Initial and done prolly

lib/pages/login/login_controller.dart

@@ -0,0 +1,128 @@
+import 'package:flutter/material.dart';
+import 'package:get/get.dart';
+import 'package:groceries_manager/db/database.dart';
+import 'package:groceries_manager/services/db_service.dart';
+import 'package:groceries_manager/services/toaster_service.dart';
+
+enum LoginState {
+  idle,
+  loading,
+}
+
+class LoginController extends GetxController {
+  final loginController = TextEditingController();
+  final passwordController = TextEditingController();
+
+  final anyUserExists = false.obs;
+
+  final loginState = LoginState.idle.obs;
+
+  @override
+  void onInit() {
+    super.onInit();
+
+    init();
+  }
+
+  Future<void> init() async {
+    loginState.value = LoginState.loading;
+
+    anyUserExists.value = await DBService.to.db.anyUserExists();
+
+    loginState.value = LoginState.idle;
+  }
+
+  @override
+  void onClose() {
+    loginController.dispose();
+    passwordController.dispose();
+    super.onClose();
+  }
+
+  String sanitize(String value) {
+    return value.replaceAll(RegExp(r'[^а-яА-Яa-zA-Z0-9]'), '');
+  }
+
+  Future<void> register() async {
+    final login = loginController.text;
+    final password = passwordController.text;
+
+    if (login.isEmpty || password.isEmpty) {
+      ToasterService.to.error(
+        title: "Ошибка",
+        message: "Логин и пароль не могут быть пустыми",
+      );
+      return;
+    }
+
+    loginState.value = LoginState.loading;
+
+    final UserData? user;
+    try {
+      user = await DBService.to.db.addUser(
+        login: login,
+        password: password,
+      );
+    } catch (e) {
+      ToasterService.to.error(
+        title: "Ошибка",
+        message: "Пользователь с таким логином уже существует",
+      );
+      return;
+    }
+
+    loginState.value = LoginState.idle;
+
+    if (user == null) {
+      ToasterService.to.error(
+        title: "Ошибка",
+        message: "Пользователь с таким логином уже существует",
+      );
+      return;
+    }
+
+    ToasterService.to.success(
+      title: "Успех",
+      message: "Пользователь успешно зарегистрирован",
+    );
+
+    Get.offAllNamed("/", arguments: user);
+  }
+
+  Future<void> login() async {
+    final login = loginController.text;
+    final password = passwordController.text;
+
+    if (login.isEmpty || password.isEmpty) {
+      ToasterService.to.error(
+        title: "Ошибка",
+        message: "Логин и пароль не могут быть пустыми!",
+      );
+      return;
+    }
+
+    loginState.value = LoginState.loading;
+
+    final user = await DBService.to.db.findUser(
+      login: login,
+      password: password,
+    );
+
+    loginState.value = LoginState.idle;
+
+    if (user == null) {
+      ToasterService.to.error(
+        title: "Ошибка",
+        message: "Пользователь с такой связкой данных не существует!",
+      );
+      return;
+    }
+
+    ToasterService.to.success(
+      title: "Успех",
+      message: "Привет, ${user.login}!",
+    );
+
+    Get.offAllNamed("/", arguments: user);
+  }
+}