| | |
| | | 'use strict'; |
| | | |
| | | const preserveCamelCase = (string, locale) => { |
| | | const UPPERCASE = /[\p{Lu}]/u; |
| | | const LOWERCASE = /[\p{Ll}]/u; |
| | | const LEADING_CAPITAL = /^[\p{Lu}](?![\p{Lu}])/gu; |
| | | const IDENTIFIER = /([\p{Alpha}\p{N}_]|$)/u; |
| | | const SEPARATORS = /[_.\- ]+/; |
| | | |
| | | const LEADING_SEPARATORS = new RegExp('^' + SEPARATORS.source); |
| | | const SEPARATORS_AND_IDENTIFIER = new RegExp(SEPARATORS.source + IDENTIFIER.source, 'gu'); |
| | | const NUMBERS_AND_IDENTIFIER = new RegExp('\\d+' + IDENTIFIER.source, 'gu'); |
| | | |
| | | const preserveCamelCase = (string, toLowerCase, toUpperCase) => { |
| | | let isLastCharLower = false; |
| | | let isLastCharUpper = false; |
| | | let isLastLastCharUpper = false; |
| | |
| | | for (let i = 0; i < string.length; i++) { |
| | | const character = string[i]; |
| | | |
| | | if (isLastCharLower && /[\p{Lu}]/u.test(character)) { |
| | | if (isLastCharLower && UPPERCASE.test(character)) { |
| | | string = string.slice(0, i) + '-' + string.slice(i); |
| | | isLastCharLower = false; |
| | | isLastLastCharUpper = isLastCharUpper; |
| | | isLastCharUpper = true; |
| | | i++; |
| | | } else if (isLastCharUpper && isLastLastCharUpper && /[\p{Ll}]/u.test(character)) { |
| | | } else if (isLastCharUpper && isLastLastCharUpper && LOWERCASE.test(character)) { |
| | | string = string.slice(0, i - 1) + '-' + string.slice(i - 1); |
| | | isLastLastCharUpper = isLastCharUpper; |
| | | isLastCharUpper = false; |
| | | isLastCharLower = true; |
| | | } else { |
| | | isLastCharLower = character.toLocaleLowerCase(locale) === character && character.toLocaleUpperCase(locale) !== character; |
| | | isLastCharLower = toLowerCase(character) === character && toUpperCase(character) !== character; |
| | | isLastLastCharUpper = isLastCharUpper; |
| | | isLastCharUpper = character.toLocaleUpperCase(locale) === character && character.toLocaleLowerCase(locale) !== character; |
| | | isLastCharUpper = toUpperCase(character) === character && toLowerCase(character) !== character; |
| | | } |
| | | } |
| | | |
| | | return string; |
| | | }; |
| | | |
| | | const preserveConsecutiveUppercase = input => { |
| | | return input.replace(/^[\p{Lu}](?![\p{Lu}])/gu, m1 => m1.toLowerCase()); |
| | | const preserveConsecutiveUppercase = (input, toLowerCase) => { |
| | | LEADING_CAPITAL.lastIndex = 0; |
| | | |
| | | return input.replace(LEADING_CAPITAL, m1 => toLowerCase(m1)); |
| | | }; |
| | | |
| | | const postProcess = (input, options) => { |
| | | return input.replace(/[_.\- ]+([\p{Alpha}\p{N}_]|$)/gu, (_, p1) => p1.toLocaleUpperCase(options.locale)) |
| | | .replace(/\d+([\p{Alpha}\p{N}_]|$)/gu, m => m.toLocaleUpperCase(options.locale)); |
| | | const postProcess = (input, toUpperCase) => { |
| | | SEPARATORS_AND_IDENTIFIER.lastIndex = 0; |
| | | NUMBERS_AND_IDENTIFIER.lastIndex = 0; |
| | | |
| | | return input.replace(SEPARATORS_AND_IDENTIFIER, (_, identifier) => toUpperCase(identifier)) |
| | | .replace(NUMBERS_AND_IDENTIFIER, m => toUpperCase(m)); |
| | | }; |
| | | |
| | | const camelCase = (input, options) => { |
| | |
| | | return ''; |
| | | } |
| | | |
| | | const toLowerCase = options.locale === false ? |
| | | string => string.toLowerCase() : |
| | | string => string.toLocaleLowerCase(options.locale); |
| | | const toUpperCase = options.locale === false ? |
| | | string => string.toUpperCase() : |
| | | string => string.toLocaleUpperCase(options.locale); |
| | | |
| | | if (input.length === 1) { |
| | | return options.pascalCase ? input.toLocaleUpperCase(options.locale) : input.toLocaleLowerCase(options.locale); |
| | | return options.pascalCase ? toUpperCase(input) : toLowerCase(input); |
| | | } |
| | | |
| | | const hasUpperCase = input !== input.toLocaleLowerCase(options.locale); |
| | | const hasUpperCase = input !== toLowerCase(input); |
| | | |
| | | if (hasUpperCase) { |
| | | input = preserveCamelCase(input, options.locale); |
| | | input = preserveCamelCase(input, toLowerCase, toUpperCase); |
| | | } |
| | | |
| | | input = input.replace(/^[_.\- ]+/, ''); |
| | | input = input.replace(LEADING_SEPARATORS, ''); |
| | | |
| | | if (options.preserveConsecutiveUppercase) { |
| | | input = preserveConsecutiveUppercase(input); |
| | | input = preserveConsecutiveUppercase(input, toLowerCase); |
| | | } else { |
| | | input = input.toLocaleLowerCase(); |
| | | input = toLowerCase(input); |
| | | } |
| | | |
| | | if (options.pascalCase) { |
| | | input = input.charAt(0).toLocaleUpperCase(options.locale) + input.slice(1); |
| | | input = toUpperCase(input.charAt(0)) + input.slice(1); |
| | | } |
| | | |
| | | return postProcess(input, options); |
| | | return postProcess(input, toUpperCase); |
| | | }; |
| | | |
| | | module.exports = camelCase; |