{-# LANGUAGE PackageImports, ScopedTypeVariables, TupleSections #-}
{-# OPTIONS -fno-warn-name-shadowing #-}
module Debian.Repo.Package.Internal.ParseSourceParagraph
    ( parseSourceParagraph
    ) where

import Debian.Control (ControlFunctions(stripWS))
import qualified Debian.Control.Text as B (fieldValue, Paragraph)
import Debian.Repo.Types.PackageIndex (SourceControl(..))

parseSourceParagraph :: B.Paragraph -> Either [String] SourceControl
parseSourceParagraph p =
    -- Look up the required fields
    case (B.fieldValue "Package" p,
          B.fieldValue "Maintainer" p) of
      (Just source', Just maintainer') ->
          -- The optional fields can be parsed as pure values
          Right (SourceControl
                  { source = source'
                  , maintainer = maintainer'
                  , uploaders = maybe [] (: []) $ B.fieldValue "Uploaders" p
                  , packageSection = fmap stripWS $ B.fieldValue "Section" p
                  , packagePriority = fmap stripWS $ B.fieldValue "Priority" p
                  , buildDepends = maybe [] (: []) $ B.fieldValue "Build-Depends" p
                  , buildDependsIndep = maybe [] (: []) $ B.fieldValue "Build-Depends-Indep" p
                  , buildConflicts = maybe [] (: []) $ B.fieldValue "Build-Conflicts" p
                  , buildConflictsIndep = maybe [] (: []) $ B.fieldValue "Build-Conflicts-Indep" p
                  , standardsVersion = fmap stripWS $ B.fieldValue "Standards-Version" p
                  , homepage = fmap stripWS $ B.fieldValue "Homepage" p })
      _x -> Left ["parseSourceParagraph - One or more required fields (Package, Maintainer, Standards-Version) missing: " ++ show p]