namespace dev
import std::str::StringBounds

settings {
    indexed-all=false
    allow-debugging=true
}


@affects=[struct protocol]
settings MailSettings {
    indexed=true
}


@settings=MailSettings
struct Mail {
    1# sender: str
    2# recipient: str
}

struct Article {
    @validators=[StringBounds(min_chars=3 max_chars=32]
    title: str

    @validators=[StringBounds(min_chars=24 max_chars=412]
    content: str
}

@hidden
@settings=MailSettings
protocol Mail {
    async function send(mail: Mail)
}


// Maximum amount of articles that a provider can send
const SENT_ARTICLES_MAX: u8 = 10

protocol Feed {
    // Fetches new articles since last fetch
    @flexible async stream
    #timeout=1000ms per_send_timeout=10s cooldown=10s
    function fetch_articles() -> Article[SENT_ARTICLES_MAX]
}