Block: added burnsForever()

src/pocketmine/block/Block.php

@@ -516,6 +516,15 @@ class Block extends Position implements BlockIds, Metadatable{
 		return 0;
 	}
 
+	/**
+	 * Returns whether fire lit on this block will burn indefinitely.
+	 *
+	 * @return bool
+	 */
+	public function burnsForever() : bool{
+		return false;
+	}
+
 	/**
 	 * Returns the Block on the side $side, works like Vector3::getSide()
 	 *

src/pocketmine/block/Fire.php

@@ -94,7 +94,7 @@ class Fire extends Flowable{
 	}
 
 	public function onRandomTick() : void{
-		if($this->getSide(Vector3::SIDE_DOWN)->getId() !== self::NETHERRACK){
+		if(!$this->getSide(Vector3::SIDE_DOWN)->burnsForever()){
 			if(mt_rand(0, 2) === 0){
 				if($this->meta === 0x0F){
 					$this->level->setBlock($this, BlockFactory::get(Block::AIR));

src/pocketmine/block/Magma.php

@@ -66,4 +66,8 @@ class Magma extends Solid{
 			$entity->attack($ev);
 		}
 	}
+
+	public function burnsForever() : bool{
+		return true;
+	}
 }

src/pocketmine/block/Netherrack.php

@@ -48,4 +48,8 @@ class Netherrack extends Solid{
 	public function getToolHarvestLevel() : int{
 		return TieredTool::TIER_WOODEN;
 	}
+
+	public function burnsForever() : bool{
+		return true;
+	}
 }