Domain Modeling - Design Workflow: assign role

[kayac-chang]

implement design of https://hackmd.io/KvV2Ou3HS9uN11OUpsAUzA?both#Workflow-assign-role

[JohnsonMao]

Command

type AssignRoleCommand = {
    playerId: string;
    role: RoleCard;
}

Event

type AssignRoleEvent = {
    playerId: string;
    role: RoleCard;
}

Error

type AssignRoleError = EventSourceWriteError

Type

type AssignRole = (eventsource: EventSource, command: AssignRoleCommand) => ResultAsync<AssignRoleEvent, AssignRoleError>

Workflow

workflow: assign role
    input:
        event source
        assign role command
    output:
        async result of 
            ok -> player assign role event
            err -> assign role error
    step:
        append event to event source
            if error occured:
                return event source write error
            otherwise:
                return assign role event

[kayac-chang]

@JohnsonMao
could you also provide the type of assign role so we can make sure what type interface we have to follow.

[JohnsonMao]

Due to the adjustments in the turn start process, the "assign role" function has been modified as follows.

[kayac-chang]

type AssignRole = (eventsource: EventSource, command: AssignRoleCommand) => ResultAsync<AssignRoleEvent, AssignRoleError>

[JohnsonMao]

To ensure logical validation and further completion, we would need the following additional functions:

• Validate player count
• Calculate role card count by player count
• Randomly assign role cards for all players

Error

type NotEnoughPlayersError = Error & {
    name: 'NotEnoughPlayersError'
    message: 'Not enough players'
}

type ExceededPlayerCountError = Error & {
    name: 'ExceededPlayerCountError'
    message: 'Exceeded player count'
}