Project Part 2: CRC Cards

Player

Responsibilities	Collaborators
Keeps a unique username of the Player	QRCode
Keeps a score of the Player
Keeps a Player's avatar as an image
Keeps total QR codes scanned by the Player
Keeps list of QRCodes a user has scanned

Responsibilities	Collaborators
Displays a list of QR codes a user has scanned (name and photo of location if applicable)	Player
Allow users to select a QR code and go to QRCodeActivity	QRCode
Displays the player's highest and lowest scores (through queries from PlayerController)	PlayerController
Displays the player's username and their avatar
Displays buttons that allow the user to navigate to other pages

Responsibilities	Collaborators
Creates a new Player with a username, score (initially 0), avatar, number of QRCodes scanned (initially 0), and a list of QRCodes scanned (initially empty) in the Firebase Firestore database	PlayerController
Reads the values of a Player in the Firebase Firestore database	PlayerDBConnector
Updates the values of a Player in the Firebase Firestore database	Player
Deletes a Player from the Firebase Firestore database

Responsibilities	Collaborators
Connects to the Firebase Firestore database	PlayerDB

Responsibilities	Collaborators
Keeps a list of players	PlayerDB
Add a player to the list of players and updates PlayerDB to reflect the changes	PlayerActivity
Updates PlayerDB by editing a Player	Player
Delete a player from the list of players and updates PlayerDB to reflect the changes
Provides LeaderboardActivity with a list of all players queried from PlayerDB
Sorts the list of players by total score