#1531 Move spigot detection to BukkitService (#1534)

src/main/java/fr/xephi/authme/service/BukkitService.java

@@ -12,6 +12,7 @@ import org.bukkit.Bukkit;
 import org.bukkit.OfflinePlayer;
 import org.bukkit.World;
 import org.bukkit.command.CommandSender;
+import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Event;
 import org.bukkit.scheduler.BukkitRunnable;
@@ -25,6 +26,7 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Date;
+import java.util.Optional;
 import java.util.Set;
 import java.util.function.Function;
 
@@ -376,4 +378,19 @@ public class BukkitService implements SettingsDependent {
     public BanEntry banIp(String ip, String reason, Date expires, String source) {
         return Bukkit.getServer().getBanList(BanList.Type.IP).addBan(ip, reason, expires, source);
     }
+
+    /**
+     * Returns an optional with a boolean indicating whether bungeecord is enabled or not if the
+     * server implementation is Spigot. Otherwise returns an empty optional.
+     *
+     * @return Optional with configuration value for Spigot, empty optional otherwise
+     */
+    public Optional<Boolean> isBungeeCordConfiguredForSpigot() {
+        try {
+            YamlConfiguration spigotConfig = Bukkit.spigot().getConfig();
+            return Optional.of(spigotConfig.getBoolean("settings.bungeecord"));
+        } catch (NoSuchMethodError e) {
+            return Optional.empty();
+        }
+    }
 }

src/main/java/fr/xephi/authme/settings/SettingsWarner.java

@@ -4,15 +4,15 @@ import fr.xephi.authme.AuthMe;
 import fr.xephi.authme.ConsoleLogger;
 import fr.xephi.authme.security.HashAlgorithm;
 import fr.xephi.authme.security.crypts.Argon2;
+import fr.xephi.authme.service.BukkitService;
 import fr.xephi.authme.settings.properties.EmailSettings;
 import fr.xephi.authme.settings.properties.HooksSettings;
 import fr.xephi.authme.settings.properties.PluginSettings;
 import fr.xephi.authme.settings.properties.RestrictionSettings;
 import fr.xephi.authme.settings.properties.SecuritySettings;
-import fr.xephi.authme.util.Utils;
-import org.bukkit.Bukkit;
 
 import javax.inject.Inject;
+import java.util.Optional;
 
 /**
  * Logs warning messages in cases where the configured values suggest a misconfiguration.
@@ -29,6 +29,9 @@ public class SettingsWarner {
     @Inject
     private AuthMe authMe;
 
+    @Inject
+    private BukkitService bukkitService;
+
     SettingsWarner() {
     }
 
@@ -54,7 +57,7 @@ public class SettingsWarner {
         }
 
         // Warn if spigot.yml has settings.bungeecord set to true but config.yml has Hooks.bungeecord set to false
-        if (Utils.isSpigot() && Bukkit.spigot().getConfig().getBoolean("settings.bungeecord")
+        if (isTrue(bukkitService.isBungeeCordConfiguredForSpigot())
             && !settings.getProperty(HooksSettings.BUNGEECORD)) {
             ConsoleLogger.warning("Note: Hooks.bungeecord is set to false but your server appears to be running in"
                 + " bungeecord mode (see your spigot.yml). In order to allow the datasource caching and the"
@@ -69,4 +72,8 @@ public class SettingsWarner {
             authMe.stopOrUnload();
         }
     }
+
+    private static boolean isTrue(Optional<Boolean> value) {
+        return value.isPresent() && value.get();
+    }
 }

src/main/java/fr/xephi/authme/util/Utils.java

@@ -1,7 +1,6 @@
 package fr.xephi.authme.util;
 
 import fr.xephi.authme.ConsoleLogger;
-import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.ConsoleCommandSender;
@@ -23,20 +22,6 @@ public final class Utils {
     private Utils() {
     }
 
-    /**
-     * Returns if the running server instance is craftbukkit or spigot based.
-     *
-     * @return true if the running server instance is spigot-based.
-     */
-    public static boolean isSpigot() {
-        try {
-            Bukkit.spigot();
-            return true;
-        } catch (NoSuchMethodError e) {
-            return false;
-        }
-    }
-
     /**
      * Compile Pattern sneaky without throwing Exception.
      *