[haskell] implemented ships's availability tracking in the database

haskell/src/SpaceTraders/Automation/Init.hs

@@ -20,6 +20,7 @@ import SpaceTraders.APIClient.Ships
 import SpaceTraders.Database
 import SpaceTraders.Database.Agents
 import SpaceTraders.Database.Contracts
+import SpaceTraders.Database.Ships
 import SpaceTraders.Database.Tokens
 
 deinitST :: Env -> IO ()
@@ -53,6 +54,7 @@ registerST = do
     Right r' -> do
       addAgent $ agent r'
       addContract $ contract r'
+      addShip $ ship r'
       _ <- myShips -- in order to fetch the starting probe that is not advertised in the register message
       let t = token r'
       addToken t

haskell/src/SpaceTraders/Database/000_init.sql

@@ -15,7 +15,8 @@ CREATE TABLE contracts (
 );
 CREATE TABLE ships (
   id INTEGER PRIMARY KEY,
-  data TEXT NOT NULL
+  data TEXT NOT NULL,
+  available DATE NOT NULL
 );
 CREATE UNIQUE INDEX ships_data_symbol ON ships (json_extract(data, '$.symbol'));
 CREATE TABLE systems (

haskell/src/SpaceTraders/Database/Ships.hs

@@ -9,6 +9,8 @@ module SpaceTraders.Database.Ships
 
 import Control.Monad.Reader
 import Data.Aeson
+import Data.Time
+import Data.Time.Format.ISO8601
 import qualified Database.SQLite.Simple as S
 
 import SpaceTraders
@@ -16,7 +18,9 @@ import SpaceTraders.Model.Ship
 import SpaceTraders.Utils
 
 addShip :: (HasDatabaseConn env, MonadIO m, MonadReader env m) => Ship -> m ()
-addShip ship = execute "INSERT INTO ships(data) VALUES (json(?));" (S.Only $ encode ship)
+addShip ship = do
+  t <- liftIO getCurrentTime
+  execute "INSERT INTO ships(data, available) VALUES (json(?), ?);" (encode ship, iso8601Show t)
 
 getShips :: (HasDatabaseConn env, MonadIO m, MonadReader env m) => m [Ship]
 getShips = query_ "SELECT data FROM ships;"
@@ -25,7 +29,8 @@ setShip :: (HasDatabaseConn env, MonadFail m, MonadIO m, MonadReader env m) => S
 setShip ship = do
   c <- count "SELECT count(id) FROM ships WHERE data->>'symbol' = ?;" (S.Only $ symbol ship)
   if c == 0 then addShip ship
-            else updateShip ship
+            else updateShip ship Nothing
 
-updateShip :: (HasDatabaseConn env, MonadIO m, MonadReader env m) => Ship -> m ()
-updateShip ship = execute "UPDATE ships SET data = json(?) WHERE data->>'symbol' = ?;" (encode ship, symbol ship)
+updateShip :: (HasDatabaseConn env, MonadIO m, MonadReader env m) => Ship -> Maybe UTCTime -> m ()
+updateShip ship (Just time) = execute "UPDATE ships SET data = json(?), available = ? WHERE data->>'symbol' = ?;" (encode ship, iso8601Show time, symbol ship)
+updateShip ship Nothing = execute "UPDATE ships SET data = json(?) WHERE data->>'symbol' = ?;" (encode ship, symbol ship)

haskell/src/SpaceTraders/Utils.hs

@@ -22,6 +22,12 @@ import qualified Database.SQLite.Simple as S
 
 import SpaceTraders
 
+count :: (HasDatabaseConn env, MonadFail m, MonadReader env m, MonadIO m, S.ToRow t) => S.Query -> t -> m Int
+count q t = do
+  env <- ask
+  [[ret]] <- liftIO (S.query (getConn env) q t :: IO [[Int]])
+  return ret
+
 decodeText :: FromJSON a => T.Text -> Maybe a
 decodeText = decode . B.toLazyByteString . T.encodeUtf8Builder
 
@@ -39,12 +45,6 @@ int2ByteString = B.pack . map B.c2w . show
 one_ :: (FromJSON b, HasDatabaseConn env, MonadReader env m, MonadIO m) => S.Query -> m b
 one_ q = query_ q >>= pure . head
 
-count :: (HasDatabaseConn env, MonadFail m, MonadReader env m, MonadIO m, S.ToRow t) => S.Query -> t -> m Int
-count q t = do
-  env <- ask
-  [[ret]] <- liftIO (S.query (getConn env) q t :: IO [[Int]])
-  return ret
-
 query :: (FromJSON b, HasDatabaseConn env, MonadReader env m, MonadIO m, S.ToRow t) => S.Query -> t -> m [b]
 query q t = do
   env <- ask