useCase.puml

@startuml useCaseDiagram
left to right direction

actor "User" as U
actor "Administrator" as A
actor "Library System" as S

rectangle "Library Management System" {
  ' User Use Cases
  usecase "Register Account" as UC_Reg
  usecase "Search Catalog" as UC_Search
  usecase "Borrow Book" as UC_Borrow
  usecase "Return Book" as UC_Return
  usecase "View Transaction History" as UC_History
  usecase "Pay Fines" as UC_Pay
  usecase "View Profile" as UC_Profile
  
  ' Administrator Use Cases
  usecase "Add Book" as UC_Add
  usecase "Remove Book" as UC_Rem
  usecase "Edit Book" as UC_Edit
  usecase "Generate Inventory Report" as UC_InvRep
  usecase "Generate User Report" as UC_UserRep
  usecase "Generate Overdue Report" as UC_OverdueRep
  usecase "Generate Transaction Report" as UC_TxnRep

  ' System Use Cases
  usecase "Send Overdue Notifications" as UC_Notify
  usecase "Load/Save File Database" as UC_Persist
}

' User interactions
U --> UC_Reg
U --> UC_Search
U --> UC_Borrow
U --> UC_Return
U --> UC_History
U --> UC_Pay
U --> UC_Profile

' Administrator interactions
A --> UC_Add
A --> UC_Rem
A --> UC_Edit
A --> UC_InvRep
A --> UC_UserRep
A --> UC_OverdueRep
A --> UC_TxnRep

' System interactions
S --> UC_Notify
S --> UC_Persist

' Relationships
UC_Return ....> UC_Pay : <<extend>> (If Overdue)
@enduml