114 lines
4.2 KiB
Swift
114 lines
4.2 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 Foundation
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import MatrixRustSDK
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private class SlidingSyncViewObserver: SlidingSyncListRoomListObserver, SlidingSyncListStateObserver, SlidingSyncListRoomsCountObserver {
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/// Publishes room list diffs as they come in through sliding sync
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let roomListDiffPublisher = PassthroughSubject<SlidingSyncListRoomsListDiff, Never>()
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/// Publishes the current state of sliding sync, such as whether its catching up or live.
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let stateUpdatePublisher = CurrentValueSubject<SlidingSyncState, Never>(.cold)
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/// Publishes the number of available rooms
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let countUpdatePublisher = CurrentValueSubject<UInt, Never>(0)
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// MARK: - SlidingSyncListRoomListObserver
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func didReceiveUpdate(diff: SlidingSyncListRoomsListDiff) {
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MXLog.verbose("Received room diff")
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roomListDiffPublisher.send(diff)
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}
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// MARK: - SlidingSyncListStateObserver
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func didReceiveUpdate(newState: SlidingSyncState) {
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MXLog.info("Updated state: \(newState)")
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stateUpdatePublisher.send(newState)
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}
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// MARK: - SlidingSyncListRoomsCountObserver
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func didReceiveUpdate(count: UInt32) {
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MXLog.info("Updated room count: \(count)")
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countUpdatePublisher.send(UInt(count))
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}
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}
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class SlidingSyncViewProxy {
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private let slidingSync: SlidingSyncProtocol
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private let slidingSyncView: SlidingSyncListProtocol
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private var listUpdateObserverToken: TaskHandle?
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private var stateUpdateObserverToken: TaskHandle?
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private var countUpdateObserverToken: TaskHandle?
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private var cancellables = Set<AnyCancellable>()
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let diffPublisher = PassthroughSubject<SlidingSyncListRoomsListDiff, Never>()
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let statePublisher = PassthroughSubject<SlidingSyncState, Never>()
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let countPublisher = PassthroughSubject<UInt, Never>()
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let visibleRangeUpdatePublisher = PassthroughSubject<Void, Never>()
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deinit {
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listUpdateObserverToken?.cancel()
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stateUpdateObserverToken?.cancel()
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countUpdateObserverToken?.cancel()
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}
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init(slidingSync: SlidingSyncProtocol, slidingSyncView: SlidingSyncListProtocol) {
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self.slidingSync = slidingSync
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self.slidingSyncView = slidingSyncView
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let slidingSyncViewObserver = SlidingSyncViewObserver()
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slidingSyncViewObserver.stateUpdatePublisher
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.subscribe(statePublisher)
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.store(in: &cancellables)
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slidingSyncViewObserver.countUpdatePublisher
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.subscribe(countPublisher)
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.store(in: &cancellables)
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slidingSyncViewObserver.roomListDiffPublisher
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.subscribe(diffPublisher)
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.store(in: &cancellables)
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listUpdateObserverToken = slidingSyncView.observeRoomList(observer: slidingSyncViewObserver)
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stateUpdateObserverToken = slidingSyncView.observeState(observer: slidingSyncViewObserver)
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countUpdateObserverToken = slidingSyncView.observeRoomsCount(observer: slidingSyncViewObserver)
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}
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func currentRoomsList() -> [RoomListEntry] {
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slidingSyncView.currentRoomsList()
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}
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func roomForIdentifier(_ identifier: String) throws -> SlidingSyncRoomProtocol? {
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try slidingSync.getRoom(roomId: identifier)
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}
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func updateVisibleRange(_ range: Range<Int>, timelineLimit: UInt) {
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MXLog.info("Setting sliding sync view range to \(range), timeline limit: \(timelineLimit)")
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slidingSyncView.setRange(start: UInt32(range.lowerBound), end: UInt32(range.upperBound))
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slidingSyncView.setTimelineLimit(value: UInt32(timelineLimit))
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visibleRangeUpdatePublisher.send(())
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}
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}
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