cleanup a little

make-pages/RSS.hs

@@ -10,6 +10,7 @@ import Data.Function (on)
 import qualified Data.Text as Strict
 import qualified Data.Text.Lazy as Lazy
 import System.FilePath (takeDirectory)
+import Control.Monad
 
 
 make :: Strict.Text    -- ^ website root e.g. @https://gallery.niss.website@
@@ -47,9 +48,9 @@ make' root name ginfo@(GalleryInfo {title, desc, prefix}) output infos = [b|@0
     Just o  -> [b|<link href="$link/$o" rel="self" />|]
 
 makeItem :: Strict.Text -> FilePath -> Bool -> FilePath -> Info -> Builder
-makeItem root prefix nsfw path i@(Info {title, artist}) = [b|@4
+makeItem root prefix nsfw path info@(Info {title}) = [b|@4
     <item>
-      <title>$title$suf</title>
+      <title>$title$suffix</title>
       <link>$link</link>
       <guid>$link</guid>
       $body
@@ -57,46 +58,39 @@ makeItem root prefix nsfw path i@(Info {title, artist}) = [b|@4
     </item>
   |]
  where
-  suf  = let parts = catMaybes [o18, cnt, up] in
-         if null parts then ""
+  body = [b|@6
+      <description> <![CDATA[
+        $8.image
+        $8.artist
+        $8.desc
+      ]]> </description>
+    |]
+
+  suffix = if null parts then ""
            else " (" <> mconcat (intersperse ", " parts) <> ")"
-  up   = if hasUpdatesFor nsfw i then Just "updated" else Nothing
-  o18  = if nsfw && anyNsfw i then Just "🔞" else Nothing
-  cnt  = let len = maybe 0 length $ allImages <$> imagesFor nsfw i in
-         if len == 1 then Nothing else Just [b|$len images|]
+  parts = catMaybes [o18, cnt, up]
+  up   = do guard $ hasUpdatesFor nsfw info; Just "updated"
+  o18  = do guard $ nsfw && anyNsfw info; Just "🔞"
+  cnt  = do let len = maybe 0 length $ allImages <$> imagesFor nsfw info
+            guard $ len /= 1; Just [b|$len images|]
 
   dir  = takeDirectory path
   link = [b|$root/$prefix/$dir|]
 
-  date = formatRSS $ latestDateFor nsfw i
-  artist' = ifJust artist \case
-    Artist {name, url = Nothing}  -> [b|<p>by $name|]
-    Artist {name, url = Just url} -> [b|<p>by <a href="$url">$name</a>|]
-  desc = descFor nsfw i
-  desc' = makeDesc desc
+  date = formatRSS $ latestDateFor nsfw info
+  artist = ifJust info.artist \case
+    Artist name Nothing    -> [b|<p>by $name|]
+    Artist name (Just url) -> [b|<p>by <a href="$url">$name</a>|]
+  desc = makeDesc $ descFor nsfw info
 
-  body = [b|@6
-      <description> <![CDATA[
-        $8.image
-        $8.artist'
-        $8.desc'
-      ]]> </description>
-    |]
-
-  image = case previewImage i of
-      Just (PFull img) -> go $ pageFile img
-      Just (PThumb th) -> go $ thumbFile th
+  image = case previewImage info of
+    Just (PFull img) -> figure $ pageFile img
+    Just (PThumb th) -> figure $ thumbFile th
     Nothing          -> ""
-    where go p = [b|@0
-        <figure>
-          <a href="$link"><img src="$link/$p"></a>
-        </figure>
-      |]
+  figure p = [b|<figure> <a href="$link"><img src="$link/$p"></a> </figure>|]
 
 makeDesc :: Desc -> Builder
 makeDesc NoDesc = ""
 makeDesc (TextDesc txt) = [b|$txt|]
 makeDesc (LongDesc fs) = [b|<dl>$fields</dl>|]
- where
-  fields = map makeField fs
-  makeField (DescField {name, text}) = [b|<dt>$name <dd>$text|]
+  where fields = map (\(DescField {name, text}) -> [b|<dt>$name <dd>$text|]) fs