design_class_diagram_system.uml

@startuml
title Design Class Diagram - System

abstract class User {
    +userID : int
    +username : str
    +password : str
    +email : str
    +status : UserStatus
    +changePassword()
    +recoverPassword()
    +ban()
}

User .r. UserStatus

enum UserStatus{
    Active
    Suspended
    Banned
}


class PageAdmin {
    +resolveTicket()
    +manageSystem()
    +manageTechCategories()
}



class Notification {
    +notificationID : int
    +message : str
    +type : NotificationType
    +timestamp : datetime
    +send()
}

class Chat {
    +chatID : int
    +participants : list[User]
    +creationDate : datetime
    +sendMessage()
    +markAsRead()
    +addParticipant()
    +removeParticipant()
}

class Message {
    +messageID : int
    +content : str 
    +timestamp : datetime
    +senderID : int
    +isRead : bool
    +send()
    +markAsRead()
    +delete()
}

class Inbox {
    +inboxID : int
    +userID : int
    +getChats()
    +getUnreadMessages()
    +markAllAsRead()
}


class Ticket {
    +ticketID : int
    +category : TicketCategory
    +description : str
    +urgencyLevel : int
    +status : TicketStatus
    +submit()
} 
note right
    Users may flag tickets as urgent 
    if they deem it approporiate
end note

class TicketQueue {
    +queueID : int
    +name : str
    +addTicket()
    +removeTicket()
    +getNextTicket()
    +getAllTickets()
}


abstract class Dashboard {
    +refreshData()
    +displayMetrics()
}

class AdminDashboard{
    +queue : TicketQueue
}


enum TicketCategory{
    User Moderation
    Content Moderation
    Verification Issue
    Bug Report
    Performance Alerts
    Integration Issue

}

enum TicketStatus {
    Submitted
    InReview
    Closed
}

class UserDashboard {
    +impactMetrics
    +activeOpportunities
    +completedOpportunities
    +showOpportunity()
}
note bottom
    UserDashboard is populated dynamically 
    with active opportunities & stats
end note

class UserSession {
    +sessionID : int
    +startTime : datetime
    +lastActiveTime : datetime
    +isActive : bool
    +login()
    +logout()
    +validateSession()
    +refreshSession()
    +trackActivity()
}

User <|-- PageAdmin
User <|-- Volunteer
User <|-- Organiser


UserDashboard -|> Dashboard
AdminDashboard -u|> Dashboard

User "1" -- "0..*" UserSession : "maintains >"

User "1" .. "1" UserDashboard : "views >"

Dashboard "1" .d. "1" Inbox : "has >"
Inbox "1" o.. "0..*" Chat : "displays >"
Chat "1" o.d. "0..*" Message : "contains >"

Ticket "0..*" --> "1" TicketStatus
Ticket "0..*" --> "1" TicketCategory

TicketQueue "1" o- "0..*" Ticket : contains >

AdminDashboard .. TicketQueue : "< shown on"

Ticket "0..*" .u. "0..*" User : "< submits"
TicketQueue .. PageAdmin : "< manages"
PageAdmin "0..*" --> "0..*" Ticket : "resolves >"

Notification .r. User : "< alerted by"
@enduml