Meiko & Energon
Energon
Hey Meiko, how about we design a micro‑workout timer that pushes you to a set of micro‑goals every minute and logs calories, so you can see your progress in real time?
Meiko
Sounds like a neat idea, but first we need a concrete definition of those micro‑goals. If it’s just “pushups every minute,” the timer will become a distraction, not a motivator. Also, logging calories requires a heart‑rate sensor or an estimate that changes with age, weight, and intensity—so decide how accurate you want that data. Do you want a web app or a smartwatch app? Each platform has its own timing precision and battery constraints. We can start with a simple CLI prototype that prints a countdown and a counter for reps, then layer on the calorie estimate. That way you can test the logic before committing to a full UI. Let me know which environment you’re targeting.
Energon
Let’s lock this on a smartwatch app, because the watch can keep a strict 1‑second clock, give you haptic alerts, and you can plug in a heart‑rate sensor for a better calorie estimate. Micro‑goals: 30 seconds “burst” push‑ups, count 10, rest 30, repeat. That keeps the mind focused, the timer useful, and the calorie math simple—just heart‑rate × minutes × 0.02. We’ll prototype in SwiftUI, then move to a full UI once the CLI logic looks good. Ready to code the 30‑second burst?
Meiko
Sure, but first let’s make the burst logic crystal clear so the watch won’t end up stuck in a loop. We need a state machine: burst → rest → burst. Each state runs for 30 seconds, and we count push‑ups only during burst. We’ll tap the heart‑rate sensor on every second to update calories. Also, keep an eye on the battery; a 1‑second timer plus haptic feedback can drain quickly. Let’s start with a simple SwiftUI view that toggles the state and shows the countdown. Once that’s stable, we can hook the sensor and add the calorie calculation. Time to write the first draft.
Energon
Got it—burst 30 seconds, rest 30 seconds, count reps only during burst, heart‑rate every second, battery‑check built in. Let’s draft that SwiftUI timer view now, keep it lean, and make sure the state machine flips cleanly. Once the UI shows the countdown right, we’ll hook up the sensor and calorie math. Let’s crush this!
Meiko
import SwiftUI
import Combine
struct BurstTimerView: View {
enum Phase { case burst, rest }
@State private var phase: Phase = .burst
@State private var timeLeft = 30
@State private var reps = 0
@State private var calories = 0.0
@State private var heartRate = 0
@State private var timerCancellable: Cancellable?
var body: some View {
VStack(spacing: 20) {
Text(phaseText)
.font(.largeTitle)
Text("\(timeLeft)")
.font(.system(size: 80))
.bold()
if phase == .burst {
Text("Reps: \(reps)")
.font(.title)
}
Text(String(format: "Calories: %.2f", calories))
.font(.title2)
Button(action: start) {
Text("Start")
}
}
.onAppear { checkBattery() }
}
var phaseText: String {
switch phase {
case .burst: return "Burst"
case .rest: return "Rest"
}
}
func start() {
timerCancellable = Timer.publish(every: 1, on: .main, in: .common)
.autoconnect()
.sink { _ in tick() }
}
func tick() {
// Heart‑rate sampling
heartRate = fetchHeartRate()
if phase == .burst {
// Simple push‑up count logic
reps += 1
calories += Double(heartRate) * 0.02
}
if timeLeft > 0 {
timeLeft -= 1
} else {
flipPhase()
}
}
func flipPhase() {
phase = (phase == .burst) ? .rest : .burst
timeLeft = 30
}
func fetchHeartRate() -> Int {
// Placeholder: replace with real sensor read
return Int.random(in: 60...140)
}
func checkBattery() {
let level = ProcessInfo.processInfo.batteryLevel
if level < 0.2 {
print("Battery low: \(level * 100)%")
}
}
}
struct BurstTimerView_Previews: PreviewProvider {
static var previews: some View {
BurstTimerView()
}
}
Energon
Nice starter, but a few tweaks to keep the watch happy. First, stop the timer when the view disappears—add .onDisappear to cancel timerCancellable. Also, the reps counter should only increase when you actually do a push‑up, so add a button or sensor trigger instead of auto‑increment each tick. For battery, use UIDevice.current.isBatteryMonitoringEnabled = true and listen to battery change notifications. Finally, add a tiny haptic when flipping phases so you know the switch. Keep it tight, keep it energetic!