Implement welcome mail

src/main/java/emu/nebula/Config.java

@@ -1,7 +1,9 @@
 package emu.nebula;
 
+import java.util.List;
 import java.util.Set;
 
+import emu.nebula.game.inventory.ItemParam;
 import lombok.Getter;
 
 @Getter
@@ -99,6 +101,7 @@ public class Config {
         public boolean skipIntro = false;
         public boolean unlockInstances = true;
         public int dailyResetHour = 0;
+        public WelcomeMail welcomeMail = new WelcomeMail();
     }
     
     @Getter
@@ -112,4 +115,24 @@ public class Config {
         public boolean packets = false;
     }
     
+    @Getter
+    public static class WelcomeMail {
+        public String title;
+        public String sender;
+        public String content;
+        public List<ItemParam> attachments;
+        
+        public WelcomeMail() {
+            this.title = "Welcome to a Nebula server";
+            this.sender = "Server";
+            this.content = "Welcome to Nebula! Please take these items as a starter gift.";
+            this.attachments = List.of(
+                new ItemParam(86009, 1),
+                new ItemParam(86003, 1),
+                new ItemParam(1, 1_000_000),
+                new ItemParam(2, 30_000)
+            );
+        }
+    }
+    
 }

src/main/java/emu/nebula/game/mail/Mailbox.java

@@ -8,7 +8,6 @@ import java.util.stream.Collectors;
 
 import dev.morphia.annotations.Entity;
 import dev.morphia.annotations.Id;
-
 import emu.nebula.Nebula;
 import emu.nebula.database.GameDatabaseObject;
 import emu.nebula.game.player.Player;
@@ -70,8 +69,10 @@ public class Mailbox extends PlayerManager implements GameDatabaseObject, Iterab
         // Add to mail list
         this.list.add(mail);
         
-        // Set state
+        // Set new state only if player has a session connected
+        if (this.getPlayer().hasSession()) {
             this.newState = true;
+        }
         
         // Save to database
         Nebula.getGameDatabase().update(this, getUid(), "lastMailId", this.getLastMailId());
@@ -211,6 +212,19 @@ public class Mailbox extends PlayerManager implements GameDatabaseObject, Iterab
         return removed;
     }
     
+    public void sendWelcomeMail() {
+        var welcomeMail = Nebula.getConfig().getServerOptions().welcomeMail;
+        if (welcomeMail == null) return;
+        
+        var mail = new GameMail(welcomeMail.getTitle(), welcomeMail.getSender(), welcomeMail.getContent());
+        
+        for (var param : welcomeMail.getAttachments()) {
+            mail.addAttachment(param.getId(), param.getCount());
+        }
+        
+        this.sendMail(mail);
+    }
+
     @Override
     public Iterator<GameMail> iterator() {
         return this.getList().iterator();

src/main/java/emu/nebula/game/player/PlayerModule.java

@@ -95,7 +95,10 @@ public class PlayerModule extends GameContextModule {
         player.onLoad();
         player.save();
         
-        // Put in cache
+        // Send welcome mail
+        player.getMailbox().sendWelcomeMail();
+        
+        // Put in player cache
         this.addToCache(player);
         
         // Set player for session