feat: re-add paper api but compile for java 8

Author: iGabyTM

build.gradle.kts

@@ -8,12 +8,12 @@ version = "2.7.2"
 
 repositories {
     mavenCentral()
-    maven("https://hub.spigotmc.org/nexus/content/repositories/snapshots/")
+    maven("https://papermc.io/repo/repository/maven-public/")
     maven("https://repo.extendedclip.com/content/repositories/placeholderapi/")
 }
 
 dependencies {
-    compileOnly("org.spigotmc:spigot-api:1.17.1-R0.1-SNAPSHOT")
+    compileOnly("io.papermc.paper:paper-api:1.20.6-R0.1-SNAPSHOT")
     compileOnly("me.clip:placeholderapi:2.11.3")
 }
 
@@ -23,6 +23,10 @@ tasks {
             attributes["Implementation-Title"] = "server"
             attributes["Implementation-Version"] = project.version
         }
+    }
+
+    java {
+        disableAutoTargetJvm()
         targetCompatibility = JavaVersion.VERSION_1_8
         sourceCompatibility = JavaVersion.VERSION_1_8
     }

src/main/java/at/helpch/placeholderapi/expansion/server/util/ServerUtil.java

@@ -17,7 +17,7 @@ public final class ServerUtil {
     // TPS stuff
     private static final Object craftServer;
     private static final Field tpsField;
-    private static Method getTpsMethod; // Paper and its forks have Bukkit#getTPS
+    private static boolean hasTpsMethod; // Paper and its forks have Bukkit#getTps
     // ----
 
     private static final String variant;
@@ -86,7 +86,8 @@ private static Object getCraftServer() {
 
     private static Field getTpsHandler() {
         try {
-            getTpsMethod = Bukkit.class.getMethod("getTPS");
+            Bukkit.class.getMethod("getTPS");
+            hasTpsMethod = true;
             return null;
         } catch (NoSuchMethodException ignored) { }
 
@@ -148,12 +149,8 @@ public static String getBuild() {
     }
 
     public static double[] getTps() {
-        if (getTpsMethod != null) {
-            try {
-                return (double[]) getTpsMethod.invoke(null);
-            } catch (IllegalAccessException | InvocationTargetException ignored) {
-                return new double[]{0, 0, 0};
-            }
+        if (hasTpsMethod) {
+            return Bukkit.getTPS();
         }
 
         if (craftServer == null || tpsField == null) {
@@ -183,8 +180,9 @@ private static String getVariant0() {
 
     private static String getBuild0() {
         OptionalInt buildNumber = ServerBuildInfo.buildInfo().buildNumber();
-        if (buildNumber.isEmpty())
+        if (!buildNumber.isPresent()) {
             return "Unknown";
+        }
 
         return String.valueOf(buildNumber.getAsInt());
     }

src/main/java/at/helpch/placeholderapi/expansion/server/util/VersionHelper.java

@@ -96,9 +96,11 @@ private static String getMinecraftVersion() {
         if (IS_PAPER) {
             try {
                 // Paper method from 2020 - returns the version like 1.20.1
-                final Method method = Bukkit.class.getDeclaredMethod("getMinecraftVersion");
-                return (String) method.invoke(Bukkit.getServer());
-            } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException ignored) { }
+                return Bukkit.getMinecraftVersion();
+            } catch (NoSuchMethodError ignored) {
+                // The version is formatted as 1.20.1-R0.1-SNAPSHOT
+                return Bukkit.getBukkitVersion().split("-")[0];
+            }
         }
 
         // The version is formatted as 1.20.1-R0.1-SNAPSHOT