Add a base for GUI to manage aspects of the island

plugin/src/main/java/com/alttd/cometskyblock/CometSkyBlockPlugin.java

@@ -3,6 +3,7 @@ package com.alttd.cometskyblock;
 import com.alttd.cometskyblock.commands.challenges.ChallengeCommand;
 import com.alttd.cometskyblock.commands.island.IslandCommand;
 import com.alttd.cometskyblock.configuration.*;
+import com.alttd.cometskyblock.gui.GUIListener;
 import com.alttd.cometskyblock.listeners.BedListener;
 import com.alttd.cometskyblock.listeners.CobbestoneGeneratorListener;
 import com.alttd.cometskyblock.listeners.PlayerJoinListener;
@@ -82,11 +83,11 @@ public class CometSkyBlockPlugin extends JavaPlugin implements CometSkyBlockAPI
     }
 
     public void loadEventListeners() {
-        // TODO - Use reflection to load all of these
         final PluginManager pm = getServer().getPluginManager();
         pm.registerEvents(new PlayerJoinListener(this), this);
         pm.registerEvents(new BedListener(this), this);
         pm.registerEvents(new CobbestoneGeneratorListener(this), this);
+        pm.registerEvents(new GUIListener(this), this);
     }
 
 }

plugin/src/main/java/com/alttd/cometskyblock/challenges/ChallengesGUI.java

@@ -0,0 +1,17 @@
+package com.alttd.cometskyblock.challenges;
+
+import com.alttd.cometskyblock.gui.GUIInventory;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import org.bukkit.Bukkit;
+import org.bukkit.inventory.Inventory;
+
+public class ChallengesGUI extends GUIInventory {
+
+    public ChallengesGUI() {
+        super();
+    }
+    @Override
+    protected Inventory createInventory() { // TODO - config
+        return Bukkit.createInventory(this, 54, MiniMessage.miniMessage().deserialize("<red>GUI"));
+    }
+}

plugin/src/main/java/com/alttd/cometskyblock/gui/GUI.java

@@ -0,0 +1,15 @@
+package com.alttd.cometskyblock.gui;
+
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.event.inventory.InventoryCloseEvent;
+import org.bukkit.event.inventory.InventoryOpenEvent;
+
+public interface GUI {
+
+    void onClick(InventoryClickEvent event);
+
+    void onOpen(InventoryOpenEvent event);
+
+    void onClose(InventoryCloseEvent event);
+
+}

plugin/src/main/java/com/alttd/cometskyblock/gui/GUIButton.java

@@ -0,0 +1,27 @@
+package com.alttd.cometskyblock.gui;
+
+import lombok.Getter;
+import org.bukkit.entity.Player;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.inventory.ItemStack;
+
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+@Getter
+public class GUIButton {
+
+    private Function<Player, ItemStack> iconCreator;
+    private Consumer<InventoryClickEvent> eventConsumer;
+
+    public GUIButton creator(Function<Player, ItemStack> iconCreator) {
+        this.iconCreator = iconCreator;
+        return this;
+    }
+
+    public GUIButton consumer(Consumer<InventoryClickEvent> eventConsumer) {
+        this.eventConsumer = eventConsumer;
+        return this;
+    }
+
+}

plugin/src/main/java/com/alttd/cometskyblock/gui/GUIInventory.java

@@ -0,0 +1,115 @@
+package com.alttd.cometskyblock.gui;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.event.inventory.InventoryCloseEvent;
+import org.bukkit.event.inventory.InventoryOpenEvent;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.InventoryHolder;
+import org.bukkit.inventory.ItemFlag;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Consumer;
+
+public abstract class GUIInventory implements GUI, InventoryHolder {
+
+    private final Inventory inventory;
+    private final Map<Integer, GUIButton> buttons = new HashMap<>();
+    int currentSlot = 0;
+    int pageIndex = 0;
+
+    public GUIInventory() {
+        this.inventory = this.createInventory();
+    }
+
+    protected abstract Inventory createInventory();
+
+    @Override
+    public @NotNull Inventory getInventory() {
+        return inventory;
+    }
+
+    @Override
+    public void onClick(InventoryClickEvent event) {
+        int slot = event.getSlot();
+        GUIButton button = this.buttons.get(slot);
+        if (button != null) {
+            event.setCancelled(true);
+            button.eventConsumer().accept(event);
+        }
+    }
+
+    @Override
+    public void onOpen(InventoryOpenEvent event) {
+        this.decorate((Player) event.getPlayer());
+    }
+
+    @Override
+    public void onClose(InventoryCloseEvent event) {
+
+    }
+
+    public void addButton(int slot, GUIButton button) {
+        this.buttons.put(slot, button);
+    }
+
+    public void decorate(Player player) {
+        this.buttons.forEach((slot, button) -> {
+            ItemStack icon = button.iconCreator().apply(player);
+            this.inventory.setItem(slot, icon);
+        });
+    }
+
+    public GUIButton createMenuButton(Material material, String name, List<String> lore, Consumer<InventoryClickEvent> eventConsumer) {
+        return new GUIButton()
+                .creator(player -> createGuiItem(material, name, lore))
+                .consumer(eventConsumer);
+    }
+
+    public ItemStack createGuiItem(Material material, String name, List<String> lore) {
+        ItemStack item = new ItemStack(material, 1);
+        ItemMeta meta = item.getItemMeta();
+        meta.addItemFlags(ItemFlag.HIDE_ATTRIBUTES, ItemFlag.HIDE_ITEM_SPECIFICS, ItemFlag.HIDE_ENCHANTS);
+        meta.displayName(MiniMessage.miniMessage().deserialize(name));
+
+        List<Component> metaLore = new ArrayList<>();
+        for (String loreString : lore) {
+            metaLore.add(MiniMessage.miniMessage().deserialize(loreString));
+        }
+
+        meta.lore(metaLore);
+        item.setItemMeta(meta);
+        return item;
+    }
+
+    void makeMenuBar() {
+        for (int i = inventory.getSize() - 9; i < inventory.getSize(); ++i) {
+            addButton(i, createMenuButton(Material.BLACK_STAINED_GLASS_PANE, "", new ArrayList<>(), event -> {}));
+        }
+    }
+
+    public void open(Player player) {
+        if (player != null) {
+            player.openInventory(inventory);
+        }
+    }
+
+    protected boolean addItem(GUIButton guiButton) {
+        if (currentSlot == inventory.getSize() - 9)
+            return false;
+
+        addButton(currentSlot, guiButton);
+        currentSlot++;
+        return true;
+    }
+
+}

plugin/src/main/java/com/alttd/cometskyblock/gui/GUIListener.java

@@ -0,0 +1,64 @@
+package com.alttd.cometskyblock.gui;
+
+import com.alttd.cometskyblock.CometSkyBlockPlugin;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.ClickType;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.event.inventory.InventoryCloseEvent;
+import org.bukkit.event.inventory.InventoryOpenEvent;
+
+/**
+ *  Basically a handler to redirect events to our GUI implementations
+ */
+public class GUIListener implements Listener {
+
+    protected final CometSkyBlockPlugin plugin;
+
+    public GUIListener(CometSkyBlockPlugin plugin) {
+        this.plugin = plugin;
+    }
+
+    @EventHandler
+    public void onClick(InventoryClickEvent event) {
+        if (!(event.getWhoClicked() instanceof Player))
+            return;
+
+        if (!(event.getView().getTopInventory().getHolder() instanceof GUIInventory gui))
+            return;
+
+        if ((event.getView().getBottomInventory().equals(event.getClickedInventory())))
+            return;
+
+        if (event.getClick() == ClickType.NUMBER_KEY) {
+            event.setCancelled(true);
+            return;
+        }
+
+        gui.onClick(event);
+    }
+
+    @EventHandler
+    public void onOpen(InventoryOpenEvent event) {
+        if (!(event.getPlayer() instanceof Player))
+            return;
+
+        if (!(event.getView().getTopInventory().getHolder() instanceof GUIInventory gui))
+            return;
+
+        gui.onOpen(event);
+    }
+
+    @EventHandler
+    public void onClose(InventoryCloseEvent event) {
+        if (!(event.getPlayer() instanceof Player))
+            return;
+
+        if (!(event.getView().getTopInventory().getHolder() instanceof GUIInventory gui))
+            return;
+
+        gui.onClose(event);
+    }
+
+}

plugin/src/main/java/com/alttd/cometskyblock/island/gui/IslandGUI.java

@@ -0,0 +1,17 @@
+package com.alttd.cometskyblock.island.gui;
+
+import com.alttd.cometskyblock.gui.GUIInventory;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import org.bukkit.Bukkit;
+import org.bukkit.inventory.Inventory;
+
+public class IslandGUI extends GUIInventory {
+
+    public IslandGUI() {
+        super();
+    }
+    @Override
+    protected Inventory createInventory() { // TODO - config
+        return Bukkit.createInventory(this, 54, MiniMessage.miniMessage().deserialize("<red>GUI"));
+    }
+}

plugin/src/main/java/com/alttd/cometskyblock/island/gui/MembersGUI.java

@@ -0,0 +1,17 @@
+package com.alttd.cometskyblock.island.gui;
+
+import com.alttd.cometskyblock.gui.GUIInventory;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import org.bukkit.Bukkit;
+import org.bukkit.inventory.Inventory;
+
+public class MembersGUI extends GUIInventory {
+
+    public MembersGUI() {
+        super();
+    }
+    @Override
+    protected Inventory createInventory() { // TODO - config
+        return Bukkit.createInventory(this, 54, MiniMessage.miniMessage().deserialize("<red>GUI"));
+    }
+}

plugin/src/main/java/com/alttd/cometskyblock/island/gui/SettingsGUI.java

@@ -0,0 +1,17 @@
+package com.alttd.cometskyblock.island.gui;
+
+import com.alttd.cometskyblock.gui.GUIInventory;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import org.bukkit.Bukkit;
+import org.bukkit.inventory.Inventory;
+
+public class SettingsGUI extends GUIInventory {
+
+    public SettingsGUI() {
+        super();
+    }
+    @Override
+    protected Inventory createInventory() { // TODO - config
+        return Bukkit.createInventory(this, 54, MiniMessage.miniMessage().deserialize("<red>GUI"));
+    }
+}

plugin/src/main/java/com/alttd/cometskyblock/island/gui/UpgradesGUI.java

@@ -0,0 +1,17 @@
+package com.alttd.cometskyblock.island.gui;
+
+import com.alttd.cometskyblock.gui.GUIInventory;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import org.bukkit.Bukkit;
+import org.bukkit.inventory.Inventory;
+
+public class UpgradesGUI extends GUIInventory {
+
+    public UpgradesGUI() {
+        super();
+    }
+    @Override
+    protected Inventory createInventory() { // TODO - config
+        return Bukkit.createInventory(this, 54, MiniMessage.miniMessage().deserialize("<red>GUI"));
+    }
+}