@guanghechen/helper-string/lib/esm/index.mjs

Utilities for processing strings or stringify other type data.

const SPLIT_LOWER_UPPER_RE = /([\p{Ll}\d])(\p{Lu})/gu;
const SPLIT_UPPER_UPPER_RE = /(\p{Lu})([\p{Lu}][\p{Ll}])/gu;
const SPLIT_NUMBER_LOWER_RE = /(\d)(\p{Ll})/gu;
const SPLIT_LETTER_NUMBER_RE = /(\p{L})(\d)/gu;
const DEFAULT_STRIP_REGEXP = /[^\p{L}\d]+/giu;
const SPLIT_REPLACE_VALUE = '$1\0$2';
function split(input, options = {}) {
    let result = input
        .replace(SPLIT_LOWER_UPPER_RE, SPLIT_REPLACE_VALUE)
        .replace(SPLIT_UPPER_UPPER_RE, SPLIT_REPLACE_VALUE);
    if (options.separateNumbers) {
        result = result
            .replace(SPLIT_NUMBER_LOWER_RE, SPLIT_REPLACE_VALUE)
            .replace(SPLIT_LETTER_NUMBER_RE, SPLIT_REPLACE_VALUE);
    }
    result = result.replace(DEFAULT_STRIP_REGEXP, '\0');
    let start = 0;
    let end = result.length;
    while (result.charAt(start) === '\0')
        start += 1;
    if (start === end)
        return [];
    while (result.charAt(end - 1) === '\0')
        end -= 1;
    return result.slice(start, end).split(/\0/g);
}
function camelCase(input, options) {
    const lower = lowerFactory(options?.locale);
    const upper = upperFactory(options?.locale);
    const transform = pascalCaseTransformFactory(lower, upper);
    return split(input, options)
        .map((word, index) => {
        if (index === 0)
            return lower(word);
        return transform(word, index);
    })
        .join('');
}
function pascalCase(input, options) {
    const lower = lowerFactory(options?.locale);
    const upper = upperFactory(options?.locale);
    return split(input, options).map(pascalCaseTransformFactory(lower, upper)).join('');
}
function capitalCase(input, options) {
    const lower = lowerFactory(options?.locale);
    const upper = upperFactory(options?.locale);
    return split(input, options).map(capitalCaseTransformFactory(lower, upper)).join(' ');
}
function constantCase(input, options) {
    const upper = upperFactory(options?.locale);
    return split(input, options).map(upper).join('_');
}
function dotCase(input, options) {
    const lower = lowerFactory(options?.locale);
    return split(input, options).map(lower).join('.');
}
function kebabCase(input, options) {
    const lower = lowerFactory(options?.locale);
    return split(input, options).map(lower).join('-');
}
function pathCase(input, options) {
    const lower = lowerFactory(options?.locale);
    return split(input, options).map(lower).join('/');
}
function sentenceCase(input, options) {
    const lower = lowerFactory(options?.locale);
    const upper = upperFactory(options?.locale);
    const transform = capitalCaseTransformFactory(lower, upper);
    return split(input, options)
        .map((word, index) => {
        if (index === 0)
            return transform(word, index);
        return lower(word);
    })
        .join(' ');
}
function snakeCase(input, options) {
    const lower = lowerFactory(options?.locale);
    return split(input, options).map(lower).join('_');
}
function lowerFactory(locale) {
    return locale === false
        ? (input) => input.toLowerCase()
        : (input) => input.toLocaleLowerCase(locale);
}
function upperFactory(locale) {
    return locale === false
        ? (input) => input.toUpperCase()
        : (input) => input.toLocaleUpperCase(locale);
}
const capitalCaseTransformFactory = (lower, upper) => {
    return (word) => `${upper(word[0])}${lower(word.slice(1))}`;
};
const pascalCaseTransformFactory = (lower, upper) => {
    return (word, index) => {
        const char0 = word[0];
        const initial = index > 0 && char0 >= '0' && char0 <= '9' ? '_' + char0 : upper(char0);
        return initial + lower(word.slice(1));
    };
};

const TOKENS = /\S+|./g;
const IS_MANUAL_CASE = /\p{Ll}(?=[\p{Lu}])|\.\p{L}/u;
const ALPHANUMERIC_PATTERN = /[\p{L}\d]+/gu;
const WORD_SEPARATORS = new Set(['—', '–', '-', '―', '/']);
const SMALL_WORDS = new Set([
    'an',
    'and',
    'as',
    'at',
    'because',
    'but',
    'by',
    'en',
    'for',
    'if',
    'in',
    'neither',
    'nor',
    'of',
    'on',
    'or',
    'only',
    'over',
    'per',
    'so',
    'some',
    'that',
    'than',
    'the',
    'to',
    'up',
    'upon',
    'v',
    'vs',
    'versus',
    'via',
    'when',
    'with',
    'without',
    'yet',
]);
function titleCase(input, options = {}) {
    let result = '';
    let m;
    const { smallWords = SMALL_WORDS, locale } = typeof options === 'string' || Array.isArray(options) ? { locale: options } : options;
    while ((m = TOKENS.exec(input)) !== null) {
        const { 0: token, index } = m;
        if (IS_MANUAL_CASE.test(token)) {
            result += token;
        }
        else {
            result += token.replace(ALPHANUMERIC_PATTERN, (m, i) => {
                if (index > 0 && index + token.length < input.length && smallWords.has(m)) {
                    return m;
                }
                if (i > 1 && !WORD_SEPARATORS.has(input.charAt(index + i - 1))) {
                    return m;
                }
                return m.charAt(0).toLocaleUpperCase(locale) + m.slice(1);
            });
        }
    }
    return result;
}

function composeTextTransformers(...transformers) {
    return text => {
        let result = text;
        for (const transformer of transformers) {
            result = transformer(result);
        }
        return result;
    };
}
const toCamelCase = text => camelCase(text);
const toCapitalCase = text => capitalCase(text);
const toConstantCase = text => constantCase(text);
const toDotCase = text => dotCase(text);
const toKebabCase = text => kebabCase(text);
const toLowerCase = text => text.toLocaleLowerCase();
const toPascalCase = text => pascalCase(text);
const toPathCase = text => pathCase(text);
const toSentenceCase = text => sentenceCase(text);
const toSnakeCase = text => snakeCase(text);
const toTitleCase = text => titleCase(text);
const toTrim = text => text.trim();
const toUpperCase = text => text.toLocaleUpperCase();

export { composeTextTransformers, toCamelCase, toCapitalCase, toConstantCase, toDotCase, toKebabCase, toLowerCase, toPascalCase, toPathCase, toSentenceCase, toSnakeCase, toTitleCase, toTrim, toUpperCase };