| 1 | 'use strict';
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| 2 |
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| 3 | var GetIntrinsic = require('get-intrinsic');
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| 4 | var callBound = require('call-bound');
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| 5 | var inspect = require('object-inspect');
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| 6 | var getSideChannelMap = require('side-channel-map');
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| 7 |
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| 8 | var $TypeError = require('es-errors/type');
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| 9 | var $WeakMap = GetIntrinsic('%WeakMap%', true);
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| 10 |
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| 11 | /** @type {<K extends object, V>(thisArg: WeakMap<K, V>, key: K) => V} */
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| 12 | var $weakMapGet = callBound('WeakMap.prototype.get', true);
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| 13 | /** @type {<K extends object, V>(thisArg: WeakMap<K, V>, key: K, value: V) => void} */
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| 14 | var $weakMapSet = callBound('WeakMap.prototype.set', true);
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| 15 | /** @type {<K extends object, V>(thisArg: WeakMap<K, V>, key: K) => boolean} */
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| 16 | var $weakMapHas = callBound('WeakMap.prototype.has', true);
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| 17 | /** @type {<K extends object, V>(thisArg: WeakMap<K, V>, key: K) => boolean} */
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| 18 | var $weakMapDelete = callBound('WeakMap.prototype.delete', true);
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| 19 |
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| 20 | /** @type {import('.')} */
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| 21 | module.exports = $WeakMap
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| 22 | ? /** @type {Exclude<import('.'), false>} */ function getSideChannelWeakMap() {
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| 23 | /** @typedef {ReturnType<typeof getSideChannelWeakMap>} Channel */
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| 24 | /** @typedef {Parameters<Channel['get']>[0]} K */
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| 25 | /** @typedef {Parameters<Channel['set']>[1]} V */
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| 26 |
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| 27 | /** @type {WeakMap<K & object, V> | undefined} */ var $wm;
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| 28 | /** @type {Channel | undefined} */ var $m;
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| 29 |
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| 30 | /** @type {Channel} */
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| 31 | var channel = {
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| 32 | assert: function (key) {
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| 33 | if (!channel.has(key)) {
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| 34 | throw new $TypeError('Side channel does not contain ' + inspect(key));
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| 35 | }
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| 36 | },
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| 37 | 'delete': function (key) {
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| 38 | if ($WeakMap && key && (typeof key === 'object' || typeof key === 'function')) {
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| 39 | if ($wm) {
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| 40 | return $weakMapDelete($wm, key);
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| 41 | }
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| 42 | } else if (getSideChannelMap) {
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| 43 | if ($m) {
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| 44 | return $m['delete'](key);
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| 45 | }
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| 46 | }
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| 47 | return false;
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| 48 | },
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| 49 | get: function (key) {
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| 50 | if ($WeakMap && key && (typeof key === 'object' || typeof key === 'function')) {
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| 51 | if ($wm) {
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| 52 | return $weakMapGet($wm, key);
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| 53 | }
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| 54 | }
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| 55 | return $m && $m.get(key);
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| 56 | },
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| 57 | has: function (key) {
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| 58 | if ($WeakMap && key && (typeof key === 'object' || typeof key === 'function')) {
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| 59 | if ($wm) {
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| 60 | return $weakMapHas($wm, key);
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| 61 | }
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| 62 | }
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| 63 | return !!$m && $m.has(key);
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| 64 | },
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| 65 | set: function (key, value) {
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| 66 | if ($WeakMap && key && (typeof key === 'object' || typeof key === 'function')) {
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| 67 | if (!$wm) {
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| 68 | $wm = new $WeakMap();
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| 69 | }
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| 70 | $weakMapSet($wm, key, value);
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| 71 | } else if (getSideChannelMap) {
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| 72 | if (!$m) {
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| 73 | $m = getSideChannelMap();
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| 74 | }
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| 75 | // eslint-disable-next-line no-extra-parens
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| 76 | /** @type {NonNullable<typeof $m>} */ ($m).set(key, value);
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| 77 | }
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| 78 | }
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| 79 | };
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| 80 |
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| 81 | // @ts-expect-error TODO: figure out why this is erroring
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| 82 | return channel;
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| 83 | }
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| 84 | : getSideChannelMap;
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