499 lines
16 KiB
Dart
499 lines
16 KiB
Dart
import 'package:flutter/foundation.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:supabase_flutter/supabase_flutter.dart';
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import 'package:uuid/uuid.dart';
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import '../brick/cache_helpers.dart';
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import '../models/leave_of_absence.dart';
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import '../utils/app_time.dart';
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import '../utils/snackbar.dart' show isOfflineSaveError;
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import 'connectivity_provider.dart';
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import 'profile_provider.dart';
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import 'supabase_provider.dart';
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import 'stream_recovery.dart';
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import 'realtime_controller.dart';
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// ---------------------------------------------------------------------------
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// Offline-pending state
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// ---------------------------------------------------------------------------
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/// Leaves filed offline that haven't been confirmed by Supabase yet. Merged
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/// into [leavesProvider] so the UI shows them immediately. Cleared as the
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/// realtime stream confirms each id.
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final offlinePendingLeavesProvider =
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StateProvider<List<LeaveOfAbsence>>((ref) => const []);
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/// Status changes (approve/reject/cancel) made offline, keyed by leave id.
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/// On reconnect the listener PATCHes each entry and clears the map.
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final offlinePendingLeaveUpdatesProvider =
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StateProvider<Map<String, Map<String, dynamic>>>((ref) => const {});
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// ---------------------------------------------------------------------------
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// Read provider
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// ---------------------------------------------------------------------------
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/// All visible leaves (own for standard, all for admin/dispatcher/it_staff).
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///
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/// Consumers should **not** treat every record as an active absence; the UI
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/// layers (dashboard, logbook) explicitly filter to `status == 'approved'` and
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/// verify the leave overlaps the current time.
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final leavesProvider = StreamProvider<List<LeaveOfAbsence>>((ref) {
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final client = ref.watch(supabaseClientProvider);
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final profileAsync = ref.watch(currentProfileProvider);
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final profile = profileAsync.valueOrNull;
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if (profile == null) return Stream.value(const <LeaveOfAbsence>[]);
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final hasFullAccess =
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profile.role == 'admin' ||
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profile.role == 'programmer' ||
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profile.role == 'dispatcher' ||
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profile.role == 'it_staff';
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// Watch pending state — provider rebuilds when offline writes arrive so the
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// closed-over `pending*` values feed into `onOfflineData` synchronously.
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final pendingNew = ref.watch(offlinePendingLeavesProvider);
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final pendingUpdates = ref.watch(offlinePendingLeaveUpdatesProvider);
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List<LeaveOfAbsence> applyPending(List<LeaveOfAbsence> rows) {
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final byId = {for (final r in rows) r.id: r};
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// Merge offline status updates onto existing leaves
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pendingUpdates.forEach((id, fields) {
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final existing = byId[id];
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if (existing == null) return;
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byId[id] = LeaveOfAbsence(
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id: existing.id,
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userId: existing.userId,
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leaveType: existing.leaveType,
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justification: existing.justification,
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startTime: existing.startTime,
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endTime: existing.endTime,
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status: (fields['status'] as String?) ?? existing.status,
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filedBy: existing.filedBy,
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createdAt: existing.createdAt,
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);
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});
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// Append offline-created leaves not yet on the server
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for (final p in pendingNew) {
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if (hasFullAccess || p.userId == profile.id) {
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byId.putIfAbsent(p.id, () => p);
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}
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}
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final merged = byId.values.toList()
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..sort((a, b) => b.startTime.compareTo(a.startTime));
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return merged;
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}
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final wrapper = StreamRecoveryWrapper<LeaveOfAbsence>(
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stream: hasFullAccess
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? client
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.from('leave_of_absence')
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.stream(primaryKey: ['id'])
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.order('start_time', ascending: false)
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: client
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.from('leave_of_absence')
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.stream(primaryKey: ['id'])
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.eq('user_id', profile.id)
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.order('start_time', ascending: false),
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onPollData: () async {
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final query = client.from('leave_of_absence').select();
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final data = hasFullAccess
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? await query.order('start_time', ascending: false)
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: await query
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.eq('user_id', profile.id)
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.order('start_time', ascending: false);
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return data.map(LeaveOfAbsence.fromMap).toList();
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},
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fromMap: LeaveOfAbsence.fromMap,
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channelName: 'leave_of_absence',
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onStatusChanged: ref.read(realtimeControllerProvider).handleChannelStatus,
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onOfflineData: () async {
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final all = await cachedListFromBrick<LeaveOfAbsence>();
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final filtered = hasFullAccess
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? all
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: all.where((l) => l.userId == profile.id).toList();
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return applyPending(filtered);
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},
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onCacheMirror: (rows) =>
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mirrorBatchToBrick<LeaveOfAbsence>(rows, tag: 'leave_of_absence'),
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);
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ref.onDispose(wrapper.dispose);
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// Reconnect-replay: directly POST queued items, bypassing Brick's queue
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// which can block on stale entries (504, deadlock, etc.).
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ref.listen<bool>(isOnlineProvider, (wasOnline, isNowOnline) async {
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if (wasOnline == true || !isNowOnline) return;
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// 1. Replay offline-created leaves
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final pending = List<LeaveOfAbsence>.from(ref.read(offlinePendingLeavesProvider));
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if (pending.isNotEmpty) {
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debugPrint('[leavesProvider] reconnected — syncing ${pending.length} leave(s)');
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final synced = <String>[];
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for (final leave in pending) {
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try {
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await client.from('leave_of_absence').insert({
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'id': leave.id,
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'user_id': leave.userId,
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'leave_type': leave.leaveType,
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'justification': leave.justification,
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'start_time': leave.startTime.toIso8601String(),
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'end_time': leave.endTime.toIso8601String(),
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'status': leave.status,
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'filed_by': leave.filedBy,
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});
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synced.add(leave.id);
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} catch (e) {
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final msg = e.toString();
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if (msg.contains('23505') || msg.contains('duplicate key')) {
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synced.add(leave.id); // already in DB — drop pending entry
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} else {
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debugPrint('[leavesProvider] failed to sync leave id=${leave.id}: $e');
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}
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}
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}
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if (synced.isNotEmpty) {
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final remaining = ref.read(offlinePendingLeavesProvider)
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.where((l) => !synced.contains(l.id))
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.toList();
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ref.read(offlinePendingLeavesProvider.notifier).state =
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List.unmodifiable(remaining);
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}
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}
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// 2. Replay offline status updates
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final pendingMap = Map<String, Map<String, dynamic>>.from(
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ref.read(offlinePendingLeaveUpdatesProvider),
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);
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if (pendingMap.isNotEmpty) {
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debugPrint(
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'[leavesProvider] reconnected — syncing ${pendingMap.length} status edit(s)',
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);
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final syncedIds = <String>[];
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for (final entry in pendingMap.entries) {
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try {
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await client
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.from('leave_of_absence')
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.update(entry.value)
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.eq('id', entry.key);
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syncedIds.add(entry.key);
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} catch (e) {
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debugPrint('[leavesProvider] failed to sync edit id=${entry.key}: $e');
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}
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}
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if (syncedIds.isNotEmpty) {
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final remaining = Map<String, Map<String, dynamic>>.from(
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ref.read(offlinePendingLeaveUpdatesProvider),
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);
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for (final id in syncedIds) {
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remaining.remove(id);
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}
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ref.read(offlinePendingLeaveUpdatesProvider.notifier).state = remaining;
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}
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}
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});
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return wrapper.stream.map((result) => applyPending(result.data));
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});
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// ---------------------------------------------------------------------------
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// Controller
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// ---------------------------------------------------------------------------
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final leaveControllerProvider = Provider<LeaveController>((ref) {
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final client = ref.watch(supabaseClientProvider);
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return LeaveController(client, ref);
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});
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class LeaveController {
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LeaveController(this._client, [this._ref]);
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final SupabaseClient _client;
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final Ref? _ref;
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/// File a leave of absence for the current user.
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/// Caller controls auto-approval based on role policy.
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/// Offline: queues a local row + raw payload, returns silently.
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Future<void> fileLeave({
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required String leaveType,
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required String justification,
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required DateTime startTime,
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required DateTime endTime,
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required bool autoApprove,
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}) async {
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final uid = _client.auth.currentUser!.id;
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final id = const Uuid().v4();
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final status = autoApprove ? 'approved' : 'pending';
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final payload = {
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'id': id,
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'user_id': uid,
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'leave_type': leaveType,
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'justification': justification,
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'start_time': startTime.toIso8601String(),
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'end_time': endTime.toIso8601String(),
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'status': status,
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'filed_by': uid,
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};
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Map<String, dynamic>? inserted;
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try {
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final insertedRaw = await _client
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.from('leave_of_absence')
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.insert(payload)
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.select()
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.maybeSingle();
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inserted = insertedRaw is Map<String, dynamic> ? insertedRaw : null;
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} catch (e) {
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if (!isOfflineSaveError(e)) rethrow;
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_queuePendingLeave(
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LeaveOfAbsence(
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id: id,
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userId: uid,
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leaveType: leaveType,
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justification: justification,
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startTime: startTime,
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endTime: endTime,
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status: status,
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filedBy: uid,
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createdAt: AppTime.now(),
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),
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);
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return; // Don't try to notify admins — we're offline.
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}
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// If this was filed as pending, notify admins for approval
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if (status != 'pending') return;
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await _notifyAdminsOfFiling(inserted: inserted, leaveId: id, actorId: uid);
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}
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void _queuePendingLeave(LeaveOfAbsence leave) {
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final ref = _ref;
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if (ref == null) return;
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final current = List<LeaveOfAbsence>.from(
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ref.read(offlinePendingLeavesProvider),
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);
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current.add(leave);
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ref.read(offlinePendingLeavesProvider.notifier).state =
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List.unmodifiable(current);
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mirrorBatchToBrick<LeaveOfAbsence>([leave], tag: 'offline_leave');
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}
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void _queueLeaveStatusUpdate(String leaveId, Map<String, dynamic> fields) {
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final ref = _ref;
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if (ref == null) return;
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final current = Map<String, Map<String, dynamic>>.from(
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ref.read(offlinePendingLeaveUpdatesProvider),
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);
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current[leaveId] = {...?current[leaveId], ...fields};
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ref.read(offlinePendingLeaveUpdatesProvider.notifier).state = current;
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}
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Future<void> _notifyAdminsOfFiling({
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required Map<String, dynamic>? inserted,
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required String leaveId,
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required String actorId,
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}) async {
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try {
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final adminIds = await _fetchRoleUserIds(
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roles: const ['admin'],
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excludeUserId: actorId,
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);
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if (adminIds.isEmpty) return;
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String actorName = 'Someone';
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try {
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final p = await _client
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.from('profiles')
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.select('full_name,display_name,name')
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.eq('id', actorId)
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.maybeSingle();
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if (p != null) {
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if (p['full_name'] != null) {
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actorName = p['full_name'].toString();
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} else if (p['display_name'] != null) {
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actorName = p['display_name'].toString();
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} else if (p['name'] != null) {
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actorName = p['name'].toString();
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}
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}
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} catch (_) {}
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final title = 'Leave Filed for Approval';
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final body = '$actorName filed a leave request that requires approval.';
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final notificationId = (inserted ?? <String, dynamic>{})['id']?.toString();
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final dataPayload = <String, dynamic>{
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'type': 'leave_filed',
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'leave_id': leaveId,
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...?(notificationId != null ? {'notification_id': notificationId} : null),
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};
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await _client.from('notifications').insert(
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adminIds
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.map((userId) => {
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'user_id': userId,
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'actor_id': actorId,
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'type': 'leave_filed',
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'leave_id': leaveId,
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})
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.toList(),
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);
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final res = await _client.functions.invoke(
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'send_fcm',
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body: {
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'user_ids': adminIds,
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'title': title,
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'body': body,
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'data': dataPayload,
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},
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);
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debugPrint('leave filing send_fcm result: $res');
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} catch (e) {
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debugPrint('leave filing send_fcm error: $e');
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// Non-fatal: keep leave filing working even if send_fcm fails
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}
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}
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/// Approve a leave request.
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Future<void> approveLeave(String leaveId) async {
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final userId = _client.auth.currentUser?.id;
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if (userId == null) throw Exception('Not authenticated');
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try {
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await _client
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.from('leave_of_absence')
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.update({'status': 'approved'})
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.eq('id', leaveId);
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} catch (e) {
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if (!isOfflineSaveError(e)) rethrow;
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_queueLeaveStatusUpdate(leaveId, {'status': 'approved'});
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return;
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}
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// Notify requestor (best-effort)
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try {
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await _notifyRequester(leaveId: leaveId, actorId: userId, approved: true);
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} catch (_) {}
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}
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/// Reject a leave request.
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Future<void> rejectLeave(String leaveId) async {
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final userId = _client.auth.currentUser?.id;
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if (userId == null) throw Exception('Not authenticated');
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try {
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await _client
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.from('leave_of_absence')
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.update({'status': 'rejected'})
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.eq('id', leaveId);
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} catch (e) {
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if (!isOfflineSaveError(e)) rethrow;
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_queueLeaveStatusUpdate(leaveId, {'status': 'rejected'});
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return;
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}
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try {
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await _notifyRequester(leaveId: leaveId, actorId: userId, approved: false);
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} catch (_) {}
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}
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Future<void> _notifyRequester({
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required String leaveId,
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required String actorId,
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required bool approved,
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}) async {
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try {
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final row = await _client
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.from('leave_of_absence')
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.select('user_id')
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.eq('id', leaveId)
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.maybeSingle();
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// ignore: unnecessary_cast
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final rowMap = row as Map<String, dynamic>?;
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final userId = rowMap?['user_id']?.toString();
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if (userId == null || userId.isEmpty) return;
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String actorName = 'Someone';
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try {
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final p = await _client
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.from('profiles')
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.select('full_name,display_name,name')
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.eq('id', actorId)
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.maybeSingle();
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if (p != null) {
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if (p['full_name'] != null) {
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actorName = p['full_name'].toString();
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} else if (p['display_name'] != null) {
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actorName = p['display_name'].toString();
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} else if (p['name'] != null) {
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actorName = p['name'].toString();
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}
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}
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} catch (_) {}
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final title = approved ? 'Leave Approved' : 'Leave Rejected';
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final body = approved
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? '$actorName approved your leave request.'
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: '$actorName rejected your leave request.';
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final dataPayload = <String, dynamic>{
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'type': approved ? 'leave_approved' : 'leave_rejected',
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'leave_id': leaveId,
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};
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await _client.from('notifications').insert({
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'user_id': userId,
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'actor_id': actorId,
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'type': approved ? 'leave_approved' : 'leave_rejected',
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'leave_id': leaveId,
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});
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await _client.functions.invoke(
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'send_fcm',
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body: {
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'user_ids': [userId],
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'title': title,
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'body': body,
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'data': dataPayload,
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},
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);
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} catch (_) {
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// non-fatal
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}
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}
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/// Cancel an approved leave.
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Future<void> cancelLeave(String leaveId) async {
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try {
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await _client
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.from('leave_of_absence')
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.update({'status': 'cancelled'})
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.eq('id', leaveId);
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} catch (e) {
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if (!isOfflineSaveError(e)) rethrow;
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_queueLeaveStatusUpdate(leaveId, {'status': 'cancelled'});
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}
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}
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Future<List<String>> _fetchRoleUserIds({
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required List<String> roles,
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required String? excludeUserId,
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}) async {
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try {
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final data = await _client
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.from('profiles')
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.select('id, role')
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.inFilter('role', roles);
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final rows = data as List<dynamic>;
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final ids = rows
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.map((row) => row['id'] as String?)
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.whereType<String>()
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.where((id) => id.isNotEmpty && id != excludeUserId)
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.toList();
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return ids;
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} catch (_) {
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return [];
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}
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}
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}
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