wip

packages/racing/domain/value-objects/RecurrenceStrategy.ts

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+import { WeekdaySet } from './WeekdaySet';
+import { MonthlyRecurrencePattern } from './MonthlyRecurrencePattern';
+
+export type RecurrenceStrategyKind = 'weekly' | 'everyNWeeks' | 'monthlyNthWeekday';
+
+export type WeeklyRecurrence = {
+  kind: 'weekly';
+  weekdays: WeekdaySet;
+};
+
+export type EveryNWeeksRecurrence = {
+  kind: 'everyNWeeks';
+  intervalWeeks: number;
+  weekdays: WeekdaySet;
+};
+
+export type MonthlyNthWeekdayRecurrence = {
+  kind: 'monthlyNthWeekday';
+  monthlyPattern: MonthlyRecurrencePattern;
+};
+
+export type RecurrenceStrategy =
+  | WeeklyRecurrence
+  | EveryNWeeksRecurrence
+  | MonthlyNthWeekdayRecurrence;
+
+export class RecurrenceStrategyFactory {
+  static weekly(weekdays: WeekdaySet): RecurrenceStrategy {
+    return {
+      kind: 'weekly',
+      weekdays,
+    };
+  }
+
+  static everyNWeeks(intervalWeeks: number, weekdays: WeekdaySet): RecurrenceStrategy {
+    if (!Number.isInteger(intervalWeeks) || intervalWeeks < 1 || intervalWeeks > 12) {
+      throw new Error('everyNWeeks intervalWeeks must be an integer between 1 and 12');
+    }
+
+    return {
+      kind: 'everyNWeeks',
+      intervalWeeks,
+      weekdays,
+    };
+  }
+
+  static monthlyNthWeekday(monthlyPattern: MonthlyRecurrencePattern): RecurrenceStrategy {
+    return {
+      kind: 'monthlyNthWeekday',
+      monthlyPattern,
+    };
+  }
+}