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;