Enable database support in :engine

api/src/main/java/com/bartlomiejpluta/base/api/context/Context.java

@@ -12,6 +12,11 @@ import com.bartlomiejpluta.base.api.screen.Screen;
 import com.bartlomiejpluta.base.internal.gc.Disposable;
 import com.bartlomiejpluta.base.internal.logic.Updatable;
 import com.bartlomiejpluta.base.internal.render.Renderable;
+import com.bartlomiejpluta.base.util.lambda.UncheckedConsumer;
+import com.bartlomiejpluta.base.util.lambda.UncheckedFunction;
+
+import java.sql.Connection;
+import java.sql.SQLException;
 
 public interface Context extends Updatable, Renderable, Disposable {
    GameRunner getGameRunner();
@@ -38,6 +43,10 @@ public interface Context extends Updatable, Renderable, Disposable {
 
    Sound createSound(String soundUid);
 
+   void withDatabase(UncheckedConsumer<Connection, SQLException> consumer);
+
+   <T> T withDatabase(UncheckedFunction<Connection, T, SQLException> extractor);
+
    void disposeSound(Sound sound);
 
    void playSound(String soundUid);

api/src/main/java/com/bartlomiejpluta/base/util/lambda/UncheckedConsumer.java

@@ -0,0 +1,17 @@
+package com.bartlomiejpluta.base.util.lambda;
+
+import java.util.Objects;
+
+@FunctionalInterface
+public interface UncheckedConsumer<T, E extends Throwable> {
+
+   void accept(T t) throws E;
+
+   default UncheckedConsumer<T, E> andThen(UncheckedConsumer<? super T, ? extends E> after) {
+      Objects.requireNonNull(after);
+      return (T t) -> {
+         accept(t);
+         after.accept(t);
+      };
+   }
+}

api/src/main/java/com/bartlomiejpluta/base/util/lambda/UncheckedFunction.java

@@ -0,0 +1,23 @@
+package com.bartlomiejpluta.base.util.lambda;
+
+import java.util.Objects;
+
+@FunctionalInterface
+public interface UncheckedFunction<T, R, E extends Throwable> {
+
+   R apply(T t) throws E;
+
+   default <V> UncheckedFunction<V, R, E> compose(UncheckedFunction<? super V, ? extends T, ? extends E> before) {
+      Objects.requireNonNull(before);
+      return (V v) -> apply(before.apply(v));
+   }
+
+   default <V> UncheckedFunction<T, V, E> andThen(UncheckedFunction<? super R, ? extends V, ? extends E> after) {
+      Objects.requireNonNull(after);
+      return (T t) -> after.apply(apply(t));
+   }
+
+   static <T, E extends Throwable> UncheckedFunction<T, T, E> identity() {
+      return t -> t;
+   }
+}