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116 lines
3.8 KiB
Swift
116 lines
3.8 KiB
Swift
// File created from SimpleUserProfileExample
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// $ createScreen.sh Room/UserSuggestion UserSuggestion
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//
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// Copyright 2021 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 Foundation
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import Combine
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@available(iOS 14.0, *)
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struct RoomMembersProviderMember {
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var userId: String
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var displayName: String
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var avatarUrl: String
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}
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@available(iOS 14.0, *)
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protocol RoomMembersProviderProtocol {
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func fetchMembers(_ members: @escaping ([RoomMembersProviderMember]) -> Void)
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}
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@available(iOS 14.0, *)
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struct UserSuggestionServiceItem: UserSuggestionItemProtocol {
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let userId: String
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let displayName: String?
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let avatarUrl: String?
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}
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@available(iOS 14.0, *)
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class UserSuggestionService: UserSuggestionServiceProtocol {
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// MARK: - Properties
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// MARK: Private
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private let roomMemberProvider: RoomMembersProviderProtocol
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private var suggestionItems: [UserSuggestionItemProtocol] = []
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private let currentTextTriggerSubject = CurrentValueSubject<String?, Never>(nil)
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private var cancellables = Set<AnyCancellable>()
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// MARK: Public
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var items = CurrentValueSubject<[UserSuggestionItemProtocol], Never>([])
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var currentTextTrigger: String? {
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currentTextTriggerSubject.value
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}
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// MARK: - Setup
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init(roomMemberProvider: RoomMembersProviderProtocol) {
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self.roomMemberProvider = roomMemberProvider
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currentTextTriggerSubject
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.debounce(for: 0.5, scheduler: RunLoop.main)
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.removeDuplicates()
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.sink { [weak self] in self?.fetchAndFilterMembersForTextTrigger($0) }
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.store(in: &cancellables)
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}
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// MARK: - UserSuggestionServiceProtocol
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func processTextMessage(_ textMessage: String?) {
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guard let textMessage = textMessage,
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textMessage.count > 0,
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let lastComponent = textMessage.components(separatedBy: .whitespaces).last,
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lastComponent.prefix(while: { $0 == "@" }).count == 1 // Partial username should start with one and only one "@" character
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else {
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self.items.send([])
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self.currentTextTriggerSubject.send(nil)
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return
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}
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self.currentTextTriggerSubject.send(lastComponent)
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}
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// MARK: - Private
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private func fetchAndFilterMembersForTextTrigger(_ textTrigger: String?) {
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guard var partialName = textTrigger else {
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return
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}
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partialName.removeFirst() // remove the '@' prefix
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roomMemberProvider.fetchMembers { [weak self] members in
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guard let self = self else {
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return
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}
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self.suggestionItems = members.map { member in
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UserSuggestionServiceItem(userId: member.userId, displayName: member.displayName, avatarUrl: member.avatarUrl)
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}
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self.items.send(self.suggestionItems.filter({ userSuggestion in
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let containedInUsername = userSuggestion.userId.lowercased().contains(partialName.lowercased())
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let containedInDisplayName = (userSuggestion.displayName ?? "").lowercased().contains(partialName.lowercased())
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return (containedInUsername || containedInDisplayName)
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}))
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}
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}
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}
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