add scopes india api

Author: utsav-pal

src/india_api/internal/inputs/utils.py

@@ -1,4 +1,5 @@
 import datetime as dt
+from zoneinfo import ZoneInfo  # Available in Python 3.9 and later
 
 
 def get_window() -> tuple[dt.datetime, dt.datetime]:
@@ -17,4 +18,28 @@ def get_window() -> tuple[dt.datetime, dt.datetime]:
         second=0,
         microsecond=0,
     )
-    return (start, end)
+    return (start, end)
+
+def get_forecast_deadline(forecast_date_str: str) -> str:
+    """
+    Calculate the submission deadline for a given forecast date.
+
+    Args:
+        forecast_date_str (str): The forecast date in 'YYYY-MM-DD' format.
+
+    Returns:
+        str: The submission deadline in 'YYYY-MM-DD HH:MM IST' format.
+    """
+    # Define the IST timezone
+    ist = ZoneInfo('Asia/Kolkata')
+
+    # Parse the input forecast date string into a datetime object
+    forecast_date = dt.datetime.strptime(forecast_date_str, '%Y-%m-%d')
+
+    # Calculate the deadline: 9:00 AM IST on the day before the forecast date
+    deadline = dt.datetime.combine(forecast_date - dt.timedelta(days=1), dt.time(9, 0), tzinfo=ist)
+
+    # Format the deadline as a string
+    deadline_str = deadline.strftime('%Y-%m-%d %H:%M %Z')
+
+    return deadline_str