Add proper !uptime printing

src/EuphApi/Bot.hs

@@ -341,7 +341,7 @@ handleOwnViewStuff (E.HelloEvent view _ _) = do
   liftIO $ atomically $ writeTVar var (Just view)
 handleOwnViewStuff (E.SnapshotEvent _ _ _ (Just curNick)) = do
   var <- asks bOwnView
-  liftIO $ debugM $ "SnapshotEvent reported a nick. This should not happen in a bot."
+  liftIO $ debugM "SnapshotEvent reported a nick. This should not happen in a bot."
   liftIO $ atomically $ changeOwnNick var curNick
 handleOwnViewStuff _ = return ()
 

src/EuphApi/Utils.hs

@@ -8,6 +8,10 @@ module EuphApi.Utils (
   , atMention
   , mentionReduce
   , similar
+  -- * Time manipulation
+  , printUTCTime
+  , printNominalDiffTime
+  , printUptime
   -- * Commands
   , Command
   , CommandName
@@ -31,6 +35,7 @@ import           Data.Function
 import           Data.Void
 
 import qualified Data.Text            as T
+import           Data.Time
 import qualified Text.Megaparsec      as P
 import qualified Text.Megaparsec.Char as P
 
@@ -64,6 +69,35 @@ mentionReduce = T.map toLower . mention
 similar :: T.Text -> T.Text -> Bool
 similar = (==) `on` mentionReduce
 
+{-
+ - Time manipulation
+ -}
+
+printUTCTime :: UTCTime -> String
+printUTCTime = formatTime defaultTimeLocale "%F %T %Z"
+
+printNominalDiffTime :: NominalDiffTime -> String
+printNominalDiffTime n =
+  let nr = abs $ round n :: Integer
+      (w, wr) = nr `quotRem` (60 * 60 * 24 * 7)
+      (d, dr) = wr `quotRem` (60 * 60 * 24    )
+      (h, hr) = dr `quotRem` (60 * 60         )
+      (m, s ) = hr `quotRem`  60
+      ws = if w /= 0 then show w ++ "w " else ""
+      ds = if d /= 0 then show d ++ "d " else ""
+      hs = if h /= 0 then show h ++ "h " else ""
+      ms = if m /= 0 then show m ++ "m " else ""
+      ss =                show s ++ "s"
+      sign = if n < 0 then "-" else ""
+  in  sign ++ ws ++ ds ++ hs ++ ms ++ ss
+
+printUptime :: UTCTime -> UTCTime -> String
+printUptime start now =
+  let diff    = diffUTCTime now start
+      upSince = printUTCTime start
+      upFor   = printNominalDiffTime diff
+  in  "/me has been up since " ++ upSince ++ " (" ++ upFor ++ ")."
+
 {-
  - Commands
  -}

src/EuphApi/Utils/Botrulez.hs

@@ -11,12 +11,14 @@ module EuphApi.Utils.Botrulez
   ) where
 
 import           Control.Monad
+import           Control.Monad.IO.Class
 
-import qualified Data.Text     as T
+import qualified Data.Text              as T
+import           Data.Time
 
-import qualified EuphApi.Bot   as B
-import qualified EuphApi.Types as E
-import qualified EuphApi.Utils as E
+import qualified EuphApi.Bot            as B
+import qualified EuphApi.Types          as E
+import qualified EuphApi.Utils          as E
 
 pingCommand :: E.Command b c
 pingCommand = E.specificCommand "ping" $ \msg ->
@@ -34,13 +36,17 @@ generalHelpCommand :: T.Text -> E.Command b c
 generalHelpCommand helpText = E.command "help" $ \msg ->
   void $ B.reply (E.msgID msg) helpText
 
+uptime :: E.Message -> B.Bot b c ()
+uptime msg = do
+  startTime <- B.getStartTime
+  curTime <- liftIO getCurrentTime
+  void $ B.reply (E.msgID msg) (T.pack $ E.printUptime startTime curTime)
+
 uptimeCommand :: E.Command b c
-uptimeCommand = E.specificCommand "uptime" $ \msg ->
-  void $ B.reply (E.msgID msg) "uptime placeholder"
+uptimeCommand = E.specificCommand "uptime" uptime
 
 generalUptimeCommand :: E.Command b c
-generalUptimeCommand = E.command "uptime" $ \msg ->
-  void $ B.reply (E.msgID msg) "uptime placeholder"
+generalUptimeCommand = E.command "uptime" uptime
 
 killCommand :: E.Command b c
 killCommand = E.specificCommand "kill" $ \msg -> do