web/packages/common/utils/url.ts

import { Lang } from "../constants/language"

export function removeMultipleSlashes(pathname: string) {
  return pathname.replaceAll(/\/\/+/g, "/")
}

export function removeTrailingSlash(pathname: string) {
  if (pathname.endsWith("/")) {
    // Remove the trailing slash
    return pathname.slice(0, -1)
  }
  return pathname
}

/**
 * Returns the TLD (top-level domain) for a given language.
 * @param lang - The language to get the TLD for
 * @returns The TLD for the given language
 */
export function getTldForLanguage(lang: Lang): string {
  switch (lang) {
    case Lang.sv:
      return "se"
    case Lang.no:
      return "no"
    case Lang.da:
      return "dk"
    case Lang.fi:
      return "fi"
    case Lang.de:
      return "de"
    default:
      return "com"
  }
}

/**
 * Constructs a URL with the correct TLD (top-level domain) based on lang, for current web.
 * @param params - Object containing path, lang, and baseUrl
 * @param params.path - The path to append to the URL
 * @param params.lang - The language to use for TLD
 * @param params.baseUrl - The base URL to use (e.g. https://www.scandichotels.com)
 * @returns The complete URL with language-specific TLD
 */
export function getCurrentWebUrl({
  path,
  lang,
  baseUrl = "https://www.scandichotels.com", // Fallback for ephemeral environments (e.g. deploy previews).
}: {
  path: string
  lang: Lang
  baseUrl?: string
}): string {
  const tld = getTldForLanguage(lang)
  const url = new URL(path, baseUrl)

  if (tld !== "com") {
    url.host = url.host.replace(".com", `.${tld}`)
  }

  return url.toString()
}