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Add download manager for WKWebView (#3157)
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100 changes: 100 additions & 0 deletions
100
Sources/App/WebView/DownloadManager/DownloadManagerView.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| import Shared | ||
| import SwiftUI | ||
|
|
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| @available(iOS 17.0, *) | ||
| struct DownloadManagerView: View { | ||
| @Environment(\.dismiss) private var dismiss | ||
|
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| @StateObject var viewModel: DownloadManagerViewModel | ||
|
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| init(viewModel: DownloadManagerViewModel) { | ||
| self._viewModel = .init(wrappedValue: viewModel) | ||
| } | ||
|
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| var body: some View { | ||
| VStack(spacing: .zero) { | ||
| HStack { | ||
| Button(action: { | ||
| viewModel.deleteFile() | ||
| dismiss() | ||
| }, label: { | ||
| Image(systemSymbol: .xmarkCircleFill) | ||
| .font(.title) | ||
| .foregroundStyle( | ||
| Color(uiColor: .systemBackground), | ||
| .gray.opacity(0.5) | ||
| ) | ||
| }) | ||
| .frame(maxWidth: .infinity, alignment: .trailing) | ||
| .padding() | ||
| } | ||
| if viewModel.finished { | ||
| successView | ||
| } else if viewModel.failed { | ||
| fileCard | ||
| failedCard | ||
| } else { | ||
| ProgressView() | ||
| .progressViewStyle(.circular) | ||
| .scaleEffect(2) | ||
| .padding(Spaces.four) | ||
| Text(L10n.DownloadManager.Downloading.title) | ||
| .font(.title.bold()) | ||
| fileCard | ||
| } | ||
| Spacer() | ||
| } | ||
| } | ||
|
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| private var successView: some View { | ||
| VStack(spacing: Spaces.three) { | ||
| Image(systemSymbol: .checkmark) | ||
| .foregroundStyle(.green) | ||
| .font(.system(size: 100)) | ||
| .symbolEffect( | ||
| .bounce, | ||
| options: .nonRepeating | ||
| ) | ||
| Text(L10n.DownloadManager.Finished.title) | ||
| .font(.title.bold()) | ||
| if let url = viewModel.lastURLCreated { | ||
| ShareLink(viewModel.fileName, item: url) | ||
| .padding() | ||
| .foregroundStyle(.white) | ||
| .background(Color.asset(Asset.Colors.haPrimary)) | ||
| .clipShape(RoundedRectangle(cornerRadius: 12)) | ||
| .padding() | ||
| } | ||
| } | ||
| } | ||
|
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| private var fileCard: some View { | ||
| HStack { | ||
| Image(systemSymbol: .docZipper) | ||
| Text(viewModel.fileName) | ||
| } | ||
| .padding() | ||
| .frame(maxWidth: .infinity, alignment: .leading) | ||
| .background(.gray.opacity(0.5)) | ||
| .clipShape(RoundedRectangle(cornerRadius: 12)) | ||
| .padding() | ||
| } | ||
|
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| private var failedCard: some View { | ||
| Text(viewModel.errorMessage) | ||
| .frame(maxWidth: .infinity, alignment: .leading) | ||
| .multilineTextAlignment(.leading) | ||
| .padding() | ||
| .background(.red.opacity(0.5)) | ||
| .clipShape(RoundedRectangle(cornerRadius: 12)) | ||
| .padding() | ||
| } | ||
| } | ||
|
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| #Preview { | ||
| if #available(iOS 17.0, *) { | ||
| DownloadManagerView(viewModel: .init()) | ||
| } else { | ||
| Text("Hey there") | ||
| } | ||
| } |
57 changes: 57 additions & 0 deletions
57
Sources/App/WebView/DownloadManager/DownloadManagerViewModel.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| import Foundation | ||
| import Shared | ||
| import WebKit | ||
|
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| @MainActor | ||
| final class DownloadManagerViewModel: NSObject, ObservableObject { | ||
| @Published var fileName: String = "" | ||
| @Published var finished: Bool = false | ||
| @Published var failed: Bool = false | ||
| @Published var errorMessage: String = "" | ||
| @Published var lastURLCreated: URL? | ||
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| func deleteFile() { | ||
| if let url = lastURLCreated { | ||
| // Guarantee to delete file before leaving screen | ||
| do { | ||
| try FileManager.default.removeItem(at: url) | ||
| } catch { | ||
| Current.Log.error("Failed to remove file before leaving download manager at \(url), error: \(error)") | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| extension DownloadManagerViewModel: WKDownloadDelegate { | ||
| func download( | ||
| _ download: WKDownload, | ||
| decideDestinationUsing response: URLResponse, | ||
| suggestedFilename: String | ||
| ) async -> URL? { | ||
| let urls = FileManager.default.urls(for: .cachesDirectory, in: .allDomainsMask) | ||
| let name = suggestedFilename.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed) ?? "Unknown" | ||
| fileName = name | ||
| if let url = URL(string: name, relativeTo: urls[0]) { | ||
| lastURLCreated = url | ||
| // Guarantee file does not exist, otherwise download will fail | ||
| do { | ||
| try FileManager.default.removeItem(at: url) | ||
| } catch { | ||
| Current.Log.error("Failed to remove file for download manager at \(url), error: \(error)") | ||
| } | ||
|
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| return url | ||
| } else { | ||
| return nil | ||
| } | ||
| } | ||
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| func downloadDidFinish(_ download: WKDownload) { | ||
| finished = true | ||
| } | ||
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| func download(_ download: WKDownload, didFailWithError error: any Error, resumeData: Data?) { | ||
| errorMessage = L10n.DownloadManager.Failed.title(error.localizedDescription) | ||
| failed = true | ||
| } | ||
| } |
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