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module Patch
( Patch,
parse,
render,
)
where
import Control.Exception (throw)
import Data.Text qualified as T
import Exception qualified as E
import Prettyprinter (pretty)
import Prettyprinter qualified as P
import Prettyprinter.Render.Terminal qualified as P
import Text.Diff.Parse qualified as D
import Text.Diff.Parse.Types qualified as D
newtype Patch = Patch
{ fileDeltas :: D.FileDeltas
}
deriving (Show)
parse :: T.Text -> Patch
parse = either (throw . E.InvalidDiff) Patch . D.parseDiff
render :: Patch -> P.Doc P.AnsiStyle
render (Patch {..}) =
P.vsep $ map prettyFileDelta fileDeltas
where
prettyFileDelta (D.FileDelta {..}) = prettyContent fileDeltaContent
prettyContent D.Binary = P.emptyDoc
prettyContent (D.Hunks hunks) = P.vsep (map prettyHunk hunks)
prettyHunk (D.Hunk {..}) = P.vsep $ map prettyLine hunkLines
prettyLine (D.Line {..}) =
case lineAnnotation of
D.Added -> P.annotate (P.color P.Green) $ P.pretty ("+" :: T.Text) <> pretty lineContent
D.Removed -> P.annotate (P.color P.Red) $ P.pretty ("-" :: T.Text) <> pretty lineContent
D.Context -> P.annotate (P.color P.White) $ P.pretty (" " :: T.Text) <> pretty lineContent
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