76 lines
3.3 KiB
Swift
76 lines
3.3 KiB
Swift
//
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// Copyright 2024 New Vector Ltd.
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//
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// SPDX-License-Identifier: AGPL-3.0-only
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// Please see LICENSE in the repository root for full details.
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//
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import Combine
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import Foundation
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typealias TimelineMediaPreviewViewModelType = StateStoreViewModel<TimelineMediaPreviewViewState, TimelineMediaPreviewViewAction>
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class TimelineMediaPreviewViewModel: TimelineMediaPreviewViewModelType {
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private let mediaProvider: MediaProviderProtocol
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private let userIndicatorController: UserIndicatorControllerProtocol
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private let actionsSubject: PassthroughSubject<TimelineMediaPreviewViewModelAction, Never> = .init()
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var actions: AnyPublisher<TimelineMediaPreviewViewModelAction, Never> {
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actionsSubject.eraseToAnyPublisher()
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}
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init(previewItems: [EventBasedMessageTimelineItemProtocol], mediaProvider: MediaProviderProtocol, userIndicatorController: UserIndicatorControllerProtocol) {
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self.mediaProvider = mediaProvider
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// We might not want to inject this, instead creating a new instance with a custom position and colour scheme 🤔
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self.userIndicatorController = userIndicatorController
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super.init(initialViewState: TimelineMediaPreviewViewState(previewItems: previewItems.map(TimelineMediaPreviewItem.init)), mediaProvider: mediaProvider)
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}
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override func process(viewAction: TimelineMediaPreviewViewAction) {
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switch viewAction {
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case .viewInTimeline:
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actionsSubject.send(.viewInTimeline)
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case .redact:
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break // Do it here??
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}
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}
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func updateCurrentItem(_ previewItem: TimelineMediaPreviewItem) async {
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state.currentItem = previewItem
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if previewItem.fileHandle == nil, let source = previewItem.mediaSource {
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showDownloadingIndicator(itemID: previewItem.id)
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defer { hideDownloadingIndicator(itemID: previewItem.id) }
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switch await mediaProvider.loadFileFromSource(source) {
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case .success(let handle):
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previewItem.fileHandle = handle
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actionsSubject.send(.loadedMediaFile)
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case .failure(let error):
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MXLog.error("Failed loading media: \(error)")
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#warning("Show the error!")
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}
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}
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}
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private func showDownloadingIndicator(itemID: TimelineItemIdentifier) {
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let indicatorID = makeDownloadIndicatorID(itemID: itemID)
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userIndicatorController.submitIndicator(UserIndicator(id: indicatorID,
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type: .toast(progress: .indeterminate),
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title: L10n.commonDownloading,
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persistent: true),
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delay: .seconds(0.1)) // Don't show the indicator when the SDK loads the file from the store.
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}
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private func hideDownloadingIndicator(itemID: TimelineItemIdentifier) {
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let indicatorID = makeDownloadIndicatorID(itemID: itemID)
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userIndicatorController.retractIndicatorWithId(indicatorID)
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}
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private func makeDownloadIndicatorID(itemID: TimelineItemIdentifier) -> String {
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"\(TimelineMediaPreviewViewModel.self)-Download-\(itemID.uniqueID.id)"
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}
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}
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