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{-# OPTIONS_GHC -Wno-unrecognised-pragmas #-}
{-# HLINT ignore "Redundant multi-way if" #-}
{-# HLINT ignore "Use if" #-}
module Daffm.State where
import qualified Brick.Widgets.Edit as Editor
import qualified Brick.Widgets.List as L
import Control.Applicative ((<|>))
import Control.Exception (try)
import Control.Monad (filterM, forM)
import Daffm.Types
import Daffm.Utils (trim)
import Data.Either (fromRight)
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 as Text
import qualified Data.Text.Zipper.Generic as Zipper
import qualified Data.Vector as Vec
import System.Directory (doesPathExist, getCurrentDirectory, getHomeDirectory, getPermissions, getSymbolicLinkTarget, listDirectory, makeAbsolute, readable, setCurrentDirectory)
import System.FilePath (joinPath, takeDirectory)
import qualified System.Posix.User as Posix
import qualified System.PosixCompat as Posix
mkEditor :: (Zipper.GenericTextZipper a) => a -> Editor.Editor a FocusTarget
mkEditor = Editor.editor FocusCmdline (Just 1)
mkEmptyAppState :: Configuration -> AppState
mkEmptyAppState config =
applyConfigToState config $
AppState
{ stateFiles = L.list FocusMain (Vec.fromList []) 1,
stateMessage = Nothing,
stateCmdlineEditor = mkEditor "",
stateFocusTarget = FocusMain,
stateListPositionHistory = Map.empty,
stateFileSelections = Set.empty,
stateCwd = "",
stateKeyMap = Map.empty,
stateOpenerScript = Nothing,
stateKeySequence = [],
stateSearchTerm = Nothing,
stateSearchMatches = Vec.empty,
stateCustomCommands = Map.empty,
stateSearchIndex = 0
}
applyConfigToState :: Configuration -> AppState -> AppState
applyConfigToState config state =
state
{ stateKeyMap = configKeymap config,
stateOpenerScript = configOpener config,
stateCustomCommands = configCommands config
}
toggleSetItem :: (Ord a) => a -> Set.Set a -> Set.Set a
toggleSetItem val set
| Set.member val set = Set.delete val set
| otherwise = Set.insert val set
toggleFileSelection :: FilePathText -> AppState -> AppState
toggleFileSelection path st = st {stateFileSelections = toggleSetItem path $ stateFileSelections st}
normalizePath :: FilePathText -> IO FilePathText
normalizePath "~" = Text.pack <$> getHomeDirectory
normalizePath (Text.stripPrefix "~/" -> (Just rest)) = do
home <- getHomeDirectory
pure . Text.pack . joinPath $ [home, Text.unpack rest]
normalizePath dir = Text.pack <$> makeAbsolute (Text.unpack dir)
withCwdFallback :: FilePathText -> IO (Bool, FilePathText)
withCwdFallback path = do
exists <- doesPathExist $ Text.unpack path
if exists then pure (True, path) else (False,) . Text.pack <$> getCurrentDirectory
stripQuotes :: Text.Text -> Text.Text
stripQuotes txt = fromMaybe txt (double <|> single)
where
double = Text.stripPrefix "\"" txt >>= Text.stripSuffix "\""
single = Text.stripPrefix "'" txt >>= Text.stripSuffix "'"
stripTrailingSlash :: Text.Text -> Text.Text
stripTrailingSlash path@"/" = path
stripTrailingSlash path = fromMaybe path $ Text.stripSuffix "/" path
textAsString :: (String -> String) -> Text.Text -> Text.Text
textAsString f = Text.pack . f . Text.unpack
loadDirToState :: FilePathText -> AppState -> IO AppState
loadDirToState dir' appState@(AppState {stateCwd, stateListPositionHistory}) = do
(pathExists, normalizedDir) <- (normalizePath . stripTrailingSlash . stripQuotes . trim) dir' >>= withCwdFallback
stat <- Posix.getFileStatus $ Text.unpack normalizedDir
let (dir, targetFilePath) =
if Posix.isDirectory stat
then (normalizedDir, Nothing)
else (textAsString takeDirectory normalizedDir, Just normalizedDir)
isReadable <- readable <$> getPermissions (Text.unpack dir)
if isReadable
then do
setCurrentDirectory $ Text.unpack dir
newState <- dirToAppState dir targetFilePath
pure $ case pathExists of
True -> newState
_ -> newState {stateMessage = Just $ "No such file or directory: " <> dir'}
else do
let list = L.list FocusMain (Vec.fromList []) 1
pure $ (withNewDir dir list appState) {stateMessage = Just "Unable to read directory"}
where
withNewDir dir fileList st =
st
{ stateCwd = dir,
stateFiles = fileList,
stateMessage = Nothing,
stateSearchIndex = 0,
stateSearchMatches = Vec.empty
}
dirToAppState dir targetFilePath = do
files <- listFilesInDir dir
let prevDirPos = findIndex ((== stateCwd) . filePath) files
let cachedPos = Map.lookup dir stateListPositionHistory
let targetFilePos = targetFilePath >>= \target -> findIndex ((== target) . filePath) files
let pos = fromMaybe 0 (targetFilePos <|> cachedPos <|> prevDirPos)
let list = L.listMoveTo pos $ L.list FocusMain (Vec.fromList files) 1
pure $ withNewDir dir list appState
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 :: FilePathText -> IO FileInfo
getFileInfo name = do
path <- makeAbsolute $ Text.unpack name
stat <- Posix.getSymbolicLinkStatus path
let either2Maybe :: Either IOError a -> Maybe a
either2Maybe = either (const Nothing) Just
linkStat <- either2Maybe <$> try (Posix.getFileStatus path)
linkTarget <-
if
| Posix.isSymbolicLink stat -> Just . Text.pack <$> getSymbolicLinkTarget path
| otherwise -> pure Nothing
user <- either2Maybe <$> try (Posix.getUserEntryForID $ Posix.fileOwner stat)
group <- either2Maybe <$> try (Posix.getGroupEntryForID $ Posix.fileGroup stat)
pure $
FileInfo
{ filePath = Text.pack path,
fileName = name,
fileSize = Posix.fileSize stat,
fileMode = Posix.fileMode stat,
fileUser = maybe "?" (Text.pack . Posix.userName) user,
fileGroup = maybe "?" (Text.pack . Posix.groupName) group,
fileType = fileTypeFromStatus stat,
fileLinkType = fileTypeFromStatus <$> linkStat,
fileLinkTarget = linkTarget
}
fileSorter :: FileInfo -> FileInfo -> Ordering
fileSorter
(FileInfo {fileType = Directory, fileName = fa})
(FileInfo {fileType = Directory, fileName = fb}) =
compare (Text.toLower fa) (Text.toLower fb)
fileSorter
(FileInfo {fileType = SymbolicLink, fileLinkType = Just Directory, fileName = fa})
(FileInfo {fileType = SymbolicLink, fileLinkType = Just Directory, fileName = fb}) =
compare (Text.toLower fa) (Text.toLower fb)
fileSorter (FileInfo {fileType = Directory}) (FileInfo {fileType = SymbolicLink, fileLinkType = Just Directory}) = LT
fileSorter (FileInfo {fileType = SymbolicLink, fileLinkType = Just Directory}) (FileInfo {fileType = Directory}) = GT
fileSorter (FileInfo {fileType = Directory}) _ = LT
fileSorter _ (FileInfo {fileType = Directory}) = GT
fileSorter (FileInfo {fileLinkType = Just Directory}) _ = LT
fileSorter _ (FileInfo {fileLinkType = Just Directory}) = GT
fileSorter (FileInfo {fileName = fa}) (FileInfo {fileName = fb}) =
compare (Text.toLower fa) (Text.toLower fb)
listFilesInDir :: FilePathText -> IO [FileInfo]
listFilesInDir dir = do
files <- listDirectory (Text.unpack dir)
sortBy fileSorter <$> forM files (getFileInfo . Text.pack)
cacheDirPosition :: AppState -> AppState
cacheDirPosition appState@(AppState {stateListPositionHistory, stateCwd, stateFiles}) =
appState {stateListPositionHistory = Map.insert stateCwd pos stateListPositionHistory}
where
pos = fromMaybe 0 $ L.listSelected stateFiles
filterInvalidSelections :: AppState -> IO AppState
filterInvalidSelections st = do
selections <- filterM (Posix.fileExist . Text.unpack) . Set.elems $ stateFileSelections st
pure $ st {stateFileSelections = Set.fromList selections}
|
