Add more specific platform support messages

Essentials/src/com/earth2me/essentials/Essentials.java

@@ -214,8 +214,16 @@ public class Essentials extends JavaPlugin implements net.ess3.api.IEssentials {
 
             Console.setInstance(this);
 
-            if (!VersionUtil.isServerSupported()) {
-                getLogger().severe(tl("serverUnsupported"));
+            switch (VersionUtil.getServerSupportStatus()) {
+                case UNSTABLE:
+                    getLogger().severe(tl("serverUnsupportedMods"));
+                    break;
+                case OUTDATED:
+                    getLogger().severe(tl("serverUnsupported"));
+                    break;
+                case LIMITED:
+                    getLogger().info(tl("serverUnsupportedLimitedApi"));
+                    break;
             }
 
             final PluginManager pm = getServer().getPluginManager();

Essentials/src/com/earth2me/essentials/commands/Commandessentials.java

@@ -314,11 +314,20 @@ public class Commandessentials extends EssentialsCommand {
         boolean isMismatched = false;
         boolean isVaultInstalled = false;
         boolean isUnsupported = false;
-        final boolean isServerSupported = VersionUtil.isServerSupported();
+        final VersionUtil.SupportStatus supportStatus = VersionUtil.getServerSupportStatus();
         final PluginManager pm = server.getPluginManager();
         final String essVer = pm.getPlugin("Essentials").getDescription().getVersion();
 
-        sender.sendMessage(tl(isServerSupported ? "versionOutputFine" : "versionOutputWarn", "Server", server.getBukkitVersion() + " " + server.getVersion()));
+        final String serverMessageKey;
+        if (supportStatus.isSupported()) {
+            serverMessageKey = "versionOutputFine";
+        } else if (supportStatus == VersionUtil.SupportStatus.UNSTABLE) {
+            serverMessageKey = "versionOutputUnsupported";
+        } else {
+            serverMessageKey = "versionOutputWarn";
+        }
+
+        sender.sendMessage(tl(serverMessageKey, "Server", server.getBukkitVersion() + " " + server.getVersion()));
         sender.sendMessage(tl("versionOutputFine", "EssentialsX", essVer));
 
         for (final Plugin plugin : pm.getPlugins()) {
@@ -366,8 +375,16 @@ public class Commandessentials extends EssentialsCommand {
             sender.sendMessage(tl("versionOutputUnsupportedPlugins"));
         }
 
-        if (!VersionUtil.isServerSupported()) {
-            sender.sendMessage(tl("serverUnsupported"));
+        switch (supportStatus) {
+            case UNSTABLE:
+                sender.sendMessage(tl("serverUnsupportedMods"));
+                break;
+            case OUTDATED:
+                sender.sendMessage(tl("serverUnsupported"));
+                break;
+            case LIMITED:
+                sender.sendMessage(tl("serverUnsupportedLimitedApi"));
+                break;
         }
     }
 

Essentials/src/com/earth2me/essentials/utils/VersionUtil.java

@@ -3,6 +3,7 @@ package com.earth2me.essentials.utils;
 import com.google.common.base.Objects;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableSet;
+import io.papermc.lib.PaperLib;
 import org.bukkit.Bukkit;
 
 import java.util.Set;
@@ -44,8 +45,22 @@ public final class VersionUtil {
         return serverVersion;
     }
 
+    public static SupportStatus getServerSupportStatus() {
+        try {
+            Class.forName("net.minecraftforge.common.MinecraftForge");
+            return SupportStatus.UNSTABLE;
+        } catch (final ClassNotFoundException ignored) {
+        }
+
+        if (!supportedVersions.contains(getServerBukkitVersion())) {
+            return SupportStatus.OUTDATED;
+        }
+
+        return PaperLib.isPaper() ? SupportStatus.FULL : SupportStatus.LIMITED;
+    }
+
     public static boolean isServerSupported() {
-        return supportedVersions.contains(getServerBukkitVersion());
+        return getServerSupportStatus().isSupported();
     }
 
     public static final class BukkitVersion implements Comparable<BukkitVersion> {
@@ -188,4 +203,22 @@ public final class VersionUtil {
             }
         }
     }
+
+    public enum SupportStatus {
+        FULL(true),
+        LIMITED(true),
+        UNSTABLE(false),
+        OUTDATED(false)
+        ;
+
+        private final boolean supported;
+
+        SupportStatus(final boolean supported) {
+            this.supported = supported;
+        }
+
+        public boolean isSupported() {
+            return supported;
+        }
+    }
 }

Essentials/src/messages.properties

@@ -706,6 +706,8 @@ serverFull=Server is full\!
 serverReloading=There's a good chance you're reloading your server right now. If that's the case, why do you hate yourself? Expect no support from the EssentialsX team when using /reload.
 serverTotal=\u00a76Server Total\:\u00a7c {0}
 serverUnsupported=You are running an unsupported server version!
+serverUnsupportedLimitedApi=You are running a server with limited API functionality. EssentialsX will still work, but certain features may be disabled.
+serverUnsupportedMods=You are running a server that does not properly support Bukkit plugins. Bukkit plugins should not be used with Forge mods! Consider using ForgeEssentials, or SpongeForge + Nucleus.
 setBal=\u00a7aYour balance was set to {0}.
 setBalOthers=\u00a7aYou set {0}\u00a7a''s balance to {1}.
 setSpawner=\u00a76Changed spawner type to\u00a7c {0}\u00a76.