This commit is contained in:
Kazimierz Ciołek
252
lib/data/services/grading_service.dart
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252
lib/data/services/grading_service.dart
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import 'dart:convert';
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import 'dart:io';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart' show Color;
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import 'package:path/path.dart' as p;
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import 'package:path_provider/path_provider.dart';
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/// One belt level with its ITF grading requirements.
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class BeltLevel {
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const BeltLevel({
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required this.id,
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required this.gup,
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required this.name,
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required this.baseColor,
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this.stripeColor,
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required this.requirements,
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});
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final String id;
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final String gup;
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final String name;
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final Color baseColor;
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final Color? stripeColor;
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final List<String> requirements;
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}
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/// Tracks grading preparation: which requirements are checked off per belt,
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/// and which belt the user is currently preparing for. Persisted as JSON.
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class GradingService extends ChangeNotifier {
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static const _fileName = 'trainhub_grading.json';
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String? _currentBeltId;
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Map<String, Set<int>> _checked = {};
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bool _loaded = false;
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String? get currentBeltId => _currentBeltId;
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bool isChecked(String beltId, int index) =>
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_checked[beltId]?.contains(index) ?? false;
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int checkedCount(String beltId) => _checked[beltId]?.length ?? 0;
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double progress(BeltLevel belt) => belt.requirements.isEmpty
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? 0
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: checkedCount(belt.id) / belt.requirements.length;
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Future<File> _file() async {
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final dir = await getApplicationDocumentsDirectory();
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return File(p.join(dir.path, _fileName));
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}
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Future<void> ensureLoaded() async {
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if (_loaded) return;
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_loaded = true;
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try {
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final file = await _file();
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if (!file.existsSync()) return;
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final json = jsonDecode(await file.readAsString());
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_currentBeltId = json['current'] as String?;
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_checked = {
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for (final entry in (json['checked'] as Map? ?? {}).entries)
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entry.key as String: {
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for (final i in entry.value as List) (i as num).toInt(),
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},
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};
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notifyListeners();
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} catch (e) {
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if (kDebugMode) debugPrint('Failed to load grading state: $e');
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}
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}
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void toggle(String beltId, int index) {
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final set = _checked.putIfAbsent(beltId, () => {});
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set.contains(index) ? set.remove(index) : set.add(index);
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notifyListeners();
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_persist();
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}
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void setCurrentBelt(String? beltId) {
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_currentBeltId = beltId;
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notifyListeners();
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_persist();
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}
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Future<void> _persist() async {
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try {
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final file = await _file();
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await file.writeAsString(
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jsonEncode({
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'current': _currentBeltId,
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'checked': {
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for (final entry in _checked.entries)
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entry.key: entry.value.toList(),
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},
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}),
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);
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} catch (e) {
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if (kDebugMode) debugPrint('Failed to save grading state: $e');
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}
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}
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}
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// ---------------------------------------------------------------------------
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// ITF colored-belt syllabus (10 gup → 1 gup)
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// ---------------------------------------------------------------------------
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const _white = Color(0xFFF4F4F5);
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const _yellow = Color(0xFFFACC15);
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const _green = Color(0xFF22C55E);
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const _blue = Color(0xFF3B82F6);
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const _red = Color(0xFFFF2B2B);
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const _black = Color(0xFF18181B);
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const kBeltSyllabus = <BeltLevel>[
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BeltLevel(
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id: '10gup',
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gup: '10 GUP',
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name: 'White → Yellow Stripe',
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baseColor: _white,
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stripeColor: _yellow,
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requirements: [
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'Saju Jirugi (4-direction punch)',
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'Saju Makgi (4-direction block)',
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'Stances: charyot, narani, annun, gunnun sogi',
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'Ap Chagi (front snap kick) — both legs',
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'Theory: meaning of Taekwon-Do, belt colors, dojang etiquette',
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],
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),
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BeltLevel(
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id: '9gup',
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gup: '9 GUP',
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name: 'Yellow Stripe → Yellow',
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baseColor: _white,
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stripeColor: _yellow,
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requirements: [
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'Tul: Chon-Ji (19 movements)',
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'Niunja sogi (L-stance) + palmok daebi makgi',
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'Ap Chagi and Yop Chagi from walking stance',
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'3-step sparring (Sambo Matsogi) #1–2',
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'Theory: meaning of Chon-Ji, counting in Korean 1–10',
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],
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),
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BeltLevel(
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id: '8gup',
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gup: '8 GUP',
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name: 'Yellow',
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baseColor: _yellow,
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requirements: [
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'Tul: Dan-Gun (21 movements)',
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'Sonkal daebi makgi (knife-hand guarding block)',
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'Dollyo Chagi (turning kick) — both legs',
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'3-step sparring #1–4',
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'Theory: meaning of Dan-Gun, yellow belt symbolism',
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],
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),
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BeltLevel(
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id: '7gup',
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gup: '7 GUP',
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name: 'Yellow → Green Stripe',
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baseColor: _yellow,
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stripeColor: _green,
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requirements: [
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'Tul: Do-San (24 movements)',
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'Bakat palmok makgi + sonkal taerigi combinations',
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'Yopcha Jirugi (side piercing kick) — height improvement',
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'3-step sparring full set',
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'Theory: meaning of Do-San (Ahn Chang-Ho)',
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],
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),
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BeltLevel(
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id: '6gup',
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gup: '6 GUP',
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name: 'Green',
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baseColor: _green,
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requirements: [
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'Tul: Won-Hyo (28 movements)',
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'Gojung sogi (fixed stance) + punch',
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'Goro Chagi (hooking kick), Naeryo Chagi (downward kick)',
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'2-step sparring (Ibo Matsogi) #1–3',
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'Theory: meaning of Won-Hyo, green belt symbolism',
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],
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),
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BeltLevel(
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id: '5gup',
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gup: '5 GUP',
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name: 'Green → Blue Stripe',
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baseColor: _green,
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stripeColor: _blue,
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requirements: [
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'Tul: Yul-Gok (38 movements)',
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'Palkup taerigi (elbow strike), dwijibo jirugi',
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'Dwit Chagi (back piercing kick) — both legs',
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'2-step sparring full set + free sparring intro',
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'Theory: meaning of Yul-Gok (Yi I, "Confucius of Korea")',
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],
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),
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BeltLevel(
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id: '4gup',
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gup: '4 GUP',
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name: 'Blue',
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baseColor: _blue,
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requirements: [
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'Tul: Joong-Gun (32 movements)',
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'Kyocha sogi (X-stance), sang palmok makgi',
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'Bandae Dollyo Chagi (reverse turning kick)',
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'1-step sparring (Ilbo Matsogi) #1–3',
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'Theory: meaning of Joong-Gun (Ahn Joong-Gun)',
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],
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),
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BeltLevel(
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id: '3gup',
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gup: '3 GUP',
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name: 'Blue → Red Stripe',
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baseColor: _blue,
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stripeColor: _red,
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requirements: [
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'Tul: Toi-Gye (37 movements)',
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'W-shape block (san makgi) in annun sogi',
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'Twimyo Yop Chagi (flying side kick)',
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'1-step sparring full set + free sparring 2×2 min',
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'Theory: meaning of Toi-Gye (Yi Hwang)',
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],
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),
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BeltLevel(
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id: '2gup',
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gup: '2 GUP',
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name: 'Red',
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baseColor: _red,
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requirements: [
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'Tul: Hwa-Rang (29 movements)',
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'Combination kicking: dollyo + bandae dollyo chagi',
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'Twimyo Dollyo Chagi (flying turning kick)',
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'Free sparring 2×2 min + self-defence (hosinsul) basics',
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'Theory: meaning of Hwa-Rang, red belt symbolism',
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],
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),
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BeltLevel(
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id: '1gup',
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gup: '1 GUP',
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name: 'Red → Black Stripe',
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baseColor: _red,
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stripeColor: _black,
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requirements: [
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'Tul: Choong-Moo (30 movements)',
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'All previous patterns on demand',
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'Twimyo Bandae Dollyo Chagi (flying reverse turning kick)',
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'Free sparring vs two opponents + breaking (kyokpa)',
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'Theory: meaning of Choong-Moo (Admiral Yi Sun-Sin), full terminology',
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],
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),
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];
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