feature: add a miniplaceholders expansion

Bukkit/build.gradle.kts

@@ -41,6 +41,7 @@ dependencies {
     compileOnly(libs.luckperms)
     compileOnly(libs.essentialsx)
     compileOnly(libs.mvdwapi) { isTransitive = false }
+    compileOnly(libs.miniplaceholders) { isTransitive = false }
 
     // Other libraries
     implementation(libs.squirrelid) { isTransitive = false }

Bukkit/src/main/java/com/plotsquared/bukkit/listener/ServerListener.java

@@ -21,6 +21,7 @@ package com.plotsquared.bukkit.listener;
 import com.google.inject.Inject;
 import com.plotsquared.bukkit.BukkitPlatform;
 import com.plotsquared.bukkit.placeholder.MVdWPlaceholders;
+import com.plotsquared.bukkit.placeholder.MiniPlaceholders;
 import com.plotsquared.bukkit.util.BukkitEconHandler;
 import com.plotsquared.core.PlotSquared;
 import com.plotsquared.core.configuration.Settings;
@@ -52,6 +53,11 @@ public class ServerListener implements Listener {
             new MVdWPlaceholders(this.plugin, this.plugin.placeholderRegistry());
             ConsolePlayer.getConsole().sendMessage(TranslatableCaption.of("placeholder.hooked"));
         }
+        if (Bukkit.getPluginManager().getPlugin("MiniPlaceholders") != null
+                && Settings.Enabled_Components.USE_MINIPLACEHOLDERS) {
+            new MiniPlaceholders(this.plugin.placeholderRegistry());
+            ConsolePlayer.getConsole().sendMessage(TranslatableCaption.of("placeholder.miniplaceholders.hooked"));
+        }
         if (Settings.Enabled_Components.ECONOMY && Bukkit.getPluginManager().isPluginEnabled("Vault")) {
             EconHandler econHandler = new BukkitEconHandler();
             try {

Bukkit/src/main/java/com/plotsquared/bukkit/placeholder/MiniPlaceholders.java

@@ -0,0 +1,69 @@
+/*
+ * PlotSquared, a land and world management plugin for Minecraft.
+ * Copyright (C) IntellectualSites <https://intellectualsites.com>
+ * Copyright (C) IntellectualSites team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.bukkit.placeholder;
+
+import com.google.common.eventbus.Subscribe;
+import com.plotsquared.bukkit.util.BukkitUtil;
+import com.plotsquared.core.PlotSquared;
+import com.plotsquared.core.player.ConsolePlayer;
+import com.plotsquared.core.player.PlotPlayer;
+import com.plotsquared.core.util.placeholders.Placeholder;
+import com.plotsquared.core.util.placeholders.PlaceholderRegistry;
+import io.github.miniplaceholders.api.Expansion;
+import io.github.miniplaceholders.api.utils.TagsUtils;
+import org.bukkit.entity.Player;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+public final class MiniPlaceholders {
+
+    private Expansion expansion = null;
+    private final PlaceholderRegistry registry;
+
+    public MiniPlaceholders(final @NonNull PlaceholderRegistry registry) {
+        this.registry = registry;
+        this.createExpansion();
+        PlotSquared.get().getEventDispatcher().registerListener(this);
+    }
+
+    @Subscribe
+    public void onNewPlaceholder(final PlaceholderRegistry.@NonNull PlaceholderAddedEvent event) {
+        // We cannot register placeholders on the fly, so we have to replace the expansion.
+        this.createExpansion();
+    }
+
+    private synchronized void createExpansion() {
+        if (this.expansion != null && this.expansion.registered()) {
+            this.expansion.unregister();
+        }
+        final Expansion.Builder builder = Expansion.builder("plotsquared");
+        for (final Placeholder placeholder : this.registry.getPlaceholders()) {
+            builder.audiencePlaceholder(placeholder.getKey(), (audience, argumentQueue, context) -> {
+                final PlotPlayer<?> plotPlayer;
+                if (audience instanceof Player player) {
+                    plotPlayer = BukkitUtil.adapt(player);
+                } else {
+                    plotPlayer = ConsolePlayer.getConsole();
+                }
+                return TagsUtils.staticTag(placeholder.getValue(plotPlayer));
+            });
+        }
+        this.expansion = builder.build();
+        this.expansion.register();
+    }
+}