39 lines
1.3 KiB
JavaScript
39 lines
1.3 KiB
JavaScript
'use strict';
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const trimRepeated = require('trim-repeated');
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const filenameReservedRegex = require('filename-reserved-regex');
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const stripOuter = require('strip-outer');
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// Doesn't make sense to have longer filenames
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const MAX_FILENAME_LENGTH = 100;
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const reControlChars = /[\u0000-\u001f\u0080-\u009f]/g; // eslint-disable-line no-control-regex
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const reRelativePath = /^\.+/;
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const filenamify = (string, options = {}) => {
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if (typeof string !== 'string') {
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throw new TypeError('Expected a string');
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}
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const replacement = options.replacement === undefined ? '!' : options.replacement;
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if (filenameReservedRegex().test(replacement) && reControlChars.test(replacement)) {
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throw new Error('Replacement string cannot contain reserved filename characters');
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}
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string = string.replace(filenameReservedRegex(), replacement);
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string = string.replace(reControlChars, replacement);
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string = string.replace(reRelativePath, replacement);
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if (replacement.length > 0) {
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string = trimRepeated(string, replacement);
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string = string.length > 1 ? stripOuter(string, replacement) : string;
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}
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string = filenameReservedRegex.windowsNames().test(string) ? string + replacement : string;
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string = string.slice(0, typeof options.maxLength === 'number' ? options.maxLength : MAX_FILENAME_LENGTH);
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return string;
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};
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module.exports = filenamify;
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