mirror of https://github.com/gchq/CyberChef.git
74 lines
1.7 KiB
JavaScript
74 lines
1.7 KiB
JavaScript
/**
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2016
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* @license Apache-2.0
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*/
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import Operation from "../Operation";
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import Utils from "../Utils";
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import {INPUT_DELIM_OPTIONS} from "../lib/Delim";
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import OperationError from "../errors/OperationError";
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import XRegExp from "xregexp";
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/**
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* Filter operation
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*/
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class Filter extends Operation {
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/**
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* Filter constructor
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*/
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constructor() {
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super();
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this.name = "Filter";
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this.module = "Regex";
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this.description = "Splits up the input using the specified delimiter and then filters each branch based on a regular expression.";
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this.inputType = "string";
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this.outputType = "string";
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this.args = [
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{
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"name": "Delimiter",
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"type": "option",
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"value": INPUT_DELIM_OPTIONS
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},
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{
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"name": "Regex",
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"type": "string",
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"value": ""
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},
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{
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"name": "Invert condition",
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"type": "boolean",
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"value": false
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}
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];
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}
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/**
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run(input, args) {
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const delim = Utils.charRep(args[0]),
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reverse = args[2];
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let regex;
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try {
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regex = new XRegExp(args[1]);
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} catch (err) {
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throw new OperationError(`Invalid regex. Details: ${err.message}`);
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}
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const regexFilter = function(value) {
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return reverse ^ regex.test(value);
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};
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return input.split(delim).filter(regexFilter).join(delim);
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}
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}
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export default Filter;
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