import Foundation

final class RosterModule: XmppModule {
    let id = "Roseter module"

    func reduce(oldState: ClientState, with _: Event) -> ClientState {
        oldState
    }

    func process(state: ClientState, with event: Event) async -> Event? {
        switch event {
        case .streamReady:
            return .requestRoster

        case .requestRoster:
            // TODO: check version!
            let req = Stanza.iqGet(from: state.jid.full, payload: XMLElement(name: "query", xmlns: "jabber:iq:roster", attributes: [:], content: nil, nodes: []))
            if let req {
                return .stanzaOutbound(req)
            } else {
                return nil
            }

        default:
            return nil
        }
    }
}