source: frontend/node_modules/camelcase/index.js

'use strict';

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 && UPPERCASE.test(character)) {
                        string = string.slice(0, i) + '-' + string.slice(i);
                        isLastCharLower = false;
                        isLastLastCharUpper = isLastCharUpper;
                        isLastCharUpper = true;
                        i++;
                } 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 = toLowerCase(character) === character && toUpperCase(character) !== character;
                        isLastLastCharUpper = isLastCharUpper;
                        isLastCharUpper = toUpperCase(character) === character && toLowerCase(character) !== character;
                }
        }

        return string;
};

const preserveConsecutiveUppercase = (input, toLowerCase) => {
        LEADING_CAPITAL.lastIndex = 0;

        return input.replace(LEADING_CAPITAL, m1 => toLowerCase(m1));
};

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) => {
        if (!(typeof input === 'string' || Array.isArray(input))) {
                throw new TypeError('Expected the input to be `string | string[]`');
        }

        options = {
                pascalCase: false,
                preserveConsecutiveUppercase: false,
                ...options
        };

        if (Array.isArray(input)) {
                input = input.map(x => x.trim())
                        .filter(x => x.length)
                        .join('-');
        } else {
                input = input.trim();
        }

        if (input.length === 0) {
                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 ? toUpperCase(input) : toLowerCase(input);
        }

        const hasUpperCase = input !== toLowerCase(input);

        if (hasUpperCase) {
                input = preserveCamelCase(input, toLowerCase, toUpperCase);
        }

        input = input.replace(LEADING_SEPARATORS, '');

        if (options.preserveConsecutiveUppercase) {
                input = preserveConsecutiveUppercase(input, toLowerCase);
        } else {
                input = toLowerCase(input);
        }

        if (options.pascalCase) {
                input = toUpperCase(input.charAt(0)) + input.slice(1);
        }

        return postProcess(input, toUpperCase);
};

module.exports = camelCase;
// TODO: Remove this for the next major release
module.exports.default = camelCase;