120 lines
3.9 KiB
Swift
120 lines
3.9 KiB
Swift
//
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// Copyright 2022 New Vector Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import Combine
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import SwiftUI
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typealias InviteUsersScreenViewModelType = StateStoreViewModel<InviteUsersScreenViewState, InviteUsersScreenViewAction>
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class InviteUsersScreenViewModel: InviteUsersScreenViewModelType, InviteUsersScreenViewModelProtocol {
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private let userSession: UserSessionProtocol
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private let userDiscoveryService: UserDiscoveryServiceProtocol
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private let actionsSubject: PassthroughSubject<InviteUsersScreenViewModelAction, Never> = .init()
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var actions: AnyPublisher<InviteUsersScreenViewModelAction, Never> {
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actionsSubject.eraseToAnyPublisher()
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}
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init(userSession: UserSessionProtocol, userDiscoveryService: UserDiscoveryServiceProtocol) {
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self.userSession = userSession
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self.userDiscoveryService = userDiscoveryService
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super.init(initialViewState: InviteUsersScreenViewState(), imageProvider: userSession.mediaProvider)
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setupSubscriptions()
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}
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// MARK: - Public
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override func process(viewAction: InviteUsersScreenViewAction) {
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switch viewAction {
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case .close:
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actionsSubject.send(.close)
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case .proceed:
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actionsSubject.send(.proceed(users: state.selectedUsers))
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case .tapUser(let user):
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if state.isUserSelected(user) {
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deselect(user)
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} else {
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select(user)
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}
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case .deselectUser(let user):
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deselect(user)
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}
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}
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private func select(_ user: UserProfile) {
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state.selectedUsers.append(user)
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state.scrollToLastID = user.userID
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}
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private func deselect(_ user: UserProfile) {
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state.selectedUsers.removeAll(where: { $0.userID == user.userID })
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state.scrollToLastID = nil
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}
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// MARK: - Private
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private func setupSubscriptions() {
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context.$viewState
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.map(\.bindings.searchQuery)
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.debounceAndRemoveDuplicates()
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.sink { [weak self] _ in
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self?.fetchUsers()
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}
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.store(in: &cancellables)
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}
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@CancellableTask
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private var fetchUsersTask: Task<Void, Never>?
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private func fetchUsers() {
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guard searchQuery.count >= 3 else {
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fetchSuggestions()
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return
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}
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fetchUsersTask = Task {
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let result = await userDiscoveryService.searchProfiles(with: searchQuery)
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guard !Task.isCancelled else { return }
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handleResult(for: .searchResult, result: result)
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}
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}
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private func fetchSuggestions() {
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guard ServiceLocator.shared.settings.startChatUserSuggestionsEnabled else {
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state.usersSection = .init(type: .suggestions, users: [])
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return
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}
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fetchUsersTask = Task {
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let result = await userDiscoveryService.fetchSuggestions()
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guard !Task.isCancelled else { return }
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handleResult(for: .suggestions, result: result)
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}
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}
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private func handleResult(for sectionType: UserDiscoverySectionType, result: Result<[UserProfile], UserDiscoveryErrorType>) {
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switch result {
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case .success(let users):
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state.usersSection = .init(type: sectionType, users: users)
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case .failure:
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break
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}
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}
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private var searchQuery: String {
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context.searchQuery
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}
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}
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