Add ViaVersion dump command to get all the relevant info we need by bug reports.

src/main/java/us/myles/ViaVersion/commands/ViaCommandHandler.java

@@ -132,6 +132,7 @@ public class ViaCommandHandler implements ViaVersionCommand, CommandExecutor, Ta
         registerSubCommand(new ListSubCmd());
         registerSubCommand(new PPSSubCmd());
         registerSubCommand(new DebugSubCmd());
+        registerSubCommand(new DumpSubCmd());
         registerSubCommand(new DisplayLeaksSubCmd());
         registerSubCommand(new DontBugMeSubCmd());
         registerSubCommand(new AutoTeamSubCmd());

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

@@ -0,0 +1,91 @@
+package us.myles.ViaVersion.commands.defaultsubs;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonObject;
+import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.plugin.Plugin;
+import us.myles.ViaVersion.ViaVersionPlugin;
+import us.myles.ViaVersion.api.ViaVersion;
+import us.myles.ViaVersion.api.command.ViaSubCommand;
+import us.myles.ViaVersion.api.protocol.ProtocolRegistry;
+import us.myles.ViaVersion.dump.DumpTemplate;
+import us.myles.ViaVersion.dump.PluginInfo;
+import us.myles.ViaVersion.dump.VersionInfo;
+
+import java.io.InputStreamReader;
+import java.io.InvalidObjectException;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.nio.charset.Charset;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.logging.Level;
+
+public class DumpSubCmd extends ViaSubCommand {
+    private final Gson gson = new GsonBuilder().setPrettyPrinting().create();
+
+    @Override
+    public String name() {
+        return "dump";
+    }
+
+    @Override
+    public String description() {
+        return "Dump information about your server, this is helpful if you report bugs.";
+    }
+
+    @Override
+    public boolean execute(final CommandSender sender, String[] args) {
+        VersionInfo version = new VersionInfo(
+                Bukkit.getServer().getVersion(),
+                Bukkit.getServer().getBukkitVersion(),
+                System.getProperty("java.version"),
+                System.getProperty("os.name"),
+                ProtocolRegistry.SERVER_PROTOCOL,
+                ProtocolRegistry.getSupportedVersions());
+
+        List<PluginInfo> plugins = new ArrayList<>();
+        for (Plugin p : Bukkit.getPluginManager().getPlugins())
+            plugins.add(new PluginInfo(p.isEnabled(), p.getDescription().getName(), p.getDescription().getVersion(), p.getDescription().getMain(), p.getDescription().getAuthors()));
+
+        final DumpTemplate template = new DumpTemplate(version, plugins);
+
+        Bukkit.getScheduler().runTaskAsynchronously((ViaVersionPlugin) ViaVersion.getInstance(), new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    HttpURLConnection con = (HttpURLConnection) new URL("http://hastebin.com/documents").openConnection();
+
+                    con.setRequestProperty("Content-Type", "text/plain");
+                    con.setRequestMethod("POST");
+                    con.setDoOutput(true);
+
+                    OutputStream out = con.getOutputStream();
+                    out.write(gson.toJson(template).getBytes(Charset.forName("UTF-8")));
+                    out.close();
+
+                    JsonObject output = gson.fromJson(new InputStreamReader(con.getInputStream()), JsonObject.class);
+                    con.getInputStream().close();
+
+                    if (!output.has("key"))
+                        throw new InvalidObjectException("Key is not given in Hastebin output");
+
+                    sender.sendMessage(ChatColor.GREEN + "We've made a dump with useful information, report your issue and provide this url: " + getUrl(output.get("key").getAsString()));
+                } catch (Exception e) {
+                    sender.sendMessage(ChatColor.RED + "Failed to dump, please check the console for more information");
+                    ((ViaVersionPlugin) ViaVersion.getInstance()).getLogger().log(Level.WARNING, "Could not paste ViaVersion dump to Hastebin", e);
+                }
+            }
+        });
+
+        return true;
+    }
+
+    private String getUrl(String id) {
+        return String.format("http://hastebin.com/%s.json", id);
+    }
+}

src/main/java/us/myles/ViaVersion/dump/DumpTemplate.java

@@ -0,0 +1,13 @@
+package us.myles.ViaVersion.dump;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+import java.util.List;
+
+@Data
+@AllArgsConstructor
+public class DumpTemplate {
+    private VersionInfo versions;
+    private List<PluginInfo> plugins;
+}

src/main/java/us/myles/ViaVersion/dump/PluginInfo.java

@@ -0,0 +1,16 @@
+package us.myles.ViaVersion.dump;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+import java.util.List;
+
+@Data
+@AllArgsConstructor
+public class PluginInfo {
+    private boolean enabled;
+    private String name;
+    private String version;
+    private String main;
+    private List<String> authors;
+}

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

@@ -0,0 +1,18 @@
+package us.myles.ViaVersion.dump;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+import java.util.Set;
+
+@Data
+@AllArgsConstructor
+public class VersionInfo {
+    private String version;
+    private String bukkitVersion;
+    private String javaVersion;
+    private String operatingSystem;
+    private int serverProtocol;
+    private Set<Integer> enabledPipelines;
+}
+