SPIGOT-7613: Don't respect mobGriefing gamerule in World#createExplosion() without source entity

By: 2008Choco <hawkeboyz2@hotmail.com>

paper-server/nms-patches/net/minecraft/world/level/World.patch

@@ -270,7 +270,19 @@
          if (this.isOutsideBuildHeight(blockposition)) {
              return Blocks.VOID_AIR.defaultBlockState();
          } else {
-@@ -543,6 +733,16 @@
+@@ -507,6 +697,11 @@
+         Explosion.Effect explosion_effect;
+ 
+         switch (world_a) {
++            // CraftBukkit start - handle custom explosion type
++            case STANDARD:
++                explosion_effect = Explosion.Effect.DESTROY;
++                break;
++            // CraftBukkit end
+             case NONE:
+                 explosion_effect = Explosion.Effect.KEEP;
+                 break;
+@@ -543,6 +738,16 @@
      @Nullable
      @Override
      public TileEntity getBlockEntity(BlockPosition blockposition) {
@@ -287,7 +299,7 @@
          return this.isOutsideBuildHeight(blockposition) ? null : (!this.isClientSide && Thread.currentThread() != this.thread ? null : this.getChunkAt(blockposition).getBlockEntity(blockposition, Chunk.EnumTileEntityState.IMMEDIATE));
      }
  
-@@ -550,6 +750,12 @@
+@@ -550,6 +755,12 @@
          BlockPosition blockposition = tileentity.getBlockPos();
  
          if (!this.isOutsideBuildHeight(blockposition)) {
@@ -300,7 +312,7 @@
              this.getChunkAt(blockposition).addAndRegisterBlockEntity(tileentity);
          }
      }
-@@ -680,7 +886,7 @@
+@@ -680,7 +891,7 @@
  
                  for (int k = 0; k < j; ++k) {
                      EntityComplexPart entitycomplexpart = aentitycomplexpart[k];
@@ -309,3 +321,12 @@
  
                      if (t0 != null && predicate.test(t0)) {
                          list.add(t0);
+@@ -960,7 +1171,7 @@
+ 
+     public static enum a {
+ 
+-        NONE, BLOCK, MOB, TNT, BLOW;
++        NONE, BLOCK, MOB, TNT, BLOW, STANDARD; // CraftBukkit - Add STANDARD which will always use Explosion.Effect.DESTROY
+ 
+         private a() {}
+     }

paper-server/src/main/java/org/bukkit/craftbukkit/CraftWorld.java

@@ -703,7 +703,16 @@ public class CraftWorld extends CraftRegionAccessor implements World {
 
     @Override
     public boolean createExplosion(double x, double y, double z, float power, boolean setFire, boolean breakBlocks, Entity source) {
-        return !world.explode(source == null ? null : ((CraftEntity) source).getHandle(), x, y, z, power, setFire, breakBlocks ? net.minecraft.world.level.World.a.MOB : net.minecraft.world.level.World.a.NONE).wasCanceled;
+        net.minecraft.world.level.World.a explosionType;
+        if (!breakBlocks) {
+            explosionType = net.minecraft.world.level.World.a.NONE; // Don't break blocks
+        } else if (source == null) {
+            explosionType = net.minecraft.world.level.World.a.STANDARD; // Break blocks, don't decay drops
+        } else {
+            explosionType = net.minecraft.world.level.World.a.MOB; // Respect mobGriefing gamerule
+        }
+
+        return !world.explode(source == null ? null : ((CraftEntity) source).getHandle(), x, y, z, power, setFire, explosionType).wasCanceled;
     }
 
     @Override