Configuration refactoring, convert symbols.yml to custom-placeholders.yml

plugin/src/main/java/me/filoghost/holographicdisplays/HolographicDisplays.java

@@ -6,6 +6,7 @@
 package me.filoghost.holographicdisplays;
 
 import me.filoghost.fcommons.BaseJavaPlugin;
+import me.filoghost.fcommons.config.exception.ConfigException;
 import me.filoghost.fcommons.logging.Log;
 import me.filoghost.fcommons.reflection.ReflectUtils;
 import me.filoghost.holographicdisplays.api.internal.BackendAPI;
@@ -13,9 +14,9 @@ import me.filoghost.holographicdisplays.bridge.bungeecord.BungeeServerTracker;
 import me.filoghost.holographicdisplays.bridge.protocollib.ProtocolLibHook;
 import me.filoghost.holographicdisplays.bridge.protocollib.current.ProtocolLibHookImpl;
 import me.filoghost.holographicdisplays.commands.HologramCommandManager;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.disk.Configuration;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.upgrade.LegacySymbolsUpgrader;
-import me.filoghost.holographicdisplays.disk.UnicodeSymbols;
 import me.filoghost.holographicdisplays.listener.MainListener;
 import me.filoghost.holographicdisplays.nms.interfaces.NMSManager;
 import me.filoghost.holographicdisplays.object.DefaultBackendAPI;
@@ -71,12 +72,20 @@ public class HolographicDisplays extends BaseJavaPlugin {
         System.setProperty("HolographicDisplaysLoaded", "true");
         instance = this;
         dataFolderPath = getDataFolder().toPath();
+        ConfigManager configManager = new ConfigManager(dataFolderPath);
+
+        // Run only once at startup, before anything else.
+        try {
+            LegacySymbolsUpgrader.run(configManager);
+        } catch (ConfigException e) {
+            Log.warning("Couldn't convert symbols file", e);
+        }
 
         // Load placeholders.yml.
-        UnicodeSymbols.load(this);
+        configManager.reloadCustomPlaceholders();
 
         // Load the configuration.
-        Configuration.load(this);
+        configManager.reloadMainConfig();
         
         if (Configuration.updateNotification) {
             UpdateChecker.run(this, 75097, (String newVersion) -> {
@@ -119,7 +128,7 @@ public class HolographicDisplays extends BaseJavaPlugin {
         }
         
         // Initialize other static classes.
-        HologramDatabase.loadYamlFile(this);
+        configManager.reloadHologramDatabase();
         BungeeServerTracker.restartTask(Configuration.bungeeRefreshSeconds);
         
         // Start repeating tasks.
@@ -132,7 +141,7 @@ public class HolographicDisplays extends BaseJavaPlugin {
                 "This can be caused by edits to plugin.yml or other plugins.");
         }
         
-        commandManager = new HologramCommandManager();
+        commandManager = new HologramCommandManager(configManager);
         commandManager.register(this);
 
         mainListener = new MainListener(nmsManager);
@@ -143,7 +152,8 @@ public class HolographicDisplays extends BaseJavaPlugin {
         new MetricsLite(this, pluginID);
         
         // Holograms are loaded later, when the worlds are ready.
-        Bukkit.getScheduler().runTask(this, new StartupLoadHologramsTask());
+        Bukkit.getScheduler().runTask(this, 
+                new StartupLoadHologramsTask(configManager.getHologramDatabase().getHolograms()));
         
         // Enable the API.
         BackendAPI.setImplementation(new DefaultBackendAPI());

plugin/src/main/java/me/filoghost/holographicdisplays/bridge/bungeecord/BungeeServerTracker.java

@@ -17,7 +17,6 @@ import java.io.IOException;
 import java.net.SocketTimeoutException;
 import java.net.UnknownHostException;
 import java.util.Map;
-import java.util.Map.Entry;
 import java.util.concurrent.ConcurrentHashMap;
 
 public class BungeeServerTracker {
@@ -146,12 +145,12 @@ public class BungeeServerTracker {
             if (Configuration.pingerEnable) {
                 Bukkit.getScheduler().runTaskAsynchronously(HolographicDisplays.getInstance(), () -> {
                     
-                    for (Entry<String, ServerAddress> entry : Configuration.pingerServers.entrySet()) {
+                    for (ServerAddress serverAddress : Configuration.pingerServers) {
-                        BungeeServerInfo serverInfo = getOrCreateServerInfo(entry.getKey());
+                        BungeeServerInfo serverInfo = getOrCreateServerInfo(serverAddress.getName());
                         boolean displayOffline = false;
                         
                         try {
-                            PingResponse data = ServerPinger.fetchData(entry.getValue(), Configuration.pingerTimeout);
+                            PingResponse data = ServerPinger.fetchData(serverAddress, Configuration.pingerTimeout);
                             
                             if (data.isOnline()) {
                                 serverInfo.setOnline(true);
@@ -164,13 +163,13 @@ public class BungeeServerTracker {
                         } catch (SocketTimeoutException e) {
                             displayOffline = true;
                         } catch (UnknownHostException e) {
-                            Log.warning("Couldn't fetch data from " + entry.getKey() + "(" + entry.getValue().toString() + "): unknown host address.");
+                            Log.warning("Couldn't fetch data from " + serverAddress + ": unknown host address.");
                             displayOffline = true;
                         } catch (IOException e) {
                             displayOffline = true;
                         } catch (Throwable t) {
                             displayOffline = true;
-                            Log.warning("Couldn't fetch data from " + entry.getKey() + "(" + entry.getValue().toString() + ")", t);
+                            Log.warning("Couldn't fetch data from " + serverAddress, t);
                         }
                         
                         if (displayOffline) {

plugin/src/main/java/me/filoghost/holographicdisplays/commands/HologramCommandManager.java

@@ -31,6 +31,7 @@ import me.filoghost.holographicdisplays.commands.subs.RemovelineCommand;
 import me.filoghost.holographicdisplays.commands.subs.SetlineCommand;
 import me.filoghost.holographicdisplays.commands.subs.TeleportCommand;
 import me.filoghost.holographicdisplays.common.Utils;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import org.bukkit.Bukkit;
 import org.bukkit.command.CommandSender;
 
@@ -47,28 +48,28 @@ public class HologramCommandManager extends SubCommandManager {
     
     private final HelpCommand helpCommand;
 
-    public HologramCommandManager() {
+    public HologramCommandManager(ConfigManager configManager) {
         setName("holograms");
         subCommands = new ArrayList<>();
         subCommandsByClass = new HashMap<>();
         
-        registerSubCommand(new AddlineCommand());
+        registerSubCommand(new AddlineCommand(configManager));
-        registerSubCommand(new CreateCommand());
+        registerSubCommand(new CreateCommand(configManager));
-        registerSubCommand(new DeleteCommand());
+        registerSubCommand(new DeleteCommand(configManager));
         registerSubCommand(new EditCommand());
         registerSubCommand(new ListCommand());
         registerSubCommand(new NearCommand());
         registerSubCommand(new TeleportCommand());
-        registerSubCommand(new MovehereCommand());
+        registerSubCommand(new MovehereCommand(configManager));
-        registerSubCommand(new AlignCommand());
+        registerSubCommand(new AlignCommand(configManager));
-        registerSubCommand(new CopyCommand());
+        registerSubCommand(new CopyCommand(configManager));
-        registerSubCommand(new ReloadCommand());
+        registerSubCommand(new ReloadCommand(configManager));
         
-        registerSubCommand(new RemovelineCommand());
+        registerSubCommand(new RemovelineCommand(configManager));
-        registerSubCommand(new SetlineCommand());
+        registerSubCommand(new SetlineCommand(configManager));
-        registerSubCommand(new InsertlineCommand());
+        registerSubCommand(new InsertlineCommand(configManager));
-        registerSubCommand(new ReadtextCommand());
+        registerSubCommand(new ReadtextCommand(configManager));
-        registerSubCommand(new ReadimageCommand());
+        registerSubCommand(new ReadimageCommand(configManager));
         registerSubCommand(new InfoCommand());
         
         registerSubCommand(new DebugCommand());

plugin/src/main/java/me/filoghost/holographicdisplays/commands/HologramCommandValidate.java

@@ -10,7 +10,7 @@ import me.filoghost.fcommons.command.validation.CommandValidate;
 import me.filoghost.holographicdisplays.HolographicDisplays;
 import me.filoghost.holographicdisplays.common.Utils;
 import me.filoghost.holographicdisplays.disk.HologramLineParser;
-import me.filoghost.holographicdisplays.disk.HologramLineParseException;
+import me.filoghost.holographicdisplays.disk.HologramLoadException;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import me.filoghost.holographicdisplays.object.NamedHologramManager;
 import me.filoghost.holographicdisplays.object.line.CraftHologramLine;
@@ -24,7 +24,7 @@ public class HologramCommandValidate {
     public static CraftHologramLine parseHologramLine(NamedHologram hologram, String serializedLine, boolean validateMaterial) throws CommandException {
         try {
             return HologramLineParser.parseLine(hologram, serializedLine, validateMaterial);
-        } catch (HologramLineParseException e) {
+        } catch (HologramLoadException e) {
             throw new CommandException(Utils.formatExceptionMessage(e));
         }
     }

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/AddlineCommand.java

@@ -10,7 +10,7 @@ import me.filoghost.fcommons.command.validation.CommandException;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.common.Utils;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.event.NamedHologramEditedEvent;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import me.filoghost.holographicdisplays.object.line.CraftHologramLine;
@@ -19,11 +19,15 @@ import org.bukkit.command.CommandSender;
 
 public class AddlineCommand extends LineEditingCommand {
 
-    public AddlineCommand() {
+    private final ConfigManager configManager;
+
+    public AddlineCommand(ConfigManager configManager) {
         super("addline");
         setMinArgs(2);
         setUsageArgs("<hologram> <text>");
         setDescription("Adds a line to an existing hologram.");
+        
+        this.configManager = configManager;
     }
 
     @Override
@@ -35,8 +39,8 @@ public class AddlineCommand extends LineEditingCommand {
         hologram.getLinesUnsafe().add(line);
         hologram.refreshAll();
 
-        HologramDatabase.saveHologram(hologram);
+        configManager.getHologramDatabase().addOrUpdate(hologram);
-        HologramDatabase.trySaveToDisk();
+        configManager.saveHologramDatabase();
         Bukkit.getPluginManager().callEvent(new NamedHologramEditedEvent(hologram));
         
         sender.sendMessage(Colors.PRIMARY + "Line added!");

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/AlignCommand.java

@@ -11,18 +11,22 @@ import me.filoghost.fcommons.command.validation.CommandValidate;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import org.bukkit.Location;
 import org.bukkit.command.CommandSender;
 
 public class AlignCommand extends HologramSubCommand {
 
-    public AlignCommand() {
+    private final ConfigManager configManager;
+
+    public AlignCommand(ConfigManager configManager) {
         super("align");
         setMinArgs(3);
         setUsageArgs("<X | Y | Z | XZ> <hologram> <referenceHologram>");
         setDescription("Aligns the first hologram to the second, in the specified axis.");
+        
+        this.configManager = configManager;
     }
 
     @Override
@@ -52,8 +56,8 @@ public class AlignCommand extends HologramSubCommand {
         hologram.despawnEntities();
         hologram.refreshAll();
             
-        HologramDatabase.saveHologram(hologram);
+        configManager.getHologramDatabase().addOrUpdate(hologram);
-        HologramDatabase.trySaveToDisk();
+        configManager.saveHologramDatabase();
         sender.sendMessage(Colors.PRIMARY + "Hologram \"" + hologram.getName() + "\" aligned to the hologram \"" + referenceHologram.getName() + "\" on the " + axis.toUpperCase() + " axis.");
     }
     

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/CopyCommand.java

@@ -10,18 +10,22 @@ import me.filoghost.fcommons.command.validation.CommandException;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import me.filoghost.holographicdisplays.object.line.CraftHologramLine;
 import org.bukkit.command.CommandSender;
 
 public class CopyCommand extends HologramSubCommand {
 
-    public CopyCommand() {
+    private final ConfigManager configManager;
+    
+    public CopyCommand(ConfigManager configManager) {
         super("copy");
         setMinArgs(2);
         setUsageArgs("<fromHologram> <toHologram>");
         setDescription("Copies the contents of a hologram into another one.");
+        
+        this.configManager = configManager;
     }
     
     @Override
@@ -31,14 +35,14 @@ public class CopyCommand extends HologramSubCommand {
         
         toHologram.clearLines();
         for (CraftHologramLine line : fromHologram.getLinesUnsafe()) {
-            CraftHologramLine clonedLine = HologramCommandValidate.parseHologramLine(toHologram, HologramDatabase.serializeHologramLine(line), false);
+            CraftHologramLine clonedLine = HologramCommandValidate.parseHologramLine(toHologram, line.getSerializedConfigValue(), false);
             toHologram.getLinesUnsafe().add(clonedLine);
         }
         
         toHologram.refreshAll();
 
-        HologramDatabase.saveHologram(toHologram);
+        configManager.getHologramDatabase().addOrUpdate(toHologram);
-        HologramDatabase.trySaveToDisk();
+        configManager.saveHologramDatabase();
         
         sender.sendMessage(Colors.PRIMARY + "Hologram \"" + fromHologram.getName() + "\" copied into hologram \"" + toHologram.getName() + "\"!");
     }

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/CreateCommand.java

@@ -12,7 +12,7 @@ import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
 import me.filoghost.holographicdisplays.common.Utils;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import me.filoghost.holographicdisplays.object.NamedHologramManager;
 import me.filoghost.holographicdisplays.object.line.CraftHologramLine;
@@ -23,7 +23,9 @@ import org.bukkit.event.player.PlayerTeleportEvent.TeleportCause;
 
 public class CreateCommand extends HologramSubCommand {
 
-    public CreateCommand() {
+    private final ConfigManager configManager;
+    
+    public CreateCommand(ConfigManager configManager) {
         super("create");
         setMinArgs(1);
         setUsageArgs("<hologramName> [text]");
@@ -31,6 +33,8 @@ public class CreateCommand extends HologramSubCommand {
                 "Creates a new hologram with the given name, that must",
                 "be alphanumeric. The name will be used as reference to",
                 "that hologram for editing commands.");
+        
+        this.configManager = configManager;
     }
 
     @SuppressWarnings("deprecation")
@@ -68,8 +72,8 @@ public class CreateCommand extends HologramSubCommand {
         NamedHologramManager.addHologram(hologram);
         hologram.refreshAll();
 
-        HologramDatabase.saveHologram(hologram);
+        configManager.getHologramDatabase().addOrUpdate(hologram);
-        HologramDatabase.trySaveToDisk();
+        configManager.saveHologramDatabase();
         Location look = player.getLocation();
         look.setPitch(90);
         player.teleport(look, TeleportCause.PLUGIN);

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/DeleteCommand.java

@@ -10,18 +10,22 @@ import me.filoghost.fcommons.command.validation.CommandException;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import me.filoghost.holographicdisplays.object.NamedHologramManager;
 import org.bukkit.command.CommandSender;
 
 public class DeleteCommand extends HologramSubCommand {
 
-    public DeleteCommand() {
+    private final ConfigManager configManager;
+
+    public DeleteCommand(ConfigManager configManager) {
         super("delete", "remove");
         setMinArgs(1);
         setUsageArgs("<hologram>");
         setDescription("Deletes a hologram. Cannot be undone.");
+        
+        this.configManager = configManager;
     }
 
     @Override
@@ -30,9 +34,10 @@ public class DeleteCommand extends HologramSubCommand {
         
         hologram.delete();
         NamedHologramManager.removeHologram(hologram);
-        HologramDatabase.deleteHologram(hologram.getName());
 
-        HologramDatabase.trySaveToDisk();
+        configManager.getHologramDatabase().removeHologram(hologram);
+        configManager.saveHologramDatabase();
+        
         sender.sendMessage(Colors.PRIMARY + "You deleted the hologram '" + hologram.getName() + "'.");
     }
 

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/InfoCommand.java

@@ -10,7 +10,6 @@ import me.filoghost.fcommons.command.validation.CommandException;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.Messages;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import me.filoghost.holographicdisplays.object.line.CraftHologramLine;
 import org.bukkit.command.CommandSender;
@@ -33,7 +32,7 @@ public class InfoCommand extends LineEditingCommand {
         int index = 0;
         
         for (CraftHologramLine line : hologram.getLinesUnsafe()) {
-            sender.sendMessage(Colors.SECONDARY + Colors.BOLD + (++index) + Colors.SECONDARY_SHADOW + ". " + Colors.SECONDARY + HologramDatabase.serializeHologramLine(line));
+            sender.sendMessage(Colors.SECONDARY + Colors.BOLD + (++index) + Colors.SECONDARY_SHADOW + ". " + Colors.SECONDARY + line.getSerializedConfigValue());
         }
         EditCommand.sendQuickEditCommands(context, hologram);
     }

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/InsertlineCommand.java

@@ -12,7 +12,7 @@ import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.Messages;
 import me.filoghost.holographicdisplays.common.Utils;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.event.NamedHologramEditedEvent;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import me.filoghost.holographicdisplays.object.line.CraftHologramLine;
@@ -21,7 +21,9 @@ import org.bukkit.command.CommandSender;
 
 public class InsertlineCommand extends LineEditingCommand {
 
-    public InsertlineCommand() {
+    private final ConfigManager configManager;
+    
+    public InsertlineCommand(ConfigManager configManager) {
         super("insertline");
         setMinArgs(3);
         setUsageArgs("<hologram> <lineNumber> <text>");
@@ -29,6 +31,8 @@ public class InsertlineCommand extends LineEditingCommand {
                 "Inserts a line after the specified index.",
                 "If the index is 0, the line will be put before",
                 "the first line of the hologram.");
+        
+        this.configManager = configManager;
     }
 
     @Override
@@ -45,8 +49,8 @@ public class InsertlineCommand extends LineEditingCommand {
         hologram.getLinesUnsafe().add(insertAfter, line);
         hologram.refreshAll();
             
-        HologramDatabase.saveHologram(hologram);
+        configManager.getHologramDatabase().addOrUpdate(hologram);
-        HologramDatabase.trySaveToDisk();
+        configManager.saveHologramDatabase();
         
         Bukkit.getPluginManager().callEvent(new NamedHologramEditedEvent(hologram));
         

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/MovehereCommand.java

@@ -11,7 +11,7 @@ import me.filoghost.fcommons.command.validation.CommandValidate;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import org.bukkit.Location;
 import org.bukkit.command.CommandSender;
@@ -20,12 +20,15 @@ import org.bukkit.event.player.PlayerTeleportEvent.TeleportCause;
 
 public class MovehereCommand extends HologramSubCommand {
 
+    private final ConfigManager configManager;
 
-    public MovehereCommand() {
+    public MovehereCommand(ConfigManager configManager) {
         super("movehere");
         setMinArgs(1);
         setUsageArgs("<hologram>");
         setDescription("Moves a hologram to your location.");
+        
+        this.configManager = configManager;
     }
 
     @Override
@@ -37,8 +40,8 @@ public class MovehereCommand extends HologramSubCommand {
         hologram.despawnEntities();
         hologram.refreshAll();
         
-        HologramDatabase.saveHologram(hologram);
+        configManager.getHologramDatabase().addOrUpdate(hologram);
-        HologramDatabase.trySaveToDisk();
+        configManager.saveHologramDatabase();
         Location to = player.getLocation();
         to.setPitch(90);
         player.teleport(to, TeleportCause.PLUGIN);

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/ReadimageCommand.java

@@ -12,12 +12,12 @@ import me.filoghost.fcommons.command.validation.CommandValidate;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.Messages;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.event.NamedHologramEditedEvent;
+import me.filoghost.holographicdisplays.image.ImageMessage;
+import me.filoghost.holographicdisplays.image.ImageReadException;
 import me.filoghost.holographicdisplays.image.ImageReader;
 import me.filoghost.holographicdisplays.image.ImageTooWideException;
-import me.filoghost.holographicdisplays.image.ImageReadException;
-import me.filoghost.holographicdisplays.image.ImageMessage;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import me.filoghost.holographicdisplays.object.line.CraftTextLine;
 import org.bukkit.Bukkit;
@@ -35,10 +35,14 @@ import java.util.List;
 
 public class ReadimageCommand extends LineEditingCommand {
 
-    public ReadimageCommand() {
+    private final ConfigManager configManager;
+    
+    public ReadimageCommand(ConfigManager configManager) {
         super("readimage", "image");
         setMinArgs(3);
         setUsageArgs("<hologram> <imageWithExtension> <width>");
+        
+        this.configManager = configManager;
     }
 
     @Override
@@ -120,8 +124,8 @@ public class ReadimageCommand extends LineEditingCommand {
                 Messages.sendTip(sender, "The image has a very low height. You can increase it by increasing the width, it will scale automatically.");
             }
             
-            HologramDatabase.saveHologram(hologram);
+            configManager.getHologramDatabase().addOrUpdate(hologram);
-            HologramDatabase.trySaveToDisk();
+            configManager.saveHologramDatabase();
             
             if (append) {
                 sender.sendMessage(Colors.PRIMARY + "The image was appended int the end of the hologram!");

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/ReadtextCommand.java

@@ -11,9 +11,9 @@ import me.filoghost.fcommons.command.validation.CommandException;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.commands.Messages;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
-import me.filoghost.holographicdisplays.disk.HologramLineParseException;
 import me.filoghost.holographicdisplays.disk.HologramLineParser;
+import me.filoghost.holographicdisplays.disk.HologramLoadException;
 import me.filoghost.holographicdisplays.event.NamedHologramEditedEvent;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import me.filoghost.holographicdisplays.object.line.CraftHologramLine;
@@ -31,10 +31,14 @@ import java.util.List;
 
 public class ReadtextCommand extends LineEditingCommand {
 
-    public ReadtextCommand() {
+    private final ConfigManager configManager;
+    
+    public ReadtextCommand(ConfigManager configManager) {
         super("readtext", "readlines");
         setMinArgs(2);
         setUsageArgs("<hologram> <fileWithExtension>");
+        
+        this.configManager = configManager;
     }
 
     @Override
@@ -71,7 +75,7 @@ public class ReadtextCommand extends LineEditingCommand {
                 try {
                     CraftHologramLine line = HologramLineParser.parseLine(hologram, serializedLines.get(i), true);
                     linesToAdd.add(line);
-                } catch (HologramLineParseException e) {
+                } catch (HologramLoadException e) {
                     throw new CommandException("Error at line " + (i + 1) + ": " + e.getMessage());
                 }
             }
@@ -80,8 +84,8 @@ public class ReadtextCommand extends LineEditingCommand {
             hologram.getLinesUnsafe().addAll(linesToAdd);
             hologram.refreshAll();
 
-            HologramDatabase.saveHologram(hologram);
+            configManager.getHologramDatabase().addOrUpdate(hologram);
-            HologramDatabase.trySaveToDisk();
+            configManager.saveHologramDatabase();
             
             if (isImageExtension(FileUtils.getExtension(fileName))) {
                 Messages.sendWarning(sender, "The read file has an image's extension. If it is an image, you should use /" + context.getRootLabel() + " readimage.");

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/ReloadCommand.java

@@ -13,10 +13,10 @@ import me.filoghost.holographicdisplays.bridge.bungeecord.BungeeServerTracker;
 import me.filoghost.holographicdisplays.commands.HologramSubCommand;
 import me.filoghost.holographicdisplays.commands.Messages;
 import me.filoghost.holographicdisplays.common.Utils;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.disk.Configuration;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.HologramConfig;
 import me.filoghost.holographicdisplays.disk.HologramLoadException;
-import me.filoghost.holographicdisplays.disk.UnicodeSymbols;
 import me.filoghost.holographicdisplays.event.HolographicDisplaysReloadEvent;
 import me.filoghost.holographicdisplays.object.CraftHologram;
 import me.filoghost.holographicdisplays.object.NamedHologram;
@@ -26,26 +26,28 @@ import me.filoghost.holographicdisplays.placeholder.PlaceholdersManager;
 import org.bukkit.Bukkit;
 import org.bukkit.command.CommandSender;
 
-import java.util.Set;
-
 public class ReloadCommand extends HologramSubCommand {
 
-    public ReloadCommand() {
+    private final ConfigManager configManager;
+
+    public ReloadCommand(ConfigManager configManager) {
         super("reload");
         setDescription("Reloads the holograms from the database.");
+        
+        this.configManager = configManager;
     }
     
     @Override
     public void execute(CommandSender sender, String[] args, SubCommandContext context) {            
         long startMillis = System.currentTimeMillis();
 
-        UnicodeSymbols.load(HolographicDisplays.getInstance());
+        configManager.reloadCustomPlaceholders();
-        Configuration.load(HolographicDisplays.getInstance());
+        configManager.reloadMainConfig();
         
         BungeeServerTracker.resetTrackedServers();
         BungeeServerTracker.restartTask(Configuration.bungeeRefreshSeconds);
         
-        HologramDatabase.loadYamlFile(HolographicDisplays.getInstance());
+        configManager.reloadHologramDatabase();
         try {
             AnimationsRegister.loadAnimations(HolographicDisplays.getInstance());
         } catch (Exception e) {
@@ -55,17 +57,14 @@ public class ReloadCommand extends HologramSubCommand {
         PlaceholdersManager.untrackAll();
         NamedHologramManager.clearAll();
         
-        Set<String> savedHolograms = HologramDatabase.getHolograms();
+        for (HologramConfig hologramConfig :  configManager.getHologramDatabase().getHolograms()) {
-        if (savedHolograms != null && savedHolograms.size() > 0) {
-            for (String singleSavedHologram : savedHolograms) {
             try {
-                    NamedHologram singleHologramEntity = HologramDatabase.loadHologram(singleSavedHologram);
+                NamedHologram hologram = hologramConfig.createHologram();
-                    NamedHologramManager.addHologram(singleHologramEntity);
+                NamedHologramManager.addHologram(hologram);
             } catch (HologramLoadException e) {
                 Messages.sendWarning(sender, Utils.formatExceptionMessage(e));
             }
         }
-        }
         
         for (CraftHologram hologram : NamedHologramManager.getHolograms()) {
             hologram.refreshAll();

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/RemovelineCommand.java

@@ -10,7 +10,7 @@ import me.filoghost.fcommons.command.validation.CommandException;
 import me.filoghost.fcommons.command.validation.CommandValidate;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.event.NamedHologramEditedEvent;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import org.bukkit.Bukkit;
@@ -18,11 +18,15 @@ import org.bukkit.command.CommandSender;
 
 public class RemovelineCommand extends LineEditingCommand {
 
-    public RemovelineCommand() {
+    private final ConfigManager configManager;
+
+    public RemovelineCommand(ConfigManager configManager) {
         super("removeline");
         setMinArgs(2);
         setUsageArgs("<hologram> <lineNumber>");
         setDescription("Removes a line from a hologram.");
+        
+        this.configManager = configManager;
     }
 
     @Override
@@ -39,8 +43,8 @@ public class RemovelineCommand extends LineEditingCommand {
         hologram.removeLine(index);
         hologram.refreshAll();
         
-        HologramDatabase.saveHologram(hologram);
+        configManager.getHologramDatabase().addOrUpdate(hologram);
-        HologramDatabase.trySaveToDisk();
+        configManager.saveHologramDatabase();
         Bukkit.getPluginManager().callEvent(new NamedHologramEditedEvent(hologram));
         
         sender.sendMessage(Colors.PRIMARY + "Line " + lineNumber + " removed!");

plugin/src/main/java/me/filoghost/holographicdisplays/commands/subs/SetlineCommand.java

@@ -11,7 +11,7 @@ import me.filoghost.fcommons.command.validation.CommandValidate;
 import me.filoghost.holographicdisplays.Colors;
 import me.filoghost.holographicdisplays.commands.HologramCommandValidate;
 import me.filoghost.holographicdisplays.common.Utils;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
 import me.filoghost.holographicdisplays.event.NamedHologramEditedEvent;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import me.filoghost.holographicdisplays.object.line.CraftHologramLine;
@@ -20,11 +20,15 @@ import org.bukkit.command.CommandSender;
 
 public class SetlineCommand extends LineEditingCommand {
 
-    public SetlineCommand() {
+    private final ConfigManager configManager;
+
+    public SetlineCommand(ConfigManager configManager) {
         super("setline");
         setMinArgs(3);
         setUsageArgs("<hologram> <lineNumber> <newText>");
         setDescription("Changes a line of a hologram.");
+        
+        this.configManager = configManager;
     }
 
     @Override
@@ -42,8 +46,8 @@ public class SetlineCommand extends LineEditingCommand {
         hologram.getLinesUnsafe().set(index, line);
         hologram.refreshAll();
 
-        HologramDatabase.saveHologram(hologram);
+        configManager.getHologramDatabase().addOrUpdate(hologram);
-        HologramDatabase.trySaveToDisk();
+        configManager.saveHologramDatabase();
         Bukkit.getPluginManager().callEvent(new NamedHologramEditedEvent(hologram));
         
         sender.sendMessage(Colors.PRIMARY + "Line " + lineNumber + " changed!");

plugin/src/main/java/me/filoghost/holographicdisplays/disk/ConfigManager.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.disk;
+
+import me.filoghost.fcommons.config.BaseConfigManager;
+import me.filoghost.fcommons.config.Config;
+import me.filoghost.fcommons.config.ConfigErrors;
+import me.filoghost.fcommons.config.ConfigLoader;
+import me.filoghost.fcommons.config.FileConfig;
+import me.filoghost.fcommons.config.exception.ConfigException;
+import me.filoghost.fcommons.config.mapped.MappedConfigLoader;
+import me.filoghost.fcommons.logging.Log;
+
+import java.nio.file.Path;
+
+public class ConfigManager extends BaseConfigManager {
+
+    private final MappedConfigLoader<MainConfigModel> mainConfigLoader;
+    private final ConfigLoader databaseConfigLoader;
+    private final ConfigLoader placeholdersConfigLoader;
+    private final HologramDatabase hologramDatabase;
+
+    public ConfigManager(Path rootDataFolder) {
+        super(rootDataFolder);
+        this.mainConfigLoader = getMappedConfigLoader("config.yml", MainConfigModel.class);
+        this.databaseConfigLoader = getConfigLoader("database.yml");
+        this.placeholdersConfigLoader = getConfigLoader("custom-placeholders.yml");
+        this.hologramDatabase = new HologramDatabase();
+    }
+
+    public void reloadMainConfig() {
+        MainConfigModel mainConfig;
+
+        try {
+            mainConfig = mainConfigLoader.init();
+        } catch (ConfigException e) {
+            logConfigInitException(mainConfigLoader.getFile(), e);
+            mainConfig = new MainConfigModel(); // Fallback: use default values
+        }
+        
+        Configuration.load(mainConfig);
+    }
+
+    public void reloadHologramDatabase() {
+        Config databaseConfig;
+
+        try {
+            databaseConfig = databaseConfigLoader.init();
+        } catch (ConfigException e) {
+            logConfigInitException(databaseConfigLoader.getFile(), e);
+            databaseConfig = new Config(); // Fallback: empty config
+        }
+        
+        hologramDatabase.reloadFromConfig(databaseConfig);
+    }
+
+    public void saveHologramDatabase() {
+        try {
+            databaseConfigLoader.save(hologramDatabase.saveToConfig());
+        } catch (ConfigException e) {
+            logConfigSaveException(databaseConfigLoader.getFile(), e);
+        }
+    }
+
+    public HologramDatabase getHologramDatabase() {
+        return hologramDatabase;
+    }
+
+    public void reloadCustomPlaceholders() {
+        FileConfig placeholdersConfig;
+        
+        try {
+            placeholdersConfig = placeholdersConfigLoader.init();
+        } catch (ConfigException e) {
+            logConfigInitException(placeholdersConfigLoader.getFile(), e);
+            placeholdersConfig = new FileConfig(placeholdersConfigLoader.getFile()); // Fallback: empty config
+        }
+        
+        CustomPlaceholders.load(placeholdersConfig);
+    }
+
+    private void logConfigInitException(Path file, ConfigException e) {
+        Log.severe("error while initializing config file \"" + formatPath(file) + "\"", e);
+    }
+
+    private void logConfigSaveException(Path file, ConfigException e) {
+        Log.severe("error while saving config file \"" + formatPath(file) + "\"", e);
+    }
+
+    private String formatPath(Path path) {
+       return ConfigErrors.formatPath(getRootDataFolder(), path);
+    }
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/disk/ConfigNode.java

@@ -1,47 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.disk;
-
-import java.util.Arrays;
-
-public enum ConfigNode {
-
-    SPACE_BETWEEN_LINES("space-between-lines", 0.02),
-    QUICK_EDIT_COMMANDS("quick-edit-commands", true),
-    IMAGES_SYMBOL("images.symbol", "[x]"),
-    TRANSPARENCY_SPACE("images.transparency.space", " [|] "),
-    TRANSPARENCY_COLOR("images.transparency.color", "&7"),
-    UPDATE_NOTIFICATION("update-notification", true),
-    BUNGEE_REFRESH_SECONDS("bungee.refresh-seconds", 3),
-    BUNGEE_USE_REDIS_BUNGEE("bungee.use-RedisBungee", false),
-    BUNGEE_USE_FULL_PINGER("bungee.pinger.enable", false),
-    BUNGEE_PINGER_TIMEOUT("bungee.pinger.timeout", 500),
-    BUNGEE_PINGER_OFFLINE_MOTD("bungee.pinger.offline-motd", "&cOffline, couldn't get the MOTD."),
-    BUNGEE_PINGER_ONLINE_FORMAT("bungee.pinger.status.online", "&aOnline"),
-    BUNGEE_PINGER_OFFLINE_FORMAT("bungee.pinger.status.offline", "&cOffline"),
-    BUNGEE_PINGER_TRIM_MOTD("bungee.pinger.motd-remove-leading-trailing-spaces", true),
-    BUNGEE_PINGER_SERVERS("bungee.pinger.servers", Arrays.asList("hub: 127.0.0.1:25565", "survival: 127.0.0.1:25566", "minigames: 127.0.0.1:25567")),
-    TIME_FORMAT("time.format", "H:mm"),
-    TIME_ZONE("time.zone", "GMT+1"),
-    DEBUG("debug", false);
-    
-    private final String path;
-    private final Object value;
-    
-    ConfigNode(String path, Object defaultValue) {
-        this.path = path;
-        value = defaultValue;
-    }
-    
-    public String getPath() {
-        return path;
-    }
-    
-    public Object getDefaultValue() {
-        return value;
-    }
-    
-}

plugin/src/main/java/me/filoghost/holographicdisplays/disk/Configuration.java

@@ -11,213 +11,154 @@
  */
 package me.filoghost.holographicdisplays.disk;
 
+import me.filoghost.fcommons.Strings;
 import me.filoghost.fcommons.logging.Log;
 import me.filoghost.holographicdisplays.common.DebugLogger;
 import org.bukkit.ChatColor;
-import org.bukkit.configuration.InvalidConfigurationException;
-import org.bukkit.configuration.file.YamlConfiguration;
-import org.bukkit.plugin.Plugin;
 
-import java.io.File;
-import java.io.IOException;
 import java.time.DateTimeException;
 import java.time.ZoneId;
 import java.time.format.DateTimeFormatter;
-import java.util.Arrays;
+import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 
-/**
- * Just a bunch of static variables to hold the settings.
- * Useful for fast access.
- */
 public class Configuration {
     
     public static double spaceBetweenLines;
     public static boolean quickEditCommands;
+    public static DateTimeFormatter timeFormat;
+    public static boolean updateNotification;
+
     public static String imageSymbol;
     public static String transparencySymbol;
-    public static boolean updateNotification;
     public static ChatColor transparencyColor;
 
-    public static DateTimeFormatter timeFormat;
-    
     public static int bungeeRefreshSeconds;
     public static boolean useRedisBungee;
-    
     public static boolean pingerEnable;
     public static int pingerTimeout;
     public static String pingerOfflineMotd;
     public static String pingerStatusOnline;
     public static String pingerStatusOffline;
     public static boolean pingerTrimMotd;
-    public static Map<String, ServerAddress> pingerServers;
+    public static List<ServerAddress> pingerServers;
     
+    public static void load(MainConfigModel config) {
+        spaceBetweenLines = config.spaceBetweenLines;
+        quickEditCommands = config.quickEditCommands;
+        timeFormat = parseTimeFormatter(config.timeFormat, config.timeZone);        
+        updateNotification = config.updateNotification;
         
-    public static void load(Plugin plugin) {
+        imageSymbol = StringConverter.toReadableFormat(config.imageSymbol);
-        File configFile = new File(plugin.getDataFolder(), "config.yml");
+        transparencySymbol = StringConverter.toReadableFormat(config.transparencySymbol);
-        if (!configFile.exists()) {
+        transparencyColor = parseTransparencyColor(config.transparencyColor);
-            plugin.getDataFolder().mkdirs();
-            plugin.saveResource("config.yml", true);
-        }
         
-        YamlConfiguration config = new YamlConfiguration();
+        bungeeRefreshSeconds = parseBungeeRefreshInterval(config.bungeeRefreshSeconds);
-        try {
+        useRedisBungee = config.useRedisBungee;
-            config.load(configFile);
+        pingerEnable = config.pingerEnable;
-        } catch (InvalidConfigurationException e) {
+        pingerTimeout = parsePingerTimeout(config.pingerTimeout);
-            e.printStackTrace();
+        pingerOfflineMotd = StringConverter.toReadableFormat(config.pingerOfflineMotd);
-            Log.warning("The configuration is not a valid YAML file! Please check it with a tool like http://yaml-online-parser.appspot.com/");
+        pingerStatusOnline = StringConverter.toReadableFormat(config.pingerStatusOnline);
-            return;
+        pingerStatusOffline = StringConverter.toReadableFormat(config.pingerStatusOffline);
-        } catch (IOException e) {
+        pingerTrimMotd = config.pingerTrimMotd;
-            e.printStackTrace();
-            Log.warning("I/O error while reading the configuration. Was the file in use?");
-            return;
-        } catch (Exception e) {
-            e.printStackTrace();
-            Log.warning("Unhandled exception while reading the configuration!");
-            return;
-        }
-        
-        boolean needsSave = false;
-        
-        for (ConfigNode node : ConfigNode.values()) {
-            if (!config.isSet(node.getPath())) {
-                needsSave = true;
-                config.set(node.getPath(), node.getDefaultValue());
-            }
-        }
-        
-        // Check the old values.
-        List<String> nodesToRemove = Arrays.asList(
-                "vertical-spacing",
-                "time-format",
-                "bungee-refresh-seconds",
-                "using-RedisBungee",
-                "bungee-online-format",
-                "bungee-offline-format",
-                "precise-hologram-movement"
-                );
-
-        for (String oldNode : nodesToRemove) {
-            if (config.isSet(oldNode)) {
-                config.set(oldNode, null);
-                needsSave = true;
-            }
-        }
-        
-        
-        
-        if (needsSave) {
-            config.options().header(String.join("\n",
-                    ".",
-                    ".  Read the tutorial at: http://dev.bukkit.org/bukkit-plugins/holographic-displays/",
-                    ".",
-                    ".  Plugin created by filoghost.",
-                    "."));
-            config.options().copyHeader(true);
-            try {
-                config.save(configFile);
-            } catch (IOException e) {
-                e.printStackTrace();
-                Log.warning("I/O error while saving the configuration. Was the file in use?");
-            }
-        }
-        
-        spaceBetweenLines = config.getDouble(ConfigNode.SPACE_BETWEEN_LINES.getPath());
-        quickEditCommands = config.getBoolean(ConfigNode.QUICK_EDIT_COMMANDS.getPath());
-        
-        updateNotification = config.getBoolean(ConfigNode.UPDATE_NOTIFICATION.getPath());
-        
-        imageSymbol = StringConverter.toReadableFormat(config.getString(ConfigNode.IMAGES_SYMBOL.getPath()));
-        transparencySymbol = StringConverter.toReadableFormat(config.getString(ConfigNode.TRANSPARENCY_SPACE.getPath()));
-        bungeeRefreshSeconds = config.getInt(ConfigNode.BUNGEE_REFRESH_SECONDS.getPath());
-        useRedisBungee = config.getBoolean(ConfigNode.BUNGEE_USE_REDIS_BUNGEE.getPath());
-        
-        pingerEnable = config.getBoolean(ConfigNode.BUNGEE_USE_FULL_PINGER.getPath());
-        pingerTimeout = config.getInt(ConfigNode.BUNGEE_PINGER_TIMEOUT.getPath());
-        pingerTrimMotd = config.getBoolean(ConfigNode.BUNGEE_PINGER_TRIM_MOTD.getPath());
-        
-        pingerOfflineMotd = StringConverter.toReadableFormat(config.getString(ConfigNode.BUNGEE_PINGER_OFFLINE_MOTD.getPath()));
-        pingerStatusOnline = StringConverter.toReadableFormat(config.getString(ConfigNode.BUNGEE_PINGER_ONLINE_FORMAT.getPath()));
-        pingerStatusOffline = StringConverter.toReadableFormat(config.getString(ConfigNode.BUNGEE_PINGER_OFFLINE_FORMAT.getPath()));
-        
-        if (pingerTimeout <= 0) {
-            pingerTimeout = 100;
-        } else if (pingerTimeout >= 10000) {
-            pingerTimeout = 10000;
-        }
-        
-        pingerServers = new HashMap<>();
         
+        pingerServers = new ArrayList<>();
         if (pingerEnable) {
-            for (String singleServer : config.getStringList(ConfigNode.BUNGEE_PINGER_SERVERS.getPath())) {
+            for (String singleServer : config.pingerServers) {
-                String[] nameAndAddress = singleServer.split(":", 2);
+                ServerAddress serverAddress = parseServerAddress(singleServer);
-                if (nameAndAddress.length < 2) {
+                if (serverAddress != null) {
-                    Log.warning("The server info \"" + singleServer + "\" is not valid. There should be a name and an address, separated by a colon.");
+                    pingerServers.add(serverAddress);
-                    continue;
                 }
-                
-                String name = nameAndAddress[0].trim();
-                String address = nameAndAddress[1].replace(" ", "");
-                
-                String ip;
-                int port;
-                
-                if (address.contains(":")) {
-                    String[] ipAndPort = address.split(":", 2);
-                    ip = ipAndPort[0];
-                    try {
-                        port = Integer.parseInt(ipAndPort[1]);
-                    } catch (NumberFormatException e) {
-                        Log.warning("Invalid port number in the server info \"" + singleServer + "\".");
-                        continue;
-                    }
-                } else {
-                    ip = address;
-                    port = 25565; // The default Minecraft port.
-                }
-                
-                pingerServers.put(name, new ServerAddress(ip, port));
             }
         }
 
-        DebugLogger.setDebugEnabled(config.getBoolean(ConfigNode.DEBUG.getPath()));
+        DebugLogger.setDebugEnabled(config.debug);
+    }
 
-        String tempColor = config.getString(ConfigNode.TRANSPARENCY_COLOR.getPath()).replace('&', ChatColor.COLOR_CHAR);
+    private static DateTimeFormatter parseTimeFormatter(String pattern, String timeZone) {
-        boolean foundColor = false;
+        DateTimeFormatter timeFormat;
-        for (ChatColor chatColor : ChatColor.values()) {
-            if (chatColor.toString().equals(tempColor)) {
-                Configuration.transparencyColor = chatColor;
-                foundColor = true;
-            }
-        }
-        if (!foundColor) {
-            Configuration.transparencyColor = ChatColor.GRAY;
-            Log.warning("You didn't set a valid chat color for transparency in the configuration, light gray (&7) will be used.");
-        }
 
         try {
-            timeFormat = DateTimeFormatter.ofPattern(config.getString(ConfigNode.TIME_FORMAT.getPath()));
+            timeFormat = DateTimeFormatter.ofPattern(pattern);
         } catch (IllegalArgumentException ex) {
             timeFormat = DateTimeFormatter.ofPattern("H:mm");
             Log.warning("Time format not valid in the configuration, using the default.");
         }
 
         try {
-            timeFormat = timeFormat.withZone(ZoneId.of(config.getString(ConfigNode.TIME_ZONE.getPath())));
+            timeFormat = timeFormat.withZone(ZoneId.of(timeZone));
         } catch (DateTimeException e) {
             Log.warning("Time zone not valid in the configuration, using the default.");
         }
 
-        if (bungeeRefreshSeconds < 1) {
+        return timeFormat;
-            Log.warning("The minimum interval for pinging BungeeCord's servers is 1 second. It has been automatically set.");
-            bungeeRefreshSeconds = 1;
     }
 
-        if (bungeeRefreshSeconds > 60) {
+    private static ChatColor parseTransparencyColor(String transparencyColor) {
+        transparencyColor = transparencyColor.replace('&', ChatColor.COLOR_CHAR);
+
+        for (ChatColor chatColor : ChatColor.values()) {
+            if (chatColor.toString().equals(transparencyColor)) {
+                return chatColor;
+            }
+        }
+
+        Log.warning("You didn't set a valid chat color for transparency in the configuration, light gray (&7) will be used.");
+        return ChatColor.GRAY;
+    }
+
+    private static int parseBungeeRefreshInterval(int interval) {
+        if (interval < 1) {
+            Log.warning("The minimum interval for pinging BungeeCord's servers is 1 second. It has been automatically set.");
+            return 1;
+        } else if (interval > 60) {
             Log.warning("The maximum interval for pinging BungeeCord's servers is 60 seconds. It has been automatically set.");
-            bungeeRefreshSeconds = 60;
+            return 60;
+        } else {
+            return interval;
         }
     }
+
+    private static int parsePingerTimeout(int timeout) {
+        if (timeout < 100) {
+            Log.warning("The minimum timeout for pinging BungeeCord's servers is 100 milliseconds. It has been automatically set.");
+            return 100;
+        } else if (timeout > 10000) {
+            Log.warning("The maximum timeout for pinging BungeeCord's servers is 10000 milliseconds. It has been automatically set.");
+            return 10000;
+        } else {
+            return timeout;
+        }
+    }
+
+    private static ServerAddress parseServerAddress(String singleServer) {
+        String[] nameAndAddress = Strings.splitAndTrim(singleServer, ":", 2);
+        if (nameAndAddress.length < 2) {
+            Log.warning("The server info \"" + singleServer + "\" is not valid. There should be a name and an address, separated by a colon.");
+            return null;
+        }
+
+        String name = nameAndAddress[0];
+        String address = nameAndAddress[1];
+
+        String ip;
+        int port;
+
+        if (address.contains(":")) {
+            String[] ipAndPort = Strings.splitAndTrim(address, ":", 2);
+            ip = ipAndPort[0];
+            try {
+                port = Integer.parseInt(ipAndPort[1]);
+            } catch (NumberFormatException e) {
+                Log.warning("Invalid port number in the server info \"" + singleServer + "\".");
+                return null;
+            }
+        } else {
+            ip = address;
+            port = 25565; // The default Minecraft port.
+        }
+        
+        return new ServerAddress(name, ip, port);
+    }
+
 }

plugin/src/main/java/me/filoghost/holographicdisplays/disk/CustomPlaceholders.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.disk;
+
+import me.filoghost.fcommons.Colors;
+import me.filoghost.fcommons.config.ConfigSection;
+import me.filoghost.fcommons.config.FileConfig;
+import me.filoghost.fcommons.logging.Log;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class CustomPlaceholders {
+
+    private static final List<StaticPlaceholder> placeholders = new ArrayList<>();
+
+    public static void load(FileConfig config) {
+        placeholders.clear();
+
+        ConfigSection placeholdersSection = config.getConfigSection("placeholders");
+        if (placeholdersSection == null) {
+            return;
+        }
+
+        for (String placeholder : placeholdersSection.getKeys()) {
+            String replacement = Colors.addColors(placeholdersSection.getString(placeholder));
+            if (replacement == null) {
+                return;
+            }
+
+            if (placeholder.length() == 0) {
+                Log.warning("Error in \"" + config.getSourceFile() + "\": placeholder cannot be empty (skipped).");
+                continue;
+            }
+
+            if (placeholder.length() > 100) {
+                Log.warning("Error in \"" + config.getSourceFile() + "\": placeholder cannot be longer than 100 character (" + placeholder + ").");
+                continue;
+            }
+
+            placeholders.add(new StaticPlaceholder(placeholder, replacement));
+        }
+    }
+
+    public static String replaceStaticPlaceholders(String text) {
+        for (StaticPlaceholder staticPlaceholder : placeholders) {
+            text = text.replace(staticPlaceholder.getIdentifier(), staticPlaceholder.getReplacement());
+        }
+        return text;
+    }
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramConfig.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.disk;
+
+import me.filoghost.fcommons.Strings;
+import me.filoghost.fcommons.config.ConfigSection;
+import me.filoghost.holographicdisplays.object.NamedHologram;
+import me.filoghost.holographicdisplays.object.line.CraftHologramLine;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.World;
+
+import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+public class HologramConfig {
+
+    private static final DecimalFormat LOCATION_NUMBER_FORMAT 
+            = new DecimalFormat("0.000", DecimalFormatSymbols.getInstance(Locale.ROOT));
+    
+    private final String name;
+    private final List<String> serializedLines;
+    private final String serializedLocation;
+
+    public HologramConfig(String name, ConfigSection configSection) {
+        this.name = name;
+        this.serializedLines = configSection.getStringList("lines");
+        this.serializedLocation = configSection.getString("location");
+    }
+
+    public HologramConfig(NamedHologram hologram) {
+        this.name = hologram.getName();
+        this.serializedLines = new ArrayList<>();
+        for (CraftHologramLine line : hologram.getLinesUnsafe()) {
+            serializedLines.add(line.getSerializedConfigValue());
+        }
+
+       this.serializedLocation = serializeLocation(hologram.getLocation());
+    }
+
+    public ConfigSection toConfigSection() {
+        ConfigSection configSection = new ConfigSection();
+        configSection.setStringList("lines", serializedLines);
+        configSection.setString("location", serializedLocation);
+        return configSection;
+    }
+
+    public NamedHologram createHologram() throws HologramLoadException {
+        if (serializedLines == null || serializedLines.size() == 0) {
+            throw new HologramLoadException("hologram \"" + name + "\" was found, but it contained no lines");
+        }
+        if (serializedLocation == null) {
+            throw new HologramLoadException("hologram \"" + name + "\" doesn't have a location set");
+        }
+
+        Location location = deserializeLocation(serializedLocation);
+        NamedHologram hologram = new NamedHologram(location, name);
+
+        for (String serializedLine : serializedLines) {
+            try {
+                CraftHologramLine line = HologramLineParser.parseLine(hologram, serializedLine, false);
+                hologram.getLinesUnsafe().add(line);
+            } catch (HologramLoadException e) {
+                // Rethrow with more details
+                throw new HologramLoadException("hologram \"" + hologram.getName() + "\" has an invalid line: " + e.getMessage(), e);
+            }
+        }
+
+        return hologram;
+    }
+
+    private String serializeLocation(Location loc) {
+        return loc.getWorld().getName()
+                + ", " + LOCATION_NUMBER_FORMAT.format(loc.getX())
+                + ", " + LOCATION_NUMBER_FORMAT.format(loc.getY())
+                + ", " + LOCATION_NUMBER_FORMAT.format(loc.getZ());
+    }
+
+    private Location deserializeLocation(String serializedLocation) throws HologramLoadException {
+        String[] parts = Strings.splitAndTrim(serializedLocation, ",");
+
+        if (parts.length != 4) {
+            throw new HologramLoadException("hologram \"" + name + "\" has an invalid location format:"
+                    + " it must be \"world, x, y, z\"");
+        }
+
+        try {
+            String worldName = parts[0];
+            double x = Double.parseDouble(parts[1]);
+            double y = Double.parseDouble(parts[2]);
+            double z = Double.parseDouble(parts[3]);
+
+            World world = Bukkit.getWorld(worldName);
+            if (world == null) {
+                throw new HologramLoadException("hologram \"" + name + "\""
+                        + " was in the world \"" + worldName + "\" but it wasn't loaded");
+            }
+
+            return new Location(world, x, y, z);
+
+        } catch (NumberFormatException ex) {
+            throw new HologramLoadException("hologram \"" + name + "\""
+                    + " has an invalid location format: invalid number");
+        }
+    }
+
+    public String getName() {
+        return name;
+    }
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramDatabase.java

@@ -5,108 +5,64 @@
  */
 package me.filoghost.holographicdisplays.disk;
 
-import me.filoghost.fcommons.logging.Log;
+import me.filoghost.fcommons.config.Config;
+import me.filoghost.fcommons.config.ConfigSection;
 import me.filoghost.holographicdisplays.object.NamedHologram;
-import me.filoghost.holographicdisplays.object.line.CraftHologramLine;
-import org.bukkit.Location;
-import org.bukkit.configuration.ConfigurationSection;
-import org.bukkit.configuration.file.FileConfiguration;
-import org.bukkit.configuration.file.YamlConfiguration;
-import org.bukkit.plugin.Plugin;
 
-import java.io.File;
+import java.util.Collection;
-import java.io.IOException;
+import java.util.LinkedHashMap;
-import java.util.ArrayList;
+import java.util.Map.Entry;
-import java.util.List;
-import java.util.Set;
 
 public class HologramDatabase {
 
-    private static File file;
+    private final LinkedHashMap<String, HologramConfig> hologramConfigs;
-    private static FileConfiguration config;
     
-    public static void loadYamlFile(Plugin plugin) {
+    public HologramDatabase() {
-        file = new File(plugin.getDataFolder(), "database.yml");
+        this.hologramConfigs = new LinkedHashMap<>();
-        
-        if (!file.exists()) {
-            plugin.getDataFolder().mkdirs();
-            plugin.saveResource("database.yml", true);
     }
 
-        config = YamlConfiguration.loadConfiguration(file);
+    public void reloadFromConfig(Config config) {
+        hologramConfigs.clear();
+
+        for (String hologramName : config.getKeys()) {
+            ConfigSection hologramSection = config.getConfigSection(hologramName);
+            if (hologramSection == null) {
+                continue;
             }
 
-    public static NamedHologram loadHologram(String name) throws HologramNotFoundException, LocationFormatException, LocationWorldNotLoadedException, HologramLineParseException {
+            HologramConfig hologramConfig = new HologramConfig(hologramName, hologramSection);
-        ConfigurationSection configSection = config.getConfigurationSection(name);
+            hologramConfigs.put(hologramConfig.getName(), hologramConfig);
-        
-        if (configSection == null) {
-            throw new HologramNotFoundException("hologram \"" + name + "\" not found, skipping it");
-        }
-        
-        List<String> lines = configSection.getStringList("lines");
-        String locationString = configSection.getString("location");
-        
-        if (lines == null || locationString == null || lines.size() == 0) {
-            throw new HologramNotFoundException("hologram \"" + name + "\" was found, but it contained no lines");
-        }
-        
-        Location loc = LocationSerializer.locationFromString(name, locationString);
-        
-        NamedHologram hologram = new NamedHologram(loc, name);
-
-        for (String line : lines) {
-            try {
-                hologram.getLinesUnsafe().add(HologramLineParser.parseLine(hologram, line, false));
-            } catch (HologramLineParseException e) {
-                throw new HologramLineParseException("hologram \"" + hologram.getName() + "\" has an invalid line: " + e.getMessage(), e.getCause());
         }
     }
     
-        return hologram;
+    public Config saveToConfig() {
+        Config config = new Config();
+
+        for (Entry<String, HologramConfig> entry : hologramConfigs.entrySet()) {
+            config.setConfigSection(entry.getKey(), entry.getValue().toConfigSection());
         }
 
-    public static String serializeHologramLine(CraftHologramLine line) {
+        config.setHeader(
-        return line.getSerializedConfigValue();
+                "",
+                "Please do NOT edit this file manually if possible.",
+                ""
+        );
+        
+        return config;
     }
 
-    public static void deleteHologram(String name) {
+    public Collection<HologramConfig> getHolograms() {
-        config.set(name, null);
+        return hologramConfigs.values();
     }
     
-    public static void saveHologram(NamedHologram hologram) {        
+    public void addOrUpdate(NamedHologram hologram) {
-        List<String> serializedLines = new ArrayList<>();
+        HologramConfig hologramConfig = new HologramConfig(hologram);
-        for (CraftHologramLine line : hologram.getLinesUnsafe()) {
+        
-            serializedLines.add(serializeHologramLine(line));
+        hologramConfigs.put(hologram.getName(), hologramConfig);
     }
 
-        ConfigurationSection hologramSection = getOrCreateSection(hologram.getName());        
+    public void removeHologram(NamedHologram hologram) {
-        hologramSection.set("location", LocationSerializer.locationToString(hologram.getLocation()));
+        hologramConfigs.remove(hologram.getName());
-        hologramSection.set("lines", serializedLines);
     }
 
-    public static Set<String> getHolograms() {
-        return config.getKeys(false);
-    }
-    
-    private static ConfigurationSection getOrCreateSection(String name) {
-        if (config.isConfigurationSection(name)) {
-            return config.getConfigurationSection(name);
-        } else {
-            return config.createSection(name);
-        }
-    }
-    
-    public static void saveToDisk() throws IOException {
-        if (config != null && file != null) {
-            config.save(file);
-        }
-    }
-    
-    public static void trySaveToDisk() {
-        try {
-            saveToDisk();
-        } catch (IOException ex) {
-            Log.severe("Unable to save database.yml to disk!", ex);
-        }
-    }
 }

plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramLineParseException.java

@@ -1,18 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.disk;
-
-public class HologramLineParseException extends HologramLoadException {
-
-    public HologramLineParseException(String message) {
-        super(message);
-    }
-
-    public HologramLineParseException(String message, Throwable cause) {
-        super(message, cause);
-    }
-    
-}

plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramLineParser.java

@@ -19,12 +19,13 @@ import org.bukkit.inventory.ItemStack;
 
 public class HologramLineParser {
 
+    private static final String ICON_PREFIX = "icon:";
 
-    public static CraftHologramLine parseLine(NamedHologram hologram, String serializedLine, boolean checkMaterialValidity) throws HologramLineParseException {
+    public static CraftHologramLine parseLine(NamedHologram hologram, String serializedLine, boolean checkMaterialValidity) throws HologramLoadException {
         CraftHologramLine hologramLine;
         
-        if (serializedLine.toLowerCase().startsWith("icon:")) {
+        if (serializedLine.toLowerCase().startsWith(ICON_PREFIX)) {
-            String serializedIcon = serializedLine.substring("icon:".length());
+            String serializedIcon = serializedLine.substring(ICON_PREFIX.length());
             ItemStack icon = parseItemStack(serializedIcon, checkMaterialValidity);
             hologramLine = new CraftItemLine(hologram, icon);
             
@@ -42,7 +43,7 @@ public class HologramLineParser {
     
     
     @SuppressWarnings("deprecation")
-    private static ItemStack parseItemStack(String serializedItem, boolean checkMaterialValidity) throws HologramLineParseException {
+    private static ItemStack parseItemStack(String serializedItem, boolean checkMaterialValidity) throws HologramLoadException {
         serializedItem = serializedItem.trim();
         
         // Parse json
@@ -69,7 +70,7 @@ public class HologramLineParser {
             try {
                 dataValue = (short) Integer.parseInt(materialAndDataValue[1]);
             } catch (NumberFormatException e) {
-                throw new HologramLineParseException("data value \"" + materialAndDataValue[1] + "\" is not a valid number");
+                throw new HologramLoadException("data value \"" + materialAndDataValue[1] + "\" is not a valid number");
             }
             materialName = materialAndDataValue[0];
         } else {
@@ -79,7 +80,7 @@ public class HologramLineParser {
         Material material = MaterialsHelper.matchMaterial(materialName);
         if (material == null) {
             if (checkMaterialValidity) {
-                throw new HologramLineParseException("\"" + materialName + "\" is not a valid material");
+                throw new HologramLoadException("\"" + materialName + "\" is not a valid material");
             }
             material = Material.BEDROCK;
         }
@@ -92,9 +93,9 @@ public class HologramLineParser {
                 MojangsonParser.parse(nbtString);
                 Bukkit.getUnsafe().modifyItemStack(itemStack, nbtString);
             } catch (MojangsonParseException e) {
-                throw new HologramLineParseException("invalid NBT data, " + e.getMessage());
+                throw new HologramLoadException("invalid NBT data, " + e.getMessage());
             } catch (Throwable t) {
-                throw new HologramLineParseException("unexpected exception while parsing NBT data", t);
+                throw new HologramLoadException("unexpected exception while parsing NBT data", t);
             }
         }
         

plugin/src/main/java/me/filoghost/holographicdisplays/disk/HologramNotFoundException.java

@@ -1,14 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.disk;
-
-public class HologramNotFoundException extends HologramLoadException {
-
-    public HologramNotFoundException(String message) {
-        super(message);
-    }
-
-}

plugin/src/main/java/me/filoghost/holographicdisplays/disk/LocationFormatException.java

@@ -1,14 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.disk;
-
-public class LocationFormatException extends HologramLoadException {
-
-    public LocationFormatException(String message) {
-        super(message);
-    }
-
-}

plugin/src/main/java/me/filoghost/holographicdisplays/disk/LocationSerializer.java

@@ -1,56 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.disk;
-
-import me.filoghost.fcommons.Strings;
-import org.bukkit.Bukkit;
-import org.bukkit.Location;
-import org.bukkit.World;
-
-import java.text.DecimalFormat;
-import java.text.DecimalFormatSymbols;
-import java.util.Locale;
-
-public class LocationSerializer {
-    
-    private static DecimalFormat numberFormat = new DecimalFormat("0.000", DecimalFormatSymbols.getInstance(Locale.ROOT));
-
-    public static Location locationFromString(String hologramName, String serializedLocation) throws LocationWorldNotLoadedException, LocationFormatException {
-        if (serializedLocation == null) {
-            throw new LocationFormatException("hologram \"" + hologramName + "\" doesn't have a location set");
-        }
-
-        String[] parts = Strings.splitAndTrim(serializedLocation, ",");
-
-        if (parts.length != 4) {
-            throw new LocationFormatException("hologram \"" + hologramName + "\" has an invalid location format:" 
-                    + " it must be \"world, x, y, z\"");
-        }
-        
-        try {
-            String worldName = parts[0];
-            double x = Double.parseDouble(parts[1]);
-            double y = Double.parseDouble(parts[2]);
-            double z = Double.parseDouble(parts[3]);
-
-            World world = Bukkit.getWorld(worldName);
-            if (world == null) {
-                throw new LocationWorldNotLoadedException("hologram \"" + hologramName + "\"" 
-                        + " was in the world \"" + worldName + "\" but it wasn't loaded");
-            }
-            
-            return new Location(world, x, y, z);
-            
-        } catch (NumberFormatException ex) {
-            throw new LocationFormatException("hologram \"" + hologramName + "\"" 
-                    + " has an invalid location format: invalid number");
-        }
-    }
-    
-    public static String locationToString(Location loc) {
-        return (loc.getWorld().getName() + ", " + numberFormat.format(loc.getX()) + ", " + numberFormat.format(loc.getY()) + ", " + numberFormat.format(loc.getZ()));
-    }
-}

plugin/src/main/java/me/filoghost/holographicdisplays/disk/LocationWorldNotLoadedException.java

@@ -1,14 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.disk;
-
-public class LocationWorldNotLoadedException extends HologramLoadException {
-    
-    public LocationWorldNotLoadedException(String message) {
-        super(message);
-    }
-
-}

plugin/src/main/java/me/filoghost/holographicdisplays/disk/MainConfigModel.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.disk;
+
+import me.filoghost.fcommons.config.Config;
+import me.filoghost.fcommons.config.mapped.ConfigPath;
+import me.filoghost.fcommons.config.mapped.MappedConfig;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class MainConfigModel implements MappedConfig {
+    
+    @ConfigPath("space-between-lines")
+    double spaceBetweenLines = 0.02;
+    
+    @ConfigPath("quick-edit-commands")
+    boolean quickEditCommands = true;
+    
+    @ConfigPath("images.symbol")
+    String imageSymbol = "[x]";
+    
+    @ConfigPath("images.transparency.space")
+    String transparencySymbol = " [|] ";
+    
+    @ConfigPath("images.transparency.color")
+    String transparencyColor = "&7";
+
+    @ConfigPath("bungee.refresh-seconds")
+    int bungeeRefreshSeconds = 3;
+
+    @ConfigPath("bungee.use-RedisBungee")
+    boolean useRedisBungee = false;
+
+    @ConfigPath("bungee.pinger.enable")
+    boolean pingerEnable = false;
+
+    @ConfigPath("bungee.pinger.timeout")
+    int pingerTimeout = 500;
+
+    @ConfigPath("bungee.pinger.offline-motd")
+    String pingerOfflineMotd = "&cOffline, couldn't get the MOTD";
+
+    @ConfigPath("bungee.pinger.status.online")
+    String pingerStatusOnline = "&aOnline";
+
+    @ConfigPath("bungee.pinger.status.offline")
+    String pingerStatusOffline = "&cOffline";
+
+    @ConfigPath("bungee.pinger.motd-remove-leading-trailing-spaces")
+    boolean pingerTrimMotd = true;
+
+    @ConfigPath("bungee.pinger.servers")
+    List<String> pingerServers = Arrays.asList("hub: 127.0.0.1:25565", "games: 127.0.0.1:25566");
+
+    @ConfigPath("time.format")
+    String timeFormat = "H:mm";
+
+    @ConfigPath("time.zone")
+    String timeZone = "GMT+1";
+    
+    @ConfigPath("update-notification")
+    boolean updateNotification = true;
+
+    @ConfigPath("debug")
+    boolean debug = false;
+    
+    @Override
+    public List<String> getHeader() {
+        return Arrays.asList(
+                "",
+                "Plugin page: https://dev.bukkit.org/projects/holographic-displays",
+                "",
+                "Created by filoghost.",
+                ""
+        );
+    }
+
+    @Override
+    public boolean beforeSave(Config rawConfig) {
+        List<String> pathsToRemove = Arrays.asList(
+                "vertical-spacing",
+                "time-format",
+                "bungee-refresh-seconds",
+                "using-RedisBungee",
+                "bungee-online-format",
+                "bungee-offline-format",
+                "precise-hologram-movement"
+        );
+
+        boolean modified = false;
+        
+        for (String path : pathsToRemove) {
+            if (rawConfig.get(path) != null) {
+                rawConfig.remove(path);
+                modified = true;
+            }
+        }
+        
+        return modified;
+    }
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/disk/ServerAddress.java

@@ -7,14 +7,20 @@ package me.filoghost.holographicdisplays.disk;
 
 public class ServerAddress {
     
+    private String name;
     private String ip;
     private int port;
     
-    public ServerAddress(String ip, int port) {
+    public ServerAddress(String name, String ip, int port) {
+        this.name = name;
         this.ip = ip;
         this.port = port;
     }
 
+    public String getName() {
+        return name;
+    }
+
     public String getAddress() {
         return ip;
     }
@@ -25,7 +31,7 @@ public class ServerAddress {
     
     @Override
     public String toString() {
-        return ip + ":" + port;
+        return name + " (" + ip + ":" + port + ")";
     }
     
 }

plugin/src/main/java/me/filoghost/holographicdisplays/disk/StaticPlaceholder.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.disk;
+
+public class StaticPlaceholder {
+
+    private final String identifier;
+    private final String replacement;
+
+    public StaticPlaceholder(String identifier, String replacement) {
+        this.identifier = identifier;
+        this.replacement = replacement;
+    }
+
+    public String getIdentifier() {
+        return identifier;
+    }
+
+    public String getReplacement() {
+        return replacement;
+    }
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/disk/StringConverter.java

@@ -20,7 +20,7 @@ public class StringConverter {
             return null;
         }
 
-        input = UnicodeSymbols.placeholdersToSymbols(input);
+        input = CustomPlaceholders.replaceStaticPlaceholders(input);
         input = Colors.addColors(input);
         return input;
     }

plugin/src/main/java/me/filoghost/holographicdisplays/disk/UnicodeSymbols.java

@@ -1,103 +0,0 @@
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-
-/*
- * Copyright (C) filoghost and contributors
- *
- * SPDX-License-Identifier: GPL-3.0-or-later
- */
-package me.filoghost.holographicdisplays.disk;
-
-import me.filoghost.fcommons.logging.Log;
-import me.filoghost.holographicdisplays.HolographicDisplays;
-import org.apache.commons.lang.StringEscapeUtils;
-import org.bukkit.plugin.Plugin;
-
-import java.io.IOException;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-
-public class UnicodeSymbols {
-
-    private static Map<String, String> placeholders = new HashMap<>();
-    
-    public static void load(Plugin plugin) {
-        placeholders.clear();
-        
-        Path file = HolographicDisplays.getDataFolderPath().resolve("symbols.yml");
-        
-        if (!Files.isRegularFile(file)) {
-            plugin.saveResource("symbols.yml", true);
-        }
-        
-        List<String> lines;
-        try {
-            lines = Files.readAllLines(file);
-        } catch (IOException e) {
-            Log.warning("I/O error while reading symbols.yml. Was the file in use?", e);
-            return;
-        } catch (Exception e) {
-            Log.warning("Unhandled exception while reading symbols.yml!", e);
-            return;
-        }
-        
-        for (String line : lines) {
-            
-            // Comment or empty line.
-            if (line.length() == 0 || line.startsWith("#"))  {
-                continue;
-            }
-            
-            if (!line.contains(":")) {
-                Log.warning("Unable to parse a line(" + line + ") from symbols.yml: it must contain ':' to separate the placeholder and the replacement.");
-                continue;
-            }
-                
-            int indexOf = line.indexOf(':');
-            String placeholder = unquote(line.substring(0, indexOf).trim());
-            String replacement = StringEscapeUtils.unescapeJava(unquote(line.substring(indexOf + 1).trim()));
-
-            if (placeholder.isEmpty() || replacement.isEmpty()) {
-                Log.warning("Unable to parse a line(" + line + ") from symbols.yml: the placeholder and the replacement must have both at least 1 character.");
-                continue;
-            }
-            
-            if (placeholder.length() > 30) {
-                Log.warning("Unable to parse a line(" + line + ") from symbols.yml: the placeholder cannot be longer than 30 characters.");
-                continue;
-            }
-            
-            placeholders.put(placeholder, replacement);
-        }
-    }
-    
-    
-    protected static String placeholdersToSymbols(String input) {
-        for (Entry<String, String> entry : placeholders.entrySet()) {
-            input = input.replace(entry.getKey(), entry.getValue());
-        }
-        return input;
-    }
-    
-    
-    private static String unquote(String input) {
-        if (input.length() < 2) {
-            // Cannot be quoted.
-            return input;
-        }
-        if (input.startsWith("'") && input.endsWith("'")) {
-            return input.substring(1, input.length() - 1);
-        } else if (input.startsWith("\"") && input.endsWith("\"")) {
-            return input.substring(1, input.length() - 1);
-        }
-        
-        return input;
-    }
-}

plugin/src/main/java/me/filoghost/holographicdisplays/disk/upgrade/LegacySymbolsUpgrader.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) filoghost and contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+package me.filoghost.holographicdisplays.disk.upgrade;
+
+import me.filoghost.fcommons.Strings;
+import me.filoghost.fcommons.config.Config;
+import me.filoghost.fcommons.config.ConfigErrors;
+import me.filoghost.fcommons.config.ConfigLoader;
+import me.filoghost.fcommons.config.exception.ConfigLoadException;
+import me.filoghost.fcommons.config.exception.ConfigSaveException;
+import me.filoghost.fcommons.logging.Log;
+import me.filoghost.holographicdisplays.disk.ConfigManager;
+import org.apache.commons.lang.StringEscapeUtils;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.List;
+
+public class LegacySymbolsUpgrader {
+    
+    public static void run(ConfigManager configManager) throws ConfigLoadException, ConfigSaveException {
+        Path oldFile = configManager.getRootDataFolder().resolve("symbols.yml");
+        ConfigLoader newConfigLoader = configManager.getConfigLoader("custom-placeholders.yml");
+        Path newFile = newConfigLoader.getFile();
+
+        if (!Files.isRegularFile(oldFile)) {
+            return; // Old file doesn't exist, ignore upgrade
+        }
+        
+        if (Files.isRegularFile(newFile)) {
+            return; // Already created, do not override
+        }
+
+        Config newConfig = new Config();
+        List<String> lines;
+        try {
+            lines = Files.readAllLines(oldFile);
+        } catch (IOException e) {
+            throw new ConfigLoadException(ConfigErrors.readIOException, e);
+        }
+
+        for (String line : lines) {
+            // Comment or empty line
+            if (line.isEmpty() || line.startsWith("#")) {
+                continue;
+            }
+
+            // Ignore bad line
+            if (!line.contains(":")) {
+                Log.warning("Couldn't convert invalid line in " + oldFile.getFileName() + ": " + line);
+                continue;
+            }
+
+            String[] parts = Strings.splitAndTrim(line, ":", 2);
+            String placeholder = unquote(parts[0]);
+            String replacement = StringEscapeUtils.unescapeJava(unquote(parts[1]));
+
+            newConfig.setString("placeholders." + placeholder, replacement);
+        }
+
+        try {
+            Files.move(oldFile, oldFile.resolveSibling("symbols.yml.backup"));
+        } catch (IOException e) {
+            Log.warning("Couldn't rename " + oldFile.getFileName(), e);
+        }
+        newConfigLoader.save(newConfig);
+    }
+
+    private static String unquote(String input) {
+        if (input.length() < 2) {
+            // Too short, cannot be a quoted string
+            return input;
+        }
+        if (input.startsWith("'") && input.endsWith("'")) {
+            return input.substring(1, input.length() - 1);
+        } else if (input.startsWith("\"") && input.endsWith("\"")) {
+            return input.substring(1, input.length() - 1);
+        }
+
+        return input;
+    }
+
+}

plugin/src/main/java/me/filoghost/holographicdisplays/task/StartupLoadHologramsTask.java

@@ -7,32 +7,35 @@ package me.filoghost.holographicdisplays.task;
 
 import me.filoghost.fcommons.logging.Log;
 import me.filoghost.holographicdisplays.common.Utils;
-import me.filoghost.holographicdisplays.disk.HologramDatabase;
+import me.filoghost.holographicdisplays.disk.HologramConfig;
 import me.filoghost.holographicdisplays.disk.HologramLoadException;
 import me.filoghost.holographicdisplays.object.NamedHologram;
 import me.filoghost.holographicdisplays.object.NamedHologramManager;
 
-import java.util.Set;
+import java.util.Collection;
 
 public class StartupLoadHologramsTask implements Runnable {
 
+    private Collection<HologramConfig> hologramConfigsToLoad;
+
+    public StartupLoadHologramsTask(Collection<HologramConfig> hologramConfigsToLoad) {
+        this.hologramConfigsToLoad = hologramConfigsToLoad;
+    }
+
     @Override
     public void run() {
-        Set<String> savedHologramsNames = HologramDatabase.getHolograms();
+        for (HologramConfig hologramConfig : hologramConfigsToLoad) {
-        if (savedHologramsNames != null) {
-            for (String hologramName : savedHologramsNames) {
             try {
-                    NamedHologram namedHologram = HologramDatabase.loadHologram(hologramName);
+                NamedHologram hologram = hologramConfig.createHologram();
-                    NamedHologramManager.addHologram(namedHologram);
+                NamedHologramManager.addHologram(hologram);
-                    namedHologram.refreshAll();
+                hologram.refreshAll();
             } catch (HologramLoadException e) {
                 Log.warning(Utils.formatExceptionMessage(e));
             } catch (Exception e) {
-                    Log.warning("Unexpected exception while loading the hologram \"" + hologramName + "\"." 
+                Log.warning("Unexpected exception while loading the hologram \"" + hologramConfig.getName() + "\"."
                         + " Please contact the developer.", e);
             }
         }
     }
-    }
 
 }

plugin/src/main/resources/config.yml

@@ -1,20 +0,0 @@
-#.
-#.  Read the tutorial at: http://dev.bukkit.org/bukkit-plugins/holographic-displays/
-#.
-#.  Plugin created by filoghost.
-#.
-space-between-lines: 0.02
-quick-edit-commands: true
-images:
-  symbol: '[x]'
-  transparency:
-    space: ' [|] '
-    color: '&7'
-bungee:
-  refresh-seconds: 3
-  use-RedisBungee: false
-time:
-  format: H:mm
-  zone: GMT+1
-update-notification: true
-debug: false

plugin/src/main/resources/custom-placeholders.yml

@@ -0,0 +1,14 @@
+#
+# This is the configuration file for custom placeholders.
+# Dynamic placeholders are {online}, {max_players}...
+#
+# You can use these to avoid repeating text multiple times,
+# and edit it from a single location.
+#
+# Another use would be for defining colors, symbols, or text decorations.
+#
+placeholders:
+  '{custom_placeholder}': 'This is a custom placeholder.'
+  '{primary_color}': '&b'
+  '{secondary_color}': '&7'
+  '{separator}': '&8&m          '

plugin/src/main/resources/database.yml

@@ -1,3 +0,0 @@
-#.
-#.  Please do NOT edit this file manually.
-#.

plugin/src/main/resources/symbols.yml

@@ -1,14 +0,0 @@
-#
-# This is the configuration file for static placeholders.
-# Dynamic placeholders are {online}, {max_players}, ...
-# Static placeholders are symbols.
-#
-# List of unicode symbols: http://www.fileformat.info/info/unicode/index.htm
-#
-[x]: \u2588
-[/]: \u258C
-[.]: \u2591
-[..]: \u2592
-[...]: \u2593
-[p]: \u2022
-[|]: \u23B9