Refactor codebase resolving warnings and remove self-package imports

lib/view/login/login.dart

@@ -0,0 +1,120 @@
+
+import 'dart:developer';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_login/flutter_login.dart';
+import 'package:provider/provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+import '../../api/apiError.dart';
+import '../../api/webuntis/queries/authenticate/authenticateParams.dart';
+import '../../api/webuntis/queries/authenticate/authenticate.dart';
+import '../../api/webuntis/webuntisError.dart';
+import '../../model/accountModel.dart';
+
+class Login extends StatefulWidget {
+  const Login({Key? key}) : super(key: key);
+
+  @override
+  State<Login> createState() => _LoginState();
+}
+
+class _LoginState extends State<Login> {
+  bool displayDisclaimerText = true;
+
+  String? _checkInput(value){
+    return (value ?? "").length == 0 ? "Eingabe erforderlich" : null;
+  }
+
+  Future<String?> _login(LoginData data) async {
+    SharedPreferences preferences = await SharedPreferences.getInstance();
+    preferences.setBool("loggedIn", false);
+
+    try {
+      await Authenticate(
+        AuthenticateParams(
+          user: data.name,
+          password: data.password,
+        )
+      ).run().then((value) => {
+        log(value.sessionId)
+      });
+    } on WebuntisError catch(e) {
+      return e.toString();
+    } on ApiError catch(e) {
+      return e.toString();
+    }
+
+    setState(() {
+      displayDisclaimerText = false;
+    });
+
+    preferences.setBool("loggedIn", true);
+    preferences.setString("username", data.name);
+    preferences.setString("password", data.password);
+
+    return null;
+  }
+
+  Future<String> _resetPassword(String name) {
+    return Future.delayed(Duration.zero).then((_) {
+      return "Diese Funktion steht nicht zur Verfügung!";
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return FlutterLogin(
+      logo: Image.asset("assets/logo/icon.png").image,
+
+      userValidator: _checkInput,
+      passwordValidator: _checkInput,
+      onSubmitAnimationCompleted: () => Provider.of<AccountModel>(context, listen: false).login(),
+
+      onLogin: _login,
+      onSignup: null,
+
+      onRecoverPassword: _resetPassword,
+      hideForgotPasswordButton: true,
+
+      theme: LoginTheme(
+        primaryColor: Theme.of(context).primaryColor,
+        accentColor: Colors.white,
+        errorColor: Theme.of(context).primaryColor,
+        footerBottomPadding: 10,
+        textFieldStyle: const TextStyle(
+          fontWeight: FontWeight.w500
+        ),
+        cardTheme: const CardTheme(
+          elevation: 10,
+        ),
+      ),
+
+      messages: LoginMessages(
+        loginButton: "Anmelden",
+        userHint: "Nutzername",
+        passwordHint: "Passwort",
+      ),
+
+      disableCustomPageTransformer: true,
+
+      headerWidget: Padding(
+        padding: const EdgeInsets.only(bottom: 30),
+        child: Center(
+          child: Visibility(
+            visible: displayDisclaimerText,
+            child: const Text(
+            "Dies ist ein Inoffizieller Nextcloud & Webuntis Client und wird nicht vom Marianum selbst betrieben.\nKeinerlei Gewähr für Vollständigkeit, Richtigkeit und Aktualität!",
+            textAlign: TextAlign.center,
+            ),
+          ),
+        ),
+      ),
+
+      footer: "Marianum Fulda - Die persönliche Schule",
+      title: "Marianum Fulda",
+
+      userType: LoginUserType.name,
+    );
+  }
+}