xml-lite/lib/dom2js.js

maintaining xml in pure javascript (IN BOTH NODE.JS & BROWSERS)

'use strict';
/**
 * dom2js module
 * @module dom2js
 * @see module:index
 */
const lang = require('zero-lang');
const sanitize = require('./sanitize');

function unescapeQuotes(value) {
  return value
    .replace(/"/g, '"')
    .replace(/'/g, "'");
}

function filterNodes(nodes) {
  // FIXME the browser version does not deal with ProcessingInstruction of <?xml version="1.0" encoding="UTF-8"?>
  nodes = nodes || [];
  return lang.filter(nodes, (node) => !(node.nodeType === 7 && node.target === 'xml'));
}

function dom2js(doc) {
  const obj = {
    // NOTICE: for HTML, tagName is always UPPERCASE.
    type: doc.nodeType,
  };

  // special types
  if (obj.type === 8) {
    /* doc.COMMENT_NODE */
    obj.data = doc.data;
  }
  if (obj.type === 3) {
    /* doc.TEXT_NODE */
    obj.text = sanitize(doc.textContent);
  }
  if (obj.type === 7) {
    /* doc.PROCESSING_INSTRUCTION_NODE */
    obj.tag = doc.target; // FIXME in browser version, it has tagName
    obj.data = doc.data;
  }

  // extra properties
  if (doc.tagName) obj.tag = doc.tagName;
  if (doc.childNodes && doc.childNodes.length) {
    obj.children = lang.map(filterNodes(doc.childNodes), (child) => dom2js(child));
  }
  if (doc.attributes) {
    obj.attributes = {};
    lang.each(doc.attributes || [], (attr) => {
      const name = attr.name;
      obj.attributes[name] = unescapeQuotes(doc.getAttribute(name));
    });
  }
  return obj;
}

module.exports = dom2js;