🐛 archaeological files: manage business for deadlines (refs #6218)

1 files changed, 21 insertions, 0 deletions

diff --git a/ishtar_common/utils.py b/ishtar_common/utils.py
index af4ea06dc..4e80ac60a 100644
--- a/ishtar_common/utils.py
+++ b/ishtar_common/utils.py
@@ -3151,6 +3151,27 @@ def reverse_list_coordinates(lst):
     return list(reversed(lst))
 
 
+def add_business_days(from_date: datetime.datetime,
+                      business_days_to_add: int) -> datetime.datetime:
+    """
+    Add days to a date with exclusion of saturday and sunday.
+    """
+    num_whole_weeks = business_days_to_add // 5
+    extra_days = num_whole_weeks * 2
+
+    # manage the last week
+    first_weekday = from_date.weekday()
+    remainder_days = business_days_to_add % 5
+
+    if (first_weekday + remainder_days) > 4:
+        if first_weekday == 5:
+            extra_days += 1
+        elif first_weekday != 6:
+            extra_days += 2
+
+    return from_date + datetime.timedelta(business_days_to_add + extra_days)
+
+
 class EachCharacterTypeValidator:
     def __init__(self, character_types=None):
         if not character_types: