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103 lines
3.1 KiB
103 lines
3.1 KiB
// Source & more langs: https://gist.github.com/sgmurphy/3095196
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/* eslint-disable object-property-newline */
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const char_map = {
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// Latin
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'À': 'A', 'Á': 'A', 'Â': 'A', 'Ã': 'A', 'Ä': 'A', 'Å': 'A', 'Æ': 'AE', 'Ç': 'C',
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'È': 'E', 'É': 'E', 'Ê': 'E', 'Ë': 'E', 'Ì': 'I', 'Í': 'I', 'Î': 'I', 'Ï': 'I',
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'Ð': 'D', 'Ñ': 'N', 'Ò': 'O', 'Ó': 'O', 'Ô': 'O', 'Õ': 'O', 'Ö': 'O', 'Ő': 'O',
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'Ø': 'O', 'Ù': 'U', 'Ú': 'U', 'Û': 'U', 'Ü': 'U', 'Ű': 'U', 'Ý': 'Y', 'Þ': 'TH',
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'ß': 'ss',
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'à': 'a', 'á': 'a', 'â': 'a', 'ã': 'a', 'ä': 'a', 'å': 'a', 'æ': 'ae', 'ç': 'c',
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'è': 'e', 'é': 'e', 'ê': 'e', 'ë': 'e', 'ì': 'i', 'í': 'i', 'î': 'i', 'ï': 'i',
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'ð': 'd', 'ñ': 'n', 'ò': 'o', 'ó': 'o', 'ô': 'o', 'õ': 'o', 'ö': 'o', 'ő': 'o',
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'ø': 'o', 'ù': 'u', 'ú': 'u', 'û': 'u', 'ü': 'u', 'ű': 'u', 'ý': 'y', 'þ': 'th',
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'ÿ': 'y',
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// Latin symbols
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'©': '(c)',
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// Czech
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'Č': 'C', 'Ď': 'D', 'Ě': 'E', 'Ň': 'N', 'Ř': 'R', 'Š': 'S', 'Ť': 'T', 'Ů': 'U',
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'Ž': 'Z',
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'č': 'c', 'ď': 'd', 'ě': 'e', 'ň': 'n', 'ř': 'r', 'š': 's', 'ť': 't', 'ů': 'u',
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'ž': 'z',
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// Polish
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'Ą': 'A', 'Ć': 'C', 'Ę': 'e', 'Ł': 'L', 'Ń': 'N', 'Ś': 'S', 'Ź': 'Z',
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'Ż': 'Z',
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'ą': 'a', 'ć': 'c', 'ę': 'e', 'ł': 'l', 'ń': 'n', 'ś': 's', 'ź': 'z',
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'ż': 'z'
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}
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/* eslint-enable object-property-newline */
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const alnum = new RegExp('[^a-z0-9]+', 'ig')
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/**
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* Create a web friendly URL slug from a string.
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*
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* Although supported, transliteration is discouraged because
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* 1) most web browsers support UTF-8 characters in URLs
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* 2) transliteration causes a loss of information
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*
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* @author Sean Murphy <sean@iamseanmurphy.com>
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* @copyright Copyright 2012 Sean Murphy. All rights reserved.
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* @license http://creativecommons.org/publicdomain/zero/1.0/
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*
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* @return string
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* @param {string} s
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* @param {object} opt
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*/
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function url_slug (s, opt) {
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let k
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s = String(s)
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opt = Object(opt)
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const defaults = {
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'delimiter': '-',
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'limit': undefined,
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'lowercase': true,
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'replacements': {},
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'transliterate': true
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}
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// Merge options
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for (k in defaults) {
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if (defaults.hasOwnProperty(k) && !opt.hasOwnProperty(k)) {
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opt[k] = defaults[k]
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}
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}
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// Make custom replacements
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for (k in opt.replacements) {
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if (opt.replacements.hasOwnProperty(k)) {
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s = s.replace(new RegExp(k, 'g'), opt.replacements[k])
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}
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}
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// Transliterate characters to ASCII
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if (opt.transliterate) {
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for (k in char_map) {
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if (char_map.hasOwnProperty(k)) {
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s = s.replace(new RegExp(k, 'g'), char_map[k])
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}
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}
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}
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// Replace non-alphanumeric characters with our delimiter
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s = s.replace(alnum, opt.delimiter)
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// Remove duplicate delimiters
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s = s.replace(new RegExp('[' + opt.delimiter + ']{2,}', 'g'), opt.delimiter)
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// Truncate slug to max. characters
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s = s.substring(0, opt.limit)
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// Remove delimiter from ends
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s = s.replace(new RegExp('(^' + opt.delimiter + '|' + opt.delimiter + '$)', 'g'), '')
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return opt.lowercase ? s.toLowerCase() : s
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}
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module.exports = url_slug
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