Entitites:

1. User
2. Message
3. Conversation

In the entity Message we have:

• User: Who create the message
• Content: Content of message
• Conversation: Conversation to whom the message belongs
• Conversations: Mapped By the field lastMessage in the conversation entity, so a conversation can have one lastMessage and Message can be the lastMessage of 2 conversations or more.

In the entity User we have:

• Data: Name, Email, Passwoed, Enabled, Picture, ConfirmationToken and Roles
• Messages: The messages of the user
• Conversations: Where the user participates

In the entity Conversation we have:

• Users: The participants of the conversation
• LastMessage: The last message of the conversation
• Messages: The messages of the conversation
• OwnerId: Who created the conversation

Controllers:

1. HomeController: Render the home page with $response->setCookie($userCookie);
2. SecurityController: Login, logout and reset passsword functionnalities.
3. RegistrationController: Register the use and send email to verify the account.
4. UsersController: Get all users.
5. MessageController.
6. ConversationController.

In the ConversationController we have:

CERT BOOT