passepartout-apple/Passepartout/App/Views/EndpointView+OpenVPN.swift

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//
// EndpointView+OpenVPN.swift
// Passepartout
//
// Created by Davide De Rosa on 2/19/22.
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// Copyright (c) 2023 Davide De Rosa. All rights reserved.
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//
// 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
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import PassepartoutLibrary
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import TunnelKitOpenVPN
extension EndpointView {
struct OpenVPNView: View {
@Environment(\.presentationMode) private var presentationMode
@ObservedObject private var providerManager: ProviderManager
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@ObservedObject private var currentProfile: ObservableProfile
@Binding private var builder: OpenVPN.ConfigurationBuilder
@Binding private var customEndpoint: Endpoint?
private var isConfigurationReadonly: Bool {
currentProfile.value.isProvider
}
@State private var isFirstAppearance = true
@State private var isAutomatic = false
@State private var selectedSocketType: SocketType = .udp
@State private var selectedPort: UInt16 = 0
// XXX: do not escape mutating 'self', use constant providerManager
init(currentProfile: ObservableProfile) {
let providerManager: ProviderManager = .shared
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self.providerManager = providerManager
self.currentProfile = currentProfile
_builder = .init {
if currentProfile.value.isProvider {
guard let server = currentProfile.value.providerServer(providerManager) else {
assertionFailure("Server not found")
return .init()
}
guard let preset = currentProfile.value.providerPreset(server) else {
assertionFailure("Preset not found")
return .init()
}
guard let cfg = preset.openVPNConfiguration else {
assertionFailure("Preset \(preset.id) (\(preset.name)) has no OpenVPN configuration")
return .init()
}
var builder = cfg.builder(withFallbacks: true)
try? builder.setRemotes(from: preset, with: server, excludingHostname: false)
return builder
} else if let cfg = currentProfile.value.hostOpenVPNSettings?.configuration {
let builder = cfg.builder(withFallbacks: true)
// pp_log.debug("Loading OpenVPN configuration: \(builder)")
return builder
}
// fall back gracefully
return .init()
} set: {
if currentProfile.value.isProvider {
// readonly
} else {
pp_log.debug("Saving OpenVPN configuration: \($0)")
currentProfile.value.hostOpenVPNSettings?.configuration = $0.build()
}
}
_customEndpoint = .init {
if currentProfile.value.isProvider {
return currentProfile.value.providerCustomEndpoint()
} else {
return currentProfile.value.hostOpenVPNSettings?.customEndpoint
}
} set: {
if currentProfile.value.isProvider {
currentProfile.value.setProviderCustomEndpoint($0)
} else {
currentProfile.value.hostOpenVPNSettings?.customEndpoint = $0
}
}
}
var body: some View {
ScrollViewReader { scrollProxy in
List {
mainSection
if !isAutomatic {
filtersSection
addressesSection
}
advancedSection
}.onAppear {
scrollToCustomEndpoint(scrollProxy)
preselectFilters(once: true)
}.onChange(of: isAutomatic, perform: onToggleAutomatic)
.onChange(of: selectedSocketType, perform: preselectPort)
.onChange(of: customEndpoint) { _ in
withAnimation {
preselectFilters(once: false)
}
}
}.navigationTitle(L10n.Global.Strings.endpoint)
}
}
}
extension EndpointView.OpenVPNView {
private var mainSection: some View {
Section {
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Toggle(L10n.Global.Strings.automatic, isOn: $isAutomatic.themeAnimation())
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}
}
private var filtersSection: some View {
Section {
themeTextPicker(
L10n.Global.Strings.protocol,
selection: $selectedSocketType,
values: availableSocketTypes,
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description: \.rawValue
)
themeTextPicker(
L10n.Global.Strings.port,
selection: $selectedPort,
values: allPorts(forSocketType: selectedSocketType),
description: \.description
)
}
}
private var addressesSection: some View {
Section {
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filteredRemotes.map {
ForEach($0, content: button(forEndpoint:))
}
} header: {
Text(L10n.Global.Strings.addresses)
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}
}
private var advancedSection: some View {
Section {
let caption = L10n.Endpoint.Advanced.title
NavigationLink(caption) {
EndpointAdvancedView.OpenVPNView(
builder: $builder,
isReadonly: isConfigurationReadonly,
isServerPushed: false
).navigationTitle(caption)
}
}
}
private func button(forEndpoint endpoint: Endpoint?) -> some View {
Button {
customEndpoint = endpoint
presentationMode.wrappedValue.dismiss()
} label: {
text(forEndpoint: endpoint)
}.withTrailingCheckmark(when: customEndpoint == endpoint)
}
private func text(forEndpoint endpoint: Endpoint?) -> some View {
Text(endpoint?.address ?? L10n.Global.Strings.automatic)
.themeLongTextStyle()
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}
}
extension EndpointView.OpenVPNView {
private func onToggleAutomatic(_ value: Bool) {
if value {
guard customEndpoint != nil else {
return
}
customEndpoint = nil
}
}
private func preselectFilters(once: Bool) {
guard !once || isFirstAppearance else {
return
}
isFirstAppearance = false
if let customEndpoint = customEndpoint {
isAutomatic = false
selectedSocketType = customEndpoint.proto.socketType
selectedPort = customEndpoint.proto.port
} else {
isAutomatic = true
guard let socketType = availableSocketTypes.first else {
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assertionFailure("No socket types, empty remotes?")
return
}
selectedSocketType = socketType
preselectPort(forSocketType: socketType)
}
}
private func preselectPort(forSocketType socketType: SocketType) {
let supported = allPorts(forSocketType: socketType)
guard !supported.contains(selectedPort) else {
return
}
guard let port = supported.first else {
assertionFailure("No ports, empty remotes?")
return
}
selectedPort = port
}
private var availableSocketTypes: [SocketType] {
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guard let remotes = builder.remotes else {
return []
}
let allTypes: [SocketType] = [
SocketType.udp,
SocketType.tcp,
SocketType.udp4,
SocketType.tcp4
]
var availableTypes: [SocketType] = []
allTypes.forEach { socketType in
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guard remotes.contains(where: {
$0.proto.socketType == socketType
}) else {
return
}
availableTypes.append(socketType)
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}
return availableTypes
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}
private func allPorts(forSocketType socketType: SocketType) -> [UInt16] {
guard let remotes = builder.remotes else {
return []
}
let allPorts = Set(remotes.filter {
$0.proto.socketType == socketType
}.map(\.proto.port))
return Array(allPorts).sorted()
}
private var filteredRemotes: [Endpoint]? {
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builder.remotes?.filter {
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$0.proto.socketType == selectedSocketType && $0.proto.port == selectedPort
}
}
}
extension EndpointView.OpenVPNView {
private func scrollToCustomEndpoint(_ proxy: ScrollViewProxy) {
proxy.maybeScrollTo(customEndpoint?.id)
}
}