SPIGOT-4569: Add more BlockData API

By: Parker Hawke <hawkeboyz2@hotmail.com>

paper-api/src/main/java/org/bukkit/block/data/BlockData.java

@@ -7,6 +7,8 @@ import org.bukkit.SoundGroup;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockFace;
 import org.bukkit.block.BlockSupport;
+import org.bukkit.block.PistonMoveReaction;
+import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -108,6 +110,53 @@ public interface BlockData extends Cloneable {
     @NotNull
     SoundGroup getSoundGroup();
 
+    /**
+     * Get the amount of light emitted by this state when in the world.
+     *
+     * @return the light emission
+     */
+    int getLightEmission();
+
+    /**
+     * Check whether or not this state will occlude other blocks.
+     * <p>
+     * Block state occlusion affects visual features of other blocks (e.g. leaves and
+     * wet sponges will not spawn dripping water particles if an occluding state is
+     * below it), or whether light will pass through it.
+     *
+     * @return true if occluding, false otherwise
+     */
+    boolean isOccluding();
+
+    /**
+     * Check whether or not this state requires a specific item to be used to drop
+     * items when broken. For example, diamond ore requires an iron pickaxe and will
+     * not drop diamonds when broken with a wooden or stone pickaxe.
+     *
+     * @return true if a more specific item is required for drops, false if any item
+     * (or an empty hand) will drop items
+     */
+    boolean requiresCorrectToolForDrops();
+
+    /**
+     * Returns if the given item is a preferred choice to break this Block.
+     *
+     * In some cases this determines if a block will drop anything or extra
+     * loot.
+     *
+     * @param tool The tool or item used for breaking this block
+     * @return true if the tool is preferred for breaking this block.
+     */
+    boolean isPreferredTool(@NotNull ItemStack tool);
+
+    /**
+     * Returns the reaction of the block when moved by a piston
+     *
+     * @return reaction
+     */
+    @NotNull
+    PistonMoveReaction getPistonMoveReaction();
+
     /**
      * Checks if this state would be properly supported if it were placed at
      * the given {@link Block}.
@@ -116,7 +165,6 @@ public interface BlockData extends Cloneable {
      * capable of surviving on its neighbouring block states.
      *
      * @param block the block position at which the state would be placed
-     *
      * @return true if the block is supported, false if this state would not survive
      * the world conditions
      */