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var sanitizer = require('./sanitize.js')

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module.exports = function (json, options) {

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if (json instanceof Buffer) { json = json.toString(); } var obj = null; if (typeof(json) == 'string') { try { obj = JSON.parse(json); } catch(e) { throw new Error("The JSON structure is invalid"); } } else { obj = json; }

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var toXml = new ToXml(options);

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toXml.parse(obj); return toXml.xml; }

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ToXml.prototype.parse = function(obj) {

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if (!obj) return;

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var self = this;

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var keys = Object.keys(obj); var len = keys.length;

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// First pass, extract strings only for (var i = 0; i < len; i++) {

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var key = keys[i], value = obj[key], isArray = Array.isArray(value);

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var type = typeof(value); if (type == 'string' || type == 'number' || type == 'boolean' || isArray) {

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var it = isArray ? value : [value];

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it.forEach(function(subVal) { if (typeof(subVal) != 'object') { if (key == '$t') {

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self.addTextContent(subVal);

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} else {

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self.addAttr(key, subVal);

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} }

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});

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} } // Second path, now handle sub-objects and arrays

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for (var i = 0; i < len; i++) { var key = keys[i]; if (Array.isArray(obj[key])) { var elems = obj[key]; var l = elems.length; for (var j = 0; j < l; j++) {

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var elem = elems[j];

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if (typeof(elem) == 'object') {

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self.openTag(key); self.parse(elem); self.closeTag(key);

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}

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}

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} else if (typeof(obj[key]) == 'object' && !(self.options.ignoreNull && obj[key] === null)) {

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self.openTag(key); self.parse(obj[key]); self.closeTag(key);

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} } };

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ToXml.prototype.openTag = function(key) { this.completeTag(); this.xml += '<' + key; this.tagIncomplete = true; } ToXml.prototype.addAttr = function(key, val) {

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if (this.options.sanitize) {

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val = sanitizer.sanitize(val, false, true);

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}

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this.xml += ' ' + key + '="' + val + '"'; } ToXml.prototype.addTextContent = function(text) { this.completeTag();

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var newText = (this.options.sanitize ? sanitizer.sanitize(text) : text); this.xml += newText;

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} ToXml.prototype.closeTag = function(key) { this.completeTag(); this.xml += '</' + key + '>'; } ToXml.prototype.completeTag = function() { if (this.tagIncomplete) { this.xml += '>'; this.tagIncomplete = false; } }

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function ToXml(options) { var defaultOpts = {

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sanitize: false, ignoreNull: false

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};

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if (options) { for (var opt in options) { defaultOpts[opt] = options[opt]; } }

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this.options = defaultOpts;

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this.xml = ''; this.tagIncomplete = false; }