compiler: make absent file names more explicit

5 files changed, 65 insertions, 52 deletions

diff --git a/compiler/src/Compiler.hs b/compiler/src/Compiler.hs
index 4f2093b..5d30a26 100644
--- a/compiler/src/Compiler.hs
+++ b/compiler/src/Compiler.hs
@@ -1,7 +1,7 @@
 -- ldgallery - A static generator which turns a collection of tagged
 --             pictures into a searchable web gallery.
 --
--- Copyright (C) 2019  Pacien TRAN-GIRARD
+-- Copyright (C) 2019-2020  Pacien TRAN-GIRARD
 --
 -- This program is free software: you can redistribute it and/or modify
 -- it under the terms of the GNU Affero General Public License as
@@ -20,6 +20,7 @@
     DuplicateRecordFields
   , DeriveGeneric
   , DeriveAnyClass
+  , NamedFieldPuns
 #-}
 
 module Compiler
@@ -30,7 +31,7 @@ module Compiler
 import Control.Monad (liftM2)
 import Data.Function ((&))
 import Data.List (any)
-import Data.Maybe (isJust)
+import Data.Maybe (isJust, fromMaybe)
 import Text.Regex (Regex, mkRegex, matchRegex)
 import System.FilePath ((</>))
 
@@ -80,15 +81,15 @@ galleryDirFilter excludeRegex =
     (&&&) = liftM2 (&&)
     (|||) = liftM2 (||)
 
-    isConfigFile = (galleryConf ==) . nodeName
+    matchName :: (FileName -> Bool) -> FSNode -> Bool
+    matchName cond = maybe False cond . nodeName
 
-    isGalleryIndex = (indexFile ==)
-    isViewerIndex = (viewerMainFile ==)
-    containsOutputGallery (File _) = False
-    containsOutputGallery (Dir _ items) =
-      any ((isGalleryIndex ||| isViewerIndex) . nodeName) items
-
-    excludedName = isJust . matchRegex excludeRegex . nodeName
+    isConfigFile = matchName (== galleryConf)
+    isGalleryIndex = matchName (== indexFile)
+    isViewerIndex = matchName (== viewerMainFile)
+    containsOutputGallery File{} = False
+    containsOutputGallery Dir{items} = any (isGalleryIndex ||| isViewerIndex) items
+    excludedName = isJust . matchRegex excludeRegex . fromMaybe "" . nodeName
 
 
 compileGallery :: FilePath -> FilePath -> Bool -> IO ()
diff --git a/compiler/src/Files.hs b/compiler/src/Files.hs
index a658ded..53f9c9e 100644
--- a/compiler/src/Files.hs
+++ b/compiler/src/Files.hs
@@ -1,7 +1,7 @@
 -- ldgallery - A static generator which turns a collection of tagged
 --             pictures into a searchable web gallery.
 --
--- Copyright (C) 2019  Pacien TRAN-GIRARD
+-- Copyright (C) 2019-2020  Pacien TRAN-GIRARD
 --
 -- This program is free software: you can redistribute it and/or modify
 -- it under the terms of the GNU Affero General Public License as
@@ -25,10 +25,10 @@
 module Files
   ( FileName, LocalPath, WebPath, Path
   , (</>), (</), (/>), (<.>)
-  , fileName, maybeFileName, subPaths, pathLength
+  , fileName, subPaths, pathLength
   , localPath, webPath
   , FSNode(..), AnchoredFSNode(..)
-  , nodePath, nodeName, isHidden, flattenDir, filterDir
+  , nodeName, isHidden, flattenDir, filterDir
   , readDirectory, copyTo
   , ensureParentDir, remove, isOutdated
   ) where
@@ -81,12 +81,9 @@ file /> (Path path) = Path (path ++ [file])
 (Path (filename:pathto)) <.> ext =
   Path $ System.FilePath.addExtension filename ext : pathto
 
-fileName :: Path -> FileName
-fileName (Path (name:_)) = name
-
-maybeFileName :: Path -> Maybe FileName
-maybeFileName (Path (name:_)) = Just name
-maybeFileName _ = Nothing
+fileName :: Path -> Maybe FileName
+fileName (Path (name:_)) = Just name
+fileName _ = Nothing
 
 subPaths :: Path -> [Path]
 subPaths (Path path) = map Path $ subsequences path
@@ -101,21 +98,25 @@ webPath :: Path -> WebPath
 webPath (Path path) = System.FilePath.Posix.joinPath $ reverse path
 
 
-data FSNode = File Path | Dir Path [FSNode] deriving Show
+data FSNode =
+    File { path :: Path }
+  | Dir { path :: Path, items :: [FSNode] }
+  deriving Show
+
 data AnchoredFSNode = AnchoredFSNode
   { anchor :: LocalPath
-  , root :: FSNode } deriving Show
+  , root :: FSNode }
+  deriving Show
 
-nodePath :: FSNode -> Path
-nodePath (File path) = path
-nodePath (Dir path _) = path
-
-nodeName :: FSNode -> FileName
-nodeName = fileName . nodePath
+nodeName :: FSNode -> Maybe FileName
+nodeName = fileName . path
 
 isHidden :: FSNode -> Bool
-isHidden node = "." `isPrefixOf` filename &&length filename > 1
-  where filename = nodeName node
+isHidden = hiddenName . nodeName
+  where
+    hiddenName :: Maybe FileName -> Bool
+    hiddenName Nothing = False
+    hiddenName (Just filename) = "." `isPrefixOf` filename && length filename > 1
 
 -- | DFS with intermediate dirs first.
 flattenDir :: FSNode -> [FSNode]
diff --git a/compiler/src/Input.hs b/compiler/src/Input.hs
index 2e11ebe..7e1b169 100644
--- a/compiler/src/Input.hs
+++ b/compiler/src/Input.hs
@@ -1,7 +1,7 @@
 -- ldgallery - A static generator which turns a collection of tagged
 --             pictures into a searchable web gallery.
 --
--- Copyright (C) 2019  Pacien TRAN-GIRARD
+-- Copyright (C) 2019-2020  Pacien TRAN-GIRARD
 --
 -- This program is free software: you can redistribute it and/or modify
 -- it under the terms of the GNU Affero General Public License as
@@ -20,6 +20,7 @@
     DuplicateRecordFields
   , DeriveGeneric
   , DeriveAnyClass
+  , NamedFieldPuns
 #-}
 
 module Input
@@ -92,7 +93,7 @@ readInputTree :: AnchoredFSNode -> IO InputTree
 readInputTree (AnchoredFSNode anchor root@Dir{}) = mkDirNode root
   where
     mkInputNode :: FSNode -> IO (Maybe InputTree)
-    mkInputNode (File path) | not (sidecarExt `isExtensionOf` (fileName path)) =
+    mkInputNode file@File{path} | not $ isSidecar file =
       readSidecarFile (localPath $ anchor /> path <.> sidecarExt)
       >>= return . InputFile path
       >>= return . Just
@@ -104,10 +105,19 @@ readInputTree (AnchoredFSNode anchor root@Dir{}) = mkDirNode root
       mapM mkInputNode items
       >>= return . catMaybes
       >>= return . InputDir path (findThumbnail items)
-      where
-        findThumbnail :: [FSNode] -> Maybe Path
-        findThumbnail = (fmap nodePath) . (find matchThumbnail)
 
-        matchThumbnail :: FSNode -> Bool
-        matchThumbnail Dir{} = False
-        matchThumbnail (File path) = (dropExtension $ fileName path) == "thumbnail"
+    isSidecar :: FSNode -> Bool
+    isSidecar Dir{} = False
+    isSidecar File{path} =
+      fileName path
+      & (maybe False $ isExtensionOf sidecarExt)
+
+    isThumbnail :: FSNode -> Bool
+    isThumbnail Dir{} = False
+    isThumbnail File{path} =
+      fileName path
+      & fmap dropExtension
+      & (maybe False ("thumbnail" ==))
+
+    findThumbnail :: [FSNode] -> Maybe Path
+    findThumbnail = (fmap Files.path) . (find isThumbnail)
diff --git a/compiler/src/Processors.hs b/compiler/src/Processors.hs
index dab9aaa..2525af4 100644
--- a/compiler/src/Processors.hs
+++ b/compiler/src/Processors.hs
@@ -1,7 +1,7 @@
 -- ldgallery - A static generator which turns a collection of tagged
 --             pictures into a searchable web gallery.
 --
--- Copyright (C) 2019  Pacien TRAN-GIRARD
+-- Copyright (C) 2019-2020  Pacien TRAN-GIRARD
 --
 -- This program is free software: you can redistribute it and/or modify
 -- it under the terms of the GNU Affero General Public License as
@@ -60,16 +60,17 @@ data Format =
   | Unknown
 
 formatFromPath :: Path -> Format
-formatFromPath = aux . (map toLower) . takeExtension . fileName
+formatFromPath = maybe Unknown fromExt . fmap (map toLower) . fmap takeExtension . fileName
   where
-    aux ".bmp" = Bmp
-    aux ".jpg" = Jpg
-    aux ".jpeg" = Jpg
-    aux ".png" = Png
+    fromExt :: String -> Format
+    fromExt ".bmp" = Bmp
+    fromExt ".jpg" = Jpg
+    fromExt ".jpeg" = Jpg