feat: add money request cronjob, and edit money request entity

src/money-request/entities/money-request.entity.ts

@@ -1,3 +1,4 @@
+import moment from 'moment';
 import {
   Column,
   CreateDateColumn,
@@ -31,6 +32,9 @@ export class MoneyRequest {
   @Column({ type: 'timestamp with time zone', name: 'reviewed_at', nullable: true })
   reviewedAt!: Date;
 
+  @Column({ type: 'timestamp with time zone', name: 'start_date', nullable: true })
+  startDate!: Date | null;
+
   @Column({ type: 'timestamp with time zone', name: 'end_date', nullable: true })
   endDate!: Date | null;
 
@@ -53,4 +57,41 @@ export class MoneyRequest {
 
   @UpdateDateColumn({ type: 'timestamp with time zone', name: 'updated_at' })
   updatedAt!: Date;
+
+  get nextPaymentDate(): Date | null {
+    if (this.frequency === MoneyRequestFrequency.ONE_TIME) {
+      return null;
+    }
+    const startDate = moment(this.startDate).clone().startOf('day');
+    const endDate = this.endDate ? moment(this.endDate).endOf('day') : null;
+    const now = moment().startOf('day');
+
+    if (endDate && moment().isAfter(endDate)) {
+      return null;
+    }
+
+    const calculateNextDate = (unit: moment.unitOfTime.Diff) => {
+      const diff = now.diff(startDate, unit);
+      const nextDate = startDate.clone().add(diff, unit);
+
+      const adjustedDate = nextDate.isSameOrAfter(now) ? nextDate : nextDate.add('1', unit);
+
+      if (endDate && adjustedDate.isAfter(endDate)) {
+        return null;
+      }
+
+      return adjustedDate.toDate();
+    };
+
+    switch (this.frequency) {
+      case MoneyRequestFrequency.DAILY:
+        return calculateNextDate('days');
+      case MoneyRequestFrequency.WEEKLY:
+        return calculateNextDate('weeks');
+      case MoneyRequestFrequency.MONTHLY:
+        return calculateNextDate('months');
+      default:
+        return null;
+    }
+  }
 }