Push new session handling

lib/pages/OpenSim.dart

@@ -3,7 +3,13 @@ import 'dart:convert';
 import 'package:flutter/material.dart';
 import 'package:footer/footer.dart';
 import 'package:footer/footer_view.dart';
+import 'package:libac_flutter/nbt/NbtIo.dart';
+import 'package:libac_flutter/nbt/NbtUtils.dart';
+import 'package:libac_flutter/nbt/impl/CompoundTag.dart';
+import 'package:libac_flutter/nbt/impl/IntTag.dart';
+import 'package:libac_flutter/nbt/impl/StringTag.dart';
 import 'package:libac_flutter/utils/uuid/UUID.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 import 'package:zontreck/Constants.dart';
 import 'package:zontreck/Packets.dart';
 import 'package:zontreck/Settings.dart';
@@ -15,6 +21,7 @@ class User {
   int createdAt;
   String userTitle;
   bool active;
+  UUID loginToken;
 
   User(
       {required this.ID,
@@ -22,7 +29,8 @@ class User {
       required this.LastName,
       required this.createdAt,
       required this.userTitle,
-      required this.active});
+      required this.active,
+      required this.loginToken});
 
   static User parseJson(Map<String, dynamic> map) {
     return User(
@@ -31,7 +39,8 @@ class User {
         LastName: map['last'] as String,
         createdAt: map['rez'] as int,
         userTitle: map['title'] as String,
-        active: map['active'] as bool);
+        active: map['active'] as bool,
+        loginToken: UUID.parse(map['token'] as String));
   }
 
   String encode() {
@@ -41,9 +50,34 @@ class User {
       "last": LastName,
       "rez": createdAt,
       "title": userTitle,
-      "active": active
+      "active": active,
+      "token": loginToken
     });
   }
+
+  CompoundTag save() {
+    CompoundTag tag = CompoundTag();
+    NbtUtils.writeUUID(tag, "id", ID);
+    tag.put("first", StringTag.valueOf(FirstName));
+    tag.put("last", StringTag.valueOf(LastName));
+    tag.put("rez", IntTag.valueOf(createdAt));
+    tag.put("title", StringTag.valueOf(userTitle));
+    NbtUtils.writeBoolean(tag, "active", active);
+    NbtUtils.writeUUID(tag, "token", loginToken);
+
+    return tag;
+  }
+
+  static User load(CompoundTag tag) {
+    return User(
+        ID: NbtUtils.readUUID(tag, "id"),
+        FirstName: tag.get("first")!.asString(),
+        LastName: tag.get("last")!.asString(),
+        createdAt: tag.get("rez")!.asInt(),
+        userTitle: tag.get("title")!.asString(),
+        active: NbtUtils.readBoolean(tag, "active"),
+        loginToken: NbtUtils.readUUID(tag, "token"));
+  }
 }
 
 class OpenSimPage extends StatefulWidget {
@@ -77,6 +111,29 @@ class OpenSimPageState extends State<OpenSimPage> {
       settings.OpenSimSetupCompleted = false;
     }
 
+    if (!settings.loggedIn) {
+      SharedPreferences prefs = await SharedPreferences.getInstance();
+      if (prefs.containsKey("settings")) {
+        String encoded = prefs.getString("settings")!;
+        CompoundTag tag = NbtIo.readBase64String(encoded) as CompoundTag;
+        if (tag.contains("user"))
+          settings.currentUser = User.load(tag.get("user") as CompoundTag);
+
+        // Validate current session
+        var reply = await settings.sendPacketToEndpoint(
+                APIEndpoint.ValidateSession,
+                C2SSessionCheckPacket(
+                    sessionToken: settings.currentUser!.loginToken))
+            as S2CSessionCheckPacket;
+        if (reply.valid) {
+          // We're good to continue loading this user
+        } else {
+          settings.currentUser = null;
+          prefs.clear();
+        }
+      }
+    }
+
     var pong = await settings.sendPacketToEndpoint(
         APIEndpoint.Ping, NullPacket()) as S2CPongPacket;
 
@@ -147,6 +204,11 @@ class OpenSimPageState extends State<OpenSimPage> {
                                                       APIEndpoint.Logout,
                                                       NullPacket());
 
+                                              SharedPreferences prefs =
+                                                  await SharedPreferences
+                                                      .getInstance();
+                                              prefs.clear();
+
                                               didChangeDependencies();
                                             },
                                             child: Text("LOGOUT"))