Swap Accept, Reject and Escalate

lib/providers/workforce_provider.dart

@@ -40,6 +40,45 @@ final dutySchedulesProvider = StreamProvider<List<DutySchedule>>((ref) {
       .map((rows) => rows.map(DutySchedule.fromMap).toList());
 });
 
+/// Fetch duty schedules by a list of IDs (used by UI when swap requests reference
+/// schedules that are not included in the current user's `dutySchedulesProvider`).
+final dutySchedulesByIdsProvider =
+    FutureProvider.family<List<DutySchedule>, List<String>>((ref, ids) async {
+      if (ids.isEmpty) return const <DutySchedule>[];
+      final client = ref.watch(supabaseClientProvider);
+      final quoted = ids.map((id) => '"$id"').join(',');
+      final inList = '($quoted)';
+      final rows =
+          await client
+                  .from('duty_schedules')
+                  .select()
+                  .filter('id', 'in', inList)
+              as List<dynamic>;
+      return rows
+          .map((r) => DutySchedule.fromMap(r as Map<String, dynamic>))
+          .toList();
+    });
+
+/// Fetch upcoming duty schedules for a specific user (used by swap UI to
+/// let the requester pick a concrete target shift owned by the recipient).
+final dutySchedulesForUserProvider =
+    FutureProvider.family<List<DutySchedule>, String>((ref, userId) async {
+      final client = ref.watch(supabaseClientProvider);
+      final nowIso = DateTime.now().toUtc().toIso8601String();
+      final rows =
+          await client
+                  .from('duty_schedules')
+                  .select()
+                  .eq('user_id', userId)
+                  /* exclude past schedules by ensuring the shift has not ended */
+                  .gte('end_time', nowIso)
+                  .order('start_time')
+              as List<dynamic>;
+      return rows
+          .map((r) => DutySchedule.fromMap(r as Map<String, dynamic>))
+          .toList();
+    });
+
 final swapRequestsProvider = StreamProvider<List<SwapRequest>>((ref) {
   final client = ref.watch(supabaseClientProvider);
   final profileAsync = ref.watch(currentProfileProvider);
@@ -110,12 +149,17 @@ class WorkforceController {
   }
 
   Future<String?> requestSwap({
-    required String shiftId,
+    required String requesterScheduleId,
+    required String targetScheduleId,
     required String recipientId,
   }) async {
     final data = await _client.rpc(
       'request_shift_swap',
-      params: {'p_shift_id': shiftId, 'p_recipient_id': recipientId},
+      params: {
+        'p_shift_id': requesterScheduleId,
+        'p_target_shift_id': targetScheduleId,
+        'p_recipient_id': recipientId,
+      },
     );
     return data as String?;
   }
@@ -130,6 +174,23 @@ class WorkforceController {
     );
   }
 
+  /// Reassign the recipient of a swap request. Only admins/dispatchers are
+  /// expected to call this; the DB RLS and RPCs will additionally enforce rules.
+  Future<void> reassignSwap({
+    required String swapId,
+    required String newRecipientId,
+  }) async {
+    // Prefer using an RPC for server-side validation, but update directly here
+    await _client
+        .from('swap_requests')
+        .update({
+          'recipient_id': newRecipientId,
+          'status': 'pending',
+          'updated_at': DateTime.now().toUtc().toIso8601String(),
+        })
+        .eq('id', swapId);
+  }
+
   String _formatDate(DateTime value) {
     final date = DateTime(value.year, value.month, value.day);
     final month = date.month.toString().padLeft(2, '0');