557 lines
18 KiB
Swift
557 lines
18 KiB
Swift
import CoreData
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import Foundation
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import Observation
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import SwiftData
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import SwiftUI
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@MainActor
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@Observable
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final class Servers {
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static let shared = Servers()
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private(set) var entries: [(origin: String, record: ServerRecord)] = []
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private(set) var connections: [String: Connection] = [:]
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var current: String?
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@ObservationIgnored var openWindow: (() -> Void)?
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private init() {
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load()
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current = origins.first
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Task {
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for await note in NotificationCenter.default.notifications(named: NSPersistentCloudKitContainer.eventChangedNotification) {
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if let event = note.userInfo?[NSPersistentCloudKitContainer.eventNotificationUserInfoKey] as? NSPersistentCloudKitContainer.Event, event.type == .import, event.endDate != nil {
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for connection in connections.values {
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connection.store?.drafts?.reload()
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}
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load()
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}
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}
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}
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}
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var origins: [String] {
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entries.map(\.origin)
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}
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func record(_ origin: String) -> ServerRecord? {
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entries.first { $0.origin == origin }?.record
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}
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func color(_ origin: String) -> Color {
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taskPalette[(record(origin)?.color ?? 0) % taskPalette.count]
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}
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private func load() {
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var loaded: [(origin: String, record: ServerRecord)] = []
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for record in fetchRecords(FetchDescriptor<ServerRecord>(sortBy: [SortDescriptor(\.saved)])) {
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if let origin = parseOrigin(record.origin), !loaded.contains(where: { $0.origin == origin.absoluteString }) {
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loaded.append((origin.absoluteString, record))
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}
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}
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entries = loaded
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if let current, record(current) == nil {
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self.current = origins.first
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}
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for (origin, _) in loaded where connections[origin] == nil {
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connections[origin] = Connection(origin: parseOrigin(origin)!)
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}
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for (origin, connection) in connections where !loaded.contains(where: { $0.origin == origin }) {
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connections[origin] = nil
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Task {
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await connection.stop()
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}
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}
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}
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func add(_ origin: URL) {
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if record(origin.absoluteString) == nil {
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let used = Set(entries.map(\.record.color))
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let color = taskPalette.indices.first { !used.contains($0) } ?? entries.count % taskPalette.count
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persistence.insert(ServerRecord(origin: origin.absoluteString, color: color))
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saveRecords()
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}
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load()
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}
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func remove(_ origin: String) {
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for record in fetchRecords(FetchDescriptor<ServerRecord>()) where parseOrigin(record.origin)?.absoluteString == origin {
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persistence.delete(record)
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}
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saveRecords()
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load()
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}
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func setColor(_ origin: String, _ color: Int) {
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for record in fetchRecords(FetchDescriptor<ServerRecord>()) where parseOrigin(record.origin)?.absoluteString == origin {
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record.color = color
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}
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saveRecords()
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}
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func step(from origin: String?, by step: Int) -> String? {
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guard let i = origin.flatMap({ origins.firstIndex(of: $0) }) else {
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return origins.first
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}
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return origins[(i + step + origins.count) % origins.count]
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}
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func show(_ origin: String) {
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if record(origin) != nil {
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current = origin
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}
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openWindow?()
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}
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}
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func serverName(_ origin: String) -> String {
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let host = URL(string: origin)?.host() ?? origin
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return host.split(separator: ".").first.map(String.init) ?? host
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}
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@MainActor
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@Observable
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final class Connection {
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enum Phase {
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case starting
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case failed(String)
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case running(Store)
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}
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let origin: URL
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let overlays = Overlays()
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var phase: Phase = .starting
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@ObservationIgnored private var stopped = false
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@ObservationIgnored private var restarting = false
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init(origin: URL) {
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self.origin = origin
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Task {
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await start()
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}
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}
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var store: Store? {
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if case .running(let store) = phase {
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return store
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}
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return nil
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}
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func stop() async {
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stopped = true
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if let store {
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await store.stop()
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}
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}
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private func start() async {
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let old = store
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while !stopped, !(await attempt(old)) {
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try? await Task.sleep(for: .seconds(2))
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}
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if let old {
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await old.stop()
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}
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}
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private func reconnected(_ startedAt: Date) {
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guard !restarting else {
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return
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}
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Task {
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guard let status = try? await API(origin: origin).client.getStatus().ok.body.json, status.startedAt != startedAt, !stopped, !restarting else {
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return
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}
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log.notice("\(self.origin.absoluteString, privacy: .public) restarted, reloading")
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restarting = true
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await start()
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restarting = false
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}
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}
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private func attempt(_ old: Store?) async -> Bool {
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let store = Store(api: API(origin: origin), images: old?.images ?? ImageDrafts())
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do {
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let status = try await store.api.client.getStatus().ok.body.json
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async let me: Void = store.loadMe()
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async let projects: Void = store.loadProjects()
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async let inbox: Void = store.loadInbox()
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async let lead: Void = store.loadLeadSessions()
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async let reads: Void = store.loadSummaryReads()
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_ = try await (me, projects, inbox, lead, reads)
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try await store.loadFocus()
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guard !stopped else {
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await store.stop()
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return true
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}
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store.loadDrafts(from: old)
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Task {
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await store.startLeadStream()
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}
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phase = .running(store)
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store.startGlobalStream(after: status.lastEventSeq) { [weak self] in
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self?.reconnected(status.startedAt)
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}
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store.remote.start()
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Notifier.shared.deliver()
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return true
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} catch {
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await store.stop()
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if !stopped {
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phase = .failed("byre failed to start: \(errorText(error))")
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}
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return false
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}
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}
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}
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@MainActor
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@Observable
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final class ConnectForm {
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var serverText = ""
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var problem: String?
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var missing: [Check] = []
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var connecting = false
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func connect() async -> URL? {
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guard let origin = parseOrigin(serverText) else {
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problem = "The server URL must be an https origin with no path, such as https://byre.example.ts.net."
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return nil
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}
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connecting = true
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problem = nil
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do {
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_ = try await API(origin: origin).client.getStatus().ok
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} catch {
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connecting = false
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problem = explain(error, origin)
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return nil
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}
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connecting = false
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Servers.shared.add(origin)
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return origin
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}
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func installHere() async -> URL? {
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connecting = true
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problem = nil
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missing = []
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do {
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let checks = try await Server.checks()
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if !checks.ready {
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missing = checks.checks.filter { !$0.ok }
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connecting = false
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return nil
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}
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let origin = try await Server.turnOn()
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serverText = origin.absoluteString
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try await waitForServer(origin)
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} catch {
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connecting = false
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problem = errorText(error)
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return nil
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}
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return await connect()
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}
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private func waitForServer(_ origin: URL) async throws {
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let api = API(origin: origin)
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try await withThrowingTaskGroup(of: Void.self) { group in
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group.addTask {
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while (try? await api.client.getStatus().ok) == nil {
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try await Task.sleep(for: .milliseconds(500))
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}
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}
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group.addTask {
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try await Task.sleep(for: .seconds(10))
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throw ProcessFailure(errorDescription: "byre was installed but \(origin.absoluteString) didn't answer within 10 s.")
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}
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defer {
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group.cancelAll()
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}
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try await group.next()
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}
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}
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}
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private let tlsErrors: Set<URLError.Code> = [
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.serverCertificateUntrusted, .serverCertificateHasBadDate, .serverCertificateNotYetValid, .serverCertificateHasUnknownRoot,
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.secureConnectionFailed, .clientCertificateRejected, .clientCertificateRequired,
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]
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private let unreachableErrors: Set<URLError.Code> = [
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.cannotFindHost, .cannotConnectToHost, .dnsLookupFailed, .timedOut, .notConnectedToInternet, .networkConnectionLost,
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]
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func explain(_ error: any Error, _ origin: URL) -> String {
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let host = origin.host() ?? origin.absoluteString
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let e = rootError(error)
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if let api = e as? ApiError {
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switch api.status {
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case 401:
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return "\(host) answered 401, no Tailscale identity: \(api.message). Use byre's ts.net HTTPS address, the one tailscale serve gives it, so the request carries your Tailscale login."
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case 403:
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return "\(host) answered 403, the request didn't come through tailscale serve: \(api.message). Use the HTTPS address tailscale serve gives byre."
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default:
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return api.message
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}
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}
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if let url = e as? URLError {
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if tlsErrors.contains(url.code) {
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return "\(host)'s certificate isn't trusted: \(url.localizedDescription) Use byre's ts.net HTTPS address, whose certificate tailscale serve provides."
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}
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if unreachableErrors.contains(url.code) {
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return "Can't reach \(host): \(url.localizedDescription) Is Tailscale connected?"
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}
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return url.localizedDescription
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}
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return errorText(e)
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}
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struct ConnectView: View {
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@Bindable var form: ConnectForm
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let connected: (URL) -> Void
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var body: some View {
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GeometryReader { g in
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ScrollView {
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fields
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.padding(.vertical, 24)
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.frame(maxWidth: .infinity, minHeight: g.size.height)
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}
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}
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}
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private var fields: some View {
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VStack(alignment: .leading, spacing: 10) {
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Text("Server URL")
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TextField("https://byre.example.ts.net", text: $form.serverText)
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.textFieldStyle(.roundedBorder)
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.onSubmit(connect)
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HStack(spacing: 10) {
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Button("Connect", action: connect)
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Button("Run byre on this Mac", action: installHere)
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}
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.disabled(form.connecting)
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if let problem = form.problem {
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Text(problem)
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.foregroundStyle(Palette.danger)
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.textSelection(.enabled)
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.fixedSize(horizontal: false, vertical: true)
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}
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if !form.missing.isEmpty {
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Text("byre can't run on this Mac yet. Install what's missing, then click Run byre on this Mac again.")
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.fixedSize(horizontal: false, vertical: true)
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.padding(.top, 6)
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ChecksView(checks: form.missing)
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}
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}
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.frame(width: 460)
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}
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private func connect() {
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Task {
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if let origin = await form.connect() {
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connected(origin)
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}
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}
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}
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private func installHere() {
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Task {
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if let origin = await form.installHere() {
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connected(origin)
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}
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}
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}
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}
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struct FatalView: View {
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let message: String
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var body: some View {
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Text(message)
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.foregroundStyle(Palette.danger)
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.textSelection(.enabled)
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.padding(24)
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.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
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}
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}
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struct ServerFocus {
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let store: Store?
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let overlays: Overlays
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let forget: () -> Void
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}
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extension FocusedValues {
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@Entry var serverWindow: ServerFocus?
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}
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struct ServerWindow: View {
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@ViewState private var form = ConnectForm()
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@Environment(\.openWindow) private var openWindow
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private var connection: Connection? {
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Servers.shared.current.flatMap { Servers.shared.connections[$0] }
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}
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private var focus: ServerFocus? {
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connection.map { ServerFocus(store: $0.store, overlays: $0.overlays, forget: forget) }
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}
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private var frameColor: Color {
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connection.map { Servers.shared.color($0.origin.absoluteString) } ?? Palette.bg
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}
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@ViewBuilder
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private var content: some View {
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if let connection {
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switch connection.phase {
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case .starting:
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Color.clear
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case .failed(let message):
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FatalView(message: message)
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case .running(let store):
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MainView()
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.environment(store)
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.environment(connection.overlays)
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.id(ObjectIdentifier(store))
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}
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} else {
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ConnectView(form: form) { connected in
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form.serverText = ""
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Servers.shared.current = connected.absoluteString
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}
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}
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}
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private var framed: some View {
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content
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.foregroundStyle(Palette.text)
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.tint(Palette.accent)
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.background(Palette.bg)
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.padding(connection == nil ? 0 : 3)
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.background(frameColor)
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.font(Fonts.font(13))
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.frame(minWidth: 640, minHeight: 400)
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}
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var body: some View {
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framed
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.toolbar {
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ToolbarItem(placement: .principal) {
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ServerPicker()
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}
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.sharedBackgroundVisibility(.hidden)
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}
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.toolbar(removing: .title)
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.toolbarBackgroundVisibility(.visible, for: .windowToolbar)
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.focusedSceneValue(\.serverWindow, focus)
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.onChange(of: Servers.shared.origins) { old, new in
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adopt(new.filter { !old.contains($0) })
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}
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.onAppear(perform: appeared)
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}
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private func appeared() {
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let openWindow = openWindow
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Servers.shared.openWindow = {
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openWindow(id: "main")
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}
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Notifier.shared.deliver()
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}
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private func adopt(_ candidates: [String]) {
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guard Servers.shared.current == nil, form.serverText.isEmpty, !form.connecting, let next = candidates.first else {
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return
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}
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Servers.shared.current = next
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}
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private func forget() {
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guard let current = Servers.shared.current else {
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return
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}
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form.serverText = current
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Servers.shared.current = nil
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Servers.shared.remove(current)
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}
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}
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struct ServerPicker: View {
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var body: some View {
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let servers = Servers.shared
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HStack(spacing: 4) {
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ForEach(servers.origins, id: \.self) { origin in
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ServerChip(origin: origin)
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}
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Button("+") {
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servers.current = nil
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}
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.buttonStyle(.plain)
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.foregroundStyle(servers.current == nil ? Palette.text : Palette.muted)
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.padding(.horizontal, 8)
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.padding(.vertical, 3)
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.help("Add Server")
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}
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.font(Fonts.font(13))
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.fixedSize()
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}
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}
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private struct ServerChip: View {
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let origin: String
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@ViewState private var hover = false
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var body: some View {
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let servers = Servers.shared
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let store = servers.connections[origin]?.store
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let questions = store?.inbox.count ?? 0
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let summaries = store?.unreadSummaries ?? 0
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let current = servers.current == origin
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Button {
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servers.current = origin
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} label: {
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HStack(spacing: 6) {
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Circle()
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.fill(store == nil ? .clear : servers.color(origin))
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.stroke(servers.color(origin))
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.frame(width: 8, height: 8)
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Text(serverName(origin))
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.fontWeight(current ? .bold : .regular)
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if questions > 0 {
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Badge(count: questions)
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.help("open questions")
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}
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Text("99")
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.font(Fonts.font(11, weight: 700))
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.hidden()
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.overlay(alignment: .leading) {
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if summaries > 0 {
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Text("\(summaries)")
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.font(Fonts.font(11, weight: 700))
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.foregroundStyle(Palette.accent)
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.fixedSize()
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.help("Turn summaries you haven't read")
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}
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}
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}
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.foregroundStyle(hover || current ? Palette.text : questions > 0 ? Palette.warn : Palette.muted)
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.padding(.horizontal, 8)
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.padding(.vertical, 3)
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.background(questions > 0 ? Palette.warnTint : current ? Palette.surface : .clear, in: RoundedRectangle(cornerRadius: 6))
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.overlay(alignment: .bottom) {
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Rectangle()
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.fill(current ? servers.color(origin) : .clear)
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.frame(height: 2)
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.padding(.horizontal, 8)
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}
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.contentShape(Rectangle())
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}
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.buttonStyle(.plain)
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.help(store == nil ? "\(serverName(origin)): not connected" : serverName(origin))
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.onHover { hover = $0 }
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}
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}
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