PlantUML Web Server

@startuml
title New user

Actor User as user
Participant Bot as bot
Participant Api as api
Participant "Course1 API" as courseapi
Database Postgres as postgres
Database Redis as redis

user -> bot : message ('/start')
bot --> user : Welcome message\nEmail input prompt
user -> bot : message ('email')
bot --> user : Name input prompt
user -> bot : message ('name')
bot -> postgres : insert into user_data
postgres --> bot : OK
bot --> user : Menu\n[Change name]\n[Course1]\n[Course2]

user -> bot : button (Course1)
bot ->> user : message\n('starting lesson pls wait...')
bot -> api : POST ${API_URI}/service/start\n{'email': 'email',\n'course': 'Course1'}
api -> courseapi : POST\n*create environment*
courseapi --> api : OK\n{'env info': 'env info'}
api -> postgres : insert into course1_user
postgres --> api : OK
api --> bot : OK
bot --> user : First lesson

user -> courseapi : Task attempt
courseapi --> user : OK
courseapi -> api : POST ${API_URI}/course1/callback\n{Task attempt data}
api -> postgres : update course1_user
postgres --> api : OK
api -> bot : POST /?\n*next/retry/grades*
bot --> user : message (next/retry/grades)
bot --> api : OK
api --> courseapi : OK
@enduml

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