manabrew-server 0.28.0

const DEFAULT_CAPTURE_MAX_GB: u64 = 20;
/// Fixed rather than ephemeral: a client that learns it from config rather
/// than from mDNS needs it to survive a restart.
const DEFAULT_ART_PORT: u16 = 9528;

const BYTES_PER_GB: u64 = 1024 * 1024 * 1024;

pub struct ServerConfig {
    pub host: String,
    pub port: u16,
    pub health_port: u16,
    pub max_rooms: usize,
    pub server_key: String,
    pub official_key: Option<String>,
    pub events_dir: Option<String>,
    pub capture_dir: Option<String>,
    pub capture_max_gb: u64,
    pub deck_hub_enabled: bool,
    pub hub_deck_plays_url: Option<String>,
    pub hub_deck_plays_token: Option<String>,
    pub hub_jwks_url: Option<String>,
    /// Where this relay keeps card art. Set it and the relay serves
    /// `/scryfall-img/` for everyone on the network, which is the point of
    /// running one: nobody else has to hold 8GB of images.
    pub art_dir: Option<String>,
    pub art_port: u16,
    /// An absolute url, for a deployment behind a proxy where the port this
    /// binds is not the one a client reaches. On a LAN nobody sets this: the
    /// mDNS record already carries the port and the client already knows the
    /// host it connected to.
    pub art_base_url: Option<String>,
    /// Answer mDNS, so four desktops on a network find this box without anyone
    /// typing its address.
    pub lan_advertise: bool,
}

impl ServerConfig {
    pub fn from_env() -> Self {
        ServerConfig {
            host: std::env::var("FORGE_HOST").unwrap_or_else(|_| "0.0.0.0".into()),
            port: std::env::var("FORGE_PORT")
                .ok()
                .and_then(|p| p.parse().ok())
                .unwrap_or(9443),
            health_port: std::env::var("FORGE_HEALTH_PORT")
                .ok()
                .and_then(|p| p.parse().ok())
                .unwrap_or(9444),
            max_rooms: std::env::var("FORGE_MAX_ROOMS")
                .ok()
                .and_then(|r| r.parse().ok())
                .unwrap_or(100),
            server_key: std::env::var("MANABREW_SERVER_KEY").unwrap_or_else(|_| "forge".into()),
            official_key: std::env::var("SECRET_MANABREW_KEY")
                .ok()
                .filter(|key| !key.is_empty()),
            events_dir: std::env::var("MANABREW_EVENTS_DIR")
                .ok()
                .filter(|dir| !dir.is_empty()),
            capture_dir: std::env::var("MANABREW_GAME_CAPTURE_DIR")
                .ok()
                .filter(|dir| !dir.is_empty()),
            capture_max_gb: std::env::var("MANABREW_GAME_CAPTURE_MAX_GB")
                .ok()
                .and_then(|gb| gb.parse().ok())
                .unwrap_or(DEFAULT_CAPTURE_MAX_GB),
            deck_hub_enabled: std::env::var("DECK_HUB").ok().is_some_and(|value| {
                matches!(
                    value.to_ascii_lowercase().as_str(),
                    "1" | "true" | "yes" | "on"
                )
            }),
            hub_deck_plays_url: std::env::var("MANABREW_HUB_DECK_PLAYS_URL")
                .ok()
                .filter(|url| !url.is_empty()),
            hub_deck_plays_token: std::env::var("MANABREW_HUB_DECK_PLAYS_TOKEN")
                .ok()
                .filter(|token| !token.is_empty()),
            hub_jwks_url: std::env::var("MANABREW_HUB_JWKS_URL")
                .ok()
                .filter(|url| !url.is_empty()),
            art_dir: std::env::var("MANABREW_ART_DIR")
                .ok()
                .filter(|dir| !dir.is_empty()),
            art_port: std::env::var("MANABREW_ART_PORT")
                .ok()
                .and_then(|port| port.parse().ok())
                .unwrap_or(DEFAULT_ART_PORT),
            art_base_url: std::env::var("MANABREW_ART_BASE_URL")
                .ok()
                .filter(|url| !url.is_empty()),
            lan_advertise: std::env::var("MANABREW_LAN_ADVERTISE")
                .map(|value| {
                    matches!(
                        value.to_ascii_lowercase().as_str(),
                        "1" | "true" | "yes" | "on"
                    )
                })
                .unwrap_or(false),
        }
    }

    pub fn capture_max_bytes(&self) -> u64 {
        self.capture_max_gb.saturating_mul(BYTES_PER_GB)
    }
}