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https://github.com/aaronpo97/the-biergarten-app.git
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95 lines
3.1 KiB
Plaintext
95 lines
3.1 KiB
Plaintext
@startuml update-username
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!include ../../../pipeline/diagrams/biergarten-weizen-theme.puml
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skinparam sequenceMessageAlign center
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skinparam maxMessageSize 200
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title User Authentication Flow - Update Username
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actor User
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participant "API\nController" as API
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participant "MediatR pipeline\n(ValidationBehavior)" as Mediator
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box "Handler Layer" #F1F3EA
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participant "UpdateUsernameHandler" as UpdateUsernameHandler
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participant "UserManager<ApplicationUser>" as UserMgr
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end box
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box "Repository / Cross-slice" #DBEEDD
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participant "DapperUserStore\n(IUserStore/IUserPasswordStore/\nIUserEmailStore)" as UserStore
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end box
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database "SQL Server" as DB
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note over UserMgr
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ASP.NET Core Identity's UserManager<TUser>
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replaces the deleted AuthRepository: handlers
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no longer issue SQL or call Argon2 directly,
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they delegate to UserManager, which in turn
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calls DapperUserStore (persistence) and
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Argon2PasswordHasher (IPasswordHasher<TUser>).
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end note
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User -> API: PATCH /api/auth/username\n{newUsername}\n(requires Bearer access token)
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activate API
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API -> Mediator: Send(UpdateUsernameCommand(\n GetAuthenticatedUserId(), newUsername))
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activate Mediator
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note right of Mediator
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ValidationBehavior runs UpdateUsernameValidator
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(same format rules as registration)
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end note
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alt Validation fails
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Mediator -> API: throws FluentValidation.ValidationException
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API -> User: 400 Bad Request
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else Validation succeeds
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Mediator -> UpdateUsernameHandler: Handle(command)
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activate UpdateUsernameHandler
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UpdateUsernameHandler -> UserMgr: FindByIdAsync(userAccountId)
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activate UserMgr
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UserMgr -> UserStore: FindByIdAsync(userAccountId)
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activate UserStore
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UserStore -> DB: SELECT ...\nFROM dbo.UserAccount\nWHERE UserAccountID = @Id
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activate DB
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DB --> UserStore: row or null
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deactivate DB
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UserStore --> UserMgr: ApplicationUser or null
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deactivate UserStore
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UserMgr --> UpdateUsernameHandler: ApplicationUser or null
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deactivate UserMgr
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alt Account not found
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UpdateUsernameHandler -> Mediator: throw NotFoundException
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Mediator -> API: propagate
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API -> User: 404 Not Found
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else Account found
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UpdateUsernameHandler -> UserMgr: SetUserNameAsync(user, newUsername)
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activate UserMgr
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UserMgr -> UserStore: FindByNameAsync(newUsername)
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note right of UserMgr
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Uniqueness check before the UPDATE.
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end note
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UserMgr -> UserStore: UpdateAsync(user)
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UserStore -> DB: UPDATE dbo.UserAccount\nSET Username = @UserName, ...
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UserStore --> UserMgr: IdentityResult
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UserMgr --> UpdateUsernameHandler: IdentityResult
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deactivate UserMgr
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alt !result.Succeeded
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UpdateUsernameHandler -> Mediator: throw ConflictException\n(DuplicateUserName code ->\n"Username already exists")
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Mediator -> API: propagate
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API -> User: 409 Conflict
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else result.Succeeded
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UpdateUsernameHandler --> Mediator: UpdateUsernamePayload(\n user.Id, user.UserName)
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deactivate UpdateUsernameHandler
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Mediator --> API: UpdateUsernamePayload
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deactivate Mediator
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API -> User: 200 OK\n{message: "Username updated successfully.",\npayload: {...}}
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end
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end
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end
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deactivate API
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@enduml
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