src/main/java/emu/grasscutter/auth/DefaultAuthenticators.java

@@ -36,7 +36,7 @@ public final class DefaultAuthenticators {
                 // Check if account exists.
                 if(account == null && ACCOUNT.autoCreate) {
                     // This account has been created AUTOMATICALLY. There will be no permissions added.
-                    account = DatabaseHelper.createAccountWithUid(requestData.account, 0);
+                    account = DatabaseHelper.createAccountWithId(requestData.account, 0);
 
                     // Check if the account was created successfully.
                     if(account == null) {

src/main/java/emu/grasscutter/command/commands/AccountCommand.java

@@ -44,7 +44,7 @@ public final class AccountCommand implements CommandHandler {
                     }
                 }
 
-                emu.grasscutter.game.Account account = DatabaseHelper.createAccountWithUid(username, uid);
+                emu.grasscutter.game.Account account = DatabaseHelper.createAccountWithId(username, uid);
                 if (account == null) {
                     CommandHandler.sendMessage(null, translate(sender, "commands.account.exists"));
                     return;

src/main/java/emu/grasscutter/command/commands/SendMessageCommand.java

@@ -15,7 +15,7 @@ public final class SendMessageCommand implements CommandHandler {
     @Override
     public void execute(Player sender, Player targetPlayer, List<String> args) {
         if (args.size() == 0) {
-            CommandHandler.sendMessage(sender, translate(sender, "commands.sendMessage.usage"));
+            CommandHandler.sendMessage(null, translate(sender, "commands.sendMessage.usage"));
             return;
         }
 

src/main/java/emu/grasscutter/database/DatabaseHelper.java

@@ -22,28 +22,32 @@ import static com.mongodb.client.model.Filters.eq;
 
 public final class DatabaseHelper {
 	public static Account createAccount(String username) {
-		return createAccountWithUid(username, 0);
+		return createAccountWithId(username, 0);
 	}
 
-	public static Account createAccountWithUid(String username, int reservedUid) {
+	public static Account createAccountWithId(String username, int reservedId) {
 		// Unique names only
-		if (DatabaseHelper.checkIfAccountExists(username)) {
+		Account exists = DatabaseHelper.getAccountByName(username);
+		if (exists != null) {
 			return null;
 		}
 
 		// Make sure there are no id collisions
-		if (reservedUid > 0) {
+		if (reservedId > 0) {
 			// Cannot make account with the same uid as the server console
-			if (reservedUid == GameConstants.SERVER_CONSOLE_UID) {
+			if (reservedId == GameConstants.SERVER_CONSOLE_UID) {
 				return null;
 			}
 
-			if (DatabaseHelper.checkIfAccountExists(reservedUid)) {
+			// Make sure not other accounts has that id as its reservedPlayerId
+			exists = DatabaseHelper.getAccountByPlayerId(reservedId);
+			if (exists != null) {
 				return null;
 			}
 
 			// Make sure no existing player already has this id.
-			if (DatabaseHelper.checkIfPlayerExists(reservedUid)) {
+			Player existsPlayer = DatabaseHelper.getPlayerByUid(reservedId);
+			if (existsPlayer != null) {
 				return null;
 			}
 		}
@@ -53,8 +57,8 @@ public final class DatabaseHelper {
 		account.setUsername(username);
 		account.setId(Integer.toString(DatabaseManager.getNextId(account)));
 
-		if (reservedUid > 0) {
+		if (reservedId > 0) {
-			account.setReservedPlayerUid(reservedUid);
+			account.setReservedPlayerUid(reservedId);
 		}
 
 		DatabaseHelper.saveAccount(account);
@@ -104,14 +108,6 @@ public final class DatabaseHelper {
 		return DatabaseManager.getGameDatastore().find(Account.class).filter(Filters.eq("reservedPlayerId", playerId)).first();
 	}
 
-	public static boolean checkIfAccountExists(String name) {
-		return DatabaseManager.getGameDatastore().find(Account.class).filter(Filters.eq("username", name)).count() > 0;
-	}
-	
-	public static boolean checkIfAccountExists(int reservedUid) {
-		return DatabaseManager.getGameDatastore().find(Account.class).filter(Filters.eq("reservedPlayerId", reservedUid)).count() > 0;
-	}
-
 	public static void deleteAccount(Account target) {
 		// To delete an account, we need to also delete all the other documents in the database that reference the account.
 		// This should optimally be wrapped inside a transaction, to make sure an error thrown mid-way does not leave the
@@ -156,21 +152,21 @@ public final class DatabaseHelper {
 		return DatabaseManager.getGameDatastore().find(Player.class).filter(Filters.eq("accountId", account.getId())).first();
 	}
 	
-	public static boolean checkIfPlayerExists(int uid) {
+	public static boolean checkPlayerExists(int uid) {
 		return DatabaseManager.getGameDatastore().find(Player.class).filter(Filters.eq("_id", uid)).count() > 0;
 	}
 
 	public static synchronized Player generatePlayerUid(Player character, int reservedId) {
 		// Check if reserved id
 		int id;
-		if (reservedId > 0 && !checkIfPlayerExists(reservedId)) {
+		if (reservedId > 0 && !checkPlayerExists(reservedId)) {
 			id = reservedId;
 			character.setUid(id);
 		} else {
 			do {
 				id = DatabaseManager.getNextId(character);
 			}
-			while (checkIfPlayerExists(id));
+			while (checkPlayerExists(id));
 			character.setUid(id);
 		}
 		// Save to database
@@ -181,13 +177,13 @@ public final class DatabaseHelper {
 	public static synchronized int getNextPlayerId(int reservedId) {
 		// Check if reserved id
 		int id;
-		if (reservedId > 0 && !checkIfPlayerExists(reservedId)) {
+		if (reservedId > 0 && !checkPlayerExists(reservedId)) {
 			id = reservedId;
 		} else {
 			do {
 				id = DatabaseManager.getNextId(Player.class);
 			}
-			while (checkIfPlayerExists(id));
+			while (checkPlayerExists(id));
 		}
 		return id;
 	}

src/main/resources/languages/en-US.json

@@ -136,7 +136,7 @@
     "coop": {
       "usage": "Usage: coop [host UID]",
       "success": "Summoned %s to %s's world.",
-      "description": "Forces someone to join the world of others. If no one is targeted, it sends you into co-op mode anyway."
+      "description": "Forces someone to join the world of others"
     },
     "enter_dungeon": {
       "usage": "Usage: enterdungeon <dungeonID>",