mirror of
https://github.com/vector-im/element-ios.git
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134 lines
4.8 KiB
Swift
134 lines
4.8 KiB
Swift
//
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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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class TemplateRoomChatService: TemplateRoomChatServiceProtocol {
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// MARK: - Properties
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// MARK: Private
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private let room: MXRoom
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private let eventFormatter: EventFormatter
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private var roomState: MXRoomState?
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private var roomListenerReference: Any?
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// MARK: Public
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private(set) var chatMessagesSubject: CurrentValueSubject<[TemplateRoomChatMessage], Never>
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private(set) var roomInitializationStatus: CurrentValueSubject<TemplateRoomChatRoomInitializationStatus, Never>
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var roomName: String? {
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self.room.summary.displayname
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}
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// MARK: - Setup
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init(room: MXRoom) {
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self.room = room
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self.eventFormatter = EventFormatter(matrixSession: room.mxSession)
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self.chatMessagesSubject = CurrentValueSubject([])
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self.roomInitializationStatus = CurrentValueSubject(.notInitialized)
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initializeRoom()
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}
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deinit {
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guard let reference = roomListenerReference else { return }
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room.removeListener(reference)
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}
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// MARK: Public
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func send(textMessage: String) {
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var localEcho: MXEvent? = nil
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room.sendTextMessage(textMessage, localEcho: &localEcho, completion: { _ in })
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}
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// MARK: Private
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private func initializeRoom(){
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room.state { [weak self] roomState in
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guard let self = self else { return }
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if let roomState = roomState {
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self.roomState = roomState
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self.roomInitializationStatus.value = .initialized
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self.loadInitialMessages()
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self.startListeningToRoomEvents()
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} else {
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self.roomInitializationStatus.value = .failedToInitialize
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}
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}
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}
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private func loadInitialMessages() {
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let batch = room.enumeratorForStoredMessages.nextEventsBatch(200)
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let messageBatch = self.mapChatMessages(from: batch ?? [])
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self.chatMessagesSubject.value = messageBatch
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}
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private func startListeningToRoomEvents(){
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roomListenerReference = room.listen { [weak self] event, directionId, roomState in
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let direction = MXTimelineDirection(identifer: directionId)
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guard let self = self,
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let event = event else { return }
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if let roomState = roomState {
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self.roomState = roomState
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}
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if direction == .forwards && event.type == kMXEventTypeStringRoomMessage {
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self.appendNewMessage(event: event)
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}
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}
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}
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private func mapChatMessages(from events: [MXEvent]) -> [TemplateRoomChatMessage] {
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return events
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.filter({ event in
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event.type == kMXEventTypeStringRoomMessage
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&& event.content["msgtype"] as? String == kMXMessageTypeText
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// TODO: New to our SwiftUI Template? Why not implement another message type like image?
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})
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.compactMap({ event -> TemplateRoomChatMessage? in
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guard let eventId = event.eventId,
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let body = event.content["body"] as? String,
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let sender = senderForMessage(event: event)
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else { return nil }
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return TemplateRoomChatMessage(
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id: eventId,
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content: .text(TemplateRoomChatMessageTextContent(body: body)),
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sender: sender,
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timestamp: Date(timeIntervalSince1970: TimeInterval(event.originServerTs / 1000))
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)
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})
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}
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private func senderForMessage(event: MXEvent) -> TemplateRoomChatMember? {
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guard let sender = event.sender, let roomState = roomState else {
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return nil
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}
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let displayName = eventFormatter.senderDisplayName(for: event, with: roomState)
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let avatarUrl = eventFormatter.senderAvatarUrl(for: event, with: roomState)
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return TemplateRoomChatMember(id: sender, avatarUrl: avatarUrl, displayName: displayName)
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}
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private func appendNewMessage(event: MXEvent) {
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chatMessagesSubject.value += mapChatMessages(from: [event])
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}
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}
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