Use Case Diagram: Social Media System

Actors:
  • Registered User
  • Administrator
  • Guest User
  • External Authentication Provider
  • Notification Service
  • Messaging Server

Use Cases:

User Registration

  • Description: The guest user can sign up and create an account.
  • Actor(s): Guest User

 

Login

  • Description: The registered user logs in to the system, either through direct login or third-party authentication.
  • Actor(s): Registered User, External Authentication Provider

 

Create/Manage Profile

  • Description: The user can update their profile information, including pictures, bio, and visibility settings.
  • Actor(s): Registered User

 

Post Content

  • Description: The user can create posts including text, images, or videos.
  • Actor(s): Registered User

 

Like, Comment, and Share

  • Description: Users can interact with posts by liking, commenting, and sharing them.
  • Actor(s): Registered User

 

Follow Users

  • Description: Users can follow or unfollow other users to see their posts on the feed.
  • Actor(s): Registered User

 

Send Direct Message

  • Description: The user can send private messages to other users.
  • Actor(s): Registered User

 

Receive Notifications

  • Description: The user will receive notifications about interactions like likes, comments, new followers, or messages.
  • Actor(s): Registered User, Notification Service

 

View Public Content

  • Description: Guest users can view publicly available posts or profiles.
  • Actor(s): Guest User

 

Moderate Content

  • Description: Administrators can review and remove inappropriate or reported content.
  • Actor(s): Administrator

 

Manage Banned Users

  • Description: Administrators can ban or unblock users who violate platform rules.
  • Actor(s): Administrator

 

Authenticate User

  • Description: The external authentication provider helps verify user credentials during login.
  • Actor(s): External Authentication Provider

 

Push Notifications

  • Description: The notification service sends notifications to users for different events like interactions or updates.
  • Actor(s): Notification Service

 

Real-Time Messaging

  • Description: The messaging server handles communication between users in real time.
  • Actor(s): Messaging Server

Diagram Overview:

  • The Registered User interacts with many use cases: Create/Manage Profile, Post Content, Like/Comment/Share, Follow Users, Send Direct Message, and Receive Notifications.
  • The Guest User can only access View Public Content and User Registration.
  • The Administrator handles the Moderate Content and Manage Banned Users use cases.
  • The External Authentication Provider assists with Authenticate User during the login process.
  • The Notification Service is responsible for Push Notifications sent to the user based on certain events.
  • The Messaging Server enables Real-Time Messaging for users.
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