update code ngu

src/common/utils/datetime.utils.ts

@@ -142,4 +142,19 @@ export class DateTimeUtils {
   static getTimeFromDateTime(dateTime: DateTime): TimeType {
     return this.toTime(`${dateTime.hour}:${dateTime.minute}:${dateTime.second}`)
   }
+
+  static subtractDaysFromTimeframe(timeframe: string): DateTime {
+    // convert timeframe to number of days: 'day' -> 1, 'week' -> 7, 'month' -> 30, 'year' -> 365
+    const daysMap: Record<string, number> = {
+      day: 1,
+      week: 7,
+      month: 30,
+      year: 365,
+    }
+    const days = daysMap[timeframe.toLowerCase()]
+    if (days === undefined) {
+      throw new Error(`Invalid timeframe: ${timeframe}`)
+    }
+    return DateTime.now().minus({ days })
+  }
 }