@polkadot/util/cjs/string/camelCase.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.stringPascalCase = exports.stringCamelCase = exports.CC_TO_UP = exports.CC_TO_LO = void 0;
// Copyright 2017-2022 @polkadot/util authors & contributors
// SPDX-License-Identifier: Apache-2.0
const CC_TO_UP = new Array(256);
exports.CC_TO_UP = CC_TO_UP;
const CC_TO_LO = new Array(256);
exports.CC_TO_LO = CC_TO_LO;

for (let i = 0; i < CC_TO_UP.length; i++) {
  CC_TO_LO[i] = String.fromCharCode(i).toLowerCase();
  CC_TO_UP[i] = String.fromCharCode(i).toUpperCase();
}
/** @internal */


function formatAllCaps(w) {
  return w.slice(0, w.length - 1).toLowerCase() + CC_TO_UP[w.charCodeAt(w.length - 1)];
}
/**
 * @internal
 *
 * Inspired by https://stackoverflow.com/a/2970667
 *
 * This is not as optimal as the original SO answer (we split into per-word),
 * however it does pass the tests (which the SO version doesn't) and is still
 * a major improvement over the original camelcase npm package -
 *
 *   camelcase: 20.88 μs/op
 *        this:  1.00 μs/op
 *
 * Caveat of this: only Ascii, but acceptable for the intended usecase
 */


function converter(format) {
  return value => {
    const parts = value // replace all seperators (including consequtive) with spaces
    .replace(/[-_., ]+/g, ' ') // we don't want leading or trailing spaces
    .trim() // split into words
    .split(' ');
    const count = parts.length;
    let result = '';

    for (let i = 0; i < count; i++) {
      const w = parts[i]; // apply the formatting

      result += format(/^[\dA-Z]+$/.test(w) // all full uppercase + letters are changed to lowercase
      ? w.toLowerCase() // all consecutive capitals + letters are changed to lowercase
      // e.g. UUID64 -> uuid64, while preserving splits, eg. NFTOrder -> nftOrder
      : w.replace(/^[\dA-Z]{2,}[^a-z]/, formatAllCaps), i);
    }

    return result;
  };
}
/**
 * @name stringCamelCase
 * @summary Convert a dash/dot/underscore/space separated Ascii string/String to camelCase
 */


const stringCamelCase = converter((w, i) => // lowercase for first letter/first word, else uppercase first, rest unchanged
(i ? CC_TO_UP[w.charCodeAt(0)] : CC_TO_LO[w.charCodeAt(0)]) + w.slice(1));
/**
 * @name stringPascalCase
 * @summary Convert a dash/dot/underscore/space separated Ascii string/String to PascalCase
 */

exports.stringCamelCase = stringCamelCase;
const stringPascalCase = converter(w => // uppercase the first character, leave the rest unchanged
CC_TO_UP[w.charCodeAt(0)] + w.slice(1));
exports.stringPascalCase = stringPascalCase;