Make payload blocks run onDestroyed() of the block payload it carries when destroyed. (#8253)

* Payloads go boom.

* When a payload unit dies too

* Keep the functionality, but limit it to a rule

core/src/mindustry/entities/comp/PayloadComp.java

@@ -60,6 +60,11 @@ abstract class PayloadComp implements Posc, Rotc, Hitboxc, Unitc{
         }
     }
 
+    @Override
+    public void destroy(){
+        if(Vars.state.rules.unitPayloadsExplode) payloads.each(Payload::destroyed);
+    }
+
     float payloadUsed(){
         return payloads.sumf(p -> p.size() * p.size());
     }

core/src/mindustry/game/Rules.java

@@ -59,6 +59,8 @@ public class Rules{
     public boolean unitAmmo = false;
     /** EXPERIMENTAL! If true, blocks will update in units and share power. */
     public boolean unitPayloadUpdate = false;
+    /** If true, units' payloads are destroy()ed when the unit is destroyed. */
+    public boolean unitPayloadsExplode = false;
     /** Whether cores add to unit limit */
     public boolean unitCapVariable = true;
     /** If true, unit spawn points are shown. */

core/src/mindustry/ui/dialogs/CustomRulesDialog.java

@@ -233,6 +233,7 @@ public class CustomRulesDialog extends BaseDialog{
 
         title("@rules.title.unit");
         check("@rules.unitcapvariable", b -> rules.unitCapVariable = b, () -> rules.unitCapVariable);
+        check("@rules.unitpayloadsexplode", b -> rules.unitPayloadsExplode = b, () -> rules.unitPayloadsExplode);
         numberi("@rules.unitcap", f -> rules.unitCap = f, () -> rules.unitCap, -999, 999);
         number("@rules.unitdamagemultiplier", f -> rules.unitDamageMultiplier = f, () -> rules.unitDamageMultiplier);
         number("@rules.unitcrashdamagemultiplier", f -> rules.unitCrashDamageMultiplier = f, () -> rules.unitCrashDamageMultiplier);

core/src/mindustry/world/blocks/payloads/BuildPayload.java

@@ -51,6 +51,11 @@ public class BuildPayload implements Payload{
         build.updatePayload(unitHolder, buildingHolder);
     }
 
+    @Override
+    public void destroyed(){
+        build.onDestroyed();
+    }
+
     @Override
     public ItemStack[] requirements(){
         return build.block.requirements;

core/src/mindustry/world/blocks/payloads/Payload.java

@@ -54,6 +54,8 @@ public interface Payload extends Position{
         return 0f;
     }
 
+    default void destroyed(){};
+
     /** writes the payload for saving. */
     void write(Writes write);
 

core/src/mindustry/world/blocks/payloads/PayloadBlock.java

@@ -151,6 +151,12 @@ public class PayloadBlock extends Block{
             }
         }
 
+        @Override
+        public void onDestroyed(){
+            if(payload != null) payload.destroyed();
+            super.onDestroyed();
+        }
+
         public boolean blends(int direction){
             return PayloadBlock.blends(this, direction);
         }

core/src/mindustry/world/blocks/payloads/PayloadConveyor.java

@@ -190,6 +190,12 @@ public class PayloadConveyor extends Block{
             super.draw();
         }
 
+        @Override
+        public void onDestroyed(){
+            if(item != null) item.destroyed();
+            super.onDestroyed();
+        }
+
         @Override
         public void draw(){
             super.draw();