LeaveDuration daily and hourly on create modal completed

CompanyManagment.Application/LeaveApplication.cs

@@ -975,6 +975,9 @@ public class LeaveApplication : ILeaveApplication
 
     public async Task<string> GetHourlyLeaveDuration(string startHours, string endHours)
     {
+        if (string.IsNullOrWhiteSpace(startHours) || string.IsNullOrWhiteSpace(endHours))
+            return "";
+
         var start = new DateTime();
         var end = new DateTime();
         try
@@ -1015,4 +1018,25 @@ public class LeaveApplication : ILeaveApplication
         return ($"{hours}");
     
     }
+
+    public async Task<string> GetDailyLeaveDuration(string startDate, string endDate)
+    {
+        if (string.IsNullOrWhiteSpace(startDate) || string.IsNullOrWhiteSpace(endDate))
+            return "";
+
+        if (startDate.TryToGeorgianDateTime(out var start) == false || endDate.TryToGeorgianDateTime(out var end) == false)
+            return "";
+
+
+
+        if (end >= start)
+        {
+            var daysSpan = (end - start).TotalDays + 1;
+            return $"{(int)daysSpan} روز";
+        }
+        else
+        {
+            return "تاریخ پایان از تاریخ شروع کوچکتر است.";
+        }
+    }
 }