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SourceMapCorrector.ts
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90 lines (73 loc) · 2.75 KB
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import { injectable, inject } from 'inversify';
import { ServiceIdentifiers } from './container/ServiceIdentifiers';
import { TObfuscationResultFactory } from './types/container/TObfuscationResultFactory';
import { ICryptUtils } from './interfaces/utils/ICryptUtils';
import { IObfuscationResult } from './interfaces/IObfuscationResult';
import { IOptions } from './interfaces/options/IOptions';
import { ISourceMapCorrector } from './interfaces/ISourceMapCorrector';
import { SourceMapMode } from './enums/SourceMapMode';
@injectable()
export class SourceMapCorrector implements ISourceMapCorrector {
/**
* @type {ICryptUtils}
*/
private readonly cryptUtils: ICryptUtils;
/**
* @type {TObfuscationResultFactory}
*/
private readonly obfuscationResultFactory: TObfuscationResultFactory;
/**
* @type {IOptions}
*/
private readonly options: IOptions;
/**
* @param {TObfuscationResultFactory} obfuscationResultFactory
* @param {ICryptUtils} cryptUtils
* @param {IOptions} options
*/
constructor (
@inject(ServiceIdentifiers.Factory__IObfuscationResult) obfuscationResultFactory: TObfuscationResultFactory,
@inject(ServiceIdentifiers.ICryptUtils) cryptUtils: ICryptUtils,
@inject(ServiceIdentifiers.IOptions) options: IOptions
) {
this.obfuscationResultFactory = obfuscationResultFactory;
this.cryptUtils = cryptUtils;
this.options = options;
}
/**
* @param {string} obfuscatedCode
* @param {string} sourceMap
* @returns {IObfuscationResult}
*/
public correct (obfuscatedCode: string, sourceMap: string): IObfuscationResult {
return this.obfuscationResultFactory(
this.correctObfuscatedCode(obfuscatedCode, sourceMap),
sourceMap
);
}
/**
* @param {string} obfuscatedCode
* @param {string} sourceMap
* @returns {string}
*/
private correctObfuscatedCode (obfuscatedCode: string, sourceMap: string): string {
if (!sourceMap) {
return obfuscatedCode;
}
const sourceMapUrl: string = this.options.sourceMapBaseUrl + this.options.sourceMapFileName;
let sourceMappingUrl: string = '//# sourceMappingURL=';
switch (this.options.sourceMapMode) {
case SourceMapMode.Inline:
sourceMappingUrl += `data:application/json;base64,${this.cryptUtils.btoa(sourceMap)}`;
break;
case SourceMapMode.Separate:
default:
if (!sourceMapUrl) {
return obfuscatedCode;
}
sourceMappingUrl += sourceMapUrl;
break;
}
return `${obfuscatedCode}\n${sourceMappingUrl}`;
}
}