remote-control-pairing.plantuml

@startuml
title "Remote Control Pairing"
actor User
participant "Smartphone"
participant "SoundOnFire"
participant "Serverless Function"
participant "Remote Control Web App"

User -> "SoundOnFire": Open remote control pairing
activate "SoundOnFire"
    "SoundOnFire" -> "Serverless Function": Post generated device ID
        activate "Serverless Function"
        "Serverless Function" -> "Serverless Function": Cache device ID
        return Remote control pairing redirect URL 
    "SoundOnFire" -> "SoundOnFire": Show QR-Code using pairing redirect URL
    "SoundOnFire" -> "Serverless Function": Polls pairing status
    activate "Serverless Function"
    return Pairing incomplete
    "SoundOnFire" -> "Serverless Function": ...
    activate "Serverless Function"
    return ...
    
    "User" -> "Smartphone": Uses Smartphone to scan QR-Code
    activate "Smartphone"
    "Smartphone" -> "SoundOnFire": Scan QR-Code
    "SoundOnFire" -> "Smartphone": Remote control pairing redirect URL
        "Smartphone" -> "Smartphone": Open remote control pairing URL
        "Smartphone" -> "Serverless Function": Complete remote control pairing
        activate "Serverless Function"
        return Redirect to remote control web app
    "SoundOnFire" -> "Serverless Function": Polls pairing status
        activate "Serverless Function"
        return Confirm pairing status
        deactivate "SoundOnFire"
        "Smartphone" -> "Remote Control Web App": Open remote control web app

@enduml