[FEAT] Paper Support

Paper/src/main/java/com/hypherionmc/craterlib/common/PaperCommonHelper.java

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+package com.hypherionmc.craterlib.common;
+
+import com.hypherionmc.craterlib.core.platform.CommonPlatform;
+import com.hypherionmc.craterlib.nojang.server.BridgedMinecraftServer;
+import net.minecraft.server.MinecraftServer;
+
+/**
+ * @author HypherionSA
+ */
+public class PaperCommonHelper implements CommonPlatform {
+
+    public PaperCommonHelper() {
+    }
+
+    @Override
+    public BridgedMinecraftServer getMCServer() {
+        return BridgedMinecraftServer.of(MinecraftServer.getServer());
+    }
+}

Paper/src/main/java/com/hypherionmc/craterlib/common/PaperCompatHelper.java

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+package com.hypherionmc.craterlib.common;
+
+import com.hypherionmc.craterlib.core.platform.CompatUtils;
+import com.hypherionmc.craterlib.core.platform.ModloaderEnvironment;
+import com.hypherionmc.craterlib.nojang.world.entity.player.BridgedPlayer;
+import com.hypherionmc.craterlib.utils.ChatUtils;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.metadata.MetadataValue;
+import org.bukkit.plugin.Plugin;
+
+import java.lang.reflect.Method;
+
+public class PaperCompatHelper implements CompatUtils {
+
+    @Override
+    public boolean isPlayerActive(BridgedPlayer player) {
+        // Essentials Vanish
+        if (ModloaderEnvironment.INSTANCE.isModLoaded("Essentials")) {
+            return !isEssentialsVanished(player);
+        }
+
+        // PhantomAdmin Vanish
+        if (ModloaderEnvironment.INSTANCE.isModLoaded("PhantomAdmin"))
+            return !isPhantomVanished(player);
+
+        // Other vanish mods
+        try {
+            Player p = (Player) player.toMojangServerPlayer();
+            for (MetadataValue meta : p.getMetadata("vanished")) {
+                if (meta.asBoolean()) return true;
+            }
+        } catch (Exception ignored) {}
+
+        return true;
+    }
+
+    @Override
+    public String getSkinUUID(BridgedPlayer player) {
+        return player.getStringUUID();
+    }
+
+    private boolean isEssentialsVanished(BridgedPlayer player) {
+        try {
+            Plugin p = Bukkit.getPluginManager().getPlugin("Essentials");
+            if (p == null)
+                return false;
+
+            Method getUser = p.getClass().getMethod("getUser", String.class);
+            Object essentialsPlayer = getUser.invoke(p, ChatUtils.resolve(player.getName(), false));
+
+            if (essentialsPlayer != null) {
+                Method isVanished = essentialsPlayer.getClass().getMethod("isVanished");
+                return (boolean) isVanished.invoke(essentialsPlayer);
+            }
+        } catch (Exception ignored) {}
+
+        return false;
+    }
+
+    private boolean isPhantomVanished(BridgedPlayer player) {
+        try {
+            Plugin p = Bukkit.getPluginManager().getPlugin("PhantomAdmin");
+            if (p == null)
+                return false;
+
+            Method isInvisible = p.getClass().getDeclaredMethod("isInvisible", Player.class);
+            isInvisible.setAccessible(true);
+
+            return (boolean) isInvisible.invoke(p, (Player) player.toMojangServerPlayer());
+        } catch (Exception ignored) {
+            ignored.printStackTrace();
+        }
+
+        return false;
+    }
+
+}

Paper/src/main/java/com/hypherionmc/craterlib/common/PaperLoaderHelper.java

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+package com.hypherionmc.craterlib.common;
+
+import com.hypherionmc.craterlib.core.platform.Environment;
+import com.hypherionmc.craterlib.core.platform.LoaderType;
+import com.hypherionmc.craterlib.core.platform.ModloaderEnvironment;
+import net.minecraft.SharedConstants;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.Plugin;
+
+import java.io.File;
+import java.util.Arrays;
+
+/**
+ * @author HypherionSA
+ */
+public class PaperLoaderHelper implements ModloaderEnvironment {
+
+    public PaperLoaderHelper() {
+    }
+
+    @Override
+    public boolean isFabric() {
+        return false;
+    }
+
+    @Override
+    public LoaderType getLoaderType() {
+        return LoaderType.PAPER;
+    }
+
+    @Override
+    public String getGameVersion() {
+        return SharedConstants.getCurrentVersion().getName();
+    }
+
+    @Override
+    public File getGameFolder() {
+        return new File(".");
+    }
+
+    @Override
+    public File getConfigFolder() {
+        return new File("config");
+    }
+
+    @Override
+    public File getModsFolder() {
+        return Bukkit.getPluginsFolder();
+    }
+
+    @Override
+    public Environment getEnvironment() {
+        return Environment.SERVER;
+    }
+
+    @Override
+    public boolean isModLoaded(String modid) {
+        return Bukkit.getPluginManager().isPluginEnabled(modid);
+    }
+
+    @Override
+    public boolean isDevEnv() {
+        return false;
+    }
+
+    @Override
+    public int getModCount() {
+        return (int) Arrays.stream(Bukkit.getPluginManager().getPlugins()).filter(Plugin::isEnabled).count();
+    }
+}