Add subplatform versions to dumps

common/src/main/java/us/myles/ViaVersion/ViaManager.java

@@ -14,6 +14,7 @@ import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.TabCompleteThread;
 import us.myles.ViaVersion.protocols.protocol1_9to1_8.ViaIdleThread;
 import us.myles.ViaVersion.update.UpdateUtil;
 
+import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
@@ -25,6 +26,7 @@ public class ViaManager {
     private final ViaInjector injector;
     private final ViaCommandHandler commandHandler;
     private final ViaPlatformLoader loader;
+    private final Set<String> subPlatforms = new HashSet<>();
     private boolean debug;
 
     @Builder
@@ -170,6 +172,16 @@ public class ViaManager {
         return loader;
     }
 
+    /**
+     * Returns a mutable set of self-added subplatform version strings.
+     * This set is expanded by the subplatform itself (e.g. ViaBackwards), and may not contain all running ones.
+     *
+     * @return mutable set of subplatform versions
+     */
+    public Set<String> getSubPlatforms() {
+        return subPlatforms;
+    }
+
     public UserConnection getConnection(UUID playerUUID) {
         return platform.getConnectionManager().getConnectedClient(playerUUID);
     }

common/src/main/java/us/myles/ViaVersion/commands/defaultsubs/DumpSubCmd.java

@@ -18,7 +18,7 @@ import java.io.InvalidObjectException;
 import java.io.OutputStream;
 import java.net.HttpURLConnection;
 import java.net.URL;
-import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.util.Map;
 import java.util.logging.Level;
 
@@ -34,10 +34,9 @@ public class DumpSubCmd extends ViaSubCommand {
         return "Dump information about your server, this is helpful if you report bugs.";
     }
 
-
     @Override
-    public boolean execute(final ViaCommandSender sender, String[] args) {
+    public boolean execute(ViaCommandSender sender, String[] args) {
-        final VersionInfo version = new VersionInfo(
+        VersionInfo version = new VersionInfo(
                 System.getProperty("java.version"),
                 System.getProperty("os.name"),
                 ProtocolRegistry.SERVER_PROTOCOL,
@@ -45,12 +44,13 @@ public class DumpSubCmd extends ViaSubCommand {
                 Via.getPlatform().getPlatformName(),
                 Via.getPlatform().getPlatformVersion(),
                 Via.getPlatform().getPluginVersion(),
-                ViaManager.class.getPackage().getImplementationVersion()
+                ViaManager.class.getPackage().getImplementationVersion(),
+                Via.getManager().getSubPlatforms()
         );
 
         Map<String, Object> configuration = Via.getPlatform().getConfigurationProvider().getValues();
 
-        final DumpTemplate template = new DumpTemplate(version, configuration, Via.getPlatform().getDump(), Via.getManager().getInjector().getDump());
+        DumpTemplate template = new DumpTemplate(version, configuration, Via.getPlatform().getDump(), Via.getManager().getInjector().getDump());
 
         Via.getPlatform().runAsync(new Runnable() {
             @Override
@@ -71,7 +71,7 @@ public class DumpSubCmd extends ViaSubCommand {
                     con.setDoOutput(true);
 
                     OutputStream out = con.getOutputStream();
-                    out.write(GsonUtil.getGsonBuilder().setPrettyPrinting().create().toJson(template).getBytes(Charset.forName("UTF-8")));
+                    out.write(GsonUtil.getGsonBuilder().setPrettyPrinting().create().toJson(template).getBytes(StandardCharsets.UTF_8));
                     out.close();
 
                     if (con.getResponseCode() == 429) {

common/src/main/java/us/myles/ViaVersion/dump/VersionInfo.java

@@ -11,9 +11,10 @@ public class VersionInfo {
     private final String platformVersion;
     private final String pluginVersion;
     private final String implementationVersion;
+    private final Set<String> subPlatforms;
 
     public VersionInfo(String javaVersion, String operatingSystem, int serverProtocol, Set<Integer> enabledProtocols,
-                       String platformName, String platformVersion, String pluginVersion, String implementationVersion) {
+                       String platformName, String platformVersion, String pluginVersion, String implementationVersion, Set<String> subPlatforms) {
         this.javaVersion = javaVersion;
         this.operatingSystem = operatingSystem;
         this.serverProtocol = serverProtocol;
@@ -22,6 +23,7 @@ public class VersionInfo {
         this.platformVersion = platformVersion;
         this.pluginVersion = pluginVersion;
         this.implementationVersion = implementationVersion;
+        this.subPlatforms = subPlatforms;
     }
 
     public String getJavaVersion() {
@@ -55,5 +57,9 @@ public class VersionInfo {
     public String getImplementationVersion() {
         return implementationVersion;
     }
+
+    public Set<String> getSubPlatforms() {
+        return subPlatforms;
+    }
 }