Merge pull request #35 from ajaynegi45/project_structure

Added UML Diagram

ProjectStructure/ER-Diagram.md

@@ -0,0 +1,115 @@
+[//]: # (# ER Diagram)
+
+[//]: # ()
+[//]: # (```mermaid)
+
+[//]: # (erDiagram)
+
+[//]: # (    BOOKS {)
+
+[//]: # (        int book_id PK)
+
+[//]: # (        string title)
+
+[//]: # (        string author)
+
+[//]: # (        string isbn)
+
+[//]: # (        string publisher)
+
+[//]: # (        int published_year)
+
+[//]: # (        string genre)
+
+[//]: # (        int copies_available)
+
+[//]: # (    })
+
+[//]: # ()
+[//]: # (    BORROWINGS {)
+
+[//]: # (        int borrowing_id PK)
+
+[//]: # (        int book_id FK)
+
+[//]: # (        int fine_id FK)
+
+[//]: # (        int member_id FK)
+
+[//]: # (        date borrow_date)
+
+[//]: # (        date due_date)
+
+[//]: # (        date return_date)
+
+[//]: # (    })
+
+[//]: # ()
+[//]: # (    FINES {)
+
+[//]: # (        int fine_id PK)
+
+[//]: # (        int borrowing_id FK)
+
+[//]: # (        int member_id FK)
+
+[//]: # (        decimal amount)
+
+[//]: # (        boolean paid)
+
+[//]: # (    })
+
+[//]: # ()
+[//]: # (    MEMBERS {)
+
+[//]: # (        int member_id PK)
+
+[//]: # (        string name)
+
+[//]: # (        string email)
+
+[//]: # (        string password)
+
+[//]: # (        enum role)
+
+[//]: # (        date membership_date)
+
+[//]: # (    })
+
+[//]: # ()
+[//]: # (    NOTIFICATIONS {)
+
+[//]: # (        int notification_id PK)
+
+[//]: # (        int member_id FK)
+
+[//]: # (        string message)
+
+[//]: # (        enum notification_type)
+
+[//]: # (        timestamp sent_date)
+
+[//]: # (        string status)
+
+[//]: # (    })
+
+[//]: # ()
+[//]: # (    MEMBERS ||--o{ BORROWINGS : has)
+
+[//]: # (    BOOKS ||--o{ BORROWINGS : has)
+
+[//]: # (    BORROWINGS ||--|{ FINES : generates)
+
+[//]: # (    MEMBERS ||--o{ FINES : receives)
+
+[//]: # (    MEMBERS ||--o{ NOTIFICATIONS : receives)
+
+[//]: # ()
+[//]: # (%% ||--o{: One-to-Many relationship.)
+
+[//]: # (%% ||--|{: One-to-One relationship.)
+
+[//]: # ()
+[//]: # (```)
+
+<img width="247" alt="Screenshot 2024-08-29 at 12 34 48 AM" src="https://github.com/user-attachments/assets/82d824ca-82fd-4e6b-be85-fd95199664a2">