Subversion Repositories cheapmusic

<?php

include_once ('php/constants.php');

error_reporting(E_ALL);

// Get itunes listings

function get_amazon($query, $searchCondition) {

    $vendors = Vendors::getInstance();

    $config = $vendors->getVendor(Vendors::AMAZON);

    $needMatches = empty($_SESSION["discogs"]);

    $arrMusic = [];

    $arrDigital = [];

    $arrBooks = [];

    // Music

    $arrMusic = get_amazonCategory($config, $query, "Music", $needMatches);

    // Digital Music

    if ($_SESSION["filterMediaType"]["Digital"]) {

        $arrDigital = get_amazonCategory($config, $query, "DigitalMusic");

    }

    if ($_SESSION["filterMediaType"]["Book"]) {

        // Books

        $arrBooks = get_amazonCategory($config, $query, "Books");

    }

    return (array_merge($arrMusic, $arrDigital, $arrBooks));

}

// Get Amazon listings

function get_amazonCategory($config, $query, $searchIndex, $needMatches = false) {

    $numResults = $config['numResults'];

    if ($needMatches) {

        $_SESSION["discogs"] = "";

    }

    $response = getSearchCache("amazon", $query, $searchIndex);

    if ($response === false) {

        $serviceName = "ProductAdvertisingAPI";

        $region = "us-east-1";

        $accessKey = $config["access_key_id"];

        $secretKey = $config["secret_key"];

        $associate_tag = $config['associate_tag'];

$payload="{"

        ." \"Keywords\": \"$query\","

        ." \"Resources\": ["

        ."  \"Images.Primary.Medium\","

        ."  \"Images.Primary.Large\","

        ."  \"ItemInfo.ByLineInfo\","

        ."  \"ItemInfo.ContentInfo\","

        ."  \"ItemInfo.Classifications\","

        ."  \"ItemInfo.ExternalIds\","

        ."  \"ItemInfo.ManufactureInfo\","

        ."  \"ItemInfo.ProductInfo\","

        ."  \"ItemInfo.TechnicalInfo\","

        ."  \"ItemInfo.Title\","

        ."  \"Offers.Listings.Condition\","

        ."  \"Offers.Listings.Condition.SubCondition\","

        ."  \"Offers.Listings.DeliveryInfo.IsAmazonFulfilled\","

        ."  \"Offers.Listings.DeliveryInfo.IsFreeShippingEligible\","

        ."  \"Offers.Listings.DeliveryInfo.IsPrimeEligible\","

        ."  \"Offers.Listings.DeliveryInfo.ShippingCharges\","

        ."  \"Offers.Listings.MerchantInfo\","

        ."  \"Offers.Listings.Price\""

        ." ],"

        ." \"SearchIndex\": \"$searchIndex\","

        ." \"Availability\": \"Available\","

        ." \"Condition\": \"Any\","

        ." \"OfferCount\": 3,"

        ." \"SortBy\": \"Price:LowToHigh\","

        ." \"PartnerTag\": \"$associate_tag\","

        ." \"PartnerType\": \"Associates\","

        ." \"Marketplace\": \"www.amazon.com\""

        ."}";

        $host = "webservices.amazon.com";

        $uriPath = "/paapi5/searchitems";

        $awsv4 = new AwsV4($accessKey, $secretKey);

        $awsv4->setRegionName($region);

        $awsv4->setServiceName($serviceName);

        $awsv4->setPath($uriPath);

        $awsv4->setPayload($payload);

        $awsv4->setRequestMethod("POST");

        $awsv4->addHeader('content-encoding', 'amz-1.0');

        $awsv4->addHeader('content-type', 'application/json; charset=utf-8');

        $awsv4->addHeader('host', $host);

        $awsv4->addHeader('x-amz-target', 'com.amazon.paapi5.v1.ProductAdvertisingAPIv1.SearchItems');

        $headers = $awsv4->getHeaders();

        $headerArr = [];

        foreach ($headers as $key => $value) {

            $headerArr[] = $key . ': ' . $value;

        }

        $ch = curl_init();

        curl_setopt($ch, CURLOPT_HTTPHEADER, $headerArr);

        curl_setopt($ch, CURLOPT_URL, 'https://' . $host . $uriPath);

        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

        curl_setopt($ch, CURLOPT_TIMEOUT, 15);

        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);

        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0);

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

        curl_setopt($ch, CURLOPT_REFERER, 'https://' . $host . $uriPath);

        curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);

        curl_setopt($ch, CURLOPT_POST, 1);

        $response = curl_exec($ch);

        curl_close($ch);

        saveSearchCache("amazon", $query, $searchIndex, $response);

    }

    $parsed_json = json_decode($response);

//echo "<br><pre>";print_r($parsed_json);echo "</pre>";

    $arr = [];

    if (isset($parsed_json->Errors)) {

        foreach ($parsed_json->Errors as $error) {

            if ($error->Code != "NoResults") {

                my_error_log("Amazon Search - " . $error->Message . " (" . $error->Code . ")");

            }

        }

        return [];

    } else if (!isset($parsed_json->SearchResult)) {

        my_error_log("Amazon Search - No Search Result.");

        return [];

    }

    if ($needMatches) {

        $cnt = 0;

        $xh = new Html;

        $xh->init($_SESSION["htmlIndent"]);

        startMatches($xh);

    }

    $listings = 0;

    // If the response was loaded, parse it and store in array

    foreach ($parsed_json->SearchResult->Items as $current) {

        if (isset($current->ItemInfo->ExternalIds->UPCs)) {

            $barcode = (string)$current->ItemInfo->ExternalIds->UPCs->DisplayValues[0];

        }

        else if (isset($current->ItemInfo->ExternalIds->EANs)) {

            $barcode = (string)$current->ItemInfo->ExternalIds->EANs->DisplayValues[0];

        }

        else if (isset($current->ItemInfo->ExternalIds->ISBNs)) {

            $barcode = (string)$current->ItemInfo->ExternalIds->ISBNs->DisplayValues[0];

        }

        else if (isset($current->ItemInfo->ExternalIds->EISBNs)) {

            $barcode = (string)$current->ItemInfo->ExternalIds->EISBNs->DisplayValues[0];

        }

        else {

            $barcode = "";

        }

        $barcodeType = clsLibGTIN::GTINCheck($barcode, false, 1);

        $pic = !empty($current->Images->Primary->Medium->URL) ? (string)$current->Images->Primary->Medium->URL : "images/no-image-available.jpg";

        $pic = str_replace('http://', 'https://', $pic);

        if (empty($pic)) {

            continue;

        }

        if (strpos($current->ItemInfo->Classifications->Binding->DisplayValue, "Audio CD") !== false) {

            $mediaType = "CD";

        }

        else if (strpos($current->ItemInfo->Classifications->Binding->DisplayValue, "MP3 Music") !== false) {

            $mediaType = "Digital";

        }

        else if (strpos($current->ItemInfo->Classifications->Binding->DisplayValue, "Vinyl") !== false) {

            $mediaType = "Record";

        }

        else if (strpos($current->ItemInfo->Classifications->Binding->DisplayValue, "Paperback") !== false || strpos($current->ItemInfo->Classifications->Binding->DisplayValue, "Sheet") !== false || strpos($current->ItemInfo->Classifications->Binding->DisplayValue, "Hardcover") !== false) {

            $mediaType = "Book";

        }

        else {

            continue;

        }

        if ($needMatches) {

            // bugbug: check maxMasterCnt?

            addMatch($xh, $current, ++$cnt, $mediaType);

        }

        $title = (string)$current->ItemInfo->Title->DisplayValue;

        $artists = getArtists($current);

        $contributers = getContributers($current);

        if (!empty($artists)) {

            $title .= " by " . join(", ", $artists);

        }

        else if (!empty($contributers)) {

            $title .= " by " . join(", ", $contributers);

        }

        $url = str_replace('http://', 'https://', (string)$current->DetailPageURL);

        if (empty($url)) {

            continue;

        }

        $bestOffer = false;

        $url = str_replace('http://', 'https://', (string)$current->DetailPageURL);

        $url .= "&condition=";

        if (!empty($current->Offers->Listings)) {

            foreach ($current->Offers->Listings as $offer) {

                $country = 'US';

                if (isset($offer->MerchantInfo->DefaultShippingCountry)) {

                    $country = $offer->MerchantInfo->DefaultShippingCountry;

                }

                $merchantName = "Amazon";

                if (strpos($offer->MerchantInfo->Name, "Amazon") === false) {

                    $merchantName .= " Marketplace";

                }

                $condition = (string)$offer->Condition->Value;

                $url .= $condition;

                $detailCondition = $condition;

                if ($condition == "Collectible") {

                    $condition = 'Used';

                    $detailCondition = "Collectible";

                }

                if ($condition == "Refurbished") {

                    $condition = 'Used';

                    $detailCondition = "Refurbished";

                }

                $currency = (string)$offer->Price->Currency;

                $price = number_format(floatval($offer->Price->Amount) , 2, '.', '');

                if ($price <= "0.00") {

                    continue;

                }

                $timeLeft = 0;

                $listingType = 'Fixed';

                $location = 'US';

                $zip = '';

                $feedbackScore = - 1;

                $feedbackPercent = - 1;

                $sellerName = "";

                $handlingTime = 0;

                if ($offer->DeliveryInfo->IsPrimeEligible === true) {

                    $sellerName = "Prime";

                }

                if ($mediaType == "Digital") {

                    $shippingCost = 0.00;

                    $shippingEstimated = false;

                    $shippingCurrency = 'USD';

                }

                else {

                    $shippingCost = 3.99; // bugbug

                    $shippingEstimated = true; // bugbug

                    $shippingCurrency = 'USD';

                }

                $freeShippingCap = !empty($offer->DeliveryInfo->IsFreeShippingEligible) ? 25 : 0;

                if (++$listings > $numResults) {

                    continue;

                }

                $arr[] = array(

                    "Merchant" => $merchantName,

                    "Condition" => $condition,

                    "Title" => $title,

                    "Barcode" => $barcode,

                    "BarcodeType" => $barcodeType,

                    "Image" => $pic,

                    "URL" => $url,

                    "MediaType" => $mediaType,

                    "DetailCondition" => $detailCondition,

                    "Country" => $country,

                    "BestOffer" => $bestOffer,

                    "TimeLeft" => $timeLeft,

                    "Price" => $price,

                    "Currency" => $currency,

                    "ListingType" => $listingType,

                    "Location" => $location,

                    "Zip" => $zip,

                    "FeedbackScore" => $feedbackScore,

                    "FeedbackPercent" => $feedbackPercent,

                    "SellerName" => $sellerName,

                    "HandlingTime" => $handlingTime,

                    "ShippingCost" => $shippingCost,

                    "ShippingEstimated" => $shippingEstimated,

                    "ShippingCurrency" => $shippingCurrency,

                    "FreeShippingCap" => $freeShippingCap,

                    "Show" => true

                );

            }

        }

    }

    if ($needMatches) {

        if ($cnt = 0) {

            $_SESSION["discogs"] = "";

        }

        else {

            endMatches($xh);

            $_SESSION["discogs"] = $xh->flush();

            error_log(print_r($_SESSION["discogs"], 1));

        }

    }

    // If the response does not indicate 'Success,' log the error(s)

    /******************

    else {

        my_error_log($url);

        if (!empty($parsed_json->OperationRequest->Errors)) {

            foreach($parsed_json->OperationRequest->Errors->Error as $error){

                my_error_log($error->Message . " (" . $error->Code . ")");

            }

        } else if (!empty($parsed_json->Errors)) {

            foreach($parsed_json->OperationRequest->Errors->Error as $error){

                my_error_log($error->Message . " (" . $error->Code . ")");

            }

        } else if (!empty($parsed_json->Error)) {

            my_error_log($parsed_json->Error->Message . " (" . $parsed_json->Error->Code . ")");

        } else {

            my_error_log(print_r($result, 1));

        }

    }

    ******************/

    return $arr;

}

function startMatches(&$xh) {

    $xh->add_attribute("class", "container-fluid bg-light");

    $xh->tag('div');

    $xh->add_attribute("class", "text-center py-2");

    $xh->tag('h2', "Matching Albums");

    $xh->add_attribute("id", "discogsDeckForm");

    $xh->add_attribute("method", "post");

    $xh->add_attribute("action", "/index.php");

    $xh->tag('form');

    $xh->insert_code(inputSessionTab());

    $xh->insert_code(inputNonce());

    $xh->add_attribute("id", "discogsTitle");

    $xh->add_attribute("type", "hidden");

    $xh->add_attribute("name", "discogsTitle");

    $xh->add_attribute("value", "");

    $xh->single_tag('input');

    $xh->add_attribute("id", "discogsArtist");

    $xh->add_attribute("type", "hidden");

    $xh->add_attribute("name", "discogsArtist");

    $xh->add_attribute("value", "");

    $xh->single_tag('input');

    $xh->add_attribute("id", "discogsBarcode");

    $xh->add_attribute("type", "hidden");

    $xh->add_attribute("name", "discogsBarcode");

    $xh->add_attribute("value", "");

    $xh->single_tag('input');

    $xh->add_attribute("id", "discogsDeck");

    $xh->add_attribute("class", "card-deck");

    $xh->tag('div');

}

function endMatches(&$xh) {

    $xh->insert_code(discogsEvents());

    $xh->close(); // div

    $xh->close(); // form>";

    $xh->close(); // div>";

}

function addMatch(&$xh, $item, $cnt, $mediaType) {

    $xhmod = new Html;

    $xhmod->init($_SESSION["htmlIndent"]);

    $artists = getArtists($item);

    $contributers = getContributers($item);

    $label = "";

    if (!empty($item->ItemInfo->ByLineInfo->Manufacturer)) {

        $label = $item->ItemInfo->ByLineInfo->Manufacturer->DisplayValue;

    }

    $languages = [];

    if (!empty($item->ItemInfo->ContentInfo->Languages)) {

        foreach ($item->ItemInfo->ContentInfo->Languages->DisplayValues as $language) {

            if ((string)$language->Type != "Unknown") {

                $languages[] = $language->DisplayValue . " (" . $language->Type . ")";

            }

        }

    }

    $genres = [];

    if (!empty($item->ItemInfo->Genre)) {

        foreach($item->ItemInfo->Genre as $genre) {

            $genres[] = join(" ", array_map('ucfirst', explode('-', $genre)));

        }

    }

    $runningTime = "";

    if (!empty($item->ItemInfo->RunningTime)) {

        if ($mediaType != 'Digital') {

            $runningTime = (string)$item->ItemInfo->RunningTime . " minutes";

        } else {

            $runningTime = gmdate("H:i:s", (int)$item->ItemInfo->RunningTime);

        }

    }

    $xh->add_attribute("class", "card mx-auto discogs-card");

    $xh->tag('div');

    $xh->add_attribute("class", "card-header bg-secondary d-flex");

    $xh->tag('div');

    $searchArtists = "";

    $wlArtists = "";

    if (!empty($artists)) {

        if (count($artists) < 5) {

            $wlArtists = join(", ", $artists);

            if (!empty($artists) && $artists[0] != 'Various') {

                $searchArtists = join(" ", $artists);

            }

        } else {

            $wlArtists = "Various Artists";

        }

    }

    else if (!empty($contributers)) {

        if (count($contributers) < 5) {

            $wlArtists = join(", ", $contributers);

            if (!empty($contributers) && $contributers[0] != 'Various') {

                $searchArtists = join(" ", $contributers);

            }

        } else {

            $wlArtists = "Various Artists";

        }

    }

    $str = htmlentities((string)$item->ItemInfo->Title->DisplayValue);

    if (!empty($wlArtists)) {

        $str .= " by " . htmlentities($wlArtists);

    }

    $xh->add_attribute("class", "card-title font-weight-bold small flex-grow-1");

    $xh->tag('p', $str);

    $xh->close(); // div

    $thumbnail = !empty($item->Images->Primary->Medium->URL) ? (string)$item->Images->Primary->Medium->URL : "images/no-image-available.jpg";

    $xh->add_attribute("class", "card-body d-flex justify-content-center align-items-center p-1 m-0");

    $xh->tag('div');

    $xh->add_attribute("class", "btn p-0 m-0 lazyload");

    $xh->add_attribute("src", PIXEL);

    $xh->add_attribute("data-src",  $thumbnail);

    $xh->add_attribute("data-toggle", "modal");

    $xh->add_attribute("data-target", "#masterModal" . $cnt);

    $xh->add_attribute("title", "Album Information");

    $xh->add_attribute("data-toggle2", "tooltip");

    $xh->add_attribute("alt", "Cover Thumbnail");

    $xh->single_tag('img');

    $xh->close(); // div

    $xh->add_attribute("class", "card-footer bg-secondary p-0 m-0");

    $xh->tag('div');

    $xh->add_attribute("class", "container clearfix p-0 m-0");

    $xh->tag('div');

    $xh->add_attribute("class", "float-left btn-group-sm");

    $xh->tag('span');

    $xh->add_attribute("id", "discogsInfo" . $cnt);

    $xh->add_attribute("type", "button");

    $xh->add_attribute("class", "btn btn-info btn-sm");

    $xh->add_attribute("data-toggle", "modal");

    $xh->add_attribute("data-target", "#masterModal" . $cnt);

    $xh->add_attribute("title", "Album Information");

    $xh->add_attribute("aria-label", "Album Information");

    $xh->add_attribute("data-toggle2", "tooltip");

    $xh->tag('button');

    $xh->add_attribute("class", "material-icons");

    $xh->tag('i', "info_outline");

    $xh->close(); // button

    $xh->close(); // span

    $xh->add_attribute("class", "float-right btn-group-sm");

    $xh->tag('span');

    $barcode = "";

    $tmpBarcode = "";

    if (isset($item->ItemInfo->ExternalIds->UPCs)) {

        $tmpBarcode = (string)$item->ItemInfo->ExternalIds->UPCs->DisplayValues[0];

    }

    else if (isset($item->ItemInfo->ExternalIds->EANs)) {

        $tmpBarcode = (string)$item->ItemInfo->ExternalIds->EANs->DisplayValues[0];

    }

    else if (isset($item->ItemInfo->ExternalIds->ISBNs)) {

        $tmpBarcode = (string)$item->ItemInfo->ExternalIds->ISBNs->DisplayValues[0];

    }

    else if (isset($item->ItemInfo->ExternalIds->EISBNs)) {

        $tmpBarcode = (string)$item->ItemInfo->ExternalIds->EISBNs->DisplayValues[0];

    }

    $barcodeType = clsLibGTIN::GTINCheck($tmpBarcode, false, 1);

    if (!empty($barcodeType)) {

        $barcode = $tmpBarcode;

    }

    if (isLoggedIn() && !checkWishlist('asin', $item->ASIN)) {

        $wlArr = array(

            'asin' => (string)$item->ASIN,

            'title' => (string)$item->ItemInfo->Title->DisplayValue,

            'artist' => $wlArtists,

            'barcode' => $barcode,

            'thumbnail' => $thumbnail,

            'url' => (string)$item->DetailPageURL

        );

        $wl = base64_encode(json_encode($wlArr));

        $xh->add_attribute("id", "wl" . $cnt . "Btn");

        $xh->add_attribute("type", "button");

        $xh->add_attribute("class", "btn btn-info btn-sm");

        $xh->add_attribute("title", "Add to Wishlist");

        $xh->add_attribute("aria-label", "Add to Wishlist");

        $xh->add_attribute("data-toggle", "tooltip");

        $xh->add_attribute("data-user", $_SESSION['sessData']['userID']);

        $xh->add_attribute("data-cnt", $cnt);

        $xh->add_attribute("data-wl", $wl);

        $xh->tag('button');

        $xh->add_attribute("class", "material-icons");

        $xh->tag('i', "bookmark");

        $xh->close(); // button

    }

    $searchTitle = 'Searching for:<br><br><strong>' . htmlentities((string)$item->ItemInfo->Title->DisplayValue) . ' by ' . htmlentities($wlArtists) . '</strong>';

    if (!empty($barcode)) {

        $searchTitle .= " (" . displayBarcode($barcode) . ")";

    }

    $xh->tag('span', " ");

    $xh->add_attribute("id", "discogsSearch" . $cnt . "Btn");

    $xh->add_attribute("type", "submit");

    $xh->add_attribute("name", "submitBtn");

    $xh->add_attribute("value", "discogsSearch");

    $xh->add_attribute("class", "btn btn-success btn-sm");

    $xh->add_attribute("title", "Search for Store Offers");

    $xh->add_attribute("aria-label", "Search for Store Offers");

    $xh->add_attribute("data-toggle", "tooltip");

    $xh->add_attribute("data-title", htmlentities((string)$item->ItemInfo->Title->DisplayValue));

    $xh->add_attribute("data-artist", htmlentities($searchArtists));

    $xh->add_attribute("data-barcode", $barcode);

    $xh->add_attribute("data-search-title", $searchTitle);

    $xh->tag('button');

    $xh->add_attribute("class", "material-icons");

    $xh->tag('i', "search");

    $xh->close(); // button

    $xh->close(); // span

    $xh->close(); // div

    $xh->add_attribute("id", "wishlistAdd" . $cnt);

    $xh->tag('span', "");

    $xh->close(); // div

    $xhmod->add_attribute("id", "masterModal" . $cnt);

    $xhmod->add_attribute("class", "modal");

    $xhmod->tag('div');

    $xhmod->add_attribute("class", "modal-dialog");

    $xhmod->tag('div');

    $xhmod->add_attribute("class", "modal-content");

    $xhmod->tag('div');

    $xhmod->add_attribute("class", "modal-header bg-secondary");

    $xhmod->tag('div');

    $xhmod->add_attribute("class", "modal-title mx-auto display-6");

    $xhmod->tag('p', htmlentities((string)$item->ItemInfo->Title->DisplayValue) . " by " . htmlentities($wlArtists));

    $xhmod->add_attribute("type", "button");

    $xhmod->add_attribute("class", "close");

    $xhmod->add_attribute("data-dismiss", "modal");

    $xhmod->tag('button');

    $xhmod->add_attribute("class", "material-icons btn-dismiss");

    $xhmod->tag('i', "cancel_presentation");

    $xhmod->close(); // button

    $xhmod->close(); // div

    $xhmod->add_attribute("class", "modal-body mx-auto");

    $xhmod->tag('div');

    if (!empty($item->Images->Primary->Large->URL)) {

        $xhmod->add_attribute("class", "responsive-image mx-auto mb-4 lazyload");

        $xhmod->add_attribute("src", PIXEL);

        $xhmod->add_attribute("data-src", (string)$item->Images->Primary->Large->URL);

        $xhmod->add_attribute("alt", "Cover Image");

        $xhmod->single_tag('img');

    }

    $xhmod->add_attribute("class", "table-borderless table-condensed small mx-auto");

    $xhmod->tag('table');

    $xhmod->tag('tr');

    $xhmod->add_attribute("class", "px-1");

    $xhmod->tag('td', "Title:");

    $xhmod->add_attribute("class", "px-1");

    $xhmod->tag('td', htmlentities((string)$item->ItemInfo->Title->DisplayValue));

    $xhmod->close(); // tr

    $xhmod->tag('tr');

    $xhmod->add_attribute("class", "px-1");

    $xhmod->tag('td', "Artist:");

    $xhmod->add_attribute("class", "px-1");

    $xhmod->tag('td', htmlentities(join(", ", $artists)));

    $xhmod->close(); // tr

    if (!empty($contributers)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Creator:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities(join(", ", $contributers)));

        $xhmod->close(); // tr

    }

    if (!empty($actors)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Actor:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities(join(", ", $actors)));

        $xhmod->close(); // tr

    }

    if (!empty($directors)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Director:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities(join(", ", $directors)));

        $xhmod->close(); // tr

    }

    if (!empty($authors)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Author:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities(join(", ", $authors)));

        $xhmod->close(); // tr

    }

    if (!empty($item->ItemInfo->Classifications->Binding)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Type:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities((string)$item->ItemInfo->Classifications->Binding->DisplayValue));

        $xhmod->close(); // tr

    }

    if (!empty($item->ItemInfo->MediaType)) { //

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Media Type:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities((string)$item->ItemInfo->MediaType));

        $xhmod->close(); // tr

    }

    if (!empty($barcode)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Barcode:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', displayBarcode($barcode));

        $xhmod->close(); // tr

    }

    if (!empty($label)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Label:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities($label));

        $xhmod->close(); // tr

    }

    if (!empty($languages)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Languages:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities(join(", ", $languages)));

        $xhmod->close(); // tr

    }

    if (!empty($item->ItemInfo->ContentInfo->PublicationDate)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Publication Date:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities((string)$item->ItemInfo->ContentInfo->PublicationDate->DisplayValue));

        $xhmod->close(); // tr

    }

    if (!empty($item->ItemInfo->ContentInfo->ReleaseDate)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Release Date:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities((string)$item->ItemInfo->ContentInfo->ReleaseDate->DisplayValue));

        $xhmod->close(); // tr

    }

    if (!empty($genres)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Genre:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities(join(", ", $genres)));

        $xhmod->close(); // tr

    }

    if (!empty($item->ItemInfo->ContentInfo->UnitCount->DisplayValue)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Number of Discs:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities((string)$item->ItemInfo->ContentInfo->UnitCount->DisplayValue));

        $xhmod->close(); // tr

    }

    if (!empty($item->ItemInfo->ContentInfo->PagesCount->DisplayValue)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Number of Pages:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities((string)$item->ItemInfo->ContentInfo->PagesCount->DisplayValue));

        $xhmod->close(); // tr

    }

    if (!empty($item->ItemInfo->RunningTime)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Running Time:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities($runningTime));

        $xhmod->close(); // tr

    }

    if (!empty($item->ItemInfo->Edition)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Edition:");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', htmlentities((string)$item->ItemInfo->Edition));

        $xhmod->close(); // tr

    }

    if (!empty($item->Tracks)) {

        $xhmod->tag('tr');

        $xhmod->add_attribute("colspan", "2");

        $xhmod->add_attribute("class", "px-1");

        $xhmod->tag('td', "Tracks:");

        $xhmod->close(); // tr

        $xhmod->tag('tr');

        $xhmod->add_attribute("colspan", "2");

        $xhmod->tag('td');

        $xhmod->add_attribute("class", "pl-3 pt-0 small list-unstyled");

        $xhmod->tag('ul');

        foreach ($item->Tracks->Disc as $disc) {

            if ((int)$item->ItemInfo->ContentInfo->UnitCount->DisplayValue > 1 && !empty($disc->attributes())) {

                $xhmod->add_attribute("class", "font-weight-bold");

                $xhmod->tag('li', "Disc " . $disc->attributes() . ":");

            }

            foreach($disc->Track as $track) {

                $xhmod->tag('li', (!empty($track->attributes()) ? $track->attributes() . ") " : "") . htmlentities($track));

            }

        }

        $xhmod->close(); // ul

        $xhmod->close(); // td

        $xhmod->close(); // tr

    }

    $xhmod->close(); // table

    $xhmod->close(); // div

    $xhmod->add_attribute("class", "modal-footer bg-secondary justify-content-between");

    $xhmod->tag('div');

    $xhmod->add_attribute("class", "float-right");

    $xhmod->tag('span');

    $xhmod->add_attribute("type", "button");

    $xhmod->add_attribute("class", "btn btn-danger");

    $xhmod->add_attribute("data-dismiss", "modal");

    $xhmod->tag('button', "Close");

    $xhmod->close(); // span

    $xhmod->close(); // div

    $xhmod->close(); // div

    $xhmod->close(); // div

    $xhmod->close(); // div

    $html = $xhmod->flush();

    //error_log(print_r($html, 1));

    $xh->insert_code($html);

    $xh->close(); // div

    return;

}

function getArtists($item) {

    $artists = [];

    if (!empty($item->ItemInfo->Artist)){

        $artists[] = $item->ItemInfo->Artist;

    } else if (!empty($item->ItemInfo->ByLineInfo->Contributors)) {

        foreach ($item->ItemInfo->ByLineInfo->Contributors as $artist) {

            if ((string)$artist->Role == "Artist") {

                $artists[] = $artist->Name;

            }

        }

    }

    return $artists;

}

function getContributers($item) {

    $contributers = [];

    if (!empty($item->ItemInfo->ByLineInfo->Contributors)) {

        foreach ($item->ItemInfo->ByLineInfo->Contributors as $creator) {

            if ((string)$creator->Role == "Primary Contributor") {

                $contributers[] = $creator->Name;

            }

            else {

                $contributers[] = $creator->Name . " (" . $creator->Role . ")";

            }

        }

    }

    return $contributers;

}

class AwsV4 {

    private $accessKey = null;

    private $secretKey = null;

    private $path = null;

    private $regionName = null;

    private $serviceName = null;

    private $httpMethodName = null;

    private $queryParametes = array();

    private $awsHeaders = array();

    private $payload = "";

    private $HMACAlgorithm = "AWS4-HMAC-SHA256";

    private $aws4Request = "aws4_request";

    private $strSignedHeader = null;

    private $xAmzDate = null;

    private $currentDate = null;

    public function __construct($accessKey, $secretKey) {

        $this->accessKey = $accessKey;

        $this->secretKey = $secretKey;

        $this->xAmzDate = $this->getTimeStamp();

        $this->currentDate = $this->getDate();

    }

    function setPath($path) {

        $this->path = $path;

    }

    function setServiceName($serviceName) {

        $this->serviceName = $serviceName;

    }

    function setRegionName($regionName) {

        $this->regionName = $regionName;

    }

    function setPayload($payload) {

        $this->payload = $payload;

    }

    function setRequestMethod($method) {

        $this->httpMethodName = $method;

    }

    function addHeader($headerName, $headerValue) {

        $this->awsHeaders[$headerName] = $headerValue;

    }

    private function prepareCanonicalRequest() {

        $canonicalURL = "";

        $canonicalURL .= $this->httpMethodName . "\n";

        $canonicalURL .= $this->path . "\n" . "\n";

        $signedHeaders = '';

        foreach ($this->awsHeaders as $key => $value) {

            $signedHeaders .= $key . ";";

            $canonicalURL .= $key . ":" . $value . "\n";

        }

        $canonicalURL .= "\n";

        $this->strSignedHeader = substr($signedHeaders, 0, -1);

        $canonicalURL .= $this->strSignedHeader . "\n";

        $canonicalURL .= $this->generateHex($this->payload);

        return $canonicalURL;

    }

    private function prepareStringToSign($canonicalURL) {

        $stringToSign = '';

        $stringToSign .= $this->HMACAlgorithm . "\n";

        $stringToSign .= $this->xAmzDate . "\n";

        $stringToSign .= $this->currentDate . "/" . $this->regionName . "/" . $this->serviceName . "/" . $this->aws4Request . "\n";

        $stringToSign .= $this->generateHex($canonicalURL);

        return $stringToSign;

    }

    private function calculateSignature($stringToSign) {

        $signatureKey = $this->getSignatureKey($this->secretKey, $this->currentDate, $this->regionName, $this->serviceName);

        $signature = hash_hmac("sha256", $stringToSign, $signatureKey, true);

        $strHexSignature = strtolower(bin2hex($signature));

        return $strHexSignature;

    }

    public function getHeaders() {

        $this->awsHeaders['x-amz-date'] = $this->xAmzDate;

        ksort($this->awsHeaders);

        // Step 1: CREATE A CANONICAL REQUEST

        $canonicalURL = $this->prepareCanonicalRequest();

        // Step 2: CREATE THE STRING TO SIGN

        $stringToSign = $this->prepareStringToSign($canonicalURL);

        // Step 3: CALCULATE THE SIGNATURE

        $signature = $this->calculateSignature($stringToSign);

        // Step 4: CALCULATE AUTHORIZATION HEADER

        if ($signature) {

            $this->awsHeaders['Authorization'] = $this->buildAuthorizationString($signature);

            return $this->awsHeaders;

        }

    }

    private function buildAuthorizationString($strSignature) {

        return $this->HMACAlgorithm . " " . "Credential=" . $this->accessKey . "/" . $this->getDate() . "/" . $this->regionName . "/" . $this->serviceName . "/" . $this->aws4Request . "," . "SignedHeaders=" . $this->strSignedHeader . "," . "Signature=" . $strSignature;

    }

    private function generateHex($data) {

        return strtolower(bin2hex(hash("sha256", $data, true)));

    }

    private function getSignatureKey($key, $date, $regionName, $serviceName) {

        $kSecret = "AWS4" . $key;

        $kDate = hash_hmac("sha256", $date, $kSecret, true);

        $kRegion = hash_hmac("sha256", $regionName, $kDate, true);

        $kService = hash_hmac("sha256", $serviceName, $kRegion, true);

        $kSigning = hash_hmac("sha256", $this->aws4Request, $kService, true);

        return $kSigning;

    }

    private function getTimeStamp() {

        return gmdate("Ymd\THis\Z");

    }

    private function getDate() {

        return gmdate("Ymd");

    }

}