public static function getUrl(array $prices)
{
global $tag, $marketplaceSingleCart;
if (!$marketplaceSingleCart && count($prices) == 1) {
return "http://www.amazon.com/gp/offer-listing/" . Isbn::to10(current($prices)->bookId) . "/condition=all&tag={$tag}";
} else {
return Amazon::getUrl($prices);
}
}
public function testValidateAndConvertIsbn13Only()
{
$this->assertTrue(Isbn::validate($this->validIsbn13Only));
$this->assertFalse(Isbn::to10($this->validIsbn13Only));
}
/**
* Makes an Amazon cart. Requires $tag global to be set.
*
* todo: fail gracefully if amazon cart api goes down (it did once).
*
* @return string the url of an Amazon cart containing the items referred to in $ids
*/
public static function getCartUrl(array $isbns, array $offerListingIds = array())
{
global $tag;
$items = array();
foreach ($isbns as $isbn) {
$items[] = array('type' => 'ASIN', 'id' => Isbn::to10($isbn));
}
foreach ($offerListingIds as $id) {
$items[] = array('type' => 'OfferListingId', 'id' => $id);
}
$amazon = new AmazonAPI();
$data = array("AssociateTag" => $tag);
$i = 1;
$j = 1;
$cartId = null;
while ($j <= count($items)) {
if ($cartId) {
$data["CartId"] = $cartId;
$data["HMAC"] = $hmac;
}
$data["Item.{$i}.{$items[$j - 1]['type']}"] = $items[$j - 1]['id'];
$data["Item.{$i}.Quantity"] = "1";
if ($i % 6 == 0 || $j == count($items)) {
$operation = $cartId ? "CartAdd" : "CartCreate";
$result = $amazon->request($operation, $data);
$cartId = (string) $result->Cart->CartId;
$hmac = (string) $result->Cart->HMAC;
$i = 0;
$data = array("AssociateTag" => $tag);
}
$i++;
$j++;
}
return $result->Cart->PurchaseURL;
}
