add basic caching of Issue's

1 files changed, 10 insertions, 2 deletions

diff --git a/app/Issue.hs b/app/Issue.hs
index ba8baa8..f7227f1 100644
--- a/app/Issue.hs
+++ b/app/Issue.hs
@@ -1,10 +1,12 @@
 {-# LANGUAGE BlockArguments #-}
+{-# LANGUAGE DeriveAnyClass #-}
 {-# LANGUAGE DisambiguateRecordFields #-}
 {-# LANGUAGE OverloadedRecordDot #-}
 {-# LANGUAGE OverloadedStrings #-}
 
 module Issue (Issue (..), Provenance (..), fromMatch, id) where
 
+import Data.Binary (Binary, get, put)
 import Data.ByteString.Lazy (toStrict)
 import Data.ByteString.Lazy.Char8 (unpack)
 import Data.List (find, foldl')
@@ -13,6 +15,7 @@ import Data.Text (Text)
 import Data.Text qualified as T
 import Data.Text.Encoding (decodeUtf8)
 import Data.Time.Clock (UTCTime)
+import GHC.Generics (Generic)
 import Issue.Tag (Tag (..))
 import Issue.Tag qualified as I
 import Issue.Text qualified as I
@@ -34,7 +37,7 @@ data Issue = Issue
     tags :: [Tag],
     internalTags :: [Tag]
   }
-  deriving (Show)
+  deriving (Show, Binary, Generic)
 
 data Provenance = Provenance
   { firstCommit :: Text,
@@ -42,7 +45,12 @@ data Provenance = Provenance
     authorEmail :: Text,
     authorName :: Text
   }
-  deriving (Show)
+  deriving (Show, Generic, Binary)
+
+instance Binary UTCTime where
+  -- TODO Serialize UTCTime using POSIX time stamps
+  put = put . show
+  get = fmap read get
 
 id :: Issue -> Maybe String
 id issue =