Introduce a new arguments parser (#1629)

Original commits:

* Clean-up

* Introduce a new application arguments parser & handler

* Clean-up and deprecate `Tools#getLanguageOption`

* Fix `-debug` and `-debugall` parameters

* found this while debugging, ...why

* Remove deprecated parameters

* Invoke startup argument parser before handbook generation

* Move command map instantiation to `Grasscutter `(prevent making 3 instances on startup)

* Ensure \n at EOF

Co-authored-by: AnimeGitB <AnimeGitB@bigblueball.in>

.editorconfig

@@ -5,7 +5,7 @@ charset = utf-8
 end_of_line = lf
 indent_size = 4
 indent_style = space
-insert_final_newline = false
+insert_final_newline = true
 max_line_length = 120
 tab_width = 4
 trim_trailing_whitespace = true

.gitattributes

@@ -0,0 +1,6 @@
+*.java text=auto
+*.json text=auto
+*.md text=auto
+*.properties text=auto
+*.py text=auto
+*.sh text=auto

src/main/java/emu/grasscutter/Grasscutter.java

@@ -29,7 +29,10 @@ import emu.grasscutter.server.http.handlers.LogHandler;
 import emu.grasscutter.tools.Tools;
 import emu.grasscutter.utils.Crypto;
 import emu.grasscutter.utils.Language;
+import emu.grasscutter.utils.StartupArguments;
 import emu.grasscutter.utils.Utils;
+import lombok.Getter;
+import lombok.Setter;
 import org.jline.reader.EndOfFileException;
 import org.jline.reader.LineReader;
 import org.jline.reader.LineReaderBuilder;
@@ -57,10 +60,13 @@ public final class Grasscutter {
     public static final File configFile = new File("./config.json");
 
     private static int day; // Current day of week.
+    @Getter @Setter private static String preferredLanguage;
 
     private static HttpServer httpServer;
     private static GameServer gameServer;
     private static PluginManager pluginManager;
+    @Getter private static CommandMap commandMap;
+
     private static AuthenticationSystem authenticationSystem;
     private static PermissionHandler permissionHandler;
 
@@ -89,60 +95,17 @@ public final class Grasscutter {
 
     public static void main(String[] args) throws Exception {
         Crypto.loadKeys(); // Load keys from buffers.
+
+        // Parse start-up arguments.
+        if(StartupArguments.parse(args)) {
+            System.exit(0); // Exit early.
+        }
+
+        // Create command map.
+        commandMap = new CommandMap(true);
+        // Generate handbooks.
         Tools.createGmHandbooks();
 
-        // Parse arguments.
-        boolean exitEarly = false;
-        for (String arg : args) {
-            switch (arg.toLowerCase()) {
-                case "-dumppacketids" -> {
-                    PacketOpcodesUtils.dumpPacketIds();
-                    exitEarly = true;
-                }
-                case "-version" -> {
-                    System.out.println("Grasscutter version: " + BuildConfig.VERSION + "-" + BuildConfig.GIT_HASH);
-                    exitEarly = true;
-                }
-                case "-debug" -> {
-                    // Set the logger to debug.
-                    log.setLevel(Level.DEBUG);
-                    log.debug("The logger is now running in debug mode.");
-
-                    // Change loggers to debug.
-                    ((Logger) LoggerFactory.getLogger("express"))
-                        .setLevel(Level.INFO);
-                    ((Logger) LoggerFactory.getLogger("org.quartz"))
-                        .setLevel(Level.INFO);
-                    ((Logger) LoggerFactory.getLogger("org.reflections"))
-                        .setLevel(Level.INFO);
-                    ((Logger) LoggerFactory.getLogger("org.eclipse.jetty"))
-                        .setLevel(Level.INFO);
-                    ((Logger) LoggerFactory.getLogger("org.mongodb.driver"))
-                        .setLevel(Level.INFO);
-                }
-                case "-debugall" -> {
-                    // Set the logger to debug.
-                    log.setLevel(Level.DEBUG);
-                    log.debug("The logger is now running in debug mode.");
-
-                    // Change loggers to debug.
-                    ((Logger) LoggerFactory.getLogger("express"))
-                        .setLevel(Level.DEBUG);
-                    ((Logger) LoggerFactory.getLogger("org.quartz"))
-                        .setLevel(Level.DEBUG);
-                    ((Logger) LoggerFactory.getLogger("org.reflections"))
-                        .setLevel(Level.DEBUG);
-                    ((Logger) LoggerFactory.getLogger("org.eclipse.jetty"))
-                        .setLevel(Level.DEBUG);
-                    ((Logger) LoggerFactory.getLogger("org.mongodb.driver"))
-                        .setLevel(Level.DEBUG);
-                }
-            }
-        }
-
-        // Exit early if an argument sets it.
-        if (exitEarly) System.exit(0);
-
         // Initialize server.
         Grasscutter.getLogger().info(translate("messages.status.starting"));
         Grasscutter.getLogger().info(translate("messages.status.game_version", GameConstants.VERSION));

src/main/java/emu/grasscutter/command/CommandMap.java

@@ -23,7 +23,7 @@ public final class CommandMap {
     }
 
     public static CommandMap getInstance() {
-        return Grasscutter.getGameServer().getCommandMap();
+        return Grasscutter.getCommandMap();
     }
 
     /**

src/main/java/emu/grasscutter/data/ResourceLoader.java

@@ -421,7 +421,7 @@ public class ResourceLoader {
             GameData.getMainQuestDataMap().put(mainQuest.getId(), mainQuest);
         }
 
-        try (Reader reader = new FileReader(new File(RESOURCE("QuestEncryptionKeys.json")))) {
+        try (Reader reader = new FileReader(RESOURCE("QuestEncryptionKeys.json"))) {
             List<QuestEncryptionKey> keys = Grasscutter.getGsonFactory().fromJson(
                 reader,
                 TypeToken.getParameterized(List.class, QuestEncryptionKey.class).getType());

src/main/java/emu/grasscutter/plugin/PluginManager.java

@@ -85,7 +85,6 @@ public final class PluginManager {
                     PluginConfig pluginConfig = Grasscutter.getGsonFactory().fromJson(fileReader, PluginConfig.class);
                     // Check if the plugin config is valid.
                     if (!pluginConfig.validate()) {
-                        Utils.logObject(pluginConfig);
                         Grasscutter.getLogger().warn("Plugin " + plugin.getName() + " has an invalid config file.");
                         return;
                     }
@@ -211,11 +210,7 @@ public final class PluginManager {
     public void disablePlugins() {
         this.plugins.forEach((name, plugin) -> {
             Grasscutter.getLogger().info("Disabling plugin: " + name);
-            try {
-                plugin.onDisable();
-            } catch (Throwable exception) {
-                Grasscutter.getLogger().error("Failed to disable plugin: " + name, exception);
-            }
+            this.disablePlugin(plugin);
         });
     }
 

src/main/java/emu/grasscutter/plugin/api/ServerHook.java

@@ -4,6 +4,7 @@ import emu.grasscutter.Grasscutter;
 import emu.grasscutter.auth.AuthenticationSystem;
 import emu.grasscutter.command.Command;
 import emu.grasscutter.command.CommandHandler;
+import emu.grasscutter.command.CommandMap;
 import emu.grasscutter.command.PermissionHandler;
 import emu.grasscutter.game.player.Player;
 import emu.grasscutter.server.game.GameServer;
@@ -72,7 +73,7 @@ public final class ServerHook {
         if(!clazz.isAnnotationPresent(Command.class))
             throw new IllegalArgumentException("Command handler must be annotated with @Command.");
         Command commandData = clazz.getAnnotation(Command.class);
-        this.gameServer.getCommandMap().registerCommand(commandData.label(), handler);
+        CommandMap.getInstance().registerCommand(commandData.label(), handler);
     }
 
     /**

src/main/java/emu/grasscutter/server/game/GameServer.java

@@ -72,7 +72,6 @@ public final class GameServer extends KcpServer {
 
     // Extra
     private final ServerTaskScheduler scheduler;
-    private final CommandMap commandMap;
     private final TaskMap taskMap;
 
     private ChatManagerHandler chatManager;
@@ -107,7 +106,6 @@ public final class GameServer extends KcpServer {
 
         // Extra
         this.scheduler = new ServerTaskScheduler();
-        this.commandMap = new CommandMap(true);
         this.taskMap = new TaskMap(true);
 
         // Create game systems

src/main/java/emu/grasscutter/server/http/documentation/HandbookRequestHandler.java

@@ -54,7 +54,7 @@ final class HandbookRequestHandler implements DocumentationHandler {
             sbs.add(new StringBuilder(""));
 
         // Commands table
-        new CommandMap(true).getHandlersAsList().forEach(cmd -> {
+        CommandMap.getInstance().getHandlersAsList().forEach(cmd -> {
             String label = cmd.getLabel();
             String descKey = cmd.getDescriptionKey();
             for (int langIdx = 0; langIdx < NUM_LANGUAGES; langIdx++)

src/main/java/emu/grasscutter/tools/Tools.java

@@ -48,7 +48,7 @@ public final class Tools {
                 .append("// Created " + now + "\n\n")
                 .append("// Commands\n"));
         // Commands
-        final List<CommandHandler> cmdList = new CommandMap(true).getHandlersAsList();
+        final List<CommandHandler> cmdList = CommandMap.getInstance().getHandlersAsList();
         final String padCmdLabel = "%" + cmdList.stream().map(CommandHandler::getLabel).map(String::length).max(Integer::compare).get().toString() + "s : ";
         for (CommandHandler cmd : cmdList) {
             final String label = padCmdLabel.formatted(cmd.getLabel());
@@ -65,7 +65,7 @@ public final class Tools {
             final Int2IntMap h = handbookNames[section];
             final String s = "\n\n// " + handbookSections[section] + "\n";
             handbookBuilders.forEach(b -> b.append(s));
-            final String padId = "%" + Integer.toString(Integer.toString(h.keySet().intStream().max().getAsInt()).length()) + "s : ";
+            final String padId = "%" + Integer.toString(h.keySet().intStream().max().getAsInt()).length() + "s : ";
             h.keySet().intStream().sorted().forEach(id -> {
                 final String sId = padId.formatted(id);
                 final TextStrings t = textMaps.get(h.get(id));
@@ -76,7 +76,7 @@ public final class Tools {
         // Scenes - no translations
         handbookBuilders.forEach(b -> b.append("\n\n// Scenes\n"));
         final var sceneDataMap = GameData.getSceneDataMap();
-        final String padSceneId = "%" + Integer.toString(Integer.toString(sceneDataMap.keySet().intStream().max().getAsInt()).length()) + "d : ";
+        final String padSceneId = "%" + Integer.toString(sceneDataMap.keySet().intStream().max().getAsInt()).length() + "d : ";
         sceneDataMap.keySet().intStream().sorted().forEach(id -> {
             final String sId = padSceneId.formatted(id);
             final String data = sceneDataMap.get(id).getScriptData();
@@ -85,7 +85,7 @@ public final class Tools {
         // Quests
         handbookBuilders.forEach(b -> b.append("\n\n// Quests\n"));
         final var questDataMap = GameData.getQuestDataMap();
-        final String padQuestId = "%" + Integer.toString(Integer.toString(questDataMap.keySet().intStream().max().getAsInt()).length()) + "d : ";
+        final String padQuestId = "%" + Integer.toString(questDataMap.keySet().intStream().max().getAsInt()).length() + "d : ";
         questDataMap.keySet().intStream().sorted().forEach(id -> {
             final String sId = padQuestId.formatted(id);
             final QuestData data = questDataMap.get(id);
@@ -206,7 +206,7 @@ public final class Tools {
         try (PrintWriter writer = new PrintWriter(new OutputStreamWriter(new FileOutputStream(location), StandardCharsets.UTF_8), false)) {
             // if the user made choices for language, I assume it's okay to assign his/her selected language to "en-us"
             // since it's the fallback language and there will be no difference in the gacha record page.
-            // The enduser can still modify the `gacha/mappings.js` directly to enable multilingual for the gacha record system.
+            // The end-user can still modify the `gacha/mappings.js` directly to enable multilingual for the gacha record system.
             writer.println(sb);
             Grasscutter.getLogger().info("Mappings generated to " + location + " !");
         }
@@ -220,6 +220,7 @@ public final class Tools {
         } return availableLangList;
     }
 
+    @Deprecated(forRemoval = true, since = "1.2.3")
     public static String getLanguageOption() {
         List<String> availableLangList = getAvailableLanguage();
 
@@ -248,17 +249,13 @@ public final class Tools {
             stagedMessage.append(groupedLangList).append("\n");
         }
 
-        stagedMessage.append("\nYour choice:[EN] ");
+        stagedMessage.append("\nYour choice: [EN] ");
 
         input = Grasscutter.getConsole().readLine(stagedMessage.toString());
         if (availableLangList.contains(input.toLowerCase())) {
             return input.toUpperCase();
         }
-        Grasscutter.getLogger().info("Invalid option. Will use EN(English) as fallback");
 
-        return "EN";
+        Grasscutter.getLogger().info("Invalid option. Will use EN (English) as fallback."); return "EN";
     }
 }
-
-final class ToolsWithLanguageOption {
-}

src/main/java/emu/grasscutter/utils/StartupArguments.java

@@ -0,0 +1,99 @@
+package emu.grasscutter.utils;
+
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.Logger;
+import emu.grasscutter.BuildConfig;
+import emu.grasscutter.Grasscutter;
+import emu.grasscutter.net.packet.PacketOpcodesUtils;
+import org.slf4j.LoggerFactory;
+
+import java.util.Map;
+import java.util.function.Function;
+
+/**
+ * A parser for start-up arguments.
+ */
+public final class StartupArguments {
+    private StartupArguments() {
+        // This class is not meant to be instantiated.
+    }
+
+    /* A map of parameter -> argument handler. */
+    private static final Map<String, Function<String, Boolean>> argumentHandlers = Map.of(
+        "-dumppacketids", parameter -> {
+            PacketOpcodesUtils.dumpPacketIds(); return true;
+        },
+        "-version", StartupArguments::printVersion,
+        "-debug", StartupArguments::enableDebug,
+        "-lang", parameter -> {
+            Grasscutter.setPreferredLanguage(parameter); return false;
+        },
+
+        // Aliases.
+        "-v", StartupArguments::printVersion,
+        "-debugall", parameter -> {
+            StartupArguments.enableDebug("all"); return false;
+        }
+    );
+
+    /**
+     * Parses the provided start-up arguments.
+     * @param args The application start-up arguments.
+     * @return If the application should exit.
+     */
+    public static boolean parse(String[] args) {
+        boolean exitEarly = false;
+
+        // Parse the arguments.
+        for(var input : args) {
+            var containsParameter = input.contains("=");
+
+            var argument = containsParameter ? input.split("=")[0] : input;
+            var handler = argumentHandlers.get(argument.toLowerCase());
+
+            if (handler != null) {
+                exitEarly |= handler.apply(containsParameter ? input.split("=")[1] : null);
+            }
+        }
+
+        return exitEarly;
+    }
+
+    /**
+     * Prints the server version.
+     * @param parameter Additional parameters.
+     * @return True to exit early.
+     */
+    private static boolean printVersion(String parameter) {
+        System.out.println("Grasscutter version: " + BuildConfig.VERSION + "-" + BuildConfig.GIT_HASH); return true;
+    }
+
+    /**
+     * Enables debug logging.
+     * @param parameter Additional parameters.
+     * @return False to continue execution.
+     */
+    private static boolean enableDebug(String parameter) {
+        // Get the level by parameter.
+        var loggerLevel = parameter != null && parameter.equals("all")
+            ? Level.DEBUG : Level.INFO;
+
+        // Set the logger to debug.
+        Grasscutter.getLogger().setLevel(Level.DEBUG);
+        Grasscutter.getLogger().debug("The logger is now running in debug mode.");
+
+        // Change loggers to debug.
+        ((Logger) LoggerFactory.getLogger("express"))
+            .setLevel(loggerLevel);
+        ((Logger) LoggerFactory.getLogger("org.quartz"))
+            .setLevel(loggerLevel);
+        ((Logger) LoggerFactory.getLogger("org.reflections"))
+            .setLevel(loggerLevel);
+        ((Logger) LoggerFactory.getLogger("org.eclipse.jetty"))
+            .setLevel(loggerLevel);
+        ((Logger) LoggerFactory.getLogger("org.mongodb.driver"))
+            .setLevel(loggerLevel);
+
+        return false;
+    }
+}