125 lines
3.2 KiB
JavaScript
125 lines
3.2 KiB
JavaScript
'use strict';
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const convertExpression = require('./convert-expression');
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const validationRegex = /^(?:\d+|\*|\*\/\d+)$/;
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/**
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* @param {string} expression The Cron-Job expression.
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* @param {number} min The minimum value.
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* @param {number} max The maximum value.
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* @returns {boolean}
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*/
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function isValidExpression(expression, min, max) {
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const options = expression.split(',');
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for (const option of options) {
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const optionAsInt = parseInt(option, 10);
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if (
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(!Number.isNaN(optionAsInt) &&
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(optionAsInt < min || optionAsInt > max)) ||
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!validationRegex.test(option)
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)
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return false;
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}
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return true;
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}
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/**
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* @param {string} expression The Cron-Job expression.
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* @returns {boolean}
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*/
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function isInvalidSecond(expression) {
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return !isValidExpression(expression, 0, 59);
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}
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/**
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* @param {string} expression The Cron-Job expression.
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* @returns {boolean}
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*/
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function isInvalidMinute(expression) {
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return !isValidExpression(expression, 0, 59);
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}
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/**
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* @param {string} expression The Cron-Job expression.
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* @returns {boolean}
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*/
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function isInvalidHour(expression) {
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return !isValidExpression(expression, 0, 23);
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}
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/**
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* @param {string} expression The Cron-Job expression.
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* @returns {boolean}
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*/
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function isInvalidDayOfMonth(expression) {
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return !isValidExpression(expression, 1, 31);
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}
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/**
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* @param {string} expression The Cron-Job expression.
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* @returns {boolean}
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*/
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function isInvalidMonth(expression) {
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return !isValidExpression(expression, 1, 12);
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}
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/**
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* @param {string} expression The Cron-Job expression.
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* @returns {boolean}
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*/
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function isInvalidWeekDay(expression) {
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return !isValidExpression(expression, 0, 7);
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}
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/**
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* @param {string[]} patterns The Cron-Job expression patterns.
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* @param {string[]} executablePatterns The executable Cron-Job expression
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* patterns.
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* @returns {void}
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*/
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function validateFields(patterns, executablePatterns) {
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if (isInvalidSecond(executablePatterns[0]))
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throw new Error(`${patterns[0]} is a invalid expression for second`);
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if (isInvalidMinute(executablePatterns[1]))
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throw new Error(`${patterns[1]} is a invalid expression for minute`);
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if (isInvalidHour(executablePatterns[2]))
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throw new Error(`${patterns[2]} is a invalid expression for hour`);
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if (isInvalidDayOfMonth(executablePatterns[3]))
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throw new Error(
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`${patterns[3]} is a invalid expression for day of month`
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);
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if (isInvalidMonth(executablePatterns[4]))
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throw new Error(`${patterns[4]} is a invalid expression for month`);
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if (isInvalidWeekDay(executablePatterns[5]))
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throw new Error(`${patterns[5]} is a invalid expression for week day`);
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}
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/**
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* Validates a Cron-Job expression pattern.
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*
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* @param {string} pattern The Cron-Job expression pattern.
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* @returns {void}
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*/
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function validate(pattern) {
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if (typeof pattern !== 'string')
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throw new TypeError('pattern must be a string!');
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const patterns = pattern.split(' ');
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const executablePatterns = convertExpression(pattern).split(' ');
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if (patterns.length === 5) patterns.unshift('0');
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validateFields(patterns, executablePatterns);
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}
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module.exports = validate;
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