openvidu/openvidu-browser/src/OpenViduInternal/KurentoUtils/kurento-jsonrpc/Mapper.js

function Mapper() {
  var sources = {};


  this.forEach = function (callback) {
    for (var key in sources) {
      var source = sources[key];

      for (var key2 in source)
        callback(source[key2]);
    };
  };

  this.get = function (id, source) {
    var ids = sources[source];
    if (ids == undefined)
      return undefined;

    return ids[id];
  };

  this.remove = function (id, source) {
    var ids = sources[source];
    if (ids == undefined)
      return;

    delete ids[id];

    // Check it's empty
    for (var i in ids) {
      return false
    }

    delete sources[source];
  };

  this.set = function (value, id, source) {
    if (value == undefined)
      return this.remove(id, source);

    var ids = sources[source];
    if (ids == undefined)
      sources[source] = ids = {};

    ids[id] = value;
  };
};


Mapper.prototype.pop = function (id, source) {
  var value = this.get(id, source);
  if (value == undefined)
    return undefined;

  this.remove(id, source);

  return value;
};


module.exports = Mapper;