chore/feat: cleanup gui logic, extendable inventories / guis

Bukkit/src/main/java/com/plotsquared/bukkit/util/gui/BukkitPlotInventory.java

@@ -41,9 +41,7 @@ import net.kyori.adventure.text.minimessage.tag.resolver.TagResolver;
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.entity.Player;
-import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
-import org.bukkit.event.inventory.InventoryCloseEvent;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.ItemMeta;
@@ -61,85 +59,45 @@ import java.util.WeakHashMap;
 public class BukkitPlotInventory extends PlotInventory<Player, ItemStack> {
 
     private static Listener INVENTORY_LISTENER;
-    private final ItemStack[] items;
-    private final PlotInventoryClickHandler<Player>[] clickHandlers;
-    private final Map<UUID, Inventory> viewers = new WeakHashMap<>();
     private static final Map<UUID, BukkitPlotInventory> INVENTORIES = new WeakHashMap<>();
 
+    private final ItemStack[] items;
+    final PlotInventoryClickHandler[] clickHandlers;
+    Inventory nativeInventory;
+
     /**
      * {@inheritDoc}
      */
-    protected BukkitPlotInventory(final int size, final Caption titleCaption, final TagResolver... titleResolvers) {
-        super(size, titleCaption, titleResolvers);
+    protected BukkitPlotInventory(
+            PlotPlayer<Player> player, final int size, final Caption titleCaption,
+            final TagResolver... titleResolvers
+    ) {
+        super(player, size, titleCaption, titleResolvers);
         this.items = new ItemStack[size];
         this.clickHandlers = new PlotInventoryClickHandler[size];
+        this.nativeInventory = Bukkit.createInventory(player.getPlatformPlayer(), size(),
+                BukkitUtil.LEGACY_COMPONENT_SERIALIZER.serialize(MiniMessage.miniMessage().deserialize(
+                        titleCaption().getComponent(player), titleResolvers()
+                ))
+        );
 
-        if (INVENTORY_LISTENER != null) {
-            return;
-        }
-        INVENTORY_LISTENER = new Listener() {
-            @EventHandler
-            public void onInventoryClick(final org.bukkit.event.inventory.InventoryClickEvent event) {
-                final PlotPlayer<Player> player = BukkitUtil.adapt((Player) event.getWhoClicked());
-
-                BukkitPlotInventory currentInventory = INVENTORIES.get(player.getUUID());
-                if (currentInventory == null) {
-                    return;
-                }
-                if (!Objects.equals(event.getClickedInventory(), currentInventory.viewers.get(player.getUUID()))) {
-                    return;
-                }
-
-                final int slot = event.getRawSlot();
-                if (slot < 0 || slot >= currentInventory.size()) {
-                    return;
-                }
-                final PlotInventoryClickHandler<Player> clickHandler = currentInventory.clickHandlers[slot];
-                if (clickHandler == null) {
-                    return;
-                }
-                event.setCancelled(true);
-                final ItemStack item = event.getCurrentItem();
-                if (item == null) {
-                    clickHandler.handle(null, player);
-                    return;
-                }
-                clickHandler.handle(new PlotItemStack(
-                        BukkitAdapter.asItemType(item.getType()),
-                        item.getAmount(),
-                        item.getItemMeta().getDisplayName(),
-                        item.getItemMeta().hasLore() ? item.getItemMeta().getLore().toArray(String[]::new) : new String[0]
-                ), player);
-            }
-
-            @EventHandler
-            public void onInventoryClose(InventoryCloseEvent event) {
-                final PlotPlayer<Player> player = BukkitUtil.adapt((Player) event.getPlayer());
-                BukkitPlotInventory currentInventory = INVENTORIES.get(player.getUUID());
-                if (currentInventory == null) {
-                    return;
-                }
-                currentInventory.viewers.remove(player.getUUID());
-                INVENTORIES.remove(player.getUUID());
-            }
-
-        };
+        if (INVENTORY_LISTENER == null) {
+            INVENTORY_LISTENER = new BukkitPlotInventoryListener(INVENTORIES);
             BukkitPlatform bukkitPlatform = ((BukkitPlatform) PlotSquared.platform());
             bukkitPlatform.getServer().getPluginManager().registerEvents(INVENTORY_LISTENER, bukkitPlatform);
         }
+    }
 
     @Override
-    public void setItem(final int slot, final PlotItemStack item, final PlotInventoryClickHandler<Player> onClick) {
+    public void setItem(final int slot, final PlotItemStack item, final PlotInventoryClickHandler onClick) {
         Preconditions.checkElementIndex(slot, size(), "Slot must be in range (0, " + size() + ")");
         this.items[slot] = toPlatformItem(item);
         this.clickHandlers[slot] = onClick;
-        for (final Inventory value : viewers.values()) {
-            value.setItem(slot, this.items[slot]);
-        }
+        this.nativeInventory.setItem(slot, this.items[slot]);
     }
 
     @Override
-    public void addItem(final PlotItemStack item, final PlotInventoryClickHandler<Player> onClick) {
+    public void addItem(final PlotItemStack item, final PlotInventoryClickHandler onClick) {
         // TODO: probably needs more love (who doesn't)
         int slot = -1;
         // try to fill stacks
@@ -161,31 +119,19 @@ public class BukkitPlotInventory extends PlotInventory<Player, ItemStack> {
         Preconditions.checkElementIndex(slot, size());
         this.items[slot] = toPlatformItem(item);
         this.clickHandlers[slot] = onClick;
-        for (final Inventory value : viewers.values()) {
-            value.setItem(slot, this.items[slot]);
-        }
+        this.nativeInventory.setItem(slot, this.items[slot]);
     }
 
     @Override
-    protected void openPlatformPlayer(final PlotPlayer<Player> player) {
-        Component title = MiniMessage.miniMessage().deserialize(
-                titleCaption().getComponent(player), titleResolvers()
-        );
-        Inventory inventory = Bukkit.createInventory(player.getPlatformPlayer(), size(),
-                BukkitUtil.LEGACY_COMPONENT_SERIALIZER.serialize(title)
-        );
-        for (int i = 0; i < items.length; i++) {
-            inventory.setItem(i, items[i]);
-        }
-        INVENTORIES.put(player.getUUID(), this);
-        viewers.put(player.getUUID(), inventory);
-        player.getPlatformPlayer().openInventory(inventory);
+    public void open() {
+        INVENTORIES.put(player().getUUID(), this);
+        player().getPlatformPlayer().openInventory(this.nativeInventory);
     }
 
     @Override
-    protected void closePlatformPlayer(final PlotPlayer<Player> player) {
-        if (player.getPlatformPlayer().getOpenInventory().getTopInventory().equals(INVENTORIES.get(player.getUUID()))) {
-            player.getPlatformPlayer().closeInventory();
+    public void close() {
+        if (Objects.equals(player().getPlatformPlayer().getOpenInventory().getTopInventory(), this.nativeInventory)) {
+            player().getPlatformPlayer().closeInventory();
         }
     }
 

Bukkit/src/main/java/com/plotsquared/bukkit/util/gui/BukkitPlotInventoryListener.java

@@ -0,0 +1,87 @@
+package com.plotsquared.bukkit.util.gui;
+
+import com.plotsquared.bukkit.util.BukkitUtil;
+import com.plotsquared.core.player.PlotPlayer;
+import com.plotsquared.core.plot.PlotItemStack;
+import com.plotsquared.core.util.gui.PlotInventoryClickHandler;
+import com.plotsquared.core.util.gui.PlotInventoryClickType;
+import com.sk89q.worldedit.bukkit.BukkitAdapter;
+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.InventoryCloseEvent;
+import org.bukkit.inventory.ItemStack;
+
+import java.util.EnumMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+
+public class BukkitPlotInventoryListener implements Listener {
+
+    private static final EnumMap<ClickType, PlotInventoryClickType> CLICK_MAPPING = new EnumMap<>(ClickType.class);
+
+    static {
+        CLICK_MAPPING.put(ClickType.LEFT, PlotInventoryClickType.LEFT);
+        CLICK_MAPPING.put(ClickType.RIGHT, PlotInventoryClickType.RIGHT);
+        CLICK_MAPPING.put(ClickType.SHIFT_LEFT, PlotInventoryClickType.SHIFT_LEFT);
+        CLICK_MAPPING.put(ClickType.SHIFT_RIGHT, PlotInventoryClickType.SHIFT_RIGHT);
+        CLICK_MAPPING.put(ClickType.MIDDLE, PlotInventoryClickType.MIDDLE);
+    }
+
+    private final Map<UUID, BukkitPlotInventory> inventories;
+
+    public BukkitPlotInventoryListener(final Map<UUID, BukkitPlotInventory> inventories) {
+        this.inventories = inventories;
+    }
+
+    @EventHandler
+    public void onInventoryClick(final org.bukkit.event.inventory.InventoryClickEvent event) {
+        final PlotPlayer<Player> player = BukkitUtil.adapt((Player) event.getWhoClicked());
+
+        BukkitPlotInventory currentInventory = inventories.get(player.getUUID());
+        if (currentInventory == null) {
+            return;
+        }
+        if (!Objects.equals(event.getClickedInventory(), currentInventory.nativeInventory)) {
+            return;
+        }
+
+        final int slot = event.getRawSlot();
+        if (slot < 0 || slot >= currentInventory.size()) {
+            return;
+        }
+        PlotInventoryClickType clickType = CLICK_MAPPING.getOrDefault(event.getClick(), PlotInventoryClickType.OTHER);
+        event.setCancelled(true);
+
+        final PlotInventoryClickHandler clickHandler = currentInventory.clickHandlers[slot];
+        if (clickHandler == null) {
+            return;
+        }
+        final ItemStack item = event.getCurrentItem();
+        if (item == null) {
+            clickHandler.handle(null, clickType);
+            return;
+        }
+        clickHandler.handle(new PlotItemStack(
+                BukkitAdapter.asItemType(item.getType()),
+                item.getAmount(),
+                item.getItemMeta().getDisplayName(),
+                item.getItemMeta().hasLore() ? item.getItemMeta().getLore().toArray(String[]::new) : new String[0]
+        ), clickType);
+    }
+
+    @EventHandler
+    public void onInventoryClose(InventoryCloseEvent event) {
+        final PlotPlayer<Player> player = BukkitUtil.adapt((Player) event.getPlayer());
+        BukkitPlotInventory currentInventory = inventories.get(player.getUUID());
+        if (currentInventory == null) {
+            return;
+        }
+        currentInventory.nativeInventory = null;
+        inventories.remove(player.getUUID());
+    }
+
+
+}

Bukkit/src/main/java/com/plotsquared/bukkit/util/gui/BukkitPlotInventoryProvider.java

@@ -26,6 +26,7 @@
 package com.plotsquared.bukkit.util.gui;
 
 import com.plotsquared.core.configuration.caption.Caption;
+import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.util.gui.PlotInventory;
 import com.plotsquared.core.util.gui.PlotInventoryProvider;
 import net.kyori.adventure.text.minimessage.tag.resolver.TagResolver;
@@ -36,11 +37,12 @@ public class BukkitPlotInventoryProvider implements PlotInventoryProvider<Player
 
     @Override
     public PlotInventory<Player, ItemStack> createInventory(
+            PlotPlayer<?> player,
             final int size,
             final Caption titleCaption,
             final TagResolver... titleResolvers
     ) {
-        return new BukkitPlotInventory(size, titleCaption, titleResolvers);
+        return new BukkitPlotInventory((PlotPlayer<Player>) player, size, titleCaption, titleResolvers);
     }
 
 }

Core/src/main/java/com/plotsquared/core/command/Music.java

@@ -27,29 +27,18 @@ package com.plotsquared.core.command;
 
 import com.google.inject.Inject;
 import com.plotsquared.core.configuration.caption.TranslatableCaption;
-import com.plotsquared.core.events.PlotFlagAddEvent;
-import com.plotsquared.core.events.PlotFlagRemoveEvent;
-import com.plotsquared.core.events.Result;
+import com.plotsquared.core.gui.PlotMusicInventory;
 import com.plotsquared.core.location.Location;
 import com.plotsquared.core.permissions.Permission;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
-import com.plotsquared.core.plot.PlotItemStack;
-import com.plotsquared.core.plot.flag.PlotFlag;
-import com.plotsquared.core.plot.flag.implementations.MusicFlag;
 import com.plotsquared.core.util.EventDispatcher;
 import com.plotsquared.core.util.Permissions;
-import com.plotsquared.core.util.gui.PlotInventory;
 import com.plotsquared.core.util.gui.PlotInventoryProvider;
-import com.sk89q.worldedit.world.item.ItemTypes;
-import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.minimessage.tag.Tag;
 import net.kyori.adventure.text.minimessage.tag.resolver.TagResolver;
 import org.checkerframework.checker.nullness.qual.NonNull;
 
-import java.util.List;
-import java.util.stream.Stream;
-
 @CommandDeclaration(command = "music",
         permission = "plots.music",
         usage = "/plot music",
@@ -57,30 +46,13 @@ import java.util.stream.Stream;
         requiredType = RequiredType.PLAYER)
 public class Music extends SubCommand {
 
-    private static final List<String> DISCS = Stream.of(
-            "music_disc_13",
-            "music_disc_cat",
-            "music_disc_blocks",
-            "music_disc_chirp",
-            "music_disc_far",
-            "music_disc_mall",
-            "music_disc_mellohi",
-            "music_disc_stal",
-            "music_disc_strad",
-            "music_disc_ward",
-            "music_disc_11",
-            "music_disc_wait",
-            "music_disc_otherside",
-            "music_disc_pigstep"
-    ).filter(s -> ItemTypes.get(s) != null).toList();
-
     private final EventDispatcher eventDispatcher;
     private final PlotInventoryProvider<?, ?> inventoryProvider;
 
     @Inject
     public Music(
-            final @NonNull EventDispatcher eventDispatcher, final
-    PlotInventoryProvider<?, ?> inventoryProvider
+            final @NonNull EventDispatcher eventDispatcher,
+            final PlotInventoryProvider<?, ?> inventoryProvider
     ) {
         this.eventDispatcher = eventDispatcher;
         this.inventoryProvider = inventoryProvider;
@@ -110,66 +82,7 @@ public class Music extends SubCommand {
             return true;
         }
 
-        final PlotInventory<?, ?> inventory = inventoryProvider.createInventory(
-                9 * 2,
-                TranslatableCaption.of("plotjukebox.jukebox_header")
-        );
-
-        for (final String disc : DISCS) {
-            PlotItemStack itemStack = new PlotItemStack(
-                    disc, 1, String.format("<gold>%s</gold>", disc),
-                    TranslatableCaption.of("plotjukebox.click_to_play").getComponent(player)
-            );
-            inventory.addItem(itemStack, (item, clicker) -> {
-                clicker.closeInventory();
-                PlotFlag<?, ?> plotFlag = plot.getFlagContainer().getFlag(MusicFlag.class)
-                        .createFlagInstance(item.getType());
-                PlotFlagAddEvent event = eventDispatcher.callFlagAdd(plotFlag, plot);
-                if (event.getEventResult() == Result.DENY) {
-                    clicker.sendMessage(
-                            TranslatableCaption.of("events.event_denied"),
-                            TagResolver.resolver("value", Tag.inserting(Component.text("Music addition")))
-                    );
-                    return;
-                }
-                plot.setFlag(event.getFlag());
-                clicker.sendMessage(
-                        TranslatableCaption.of("flag.flag_added"),
-                        TagResolver.builder()
-                                .tag("flag", Tag.inserting(Component.text("music")))
-                                .tag("value", Tag.inserting(Component.text(event.getFlag().getValue().toString())))
-                                .build()
-                );
-            });
-        }
-
-        PlotItemStack cancelItem = new PlotItemStack(
-                ItemTypes.BEDROCK, 1,
-                TranslatableCaption.of("plotjukebox.cancel_music").getComponent(player),
-                TranslatableCaption.of("plotjukebox.reset_music").getComponent(player)
-        );
-        inventory.setItem(inventory.size() - 1, cancelItem, (item, clicker) -> {
-            clicker.closeInventory();
-            PlotFlag<?, ?> plotFlag = plot.getFlagContainer().getFlag(MusicFlag.class)
-                    .createFlagInstance(item.getType());
-            PlotFlagRemoveEvent event = eventDispatcher.callFlagRemove(plotFlag, plot);
-            if (event.getEventResult() == Result.DENY) {
-                clicker.sendMessage(
-                        TranslatableCaption.of("events.event_denied"),
-                        TagResolver.resolver("value", Tag.inserting(Component.text("Music removal")))
-                );
-                return;
-            }
-            plot.removeFlag(event.getFlag());
-            clicker.sendMessage(
-                    TranslatableCaption.of("flag.flag_removed"),
-                    TagResolver.builder()
-                            .tag("flag", Tag.inserting(Component.text("music")))
-                            .tag("value", Tag.inserting(Component.text("music_disc")))
-                            .build()
-            );
-        });
-        inventory.open(player);
+        new PlotMusicInventory<>(inventoryProvider, player, plot, eventDispatcher).open();
         return true;
     }
 

Core/src/main/java/com/plotsquared/core/gui/PlotMusicInventory.java

@@ -0,0 +1,120 @@
+package com.plotsquared.core.gui;
+
+import com.plotsquared.core.configuration.caption.TranslatableCaption;
+import com.plotsquared.core.events.PlotFlagAddEvent;
+import com.plotsquared.core.events.PlotFlagRemoveEvent;
+import com.plotsquared.core.events.Result;
+import com.plotsquared.core.player.PlotPlayer;
+import com.plotsquared.core.plot.Plot;
+import com.plotsquared.core.plot.PlotItemStack;
+import com.plotsquared.core.plot.flag.PlotFlag;
+import com.plotsquared.core.plot.flag.implementations.MusicFlag;
+import com.plotsquared.core.util.EventDispatcher;
+import com.plotsquared.core.util.gui.ExtendablePlotInventory;
+import com.plotsquared.core.util.gui.PlotInventoryProvider;
+import com.sk89q.worldedit.world.item.ItemTypes;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.minimessage.tag.Tag;
+import net.kyori.adventure.text.minimessage.tag.resolver.TagResolver;
+
+import java.util.List;
+import java.util.stream.Stream;
+
+public class PlotMusicInventory<P, I> extends ExtendablePlotInventory<P, I> {
+
+    private static final List<String> DISCS = Stream.of(
+            "music_disc_13",
+            "music_disc_cat",
+            "music_disc_blocks",
+            "music_disc_chirp",
+            "music_disc_far",
+            "music_disc_mall",
+            "music_disc_mellohi",
+            "music_disc_stal",
+            "music_disc_strad",
+            "music_disc_ward",
+            "music_disc_11",
+            "music_disc_wait",
+            "music_disc_otherside",
+            "music_disc_pigstep"
+    ).filter(s -> ItemTypes.get(s) != null).toList();
+    private final Plot plot;
+    private final EventDispatcher eventDispatcher;
+
+    public PlotMusicInventory(
+            final PlotInventoryProvider<P, I> provider,
+            PlotPlayer<?> player,
+            Plot plot,
+            EventDispatcher eventDispatcher
+    ) {
+        super(
+                provider, player, 2 * 9,
+                TranslatableCaption.of("plotjukebox.jukebox_header")
+        );
+        this.plot = plot;
+        this.eventDispatcher = eventDispatcher;
+        setDiscs();
+        setCancelButton();
+    }
+
+    private void setDiscs() {
+        for (final String disc : DISCS) {
+            PlotItemStack itemStack = new PlotItemStack(
+                    disc, 1, String.format("<gold>%s</gold>", disc),
+                    TranslatableCaption.of("plotjukebox.click_to_play").getComponent(player())
+            );
+            addItem(itemStack, (item, type) -> {
+                close();
+                PlotFlag<?, ?> plotFlag = plot.getFlagContainer().getFlag(MusicFlag.class)
+                        .createFlagInstance(item.getType());
+                PlotFlagAddEvent event = eventDispatcher.callFlagAdd(plotFlag, plot);
+                if (event.getEventResult() == Result.DENY) {
+                    player().sendMessage(
+                            TranslatableCaption.of("events.event_denied"),
+                            TagResolver.resolver("value", Tag.inserting(Component.text("Music addition")))
+                    );
+                    return;
+                }
+                plot.setFlag(event.getFlag());
+                player().sendMessage(
+                        TranslatableCaption.of("flag.flag_added"),
+                        TagResolver.builder()
+                                .tag("flag", Tag.inserting(Component.text("music")))
+                                .tag("value", Tag.inserting(Component.text(event.getFlag().getValue().toString())))
+                                .build()
+                );
+            });
+        }
+    }
+
+
+    private void setCancelButton() {
+        PlotItemStack cancelItem = new PlotItemStack(
+                ItemTypes.BEDROCK, 1,
+                TranslatableCaption.of("plotjukebox.cancel_music").getComponent(player()),
+                TranslatableCaption.of("plotjukebox.reset_music").getComponent(player())
+        );
+        setItem(size() - 1, cancelItem, (item, type) -> {
+            close();
+            PlotFlag<?, ?> plotFlag = plot.getFlagContainer().getFlag(MusicFlag.class)
+                    .createFlagInstance(item.getType());
+            PlotFlagRemoveEvent event = eventDispatcher.callFlagRemove(plotFlag, plot);
+            if (event.getEventResult() == Result.DENY) {
+                player().sendMessage(
+                        TranslatableCaption.of("events.event_denied"),
+                        TagResolver.resolver("value", Tag.inserting(Component.text("Music removal")))
+                );
+                return;
+            }
+            plot.removeFlag(event.getFlag());
+            player().sendMessage(
+                    TranslatableCaption.of("flag.flag_removed"),
+                    TagResolver.builder()
+                            .tag("flag", Tag.inserting(Component.text("music")))
+                            .tag("value", Tag.inserting(Component.text("music_disc")))
+                            .build()
+            );
+        });
+    }
+
+}

Core/src/main/java/com/plotsquared/core/util/gui/ExtendablePlotInventory.java

@@ -0,0 +1,49 @@
+package com.plotsquared.core.util.gui;
+
+import com.plotsquared.core.configuration.caption.Caption;
+import com.plotsquared.core.player.PlotPlayer;
+import com.plotsquared.core.plot.PlotItemStack;
+import net.kyori.adventure.text.minimessage.tag.resolver.TagResolver;
+
+public class ExtendablePlotInventory<P, I> extends PlotInventory<P, I> {
+
+    private final PlotInventory<P, I> delegate;
+
+    public ExtendablePlotInventory(PlotInventory<P, I> delegate) {
+        super(delegate.player(), delegate.size(), delegate.titleCaption(), delegate.titleResolvers());
+        this.delegate = delegate;
+    }
+
+    public ExtendablePlotInventory(
+            PlotInventoryProvider<P, I> provider, PlotPlayer<?> player, int size, Caption title,
+            TagResolver... titleResolver
+    ) {
+        this(provider.createInventory(player, size, title, titleResolver));
+    }
+
+    @Override
+    public void setItem(final int slot, final PlotItemStack item, final PlotInventoryClickHandler onClick) {
+        delegate.setItem(slot, item, onClick);
+    }
+
+    @Override
+    public void addItem(final PlotItemStack item, final PlotInventoryClickHandler onClick) {
+        delegate.addItem(item, onClick);
+    }
+
+    @Override
+    public void open() {
+        delegate.open();
+    }
+
+    @Override
+    public void close() {
+        delegate.close();
+    }
+
+    @Override
+    public I toPlatformItem(final PlotItemStack item) {
+        return delegate.toPlatformItem(item);
+    }
+
+}

Core/src/main/java/com/plotsquared/core/util/gui/PlotInventory.java

@@ -37,9 +37,10 @@ import net.kyori.adventure.text.minimessage.tag.resolver.TagResolver;
  */
 public abstract class PlotInventory<P, I> {
 
-    private final PlotInventoryClickHandler<P> NOOP_CLICK_HANDLER = (x, y) -> {
+    private final PlotInventoryClickHandler NOOP_CLICK_HANDLER = (x, y) -> {
     };
 
+    private final PlotPlayer<P> player;
     private final int size;
     private final Caption titleCaption;
     private final TagResolver[] titleResolvers;
@@ -52,7 +53,8 @@ public abstract class PlotInventory<P, I> {
      * @param titleResolvers The tag resolvers to use for the title
      * @since 7.0.0
      */
-    protected PlotInventory(int size, Caption titleCaption, TagResolver... titleResolvers) {
+    protected PlotInventory(PlotPlayer<P> player, int size, Caption titleCaption, TagResolver... titleResolvers) {
+        this.player = player;
         this.size = size;
         this.titleCaption = titleCaption;
         this.titleResolvers = titleResolvers;
@@ -67,7 +69,7 @@ public abstract class PlotInventory<P, I> {
      * @param onClick The handler to call when clicking this item
      * @since TODO
      */
-    public abstract void setItem(int slot, PlotItemStack item, PlotInventoryClickHandler<P> onClick);
+    public abstract void setItem(int slot, PlotItemStack item, PlotInventoryClickHandler onClick);
 
     /**
      * Set an item in this inventory at a specific slot / index.
@@ -88,7 +90,7 @@ public abstract class PlotInventory<P, I> {
      * @param onClick The handler to call when clicking this item
      * @since TODO
      */
-    public abstract void addItem(PlotItemStack item, PlotInventoryClickHandler<P> onClick);
+    public abstract void addItem(PlotItemStack item, PlotInventoryClickHandler onClick);
 
     /**
      * Add an item to this inventory, at the first slot possible (first empty slot, or first slot with the exact same item)
@@ -101,28 +103,18 @@ public abstract class PlotInventory<P, I> {
     }
 
     /**
-     * Opens this inventory for a specific {@link PlotPlayer}
+     * Opens this inventory
      *
-     * @param player The player to open this inventory for
      * @since TODO
      */
-    public void open(PlotPlayer<?> player) {
-        this.openPlatformPlayer((PlotPlayer<P>) player);
-    }
-
-    protected abstract void openPlatformPlayer(PlotPlayer<P> player);
+    public abstract void open();
 
     /**
-     * Close this inventory for a specific {@link PlotPlayer}
+     * Close this inventory
      *
-     * @param player The player to close this inventory for
      * @since TODO
      */
-    public void close(PlotPlayer<?> player) {
-        this.closePlatformPlayer((PlotPlayer<P>) player);
-    }
-
-    protected abstract void closePlatformPlayer(PlotPlayer<P> player);
+    public abstract void close();
 
     public abstract I toPlatformItem(PlotItemStack item);
 
@@ -134,6 +126,14 @@ public abstract class PlotInventory<P, I> {
         return size;
     }
 
+    /**
+     * Get the associated player of this inventory
+     * @return {@link PlotPlayer}
+     */
+    public PlotPlayer<P> player() {
+        return player;
+    }
+
     protected Caption titleCaption() {
         return titleCaption;
     }

Core/src/main/java/com/plotsquared/core/util/gui/PlotInventoryClickHandler.java

@@ -25,11 +25,10 @@
  */
 package com.plotsquared.core.util.gui;
 
-import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.PlotItemStack;
 
-public interface PlotInventoryClickHandler<P> {
+public interface PlotInventoryClickHandler {
 
-    void handle(PlotItemStack itemStack, PlotPlayer<P> plotPlayer);
+    void handle(PlotItemStack itemStack, PlotInventoryClickType clickType);
 
 }

Core/src/main/java/com/plotsquared/core/util/gui/PlotInventoryClickType.java

@@ -0,0 +1,12 @@
+package com.plotsquared.core.util.gui;
+
+public enum PlotInventoryClickType {
+
+    LEFT,
+    SHIFT_LEFT,
+    RIGHT,
+    SHIFT_RIGHT,
+    MIDDLE,
+    OTHER
+
+}

Core/src/main/java/com/plotsquared/core/util/gui/PlotInventoryProvider.java

@@ -26,6 +26,7 @@
 package com.plotsquared.core.util.gui;
 
 import com.plotsquared.core.configuration.caption.Caption;
+import com.plotsquared.core.player.PlotPlayer;
 import net.kyori.adventure.text.minimessage.tag.resolver.TagResolver;
 
 /**
@@ -44,6 +45,6 @@ public interface PlotInventoryProvider<P, I> {
      * @param titleResolvers The (optional) placeholder resolvers for the inventory
      * @return The platform inventory
      */
-    PlotInventory<P, I> createInventory(int size, Caption titleCaption, TagResolver... titleResolvers);
+    PlotInventory<P, I> createInventory(PlotPlayer<?> player, int size, Caption titleCaption, TagResolver... titleResolvers);
 
 }