__construct(); } function __construct() { $this->addActions(); } // SETTINGS // init settings on start var $settings = null; function getSettings() { // get settings if (!$this->settings) { $this->settings = get_option($this->_optionName, array()); } // when settings are still null if (!$this->settings) { // do something $this->settings = array( 'amazon-api-key' => '', 'amazon-secret-key' => '', //'amazon-associates-id' => '', 'amazon-associates-id' => 'ramoonusweb07-20', ); // @todo: make wp_options } return $this->settings; } // save settings function saveSettings($settings) { if (!is_array($settings)) { return; } update_option($this->_optionName, $settings); } // delete settings function deleteSettings() { delete_option($this->_optionName); } // continue function addActions() { add_action('admin_menu', array($this, 'addAdministrativeInterfaceItems')); add_action('admin_notices', array($this, 'addAdministrativeWarnings')); add_action('admin_init', array($this, 'checkForSettingsSave')); add_action('wp_ajax_arfw', array($this, 'handleAjaxSearchRequest')); } function addAdministrativeInterfaceItems() { add_options_page(__('Amazon Reloaded'), __('Amazon Reloaded'), 'manage_options', 'amazon-reloaded', array($this, 'displaySettingsPage')); add_meta_box('amazon-reloaded-for-wordpress', __('Amazon Reloaded'), array($this, 'displayMetaBox'), 'post'); add_meta_box('amazon-reloaded-for-wordpress', __('Amazon Reloaded'), array($this, 'displayMetaBox'), 'page'); // when writing a post or page if ($this->isPageOrPostInterface()) { // load javascript - based on jQuery wp_enqueue_script('arfw', plugins_url('resources/amazon-reloaded.js', __FILE__), array('jquery'), $this->version); // load css wp_enqueue_style('arfw', plugins_url('resources/amazon-reloaded.css', __FILE__), array(), $this->version); } } function addAdministrativeWarnings() { if ($this->isPageOrPostInterface() && $this->credentialsAreEmpty()) { echo '

'.sprintf(__('You have not yet set up your Amazon credentials. In order to search for products using the Amazon Reloaded plugin, you should do so now.'), admin_url('options-general.php?page=amazon-reloaded')).'

'; } } function isPageOrPostInterface() { global $pagenow; return (false !== strpos($pagenow, 'post') || false !== strpos($pagenow, 'page')); } function handleAjaxSearchRequest() { $data = $_POST; $terms = $data['terms']; $index = $data['index']; $url = $this->signUrl($this->getAmazonProductSearchRequestUrl($terms, $index)); $response = wp_remote_get($url, array('timeout'=>30)); if( is_wp_error($response) ) { $encodable = array('success'=>false); } else { $responseDocument = DOMDocument::loadXML($response['body']); $errorFields = $responseDocument->getElementsByTagName('Error'); if ($errorFields->length == 0) { // Normal Case $encodable = array(); $encodable['success'] = true; $items = array(); foreach ($responseDocument->getElementsByTagName('Item') as $item) { $asin = $this->getFirstElementValueForTagName($item, 'ASIN'); $name = $this->getFirstElementValueForTagName($item, 'Title'); $detailPageUrl = $this->getFirstElementValueForTagName($item, 'DetailPageURL'); $imageUrls = array(); $images = $item->getElementsByTagName('URL'); for ($imageNumber = 0; $imageNumber < $images->length; $imageNumber++) { $imageUrls[] = $images->item($imageNumber)->nodeValue; } $item = array('asin'=>$asin, 'name'=>$name, 'detailPageURL'=>$detailPageUrl, 'imageURLs'=>$imageUrls); $items[] = $item; } $encodable['items'] = $items; } else { $encodable = array('success'=>false); } } print json_encode($encodable); exit(); } function getFirstElementValueForTagName($document, $tagName) { $list = $document->getElementsByTagName($tagName); if ($list->length == 0) { return ''; } else { return $list->item(0)->nodeValue; } } function checkForSettingsSave() { if (isset($_POST['save-arfw-settings']) && current_user_can('manage_options') && check_admin_referer('save-arfw-settings')) { $this->saveSettingsFromPost(); wp_redirect(admin_url('options-general.php?page=amazon-reloaded&updated=1')); exit(); } if (isset($_POST['test-arfw-settings']) && current_user_can('manage_options') && check_admin_referer('test-arfw-settings','_wpnonce2')) { $this->saveSettingsFromPost(); $redirectUrl = admin_url('options-general.php?page=amazon-reloaded'); if ($this->credentialsAreValid()) { $redirectUrl = add_query_arg(array('credentials-success'=>1), $redirectUrl); } else { $redirectUrl = add_query_arg(array('credentials-failure'=>1), $redirectUrl); } wp_redirect($redirectUrl); exit(); } } function saveSettingsFromPost() { $settings = $this->getSettings(); $settings['amazon-secret-key'] = trim(stripslashes($_POST['amazon-secret-key'])); $settings['amazon-api-key'] = trim(stripslashes($_POST['amazon-api-key'])); $settings['amazon-associates-id'] = trim(stripslashes($_POST['amazon-associates-id'])); $settings['amazon-locale'] = in_array($_POST['amazon-locale'], $this->locales) ? $_POST['amazon-locale'] : 'com'; $this->saveSettings($settings); } // display metabox function displayMetaBox() { require_once('views/meta-box.php'); } // display settings page function displaySettingsPage() { require_once('views/settings.php'); } // AMAZON // Thanks Brandon Checketts function signUrl($urlToSign) { $settings = $this->getSettings(); $originalUrl = $urlToSign; // Decode anything already encoded $url = urldecode($urlToSign); // Parse the URL into $urlparts $urlparts = parse_url($url); // Build $params with each name/value pair foreach (explode('&', $urlparts['query']) as $part) { if (strpos($part, '=')) { list($name, $value) = explode('=', $part); } else { $name = $part; $value = ''; } $params[$name] = $value; } // require_once a timestamp if none was provided if ( empty($params['Timestamp'])) { $params['Timestamp'] = gmdate('Y-m-d\TH:i:s\Z'); } // Sort the array by key ksort($params); // Build the canonical query string $canonical = ''; foreach ($params as $key=>$val) { $canonical .= "{$key}=".rawurlencode($val).'&'; } // Remove the trailing ampersand $canonical = preg_replace("/&$/", '', $canonical); // Some common replacements and ones that Amazon specifically mentions $canonical = str_replace(array(' ', '+', ',', ';'), array('%20', '%20', urlencode(','), urlencode(':')), $canonical); // Build the si $string_to_sign = "GET\n{$urlparts['host']}\n{$urlparts['path']}\n$canonical"; // Calculate our actual signature and base64 encode it $signature = base64_encode(hash_hmac('sha256', $string_to_sign, $settings['amazon-secret-key'], true)); // Finally re-build the URL with the proper string and require_once the Signature $url = "{$urlparts['scheme']}://{$urlparts['host']}{$urlparts['path']}?$canonical&Signature=".rawurlencode($signature); return $url; } function credentialsAreEmpty() { $settings = $this->getSettings(); return ( empty($settings['amazon-api-key']) || empty($settings['amazon-secret-key'])); } function credentialsAreValid() { // when not empty if ($this->credentialsAreEmpty()) { return false; } $url = $this->getAmazonHelpRequestUrl(); $url = $this->signUrl($url); $response = wp_remote_get($url); // when no error if( !is_wp_error($response) ) { $responseDocument = DOMDocument::loadXML($response['body']); $errorFields = $responseDocument->getElementsByTagName('Error'); return $errorFields->length == 0; } else { return false; } } // search function getAmazonProductSearchRequestUrl($terms, $index) { $settings = $this->getSettings(); $url = "http://ecs.amazonaws.{$settings['amazon-locale']}/onca/xml?"; $url .= 'Service=AWSECommerceService&'; $url .= 'AssociateTag=' . urlencode( $settings[ 'amazon-associates-id'] ) . '&'; $url .= "AWSAccessKeyId={$settings['amazon-api-key']}&"; $url .= 'Operation=ItemSearch&'; $url .= 'Keywords='.urlencode(str_replace(' ', '%20', $terms)).'&'; $url .= 'SearchIndex='.urlencode($index).'&'; $url .= 'ResponseGroup=Small,Images'; return $url; } function getAmazonHelpRequestUrl() { $settings = $this->getSettings(); return 'http://ecs.amazonaws.'.$settings['amazon-locale'].'/onca/xml?Service=AWSECommerceService&AWSAccessKeyId='.$settings['amazon-api-key'].'&Operation=BrowseNodeLookup&BrowseNodeId=163357'; } } $arfw = new Amazon_Reloaded_For_WordPress; } ?>