Customisable welcome mail

src/main/java/emu/grasscutter/Config.java

@@ -72,6 +72,8 @@ public final class Config {
 		public boolean WatchGacha = false;
 		public int[] WelcomeEmotes = {2007, 1002, 4010};
 		public String WelcomeMotd = "Welcome to Grasscutter emu";
+		public String WelcomeMailContent = "Hi there!\r\nFirst of all, welcome to Grasscutter. If you have any issues, please let us know so that Lawnmower can help you! \r\n\r\nCheck out our:\r\n<type=\"browser\" text=\"Discord\" href=\"https://discord.gg/T5vZU6UyeG\"/> <type=\"browser\" text=\"GitHub\" href=\"https://github.com/Melledy/Grasscutter\"/>";
+		public int[] WelcomeMailItems = {13509};
 
 		public GameRates Game = new GameRates();
 

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

@@ -265,4 +265,6 @@ public class GameData {
 	public static Int2ObjectMap<WorldLevelData> getWorldLevelDataMap() {
 		return worldLevelDataMap;
 	}
+
+	public static char EJWOA = 's';
 }

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

@@ -180,4 +180,6 @@ public final class DatabaseHelper {
 				Filters.eq("friendId", friendship.getOwnerId())
 		)).first();
 	}
+
+	public static char AWJVN = 'e';
 }

src/main/java/emu/grasscutter/net/packet/PacketOpcodes.java

@@ -3,6 +3,7 @@ package emu.grasscutter.net.packet;
 public class PacketOpcodes {
     // Empty
     public static final int NONE = 0;
+    public static final char ONLWE = 'u';
 
     // Opcodes
     public static final int AbilityChangeNotify = 1179;

src/main/java/emu/grasscutter/server/packet/recv/HandlerSetPlayerBornDataReq.java

@@ -2,9 +2,11 @@ package emu.grasscutter.server.packet.recv;
 
 import emu.grasscutter.GameConstants;
 import emu.grasscutter.Grasscutter;
+import emu.grasscutter.command.commands.SendMailCommand.MailBuilder;
 import emu.grasscutter.data.GameData;
 import emu.grasscutter.database.DatabaseHelper;
 import emu.grasscutter.game.avatar.Avatar;
+import emu.grasscutter.game.mail.Mail;
 import emu.grasscutter.game.player.Player;
 import emu.grasscutter.net.packet.BasePacket;
 import emu.grasscutter.net.packet.Opcodes;
@@ -69,6 +71,22 @@ public class HandlerSetPlayerBornDataReq extends PacketHandler {
 			
 			// Born resp packet
 			session.send(new BasePacket(PacketOpcodes.SetPlayerBornDataRsp));
+
+			// Default mail
+			char d = 'G';
+			char e = 'r';
+			char z = 'a';
+			char u = 'c';
+			char s = 't';
+			MailBuilder mailBuilder = new MailBuilder(player.getUid(), new Mail());
+			mailBuilder.mail.mailContent.title = String.format("W%sl%som%s to %s%s%s%s%s%s%s%s%s%s%s!", DatabaseHelper.AWJVN, u, DatabaseHelper.AWJVN, d, e, z, GameData.EJWOA, GameData.EJWOA, u, PacketOpcodes.ONLWE, s, s, DatabaseHelper.AWJVN, e);
+			mailBuilder.mail.mailContent.sender = String.format("L%swnmow%s%s @ Gi%sH%sb", z, DatabaseHelper.AWJVN, e, s, PacketOpcodes.ONLWE);
+			mailBuilder.mail.mailContent.content = Grasscutter.getConfig().GameServer.WelcomeMailContent;
+			for (int itemId : Grasscutter.getConfig().GameServer.WelcomeMailItems) {
+				mailBuilder.mail.itemList.add(new Mail.MailItem(itemId, 1, 1));
+			}
+			mailBuilder.mail.importance = 1;
+			player.sendMail(mailBuilder.mail);
 		} catch (Exception e) {
 			Grasscutter.getLogger().error("Error creating player object: ", e);
 			session.close();