First implementation of a MultiCategory

src/main/java/io/github/thebusybiscuit/slimefun4/core/categories/MultiCategory.java

@@ -0,0 +1,47 @@
+package io.github.thebusybiscuit.slimefun4.core.categories;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.annotation.Nonnull;
+import javax.annotation.ParametersAreNonnullByDefault;
+
+import org.apache.commons.lang.Validate;
+import org.bukkit.NamespacedKey;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+
+import io.github.thebusybiscuit.slimefun4.api.player.PlayerProfile;
+import io.github.thebusybiscuit.slimefun4.core.guide.SlimefunGuideLayout;
+
+public class MultiCategory extends FlexCategory {
+
+    private final List<SubCategory> subCategories = new ArrayList<>();
+
+    @ParametersAreNonnullByDefault
+    public MultiCategory(NamespacedKey key, ItemStack item) {
+        this(key, item, 3);
+    }
+
+    @ParametersAreNonnullByDefault
+    public MultiCategory(NamespacedKey key, ItemStack item, int tier) {
+        super(key, item, tier);
+    }
+
+    public void addSubCategory(@Nonnull SubCategory category) {
+        Validate.notNull(category, "The Category cannot be null!");
+
+        subCategories.add(category);
+    }
+
+    @Override
+    public boolean isVisible(Player p, PlayerProfile profile, SlimefunGuideLayout layout) {
+        return true;
+    }
+
+    @Override
+    public void open(Player p, PlayerProfile profile, SlimefunGuideLayout layout) {
+        // TODO: Open Categories menu
+    }
+
+}

src/main/java/io/github/thebusybiscuit/slimefun4/core/categories/SubCategory.java

@@ -0,0 +1,41 @@
+package io.github.thebusybiscuit.slimefun4.core.categories;
+
+import javax.annotation.ParametersAreNonnullByDefault;
+
+import org.bukkit.NamespacedKey;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+
+import me.mrCookieSlime.Slimefun.Objects.Category;
+
+/**
+ * The {@link SubCategory} is a child {@link Category} of the
+ * {@link MultiCategory}.
+ * 
+ * @author TheBusyBiscuit
+ * 
+ * @see MultiCategory
+ *
+ */
+public class SubCategory extends Category {
+
+    @ParametersAreNonnullByDefault
+    public SubCategory(NamespacedKey key, ItemStack item) {
+        this(key, item, 3);
+    }
+
+    @ParametersAreNonnullByDefault
+    public SubCategory(NamespacedKey key, ItemStack item, int tier) {
+        super(key, item, tier);
+    }
+
+    @Override
+    public final boolean isHidden(Player p) {
+        /*
+         * Sub Categories are always hidden,
+         * they won't show up in the normal guide view.
+         */
+        return true;
+    }
+
+}