Basic implementation of first login handshake

lib/server/main.dart

@@ -0,0 +1,61 @@
+import 'dart:io';
+
+import 'package:bugvault/server/packets.dart';
+import 'package:bugvault/users/User.dart';
+import 'package:libac_dart/nbt/NbtIo.dart';
+import 'package:libac_dart/nbt/NbtUtils.dart';
+import 'package:libac_dart/nbt/impl/CompoundTag.dart';
+import 'package:libac_dart/nbt/impl/ListTag.dart';
+import 'package:libac_dart/packets/packets.dart';
+
+class BugVaultServer {
+  static int g_iPortNumber = 8372;
+  static bool g_bAllowAnonymousLogin = true;
+  static List<DBUser> UserDB = List.empty();
+
+  static Future<void> InstantiateSettings(CompoundTag ct) async {
+    g_iPortNumber = ct.get("port")?.asInt() ?? 8372;
+    if (ct.containsKey("anonymous"))
+      g_bAllowAnonymousLogin = NbtUtils.readBoolean(ct, "anonymous");
+
+    await _loadUserDB();
+  }
+
+  static Future<void> _loadUserDB() async {
+    File users = File("users.dat");
+    if (await users.exists()) {
+      CompoundTag ct = await NbtIo.read("users.dat") as CompoundTag;
+      ListTag userList = ct.get("users")! as ListTag;
+      for (var tag in userList.value) {
+        CompoundTag userEntry = tag.asCompoundTag();
+        UserDB.add(DBUser.load(serialized: userEntry));
+      }
+    }
+  }
+
+  static Future<void> RegisterPacketHandlers() async {
+    PacketRegistry registry = PacketRegistry();
+    BVSPacketImpl.Register(registry);
+  }
+
+  static DBUser? TryGetUser(String name) {
+    for (var entry in UserDB) {
+      if (entry.sName == name) {
+        return entry;
+      }
+    }
+
+    return null;
+  }
+}
+
+class BVSPacketImpl {
+  static Future<void> Register(PacketRegistry registry) async {
+    registry.register(C2SPacketLogin(), () {
+      return C2SPacketLogin();
+    });
+    registry.register(S2CLoginReply(), () {
+      return S2CLoginReply();
+    });
+  }
+}