C:/xampp/htdocs/moodle/lib/zend/Zend/Service/Amazon/Query.php

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<?php

require_once 'Zend/Service/Amazon.php';


class Zend_Service_Amazon_Query extends Zend_Service_Amazon
{
    protected $_search = array();

    protected $_searchIndex = null;

    public function __call($method, $args)
    {
        if (strtolower($method) === 'asin') {
            $this->_searchIndex = 'asin';
            $this->_search['ItemId'] = $args[0];
            return $this;
        }

        if (strtolower($method) === 'category') {
            $this->_searchIndex = $args[0];
            $this->_search['SearchIndex'] = $args[0];
        } else if (isset($this->_search['SearchIndex']) || $this->_searchIndex !== null || $this->_searchIndex === 'asin') {
            $this->_search[$method] = $args[0];
        } else {
            require_once 'Zend/Service/Exception.php';
            throw new Zend_Service_Exception('You must set a category before setting the search parameters');
        }

        return $this;
    }

    public function search()
    {
        if ($this->_searchIndex === 'asin') {
            return $this->itemLookup($this->_search['ItemId'], $this->_search);
        }
        return $this->itemSearch($this->_search);
    }
}