Object-Oriented Analysis (CRC Cards)

This page has the CRC (Class–Responsibility–Collaborator) cards for the application as part of the deliverables for the part 2 milestone.

Each CRC card has the following:

• Class: name that represents a class in Java
• Responsibilities: what the class should do
• Collaborators: what other classes it interacts with

Each card is listed below in a tabular format:

Event

Responsibilities	Collaborators
Store information about what it is such as event name, location, time, max entrants, poster, signup deadline	Entrant
Be updatable by its organizer	Organizer
Associated with an event identifier for QR code scanning	Admin
	EventsDatabaseCollector

Profile

Responsibilities	Collaborators
Store information such as first name, last name, email, phone number	Entrant
Associated with a Android device identifier	Organizer
Contains the event history	Admin
	ProfileDatabaseCollector

Entrant

Responsibilities	Collaborators
Join or leave a waitlist for an event	Profile
Accept or decline invitations for an event	Event
Put in personal information to create profile	Waitlist
Delete profile
Opt out of notifications

Notification

Responsibilities	Collaborators
Store the notification content such as title, message, recipient, and event	Organizer
Don't display for entrants who have disabled notifications	Event
	Admin
	Entrant
	NotificatonsDatabaseCollector

Admin

Responsibilities	Collaborators
View and delete events	Profile
View and delete images	Event
View and delete profiles	Notification
View notification logs	Organizer

Organizer

Responsibilities	Collaborators
Create and update an event	Event
Send notifications	Notification
Generate a QR code for event	Profile
Export entrants as a CSV	Geolocation
Limit number of entrants optionally to a waitlist
Enable or disable geolocation verification
Optionally upload an image poster
Prompt the system to begin pooling process

Geolocation

Responsibilities	Collaborators
Store the information about the location of a user's device	Event
	Device
	Profile

PoolingSystem

Responsibilities	Collaborators
Randomly select entrants from a waitlist	Entrant
Draw replacement applicant for canceled entrants upon request	Organizer
	Waitlist

Waitlist

Responsibilities	Collaborators
Stores the list of entrants on the waitlist	Event
	Entrant
	PoolingSystem

Device

Responsibilities	Collaborators
Provide the Android device identifier	Event
Provide the geolocation of the device	Geolocation

EventsDatabaseConnector

Responsibilities	Collaborators
Update, delete and fetch data relating to Events	Events

NotificationsDatabaseConnector

Responsibilities	Collaborators
Update, delete and fetch data relating to Notifications in real time	Notification

ProfilesDatabaseConnector

Responsibilities	Collaborators
Update, delete and fetch data relating to profiles	Profiles

EventsCollection

Responsibilities	Collaborators
Stores a list of events	Event
Sort, filter and search through events list according to set criteria	EventsDatabaseCollection