# Layout flow
This diagram shows the different layouts that should be shown to the user, and which internal messages that cause transitions between them.

@startuml
hide empty description
state ConnectionAvailable #lightgreen
state ScanQrCode #lightgreen {
 ScanQrCode: Also includes app etc.\n(B1)
}
state Authenticating #lightgreen {
	Authenticating: Charging station controller does this\n(B1)
}
state NoAccess #yellow
state Preparing #lightblue {
	Preparing: EVSEC::StartCharging\n(Bx)
}
state Charging #lightblue {
	Charging: Relays closed (C2)
}
state ChargingPaused #lightblue {
	ChargingPaused: Relays open\n(Bx or C1)
}
state EcoModeCharging #lightgrey
state ChargingEnded #lightgreen
state Error #red

[*] --> ConnectionAvailable: ChargingStationController in idle? B01 / setup complete?
ConnectionAvailable --> ScanQrCode: EVSEC::EVPluggedIn
ConnectionAvailable -[#red,bold]-> Authenticating
note on link
	NFC::NFCTag before EvPluggedIn?
end note
ScanQrCode --> Authenticating: NFC::NFCTag
Authenticating --> Preparing: CSC::<<Authentication successful>>
Authenticating --> NoAccess: CSC::<<Authentication failed>>
NoAccess --> ScanQrCode: After 3 sec
Preparing --> Charging: EVSEC::PowerPathClosed
Charging --> ChargingPaused: EVSEC::PowerPathOpen
Charging --> ChargingEnded: EVSEC::EVUnplugged \nOR De-authorized
ChargingPaused --> Charging: EVSEC::PowerPathClosed
ChargingPaused --> ChargingEnded: EVSEC::EVUnplugged
ChargingEnded -up-> ConnectionAvailable: After 15 sec
@enduml

CSC: ChargingStationController
EVSEC: EvseController

## Questions
- What happens when "de-authorization" happens during charging? (RFID-/NFC swipe)?
- Should authentication be possible before EvPlugin?

## ConnectionAvailable
## ScanQrCode
Right after plugin

## Authenticating
## NoAccess
## Initializing
## Charging
## EcoModeCharging
Not supported for first release

## ChargingPaused
## ChargingEnded
## Error