Started working on Folia support

build.gradle.kts

@@ -26,7 +26,7 @@ dependencies {
     implementation("org.bstats:bstats-bukkit:3.0.1")
     implementation("net.kyori:adventure-platform-bukkit:4.3.0")
 
-    compileOnly("org.spigotmc:spigot-api:1.19-R0.1-SNAPSHOT")
+    compileOnlyApi("dev.folia:folia-api:1.19.4-R0.1-SNAPSHOT") // this is temp
     compileOnlyApi("org.jetbrains:annotations:23.0.0")
 
     testImplementation("org.openjdk.jmh:jmh-core:1.32")
@@ -38,8 +38,8 @@ dependencies {
 
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_1_8
+    sourceCompatibility = JavaVersion.VERSION_17 // this is temp
-    targetCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_17 // this is temp
 
     withJavadocJar()
     withSourcesJar()

src/main/java/me/clip/placeholderapi/PlaceholderAPIPlugin.java

@@ -162,7 +162,7 @@ public final class PlaceholderAPIPlugin extends JavaPlugin {
 
     HandlerList.unregisterAll(this);
 
-    Bukkit.getScheduler().cancelTasks(this);
+    Bukkit.getAsyncScheduler().cancelTasks(this); // this is hopefully temp
 
     adventure.close();
     adventure = null;

src/main/java/me/clip/placeholderapi/expansion/manager/CloudExpansionManager.java

@@ -203,13 +203,7 @@ public final class CloudExpansionManager {
             plugin.getLogger().log(Level.WARNING, "Failed to download expansion information", e);
           }
 
-          // loop thru what's left on the main thread
+          //todo: Figure out why this was being scheduled back on the main thread
-          plugin
-              .getServer()
-              .getScheduler()
-              .runTask(
-                  plugin,
-                  () -> {
           try {
             for (Map.Entry<String, CloudExpansion> entry : values.entrySet()) {
               String name = entry.getKey();
@@ -237,7 +231,6 @@ public final class CloudExpansionManager {
                     .log(Level.WARNING, "Failed to download expansion information", e);
           }
         });
-        });
   }
 
   public boolean isDownloading(@NotNull final CloudExpansion expansion) {

src/main/java/me/clip/placeholderapi/expansion/manager/LocalExpansionManager.java

@@ -269,12 +269,13 @@ public final class LocalExpansionManager implements Listener {
       return false;
     }
 
-    final ExpansionRegisterEvent event = new ExpansionRegisterEvent(expansion);
+// this is temp
-    Bukkit.getPluginManager().callEvent(event);
+//    final ExpansionRegisterEvent event = new ExpansionRegisterEvent(expansion);
-
+//    Bukkit.getPluginManager().callEvent(event);
-    if (event.isCancelled()) {
+//
-      return false;
+//    if (event.isCancelled()) {
-    }
+//      return false;
+//    }
 
     expansionsLock.lock();
     try {

src/main/java/me/clip/placeholderapi/updatechecker/UpdateChecker.java

@@ -24,6 +24,7 @@ import java.io.BufferedReader;
 import java.io.InputStreamReader;
 import java.net.URL;
 import java.util.Arrays;
+import java.util.concurrent.CompletableFuture;
 import javax.net.ssl.HttpsURLConnection;
 import me.clip.placeholderapi.PlaceholderAPIPlugin;
 import me.clip.placeholderapi.util.Msg;
@@ -54,8 +55,10 @@ public class UpdateChecker implements Listener {
     return spigotVersion;
   }
 
+  //todo: Figure out a better approach for this?
   public void fetch() {
-    Bukkit.getScheduler().runTaskAsynchronously(plugin, () -> {
+    CompletableFuture<Boolean> update = new CompletableFuture<>();
+    CompletableFuture.supplyAsync(() -> {
       try {
         HttpsURLConnection con = (HttpsURLConnection) new URL(
                 "https://api.spigotmc.org/legacy/update.php?resource=" + RESOURCE_ID).openConnection();
@@ -63,26 +66,32 @@ public class UpdateChecker implements Listener {
         spigotVersion = new BufferedReader(new InputStreamReader(con.getInputStream())).readLine();
       } catch (Exception ex) {
         plugin.getLogger().info("Failed to check for updates on spigot.");
-        return;
+        return false;
       }
 
       if (spigotVersion == null || spigotVersion.isEmpty()) {
-        return;
+        plugin.getLogger().info("Failed to check for updates on spigot.");
+        return false;
       }
 
       updateAvailable = spigotIsNewer();
 
       if (!updateAvailable) {
-        return;
+        plugin.getLogger().info("PlaceholderAPI is up to date.");
+        return false;
       }
 
-      Bukkit.getScheduler().runTask(plugin, () -> {
+      return true;
+    });
+
+    update.whenComplete((result, error) -> {
+      if (result) {
         plugin.getLogger()
                 .info("An update for PlaceholderAPI (v" + getSpigotVersion() + ") is available at:");
         plugin.getLogger()
                 .info("https://www.spigotmc.org/resources/placeholderapi." + RESOURCE_ID + "/");
-        Bukkit.getPluginManager().registerEvents(this, plugin);
+        Bukkit.getPluginManager().registerEvents(UpdateChecker.this, plugin);
-      });
+      }
     });
   }
 

src/main/java/me/clip/placeholderapi/util/Futures.java

@@ -40,11 +40,7 @@ public final class Futures {
       @NotNull final CompletableFuture<T> future,
       @NotNull final BiConsumer<T, Throwable> consumer) {
     future.whenComplete((value, exception) -> {
-      if (Bukkit.isPrimaryThread()) {
       consumer.accept(value, exception);
-      } else {
-        Bukkit.getScheduler().runTask(plugin, () -> consumer.accept(value, exception));
-      }
     });
   }
 

src/main/resources/plugin.yml

@@ -4,6 +4,8 @@ main: "me.clip.placeholderapi.PlaceholderAPIPlugin"
 version: ${version}
 author: HelpChat
 
+folia-supported: true
+
 api-version: "1.13"
 description: "An awesome placeholder provider!"