[haskell] implemented ship refueling

haskell/src/SpaceTraders/APIClient/Ships.hs

@@ -6,6 +6,7 @@ module SpaceTraders.APIClient.Ships
   ( dock
   , myShips
   , orbit
+  , refuel
   ) where
 
 import           Data.Aeson.Types
@@ -16,7 +17,10 @@ import           Network.HTTP.Simple
 import           SpaceTraders
 import           SpaceTraders.APIClient.Client
 import           SpaceTraders.APIClient.Pagination
+import           SpaceTraders.Database.Agents
 import           SpaceTraders.Database.Ships
+import qualified SpaceTraders.Model.Agent
+import           SpaceTraders.Model.Fuel
 import           SpaceTraders.Model.Nav
 import           SpaceTraders.Model.Ship
 
@@ -62,3 +66,27 @@ orbit ship = if isInOrbit ship then pure (Right ship) else orbit'
           let s = ship{SpaceTraders.Model.Ship.nav=n}
           setShip s
           return $ Right s
+
+data RefuelMessage = RefuelMessage { agent :: SpaceTraders.Model.Agent.Agent
+                                   , fuel  :: Fuel
+                                   } deriving (FromJSON, Generic, Show)
+
+refuel :: Ship -> SpaceTradersT (APIResponse Ship)
+refuel ship = if overNinetyPercentFuel ship then pure (Right ship) else refuel'
+  where
+    refuel' = do
+      resp <- dock ship
+      case resp of
+        (Left e)      -> return $ Left e
+        (Right ship') -> refuel'' ship'
+    refuel'' ship' = do
+      -- TODO check if we are at a marketplace, that sells fuel
+      resp' <- send $ setRequestPath (T.encodeUtf8 $ mconcat ["/v2/my/ships/", symbol ship, "/refuel"])
+                    . setRequestMethod "POST" :: SpaceTradersT (APIResponse RefuelMessage)
+      case resp' of
+        Left e -> return $ Left e
+        Right (RefuelMessage a f) -> do
+          setAgent a
+          let s = ship'{SpaceTraders.Model.Ship.fuel=f}
+          setShip s
+          return $ Right s

haskell/src/SpaceTraders/Model/Ship.hs

@@ -6,6 +6,7 @@ module SpaceTraders.Model.Ship
   ( Ship(..)
   , isDocked
   , isInOrbit
+  , overNinetyPercentFuel
   ) where
 
 import           Data.Aeson
@@ -40,3 +41,10 @@ isDocked ship = status (nav ship) == "DOCKED"
 
 isInOrbit :: Ship -> Bool
 isInOrbit = not . isDocked
+
+overNinetyPercentFuel :: Ship -> Bool
+overNinetyPercentFuel ship = curr * 10 > capa * 9
+  where
+    curr = current f
+    capa = SpaceTraders.Model.Fuel.capacity f
+    f = fuel ship