refactor pages

frontend/app/Route.hs

@@ -0,0 +1,30 @@
+module Route
+  ( Route (..),
+    parseURI,
+  )
+where
+
+import Data.Attoparsec.Text qualified as P
+import Data.Default
+import Data.Text qualified as T
+import Miso
+
+data Route
+  = Home
+  | ListCollection String
+  deriving (Show, Eq)
+
+instance Default Route where
+  def = Home
+
+parseURI :: URI -> Route
+parseURI uri =
+  either (const def) id $
+    P.parseOnly
+      ( P.choice
+          [ ListCollection <$> (P.string "#collection/" *> P.many1 P.anyChar),
+            pure Home
+          ]
+          <* P.endOfInput
+      )
+      (T.pack uri.uriFragment)