Files
workouts/Workouts Watch App/Views/ExerciseProgressView.swift
T
rzen 8f69497b24 Make the live run two-way: drive from either device
The propped-up iPhone now runs the real ExerciseProgressView for a live
watch workout instead of a read-only mirror, and the live-run channel is
symmetric — either device can drive the flow and the other follows.

Each page transition is classified human / auto / remote: only human
transitions (swipe, Start, One More, swipe-back reset) are broadcast and
recorded by the actor; auto-advances (rest / timed-work countdown) record
locally but aren't sent, since both devices reach them independently off
the shared wall-clock anchors; an applied remote frame jumps the page
without re-recording or re-broadcasting. That rule is also what stops an
echo loop.

- PhoneConnectivityBridge gains sendLiveProgress/sendLiveEnded (the
  missing phone->watch direction); WatchConnectivityBridge receives
  frames into an observable liveIncoming via a new didReceiveMessage
  route. Both share one increasing per-run version sequence so the
  stale-frame guard works across the two devices' counters.
- Both ExerciseProgressViews gain an incomingFrame input + applyIncoming
  (syncing setCount for a remote One More); the iPhone one gains the
  liveSnapshot/broadcast machinery the watch already had.
- New LiveRunCoverView wraps the real driver for the cover (resolves the
  workout, persists via SyncEngine, wires the live channel + close);
  ContentView presents it; LiveProgressMirrorView is removed.

Claude-Session: https://claude.ai/code/session_01SCv7zvGFcKy47KSTnTLxRe
2026-06-20 22:11:05 -04:00

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//
// ExerciseProgressView.swift
// Workouts Watch App
//
// Copyright 2025 Rouslan Zenetl. All Rights Reserved.
//
import SwiftUI
import WatchKit
/// Runs a single exercise as a horizontally-paged flow, mirroring the iPhone's:
///
/// [Ready] Work Rest Work Work Finish
///
/// A **Ready?** page leads in *only* when the exercise hasn't been started yet (a resumed
/// exercise jumps straight to its first unfinished set). Rep-based **work** phases count
/// *up* (brand purple) and the user swipes on when done; **timed** work phases and
/// **rests** count *down* (rest in gray), ping once per second in the final three
/// seconds, then auto-advance. Sliding past the final set reaches a **Finish** page with
/// **One More** and an auto-firing **Done**. Swiping all the way back to Ready resets the
/// run from scratch.
///
/// A dot row tracks progress with one marker per work set the active set drawn as a
/// wider dash, with the gap widening at the rest you're currently in.
struct ExerciseProgressView: View {
@Environment(\.dismiss) private var dismiss
/// The shared working workout document owned by the parent. We mutate the matching
/// log in place and ask the parent to forward each change through the bridge
/// driving the UI from this doc (not the cache) avoids losing rapid edits to the
/// read-after-write race.
@Binding var doc: WorkoutDocument
let logID: String
let onChange: () -> Void
/// Broadcasts the current flow position so a propped-up iPhone can mirror the run live
/// (ephemeral; see `LiveProgress`). `onLiveEnded` fires when we leave the flow. Only
/// *human* transitions are broadcast an auto-advance (rest/timed-work end) isn't, since
/// the mirror reaches it independently off the same wall-clock anchors.
let onLive: (LiveProgress) -> Void
let onLiveEnded: () -> Void
/// The latest live-run frame the *phone* sent for this run, to follow when it drives a
/// transition (ephemeral; nil when the phone isn't driving). Applying it jumps our page
/// without re-broadcasting or re-recording the originating device owns the durable write.
var incomingFrame: LiveProgress?
/// Rest length between sets, shared with the phone via the same defaults key.
@AppStorage("restSeconds") private var restSeconds: Int = 45
/// Auto-Done countdown on the Finish page read so the mirror can show the same timer.
@AppStorage("doneCountdownSeconds") private var doneCountdownSeconds: Int = 5
/// Planned set count for this run. `One More` bumps it (and the log's `sets`).
@State private var setCount: Int
@State private var currentPage: Int
@State private var showingCancelConfirm = false
@State private var didRestorePage = false
/// Why `currentPage` last changed, so the page observer knows whether to broadcast it.
/// A human swipe leaves this `nil` ( treated as human); programmatic moves set it.
@State private var pageChangeCause: PageChangeCause?
/// Highest remote frame version we've applied, so a redelivery doesn't re-jump.
@State private var lastAppliedVersion = 0
private enum PageChangeCause { case auto, remote }
/// True when this run opened on a resumed set (in-progress) rather than the Ready
/// page. Such a run re-asserts its resume page after the first layout and ignores the
/// transient TabView snap-to-0, so it isn't reset on open.
@State private var startsResumed: Bool
/// Forces the starting page (used only by the DEBUG screenshot host). When set it
/// also suppresses the Ready page so the index is a plain work/rest cycle offset.
private let debugInitialPage: Int?
init(doc: Binding<WorkoutDocument>, logID: String, onChange: @escaping () -> Void, onLive: @escaping (LiveProgress) -> Void = { _ in }, onLiveEnded: @escaping () -> Void = {}, incomingFrame: LiveProgress? = nil, debugInitialPage: Int? = nil) {
self._doc = doc
self.logID = logID
self.onChange = onChange
self.onLive = onLive
self.onLiveEnded = onLiveEnded
self.incomingFrame = incomingFrame
self.debugInitialPage = debugInitialPage
let log = doc.wrappedValue.logs.first { $0.id == logID }
let sets = max(1, log?.sets ?? 1)
_setCount = State(initialValue: sets)
let notStarted = (log?.status ?? WorkoutStatus.notStarted.rawValue) == WorkoutStatus.notStarted.rawValue
// The Ready page always leads the flow (except in the screenshot host). A
// not-started run opens on it; an in-progress run opens on its first unfinished
// set and re-asserts that page past the TabView's snap-to-0 on first layout.
let ready = debugInitialPage == nil
_startsResumed = State(initialValue: ready && !notStarted)
let base = ready ? 1 : 0
// Resume on the first unfinished set's work page (clamped to the last set).
let completed = min(max(0, log?.currentStateIndex ?? 0), sets - 1)
let resume = base + completed * 2
_currentPage = State(initialValue: debugInitialPage ?? (notStarted ? 0 : resume))
}
private var log: WorkoutLogDocument? {
doc.logs.first { $0.id == logID }
}
/// The **Ready?** page always leads the flow, so a resumed run can swipe back to it
/// (which resets the exercise). Suppressed only for the screenshot host, which pins an
/// explicit page. Derived from the immutable `debugInitialPage`, so it stays stable for
/// the life of the screen the page-index math below depends on it.
private var showsReady: Bool { debugInitialPage == nil }
/// Offset of the work/rest cycle: `1` when a Ready page leads, else `0`.
private var base: Int { showsReady ? 1 : 0 }
/// Work/rest pages: Work, Rest, , Work N sets + (N1) rests = 2N 1.
private var cycleCount: Int { setCount * 2 - 1 }
/// Ready (`base`) + cycle (`2N 1`) + Finish (`1`).
private var totalPages: Int { base + cycleCount + 1 }
/// The first unfinished set's work page, used to resume an in-progress run.
private var resumePage: Int {
let completed = min(max(0, log?.currentStateIndex ?? 0), setCount - 1)
return base + completed * 2
}
/// Position within the work/rest cycle for the current page `nil` on the Ready
/// and Finish pages (which show no dots).
private var currentCycleIndex: Int? {
let c = currentPage - base
return (0..<cycleCount).contains(c) ? c : nil
}
/// Work-only progress model for the dot row: one marker per set, a dash on the set
/// being worked, and a doubled gap straddling the rest you're currently in.
private var workDots: WorkPhaseDots.Model? {
guard let c = currentCycleIndex else { return nil }
if c.isMultiple(of: 2) {
let set = c / 2
return .init(setCount: setCount, activeSet: set, restAfterSet: nil, completed: set)
} else {
let set = (c - 1) / 2
return .init(setCount: setCount, activeSet: nil, restAfterSet: set, completed: set + 1)
}
}
private var detail: String {
guard let log else { return "" }
if LoadType(rawValue: log.loadType) == .duration {
return Self.durationLabel(log.durationSeconds)
}
return "\(log.reps) reps"
}
/// Timed exercise: the work phase counts *down* from its duration (and auto-advances),
/// rather than counting *up* until the user swipes on.
private var isDuration: Bool {
guard let log else { return false }
return LoadType(rawValue: log.loadType) == .duration
}
/// Per-set work duration for a timed exercise.
private var workDurationSeconds: Int {
max(1, log?.durationSeconds ?? 1)
}
/// One-line plan summary for the Ready page, e.g. "4 sets × 8 reps".
private var readySummary: String {
let setsText = "\(setCount) set\(setCount == 1 ? "" : "s")"
return detail.isEmpty ? setsText : "\(setsText) × \(detail)"
}
var body: some View {
TabView(selection: $currentPage) {
ForEach(0..<totalPages, id: \.self) { index in
page(for: index)
.tag(index)
}
}
.tabViewStyle(.page(indexDisplayMode: .never))
.overlay(alignment: .bottom) {
if let dots = workDots {
WorkPhaseDots(model: dots)
.padding(.bottom, 2)
}
}
.toolbar {
ToolbarItem(placement: .cancellationAction) {
Button {
showingCancelConfirm = true
} label: {
Image(systemName: "xmark")
}
}
}
.confirmationDialog("Cancel Exercise?", isPresented: $showingCancelConfirm, titleVisibility: .visible) {
Button("Cancel Exercise", role: .destructive) { dismiss() }
Button("Continue", role: .cancel) { }
}
.onChange(of: currentPage) { oldPage, newPage in
// Ignore page changes until the initial resume settles, so the TabView's
// transient snap-to-0 on first layout can't reset an in-progress run.
guard didRestorePage else { return }
let cause = pageChangeCause
pageChangeCause = nil
switch cause {
case .remote:
// The phone already recorded and owns this transition just follow it.
break
case .auto:
// Rest / timed-work auto-advance: record forward progress, but don't
// broadcast the mirror reaches this point on its own synchronized timer.
recordProgress(for: newPage)
case .none:
// A human swipe. Swiping back from the first set to Ready wipes the run
// (only the adjacent 10 swipe resets a stray far jump never does); any
// other page records forward progress. Human transitions are broadcast.
if showsReady && newPage == 0 && oldPage == base {
resetExercise()
} else {
recordProgress(for: newPage)
}
broadcastLive(for: newPage)
}
}
.onChange(of: incomingFrame) { _, frame in
if let frame { applyIncoming(frame) }
}
.onAppear {
guard !didRestorePage else { return }
if startsResumed {
// Resume on the first unfinished set. A paged TabView can settle on page 0
// on first layout, so re-assert the resume page (now and once more after
// this run loop) before honoring page changes otherwise that snap would
// land on, and reset at, the Ready page.
jumpToResumePage()
Task { @MainActor in
jumpToResumePage()
finishRestore()
}
} else {
// Not-started opens on the Ready page; the screenshot host pins its own.
finishRestore()
}
}
.onDisappear {
// Leaving the flow (cancel / done / back) stop the phone mirror.
guard debugInitialPage == nil else { return }
onLiveEnded()
}
}
// MARK: - Live mirror
/// Finish the initial-page restore, then either follow an in-progress remote driver or, if
/// we're the one starting the run, announce our position to the mirror.
private func finishRestore() {
didRestorePage = true
if let frame = incomingFrame, frame.logID == logID {
applyIncoming(frame)
} else {
broadcastLive(for: currentPage)
}
}
/// Push the current flow position to a mirroring iPhone. The anchor is stamped *now* the
/// page just became active so the mirror's timer lines up with this device's.
private func broadcastLive(for page: Int) {
guard debugInitialPage == nil, let snapshot = liveSnapshot(for: page) else { return }
onLive(snapshot)
}
/// Follow a transition the phone made: jump to the frame's page (matching its set count
/// for a remote One More) without re-broadcasting or re-recording it the phone owns the
/// durable write, which arrives separately over the document sync.
private func applyIncoming(_ frame: LiveProgress) {
guard didRestorePage, frame.logID == logID, frame.version > lastAppliedVersion else { return }
lastAppliedVersion = frame.version
if frame.setCount != setCount { setCount = frame.setCount }
let target = page(forPhase: frame.phase, setIndex: frame.setIndex)
guard target != currentPage else { return }
pageChangeCause = .remote
withAnimation { currentPage = target }
}
/// Inverse of `liveSnapshot`'s pageframe mapping: a frame's phase/set page index.
private func page(forPhase phase: LiveRunPhase, setIndex: Int) -> Int {
let set = min(max(0, setIndex), max(0, setCount - 1))
switch phase {
case .ready: return showsReady ? 0 : base
case .work: return base + set * 2
case .rest: return base + set * 2 + 1
case .finish: return base + cycleCount
}
}
/// Build the live-run frame for a given page: phase, the set it pertains to, and the
/// wall-clock anchors the mirror counts off. Count-down phases (rest, timed work, finish)
/// carry an end anchor; a rep-based work set counts up and leaves it `nil`.
private func liveSnapshot(for page: Int) -> LiveProgress? {
guard let log else { return nil }
let now = Date()
func frame(_ phase: LiveRunPhase, setIndex: Int, end: Date?) -> LiveProgress {
LiveProgress(
workoutID: doc.id,
logID: logID,
exerciseName: log.exerciseName,
phase: phase,
setIndex: setIndex,
setCount: setCount,
detail: detail,
phaseStart: now,
phaseEnd: end,
version: 0
)
}
if showsReady && page == 0 {
return frame(.ready, setIndex: 0, end: nil)
}
let cycleIndex = page - base
if cycleIndex == cycleCount {
return frame(.finish, setIndex: max(0, setCount - 1),
end: now.addingTimeInterval(Double(max(1, doneCountdownSeconds))))
} else if cycleIndex.isMultiple(of: 2) {
let set = cycleIndex / 2
let end = isDuration ? now.addingTimeInterval(Double(workDurationSeconds)) : nil
return frame(.work, setIndex: set, end: end)
} else {
let set = (cycleIndex - 1) / 2 // the rest follows this set
return frame(.rest, setIndex: set, end: now.addingTimeInterval(Double(max(1, restSeconds))))
}
}
/// Move to the resume page without animation, only if we're not already there
/// (so a re-assert after a TabView snap-to-0 is a no-op in the common case).
private func jumpToResumePage() {
let target = resumePage
guard currentPage != target else { return }
var transaction = Transaction()
transaction.disablesAnimations = true
withTransaction(transaction) { currentPage = target }
}
@ViewBuilder
private func page(for index: Int) -> some View {
let isActive = index == currentPage
if showsReady && index == 0 {
ReadyPhaseView(summary: readySummary, onStart: start)
} else {
let cycleIndex = index - base
if cycleIndex == cycleCount {
// Finish page confirm Done (auto-fires) or add One More.
FinishPhaseView(
isActive: isActive,
onDone: { completeExercise(); dismiss() },
onOneMore: addSet
)
} else if cycleIndex.isMultiple(of: 2) {
let setNumber = cycleIndex / 2 + 1
if isDuration {
// Timed work set count down from the planned duration, then
// auto-advance (and buzz) the same way a rest does.
CountdownPhaseView(
header: "\(setNumber) of \(setCount)",
tint: .workTimer,
seconds: workDurationSeconds,
isActive: isActive
) {
withAnimation { advance(from: index) }
}
} else {
// Rep-based work set count up; the user swipes left when done.
WorkPhaseView(
setNumber: setNumber,
totalSets: setCount,
detail: detail,
isActive: isActive
)
}
} else {
// Rest phase. Auto-advances to the next work page when the timer hits zero.
CountdownPhaseView(
header: "Rest",
tint: .restTimer,
seconds: restSeconds,
isActive: isActive
) {
withAnimation { advance(from: index) }
}
}
}
}
// MARK: - Mutations
/// Leave the Ready page for the first work phase, marking the exercise started.
private func start() {
beginExercise()
withAnimation { currentPage = base }
}
/// Programmatically move one page right (used by the rest auto-advance), guarding
/// against overrun if the user swiped away in the meantime. Tagged `.auto` so the page
/// observer records progress but doesn't broadcast it (the mirror auto-advances too).
private func advance(from index: Int) {
guard currentPage == index, index + 1 < totalPages else { return }
pageChangeCause = .auto
currentPage = index + 1
}
/// Flip a not-yet-started exercise to in-progress the moment the user taps Start.
private func beginExercise() {
guard let i = doc.logs.firstIndex(where: { $0.id == logID }) else { return }
guard doc.logs[i].status == WorkoutStatus.notStarted.rawValue else { return }
doc.logs[i].status = WorkoutStatus.inProgress.rawValue
recomputeWorkoutStatus()
doc.updatedAt = Date()
onChange()
}
/// Append a bonus set from the Finish page: mark every prior set done, grow the
/// plan, and slide forward into the bonus set's work phase.
private func addSet() {
let newCount = setCount + 1
if let i = doc.logs.firstIndex(where: { $0.id == logID }) {
doc.logs[i].sets = newCount
doc.logs[i].currentStateIndex = newCount - 1 // every prior set is now complete
doc.logs[i].status = WorkoutStatus.inProgress.rawValue
doc.logs[i].completed = false
recomputeWorkoutStatus()
doc.updatedAt = Date()
onChange()
}
withAnimation {
setCount = newCount
currentPage += 1
}
}
/// Map a page to completed-set count and record forward progress.
///
/// Paging tops out at `setCount 1` completed sets the final set is marked done
/// only by an explicit **Done** (`completeExercise`). Progress is **monotonic**:
/// completing a work phase advances the count (and forwards it to the phone), but
/// swiping back or a transient TabView snap to page 0 never un-counts a set.
private func recordProgress(for pageIndex: Int) {
if showsReady && pageIndex == 0 { return } // Ready page records nothing
let cycleIndex = pageIndex - base
let reached = min(max(0, (cycleIndex + 1) / 2), setCount - 1)
guard let i = doc.logs.firstIndex(where: { $0.id == logID }) else { return }
guard reached > doc.logs[i].currentStateIndex else { return }
doc.logs[i].currentStateIndex = reached
doc.logs[i].status = WorkoutStatus.inProgress.rawValue
doc.logs[i].completed = false
recomputeWorkoutStatus()
doc.updatedAt = Date()
onChange()
}
/// Swiping back to the **Ready?** page starts the exercise over from scratch.
private func resetExercise() {
guard let i = doc.logs.firstIndex(where: { $0.id == logID }) else { return }
let log = doc.logs[i]
// Skip the write if it's already pristine (e.g. landing on Ready before any set).
guard log.currentStateIndex != 0
|| log.status != WorkoutStatus.notStarted.rawValue
|| log.completed else { return }
doc.logs[i].currentStateIndex = 0
doc.logs[i].status = WorkoutStatus.notStarted.rawValue
doc.logs[i].completed = false
recomputeWorkoutStatus()
doc.updatedAt = Date()
onChange()
}
private func completeExercise() {
guard let i = doc.logs.firstIndex(where: { $0.id == logID }) else { return }
doc.logs[i].currentStateIndex = setCount
doc.logs[i].status = WorkoutStatus.completed.rawValue
doc.logs[i].completed = true
recomputeWorkoutStatus()
doc.updatedAt = Date()
onChange()
}
private func recomputeWorkoutStatus() {
let statuses = doc.logs.map { WorkoutStatus(rawValue: $0.status) ?? .notStarted }
let allCompleted = !statuses.isEmpty && statuses.allSatisfy { $0 == .completed }
let anyInProgress = statuses.contains { $0 == .inProgress }
let allNotStarted = statuses.allSatisfy { $0 == .notStarted }
if allCompleted {
doc.status = WorkoutStatus.completed.rawValue
doc.end = Date()
} else if anyInProgress || !allNotStarted {
doc.status = WorkoutStatus.inProgress.rawValue
doc.end = nil
} else {
doc.status = WorkoutStatus.notStarted.rawValue
doc.end = nil
}
}
// MARK: - Formatting
static func durationLabel(_ seconds: Int) -> String {
let mins = seconds / 60
let secs = seconds % 60
if mins > 0 && secs > 0 { return "\(mins)m \(secs)s" }
if mins > 0 { return "\(mins) min" }
return "\(secs) sec"
}
}
// MARK: - Haptics
/// The haptic vocabulary used across the flow (set start, countdown ping, rest end, done).
private enum WorkoutHaptic {
case start, tick, stop, success
@MainActor
func play() {
switch self {
case .start: WKInterfaceDevice.current().play(.start)
case .tick: WKInterfaceDevice.current().play(.notification)
case .stop: WKInterfaceDevice.current().play(.stop)
case .success: WKInterfaceDevice.current().play(.success)
}
}
}
// MARK: - Phase Colors
/// watchOS is always dark, so these are static (matching the iPhone's dark-mode tints):
/// brand purple for work, light gray for rest.
private extension Color {
static let workTimer = Color(red: 0.66, green: 0.45, blue: 0.96)
static let restTimer = Color(white: 0.74)
}
// MARK: - Phase Timer Layout
/// Shared skeleton for the work and rest pages so their timers use an identical font and
/// land at exactly the same spot: a header line, the big timer, then a footer line. The
/// footer reserves its height even when empty, keeping the timer centered the same way on
/// both pages.
private struct PhaseTimerLayout<Content: View>: View {
let header: String
let footer: String
let tint: Color
@ViewBuilder var timer: Content
var body: some View {
VStack(spacing: 4) {
Text(header)
.font(.caption)
.foregroundStyle(.secondary)
timer
.font(.system(size: 50, weight: .bold, design: .rounded))
.monospacedDigit()
.foregroundStyle(tint)
Text(footer.isEmpty ? " " : footer)
.font(.caption)
.foregroundStyle(.secondary)
}
.frame(maxWidth: .infinity, maxHeight: .infinity)
}
}
// MARK: - Work Phase Dots
/// Progress row with one marker per work set. The set being worked is drawn as a wider
/// dash; during a rest every marker is a plain dot and the gap straddling that rest grows
/// to about double, hinting at the pause between the set that just ended and the next one.
/// Completed sets are full strength, upcoming ones dimmed.
private struct WorkPhaseDots: View {
struct Model: Equatable {
let setCount: Int
/// The set currently being worked drawn as a dash. `nil` during a rest.
let activeSet: Int?
/// The set just completed; the gap *after* its dot doubles. `nil` during work.
let restAfterSet: Int?
/// How many sets are fully done (for dimming the upcoming ones).
let completed: Int
}
let model: Model
// Geometry tune freely.
private let dotWidth: CGFloat = 5
private let dashWidth: CGFloat = 13
private let markerHeight: CGFloat = 5
private let gap: CGFloat = 5
private var restGap: CGFloat { gap * 2 }
var body: some View {
HStack(spacing: 0) {
ForEach(0..<model.setCount, id: \.self) { i in
marker(for: i)
if i < model.setCount - 1 {
Color.clear.frame(width: gapWidth(after: i), height: markerHeight)
}
}
}
.animation(.easeInOut(duration: 0.3), value: model)
}
private func marker(for i: Int) -> some View {
let isActive = model.activeSet == i
let isDone = i < model.completed
return Capsule()
.fill(Color.workTimer)
.frame(width: isActive ? dashWidth : dotWidth, height: markerHeight)
.opacity(isActive || isDone ? 1 : 0.45)
}
private func gapWidth(after i: Int) -> CGFloat {
model.restAfterSet == i ? restGap : gap
}
}
// MARK: - Phase Button Styling
private extension View {
/// Chunky, rounded, heavy treatment shared by the Start / Done / One More buttons:
/// a plump label (echoing the counter digits) over a full-width body.
func phaseButtonLabel() -> some View {
self
.font(.system(.headline, design: .rounded, weight: .heavy))
.frame(maxWidth: .infinity)
.padding(.vertical, 4)
}
}
// MARK: - Ready Phase
private struct ReadyPhaseView: View {
let summary: String
let onStart: () -> Void
var body: some View {
VStack(spacing: 8) {
Text("Ready?")
.font(.system(size: 30, weight: .bold, design: .rounded))
if !summary.isEmpty {
Text(summary)
.font(.caption)
.foregroundStyle(.secondary)
}
Button(action: onStart) {
Text("Start")
.phaseButtonLabel()
}
.buttonStyle(.borderedProminent)
.tint(.workTimer)
.buttonBorderShape(.capsule)
.padding(.top, 4)
}
.padding(.horizontal)
.frame(maxWidth: .infinity, maxHeight: .infinity)
}
}
// MARK: - Work Phase
private struct WorkPhaseView: View {
let setNumber: Int
let totalSets: Int
let detail: String
let isActive: Bool
/// Wall-clock anchor for the count-up stopwatch. Driving the display from a fixed
/// start date (rendered by SwiftUI's timer text) instead of incrementing a counter
/// on a run-loop `Timer` keeps it advancing in the Always-On / wrist-down state,
/// where that timer is throttled and stops firing.
@State private var startDate = Date()
var body: some View {
PhaseTimerLayout(header: "\(setNumber) of \(totalSets)", footer: detail, tint: .workTimer) {
Text(startDate, style: .timer)
}
.onAppear { if isActive { restart() } }
.onChange(of: isActive) { _, active in if active { restart() } }
}
private func restart() {
startDate = Date()
WorkoutHaptic.start.play()
}
}
// MARK: - Countdown Phase
/// A count-down phase used for both rests and timed work sets: counts down from
/// `seconds`, pings once per second in the final three, then buzzes and auto-advances at
/// zero. The header/tint distinguish the two uses (purple "N of M" work vs. gray "Rest").
///
/// The display is driven by a wall-clock window (so it keeps counting down in the
/// Always-On / wrist-down state), and the haptics + auto-advance are derived from
/// `endDate` rather than a decremented counter so they stay correct even after the
/// run-loop `Timer` was throttled while the wrist was down.
private struct CountdownPhaseView: View {
let header: String
var footer: String = ""
let tint: Color
let seconds: Int
let isActive: Bool
/// Invoked once the countdown reaches zero (auto-advance to the next page).
let onFinished: () -> Void
@State private var startDate = Date()
@State private var endDate = Date()
/// Lowest remaining-second we've already pinged, so a burst of catch-up ticks doesn't
/// double-buzz.
@State private var lastPingSecond = Int.max
/// Guards the auto-advance so it fires exactly once even if ticks pile up.
@State private var didFinish = false
private let ticker = Timer.publish(every: 1.0, on: .main, in: .common).autoconnect()
var body: some View {
PhaseTimerLayout(header: header, footer: footer, tint: tint) {
Text(timerInterval: startDate...endDate, countsDown: true)
}
.onAppear { if isActive { start() } }
.onChange(of: isActive) { _, active in if active { start() } }
.onReceive(ticker) { _ in tick() }
}
private func start() {
startDate = Date()
endDate = startDate.addingTimeInterval(Double(max(1, seconds)))
lastPingSecond = Int.max
didFinish = false
WorkoutHaptic.start.play()
}
private func tick() {
guard isActive, !didFinish else { return }
// Round up so the final whole second still pings before we reach zero.
let remaining = Int(ceil(endDate.timeIntervalSinceNow))
if remaining <= 0 {
// Time's up final cue and slide on. If the wrist was down the timer may have
// stalled; this then fires on the first tick once the app gets runtime again.
didFinish = true
WorkoutHaptic.stop.play()
onFinished()
} else if remaining <= 3 && remaining < lastPingSecond {
// Once-per-second countdown ping for the final three seconds.
lastPingSecond = remaining
WorkoutHaptic.tick.play()
}
}
}
// MARK: - Finish Phase
/// Terminal page after the last set. **Done** completes the exercise and dismisses and
/// fires automatically after a configurable countdown so the user doesn't have to tap with
/// sweaty hands. **One More** appends a bonus set instead.
private struct FinishPhaseView: View {
let isActive: Bool
let onDone: () -> Void
let onOneMore: () -> Void
@AppStorage("doneCountdownSeconds") private var doneCountdownSeconds: Int = 5
/// Wall-clock deadline for the auto-Done (same Always-On rationale as the rest timer).
/// `remaining` is what the Done button shows.
@State private var endDate = Date()
@State private var remaining = 0
/// Fires the auto-Done exactly once, and latches off while the page isn't active.
@State private var didFire = false
private let ticker = Timer.publish(every: 0.25, on: .main, in: .common).autoconnect()
var body: some View {
VStack(spacing: 8) {
Button(action: fire) {
Label(remaining > 0 ? "Done · \(remaining)" : "Done", systemImage: "checkmark")
.phaseButtonLabel()
}
.buttonStyle(.borderedProminent)
.tint(Color.workTimer)
.buttonBorderShape(.capsule)
Button(action: onOneMore) {
Label("One More", systemImage: "plus")
.phaseButtonLabel()
}
.buttonStyle(.bordered)
.buttonBorderShape(.capsule)
}
.padding(.horizontal)
.frame(maxWidth: .infinity, maxHeight: .infinity)
.onAppear { if isActive { start() } }
.onChange(of: isActive) { _, active in active ? start() : (didFire = true) }
.onReceive(ticker) { _ in tick() }
}
private func start() {
let total = max(1, doneCountdownSeconds)
endDate = Date().addingTimeInterval(Double(total))
remaining = total
didFire = false
}
private func tick() {
guard isActive, !didFire else { return }
let r = Int(ceil(endDate.timeIntervalSinceNow))
remaining = max(0, r)
if r <= 0 { fire() }
}
private func fire() {
guard !didFire else { return }
didFire = true
WorkoutHaptic.success.play()
onDone()
}
}