mesareportingservices/ReportingServices.Shared/HelperClasses/APIHelperFunctions.cs

using System.Web;

namespace ReportingServices.Shared.HelperClasses
{
    public static class APIHelperFunctions
    {
        public static string GetBeginningOfWeekAsAPIString()
        {
            DateTime date = DateTime.Now;

            int dayOfWeek = (int)date.DayOfWeek;

            date = dayOfWeek switch
            {
                0 => date.AddDays(-6),
                1 => date,
                _ => date.AddDays(1 - dayOfWeek)
            };

            return GetDateTimeAsAPIString(date.ToString(), false);
        }

        public static string GetDateWithOffsetAsAPIString(string dateString, float offset)
        {
            DateTime date = DateTime.Parse(dateString);

            date = date.AddHours(offset);

            return GetDateTimeAsAPIString(date.ToString(), true);
        }

        public static string GetDateTimeAsAPIString(string dateString, bool fullDateTime)
        {
            DateTime date = DateTime.Parse(dateString);

            if (fullDateTime)
                dateString = date.ToString("yyyy-M-d HH:mm:ss");
            else
                dateString = date.Year + "-" + date.Month + "-" + date.Day + " 0:0:0";

            return dateString;
        }

        public static List<T> ReverseList<T>(List<T> inputList)
        {
            List<T> temp = new();

            for (int i = inputList.Count - 1; i >= 0; i--)
            {
                temp.Add(inputList[i]);
            }

            return temp;
        }
    }
}