AA-33: Function to uniquely create calendar event id for user and assignment

openedx/features/calendar_sync/__init__.py

@@ -0,0 +1,17 @@
+"""
+Calendar syncing Course dates with a User.
+"""
+
+
+def get_calendar_event_id(user, block_key, date_type):
+    """
+    Creates a unique event id based on a user and a course block key
+
+    Parameters:
+        user (User): The user requesting a calendar event
+        block_key (str): The block key containing the date for the calendar event
+        date_type (str): The type of the date (e.g. 'due', 'start', 'end', etc.)
+    Returns:
+        event id (str)
+    """
+    return user.username + '.' + block_key + '.' + date_type

openedx/features/calendar_sync/tests/test_init.py

@@ -0,0 +1,25 @@
+""" Tests the contents of the __init__.py file """
+
+
+from django.test import TestCase
+
+from openedx.features.calendar_sync import get_calendar_event_id
+from student.tests.factories import UserFactory
+
+TEST_PASSWORD = 'test'
+
+
+class TestCalendarSyncInit(TestCase):
+    """ Tests for the contents of __init__.py """
+    def setUp(self):
+        super(TestCalendarSyncInit, self).setUp()
+        self.user = UserFactory(password=TEST_PASSWORD)
+
+    def test_get_calendar_event_id(self):
+        block_key = 'block-v1:Org+Number+Term+type@sequential+block@gibberish'
+        date_type = 'due'
+        event_id = get_calendar_event_id(self.user, block_key, date_type)
+        expected = '{username}.{block_key}.{date_type}'.format(
+            username=self.user.username, block_key=block_key, date_type=date_type
+        )
+        self.assertEqual(event_id, expected)