fixed the one week offset issue in weekly dates

code/dihlibs/dhis/__init__.py

@@ -213,11 +213,15 @@ def get_period(self, when, period_type="monthly"):
             }
         ).get(period_type.lower())
 
-    def get_week_date(self,date): 
+    def get_week_date(self,date):
         parts = date.split("W")
-        week_start = 7 * int(parts[1])
-        year_start = datetime.strptime(parts[0], "%Y")
-        return year_start +  relativedelta(days=abs(week_start))
+        year = int(parts[0])
+        week = int(parts[1])
+        year_start = datetime(year, 1, 1)
+        week_start = year_start + relativedelta(weeks=week-1)
+        while week_start.weekday() != 0:  # 0 means Monday
+            week_start += relativedelta(days=1)
+        return week_start
 
     def period_to_db_date(self, date: str):
         formats = ["%Y-%m-%d", "%YW%W", "%Y%m", "%Y"]
@@ -236,6 +240,7 @@ def set_period_cols(r):
             col_name = ("issued_" if "referral" in r.db_view else f"reported_") + pt
 
             period = self.get_period(date, r.period_type)
+            print("period is",period,' and date is ',date)
             db_val = self.period_to_db_date(period)
             return col_name, db_val, period
         e_map = e_map.reset_index().merge(