upperCase.ts

import { LanguageSpecific } from "./types.ts";

const LANGUAGES: LanguageSpecific = {
  tr: {
    regexp: /[\u0069]/g,
    map: {
      i: "\u0130",
    },
  },
  az: {
    regexp: /[\u0069]/g,
    map: {
      i: "\u0130",
    },
  },
  lt: {
    regexp: /[\u0069\u006A\u012F]\u0307|\u0069\u0307[\u0300\u0301\u0303]/g,
    map: {
      i̇: "\u0049",
      j̇: "\u004A",
      į̇: "\u012E",
      i̇̀: "\u00CC",
      i̇́: "\u00CD",
      i̇̃: "\u0128",
    },
  },
};

/**
 * Convert a `string` to upper case.
 *
 * Example:
 *
 * ```ts
 * upperCase("test string");
 * //=> "TEST STRING"
 * ```
 */
export default function (str: string, locale?: string): string {
  str = str == null ? "" : String(str);

  if (!locale) {
    return str.toUpperCase();
  }

  const lang = LANGUAGES[locale];

  if (lang) {
    str = str.replace(lang.regexp, function (m) {
      return lang.map[m];
    });
  }

  return str.toUpperCase();
}