Added ability to customize translations (#692)

* Added ability to customize translations

* Removed remaining usage of `Paths#get`

As of java 11 its replacement `Path#of` was created, which is called when using `Paths#get`, besides, according to documentation, it mentions that it can be deprecated at any time

And fix a minor typo in LegacyChannelIdentifier

api/src/main/java/com/velocitypowered/api/proxy/messages/LegacyChannelIdentifier.java

@@ -13,7 +13,7 @@ import java.util.Objects;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 /**
- * Reperesents a legacy channel identifier (for Minecraft 1.12 and below). For modern 1.13 plugin
+ * Represents a legacy channel identifier (for Minecraft 1.12 and below). For modern 1.13 plugin
  * messages, please see {@link MinecraftChannelIdentifier}. This class is immutable and safe for
  * multi-threaded use.
  */

native/src/main/java/com/velocitypowered/natives/util/Natives.java

@@ -29,7 +29,6 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
 
 public class Natives {
@@ -70,7 +69,7 @@ public class Natives {
   private static Path createTemporaryNativeFilename(String ext) throws IOException {
     String temporaryFolderPath = System.getProperty("velocity.natives-tmpdir");
     if (temporaryFolderPath != null) {
-      return Files.createTempFile(Paths.get(temporaryFolderPath), "native-", ext);
+      return Files.createTempFile(Path.of(temporaryFolderPath), "native-", ext);
     } else {
       return Files.createTempFile("native-", ext);
     }

proxy/src/main/java/com/velocitypowered/proxy/Metrics.java

@@ -21,7 +21,7 @@ import com.velocitypowered.proxy.config.VelocityConfiguration;
 
 import java.io.File;
 import java.io.IOException;
-import java.nio.file.Paths;
+import java.nio.file.Path;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.regex.Matcher;
@@ -42,7 +42,7 @@ public class Metrics {
   private MetricsBase metricsBase;
 
   private Metrics(Logger logger, int serviceId, boolean defaultEnabled) {
-    File configFile = Paths.get("plugins").resolve("bStats").resolve("config.txt").toFile();
+    File configFile = Path.of("plugins", "bStats", "config.txt").toFile();
     MetricsConfig config;
     try {
       config = new MetricsConfig(configFile, defaultEnabled);

proxy/src/main/java/com/velocitypowered/proxy/VelocityServer.java

@@ -67,10 +67,10 @@ import io.netty.channel.Channel;
 import io.netty.channel.ChannelInitializer;
 import io.netty.channel.EventLoopGroup;
 import java.io.IOException;
+import java.io.InputStream;
 import java.net.InetSocketAddress;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.security.AccessController;
 import java.security.KeyPair;
 import java.security.PrivilegedAction;
@@ -252,27 +252,44 @@ public class VelocityServer implements ProxyServer, ForwardingAudience {
       FileSystemUtils.visitResources(VelocityServer.class, path -> {
         logger.info("Loading localizations...");
 
+        final Path langPath = Path.of("lang");
+
         try {
+          if (!Files.exists(langPath)) {
+            Files.createDirectory(langPath);
             Files.walk(path).forEach(file -> {
               if (!Files.isRegularFile(file)) {
                 return;
               }
+              try {
+                Path langFile = langPath.resolve(file.getFileName().toString());
+                if (!Files.exists(langFile)) {
+                  try (InputStream is = Files.newInputStream(file)) {
+                    Files.copy(is, langFile);
+                  }
+                }
+              } catch (IOException e) {
+                logger.error("Encountered an I/O error whilst loading translations", e);
+              }
+            });
+          }
+
+
+          Files.walk(langPath).forEach(file -> {
+            if (!Files.isRegularFile(file)) {
+              return;
+            }
 
             String filename = com.google.common.io.Files
                 .getNameWithoutExtension(file.getFileName().toString());
             String localeName = filename.replace("messages_", "")
                 .replace("messages", "")
                 .replace('_', '-');
-            Locale locale;
-            if (localeName.isEmpty()) {
-              locale = Locale.US;
-            } else {
-              locale = Locale.forLanguageTag(localeName);
-            }
+            Locale locale = localeName.isBlank()
+                ? Locale.US
+                : Locale.forLanguageTag(localeName);
 
-            translationRegistry.registerAll(locale,
-                ResourceBundle.getBundle("com/velocitypowered/proxy/l10n/messages",
-                    locale, UTF8ResourceBundleControl.get()), false);
+            translationRegistry.registerAll(locale, file, false);
             ClosestLocaleMatcher.INSTANCE.registerKnown(locale);
           });
         } catch (IOException e) {
@@ -289,7 +306,7 @@ public class VelocityServer implements ProxyServer, ForwardingAudience {
   @SuppressFBWarnings("DM_EXIT")
   private void doStartupConfigLoad() {
     try {
-      Path configPath = Paths.get("velocity.toml");
+      Path configPath = Path.of("velocity.toml");
       configuration = VelocityConfiguration.read(configPath);
 
       if (!configuration.validate()) {
@@ -311,7 +328,7 @@ public class VelocityServer implements ProxyServer, ForwardingAudience {
     logger.info("Loading plugins...");
 
     try {
-      Path pluginPath = Paths.get("plugins");
+      Path pluginPath = Path.of("plugins");
 
       if (!pluginPath.toFile().exists()) {
         Files.createDirectory(pluginPath);
@@ -363,7 +380,7 @@ public class VelocityServer implements ProxyServer, ForwardingAudience {
    * @throws IOException if we can't read {@code velocity.toml}
    */
   public boolean reloadConfiguration() throws IOException {
-    Path configPath = Paths.get("velocity.toml");
+    Path configPath = Path.of("velocity.toml");
     VelocityConfiguration newConfiguration = VelocityConfiguration.read(configPath);
 
     if (!newConfiguration.validate()) {

proxy/src/main/java/com/velocitypowered/proxy/config/VelocityConfiguration.java

@@ -38,7 +38,6 @@ import java.net.URL;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
 import java.security.SecureRandom;
 import java.util.HashMap;
@@ -219,7 +218,7 @@ public class VelocityConfiguration implements ProxyConfig {
   }
 
   private void loadFavicon() {
-    Path faviconPath = Paths.get("server-icon.png");
+    Path faviconPath = Path.of("server-icon.png");
     if (Files.exists(faviconPath)) {
       try {
         this.favicon = Favicon.create(faviconPath);

proxy/src/main/java/com/velocitypowered/proxy/util/FileSystemUtils.java

@@ -26,7 +26,6 @@ import java.nio.file.FileSystem;
 import java.nio.file.FileSystems;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -83,7 +82,7 @@ public class FileSystemUtils {
       } catch (URISyntaxException e) {
         throw new IllegalStateException(e);
       }
-      consumer.accept(Paths.get(uri));
+      consumer.accept(Path.of(uri));
       return true;
     }
   }