adjust connection settings and lessen indentation un user cotrols

app/Main.hs

@@ -103,7 +103,11 @@ main = do
                   , rsSoftwareVersion = T.pack (showVersion version)
                   }
                 expirationSpec = TimeSpec 5 0 -- five seconds
-            th <- initCustomThrottler (defaultThrottleSettings expirationSpec)
+                throttleSettings = (defaultThrottleSettings expirationSpec)
+                  { throttleSettingsRate   = 10
+                  , throttleSettingsPeriod = 1000
+                  }
+            th <- initCustomThrottler throttleSettings
               (\req ->
                 let headers = requestHeaders req
                 in  case lookup "x-forwarded-for" headers of

src/Control/User.hs

@@ -3,7 +3,7 @@ module Control.User where
 
 import Servant
 
-import Control.Monad (void)
+import Control.Monad (void, when)
 
 import Control.Monad.Reader (asks)
 
@@ -83,9 +83,11 @@ userRecharge
   :: Maybe (Int, AuthMethod)
   -> UserRecharge
   -> MateHandler ()
-userRecharge (Just (auid, _)) (UserRecharge amount) =
-  if amount >= 0
-  then do
+userRecharge (Just (auid, _)) (UserRecharge amount) = do
+  when (amount < 0) $ do
+    throwError $ err400
+      { errBody = "Amounts less or equal zero are not acceptable."
+      }
   conn <- asks rsConnection
   ud <- userDetailsSelect auid conn
   void $ insertNewJournalEntry
@@ -96,10 +98,6 @@ userRecharge (Just (auid, _)) (UserRecharge amount) =
       )
     conn
   void $ addToUserBalance auid amount conn
-  else
-    throwError $ err400
-      { errBody = "Amounts less or equal zero are not acceptable."
-      }
 userRecharge Nothing _ =
   throwError $ err401
     { errBody = "No Authentication present."
@@ -109,42 +107,32 @@ userTransfer
   :: Maybe (Int, AuthMethod)
   -> UserTransfer
   -> MateHandler ()
-userTransfer (Just (auid, method)) (UserTransfer target amount) =
-  if amount >= 0
-  then
-    if auid /= target
-    then
-      if method `elem` [PrimaryPass, ChallengeResponse]
-      then do
-        conn <- asks rsConnection
-        user <- userDetailsSelect auid conn
-        if amount < userDetailsBalance user
-        then do
-          mtarget <- filter (\u -> userSummaryId u == target) <$> userSelect AllUsers conn
-          if not (null mtarget)
-          then do
-            void $ addToUserBalance auid (-amount) conn
-            void $ addToUserBalance target amount conn
-          else
-            throwError $ err400
-              { errBody = "Target user not found."
-              }
-        else
-         throwError $ err400
-           { errBody = "Not enough credit balance."
-           }
-      else
-        throwError $ err400
-          { errBody = "You can not transfer yourself money."
-          }
-    else
-      throwError $ err401
-        { errBody = "No Authentication present."
-        }
-  else
+userTransfer (Just (auid, method)) (UserTransfer target amount) = do
+  when (amount < 0) $ do
     throwError $ err400
       { errBody = "Amounts less or equal zero are not acceptable."
       }
+  when (auid == target) $ do
+    throwError $ err400
+      { errBody = "You can not transfer yourself money."
+      }
+  when (method `notElem` [PrimaryPass, ChallengeResponse]) $ do
+    throwError $ err401
+      { errBody = "No Authentication present."
+      }
+  conn <- asks rsConnection
+  user <- userDetailsSelect auid conn
+  when (amount > userDetailsBalance user) $ do
+    throwError $ err400
+      { errBody = "Not enough credit balance."
+      }
+  mtarget <- filter (\u -> userSummaryId u == target) <$> userSelect AllUsers conn
+  when (null mtarget) $ do
+    throwError $ err400
+      { errBody = "Target user not found."
+      }
+  void $ addToUserBalance auid (-amount) conn
+  void $ addToUserBalance target amount conn
 userTransfer Nothing _ =
   throwError $ err401
     { errBody = "No Authentication present."