public function pull_purchase_code($api, $purchase_code, $api_raw_data = array(), $existing_shub_user_id = false)
 {
     $purchase_code = strtolower(preg_replace('#([a-z0-9]{8})-?([a-z0-9]{4})-?([a-z0-9]{4})-?([a-z0-9]{4})-?([a-z0-9]{12})#', '$1-$2-$3-$4-$5', $purchase_code));
     // todo: add documentation that it needs to be named "Purchase Code"
     // todo: add a default extra value called Purchase Code.
     if (strlen($purchase_code) != 36) {
         return false;
     }
     // check existing purchase code and return that if it's cached
     $existing_purchase = shub_get_single('shub_envato_purchase', 'purchase_code', $purchase_code);
     if ($existing_purchase && $existing_purchase['shub_envato_purchase_id']) {
         // if there is a matching support id, grab that cached support data, add shub_user_id do it and return it
         // this matches our return data below.
         // if we don't find this then we continue below and call the API again to get fresh data.
         $existing_support = shub_get_single('shub_envato_support', array('shub_envato_purchase_id'), array($existing_purchase['shub_envato_purchase_id']));
         if ($existing_support && $existing_support['shub_user_id'] && $existing_support['support_data']) {
             $return = @json_decode($existing_support['support_data'], true);
             if ($return) {
                 $return['shub_user_id'] = $existing_support['shub_user_id'];
                 return $return;
             }
         }
     }
     $accounts = array();
     if (!$api) {
         // loop through accounts and try an API call on each one.
         $accounts = $this->get_accounts();
     }
     do {
         if ($accounts) {
             // grab an API from this account.
             $account = array_shift($accounts);
             $shub_envato_account = new shub_envato_account($account['shub_account_id']);
             // found the account, pull in the API and build the url
             $api = $shub_envato_account->get_api();
         }
         if (!$api) {
             break;
         }
         //            $result = $api->api('v1/market/private/user/verify-purchase:' . $purchase_code . '.json');
         $result = $api->api('v2/market/author/sale?code=' . $purchase_code);
         /*
                     {
                       "amount": "12.60",
                       "sold_at": "2015-08-18T21:30:02+10:00",
                       "item": {
                         "id": 1299019,
                         "name": "WooCommerce Australia Post Shipping Calculator",
                         "description": ...
                         "site": "codecanyon.net",
                         "classification": "wordpress/ecommerce/woocommerce/shipping",
                         "classification_url": "http://codecanyon.net/category/wordpress/ecommerce/woocommerce/shipping",
                         "price_cents": 1800,
                         "number_of_sales": 1054,
                         "author_username": "******",
                         "author_url": "http://codecanyon.net/user/dtbaker",
                         "author_image": "https://0.s3.envato.com/files/111547951/dtbaker-php-scripts-wordpress-themes-and-plugins.png",
                         "url": "http://codecanyon.net/item/woocommerce-australia-post-shipping-calculator/1299019",
                         "thumbnail_url": "https://0.s3.envato.com/files/15047665/thumb.png",
                         "summary": "High Resolution: No, Compatible With: WooCommerce 2.3.x, Software Version: WordPress 4.2, WordPress 4.1, WordPress 4.0, WordPress 3.9, WordPress 3.8, WordPress 3.7",
                         "rating": {
                           "rating": 3.82,
                           "count": 49
                         },
                         "updated_at": "2015-08-13T12:34:59+10:00",
                         "published_at": "2012-01-15T17:59:18+11:00",
                         "trending": false,
                         "previews": {
                           "landscape_preview": {
                             "landscape_url": "https://image-cc.s3.envato.com/files/15047663/preview.jpg"
                           }
                         }
                       },
                       "license": "Regular License",
                       "code": "c77ff344-9be4-4ba1-9e50-ce92e37c33e0",
                       "support_amount": ""
                     }
                     }*/
         if ($result && !empty($result['item']) && !empty($result['item']['id'])) {
             // valid purchase code.
             // what is the username attached to this purchase result?
             $envato_username = $result['buyer'];
             // find this user in our system.
             $shub_user = new SupportHubUser_Envato();
             if ($existing_shub_user_id) {
                 $shub_user->load($existing_shub_user_id);
             } else {
                 $shub_user->load_by_meta('envato_username', strtolower($envato_username));
             }
             if (!$shub_user->get('shub_user_id')) {
                 // no users exists in our system with this username.
                 // add a new one.
                 $shub_user->create_new();
             }
             if (!$shub_user->get('user_username')) {
                 $shub_user->update('user_username', $envato_username);
             }
             $shub_user->add_unique_meta('envato_username', strtolower($envato_username));
             // find out which product this purchase code is relating to
             $existing_products = SupportHub::getInstance()->get_products();
             // check if this item exists already
             $exists = false;
             foreach ($existing_products as $existing_product) {
                 if (isset($existing_product['product_data']['envato_item_id']) && $existing_product['product_data']['envato_item_id'] == $result['item']['id']) {
                     $exists = $existing_product['shub_product_id'];
                 }
             }
             $newproduct = new SupportHubProduct();
             if (!$exists) {
                 $newproduct->create_new();
             } else {
                 $newproduct->load($exists);
             }
             if (!$newproduct->get('product_name')) {
                 $newproduct->update('product_name', $result['item']['name']);
             }
             $existing_product_data = $newproduct->get('product_data');
             if (!is_array($existing_product_data)) {
                 $existing_product_data = array();
             }
             if (empty($existing_product_data['envato_item_id'])) {
                 $existing_product_data['envato_item_id'] = $result['item']['id'];
             }
             if (empty($existing_product_data['envato_item_data'])) {
                 // get these item details from api
                 $existing_product_data['envato_item_data'] = $result['item'];
                 if (empty($existing_product_data['image'])) {
                     $existing_product_data['image'] = $result['item']['thumbnail_url'];
                 }
                 if (empty($existing_product_data['url'])) {
                     $existing_product_data['url'] = $result['item']['url'];
                 }
             }
             $newproduct->update('product_data', $existing_product_data);
             if ($newproduct->get('shub_product_id')) {
             }
             $shub_envato_purchase_id = false;
             // store this in our purchase code database so we can access it easier later on
             $existing_purchase = shub_get_single('shub_envato_purchase', 'purchase_code', $purchase_code);
             if (!$existing_purchase) {
                 // see if we can find an existing purchase by this user at the same time, without a purchase code.
                 // (because results from the purchase api do not contian purchase codes)
                 $possible_purchases = shub_get_multiple('shub_envato_purchase', array('shub_user_id' => $shub_user->get('shub_user_id'), 'shub_product_id' => $newproduct->get('shub_product_id'), 'purchase_time' => strtotime($result['sold_at'])));
                 foreach ($possible_purchases as $possible_purchase) {
                     if (empty($possible_purchases['purchase_code'])) {
                         // this purchase came from the other api and doesn't have a purchase code.
                         // add it in!
                         $shub_envato_purchase_id = shub_update_insert('shub_envato_purchase_id', $possible_purchase['shub_envato_purchase_id'], 'shub_envato_purchase', array('purchase_code' => $purchase_code, 'api_time' => time()));
                         if (empty($possible_purchases['purchase_data'])) {
                             $raw_purchase_data = array_merge(array('author/sale' => $result), is_array($api_raw_data) ? $api_raw_data : array());
                             $shub_envato_purchase_id = shub_update_insert('shub_envato_purchase_id', $possible_purchase['shub_envato_purchase_id'], 'shub_envato_purchase', array('purchase_data' => json_encode($raw_purchase_data)));
                         }
                     }
                 }
             } else {
                 // we do have an existing purchase.
                 $shub_envato_purchase_id = $existing_purchase['shub_envato_purchase_id'];
                 //                    if (empty($existing_purchase['shub_user_id'])) {
                 shub_update_insert('shub_envato_purchase_id', $shub_envato_purchase_id, 'shub_envato_purchase', array('shub_user_id' => $shub_user->get('shub_user_id'), 'shub_product_id' => $newproduct->get('shub_product_id'), 'purchase_time' => strtotime($result['sold_at'])));
                 //                    }
             }
             if (!$shub_envato_purchase_id) {
                 // add new one
                 $raw_purchase_data = array_merge(array('author/sale' => $result), is_array($api_raw_data) ? $api_raw_data : array());
                 $shub_envato_purchase_id = shub_update_insert('shub_envato_purchase_id', false, 'shub_envato_purchase', array('shub_user_id' => $shub_user->get('shub_user_id'), 'shub_product_id' => $newproduct->get('shub_product_id'), 'envato_user_id' => 0, 'api_time' => time(), 'api_type' => 'author/sale', 'purchase_time' => strtotime($result['sold_at']), 'purchase_code' => $purchase_code, 'purchase_data' => json_encode($raw_purchase_data)));
             }
             if ($shub_envato_purchase_id) {
                 // support expiry time is 6 months from the purchase date, or as specified by the api result.
                 if (strtotime($result['sold_at']) < strtotime("2015-09-01")) {
                     $support_expiry_time = strtotime("+6 months", strtotime("2015-09-01"));
                 } else {
                     $support_expiry_time = strtotime("+6 months", strtotime($result['sold_at']));
                 }
                 if (!empty($result['supported_until'])) {
                     $support_expiry_time = strtotime($result['supported_until']);
                 }
                 $existing_support = shub_get_single('shub_envato_support', array('shub_envato_purchase_id'), array($shub_envato_purchase_id));
                 if ($existing_support && empty($existing_support['shub_user_id'])) {
                     shub_update_insert('shub_envato_support_id', $existing_support['shub_envato_support_id'], 'shub_envato_support', array('shub_user_id' => $shub_user->get('shub_user_id')));
                 }
                 if ($existing_support && $existing_support['shub_envato_support_id'] && $existing_support['start_time'] == strtotime($result['sold_at'])) {
                     // check the existing support expiry matches the one we have in the database.
                     if ($existing_support['end_time'] < $support_expiry_time) {
                         // we have a support extension!
                         $shub_envato_support_id = shub_update_insert('shub_envato_support_id', $existing_support['shub_envato_support_id'], 'shub_envato_support', array('end_time' => $support_expiry_time, 'api_type' => 'author/sale', 'support_data' => json_encode($result)));
                     }
                 } else {
                     // we are adding a new support entry
                     $shub_envato_support_id = shub_update_insert('shub_envato_support_id', false, 'shub_envato_support', array('shub_user_id' => $shub_user->get('shub_user_id'), 'shub_product_id' => $newproduct->get('shub_product_id'), 'shub_envato_purchase_id' => $shub_envato_purchase_id, 'api_type' => 'author/sale', 'start_time' => strtotime($result['sold_at']), 'end_time' => $support_expiry_time, 'support_data' => json_encode($result)));
                 }
             }
             $result['shub_user_id'] = $shub_user->get('shub_user_id');
             return $result;
         }
     } while (count($accounts));
     // if we get here it means the API request failed or it's an invalid purchase code.
     // log it in our database so we can at least re-check it at a later point in time or show it as failed in the UI somehow.
     $existing_purchase = shub_get_single('shub_envato_purchase', 'purchase_code', $purchase_code);
     if (!$existing_purchase) {
         $shub_envato_purchase_id = shub_update_insert('shub_envato_purchase_id', false, 'shub_envato_purchase', array('shub_user_id' => $existing_shub_user_id, 'shub_product_id' => 0, 'envato_user_id' => 0, 'api_type' => 'fail', 'purchase_time' => 0, 'purchase_code' => $purchase_code, 'purchase_data' => ''));
     }
     return false;
 }
 public function get_user_hints($user_hints = array())
 {
     $comments = $this->get_comments();
     $first_comment = current($comments);
     if (isset($first_comment['shub_user_id']) && $first_comment['shub_user_id']) {
         $user_hints['shub_user_id'][] = $first_comment['shub_user_id'];
     }
     $message_from = @json_decode($first_comment['message_from'], true);
     if ($message_from && isset($message_from['username'])) {
         //} && $message_from['username'] != $envato_message->get('account')->get( 'account_name' )){
         // this wont work if user changes their username, oh well.
         $other_users = new SupportHubUser_Envato();
         $other_users->load_by_meta('envato_username', $message_from['username']);
         if ($other_users->get('shub_user_id') && !in_array($other_users->get('shub_user_id'), $user_hints['shub_user_id'])) {
             // pass these back to the calling method so we can get the correct values.
             $user_hints['shub_user_id'][] = $other_users->get('shub_user_id');
         }
     }
     return $user_hints;
 }