enum SsnDiffType {
  /** We included the original file contents, not just the differences, because file is new or it's in a format that's not suitable for diffing. */
  NewFile = 0,
  /** File is not included in the .zip archive because it has been deleted. */
  Deleted = 1,
  /** File has changed and we include the differences, encoded in vcdiff/xdelta3 */
  Changed = 2,
  /** File is not included in the .zip archive because it hasn't changed */
  Unchanged = 3,
}

interface ISsnFileEntry {
  /** CRC-32 checksum of this file. */
  crc: number;
  /** If we only store the differences, the size of the destination file. */
  diffDestLength: number;
  /** If we only store the differences, the size of the source file. */
  diffSourceLength: number;
  /** Whether this file was changed or not, or whether it was newly added or deleted. */
  diffType: SsnDiffType;
  /** The date and time when this file was last modified. */
  lastMod: Date;
  /** File name */
  name: string;
  /** Uncompressed size */
  size: number;
  /** Compressed size */
  comprSize: number;
  /** Decryption keys needed to decrypt the file */
  decryptionKeys: [number, number, number] | undefined;
  /** Number of the disk where the file is stored (0=.z01, 1=.z02 etc.) */
  diskNumberStart: number;
  /** Offset */
  offset: number;
}

export default ISsnFileEntry;