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