cordova-pebble
Version:
Allows communication with Pebble smartwatch applications and Cordova applications.
171 lines (145 loc) • 4.18 kB
JavaScript
/**
* Module dependencies.
*/
var DOMParser = require('xmldom').DOMParser;
/**
* Module exports.
*/
exports.parse = parse;
/**
* We ignore raw text (usually whitespace), <!-- xml comments -->,
* and raw CDATA nodes.
*
* @param {Element} node
* @returns {Boolean}
* @api private
*/
function shouldIgnoreNode (node) {
return node.nodeType === 3 // text
|| node.nodeType === 8 // comment
|| node.nodeType === 4; // cdata
}
/**
* Check if the node is empty. Some plist file has such node:
* <key />
* this node shoud be ignored.
*
* @see https://github.com/TooTallNate/plist.js/issues/66
* @param {Element} node
* @returns {Boolean}
* @api private
*/
function isEmptyNode(node){
if(!node.childNodes || node.childNodes.length === 0) {
return true;
} else {
return false;
}
}
/**
* Parses a Plist XML string. Returns an Object.
*
* @param {String} xml - the XML String to decode
* @returns {Mixed} the decoded value from the Plist XML
* @api public
*/
function parse (xml) {
var doc = new DOMParser().parseFromString(xml);
if (doc.documentElement.nodeName !== 'plist') {
throw new Error('malformed document. First element should be <plist>');
}
var plist = parsePlistXML(doc.documentElement);
// the root <plist> node gets interpreted as an Array,
// so pull out the inner data first
if (plist.length == 1) plist = plist[0];
return plist;
}
/**
* Convert an XML based plist document into a JSON representation.
*
* @param {Object} xml_node - current XML node in the plist
* @returns {Mixed} built up JSON object
* @api private
*/
function parsePlistXML (node) {
var i, new_obj, key, val, new_arr, res, d;
if (!node)
return null;
if (node.nodeName === 'plist') {
new_arr = [];
for (i=0; i < node.childNodes.length; i++) {
// ignore comment nodes (text)
if (!shouldIgnoreNode(node.childNodes[i])) {
new_arr.push( parsePlistXML(node.childNodes[i]));
}
}
return new_arr;
} else if (node.nodeName === 'dict') {
new_obj = {};
key = null;
for (i=0; i < node.childNodes.length; i++) {
// ignore comment nodes (text)
if (!shouldIgnoreNode(node.childNodes[i])) {
if (key === null) {
key = parsePlistXML(node.childNodes[i]);
} else {
new_obj[key] = parsePlistXML(node.childNodes[i]);
key = null;
}
}
}
return new_obj;
} else if (node.nodeName === 'array') {
new_arr = [];
for (i=0; i < node.childNodes.length; i++) {
// ignore comment nodes (text)
if (!shouldIgnoreNode(node.childNodes[i])) {
res = parsePlistXML(node.childNodes[i]);
if (null != res) new_arr.push(res);
}
}
return new_arr;
} else if (node.nodeName === '#text') {
// TODO: what should we do with text types? (CDATA sections)
} else if (node.nodeName === 'key') {
if(isEmptyNode(node)) return null;
res = '';
if(node.childNodes[0]) {
res = node.childNodes[0].nodeValue;
}
return res;
} else if (node.nodeName === 'string') {
res = '';
if(isEmptyNode(node)) return null;
for (d=0; d < node.childNodes.length; d++) {
res += node.childNodes[d].nodeValue;
}
return res;
} else if (node.nodeName === 'integer') {
// parse as base 10 integer
return parseInt(node.childNodes[0].nodeValue, 10);
} else if (node.nodeName === 'real') {
res = '';
for (d=0; d < node.childNodes.length; d++) {
if (node.childNodes[d].nodeType === 3) {
res += node.childNodes[d].nodeValue;
}
}
return parseFloat(res);
} else if (node.nodeName === 'data') {
res = '';
for (d=0; d < node.childNodes.length; d++) {
if (node.childNodes[d].nodeType === 3) {
res += node.childNodes[d].nodeValue.replace(/\s+/g, '');
}
}
// decode base64 data to a Buffer instance
return new Buffer(res, 'base64');
} else if (node.nodeName === 'date') {
return new Date(node.childNodes[0].nodeValue);
} else if (node.nodeName === 'true') {
return true;
} else if (node.nodeName === 'false') {
return false;
}
}