@startuml Export_Log

    participant OS                  as OS
    participant Script              as Script
    participant USB                 as USB
    participant SW                  as SW
    participant UI                  as UI
    actor       USER                as US

    'Possible actions and interaction types
    ' External on CANBus
    ' TD -> SW: MSG: Message
    ' SW -> TD: MSG: Message

    ' Internal to the application
    ' XX -> YY: CMD: Command
    ' XX -> XX: ACT: Action

    ' External on OS/FS
    ' SW -> USB: ACT: Command
    ' SW -> Script: ACT: Command
    ' Script -> OS: CMD: Command
    ' Script -> SW: MSG: Message
    ' OS -> Script: MSG: Message

    ' US -> UI: User actions are:
    '   ASK: Display a <message>
    '   ENT: User enters a value or string
    '   TCH: User touches a button (RadioButton, CheckBox, ...)
    '   SCL: User scrolls a flip-able area

    == Export Logs Selection ==
    group  Export Logs Selection
        US -> UI: TCH: Settings Menu
        UI -> UI: ACT: Device Settings Screen
        US -> UI: TCH: Export Log Button
        UI -> UI: ACT: Export Log Settings Screen
        US -> UI: TCH: Log Type ComboBox
        US -> UI: SCL: User scrolls list and select log type
        alt Select individual Files
            US -> UI: SCL: User scrolls flip-able area for SD-Card file
            US -> UI: TCH: User selects which file(s) to export
        end

        US -> UI: TCH: Export Button
        UI -> UI: ACT: Export Status Indicator (in progress)
        UI -> SW: ACT: Export selected log type\n(Application, Service, Treatment) files

        alt Export Application, Service, Treatment Log(s)
            SW -> USB: Copy file by file to external storage
            SW -> SW: ACT: Log and display status of export result
        end
    end

    == Eject USB ==
    group  Eject USB
        US -> UI: TCH: Eject USB Button
        UI -> SW: ACT: Request Unmount USB
        SW -> Script: ACT: usb_unmount.sh ( )
        activate Script
            Script -> OS: CMD: sudo umount "$USB_FOLDER"
            Script -> SW: MSG: exit #
        deactivate Script
    end
@enduml