{-
Copyright (C) 2022 Yuchen Pei.

This file is part of fsd.

fsd is free software: you can redistribute it and/or modify it under
the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

fsd is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General
Public License for more details.

You should have received a copy of the GNU Affero General Public
License along with fsd.  If not, see <https://www.gnu.org/licenses/>.

-}

{-# LANGUAGE ImportQualifiedPost #-}
{-# LANGUAGE OverloadedStrings #-}

module FSD.Source where

import FSD.Control
import Data.List.Extra
import Data.Maybe
import Data.Text qualified as T
import Debian.Control
import FSD.Types

getSource :: Paragraph -> Maybe Source
getSource para = do
  package <- simpleFV <$> fieldValue "Package" para
  version <- simpleFV <$> fieldValue "Version" para
  fileLines <- lbListFV <$> fieldValue "Files" para
  -- normally the 2nd file is the orig one
  fileLine <- fileLines !? 2
  file <- (T.splitOn " " fileLine) !? 2
  let homepage = simpleFV <$> fieldValue "Homepage" para
  return $ Source package version file homepage

getSources :: Control -> [Source]
getSources = catMaybes . fmap getSource . unControl