/**
* Constructor
*
*/
public function __construct()
{
// full set of Subjects from configuration file
$this->config = Config::getInstance();
$config = $this->config->getConfig("targets");
if ($config != null) {
$subj_assoc = array();
$subj_urls = array();
$key = 'pz2_key';
foreach ($config->target as $target_data) {
$t = (string) $target_data->attributes()->{$key};
if (!array_key_exists($t, $this->targets_to_subjects)) {
$this->targets_to_subjects[$t] = array();
}
// now pick up all the subjects for this target
$subjects = $target_data->children();
$id = 'id';
foreach ($subjects as $s) {
if ($s->getName() == 'subject') {
$subj = (string) $s;
$subj_id = (string) $s->attributes()->{$id};
$subj_url = (string) $s->attributes()->url;
$subj_urls[$subj] = $subj_url;
$subj_assoc[$subj] = $subj_id;
if (!array_key_exists($subj_id, $this->subjects_to_targets)) {
$this->subjects_to_targets[$subj_id] = array();
}
$this->targets_to_subjects[$t][] = $subj_id;
$this->subjects_to_targets[$subj_id][] = $t;
}
}
}
$this->subjectnames = array_keys($subj_assoc);
foreach ($this->subjectnames as $sn) {
$subject = new Subject();
$subject->load(array('name' => $sn, 'id' => $subj_assoc[$sn], 'position' => $subj_assoc[$sn], 'url' => $subj_urls[$sn]));
$this->subjects[] = $subject;
}
}
}
/**
* Fetch all subjects relative to a target specified
* by its pazpar2 key (from the pazpar2 configuration files
*
* @param string $pz2_key Identifier for a pazpar2 z39.50 target
* @returns array of Subjects
*/
public function getSubjectsByTarget($pz2_key)
{
$arrSubjects = array();
$command = "/institutions/{$pz2_key}/subjects.json";
$this->client->setUri($this->url . $command);
$api_subjects = $this->client->send()->getBody();
$api_subjects = json_decode($api_subjects, true);
$api_subjects = array_pop($api_subjects);
foreach ($api_subjects as $sub) {
$subject = new Subject();
$subject->load(array('name' => $sub['subject'], 'id' => $sub['subject_id'], 'position' => $sub['subject'], 'url' => $sub['ukat_url']));
$subjArray[] = $subject;
}
usort($subjArray, array($this, 'alphasort'));
return $subjArray;
}