From 1ad1fccd37baeb061ba2fc515ccf381092ece054 Mon Sep 17 00:00:00 2001
From: Chris McGehee <chris.mcgehee@gmail.com>
Date: Mon, 26 Sep 2022 05:51:39 -0700
Subject: [PATCH] Added ability to pause scanning

---
 Sources/CodeScanner/CodeScanner.swift           |  6 +++++-
 Sources/CodeScanner/ScannerViewController.swift | 12 ++++++++++--
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/Sources/CodeScanner/CodeScanner.swift b/Sources/CodeScanner/CodeScanner.swift
index ca52dfc..8b71a67 100644
--- a/Sources/CodeScanner/CodeScanner.swift
+++ b/Sources/CodeScanner/CodeScanner.swift
@@ -66,6 +66,7 @@ public struct CodeScannerView: UIViewControllerRepresentable {
     public var simulatedData = ""
     public var shouldVibrateOnSuccess: Bool
     public var isTorchOn: Bool
+    public var isScannerPaused: Bool
     public var isGalleryPresented: Binding<Bool>
     public var videoCaptureDevice: AVCaptureDevice?
     public var completion: (Result<ScanResult, ScanError>) -> Void
@@ -79,6 +80,7 @@ public struct CodeScannerView: UIViewControllerRepresentable {
         simulatedData: String = "",
         shouldVibrateOnSuccess: Bool = true,
         isTorchOn: Bool = false,
+        isScannerPaused: Bool = false,
         isGalleryPresented: Binding<Bool> = .constant(false),
         videoCaptureDevice: AVCaptureDevice? = AVCaptureDevice.default(for: .video),
         completion: @escaping (Result<ScanResult, ScanError>) -> Void
@@ -91,19 +93,21 @@ public struct CodeScannerView: UIViewControllerRepresentable {
         self.simulatedData = simulatedData
         self.shouldVibrateOnSuccess = shouldVibrateOnSuccess
         self.isTorchOn = isTorchOn
+        self.isScannerPaused = isScannerPaused
         self.isGalleryPresented = isGalleryPresented
         self.videoCaptureDevice = videoCaptureDevice
         self.completion = completion
     }
 
     public func makeUIViewController(context: Context) -> ScannerViewController {
-        return ScannerViewController(showViewfinder: showViewfinder, parentView: self)
+        return ScannerViewController(showViewfinder: showViewfinder, isScannerPaused: isScannerPaused, parentView: self)
     }
 
     public func updateUIViewController(_ uiViewController: ScannerViewController, context: Context) {
         uiViewController.parentView = self
         uiViewController.updateViewController(
             isTorchOn: isTorchOn,
+            isScannerPaused: isScannerPaused,
             isGalleryPresented: isGalleryPresented.wrappedValue,
             isManualCapture: scanMode == .manual,
             isManualSelect: manualSelect
diff --git a/Sources/CodeScanner/ScannerViewController.swift b/Sources/CodeScanner/ScannerViewController.swift
index c34ba56..5f231db 100644
--- a/Sources/CodeScanner/ScannerViewController.swift
+++ b/Sources/CodeScanner/ScannerViewController.swift
@@ -19,6 +19,7 @@ extension CodeScannerView {
         var didFinishScanning = false
         var lastTime = Date(timeIntervalSince1970: 0)
         private let showViewfinder: Bool
+        private var isScannerPaused: Bool
         
         private var isGalleryShowing: Bool = false {
             didSet {
@@ -29,14 +30,18 @@ extension CodeScannerView {
             }
         }
 
-        public init(showViewfinder: Bool = false, parentView: CodeScannerView) {
+        public init(showViewfinder: Bool = false, isScannerPaused: Bool, parentView: CodeScannerView) {
             self.parentView = parentView
             self.showViewfinder = showViewfinder
+            self.isScannerPaused = isScannerPaused
+            
             super.init(nibName: nil, bundle: nil)
         }
 
         required init?(coder: NSCoder) {
             self.showViewfinder = false
+            self.isScannerPaused = false
+            
             super.init(coder: coder)
         }
         
@@ -390,7 +395,7 @@ extension CodeScannerView {
         }
         #endif
         
-        func updateViewController(isTorchOn: Bool, isGalleryPresented: Bool, isManualCapture: Bool, isManualSelect: Bool) {
+        func updateViewController(isTorchOn: Bool, isScannerPaused: Bool, isGalleryPresented: Bool, isManualCapture: Bool, isManualSelect: Bool) {
             if let backCamera = AVCaptureDevice.default(for: AVMediaType.video),
                backCamera.hasTorch
             {
@@ -403,6 +408,8 @@ extension CodeScannerView {
                 openGallery()
             }
             
+            self.isScannerPaused = isScannerPaused
+            
             #if !targetEnvironment(simulator)
             showManualCaptureButton(isManualCapture)
             showManualSelectButton(isManualSelect)
@@ -426,6 +433,7 @@ extension CodeScannerView {
                 guard let readableObject = metadataObject as? AVMetadataMachineReadableCodeObject else { return }
                 guard let stringValue = readableObject.stringValue else { return }
                 guard didFinishScanning == false else { return }
+                guard isScannerPaused == false else { return }
                 let result = ScanResult(string: stringValue, type: readableObject.type)
 
                 switch parentView.scanMode {