fix(ecs-gestalt): Migrate Components to gestalt's Components. (#68)

Ref: MovingBlocks/Terasology#4753

Co-authored-by: Tobias Nett <skaldarnar@googlemail.com>

src/main/java/org/terasology/potions/component/EmptyPotionComponent.java

@@ -1,15 +1,15 @@
-// Copyright 2020 The Terasology Foundation
+// Copyright 2021 The Terasology Foundation
 // SPDX-License-Identifier: Apache-2.0
 
 
 package org.terasology.potions.component;
 
-import org.terasology.engine.entitySystem.Component;
 import org.terasology.engine.network.Replicate;
+import org.terasology.gestalt.entitysystem.component.EmptyComponent;
 
 /**
  * This component is only used as an identifier to identify if the entity is an empty potion container.
  */
 @Replicate
-public final class EmptyPotionComponent implements Component {
+public final class EmptyPotionComponent extends EmptyComponent<EmptyPotionComponent> {
 }

src/main/java/org/terasology/potions/component/PotionComponent.java

@@ -1,20 +1,21 @@
-// Copyright 2020 The Terasology Foundation
+// Copyright 2021 The Terasology Foundation
 // SPDX-License-Identifier: Apache-2.0
 
 
 package org.terasology.potions.component;
 
 import com.google.common.collect.Lists;
-import org.terasology.engine.entitySystem.Component;
 import org.terasology.engine.network.Replicate;
+import org.terasology.gestalt.entitysystem.component.Component;
 
 import java.util.List;
+import java.util.stream.Collectors;
 
 /**
  * This component is used for storing information about a potion. Specifically, what potion bottle it came from, the
  * durability cost per drink, whether it has a genome, and all of the potion's effects.
  */
-public final class PotionComponent implements Component {
+public final class PotionComponent implements Component<PotionComponent> {
     /** Can this potion bottle be reused indefinitely. */
     @Replicate
     public boolean hasInfDurability = false;
@@ -36,4 +37,15 @@ public final class PotionComponent implements Component {
     /** List of PotionEffects that this potion has. */
     @Replicate
     public List<PotionEffect> effects = Lists.newArrayList();
+
+    @Override
+    public void copyFrom(PotionComponent other) {
+        this.hasInfDurability = other.hasInfDurability;
+        this.bottlePrefab = other.bottlePrefab;
+        this.costPerDrink = other.costPerDrink;
+        this.hasGenome = other.hasGenome;
+        this.effects = other.effects.stream()
+                .map(PotionEffect::copy)
+                .collect(Collectors.toList());
+    }
 }

src/main/java/org/terasology/potions/component/PotionEffect.java

@@ -1,4 +1,4 @@
-// Copyright 2020 The Terasology Foundation
+// Copyright 2021 The Terasology Foundation
 // SPDX-License-Identifier: Apache-2.0
 
 package org.terasology.potions.component;
@@ -20,4 +20,12 @@ public class PotionEffect {
     /** Duration of the potion's effect in milliseconds. */
     @Replicate
     public long duration;
+
+    public PotionEffect copy() {
+        PotionEffect newPE = new PotionEffect();
+        newPE.effect = this.effect;
+        newPE.magnitude = this.magnitude;
+        newPE.duration = this.duration;
+        return newPE;
+    }
 }

src/main/java/org/terasology/potions/component/PotionEffectsListComponent.java

@@ -1,10 +1,10 @@
-// Copyright 2020 The Terasology Foundation
+// Copyright 2021 The Terasology Foundation
 // SPDX-License-Identifier: Apache-2.0
 
 package org.terasology.potions.component;
 
-import org.terasology.engine.entitySystem.Component;
 import org.terasology.engine.network.Replicate;
+import org.terasology.gestalt.entitysystem.component.Component;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -16,8 +16,14 @@
  *
  * Note: Make sure that the entity you are attaching this to has a PhysicalStatsComponent.
  */
-public class PotionEffectsListComponent implements Component {
+public class PotionEffectsListComponent implements Component<PotionEffectsListComponent> {
     /** A map of potion-based effects being applied to an entity. */
     @Replicate
     public Map<String, PotionEffect> effects = new HashMap<String, PotionEffect>();
+
+    @Override
+    public void copyFrom(PotionEffectsListComponent other) {
+        effects.clear();
+        other.effects.forEach((k, v) -> this.effects.put(k, v.copy()));
+    }
 }