WIP high education graduation calculator

lib/view/pages/more/highEduGraduationCalculator/highEduGraduationCalculator.dart

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+import 'package:flutter/material.dart';
+import 'package:marianum_mobile/view/pages/more/highEduGraduationCalculator/models/subject.dart';
+import 'package:marianum_mobile/view/pages/more/highEduGraduationCalculator/selectLkView.dart';
+
+class HighEduGraduationCalculator extends StatefulWidget {
+  const HighEduGraduationCalculator({super.key});
+
+  @override
+  State<HighEduGraduationCalculator> createState() => _HighEduGraduationCalculatorState();
+}
+
+class _HighEduGraduationCalculatorState extends State<HighEduGraduationCalculator> {
+  SubjectCollection allSubjects = SubjectCollection([
+    Subject(displayName: "Mathe", lkApplicable: true),
+    Subject(displayName: "Physik", lkApplicable: true),
+    Subject(displayName: "Chemie", lkApplicable: true),
+    Subject(displayName: "Biologie", lkApplicable: true),
+    Subject(displayName: "Englisch", lkApplicable: true),
+    Subject(displayName: "Latein", lkApplicable: true),
+  ]);
+
+  SubjectCollection? lkSubjects;
+
+  int currentStep = 0;
+  List<Step> steps() => [
+    Step(title: const Text("Willkommen"), content: Text("test")),
+    Step(title: const Text("Leistungskurse wählen"), content: lkSubjectsStep()),
+    const Step(title: Text("Grundkurse wählen"), content: Text("Test")),
+    const Step(title: Text("Prüfungsfächer wählen"), content: Text("Test")),
+    const Step(title: Text("Ergebnis auswerten"), content: Text("Test")),
+  ];
+
+  Widget lkSubjectsStep() {
+    return Column(
+      children: [
+        Text(lkSubjects?.subjects.where((e) => e.isLk()).map((e) => e.displayName).join(", ")  ?? "Keine Auswahl"),
+        TextButton(
+          onPressed: () {
+            showDialog(context: context, builder: (context) => SelectLkView(all: allSubjects, update: () => setState(() => { })));
+          },
+          child: const Text("Ändern"),
+        ),
+      ],
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("Abitur Notenrechner"),
+      ),
+      body: Stepper(
+        type: StepperType.vertical,
+        steps: steps(),
+        currentStep: currentStep,
+        onStepContinue: () {
+          setState(() {
+            currentStep++;
+          });
+        },
+        controlsBuilder: (context, details) {
+          return Row(
+            children: [
+              TextButton(
+              onPressed: () => details.onStepContinue,
+                child: const Text("Weiter"),
+              )
+            ],
+          );
+        },
+      )
+    );
+  }
+}

lib/view/pages/more/highEduGraduationCalculator/models/subject.dart

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+import 'package:flutter/material.dart';
+import 'package:marianum_mobile/widget/centeredLeading.dart';
+
+enum SubjectState {
+  none,
+  isLk,
+  isGk,
+}
+
+class HighEduGraduationConstants {
+  static const int maxLks = 2;
+  static const int maxGks = 9;
+}
+
+class SubjectCollection {
+  List<Subject> subjects;
+
+  SubjectCollection(this.subjects);
+}
+
+class Subject {
+  String displayName;
+  bool lkApplicable;
+
+  SubjectState _subjectState = SubjectState.none;
+
+  bool isLk() => _subjectState == SubjectState.isLk;
+  bool isGk() => _subjectState == SubjectState.isGk;
+  bool canLk(List<Subject> other) => lkApplicable && other.where((s) => s.isLk()).length < HighEduGraduationConstants.maxLks;
+  bool canGk(List<Subject> other) => !isLk() && other.where((s) => s.isGk()).length < HighEduGraduationConstants.maxGks;
+
+  set unsafeSubjectSet(SubjectState newState) => _subjectState = newState;
+  set unsafeLkToggle(bool isLk) {
+    _subjectState = isLk ? SubjectState.isLk : SubjectState.none;
+  }
+
+  ListTile get asTile => ListTile(
+    leading: const CenteredLeading(Icon(Icons.subject_outlined)),
+    title: Text(displayName),
+    trailing: Checkbox(
+      value: isGk(),
+      onChanged: (e) => {},
+    ),
+  );
+
+
+  Subject({required this.displayName, required this.lkApplicable});
+}

lib/view/pages/more/highEduGraduationCalculator/selectLkView.dart

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+import 'package:flutter/material.dart';
+import 'package:marianum_mobile/view/pages/more/highEduGraduationCalculator/models/subject.dart';
+import 'package:marianum_mobile/widget/centeredLeading.dart';
+
+class SelectLkView extends StatefulWidget {
+  final SubjectCollection all;
+  final void Function() update;
+  const SelectLkView({required this.all, required this.update, super.key});
+
+  @override
+  State<SelectLkView> createState() => _SelectLkViewState();
+}
+
+class _SelectLkViewState extends State<SelectLkView> {
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      title: const Text("Leistungskurse"),
+      content: Column(
+        mainAxisSize: MainAxisSize.min,
+        children: widget.all.subjects.map((e) {
+          return ListTile(
+            leading: const CenteredLeading(Icon(Icons.subject_outlined)),
+            title: Text(e.displayName),
+            trailing: Checkbox(
+              value: e.isLk(),
+              onChanged: e.isLk() || e.canLk(widget.all.subjects) ? (value) {
+                setState(() {
+                  e.unsafeLkToggle = value!;
+                });
+              } : null,
+            ),
+          );
+        }).toList(),
+      ),
+      actions: [
+        TextButton(
+          onPressed: () {
+            widget.update();
+            Navigator.of(context).pop();
+          },
+          child: const Text("Fertig"),
+        )
+      ],
+    );
+  }
+}