CyberChef/src/core/operations/FromMorseCode.mjs

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/**
* @author tlwr [toby@toby.codes]
* @copyright Crown Copyright 2017
* @license Apache-2.0
*/
import Operation from "../Operation";
import Utils from "../Utils";
import {LETTER_DELIM_OPTIONS, WORD_DELIM_OPTIONS} from "../lib/Delim";
/**
* From Morse Code operation
*/
class FromMorseCode extends Operation {
/**
* FromMorseCode constructor
*/
constructor() {
super();
this.name = "From Morse Code";
this.module = "Default";
this.description = "Translates Morse Code into (upper case) alphanumeric characters.";
this.infoURL = "https://wikipedia.org/wiki/Morse_code";
this.inputType = "string";
this.outputType = "string";
this.args = [
{
"name": "Letter delimiter",
"type": "option",
"value": LETTER_DELIM_OPTIONS
},
{
"name": "Word delimiter",
"type": "option",
"value": WORD_DELIM_OPTIONS
}
];
this.patterns = [
{
match: "(?:^[-. \\n]{5,}$|^[_. \\n]{5,}$|^(?:dash|dot| |\\n){5,}$)",
flags: "i",
args: ["Space", "Line feed"]
},
];
}
/**
* @param {string} input
* @param {Object[]} args
* @returns {string}
*/
run(input, args) {
if (!this.reversedTable) {
this.reverseTable();
}
const letterDelim = Utils.charRep(args[0]);
const wordDelim = Utils.charRep(args[1]);
input = input.replace(/-|||_||—|dash/ig, "<dash>"); //hyphen-minus|hyphen|minus-sign|undersore|en-dash|em-dash
input = input.replace(/\.|·|dot/ig, "<dot>");
let words = input.split(wordDelim);
const self = this;
words = Array.prototype.map.call(words, function(word) {
const signals = word.split(letterDelim);
const letters = signals.map(function(signal) {
return self.reversedTable[signal];
});
return letters.join("");
});
words = words.join(" ");
return words;
}
/**
* Reverses the Morse Code lookup table
*/
reverseTable() {
this.reversedTable = {};
for (const letter in MORSE_TABLE) {
const signal = MORSE_TABLE[letter];
this.reversedTable[signal] = letter;
}
}
}
const MORSE_TABLE = {
"A": "<dot><dash>",
"B": "<dash><dot><dot><dot>",
"C": "<dash><dot><dash><dot>",
"D": "<dash><dot><dot>",
"E": "<dot>",
"F": "<dot><dot><dash><dot>",
"G": "<dash><dash><dot>",
"H": "<dot><dot><dot><dot>",
"I": "<dot><dot>",
"J": "<dot><dash><dash><dash>",
"K": "<dash><dot><dash>",
"L": "<dot><dash><dot><dot>",
"M": "<dash><dash>",
"N": "<dash><dot>",
"O": "<dash><dash><dash>",
"P": "<dot><dash><dash><dot>",
"Q": "<dash><dash><dot><dash>",
"R": "<dot><dash><dot>",
"S": "<dot><dot><dot>",
"T": "<dash>",
"U": "<dot><dot><dash>",
"V": "<dot><dot><dot><dash>",
"W": "<dot><dash><dash>",
"X": "<dash><dot><dot><dash>",
"Y": "<dash><dot><dash><dash>",
"Z": "<dash><dash><dot><dot>",
"1": "<dot><dash><dash><dash><dash>",
"2": "<dot><dot><dash><dash><dash>",
"3": "<dot><dot><dot><dash><dash>",
"4": "<dot><dot><dot><dot><dash>",
"5": "<dot><dot><dot><dot><dot>",
"6": "<dash><dot><dot><dot><dot>",
"7": "<dash><dash><dot><dot><dot>",
"8": "<dash><dash><dash><dot><dot>",
"9": "<dash><dash><dash><dash><dot>",
"0": "<dash><dash><dash><dash><dash>",
".": "<dot><dash><dot><dash><dot><dash>",
",": "<dash><dash><dot><dot><dash><dash>",
":": "<dash><dash><dash><dot><dot><dot>",
";": "<dash><dot><dash><dot><dash><dot>",
"!": "<dash><dot><dash><dot><dash><dash>",
"?": "<dot><dot><dash><dash><dot><dot>",
"'": "<dot><dash><dash><dash><dash><dot>",
"\"": "<dot><dash><dot><dot><dash><dot>",
"/": "<dash><dot><dot><dash><dot>",
"-": "<dash><dot><dot><dot><dot><dash>",
"+": "<dot><dash><dot><dash><dot>",
"(": "<dash><dot><dash><dash><dot>",
")": "<dash><dot><dash><dash><dot><dash>",
"@": "<dot><dash><dash><dot><dash><dot>",
"=": "<dash><dot><dot><dot><dash>",
"&": "<dot><dash><dot><dot><dot>",
"_": "<dot><dot><dash><dash><dot><dash>",
"$": "<dot><dot><dot><dash><dot><dot><dash>"
};
export default FromMorseCode;