def handle_login():
"""
Login endpoint. It is used for logging a user in.
If the email and the password passed in the request body are valid ones it returns a
valid token for the authentication in the API gateway.
"""
data = request.get_json()
if validate_request_paylaod(data):
email = data['email']
password = data['password']
user_id = get_user_id_by_credentials(email, password)
if user_id:
# retrieves a new token for this user
KONG_JWT_API = f"http://{KONG_IP}:8001/consumers/{email}/jwt"
response = requests.post(KONG_JWT_API, data={"algorithm": "HS256"})
data = response.json()
headers = {"typ": "JWT", "alg": "HS256"}
claims = {"iss": data['key']}
token = jwt.encode(claims, data['secret'], headers=headers)
if not response.status_code == 201:
logger.error(f'Could not build token for {request}')
return ko(dict(error='Could not build token'))
logger.info(f"Generated JWT Token: {token} for user {user_id}")
return ok(jsonify(dict(auth_token=token.decode(), id=user_id)))
return bad_request(jsonify(dict(error='invalid_data')))
def handle_get_event(user_id, calendar_id, id):
"""
This query endpoint returns an event resource.
:return: a json object with the event info on a 200 response status code.
"""
cal_id = get_user_calendar_id(user_id, calendar_id)
if not cal_id:
return not_found(jsonify(dict(error='Calendar not found')))
event, event_recurrences = get_event(user_id, calendar_id, id)
if not event:
return not_found(jsonify(dict(error='Event not found')))
response = dict(name=event.name,
location=event.location,
start_time=strftime(event.start_time),
end_time=strftime(event.end_time),
next_is_base=event.next_is_base,
recurrence_rule=event.recurrence_rule.value,
until=strftime(event.until),
flex=event.flex,
flex_duration=event.flex_duration,
recurrences=[])
for recurrence in event_recurrences:
response['recurrences'].append(
dict(recurrence_id=recurrence.id,
start_time=strftime(recurrence.start_time),
end_time=strftime(recurrence.end_time)))
return ok(jsonify(response))
def handle_get_global_preferences(user_id):
"""
This query endpoint returns the global preferences of a user.
:return: a json object with the global preferences on a 200 response status code.
"""
global_preferences = get_user_global_preferences(user_id)
if global_preferences:
response = dict(global_preferences.preferences)
return ok(jsonify(response))
return not_found(jsonify(dict(error='User not found')))
def handle_get(user_id):
"""
This is the only endpoint query side. It is used for retrieving a user resource data.
:return: a json object with the user info on a 200 response status code.
"""
user = get_user_by_id(user_id)
if user:
return ok(
jsonify(
dict(id=user.id,
email=user.email,
first_name=user.first_name,
last_name=user.last_name)))
return not_found(jsonify(dict(error='User not found')))
def handle_delete(user_id, id):
"""
Delete calendar endpoint. It deletes a calendar.
"""
aggregate_status = build_calendar_aggregate()
if aggregate_status == -1:
logger.error(
f'Could not build calendar aggregate for request: {request}')
return ko(jsonify(dict(error='cannot build calendar aggregate')))
if not (str(user_id) in aggregate_status.keys()):
return not_found(jsonify(dict(error='invalid user')))
if not (str(id) in aggregate_status[str(user_id)]['calendars'].keys()):
return not_found(jsonify(dict(error='invalid calendar')))
event = CalendarDeletedEvent(user_id=user_id, id=id)
session = EventStoreSession()
try:
# both of these are wrapped inside a unique try catch because this must be an atomic operation.
CalendarEvent.append_event(event)
event_published = publish_event(get_sending_channel(), event,
CALENDAR_DELETED)
if not event_published:
logger.error(
f'Could not publish event on event bus for request: {request}')
session.rollback()
return ko(
jsonify(dict(error='could not publish event on event bus')))
else:
session.commit()
logger.info(f'Deleted calendar for user {user_id} with id: {id}')
return ok(jsonify(dict(user_id=user_id, id=id)))
except SQLAlchemyError:
session.rollback()
logger.error(f'Could not append to event store for request: {request}')
return ko(jsonify(dict(error='could not append to event store')))
finally:
session.close()
def handle_preferences(user_id):
"""
Global preferences modify endpoint. It modifies user global preferences.
"""
aggregate_status = build_calendar_aggregate()
if aggregate_status == -1:
logger.error(f'Could not build user aggregate for request: {request}')
return ko(jsonify(dict(error='cannot build user aggregate')))
if not (str(user_id) in aggregate_status.keys()):
return not_found(jsonify(dict(error='invalid user')))
data = request.get_json()
if validate_global_preferences(data): # checks the request payload is correctly formed
event = GlobalPreferencesModifiedEvent(user_id=user_id, preferences=data)
session = EventStoreSession()
try:
# both of these are wrapped inside a unique try catch because this must be an atomic operation.
CalendarEvent.append_event(event)
event_published = publish_event(get_sending_channel(), event, PREFERENCES_MODIFIED)
if not event_published:
logger.error(f'Could not publish event on event bus for request: {request}')
session.rollback()
return ko(jsonify(dict(error='could not publish event on event bus')))
else:
session.commit()
logger.info(f'Modified global preferences of user with id: {user_id}')
return ok(jsonify(dict(id=user_id)))
except SQLAlchemyError:
session.rollback()
logger.error(f'Could not append to event store for request: {request}')
return ko(jsonify(dict(error='could not append to event store')))
finally:
session.close()
return bad_request(jsonify(dict(error='invalid data')))
def handle_get_schedule(user_id):
"""
This query endpoint returns the user schedule.
:return: a json object with the list of all the recurrences in the user schedule on a 200 response status code.
"""
recurrences_and_names = get_schedule(user_id)
response = dict(recurrences=[])
for recurrence, name in recurrences_and_names:
response['recurrences'].append(
dict(user_id=user_id,
calendar_id=recurrence.calendar_id,
event_id=recurrence.event_id,
id=recurrence.id,
start_time=strftime(recurrence.start_time),
end_time=strftime(recurrence.end_time),
event_name=name))
return ok(jsonify(response))
def handle_delete(user_id):
"""
Delete user endpoint. It deletes a user resource.
"""
aggregate_status = build_user_aggregate()
if aggregate_status == -1:
logger.error(f'Could not build user aggregate for request: {request}')
return ko(jsonify(dict(error='cannot build user aggregate')))
if not (str(user_id) in aggregate_status.keys()):
return not_found(jsonify(dict(error='invalid user')))
event = UserDeletedEvent(id=user_id)
session = EventStoreSession()
try:
UserEvent.append_event(event)
event_published = publish_event(get_sending_channel(), event,
USER_DELETED)
if not event_published:
logger.error(
f'Could not publish event on event bus for request: {request}')
session.rollback()
return ko(
jsonify(dict(error='could not publish event on event bus')))
else:
session.commit()
logger.info(f'Deleted user with id: {user_id}')
return ok(jsonify(dict(id=user_id)))
except SQLAlchemyError:
session.rollback()
logger.error(f'Could not append to event store for request: {request}')
return ko(jsonify(dict(error='could not append to event store')))
finally:
session.close()
def handle_get_all_calendar_events(user_id, calendar_id):
"""
This query endpoint returns all the events of a user calendar.
:return: a json object listing all the events in the user calendar on a 200 response status code.
"""
cal_id = get_user_calendar_id(user_id, calendar_id)
if not cal_id:
return not_found(jsonify(dict(error='Calendar not found')))
events = get_all_calendar_events(user_id, calendar_id)
response = {}
for event, event_recurrences in events:
response[str(event.id)] = dict(
name=event.name,
location=event.location,
start_time=strftime(event.start_time),
end_time=strftime(event.end_time),
next_is_base=event.next_is_base,
recurrence_rule=event.recurrence_rule.value,
until=strftime(event.until),
flex=event.flex,
flex_duration=event.flex_duration,
recurrences=dict()
)
for recurrence in event_recurrences:
response[str(event.id)]['recurrences'].update(
{
str(recurrence.id): dict(
start_time=strftime(recurrence.start_time),
end_time=strftime(recurrence.end_time)
)
}
)
return ok(jsonify(response))
def handle_get_all_calendars(user_id):
"""
This query endpoint returns all the calendars of a given user.
:return: a json object with a list of all the calendars on a 200 response status code.
"""
if not (get_user_global_preferences(user_id)):
return not_found(jsonify(dict(error='User not found')))
calendars = get_all_user_calendars(user_id)
response = dict(calendars=[])
for calendar in calendars:
response['calendars'].append(
dict(id=calendar.id,
name=calendar.name,
description=calendar.description,
base=calendar.base,
color=calendar.color,
active=calendar.active,
carbon=calendar.carbon,
preferences=calendar.preferences))
return ok(jsonify(response))
def handle_get_calendar(user_id, id):
"""
This query endpoint return a calendar of a given user.
:return: a json object with the calendar info on a 200 response status code.
"""
if not (get_user_global_preferences(user_id)):
return not_found(jsonify(dict(error='User not found')))
calendar = get_calendar(user_id, id)
if calendar:
response = dict(name=calendar.name,
description=calendar.description,
base=calendar.base,
color=calendar.color,
active=calendar.active,
carbon=calendar.carbon,
preferences=calendar.preferences)
return ok(jsonify(response))
return not_found(jsonify(dict(error='Calendar not found')))
def handle_modify(user_id, id):
"""
Calendar modify endpoint. It modifies a calendar resource.
"""
data = request.get_json()
aggregate_status = build_calendar_aggregate()
if aggregate_status == -1:
logger.error(
f'Could not build calendar aggregate for request: {request}')
return ko(jsonify(dict(error='cannot build calendar aggregate')))
if not (str(user_id) in aggregate_status.keys()):
return not_found(jsonify(dict(error='invalid user')))
if not (str(id) in aggregate_status[str(user_id)]['calendars'].keys()):
return not_found(jsonify(dict(error='invalid calendar')))
user_global_preferences = aggregate_status[str(user_id)]['preferences']
# validate the request payload and check if the preferences are applicable given the global one
# in the current aggregate status
if validate_calendar_data(data) and validate_calendar_preferences(
data['preferences'], user_global_preferences):
user_calendars = aggregate_status[str(user_id)]['calendars']
user_calendars.pop(str(id)) # pop for preserving idempotency
if data['name'] in ((value['name']
for value in user_calendars.values())):
return bad_request(jsonify(dict(error='invalid data')))
data['user_id'] = user_id
data['id'] = id
event = CalendarModifiedEvent(**data)
session = EventStoreSession()
try:
# both of these are wrapped inside a unique try catch because this must be an atomic operation.
CalendarEvent.append_event(event)
event_published = publish_event(get_sending_channel(), event,
CALENDAR_MODIFIED)
if not event_published:
logger.error(
f'Could not publish event on event bus for request: {request}'
)
session.rollback()
return ko(
jsonify(
dict(error='could not publish event on event bus')))
else:
session.commit()
logger.info(
f'Modified calendar for user {user_id} with id: {id}')
return ok(jsonify(dict(user_id=user_id, id=id)))
except SQLAlchemyError:
session.rollback()
logger.error(
f'Could not append to event store for request: {request}')
return ko(jsonify(dict(error='could not append to event store')))
finally:
session.close()
return bad_request(jsonify(dict(error='invalid data')))
def handle_recurrence_delete(user_id, calendar_id, event_id, id):
"""
This endpoint deletes a recurrence of an event.
"""
aggregate_status = build_event_aggregate()
if aggregate_status == -1:
logger.error(
f'Could not build calendar aggregate for request: {request}')
return ko(jsonify(dict(error='cannot build calendar aggregate')))
if not (str(user_id) in aggregate_status.keys()):
return not_found(jsonify(dict(error='invalid user')))
if not (str(calendar_id)
in aggregate_status[str(user_id)]['calendars'].keys()):
return not_found(jsonify(dict(error='invalid calendar')))
if not (str(event_id) in aggregate_status[str(user_id)]['calendars'][str(
calendar_id)]['events'].keys()):
return not_found(jsonify(dict(error='invalid event')))
if not (str(id) in aggregate_status[str(user_id)]['calendars'][str(
calendar_id)]['events'][str(event_id)]['recurrences'].keys()):
return not_found(jsonify(dict(error='invalid recurrence')))
data = dict()
data['user_id'] = user_id
data['calendar_id'] = calendar_id
data['event_id'] = event_id
data['id'] = id
event = RecurrenceDeletedEvent(**data)
session = EventStoreSession()
try:
# both of these are wrapped inside a unique try catch because this must be an atomic operation.
EventEvent.append_event(event)
event_published = publish_event(get_sending_channel(), event,
RECURRENCE_DELETED)
if not event_published:
logger.error(
f'Could not publish event on event bus for request: {request}')
session.rollback()
return ko(
jsonify(dict(error='could not publish event on event bus')))
else:
session.commit()
logger.info(
f'Deleted reccurece for user {user_id} on calendar id {calendar_id} on event id {event_id} with id {id}'
)
return ok(
jsonify(dict(user_id=user_id, calendar_id=calendar_id, id=id)))
except SQLAlchemyError:
session.rollback()
logger.error(f'Could not append to event store for request: {request}')
return ko(jsonify(dict(error='could not append to event store')))
finally:
session.close()
def handle_modify(user_id, calendar_id, id):
"""
This endpoint modifies an event resource.
"""
data = request.get_json()
aggregate_status = build_event_aggregate()
if aggregate_status == -1:
logger.error(
f'Could not build calendar aggregate for request: {request}')
return ko(jsonify(dict(error='cannot build calendar aggregate')))
if not (str(user_id) in aggregate_status.keys()):
return not_found(jsonify(dict(error='invalid user')))
if not (str(calendar_id)
in aggregate_status[str(user_id)]['calendars'].keys()):
return not_found(jsonify(dict(error='invalid calendar')))
if not (str(id) in aggregate_status[str(user_id)]['calendars'][str(
calendar_id)]['events'].keys()):
return not_found(jsonify(dict(error='invalid event')))
aggregate_status[str(user_id)]['calendars'][str(
calendar_id)]['events'].pop(str(id))
user_schedule = aggregate_status[str(user_id)]['calendars']
if validate_event(data) and event_can_be_inserted(data, user_schedule):
if 'until' not in data:
data['until'] = None
if 'flex' not in data:
data['flex'] = None
data['flex_duration'] = None
data['user_id'] = user_id
data['calendar_id'] = calendar_id
data['id'] = id
event = EventModifiedEvent(**data)
session = EventStoreSession()
try:
# both of these are wrapped inside a unique try catch because this must be an atomic operation.
EventEvent.append_event(event)
event_published = publish_event(get_sending_channel(), event,
EVENT_MODIFIED)
if not event_published:
logger.error(
f'Could not publish event on event bus for request: {request}'
)
session.rollback()
return ko(
jsonify(
dict(error='could not publish event on event bus')))
else:
session.commit()
logger.info(
f'Modified event for user {user_id} on calendar id {calendar_id} with id {id}'
)
return ok(
jsonify(
dict(user_id=user_id, calendar_id=calendar_id, id=id)))
except SQLAlchemyError:
session.rollback()
logger.error(
f'Could not append to event store for request: {request}')
return ko(jsonify(dict(error='could not append to event store')))
finally:
session.close()
return bad_request(jsonify(dict(error='invalid data')))
