parse-open-graph/dist/openGraph.js

Open Graph parser for browser

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

function _extends() {
  _extends = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };

  return _extends.apply(this, arguments);
}

function parseMetaFromDocument() {
  var elems = document.querySelectorAll('meta[property]');
  var result = [];

  for (var _iterator = elems, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
    var _ref;

    if (_isArray) {
      if (_i >= _iterator.length) break;
      _ref = _iterator[_i++];
    } else {
      _i = _iterator.next();
      if (_i.done) break;
      _ref = _i.value;
    }

    var el = _ref;
    result.push({
      property: el.getAttribute('property'),
      content: el.content
    });
  }

  return result;
}
function parseFromDocument(options) {
  return parse(parseMetaFromDocument(), options);
}
function parse(meta, _temp) {
  var _ref2 = _temp === void 0 ? {} : _temp,
      _ref2$alias = _ref2.alias,
      alias = _ref2$alias === void 0 ? {} : _ref2$alias,
      _ref2$arrays = _ref2.arrays,
      arrays = _ref2$arrays === void 0 ? [] : _ref2$arrays;

  alias = _extends({
    'og:locale': 'og:locale:_',
    'og:image': 'og:image:url',
    'og:video': 'og:video:url',
    'og:audio': 'og:audio:url',
    'music:album': 'music:album:url',
    'music:song': 'music:song:url',
    'video:actor': 'video:actor:url'
  }, alias);
  arrays = ['og:image', 'og:video', 'og:audio', 'music:album', 'music:song', 'video:actor', 'og:locale:alternate', 'music:musician', 'music:creator', 'video:director', 'video:writer', 'video:tag', 'article:author', 'article:tag', 'book:author', 'book:tag'].concat(arrays);
  var result = {};

  for (var _iterator2 = meta, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) {
    var _ref3;

    if (_isArray2) {
      if (_i2 >= _iterator2.length) break;
      _ref3 = _iterator2[_i2++];
    } else {
      _i2 = _iterator2.next();
      if (_i2.done) break;
      _ref3 = _i2.value;
    }

    var m = _ref3;
    var content = m.content;
    var property = m.property;

    if (alias[property]) {
      property = alias[property];
    }

    var path = property.split(':');
    var node = result;
    var i = 0;

    for (; i < path.length; i++) {
      var p = path[i];
      var currentPath = path.slice(0, i + 1).join(':');

      if (arrays.includes(currentPath)) {
        if (!node[p]) {
          node[p] = [];
        }

        var array = node[p];

        if (i === path.length - 1) {
          // string array
          array.push(content);
        } else {
          // object array
          if (array.length) {
            var existing = array[array.length - 1];
            var child = existing[path[i + 1]];

            if (!child || child.constructor === Object || child.constructor === Array) {
              node = existing;
              continue;
            }
          }

          var newNode = {};
          node[p].push(newNode);
          node = newNode;
        }
      } else {
        if (i === path.length - 1) {
          node[p] = content;
        } else {
          if (node[p] == null) {
            node[p] = {};
          } else if (node[p].constructor === String) {
            node[p] = {
              _: node[p]
            };
          }

          node = node[p];
        }
      }
    }
  }

  return Object.keys(result).length ? result : null;
}
var index = {
  parse: parse,
  parseFromDocument: parseFromDocument,
  parseMetaFromDocument: parseMetaFromDocument
};

exports.default = index;
exports.parse = parse;
exports.parseFromDocument = parseFromDocument;
exports.parseMetaFromDocument = parseMetaFromDocument;