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70 lines
1.8 KiB
70 lines
1.8 KiB
14 years ago
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<?php
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// $Id$
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/*
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* @file tagging.inc
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*/
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/**
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* Description of tagging
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*
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* @author aoneill
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*/
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class TagSet {
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public $tags = array();
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public $item = NULL;
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public $tagsDSID = 'TAGS';
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function TagSet($item = NULL) {
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if (!empty($item) && get_class($item) == 'Fedora_Item') {
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$this->item = $item;
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$this->load();
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}
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}
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function load() {
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$tagsxml = isset($this->item->datastreams[$this->tagsDSID])? $this->item->get_datastream_dissemination($this->tagsDSID) : NULL;
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if (empty($tagsxml)) {
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$this->tags = array();
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return FALSE;
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}
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$tagsdoc = new DOMDocument();
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$tagsdoc->loadXML($tagsxml);
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$tags = $tagsdoc->getElementsByTagName('tag');
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foreach ($tags as $tag) {
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$this->tags[] = array(
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'name' => $tag->nodeValue,
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'creator' => $tag->getAttribute('creator')
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);
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}
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}
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/**
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* Saves an associative array of tags to a datastream.
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*/
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function save() {
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$tagdoc = new DomDocument();
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$e_tags = new DomElement('tags');
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$tagdoc->appendChild($e_tags);
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foreach ($this->tags as $tag) {
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$e_tag = $tagdoc->createElement('tag', $tag['name']);
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$e_tag->setAttribute('creator', (!empty($tag['creator'])) ? $tag['creator'] : '');
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$e_tags->appendChild($e_tag);
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}
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try {
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$datastreams = $this->item->get_datastreams_list_as_array();
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if (empty($datastreams[$this->tagsDSID])) {
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$this->item->add_datastream_from_string($tagdoc->saveXML(), $this->tagsDSID, 'Tags', 'text/xml', 'X');
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}
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else {
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$this->item->modify_datastream_by_value($tagdoc->saveXML(), $this->tagsDSID, 'Tags', 'text/xml', 'X');
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}
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}
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catch (exception $e) {
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drupal_set_message('There was an error saving the tags datastream: !e', array('!e' => $e), 'error');
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return FALSE;
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}
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return TRUE;
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}
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}
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