Initial commit: Krow Worker App

lib/models/shift.dart

@@ -0,0 +1,95 @@
+enum ShiftStatus { open, booked, active, completed, cancelled, noShow }
+
+extension ShiftStatusX on ShiftStatus {
+  String get label => switch (this) {
+    ShiftStatus.open => 'Open',
+    ShiftStatus.booked => 'Confirmed',
+    ShiftStatus.active => 'In progress',
+    ShiftStatus.completed => 'Completed',
+    ShiftStatus.cancelled => 'Cancelled',
+    ShiftStatus.noShow => 'No show',
+  };
+}
+
+class Shift {
+  Shift({
+    required this.id,
+    required this.role,
+    required this.business,
+    required this.venue,
+    required this.address,
+    required this.start,
+    required this.end,
+    required this.rate,
+    required this.status,
+    this.breakMinutes = 30,
+    this.distanceMiles = 2.4,
+    this.manager,
+    this.clockIn,
+    this.clockOut,
+    this.requirements = const [],
+  });
+
+  final String id;
+  final String role;
+  final String business;
+  final String venue;
+  final String address;
+  final DateTime start;
+  final DateTime end;
+  final double rate;
+  final ShiftStatus status;
+  final int breakMinutes;
+  final double distanceMiles;
+  final String? manager;
+  final DateTime? clockIn;
+  final DateTime? clockOut;
+  final List<String> requirements;
+
+  /// Paid duration: the scheduled window less the unpaid break.
+  Duration get scheduledDuration =>
+      end.difference(start) - Duration(minutes: breakMinutes);
+
+  /// What was actually worked, once clocked out.
+  Duration? get workedDuration {
+    if (clockIn == null || clockOut == null) return null;
+    final d = clockOut!.difference(clockIn!) - Duration(minutes: breakMinutes);
+    return d.isNegative ? Duration.zero : d;
+  }
+
+  double get scheduledPay => rate * scheduledDuration.inMinutes / 60;
+
+  /// Gross, pre-tax. Falls back to the scheduled figure until clocked out.
+  double get pay {
+    if (status == ShiftStatus.cancelled || status == ShiftStatus.noShow) {
+      return 0;
+    }
+    final worked = workedDuration;
+    if (worked != null) return rate * worked.inMinutes / 60;
+    return scheduledPay;
+  }
+
+  String get logoLetter => business.isEmpty ? '?' : business[0].toUpperCase();
+
+  Shift copyWith({
+    ShiftStatus? status,
+    DateTime? clockIn,
+    DateTime? clockOut,
+  }) => Shift(
+    id: id,
+    role: role,
+    business: business,
+    venue: venue,
+    address: address,
+    start: start,
+    end: end,
+    rate: rate,
+    status: status ?? this.status,
+    breakMinutes: breakMinutes,
+    distanceMiles: distanceMiles,
+    manager: manager,
+    clockIn: clockIn ?? this.clockIn,
+    clockOut: clockOut ?? this.clockOut,
+    requirements: requirements,
+  );
+}