mirror of https://github.com/gchq/CyberChef.git
85 lines
2.4 KiB
JavaScript
85 lines
2.4 KiB
JavaScript
/**
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2018
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* @license Apache-2.0
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*/
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import Operation from "../Operation.mjs";
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import Dish from "../Dish.mjs";
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import { getLabelIndex } from "../lib/FlowControl.mjs";
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/**
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* Conditional Jump operation
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*/
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class ConditionalJump extends Operation {
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/**
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* ConditionalJump constructor
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*/
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constructor() {
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super();
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this.name = "Conditional Jump";
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this.flowControl = true;
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this.module = "Default";
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this.description = "Conditionally jump forwards or backwards to the specified Label based on whether the data matches the specified 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": "Match (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 match",
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"type": "boolean",
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"value": false
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},
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{
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"name": "Label name",
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"type": "shortString",
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"value": ""
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},
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{
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"name": "Maximum jumps (if jumping backwards)",
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"type": "number",
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"value": 10
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}
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];
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}
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/**
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* @param {Object} state - The current state of the recipe.
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* @param {number} state.progress - The current position in the recipe.
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* @param {Dish} state.dish - The Dish being operated on.
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* @param {Operation[]} state.opList - The list of operations in the recipe.
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* @param {number} state.numJumps - The number of jumps taken so far.
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* @returns {Object} The updated state of the recipe.
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*/
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async run(state) {
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const ings = state.opList[state.progress].ingValues,
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dish = state.dish,
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[regexStr, invert, label, maxJumps] = ings,
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jmpIndex = getLabelIndex(label, state);
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if (state.numJumps >= maxJumps || jmpIndex === -1) {
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return state;
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}
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if (regexStr !== "") {
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const str = await dish.get(Dish.STRING);
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const strMatch = str.search(regexStr) > -1;
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if (!invert && strMatch || invert && !strMatch) {
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state.progress = jmpIndex;
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state.numJumps++;
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}
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}
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return state;
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}
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}
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export default ConditionalJump;
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