public function getHitCount($aim25sid, $query)
{
$hits = array();
if (!is_null($aim25sid)) {
// should have hits stored away - no need to rerun
$hits['hits'] = $this->cache()->get('hits_' . $aim25sid);
$hits['url'] = $this->cache()->get('url_' . $aim25sid);
$hits['session'] = $this->cache()->get('sid_' . $aim25sid);
} else {
$params = $query->getAllSearchParams();
// the aim25 web search doesn't do Z39.50, so we need
// to approximate as best we can
if ($params['field'] == 'keyword' || $params['field'] == 'title' || $params['field'] == 'author') {
$querystring = 'zany2?term1=' . urlencode($params['query']);
} else {
if ($params['field'] == 'subject') {
$querystring = 'zub2?term1=' . urlencode($params['query']);
} else {
// we don't handle isbn etc
$hits['hits'] = 0;
return $hits;
}
}
$url = $this->conf()->getConfig('AIM25_HTTPURL', false);
$url .= $querystring;
$hits['url'] = $url;
// initialize without calling initializePazpar2Client()
// as we don't want this client to overwrite the cached one
$client = new Pazpar2($this->conf()->getConfig('url', true), false, null, $this->client);
$aim25sid = $client->getSessionId();
$hits['session'] = $aim25sid;
// blocking (synchronous) call to pz2 search
$zurl = $this->conf()->getConfig('AIM25_ZURL', false);
$res = $client->search($query->toQuery(), array($zurl), null, null, true);
$hits['hits'] = $res[$zurl]['records'];
// cache so we don't need to rerun next time
$this->cache()->set('hits_' . $aim25sid, $hits['hits']);
$this->cache()->set('url_' . $aim25sid, $hits['url']);
$this->cache()->set('sid_' . $aim25sid, $hits['session']);
}
return $hits;
}
/**
* Initialize a pazpar2 client, save to cache, and return id for retrieval
*
*/
public function initializePazpar2Client()
{
$client = new Pazpar2($this->conf()->getConfig('url', true), false, null, $this->client);
$this->cache()->set($client->getSessionId(), serialize($client));
$this->client = $client;
return $this->client->getSessionId();
}