source: frontend/node_modules/side-channel/index.js

'use strict';

var $TypeError = require('es-errors/type');
var inspect = require('object-inspect');
var getSideChannelList = require('side-channel-list');
var getSideChannelMap = require('side-channel-map');
var getSideChannelWeakMap = require('side-channel-weakmap');

var makeChannel = getSideChannelWeakMap || getSideChannelMap || getSideChannelList;

/** @type {import('.')} */
module.exports = function getSideChannel() {
        /** @typedef {ReturnType<typeof getSideChannel>} Channel */

        /** @type {Channel | undefined} */ var $channelData;

        /** @type {Channel} */
        var channel = {
                assert: function (key) {
                        if (!channel.has(key)) {
                                throw new $TypeError('Side channel does not contain ' + inspect(key));
                        }
                },
                'delete': function (key) {
                        return !!$channelData && $channelData['delete'](key);
                },
                get: function (key) {
                        return $channelData && $channelData.get(key);
                },
                has: function (key) {
                        return !!$channelData && $channelData.has(key);
                },
                set: function (key, value) {
                        if (!$channelData) {
                                $channelData = makeChannel();
                        }

                        $channelData.set(key, value);
                }
        };
        // @ts-expect-error TODO: figure out why this is erroring
        return channel;
};