1 | import escapeStringRegexp from 'escape-string-regexp';
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2 | import transliterate from '@sindresorhus/transliterate';
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3 | import builtinOverridableReplacements from './overridable-replacements.js';
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4 |
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5 | const decamelize = string => {
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6 | return string
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7 |
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8 | .replace(/([A-Z]{2,})(\d+)/g, '$1 $2')
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9 | .replace(/([a-z\d]+)([A-Z]{2,})/g, '$1 $2')
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10 |
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11 | .replace(/([a-z\d])([A-Z])/g, '$1 $2')
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12 |
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13 |
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14 | .replace(/([A-Z]+)([A-Z][a-rt-z\d]+)/g, '$1 $2');
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15 | };
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16 |
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17 | const removeMootSeparators = (string, separator) => {
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18 | const escapedSeparator = escapeStringRegexp(separator);
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19 |
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20 | return string
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21 | .replace(new RegExp(`${escapedSeparator}{2,}`, 'g'), separator)
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22 | .replace(new RegExp(`^${escapedSeparator}|${escapedSeparator}$`, 'g'), '');
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23 | };
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24 |
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25 | export default function slugify(string, options) {
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26 | if (typeof string !== 'string') {
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27 | throw new TypeError(`Expected a string, got \`${typeof string}\``);
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28 | }
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29 |
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30 | options = {
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31 | separator: '-',
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32 | lowercase: true,
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33 | decamelize: true,
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34 | customReplacements: [],
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35 | preserveLeadingUnderscore: false,
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36 | preserveTrailingDash: false,
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37 | ...options
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38 | };
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39 |
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40 | const shouldPrependUnderscore = options.preserveLeadingUnderscore && string.startsWith('_');
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41 | const shouldAppendDash = options.preserveTrailingDash && string.endsWith('-');
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42 |
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43 | const customReplacements = new Map([
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44 | ...builtinOverridableReplacements,
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45 | ...options.customReplacements
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46 | ]);
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47 |
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48 | string = transliterate(string, {customReplacements});
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49 |
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50 | if (options.decamelize) {
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51 | string = decamelize(string);
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52 | }
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53 |
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54 | let patternSlug = /[^a-zA-Z\d]+/g;
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55 |
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56 | if (options.lowercase) {
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57 | string = string.toLowerCase();
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58 | patternSlug = /[^a-z\d]+/g;
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59 | }
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60 |
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61 | string = string.replace(patternSlug, options.separator);
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62 | string = string.replace(/\\/g, '');
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63 | if (options.separator) {
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64 | string = removeMootSeparators(string, options.separator);
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65 | }
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66 |
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67 | if (shouldPrependUnderscore) {
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68 | string = `_${string}`;
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69 | }
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70 |
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71 | if (shouldAppendDash) {
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72 | string = `${string}-`;
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73 | }
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74 |
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75 | return string;
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76 | }
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77 |
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78 | export function slugifyWithCounter() {
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79 | const occurrences = new Map();
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80 |
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81 | const countable = (string, options) => {
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82 | string = slugify(string, options);
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83 |
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84 | if (!string) {
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85 | return '';
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86 | }
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87 |
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88 | const stringLower = string.toLowerCase();
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89 | const numberless = occurrences.get(stringLower.replace(/(?:-\d+?)+?$/, '')) || 0;
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90 | const counter = occurrences.get(stringLower);
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91 | occurrences.set(stringLower, typeof counter === 'number' ? counter + 1 : 1);
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92 | const newCounter = occurrences.get(stringLower) || 2;
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93 | if (newCounter >= 2 || numberless > 2) {
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94 | string = `${string}-${newCounter}`;
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95 | }
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96 |
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97 | return string;
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98 | };
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99 |
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100 | countable.reset = () => {
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101 | occurrences.clear();
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102 | };
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103 |
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104 | return countable;
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105 | }
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