Added new methods to leankit library and a check for the api limit when doing get requests

library/leankit/__init__.py

@@ -145,6 +145,41 @@ def get_cards_by_board(board_id):
 
     return leankitData
 
+def get_parent_cards(card_id, board_id):
+    """
+    https://success.planview.com/Planview_LeanKit/LeanKit_API/01_v2/connections/parents
+
+    Method to list the parent cards of a specific card
+    :param card_id: the id of the card to list its parents
+    :param board_id: the id of the board to which the card belongs to
+
+    :return: list of card objects  
+    """
+    request_params = {
+       'board': board_id,  
+        'limit': '100000'
+    }
+
+    leankitData = api._get(f'/io/card/{card_id}/connection/parents', url_params = request_params)
+
+    return leankitData
+
+def add_parent(card_id, parent_id):
+    """
+    https://success.planview.com/Planview_LeanKit/LeanKit_API/01_v2/connections/create
+
+    Method to add a parent connection to a card
+    :param card_id: the id of card to add the parent connection
+    :param parent_id: the id of the parent to be added as a connection
+    :return 201 Created
+    """
+    request_params = {
+        "cardIds":[card_id],
+        "connections":{
+            "parents":[parent_id]
+        }
+    }
+    return api._post(f'/io/card/connections', request_params)
 
 '''
 def get_newer_if_exists(board_id, version, timezone='UTC'):

library/leankit/connector.py

@@ -3,6 +3,9 @@ import requests
 from requests import Response, Request
 from pprint import pformat
 from json import dumps as json_dumps
+from datetime import datetime
+import pandas as pd
+import time
 from . import env_user
 
 
@@ -39,6 +42,12 @@ class Leankit(object):
                 raise IOError("Invalid response")
         else:
             msg = 'Server responded with code {0.status_code}'.format(request)
+            if request.status_code == 429:
+                if "Retry-After" in request.headers:
+                    retry_after = request.headers['Retry-After']#Fri, 10 Jun 2022 08:32:14 GMT
+                    time_diff = pd.to_datetime(retry_after.rsplit(" ",1)[0])  - datetime.utcnow()
+                    time.sleep(time_diff.total_seconds())
+                    return self._get(url, url_params)
             msg += ' ' + str(request.text)
             raise ConnectionError(msg)