mrpiglr
190b6b2eab
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43 lines
1.2 KiB
JavaScript
43 lines
1.2 KiB
JavaScript
'use strict';
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var $TypeError = require('es-errors/type');
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var inspect = require('object-inspect');
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var getSideChannelList = require('side-channel-list');
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var getSideChannelMap = require('side-channel-map');
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var getSideChannelWeakMap = require('side-channel-weakmap');
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var makeChannel = getSideChannelWeakMap || getSideChannelMap || getSideChannelList;
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/** @type {import('.')} */
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module.exports = function getSideChannel() {
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/** @typedef {ReturnType<typeof getSideChannel>} Channel */
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/** @type {Channel | undefined} */ var $channelData;
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/** @type {Channel} */
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var channel = {
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assert: function (key) {
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if (!channel.has(key)) {
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throw new $TypeError('Side channel does not contain ' + inspect(key));
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}
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},
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'delete': function (key) {
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return !!$channelData && $channelData['delete'](key);
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},
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get: function (key) {
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return $channelData && $channelData.get(key);
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},
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has: function (key) {
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return !!$channelData && $channelData.has(key);
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},
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set: function (key, value) {
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if (!$channelData) {
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$channelData = makeChannel();
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}
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$channelData.set(key, value);
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}
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};
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// @ts-expect-error TODO: figure out why this is erroring
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return channel;
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};
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