Support for custom inventories

src/main/java/de/shiewk/smoderation/SModeration.java

@@ -3,6 +3,7 @@ package de.shiewk.smoderation;
 import de.shiewk.smoderation.command.BanCommand;
 import de.shiewk.smoderation.command.KickCommand;
 import de.shiewk.smoderation.command.MuteCommand;
+import de.shiewk.smoderation.event.CustomInventoryEvents;
 import de.shiewk.smoderation.listener.PunishmentListener;
 import de.shiewk.smoderation.storage.PunishmentContainer;
 import org.bukkit.command.PluginCommand;
@@ -23,6 +24,7 @@ public final class SModeration extends JavaPlugin {
     @Override
     public void onEnable() {
         getPluginManager().registerEvents(new PunishmentListener(), this);
+        getPluginManager().registerEvents(new CustomInventoryEvents(), this);
 
         final PluginCommand mute = getCommand("mute");
         assert mute != null;

src/main/java/de/shiewk/smoderation/event/CustomInventoryEvents.java

@@ -0,0 +1,17 @@
+package de.shiewk.smoderation.event;
+
+import de.shiewk.smoderation.inventory.CustomInventory;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.InventoryClickEvent;
+
+public class CustomInventoryEvents implements Listener {
+    @EventHandler(priority = EventPriority.HIGH, ignoreCancelled = true)
+    public void onInventoryClick(InventoryClickEvent event){
+        if (event.getInventory().getHolder() instanceof CustomInventory customInventory){
+            customInventory.click(event.getCurrentItem());
+            event.setCancelled(true);
+        }
+    }
+}

src/main/java/de/shiewk/smoderation/inventory/CustomInventory.java

@@ -0,0 +1,24 @@
+package de.shiewk.smoderation.inventory;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.TextDecoration;
+import org.bukkit.Material;
+import org.bukkit.inventory.InventoryHolder;
+import org.bukkit.inventory.ItemStack;
+
+public interface CustomInventory extends InventoryHolder {
+
+    void refresh();
+    void open();
+    void click(ItemStack stack);
+
+    default ItemStack createEmptyStack(){
+        ItemStack stack = new ItemStack(Material.BLACK_STAINED_GLASS_PANE);
+        stack.editMeta(meta -> meta.displayName(Component.empty()));
+        return stack;
+    }
+
+    default Component applyFormatting(Component component){
+        return component.decoration(TextDecoration.ITALIC, false);
+    }
+}

src/main/java/de/shiewk/smoderation/inventory/PageableCustomInventory.java

@@ -0,0 +1,66 @@
+package de.shiewk.smoderation.inventory;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.format.TextColor;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+
+public abstract class PageableCustomInventory implements CustomInventory {
+    public abstract int lastPage();
+    public abstract void switchPage();
+    private ItemStack previousStack = null;
+    private ItemStack nextStack = null;
+    private int page = 0;
+
+    public int getPage(){
+        return page;
+    }
+
+    @Override
+    public void click(ItemStack stack) {
+        if (stack != null){
+            if (stack.equals(previousStack)){
+                previousPage();
+            } else if (stack.equals(nextStack)) {
+                nextPage();
+            }
+        }
+    }
+
+    public void nextPage(){
+        if (page < lastPage()){
+            page++;
+            switchPage();
+            refresh();
+        }
+    }
+
+    public void previousPage(){
+        if (page > 0){
+            page--;
+            switchPage();
+            refresh();
+        }
+    }
+
+    public ItemStack createPreviousPageStack(){
+        boolean allowed = page > 0;
+        TextColor color = allowed ? NamedTextColor.GREEN : NamedTextColor.RED;
+        int skip = allowed ? page : page+1;
+        ItemStack stack = new ItemStack(allowed ? Material.GREEN_STAINED_GLASS_PANE : Material.RED_STAINED_GLASS_PANE);
+        stack.editMeta(meta -> meta.displayName(applyFormatting(Component.text("Previous page (%s/%s)".formatted(skip, lastPage()+1)).color(color))));
+        previousStack = stack;
+        return stack;
+    }
+
+    public ItemStack createNextPageStack(){
+        boolean allowed = page < lastPage();
+        TextColor color = allowed ? NamedTextColor.GREEN : NamedTextColor.RED;
+        int skip = allowed ? page+2 : page+1;
+        ItemStack stack = new ItemStack(allowed ? Material.GREEN_STAINED_GLASS_PANE : Material.RED_STAINED_GLASS_PANE);
+        stack.editMeta(meta -> meta.displayName(applyFormatting(Component.text("Next page (%s/%s)".formatted(skip, lastPage()+1)).color(color))));
+        nextStack = stack;
+        return stack;
+    }
+}