Make abstract inventory menu class

src/main/java/com/cjburkey/claimchunk/gui/GuiMenuScreen.java

@@ -0,0 +1,94 @@
+package com.cjburkey.claimchunk.gui;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.inventory.ClickType;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * An abstract wrapper for {@link ICCGui} to make creating inventory menus easier.
+ *
+ * @since 0.0.26
+ */
+public abstract class GuiMenuScreen implements ICCGui {
+
+ /** Anonymous callback for item click event. */
+ @FunctionalInterface
+ public interface GuiItemAction {
+
+ /** Called when the item is clicked. */
+ void onClick(
+ @NotNull Inventory inventory,
+ @NotNull Player player,
+ int slot,
+ @NotNull ClickType clickType,
+ @NotNull ItemStack stack);
+ }
+
+ /** Wrapper around an interactive item in the GUI menu. */
+ record GuiItemWrapper(@NotNull ItemStack stack, @NotNull GuiItemAction action) {}
+
+ private final int rowCount;
+ private final GuiItemWrapper[] actions;
+ private final String name;
+
+ protected GuiMenuScreen(int rowCount, @NotNull String name) {
+ this.rowCount = Math.min(Math.max(rowCount, 1), 6);
+ this.actions = new GuiItemWrapper[this.rowCount * 9];
+ this.name = name;
+ }
+
+ /**
+ * Add an interactive button item to this inventory GUI.
+ *
+ * @param slot The slot of the inventory in which to put the item.
+ * @param stack The stack that represents this action.
+ * @param action The on-click callback
+ */
+ protected void addInteractiveButton(
+ int slot, @NotNull ItemStack stack, @NotNull GuiItemAction action) {
+ if (slot >= 0 && slot < this.actions.length) {
+ this.actions[slot] = new GuiItemWrapper(stack, action);
+ }
+ }
+
+ @Override
+ public void onOpen(@NotNull Inventory inventory, @NotNull Player player) {
+ for (int slot = 0; slot < actions.length; slot++) {
+ GuiItemWrapper action = actions[slot];
+ if (action != null) {
+ inventory.setItem(slot, action.stack());
+ }
+ }
+ }
+
+ @Override
+ public void onClick(
+ @NotNull Inventory inventory,
+ @NotNull Player player,
+ int slot,
+ @NotNull ClickType clickType,
+ @Nullable ItemStack stack) {
+ assert slot >= 0 && slot < actions.length;
+
+ GuiItemWrapper action = actions[slot];
+ if (action != null && stack != null) {
+ action.action().onClick(inventory, player, slot, clickType, stack);
+ }
+ }
+
+ @Override
+ public void onClose(@NotNull Inventory inventory, @NotNull Player player) {}
+
+ @Override
+ public @NotNull String getName() {
+ return name;
+ }
+
+ @Override
+ public int getRows() {
+ return rowCount;
+ }
+}

src/main/java/com/cjburkey/claimchunk/gui/screens/MainMenu.java

@@ -1,36 +1,28 @@
 package com.cjburkey.claimchunk.gui.screens;
 
-import com.cjburkey.claimchunk.gui.ICCGui;
+import com.cjburkey.claimchunk.gui.GuiMenuScreen;
 
+import org.bukkit.Material;
 import org.bukkit.entity.Player;
 import org.bukkit.event.inventory.ClickType;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.ItemStack;
-import org.jetbrains.annotations.NotNull;
 
-public class MainMenu implements ICCGui {
+public class MainMenu extends GuiMenuScreen {
 
- @Override
- public void onOpen(@NotNull Inventory inventory, @NotNull Player player) {}
-
- @Override
- public void onClose(@NotNull Inventory inventory, @NotNull Player player) {}
-
- @Override
- public void onClick(
- @NotNull Inventory inventory,
- @NotNull Player player,
- int slot,
- @NotNull ClickType clickType,
- @NotNull ItemStack stack) {}
-
- @Override
- public @NotNull String getName() {
- return "ClaimChunk GUI";
+ public MainMenu() {
+ super(1, "ClaimChunk Menu");
+ addButtons();
  }
 
- @Override
- public int getRows() {
- return 0;
+ private void addButtons() {
+ addInteractiveButton(
+ 0,
+ new ItemStack(Material.PAPER),
+ (Inventory inventory,
+ Player player,
+ int slot,
+ ClickType clickType,
+ ItemStack stack) -> {});
  }
 }