passepartout-apple/Passepartout/App/Views/DebugLogView.swift

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Swift
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2022-04-12 13:09:14 +00:00
//
// DebugLogView.swift
// Passepartout
//
// Created by Davide De Rosa on 2/19/22.
// Copyright (c) 2022 Davide De Rosa. All rights reserved.
//
// https://github.com/passepartoutvpn
//
// This file is part of Passepartout.
//
// Passepartout is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Passepartout is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Passepartout. If not, see <http://www.gnu.org/licenses/>.
//
import SwiftUI
import Combine
import PassepartoutCore
struct DebugLogView: View {
private let url: URL
private let timer: AnyPublisher<Date, Never>
@State private var logLines: [String] = []
@State private var isSharing = false
private let maxBytes = UInt64(Constants.Log.tunnelLogMaxBytes)
private let appName = Constants.Global.appName
private let appVersion = Constants.Global.appVersionString
private let shareFilename = Unlocalized.Issues.Filenames.debugLog
init(url: URL, updateInterval: TimeInterval) {
self.url = url
timer = Timer.TimerPublisher(interval: updateInterval, runLoop: .main, mode: .common)
.autoconnect()
.eraseToAnyPublisher()
}
var body: some View {
ScrollViewReader { scrollProxy in
ScrollView(showsIndicators: true) {
contentView
}.toolbar(content: toolbar)
.onAppear {
refreshLog(scrollingToLatestWith: scrollProxy)
}.onReceive(timer, perform: refreshLog)
}.sheet(isPresented: $isSharing, content: sharingActivityView)
.navigationTitle(L10n.DebugLog.title)
.themeDebugLogFont()
.edgesIgnoringSafeArea([.leading, .trailing])
}
@ViewBuilder
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private func toolbar() -> some View {
if !isSharing {
Button(action: shareDebugLog) {
themeShareImage.asSystemImage
}.disabled(logLines.isEmpty)
} else {
ProgressView()
}
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}
private var contentView: some View {
LazyVStack {
ForEach(logLines.indices, id: \.self) {
Text(logLines[$0])
.frame(maxWidth: .infinity, alignment: .leading)
}
}//.padding()
// FIXME: layout, a slight padding would be nice, but it glitches on first touch
}
private func refreshLog(scrollingToLatestWith scrollProxy: ScrollViewProxy?) {
logLines = url.trailingLines(bytes: maxBytes)
if let scrollProxy = scrollProxy {
scrollToLatestUpdate(scrollProxy)
}
}
private func refreshLog(_: Date) {
refreshLog(scrollingToLatestWith: nil)
}
private func shareDebugLog() {
guard !logLines.isEmpty else {
assertionFailure("Log is empty, why could it share?")
return
}
isSharing = true
}
}
extension DebugLogView {
private func sharingActivityView() -> some View {
ActivityView(activityItems: sharingItems)
}
private var sharingItems: [Any] {
let raw = logLines.joined(separator: "\n")
let data = DebugLog(content: raw).decoratedData(appName, appVersion)
let path = NSTemporaryDirectory().appending(shareFilename)
let url = URL(fileURLWithPath: path)
do {
try data.write(to: url)
return [url]
} catch {
// highly unlikely to happen
assertionFailure("Unable to save temporary debug log file: \(error)")
return []
}
}
}
extension DebugLogView {
private func scrollToLatestUpdate(_ proxy: ScrollViewProxy) {
proxy.maybeScrollTo(logLines.count - 1, anchor: .bottomLeading)
}
}