feat: support folia

build.gradle

@@ -8,13 +8,13 @@ compileJava.options.encoding = 'UTF-8'
 
 java {
     toolchain {
-        languageVersion.set(JavaLanguageVersion.of(8))
+        languageVersion.set(JavaLanguageVersion.of(21))
     }
 }
 
 repositories {
     mavenCentral()
-    maven { url 'https://hub.spigotmc.org/nexus/content/repositories/snapshots' }
+    maven { url 'https://repo.papermc.io/repository/maven-public/' }
     maven { url 'https://oss.sonatype.org/content/repositories/snapshots' }
     maven { url 'https://jitpack.io' }
     maven { url 'https://repo.skriptlang.org/releases' }
@@ -23,7 +23,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'org.spigotmc:spigot-api:1.13.2-R0.1-SNAPSHOT'
+    implementation 'io.papermc.paper:paper-api:1.20.6-R0.1-SNAPSHOT'
     implementation ('com.github.SkriptLang:Skript:2.7.3') {
         transitive = false
     }

src/main/java/io/github/apickledwalrus/skriptplaceholders/placeholder/PlaceholderPlugin.java

@@ -1,7 +1,7 @@
 package io.github.apickledwalrus.skriptplaceholders.placeholder;
 
 import ch.njol.skript.Skript;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.bukkit.OfflinePlayer;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.Plugin;

src/main/java/io/github/apickledwalrus/skriptplaceholders/skript/elements/StructCustomPlaceholder.java

@@ -122,8 +122,8 @@ public boolean load() {
 		if (Bukkit.isPrimaryThread()) {
 			registry.registerPlaceholder(plugin, placeholder, this);
 		} else {
-			Bukkit.getScheduler().runTask(SkriptPlaceholders.getInstance(),
-					() -> registry.registerPlaceholder(plugin, placeholder, this)
+			Bukkit.getGlobalRegionScheduler().run(SkriptPlaceholders.getInstance(),
+					(ignored) -> registry.registerPlaceholder(plugin, placeholder, this)
 			);
 		}
 
@@ -136,8 +136,8 @@ public void unload() {
 		if (Bukkit.isPrimaryThread()) {
 			registry.unregisterPlaceholder(plugin, placeholder, this);
 		} else {
-			Bukkit.getScheduler().runTask(SkriptPlaceholders.getInstance(),
-					() -> registry.unregisterPlaceholder(plugin, placeholder, this)
+			Bukkit.getGlobalRegionScheduler().run(SkriptPlaceholders.getInstance(),
+					(ignored) -> registry.unregisterPlaceholder(plugin, placeholder, this)
 			);
 		}
 	}

src/main/resources/plugin.yml

@@ -5,4 +5,5 @@ version: @version@
 authors: [APickledWalrus, Pikachu920]
 description: Allows using and registering placeholders with PlaceholderAPI and MVdWPlaceholderAPI in Skript.
 website: https://github.com/APickledWalrus/skript-placeholders
+folia-supported: true
 softdepend: [Skript, PlaceholderAPI, MVdWPlaceholderAPI]