35 lines
1.3 KiB
Swift
35 lines
1.3 KiB
Swift
import Combine
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final class ChatsMiddleware {
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static let shared = ChatsMiddleware()
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func middleware(state: AppState, action: AppAction) -> AnyPublisher<AppAction, Never> {
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switch action {
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case .databaseAction(.storedChatsLoaded(let chats)):
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return Just(.chatsAction(.chatsListUpdated(chats: chats)))
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.eraseToAnyPublisher()
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case .chatsAction(.startChat(accountJid: let accountJid, participantJid: let participantJid)):
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return Deferred {
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Future<AppAction, Never> { promise in
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if let exist = state.chatsState.chats.first(where: { $0.account == accountJid && $0.participant == participantJid }) {
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// open existing chat
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promise(.success(.chatsAction(.chatStarted(chat: exist))))
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} else {
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// create new chat
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promise(.success(.chatsAction(.createNewChat(accountJid: accountJid, participantJid: participantJid))))
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}
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}
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}
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.eraseToAnyPublisher()
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case .chatsAction(.chatCreated(let chat)):
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return Just(.chatsAction(.chatStarted(chat: chat)))
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.eraseToAnyPublisher()
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default:
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return Empty().eraseToAnyPublisher()
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}
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}
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}
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