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107 lines
2.6 KiB
107 lines
2.6 KiB
'use strict';
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var GetIntrinsic = require('es-abstract/GetIntrinsic');
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var callBound = require('es-abstract/helpers/callBound');
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var inspect = require('object-inspect');
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var $TypeError = GetIntrinsic('%TypeError%');
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var $WeakMap = GetIntrinsic('%WeakMap%', true);
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var $Map = GetIntrinsic('%Map%', true);
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var $push = callBound('Array.prototype.push');
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var $weakMapGet = callBound('WeakMap.prototype.get', true);
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var $weakMapSet = callBound('WeakMap.prototype.set', true);
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var $weakMapHas = callBound('WeakMap.prototype.has', true);
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var $mapGet = callBound('Map.prototype.get', true);
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var $mapSet = callBound('Map.prototype.set', true);
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var $mapHas = callBound('Map.prototype.has', true);
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var objectGet = function (objects, key) { // eslint-disable-line consistent-return
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for (var i = 0; i < objects.length; i += 1) {
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if (objects[i].key === key) {
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return objects[i].value;
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}
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}
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};
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var objectSet = function (objects, key, value) {
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for (var i = 0; i < objects.length; i += 1) {
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if (objects[i].key === key) {
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objects[i].value = value; // eslint-disable-line no-param-reassign
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return;
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}
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}
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$push(objects, {
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key: key,
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value: value
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});
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};
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var objectHas = function (objects, key) {
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for (var i = 0; i < objects.length; i += 1) {
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if (objects[i].key === key) {
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return true;
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}
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}
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return false;
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};
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module.exports = function getSideChannel() {
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var $wm;
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var $m;
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var $o;
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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 $TypeError('Side channel does not contain ' + inspect(key));
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}
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},
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get: function (key) { // eslint-disable-line consistent-return
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if ($WeakMap && key && (typeof key === 'object' || typeof key === 'function')) {
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if ($wm) {
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return $weakMapGet($wm, key);
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}
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} else if ($Map) {
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if ($m) {
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return $mapGet($m, key);
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}
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} else {
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if ($o) { // eslint-disable-line no-lonely-if
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return objectGet($o, key);
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}
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}
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},
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has: function (key) {
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if ($WeakMap && key && (typeof key === 'object' || typeof key === 'function')) {
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if ($wm) {
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return $weakMapHas($wm, key);
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}
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} else if ($Map) {
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if ($m) {
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return $mapHas($m, key);
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}
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} else {
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if ($o) { // eslint-disable-line no-lonely-if
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return objectHas($o, key);
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}
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}
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return false;
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},
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set: function (key, value) {
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if ($WeakMap && key && (typeof key === 'object' || typeof key === 'function')) {
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if (!$wm) {
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$wm = new $WeakMap();
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}
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$weakMapSet($wm, key, value);
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} else if ($Map) {
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if (!$m) {
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$m = new $Map();
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}
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$mapSet($m, key, value);
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} else {
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if (!$o) {
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$o = [];
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}
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objectSet($o, key, value);
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}
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}
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};
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return channel;
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};
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