fei.wang
10 天以前 ae7b22322555448d95fd56f505bafa325c167a26
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
'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;
};