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

2 files changed, 11 insertions, 5 deletions

diff --git a/haskell/src/SpaceTraders/Database/000_init.sql b/haskell/src/SpaceTraders/Database/000_init.sql
index 78a62cd..cbe6029 100644
--- a/haskell/src/SpaceTraders/Database/000_init.sql
+++ b/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 (
diff --git a/haskell/src/SpaceTraders/Database/Ships.hs b/haskell/src/SpaceTraders/Database/Ships.hs
index 5a2ab7c..8c47059 100644
--- a/haskell/src/SpaceTraders/Database/Ships.hs
+++ b/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)