91 lines
2.9 KiB
JavaScript
91 lines
2.9 KiB
JavaScript
/**
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* @author mikecat
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* @copyright Crown Copyright 2022
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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 moment from "moment-timezone";
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import OperationError from "../errors/OperationError.mjs";
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/**
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* To MS-DOS Date and Time operation
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*/
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class ToMSDOSDateAndTime extends Operation {
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/**
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* ToMSDOSDateAndTime constructor
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*/
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constructor() {
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super();
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this.name = "To MS-DOS Date and Time";
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this.module = "Default";
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this.description = "Parses a datetime string and returns the corresponding space-separated pair of MS-DOS date and time in this order.<br>Each of date and time are represented as 16-bit unsigned integers.<br>Years between 1980 and 2107 (inclusive) are supported.<br><br>Some examples of where MS-DOS date and time are used are ZIP archive file and FAT filesystem.";
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this.infoURL = "https://learn.microsoft.com/en-us/windows/win32/sysinfo/ms-dos-date-and-time";
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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": "Output Format",
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"type": "option",
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"value": ["Decimal", "Hex"]
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},
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{
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"name": "Show parsed datetime",
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"type": "boolean",
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"value": true
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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 outputFormat = args[0], showDate = args[1];
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const date = moment(input);
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if (!date.isValid()) {
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throw new OperationError("invalid input");
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}
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const outputFormatter = (function() {
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switch (outputFormat) {
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case "Decimal":
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return function(value) {
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return value.toString();
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};
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case "Hex":
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return function(value) {
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const result = value.toString(16);
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if (result.length >= 4) return result;
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return ("0000" + result).substring(result.length);
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};
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default:
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throw new OperationError("undefined output format");
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}
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})();
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const year = date.year();
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if (year < 1980 || 2107 < year) {
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throw new OperationError("out-of-range");
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}
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const dateOut =
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((year - 1980) << 9) |
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((date.month() + 1) << 5) |
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date.date();
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const timeOut =
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(date.hour() << 11) |
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(date.minute() << 5) |
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(date.second() >> 1);
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const output = outputFormatter(dateOut) + " " + outputFormatter(timeOut);
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if (showDate) {
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return output + " (" + date.format("yyyy-MM-DD HH:mm:ss") + ")";
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}
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return output;
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}
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}
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export default ToMSDOSDateAndTime;
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