344 lines
14 KiB
Swift
344 lines
14 KiB
Swift
import SwiftUI
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import Combine
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struct ConversationView: View {
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@ObservedObject var settings: SettingsStore
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@State private var sessionID = UUID()
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@State private var session: VoiceSession
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/// The exact server URL the current session was constructed with. Used to
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/// avoid redundant session replacement when the applied URL hasn't actually
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/// changed (e.g. re-applying the same value from Settings).
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@State private var activeServerURL: String
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/// Identity guard: prevents a second `.onChange` from starting a concurrent
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/// session replacement while the first is still disconnecting the old one.
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@State private var isReplacingSession = false
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/// Latest accepted server URL that has not yet been applied to a session.
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/// Coalesced: rapid Applies during an active replacement retain the newest
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/// value rather than dropping it. A single retained worker loop drains
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/// arbitrary pending URLs until none remain (Iteration 08 Item 2).
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@State private var pendingServerURL: String?
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@State private var composerText = ""
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@State private var connectError: String?
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@State private var tick = 0
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init(settings: SettingsStore) {
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self.settings = settings
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let initialSession = Self.makeSession(settings: settings)
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_session = State(initialValue: initialSession)
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_activeServerURL = State(initialValue: settings.trimmedServerURL)
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}
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/// Creates a session from the configured server URL. `SettingsStore.init`
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/// guarantees the stored value is always valid (legacy invalid values are
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/// sanitized to the documented default), so the failure branch is a safety
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/// net only.
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private static func makeSession(settings: SettingsStore) -> VoiceSession {
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let config = ServerConfig.parse(settings.trimmedServerURL)
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switch config {
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case .success(let value):
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return VoiceSession(config: value, tokenClient: TokenClient(config: value), settings: settings)
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case .failure:
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// Defensive: should be unreachable because SettingsStore sanitizes.
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let fallback = ServerConfig.parse(SettingsStore.defaultServerURL)
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if case .success(let value) = fallback {
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settings.serverURL = SettingsStore.defaultServerURL
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return VoiceSession(config: value, tokenClient: TokenClient(config: value), settings: settings)
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}
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fatalError("Unreachable: default server URL is valid")
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}
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}
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var body: some View {
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NavigationStack {
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VStack(spacing: 0) {
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statusHeader
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TranscriptListView(
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events: session.transcriptHandler.events,
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onClear: {
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// Atomically clear the canonical visible collection,
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// dedupe state, and persistence so Clear is truthful.
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session.transcriptHandler.clearAll()
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}
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)
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composer
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}
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.navigationTitle("Hope Voice")
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.toolbar { toolbarContent }
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.id(sessionID)
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.onAppear {
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if case .failure(let error) = ServerConfig.parse(settings.trimmedServerURL) {
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connectError = error.localizedDescription
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}
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}
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.onChange(of: settings.textMode) { _, newValue in
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guard session.isReady else { return }
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Task { await session.applyTextMode(newValue) }
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}
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}
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.onReceive(session.objectWillChange.receive(on: RunLoop.main)) { _ in
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tick &+= 1
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}
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.onChange(of: settings.serverURL) { _, newValue in
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// The URL field now uses explicit Apply semantics (SettingsView),
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// so this fires only when the user has applied a value that passed
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// validation. Coalesce rapid accepted values: every accepted Apply
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// writes `pendingServerURL` (latest wins). A single retained worker
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// loop drains arbitrary pending URLs until none remain, covering
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// A→B→C semantics where C arrives while B is disconnecting
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// (Iteration 08 Item 2).
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let trimmed = newValue.trimmingCharacters(in: .whitespacesAndNewlines)
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guard !trimmed.isEmpty, case .success = ServerConfig.parse(trimmed) else { return }
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pendingServerURL = trimmed
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// Start the worker if not already active. The loop consumes
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// pending values until empty, so a single Task handles any number
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// of rapid Applies without nested tasks.
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guard !isReplacingSession else { return }
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isReplacingSession = true
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Task { @MainActor [settings] in
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while let url = self.pendingServerURL {
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self.pendingServerURL = nil
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guard url != self.activeServerURL else { continue }
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let oldSession = self.session
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await oldSession.disconnect()
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self.activeServerURL = url
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self.sessionID = UUID()
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// Construct from the captured validated config, not by
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// rereading settings.serverURL (which may have changed
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// during disconnect).
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switch ServerConfig.parse(url) {
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case .success(let config):
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self.session = VoiceSession(config: config, tokenClient: TokenClient(config: config), settings: settings)
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case .failure:
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let fallback = ServerConfig.parse(SettingsStore.defaultServerURL)
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if case .success(let value) = fallback {
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self.session = VoiceSession(config: value, tokenClient: TokenClient(config: value), settings: settings)
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} else {
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fatalError("Unreachable: default server URL is valid")
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}
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}
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}
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self.isReplacingSession = false
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}
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}
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}
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private var statusHeader: some View {
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VStack(spacing: 12) {
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OrbView(state: orbState)
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Text(statusText)
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.font(.headline)
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if session.state == .ready, session.stateModel.isThinkingChipVisible {
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Label("Thinking…", systemImage: "ellipsis")
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.font(.caption)
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.padding(.horizontal, 10)
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.padding(.vertical, 4)
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.background(.orange.opacity(0.2), in: Capsule())
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}
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if session.state == .ready, !settings.textMode {
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micMeter
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}
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if session.state == .ready, settings.textMode {
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Text("Barge in anytime — type to reply")
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.font(.caption)
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.foregroundStyle(.secondary)
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}
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if let agent = session.agent {
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Text("Agent: \(agent.name ?? agent.identity)")
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.font(.caption)
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.foregroundStyle(.secondary)
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}
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if session.state == .ready {
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Text("\(Voices.display(for: settings.voiceID) ?? settings.voiceID) · \(session.selectedModel ?? settings.modelID ?? "—")")
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.font(.caption)
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.foregroundStyle(.secondary)
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}
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if session.state == .ready {
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HStack(spacing: 16) {
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// The mic toggle is disabled in text mode to enforce the
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// privacy invariant at the UI level as well (Finding 4).
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Toggle(isOn: Binding(
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get: { !session.isMuted },
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set: { newValue in Task { await session.setMuted(!newValue) } }
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)) {
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Label(session.isMuted ? "Muted" : "Mic on", systemImage: session.isMuted ? "mic.slash" : "mic")
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}
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.toggleStyle(.button)
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.disabled(settings.textMode)
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Toggle("Text mode", isOn: textModeBinding)
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.toggleStyle(.button)
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}
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}
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if session.state == .ready, session.isReconnecting {
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Label("Connection lost — reconnecting…", systemImage: "arrow.triangle.2.circlepath")
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.font(.footnote)
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.foregroundStyle(.orange)
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.frame(maxWidth: .infinity, alignment: .leading)
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}
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if let micError = session.micError {
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Label(micError, systemImage: "exclamationmark.triangle")
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.font(.footnote)
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.foregroundStyle(.orange)
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.frame(maxWidth: .infinity, alignment: .leading)
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}
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if let connectError {
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Label(connectError, systemImage: "exclamationmark.triangle")
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.font(.footnote)
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.foregroundStyle(.red)
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}
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}
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.padding()
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}
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private var micMeter: some View {
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GeometryReader { geo in
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ZStack(alignment: .leading) {
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Capsule()
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.fill(Color(.systemFill))
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Capsule()
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.fill(Color.green.gradient)
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.frame(width: min(geo.size.width, geo.size.width * session.stateModel.micLevel * 2.5))
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}
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}
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.frame(height: 4)
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}
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private var textModeBinding: Binding<Bool> {
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$settings.textMode
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}
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private var composer: some View {
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HStack(spacing: 8) {
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switch session.state {
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case .idle, .failed:
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Button(action: startSession) {
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Label("Start", systemImage: "phone.fill")
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}
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.buttonStyle(.borderedProminent)
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case .connecting, .waitingAgent, .tearingDown:
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ProgressView()
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case .ready:
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TextField(settings.textMode ? "Type a message…" : "Voice mode active",
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text: $composerText,
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axis: .vertical)
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.textFieldStyle(.roundedBorder)
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.lineLimit(1...4)
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.disabled(!settings.textMode)
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Button(action: sendComposer) {
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Image(systemName: "arrow.up.circle.fill")
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.font(.title2)
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}
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.accessibilityLabel("Send message")
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.disabled(!settings.textMode || composerText.isEmpty)
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Button(role: .destructive, action: endSession) {
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Image(systemName: "phone.down.fill")
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}
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.accessibilityLabel("End conversation")
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}
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}
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.padding()
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}
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@ToolbarContentBuilder
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private var toolbarContent: some ToolbarContent {
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ToolbarItem(placement: .topBarTrailing) {
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NavigationLink {
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TaskPanelView(taskStore: session.taskStore)
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} label: {
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Image(systemName: "tray.full")
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.overlay(alignment: .topTrailing) {
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if session.taskStore.activeCount > 0 {
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Text("\(session.taskStore.activeCount)")
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.font(.caption2.weight(.bold))
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.foregroundStyle(.white)
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.padding(3)
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.background(Color.red, in: Circle())
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.offset(x: 6, y: -6)
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}
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}
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}
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.accessibilityLabel("Background tasks")
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}
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ToolbarItem(placement: .topBarTrailing) {
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NavigationLink {
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MediaPanelView(playerController: session.mediaController, settings: settings)
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} label: {
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Image(systemName: "music.note")
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}
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.accessibilityLabel("Media player")
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}
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ToolbarItem(placement: .topBarTrailing) {
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NavigationLink {
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SettingsView(settings: settings, session: session)
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} label: {
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Image(systemName: "gearshape")
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}
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.accessibilityLabel("Settings")
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}
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}
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private var orbState: OrbView.OrbState {
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switch session.state {
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case .idle: return .idle
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case .connecting, .waitingAgent, .tearingDown: return .connecting
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case .ready:
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guard !settings.textMode else { return .idle }
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switch session.stateModel.phase {
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case .idle: return .idle
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case .connecting: return .connecting
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case .listening: return .listening
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case .thinking: return .thinking
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case .speaking: return .speaking
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}
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case .failed: return .failed
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}
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}
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private var statusText: String {
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switch session.state {
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case .idle: return "Ready to connect"
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case .connecting: return "Connecting…"
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case .waitingAgent: return "Waiting for agent…"
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case .tearingDown: return "Cleaning up…"
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case .ready:
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if settings.textMode { return "Text mode" }
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switch session.stateModel.phase {
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case .listening: return "Listening"
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case .thinking: return "Thinking it through"
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case .speaking: return "Hope is speaking"
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default: return "Ready when you are"
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}
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case .failed(let message): return "Failed: \(message)"
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}
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}
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private func startSession() {
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connectError = nil
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// Starting a conversation preserves the restored last-50 history; only
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// the explicit Clear button erases it.
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Task { await session.connect() }
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}
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private func endSession() {
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Task { await session.disconnect() }
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}
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private func sendComposer() {
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let text = composerText.trimmingCharacters(in: .whitespacesAndNewlines)
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guard !text.isEmpty else { return }
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composerText = ""
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Task {
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do {
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try await session.sendText(text)
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} catch {
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connectError = error.localizedDescription
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}
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}
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}
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}
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#Preview {
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ConversationView(settings: SettingsStore())
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}
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