USERAGENT, 'HAC');
				curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
				curl_setopt($ch, CURLOPT_TIMEOUT, 30);

				if ('GET' == $method)
				{
					curl_setopt($ch, CURLOPT_HTTPGET, true);
				}
				else
				{
					curl_setopt ($ch, CURLOPT_CUSTOMREQUEST, $method);
					if (!empty($request_headers)) curl_setopt($ch, CURLOPT_HTTPHEADER, $request_headers);
					if (!empty($payload))
					{
						if (is_array($payload)) $payload = http_build_query($payload);
						curl_setopt ($ch, CURLOPT_POSTFIELDS, $payload);
					}
				}
			}

			function curl_parse_headers_($message_headers)
			{
				$header_lines = preg_split("/\r\n|\n|\r/", $message_headers);
				$headers = array();
				list(, $headers['http_status_code'], $headers['http_status_message']) = explode(' ', trim(array_shift($header_lines)), 3);
				foreach ($header_lines as $header_line)
				{
					list($name, $value) = explode(':', $header_line, 2);
					$name = strtolower($name);
					$headers[$name] = trim($value);
				}

				return $headers;
			}


	function shopify_calls_made($response_headers)
	{
		return shopify_shop_api_call_limit_param_(0, $response_headers);
	}

	function shopify_call_limit($response_headers)
	{
		return shopify_shop_api_call_limit_param_(1, $response_headers);
	}

	function shopify_calls_left($response_headers)
	{
		return shopify_call_limit($response_headers) - shopify_calls_made($response_headers);
	}

		function shopify_shop_api_call_limit_param_($index, $response_headers)
		{
			$params = explode('/', $response_headers['http_x_shopify_shop_api_call_limit']);
			return (int) $params[$index];
		}


	class ShopifyCurlException extends Exception { }
	class ShopifyApiException extends Exception
	{
		protected $info;

		function __construct($info)
		{
			$this->info = $info;
			parent::__construct($info['response_headers']['http_status_message'], $info['response_headers']['http_status_code']);
		}

		function getInfo() { $this->info; }
	}

?>