Moves a bunch of inner classes to their own files

src/main/java/net/knarcraft/stargate/utility/MaterialHelper.java

@@ -0,0 +1,35 @@
+package net.knarcraft.stargate.utility;
+
+import org.bukkit.Material;
+import org.bukkit.Tag;
+
+/**
+ * This class helps decide properties of materials not already present in the Spigot API
+ */
+public final class MaterialHelper {
+
+    /**
+     * Checks whether the given material is a dead or alive wall coral
+     * @param material <p>The material to check</p>
+     * @return <p>True if the material is a wall coral</p>
+     */
+    public static boolean isWallCoral(Material material) {
+        return Tag.WALL_CORALS.isTagged(material) ||
+                material.equals(Material.DEAD_BRAIN_CORAL_WALL_FAN) ||
+                material.equals(Material.DEAD_BUBBLE_CORAL_WALL_FAN) ||
+                material.equals(Material.DEAD_FIRE_CORAL_WALL_FAN) ||
+                material.equals(Material.DEAD_HORN_CORAL_WALL_FAN) ||
+                material.equals(Material.DEAD_TUBE_CORAL_WALL_FAN);
+    }
+
+    /**
+     * Checks whether the given material can be used as a button
+     * @param material <p>The material to check</p>
+     * @return <p>True if the material can be used as a button</p>
+     */
+    public static boolean isButtonCompatible(Material material) {
+        return Tag.BUTTONS.isTagged(material) || isWallCoral(material) || Tag.SHULKER_BOXES.isTagged(material) ||
+                material == Material.CHEST;
+    }
+
+}