Recordings interface

main/Recordings/VCRecordings.swift

@@ -0,0 +1,73 @@
+import UIKit
+
+class VCRecordings: UIViewController {
+	private var currentRecording: Recording?
+	private var recordingTimer: Timer?
+	
+	@IBOutlet private var timeLabel: UILabel!
+	@IBOutlet private var startButton: UIButton!
+	
+	override func viewDidLoad() {
+		// Duplicate font attributes but set monospace
+		let traits = timeLabel.font.fontDescriptor.object(forKey: .traits) as? [UIFontDescriptor.TraitKey: Any] ?? [:]
+		let weight = traits[.weight] as? CGFloat ?? UIFont.Weight.regular.rawValue
+		timeLabel.font = UIFont.monospacedDigitSystemFont(ofSize: timeLabel.font.pointSize, weight: UIFont.Weight(rawValue: weight))
+		// hide timer if not running
+		updateUI(setRecording: false, animated: false)
+		currentRecording = DBWrp.recordingGetCurrent()
+	}
+	
+	override func viewDidAppear(_ animated: Bool) {
+		if currentRecording != nil { startTimer(animate: false) }
+	}
+	
+	override func viewWillDisappear(_ animated: Bool) {
+		stopTimer(animate: false)
+	}
+	
+	@IBAction private func recordingButtonTapped(_ sender: UIButton) {
+		if recordingTimer == nil {
+			currentRecording = DBWrp.recordingStartNew()
+			startTimer(animate: true)
+		} else {
+			stopTimer(animate: true)
+			DBWrp.recordingStopAll()
+			(children.first as! TVCPreviousRecords).stopRecording(currentRecording!)
+			currentRecording = nil // otherwise it will restart
+		}
+	}
+	
+	private func startTimer(animate: Bool) {
+		guard let r = currentRecording, r.stop == nil else {
+			return
+		}
+		recordingTimer = Timer.repeating(0.173, call: #selector(timerCallback(_:)), on: self, userInfo: r.start.toDate())
+		updateUI(setRecording: true, animated: animate)
+	}
+	
+	@objc private func timerCallback(_ sender: Timer) {
+		timeLabel.text = TimeFormat.since(sender.userInfo as! Date, millis: true)
+	}
+	
+	private func stopTimer(animate: Bool) {
+		recordingTimer?.invalidate()
+		recordingTimer = nil
+		updateUI(setRecording: false, animated: animate)
+	}
+	
+	private func updateUI(setRecording: Bool, animated: Bool) {
+		let title = setRecording ? "Stop Recording" : "Start New Recording"
+		let color = setRecording ? UIColor.systemRed : nil
+		let yT = setRecording ? 0 : -timeLabel.frame.height
+		let yB = (setRecording ? 1 : 0.5) * (startButton.superview!.frame.height - startButton.frame.height)
+		if !animated { // else title will flash
+			startButton.titleLabel?.text = title
+		}
+		UIView.animate(withDuration: animated ? 0.3 : 0) {
+			self.timeLabel.frame.origin.y = yT
+			self.startButton.frame.origin.y = yB
+			self.startButton.setTitle(title, for: .normal)
+			self.startButton.setTitleColor(color, for: .normal)
+		}
+	}
+}