def get_by_goal_name(cls, connection, goal_name, week, completed=None):
"""Get all activities with goal_name from 'activity_goal' table on <week> of all users
:param connection: DB connection object
:param goal_name: goal name
:param week: week number
:param completed: status of the activity (True/False/None)
True - returns all the completed goal_name goals of all users
False - return all the in-progress goal_name goals of all user
None - return all the goals_name goals of all users
:return: list of activities of all users with goal_name
[{
'user_id': <user-id>,
'goal_id': <goal-id>,
'frequency': <number-of-times-goal-performed> (3),
'last_updated': <datetime>,
'completed_on': {1: <datetime>, 2: <datetime>, 3: <datetime>},
'completed': True (or) False
}]
"""
goal_id = Goal.get_goal_id(connection, goal_name, week)
return cls.get_by_goal_id(connection, goal_id, completed=completed)
