Usecase

Approve or Disapprove Trip Application

participant "«actor»\nTravel Coordinator" as TC
participant "«boundary»\nUI" as UI
participant "«controller»\nTFS" as TFS
note left of TFS 
        Travel Forms System 
        (administrative backend)
    end note
participant "«actor»\nDatabase" as DB
participant "«actor»\nTraveller" as T


TC->UI: Log in credentials
activate TC
activate UI

UI->TFS: authenticate(credentials)
activate TFS
TFS-->UI: Authentication Success
UI-->TC: Authentication Success


TC->UI: selectTripApplication()

UI->TFS: retrieveTripApplication()
TFS-->UI: trip application

UI-->TC: selectTripApplication

loop check status
  TC->UI: setApprovalStatus(TravelDiary,status)
   TC->UI: setComment(TravelDiary)
   TC->UI: setApprovalStatus(AbsenceOnDuty,status)
    TC->UI: setComment(AbsenceOnDuty)
    TC->UI: setApprovalStatus(TravelBudget,status)
   TC->UI: setComment(TravelBudget)
  TC->UI: saveApproval()
   UI -> UI: package = \ncreatePackage

  UI -> TFS: setApplicationPackage(package)
end 

UI->TFS: updateTravelDiary(status,comment)
TFS-->UI: TravelDiaryStatus
TFS-->UI: TravelDiaryComment

UI->DB : UpdateTravelDiary()
activate DB

UI->TFS: updateAbsenceOnDuty(status,comment)
TFS-->UI: AbsenceOnDutyStatus
TFS-->UI: AbsenceOnDutyComment
UI->DB : UpdateAbsenceOnDuty()

UI->TFS: updateTravelBudget(status,comment)
TFS-->UI: TravelBudgetStatus
TFS-->UI: TravelBudgetComment
UI->DB : UpdateTravelBudget()
deactivate DB


TFS->UI: notifyResult()
UI-->TC: notifyResult

TC->UI : notify()
UI->T:notifyTraveller()

TC->UI: Log out
UI->TFS: logout()
TFS-->UI: logout
deactivate TFS
UI-->TC: logout success
deactivate UI
deactivate TC

Complete Application

participant "«actor»\nTraveller" as T
participant "«boundary»\nUI" as UI
participant "«controller»\nTFS" as TFS
participant "«entity»\nAbsence on Duty" as AoD
participant "«entity»\nTravel Budget" as TB
participant "«entity»\nTravel Diary" as TD
participant "«entity»\nChecklist" as CL
participant "«actor»\nDatabase" as DB


loop until entire checklist has been processed
T->UI: New Trip Application
activate UI

UI->TFS: create_new_application()
activate TFS

TFS->AoD: instantiate(AoD)
activate AoD
AoD-->TFS: AoD entries
deactivate AoD
TFS->DB : add(AoD entries)

TFS->TB: instantiate(TB)
activate TB
TB-->TFS: TB entries
deactivate TB
TFS->DB: add(TB entries)


TFS->TD: instantiate(TD)
activate TD
TD-->TFS:TD entries
deactivate TD
TFS->DB: add(TD entries)

TFS->CL: intantiate(CL)
activate CL
CL-->TFS: CL entries
deactivate CL
TFS->DB: add(CL entries)

end

opt
 TFS-->UI: forms successfully completed   
 UI-->T: Submission Success Message
else  or
 TFS-->UI: forms incomplete
 deactivate TFS
 UI-->T: Incomplete form or Checklist 
Message   
 deactivate UI
end