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40 lines
1.4 KiB
TypeScript
40 lines
1.4 KiB
TypeScript
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/**
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* Copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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export default class UtilityScript {
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evaluate(functionText: string, ...args: any[]) {
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const argCount = args[0] as number;
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const handleCount = args[argCount + 1] as number;
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const handles = { __proto__: null } as any;
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for (let i = 0; i < handleCount; i++)
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handles[args[argCount + 2 + i]] = args[argCount + 2 + handleCount + i];
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const visit = (arg: any) => {
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if ((typeof arg === 'string') && (arg in handles))
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return handles[arg];
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if (arg && (typeof arg === 'object')) {
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for (const name of Object.keys(arg))
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arg[name] = visit(arg[name]);
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}
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return arg;
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};
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const processedArgs = [];
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for (let i = 0; i < argCount; i++)
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processedArgs[i] = visit(args[i + 1]);
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const func = global.eval('(' + functionText + ')');
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return func(...processedArgs);
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}
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}
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