81 lines
2.4 KiB
JavaScript
81 lines
2.4 KiB
JavaScript
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var Metadata = (function MetadataClosure() {
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function Metadata(meta) {
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if (typeof meta === 'string') {
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var parser = new DOMParser();
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meta = parser.parseFromString(meta, 'application/xml');
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} else if (!(meta instanceof Document)) {
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error('Metadata: Invalid metadata object');
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}
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this.metaDocument = meta;
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this.metadata = {};
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this.parse();
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}
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Metadata.prototype = {
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parse: function() {
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var doc = this.metaDocument;
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var rdf = doc.documentElement;
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if (rdf.tagName.toLowerCase() !== 'rdf:rdf') { // Wrapped in <xmpmeta>
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rdf = rdf.firstChild;
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while (rdf.nodeName && rdf.nodeName.toLowerCase() !== 'rdf:rdf') {
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rdf = rdf.nextSibling;
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}
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}
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if (rdf.nodeName.toLowerCase() !== 'rdf:rdf' || !rdf.hasChildNodes()) {
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return;
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}
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var childNodes = rdf.childNodes, desc, namespace, entries, entry;
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for (var i = 0, length = childNodes.length; i < length; i++) {
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desc = childNodes[i];
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if (desc.nodeName.toLowerCase() !== 'rdf:description') {
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continue;
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}
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entries = [];
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for (var ii = 0, iLength = desc.childNodes.length; ii < iLength; ii++) {
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if (desc.childNodes[ii].nodeName.toLowerCase() !== '#text') {
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entries.push(desc.childNodes[ii]);
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}
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}
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for (ii = 0, iLength = entries.length; ii < iLength; ii++) {
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var entry = entries[ii];
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var name = entry.nodeName.toLowerCase();
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var entryName = name.split(':');
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entryName = (entryName.length > 1) ? entryName[1] : entryName[0];
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switch (name) {
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case 'pdf:moddate':
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case 'xap:createdate':
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case 'xap:metadatadate':
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case 'xap:modifydate':
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this.metadata[entryName] = new Date(entry.textContent.trim());
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break;
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default:
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// For almost all entries we just add them to the metadata object
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if (this.metadata[entryName]) {
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this.metadata[name] = entry.textContent.trim();
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} else {
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this.metadata[entryName] = entry.textContent.trim();
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}
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break;
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}
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}
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}
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},
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get: function(name) {
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return this.metadata[name] || null;
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},
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has: function(name) {
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return typeof this.metadata[name] !== 'undefined';
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}
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};
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return Metadata;
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})();
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