feat: initial i18n support

nicko-core/src/main/java/net/artelnatif/nicko/NickoBukkit.java

@@ -6,6 +6,7 @@ import net.artelnatif.nicko.command.NickoTabCompleter;
 import net.artelnatif.nicko.config.NickoConfiguration;
 import net.artelnatif.nicko.event.PlayerJoinListener;
 import net.artelnatif.nicko.event.PlayerQuitListener;
+import net.artelnatif.nicko.i18n.I18N;
 import net.artelnatif.nicko.impl.Internals;
 import net.artelnatif.nicko.impl.InternalsProvider;
 import net.artelnatif.nicko.mojang.MojangAPI;
@@ -15,6 +16,7 @@ import net.artelnatif.nicko.utils.ServerUtils;
 import org.bukkit.command.PluginCommand;
 import org.bukkit.plugin.java.JavaPlugin;
 
+import java.util.Locale;
 import java.util.logging.Level;
 
 public class NickoBukkit extends JavaPlugin {
@@ -23,6 +25,7 @@ public class NickoBukkit extends JavaPlugin {
     private NickoConfiguration nickoConfiguration;
     private MojangAPI mojangAPI;
     private PlayerDataStore dataStore;
+    private I18N i18N;
 
     @Override
     public void onEnable() {
@@ -38,6 +41,10 @@ public class NickoBukkit extends JavaPlugin {
         if (getServer().getPluginManager().isPluginEnabled(this)) {
             mojangAPI = new MojangAPI();
 
+            getLogger().info("Loading locale...");
+            Locale.setDefault(Locale.ENGLISH);
+            i18N = new I18N(this);
+
             final PluginCommand command = getCommand("nicko");
             if (command != null) {
                 command.setExecutor(new NickoCommand());

nicko-core/src/main/java/net/artelnatif/nicko/config/NickoConfiguration.java

@@ -15,6 +15,8 @@ public class NickoConfiguration {
         return getConfig().getString("prefix");
     }
 
+    public String getLocale() { return getConfig().getString("locale"); }
+
     public String getDisguiseKitHeader() {
         return getConfig().getString("disguisekit.header");
     }

nicko-core/src/main/java/net/artelnatif/nicko/i18n/I18N.java

@@ -1,13 +1,36 @@
 package net.artelnatif.nicko.i18n;
 
 import net.artelnatif.nicko.NickoBukkit;
+import org.apache.commons.lang.LocaleUtils;
+
+import java.text.MessageFormat;
+import java.util.Locale;
+import java.util.ResourceBundle;
 
 public class I18N {
-    public static final class Message {
-        public static final String BASE = NickoBukkit.getInstance().getNickoConfig().getPrefix() + " ";
+    private final NickoBukkit instance;
+    private final MessageFormat formatter = new MessageFormat("");
 
-        public static final class Command {
-            public static final String TARGET_OFFLINE = BASE + "§cSpecified player is offline. Try again.";
+    public I18N(NickoBukkit instance) {
+        this.instance = instance;
+        formatter.setLocale(getLocale());
     }
+
+    private Locale getLocale() {
+        try {
+            return LocaleUtils.toLocale(instance.getNickoConfig().getLocale());
+        } catch (IllegalArgumentException exception) {
+            instance.getLogger().severe("Invalid locale provided, defaulting to " + Locale.getDefault().getDisplayName() + ".");
+            return Locale.getDefault();
+        }
+    }
+
+    private ResourceBundle getBundle() {
+        return ResourceBundle.getBundle("locale", getLocale());
+    }
+
+    public String get(String key, Object... arguments) {
+        formatter.applyPattern(getBundle().getString(key));
+        return formatter.format(arguments);
     }
 }

nicko-core/src/main/java/net/artelnatif/nicko/utils/FileUtils.java

@@ -0,0 +1,13 @@
+package net.artelnatif.nicko.utils;
+
+import java.io.File;
+import java.io.IOException;
+
+public class FileUtils {
+    public static boolean isPresentOrCreate(File file) throws IOException {
+        if (!file.exists()) {
+            return file.createNewFile();
+        }
+        return true;
+    }
+}

nicko-core/src/main/resources/locale_en.properties

@@ -0,0 +1 @@
+player.offline="§c{0} §fis offline, please try again."

nicko-core/src/main/resources/locale_fr.properties

@@ -0,0 +1 @@
+player.offline="§c{0} §fest hors-ligne, veuillez réessayer."