protected function getHoldings($arrIDs)
{
$items = new Xerxes_Record_Items();
$cache_id = "";
// id used in cache
$bib_id = "";
// bibliographic id number
$oclc = "";
// oclc number
// figure out what is what
foreach ($arrIDs as $id) {
if (stristr($id, "ISBN:")) {
continue;
}
if (stristr($id, "OCLC:")) {
$oclc = $id;
} else {
$bib_id = $id;
}
}
// no bib id supplied, so use oclc number as id
if ($bib_id == "") {
if ($oclc == "") {
throw new Exception("no bibliographic id or oclc number suppled in availability lookup");
}
$cache_id = str_replace("OCLC:", "", $oclc);
} else {
$cache_id = $bib_id;
}
// get url to availability server
$strSource = $this->getSource();
$url = $this->getHoldingsURL($strSource);
// no holdings source defined or somehow id's are blank
if ($url == null || count($arrIDs) == 0) {
return $items;
// empty items
}
// get the data
$url .= "?action=status&id=" . urlencode(implode(" ", $arrIDs));
$data = Xerxes_Framework_Parser::request($url);
// echo $url; exit;
// no data, what's up with that?
if ($data == "") {
throw new Exception("could not connect to availability server");
}
// echo $data; exit;
// response is (currently) an array of json objects
$arrResults = json_decode($data);
// parse the response
if (is_array($arrResults)) {
if (count($arrResults) > 0) {
// now just slot them into our item object
foreach ($arrResults as $holding) {
$is_holdings = property_exists($holding, "holding");
if ($is_holdings == true) {
$item = new Xerxes_Record_Holding();
} else {
$item = new Xerxes_Record_Item();
}
foreach ($holding as $property => $value) {
$item->setProperty($property, $value);
}
$items->addItem($item);
}
}
}
// cache it for the future
// expiry set for two hours
$expiry = $this->config->getConfig("HOLDINGS_CACHE_EXPIRY", false, 2 * 60 * 60);
$expiry += time();
$cache = new Xerxes_Data_Cache();
$cache->source = $this->getSource();
$cache->id = $cache_id;
$cache->expiry = $expiry;
$cache->data = serialize($items);
$this->data_map->setCache($cache);
return $items;
}