| 1 |
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| 2 | var oldProxy = Proxy;
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| 3 |
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| 4 | global['Proxy'] = new oldProxy(oldProxy, {
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| 5 | get: function (target, key)
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| 6 | {
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| 7 | if (typeof (key) == 'symbol' && key == Symbol.hasInstance)
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| 8 | {
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| 9 | return function (o)
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| 10 | {
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| 11 | return o && o[Symbol.for('isProxy')];
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| 12 | }
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| 13 | }
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| 14 | return Reflect.get(target, key);
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| 15 | }
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| 16 | });
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| 17 |
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| 18 | export function chain<T extends Function>(target: T, keyHandler: (keys: string[], ...args) => any[])
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| 19 | {
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| 20 | var configProxyGetter = {
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| 21 | get: function chain(target: T, key)
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| 22 | {
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| 23 | var keys: string[] = [];
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| 24 | if (typeof (key) == 'symbol')
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| 25 | {
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| 26 | switch (key.toString())
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| 27 | {
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| 28 | case 'Symbol(util.inspect.custom)':
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| 29 | return () => target;
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| 30 | case 'Symbol(Symbol.toPrimitive)':
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| 31 | return target[Symbol.toPrimitive];
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| 32 | case 'Symbol(isProxy)':
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| 33 | return true;
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| 34 | default:
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| 35 | throw new Error('Not supported');
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| 36 | }
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| 37 | }
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| 38 | switch (key)
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| 39 | {
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| 40 | case 'then':
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| 41 | let c = target();
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| 42 | return c.then.bind(c);
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| 43 | case 'apply':
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| 44 | return target.apply;
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| 45 | case 'length':
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| 46 | return target.length;
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| 47 | case 'toString':
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| 48 | return target.toString.bind(target);
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| 49 | default:
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| 50 | keys.push(key);
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| 51 | let proxy = new Proxy(function (...args)
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| 52 | {
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| 53 | if (!args)
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| 54 | args = [];
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| 55 | args.unshift(keys);
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| 56 | return target.apply(this, keyHandler.apply(this, args));
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| 57 | }, {
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| 58 | get: function (getConfig, subKey)
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| 59 | {
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| 60 | if (typeof (subKey) == 'symbol')
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| 61 | {
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| 62 | switch (subKey.toString())
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| 63 | {
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| 64 | case 'Symbol(util.inspect.custom)':
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| 65 | return () => target;
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| 66 | case 'Symbol(Symbol.toPrimitive)':
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| 67 | return target[Symbol.toPrimitive];
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| 68 | case 'Symbol(isProxy)':
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| 69 | return true;
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| 70 | default:
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| 71 | throw new Error('Not supported');
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| 72 | }
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| 73 | }
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| 74 | switch (subKey)
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| 75 | {
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| 76 | case 'then':
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| 77 | let c = target.apply(this, keyHandler(keys));
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| 78 | return c.then.bind(c);
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| 79 | case 'apply':
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| 80 | return getConfig.apply;
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| 81 | case 'length':
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| 82 | return target.length;
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| 83 | case 'toString':
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| 84 | return target.toString.bind(target);
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| 85 | }
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| 86 | if (subKey)
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| 87 | keys.push(subKey.toString());
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| 88 | return proxy;
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| 89 | }
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| 90 | });
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| 91 | return proxy;
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| 92 | }
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| 93 | }
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| 94 | };
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| 95 | return new Proxy(target, configProxyGetter);
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| 96 | }
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