⚓️ :: [#18] 타이머 로직 구현

Sources/MindGymKit /MindGymKit.swift

@@ -111,3 +111,89 @@ public class MindGymStopWatchKit {
     }
 }
 
+public class MindGaGymKitTimer: NSObject {
+    private var initCounter: Double = 0.0
+    private var counter: Double = 0.0
+    private var timer: Timer?
+    private let timerSubject = PublishSubject<String>()
+
+    public var timeUpdate: Observable<String> {
+        return timerSubject.asObservable()
+    }
+
+    func setting(count: Double) {
+        initCounter = count
+        self.counter = count
+        let timeString = self.timeString(from: self.counter)
+        self.timerSubject.onNext(timeString)
+    }
+
+    func start() {
+        timer = Timer.scheduledTimer(withTimeInterval: 0.035, repeats: true) { [weak self] _ in
+            guard let self = self else { return }
+            self.counter -= 0.035
+            let timeString = self.timeString(from: self.counter)
+            self.timerSubject.onNext(timeString)
+        }
+    }
+
+    func stop() {
+        timer?.invalidate()
+        timer = nil
+
+    }
+
+    func restart() {
+        counter = initCounter
+        let timeString = self.timeString(from: self.counter)
+        self.timerSubject.onNext(timeString)
+    }
+
+    func reset() {
+        counter = 0.0
+        initCounter = 0.0
+        let timeString = self.timeString(from: self.counter)
+        self.timerSubject.onNext(timeString)
+    }
+
+    private func timeString(from counter: Double) -> String {
+
+        let hours: String = String(format: "%02d", Int(counter / 3600))
+        let minutes: String = String(format: "%02d", Int(counter / 60))
+        let seconds: String = String(format: "%02d", Int(counter.truncatingRemainder(dividingBy: 60)))
+        if counter / 3600 >= 1  {
+            return "\(hours) : \(minutes) : \(seconds)"
+        } else if counter / 60 > 1 {
+            return "\(minutes) : \(seconds)"
+        } else {
+            return "\(minutes) : \(seconds)"
+        }
+    }
+}
+
+public class MindGymTimerKit {
+
+    public let mainTimer: MindGaGymKitTimer = MindGaGymKitTimer()
+
+    public func setting(count: Double) {
+        mainTimer.setting(count: count)
+    }
+
+    public func startTimer() {
+        mainTimer.start()
+    }
+
+    public func stopTimer() {
+        mainTimer.stop()
+    }
+
+    public func resetTimer() {
+        mainTimer.reset()
+    }
+
+    public func restartTimer() {
+        mainTimer.restart()
+    }
+
+}
+