/**
 * Holds the limits on what users submit, shared so that the forms check the
 * same limits the server enforces.
 *
 * @module
 */

/**
 * Read by the validators and services, which refuse what breaks a limit, and
 * by the forms, which say so before sending. Lengths are JavaScript string
 * lengths, so an emoji may count for two. The category limits are checked on
 * the server only.
 */
export const VALIDATION = {
  USERNAME_MIN: 1,
  USERNAME_MAX: 32,
  PASSWORD_MIN: 8,
  PASSWORD_MAX: 128,
  DUMP_TITLE_MAX: 200,
  /** Applies to a dump's note, which the API calls its comment. */
  DUMP_COMMENT_MAX: 5000,
  PLAYLIST_TITLE_MAX: 100,
  PLAYLIST_DESCRIPTION_MAX: 2000,
  COMMENT_BODY_MAX: 5000,
  USER_DESCRIPTION_MAX: 2000,
  CATEGORY_NAME_MAX: 50,
  CATEGORY_SLUG_MAX: 50,
  CHAT_MESSAGE_MAX: 2000,
} as const;

/**
 * Matches a valid username, made of letters, digits and underscores within the
 * `VALIDATION` limits. Sign-up checks it on both sides. It uses the same `\w`
 * that a mention's pattern reads a name with.
 */
export const USERNAME_RE: RegExp = new RegExp(
  `^[a-zA-Z0-9_]{${VALIDATION.USERNAME_MIN},${VALIDATION.USERNAME_MAX}}$`,
);

/**
 * Matches an email address well enough to catch a typo; only the reset email
 * arriving proves it.
 */
export const EMAIL_RE: RegExp = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;

/**
 * The largest file a file dump may hold, in bytes. dump-service refuses a
 * bigger one, and the create form before uploading it.
 */
export const DUMP_MAX_FILE_SIZE_BYTES: number = 50 * 1024 * 1024;