CRC Cards (Part 2)

User

Responsibilities	Collaborators
Base class for users
Admin field is true if admin, false if not
Contains user profile data

Administrator

Responsibilities	Collaborators
Extends user class with admin permissions

UserController

Responsibilities	Collaborators
Adds a User to the list of users and updates UserDB and

UserProfile

Responsibilities	Collaborators
Manage user profile information	User
Upload, update, and remove profile pictures	User
Generate deterministic profile images	User
Allow users to update contact information	User

UserDB

Responsibilities	Collaborators
Update the values of a user in the Firebase Firestore database	UserController
Read the values of a user in the Firebase Firestore database	UserDBConnector
Delete a User in the firebase firebase database	User

UserDBConnector

Responsibilities	Collaborators
Connects to the Firebase Firestore database	UserDB

UserDBController

Responsibilities	Collaborators
Adds a User to the FireStore UserDB	UserDB

Attendee

Responsibilities	Collaborators
Extends user class
Contains one event
Can check in at event

Organizer

Responsibilities	Collaborators
Extends user class
Contains one event
Can manage the event

Event

Responsibilities	Collaborators
Manage event details	EventDetails
Track registered attendees	AttendanceTracker
Provide event-specific QR codes	QRCodeGenerator
Manage schedules (sessions, speakers, timings)	Schedule
Hold venue information	Venue
Control access based on user permissions	User
Send notifications to attendees and organizers	NotificationService
Handle event registration and deregistration	User
Generate reports for organizers and admins	ReportGenerator
Upload and manage event posters	EventPoster
Track and display check-in locations on a map	GeolocationService
Allow organizers to share QR code images to other apps	QRCodeGenerator
Generate unique promotion QR codes linking to event details	QRCodeGenerator, EventPoster

EventDB

Responsibilities	Collaborators
Update the values of an Event in the Firebase Firestore database	EventDBConnector
Read the values of an Event in the Firebase Firestore database	Event
Delete an Event in the firebase firebase database

EventDBConnector

Responsibilities	Collaborators
Connects to the Firebase Firestore database	EventDB

QRCodeGenerator

Responsibilities	Collaborators
Generate unique QR codes for events	Event
Allow reuse of existing QR codes for events	Event
Generate promotion QR codes linking to event details	Event

NotificationService

Responsibilities	Collaborators
Send notifications to attendees	User, Event
Manage subscription to notifications	User
Handle push notifications for updates	User, Event

AttendanceTracker

Responsibilities	Collaborators
Track real-time attendance at events	Event, User
Alert organizers about attendance milestones	Event, NotificationService
Maintain historical attendance data	Event, User

GeolocationService

Responsibilities	Collaborators
Track geolocation data for event check-ins	User, Event
Provide geolocation-based event verification	User, Event
Display map of user check-ins for organizers	Event, User

AdminControl

Responsibilities	Collaborators
Remove events, profiles, and images	Event, UserProfile, EventPoster
Browse events, profiles, and images	Event, UserProfile, EventPoster

EventDetails

Responsibilities	Collaborators
Provide event details and announcements	Event, NotificationService
Manage updates to event information	Event

EventsDB

Responsibilities	Collaborators
store event objects into firebase database	EventsBDconnector
updates event objects into firebase database	events
deletes event objects into firebase database

Images

Responsibilities	Collaborators
Store URLs to all images present in the app	Administrator