letro-ios/ElementX/Sources/Screens/JoinRoomScreen/JoinRoomScreenModels.swift

//
// Copyright 2022 New Vector Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

import Foundation

enum JoinRoomScreenViewModelAction {
    case joined
    case cancelled
}

enum JoinRoomScreenInteractionMode {
    case loading
    case unknown
    case invited
    case join
    case knock
}

struct JoinRoomScreenRoomDetails {
    let name: String?
    let topic: String?
    let canonicalAlias: String?
    let avatar: RoomAvatar
    let memberCount: UInt
    let inviter: RoomInviterDetails?
}

struct JoinRoomScreenViewState: BindableState {
    // Maybe use room summary details or similar here??
    let roomID: String
    
    var roomDetails: JoinRoomScreenRoomDetails?
    
    var mode: JoinRoomScreenInteractionMode = .loading
    
    var bindings = JoinRoomScreenViewStateBindings()
    
    var title: String {
        roomDetails?.name ?? L10n.screenJoinRoomTitleNoPreview
    }
    
    var subtitle: String? {
        switch mode {
        case .loading: nil
        case .unknown: L10n.screenJoinRoomSubtitleNoPreview
        case .invited, .join, .knock: roomDetails?.canonicalAlias
        }
    }
    
    var avatar: RoomAvatar {
        roomDetails?.avatar ?? .room(id: roomID, name: title, avatarURL: nil)
    }
}

struct JoinRoomScreenViewStateBindings {
    var alertInfo: AlertInfo<JoinRoomScreenAlertType>?
}

enum JoinRoomScreenAlertType {
    case declineInvite
}

enum JoinRoomScreenViewAction {
    case knock
    case join
    case acceptInvite
    case declineInvite
}