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module Daffm.State where
import qualified Brick.Widgets.Edit as Editor
import qualified Brick.Widgets.List as L
import Control.Applicative ((<|>))
import Control.Monad (filterM, forM)
import Daffm.Types (AppState (..), FileInfo (..), FileType (..), FocusTarget (..))
import Data.Char (toLower)
import Data.List (findIndex, sortBy)
import qualified Data.Map.Strict as Map
import Data.Maybe (fromMaybe)
import qualified Data.Set as Set
import qualified Data.Text.Zipper.Generic as Zipper
import qualified Data.Vector as Vec
import System.Directory (listDirectory, makeAbsolute, setCurrentDirectory)
import System.PosixCompat (fileExist)
import qualified System.PosixCompat as Posix
mkEditor :: (Zipper.GenericTextZipper a) => a -> Editor.Editor a FocusTarget
mkEditor = Editor.editor FocusCmdline (Just 1)
mkEmptyAppState :: AppState
mkEmptyAppState =
AppState
{ stateFiles = L.list FocusMain (Vec.fromList []) 1,
stateCmdlineEditor = mkEditor "",
stateFocusTarget = FocusMain,
stateListPositionCache = Map.empty,
stateFileSelections = Set.empty,
stateCwd = "",
stateParentDir = ""
}
toggleSetItem :: (Ord a) => a -> Set.Set a -> Set.Set a
toggleSetItem val set =
if val `Set.member` set then Set.delete val set else Set.insert val set
toggleFileSelection :: FilePath -> AppState -> AppState
toggleFileSelection path st = st {stateFileSelections = toggleSetItem path $ stateFileSelections st}
loadDirToState :: FilePath -> FilePath -> AppState -> IO AppState
loadDirToState dir parentDir appState@(AppState {stateCwd, stateListPositionCache}) = do
setCurrentDirectory dir
files <- listFilesInDir dir
let prevDirPosM = findIndex ((== stateCwd) . filePath) files
let cachedPosM = Map.lookup dir stateListPositionCache
let pos = fromMaybe 0 (cachedPosM <|> prevDirPosM)
let list = L.listMoveTo pos $ L.list FocusMain (Vec.fromList files) 1
pure $
appState
{ stateFiles = list,
stateCwd = dir,
stateParentDir = parentDir
}
fileTypeFromStatus :: Posix.FileStatus -> FileType
fileTypeFromStatus s =
if
| Posix.isBlockDevice s -> BlockDevice
| Posix.isCharacterDevice s -> CharacterDevice
| Posix.isNamedPipe s -> NamedPipe
| Posix.isRegularFile s -> RegularFile
| Posix.isDirectory s -> Directory
| Posix.isSocket s -> UnixSocket
| Posix.isSymbolicLink s -> SymbolicLink
| otherwise -> UnknownFileType
getFileInfo :: FilePath -> IO FileInfo
getFileInfo name = do
path <- makeAbsolute name
stat <- Posix.getSymbolicLinkStatus path
pure $
FileInfo
{ filePath = path,
fileName = name,
fileSize = Posix.fileSize stat,
fileMode = Posix.fileMode stat,
fileType = fileTypeFromStatus stat
}
fileSorter :: FileInfo -> FileInfo -> Ordering
fileSorter (FileInfo {fileType = Directory, fileName = fa}) (FileInfo {fileType = Directory, fileName = fb}) =
compare (toLower <$> fa) (toLower <$> fb)
fileSorter (FileInfo {fileType = Directory}) _ = LT
fileSorter _ (FileInfo {fileType = Directory}) = GT
fileSorter (FileInfo {fileName = fa}) (FileInfo {fileName = fb}) =
compare (toLower <$> fa) (toLower <$> fb)
listFilesInDir :: FilePath -> IO [FileInfo]
listFilesInDir dir = do
files <- listDirectory dir
sortBy fileSorter <$> forM files getFileInfo
cacheDirPosition :: AppState -> AppState
cacheDirPosition appState@(AppState {stateListPositionCache, stateCwd, stateFiles}) =
appState
{ stateListPositionCache = Map.insert stateCwd pos stateListPositionCache
}
where
pos = fromMaybe 0 $ L.listSelected stateFiles
filterInvalidSelections :: AppState -> IO AppState
filterInvalidSelections st = do
selections <- filterM fileExist . Set.elems $ stateFileSelections st
pure $ st {stateFileSelections = Set.fromList selections}
|
