PHP and MySQL Web Development - P159 pps

function products { return $this->_products; } function totalResults { return $this->_totalResults; } function getProduct$i { ifisset$this->_products[$i] return $this->_products[$i] ; el

var $_browseNode;

var $_ASIN;

var $_page;

var $_mode;

var $_url;

var $_type;

var $_totalResults;

var $_currentProduct = null;

var $_products = array(); // array of Product objects var $_names = array();

// array of names of the XML nodes we have entered.

// treated as a stack Only used during parsing.

function products() {

return $this->_products;

}

function totalResults() {

return $this->_totalResults;

}

function getProduct($i) {

if(isset($this->_products[$i])) return $this->_products[$i] ; else

return false;

}

// Perform a query to get a page full of products from a browse node // Switch between XML/HTTP and SOAP in constants.php

// Returns an array of Products function browseNodeSearch($browseNode, $page, $mode) {

if(METHOD=='SOAP') {

// the NuSOAP class generates a lot of notices Turn them off error_reporting(error_reporting() & ~E_NOTICE);

$soapclient = new soapclient(

'http://soap.amazon.com/schemas2/AmazonWebServices.wsdl', 'wsdl');

$soap_proxy = $soapclient->getProxy();

Listing 31.8 Continued

$parameters['page']=$page;

$parameters['type']='heavy';

$parameters['tag']=$this->_assocID;

$parameters['devtag']=$this->_devTag;

$parameters['sort']='+salesrank';

$parameters['browse_node'] = $browseNode;

// perform actual soap query

$result = $soap_proxy->BrowseNodeSearchRequest($parameters);

if(isSOAPError($result)) return false;

$this->_totalResults = $result['TotalResults'];

$counter = 0;

foreach($result['Details'] as $product) {

$this->_products[$counter] = new Product;

$this->_products[$counter]->soap = $result['Details'][$counter];

$counter++;

} unset($soapclient);

unset($soap_proxy);

} else {

// form URL and call parseXML to download and parse it

$this->_type = 'browse';

$this->_browseNode = $browseNode;

$this->_page = $page;

$this->_mode = $mode;

$this->_url = 'http://xml.amazon.com/onca/xml2?t='.ASSOCIATEID

.'&dev-t='.DEVTAG.'&BrowseNodeSearch=' $this->_browseNode.'&mode='.$this->_mode '&type=heavy&page='.$this->_page.'&sort=+salesrank&f=xml';

$this->parseXML();

}

return $this->_products;

}

// Given an ASIN, get the URL of the large image // Returns a string

function getImageUrlLarge($ASIN, $mode) {

if( $this->_products[0]->imageURLLarge()) Listing 31.8 Continued

$this->ASINSearch($ASIN, $mode);

return $this->_products[0]->imageURLLarge();

}

// Perform a query to get a products with specified ASIN // Switch between XML/HTTP and SOAP in constants.php // Returns a Products object

function ASINSearch($ASIN, $mode = 'books') {

$this->_type = 'ASIN';

$this->_ASIN=$ASIN;

$this->_mode = $mode;

$ASIN = padASIN($ASIN);

if(METHOD=='SOAP') {

error_reporting(E_ALL & ~E_NOTICE);

$soapclient = new soapclient ( 'http://soap.amazon.com/schemas2/AmazonWebServices.wsdl', 'wsdl') ;

$soap_proxy = $soapclient->getProxy();

$parameters['asin']=$ASIN;

$parameters['mode']=$mode;

$parameters['type']="heavy";

$parameters['tag']=$this->_assocID;

$parameters['devtag']=$this->_devTag;

$result = $soap_proxy->AsinSearchRequest($parameters);

if(isSOAPError($result)) {

print_r($result);

return false;

}

$this->_products[0] = new Product;

$this->_products[0]->soap = $result['Details'][0];

$this->_totalResults=1;

unset($soapclient);

unset($soap_proxy);

} else { // form URL and call parseXML to download and parse it

$this->_url = 'http://xml.amazon.com/onca/xml2?t='.ASSOCIATEID

.'&dev-t='.DEVTAG.'&AsinSearch=' Listing 31.8 Continued

$this->parseXML();

} return $this->_products[0];

}

// Perform a query to get a page full of products with a keyword search // Switch between XML/HTTP and SOAP in index.php

// Returns an array of Products function keywordSearch($search, $page, $mode = 'books') {

if(METHOD=='SOAP') {

error_reporting(E_ALL & ~E_NOTICE);

$soapclient = new soapclient(

'http://soap.amazon.com/schemas2/AmazonWebServices.wsdl','wsdl');

$soap_proxy = $soapclient->getProxy();

$parameters['mode']=$mode;

$parameters['page']=$page;

$parameters['type']="heavy";

$parameters['tag']=$this->_assocID;

$parameters['devtag']=$this->_devTag;

$parameters['sort']='+salesrank';

$parameters['keyword'] = $search;

// perform actual soap request

$result = $soap_proxy->KeywordSearchRequest($parameters);

if(isSOAPError($result) ) return false;

$counter = 0;

foreach($result['Details'] as $product) {

$this->_products[$counter] = new Product;

$this->_products[$counter]->soap = $result['Details'][$counter];

$counter++;

}

$this->_totalResults = $result['TotalResults'] ; unset($soapclient);

unset($soap_proxy);

} else {

$this->_type = 'search';

$this->_search=$search;

Listing 31.8 Continued

$search = urlencode($search);

$this->_mode = $mode;

$this->_url = 'http://xml.amazon.com/onca/xml2?t='.ASSOCIATEID

.'&dev-t='.DEVTAG.'&KeywordSearch=' $search.'&mode='.$this->_mode '&type=heavy&page='

.$this->_page '&sort=+salesrank&f=xml';

$this->parseXML();

} return $this->_products;

}

// Parse the XML into Product object(s) function parseXML()

{

$xml_parser = xml_parser_create();

xml_parser_set_option($xml_parser,XML_OPTION_SKIP_WHITE,1);

xml_set_object($xml_parser, $this);

xml_set_element_handler($xml_parser,

"startElementHandler",

"endElementHandler");

xml_set_character_data_handler($xml_parser, 'cdataHandler');

if (!($fp = fopen($this->_url, "r"))) {

die("could not open XML input");

} while ($data = fread($fp, 4096)) {

if (!xml_parse($xml_parser, $data, feof($fp))) {

die(sprintf("XML error: %s at line %d",

xml_error_string(xml_get_error_code($xml_parser)), xml_get_current_line_number($xml_parser)));

} } xml_parser_free($xml_parser) ; }

// function to catch callbacks when the XML parser reaches the start // of a new element

function startElementHandler($parser, $name, $attributes) {

Listing 31.8 Continued