Run SwiftFormat in GH Action (#28)

.github/workflows/validate-ios.yml

@@ -13,33 +13,30 @@ on:
       - 'ios/**'
 
 jobs:
-  lint:
+  SwiftLint:
-    name: SwiftLint
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - name: Run SwiftLint GitHub Action (--strict)
-        uses: norio-nomura/action-swiftlint@3.2.1
+        uses: norio-nomura/action-swiftlint@master
         with:
           args: --strict
         env:
           # DIFF_BASE: ${{ github.base_ref }}
           WORKING_DIRECTORY: ios
-  # TODO: Figure out how to run SwiftFormat in a GitHub action
+  SwiftFormat:
-  # SwiftFormat:
+    runs-on: macOS-latest
-  #   name: SwiftFormat
+    defaults:
-  #   description: 'https://github.com/nicklockwood/SwiftFormat'
+      run:
-  #   runs-on: ubuntu-latest
+        working-directory: ./ios
-    # defaults:
+    steps:
-    #   run:
+      - uses: actions/checkout@v2
-    #     working-directory: ./ios
-  #   steps:
-  #     - uses: actions/checkout@v2
 
-  #     - name: Format Swift code
+      - name: Install SwiftFormat
-  #       run: swiftformat --verbose .
+        run: brew install swiftformat
-  #       working-directory: ${{env.working-directory}}
 
-  #     - name: Verify formatted code is unchanged
+      - name: Format Swift code
-  #       run: git diff --exit-code HEAD
+        run: swiftformat --verbose .
-  #       working-directory: ${{env.working-directory}}
+
+      - name: Verify formatted code is unchanged
+        run: git diff --exit-code HEAD

ios/.swift-version

@@ -0,0 +1 @@
+5.2

ios/.swiftformat

@@ -1,3 +1,14 @@
 --allman false
 --indent 2
 --exclude Pods,Generated
+
+--disable andOperator
+--disable redundantReturn
+--disable wrapMultilineStatementBraces
+
+--enable organizeDeclarations
+--lifecycle didSetProps,requiresMainQueueSetup,view,methodQueue,getCameraView
+
+--enable markTypes
+
+--enable isEmpty

ios/.swiftlint.yml

@@ -18,7 +18,6 @@ opt_in_rules:
   - last_where
   - reduce_boolean
   - reduce_into
-  - sorted_first_last
   - yoda_condition
   - vertical_whitespace_opening_braces
   - vertical_whitespace_closing_braces

ios/CameraError.swift

@@ -8,10 +8,14 @@
 
 import Foundation
 
+// MARK: - PermissionError
+
 enum PermissionError: String {
   case microphone = "microphone-permission-denied"
   case camera = "camera-permission-denied"
 
+  // MARK: Internal
+
   var code: String {
     return rawValue
   }
@@ -26,6 +30,8 @@ enum PermissionError: String {
   }
 }
 
+// MARK: - ParameterError
+
 enum ParameterError {
   case invalid(unionName: String, receivedValue: String)
   case unsupportedOS(unionName: String, receivedValue: String, supportedOnOs: String)
@@ -33,6 +39,8 @@ enum ParameterError {
   case unsupportedInput(inputDescriptor: String)
   case invalidCombination(provided: String, missing: String)
 
+  // MARK: Internal
+
   var code: String {
     switch self {
     case .invalid:
@@ -64,6 +72,8 @@ enum ParameterError {
   }
 }
 
+// MARK: - DeviceError
+
 enum DeviceError: String {
   case configureError = "configuration-error"
   case noDevice = "no-device"
@@ -74,6 +84,8 @@ enum DeviceError: String {
   case focusNotSupported = "focus-not-supported"
   case notAvailableOnSimulator = "camera-not-available-on-simulator"
 
+  // MARK: Internal
+
   var code: String {
     return rawValue
   }
@@ -100,12 +112,16 @@ enum DeviceError: String {
   }
 }
 
+// MARK: - FormatError
+
 enum FormatError {
   case invalidFps(fps: Int)
   case invalidHdr
   case invalidFormat
   case invalidPreset(preset: String)
 
+  // MARK: Internal
+
   var code: String {
     switch self {
     case .invalidFormat:
@@ -133,10 +149,14 @@ enum FormatError {
   }
 }
 
+// MARK: - SessionError
+
 enum SessionError {
   case cameraNotReady
   case audioSessionSetupFailed(reason: String)
 
+  // MARK: Internal
+
   var code: String {
     switch self {
     case .cameraNotReady:
@@ -156,6 +176,8 @@ enum SessionError {
   }
 }
 
+// MARK: - CaptureError
+
 enum CaptureError {
   case invalidPhotoFormat
   case recordingInProgress
@@ -165,6 +187,8 @@ enum CaptureError {
   case invalidPhotoCodec
   case unknown(message: String? = nil)
 
+  // MARK: Internal
+
   var code: String {
     switch self {
     case .invalidPhotoFormat:
@@ -204,9 +228,13 @@ enum CaptureError {
   }
 }
 
+// MARK: - SystemError
+
 enum SystemError: String {
   case noManager = "no-camera-manager"
 
+  // MARK: Internal
+
   var code: String {
     return rawValue
   }
@@ -219,6 +247,8 @@ enum SystemError: String {
   }
 }
 
+// MARK: - CameraError
+
 enum CameraError: Error {
   case permission(_ id: PermissionError)
   case parameter(_ id: ParameterError)
@@ -229,6 +259,8 @@ enum CameraError: Error {
   case system(_ id: SystemError)
   case unknown(message: String? = nil)
 
+  // MARK: Internal
+
   var code: String {
     switch self {
     case let .permission(id: id):

ios/CameraView+TakePhoto.swift

@@ -8,9 +8,10 @@
 
 import AVFoundation
 
+// MARK: - TakePhotoOptions
+
 struct TakePhotoOptions {
-  var videoCodec: AVVideoCodecType?
+  // MARK: Lifecycle
-  var qualityPrioritization: String?
 
   init(fromDictionary dictionary: NSDictionary) {
     if let videoCodec = dictionary.value(forKey: "videoCodec") as? String {
@@ -18,6 +19,11 @@ struct TakePhotoOptions {
     }
     qualityPrioritization = dictionary.value(forKey: "qualityPrioritization") as? String
   }
+
+  // MARK: Internal
+
+  var videoCodec: AVVideoCodecType?
+  var qualityPrioritization: String?
 }
 
 extension CameraView {

ios/CameraView.swift

@@ -29,72 +29,10 @@ import UIKit
 private let propsThatRequireReconfiguration = ["cameraId", "enableDepthData", "enableHighResolutionCapture", "enablePortraitEffectsMatteDelivery", "preset", "onCodeScanned", "scannableCodes"]
 private let propsThatRequireDeviceReconfiguration = ["fps", "hdr", "lowLightBoost", "colorSpace"]
 
+// MARK: - CameraView
+
 final class CameraView: UIView {
-  // pragma MARK: Exported Properties
+  // MARK: Lifecycle
-  // props that require reconfiguring
-  @objc var cameraId: NSString?
-  @objc var enableDepthData = false
-  @objc var enableHighResolutionCapture: NSNumber? // nullable bool
-  @objc var enablePortraitEffectsMatteDelivery = false
-  @objc var preset: String?
-  @objc var scannableCodes: [String]?
-  // props that require format reconfiguring
-  @objc var format: NSDictionary?
-  @objc var fps: NSNumber?
-  @objc var hdr: NSNumber? // nullable bool
-  @objc var lowLightBoost: NSNumber? // nullable bool
-  @objc var colorSpace: NSString?
-  // other props
-  @objc var isActive = false
-  @objc var torch = "off"
-  @objc var zoom: NSNumber = 0.0 // in percent
-  // events
-  @objc var onInitialized: RCTDirectEventBlock?
-  @objc var onError: RCTDirectEventBlock?
-  @objc var onCodeScanned: RCTBubblingEventBlock?
-  @objc var enableZoomGesture: Bool = false {
-    didSet {
-      if enableZoomGesture {
-        addPinchGestureRecognizer()
-      } else {
-        removePinchGestureRecognizer()
-      }
-    }
-  }
-
-  var isReady: Bool = false
-  var isRunning: Bool {
-    return captureSession.isRunning
-  }
-
-  // pragma MARK: Private Properties
-  /// The serial execution queue for the camera preview layer (input stream) as well as output processing (take photo, record video, process metadata/barcodes)
-  internal let queue = DispatchQueue(label: "com.mrousavy.camera-queue", qos: .userInteractive, attributes: [], autoreleaseFrequency: .inherit, target: nil)
-  private let captureSession = AVCaptureSession()
-  internal var videoDeviceInput: AVCaptureDeviceInput?
-  internal var audioDeviceInput: AVCaptureDeviceInput?
-  internal var photoOutput: AVCapturePhotoOutput?
-  internal var movieOutput: AVCaptureMovieFileOutput?
-  internal var metadataOutput: AVCaptureMetadataOutput?
-  // CameraView+TakePhoto
-  internal var photoCaptureDelegates: [PhotoCaptureDelegate] = []
-  // CameraView+RecordVideo
-  internal var recordingDelegateResolver: RCTPromiseResolveBlock?
-  internal var recordingDelegateRejecter: RCTPromiseRejectBlock?
-  // CameraView+Zoom
-  internal var pinchGestureRecognizer: UIPinchGestureRecognizer?
-  internal var pinchScaleOffset: CGFloat = 1.0
-
-  // pragma MARK: Setup
-  override class var layerClass: AnyClass {
-    return AVCaptureVideoPreviewLayer.self
-  }
-
-  /// Convenience wrapper to get layer as its statically known type.
-  var videoPreviewLayer: AVCaptureVideoPreviewLayer {
-    // swiftlint:disable force_cast
-    return layer as! AVCaptureVideoPreviewLayer
-  }
 
   override init(frame: CGRect) {
     super.init(frame: frame)
@@ -114,26 +52,6 @@ final class CameraView: UIView {
                                               object: captureSession)
   }
 
-  override func removeFromSuperview() {
-    captureSession.stopRunning()
-    super.removeFromSuperview()
-  }
-
-  @objc
-  func sessionRuntimeError(notification: Notification) {
-    guard let error = notification.userInfo?[AVCaptureSessionErrorKey] as? AVError else {
-      return
-    }
-
-    if isActive {
-      // restart capture session after an error occured
-      queue.async {
-        self.captureSession.startRunning()
-      }
-    }
-    invokeOnError(.unknown(message: error.localizedDescription), cause: error as NSError)
-  }
-
   @available(*, unavailable)
   required init?(coder _: NSCoder) {
     fatalError("init(coder:) is not implemented.")
@@ -188,6 +106,159 @@ final class CameraView: UIView {
     }
   }
 
+  // MARK: Internal
+
+  // pragma MARK: Setup
+  override class var layerClass: AnyClass {
+    return AVCaptureVideoPreviewLayer.self
+  }
+
+  // pragma MARK: Exported Properties
+  // props that require reconfiguring
+  @objc var cameraId: NSString?
+  @objc var enableDepthData = false
+  @objc var enableHighResolutionCapture: NSNumber? // nullable bool
+  @objc var enablePortraitEffectsMatteDelivery = false
+  @objc var preset: String?
+  @objc var scannableCodes: [String]?
+  // props that require format reconfiguring
+  @objc var format: NSDictionary?
+  @objc var fps: NSNumber?
+  @objc var hdr: NSNumber? // nullable bool
+  @objc var lowLightBoost: NSNumber? // nullable bool
+  @objc var colorSpace: NSString?
+  // other props
+  @objc var isActive = false
+  @objc var torch = "off"
+  @objc var zoom: NSNumber = 0.0 // in percent
+  // events
+  @objc var onInitialized: RCTDirectEventBlock?
+  @objc var onError: RCTDirectEventBlock?
+  @objc var onCodeScanned: RCTBubblingEventBlock?
+  var isReady = false
+  // pragma MARK: Private Properties
+  /// The serial execution queue for the camera preview layer (input stream) as well as output processing (take photo, record video, process metadata/barcodes)
+  internal let queue = DispatchQueue(label: "com.mrousavy.camera-queue", qos: .userInteractive, attributes: [], autoreleaseFrequency: .inherit, target: nil)
+  internal var videoDeviceInput: AVCaptureDeviceInput?
+  internal var audioDeviceInput: AVCaptureDeviceInput?
+  internal var photoOutput: AVCapturePhotoOutput?
+  internal var movieOutput: AVCaptureMovieFileOutput?
+  internal var metadataOutput: AVCaptureMetadataOutput?
+  // CameraView+TakePhoto
+  internal var photoCaptureDelegates: [PhotoCaptureDelegate] = []
+  // CameraView+RecordVideo
+  internal var recordingDelegateResolver: RCTPromiseResolveBlock?
+  internal var recordingDelegateRejecter: RCTPromiseRejectBlock?
+  // CameraView+Zoom
+  internal var pinchGestureRecognizer: UIPinchGestureRecognizer?
+  internal var pinchScaleOffset: CGFloat = 1.0
+
+  @objc var enableZoomGesture = false {
+    didSet {
+      if enableZoomGesture {
+        addPinchGestureRecognizer()
+      } else {
+        removePinchGestureRecognizer()
+      }
+    }
+  }
+
+  var isRunning: Bool {
+    return captureSession.isRunning
+  }
+
+  /// Convenience wrapper to get layer as its statically known type.
+  var videoPreviewLayer: AVCaptureVideoPreviewLayer {
+    // swiftlint:disable force_cast
+    return layer as! AVCaptureVideoPreviewLayer
+  }
+
+  override func removeFromSuperview() {
+    captureSession.stopRunning()
+    super.removeFromSuperview()
+  }
+
+  @objc
+  func sessionRuntimeError(notification: Notification) {
+    guard let error = notification.userInfo?[AVCaptureSessionErrorKey] as? AVError else {
+      return
+    }
+
+    if isActive {
+      // restart capture session after an error occured
+      queue.async {
+        self.captureSession.startRunning()
+      }
+    }
+    invokeOnError(.unknown(message: error.localizedDescription), cause: error as NSError)
+  }
+
+  internal final func setTorchMode(_ torchMode: String) {
+    guard let device = videoDeviceInput?.device else {
+      return invokeOnError(.session(.cameraNotReady))
+    }
+    guard var torchMode = AVCaptureDevice.TorchMode(withString: torchMode) else {
+      return invokeOnError(.parameter(.invalid(unionName: "TorchMode", receivedValue: torch)))
+    }
+    if !captureSession.isRunning {
+      torchMode = .off
+    }
+    if device.torchMode == torchMode {
+      // no need to run the whole lock/unlock bs
+      return
+    }
+    if !device.hasTorch || !device.isTorchAvailable {
+      if torchMode == .off {
+        // ignore it, when it's off and not supported, it's off.
+        return
+      } else {
+        // torch mode is .auto or .on, but no torch is available.
+        return invokeOnError(.device(.torchUnavailable))
+      }
+    }
+    do {
+      try device.lockForConfiguration()
+      device.torchMode = torchMode
+      if torchMode == .on {
+        try device.setTorchModeOn(level: 1.0)
+      }
+      device.unlockForConfiguration()
+    } catch let error as NSError {
+      return invokeOnError(.device(.configureError), cause: error)
+    }
+  }
+
+  // pragma MARK: Event Invokers
+  internal final func invokeOnError(_ error: CameraError, cause: NSError? = nil) {
+    ReactLogger.log(level: .error, message: error.localizedDescription, alsoLogToJS: true)
+    guard let onError = self.onError else { return }
+
+    var causeDictionary: [String: Any]?
+    if let cause = cause {
+      causeDictionary = [
+        "code": cause.code,
+        "domain": cause.domain,
+        "message": cause.localizedDescription,
+        "details": cause.userInfo,
+      ]
+    }
+    onError([
+      "code": error.code,
+      "message": error.message,
+      "cause": causeDictionary ?? NSNull(),
+    ])
+  }
+
+  internal final func invokeOnInitialized() {
+    ReactLogger.log(level: .info, message: "Camera onInitialized()", alsoLogToJS: true)
+    guard let onInitialized = self.onInitialized else { return }
+    onInitialized([String: Any]())
+  }
+
+  // MARK: Private
+
+  private let captureSession = AVCaptureSession()
+
   // pragma MARK: Session, Device and Format Configuration
   /**
    Configures the Capture Session.
@@ -196,7 +267,7 @@ final class CameraView: UIView {
     isReady = false
 
     #if targetEnvironment(simulator)
-    return invokeOnError(.device(.notAvailableOnSimulator))
+      return invokeOnError(.device(.notAvailableOnSimulator))
     #endif
 
     guard cameraId != nil else {
@@ -295,7 +366,7 @@ final class CameraView: UIView {
     }
     captureSession.addOutput(photoOutput!)
     if videoDeviceInput!.device.position == .front {
-        photoOutput!.mirror()
+      photoOutput!.mirror()
     }
 
     // Video Output
@@ -308,7 +379,7 @@ final class CameraView: UIView {
     }
     captureSession.addOutput(movieOutput!)
     if videoDeviceInput!.device.position == .front {
-        movieOutput!.mirror()
+      movieOutput!.mirror()
     }
 
     // Barcode Scanning
@@ -422,66 +493,4 @@ final class CameraView: UIView {
       return invokeOnError(.device(.configureError), cause: error)
     }
   }
-
-  internal final func setTorchMode(_ torchMode: String) {
-    guard let device = videoDeviceInput?.device else {
-      return invokeOnError(.session(.cameraNotReady))
-    }
-    guard var torchMode = AVCaptureDevice.TorchMode(withString: torchMode) else {
-      return invokeOnError(.parameter(.invalid(unionName: "TorchMode", receivedValue: torch)))
-    }
-    if !captureSession.isRunning {
-      torchMode = .off
-    }
-    if device.torchMode == torchMode {
-      // no need to run the whole lock/unlock bs
-      return
-    }
-    if !device.hasTorch || !device.isTorchAvailable {
-      if torchMode == .off {
-        // ignore it, when it's off and not supported, it's off.
-        return
-      } else {
-        // torch mode is .auto or .on, but no torch is available.
-        return invokeOnError(.device(.torchUnavailable))
-      }
-    }
-    do {
-      try device.lockForConfiguration()
-      device.torchMode = torchMode
-      if torchMode == .on {
-        try device.setTorchModeOn(level: 1.0)
-      }
-      device.unlockForConfiguration()
-    } catch let error as NSError {
-      return invokeOnError(.device(.configureError), cause: error)
-    }
-  }
-
-  // pragma MARK: Event Invokers
-  internal final func invokeOnError(_ error: CameraError, cause: NSError? = nil) {
-    ReactLogger.log(level: .error, message: error.localizedDescription, alsoLogToJS: true)
-    guard let onError = self.onError else { return }
-
-    var causeDictionary: [String: Any]?
-    if let cause = cause {
-      causeDictionary = [
-        "code": cause.code,
-        "domain": cause.domain,
-        "message": cause.localizedDescription,
-        "details": cause.userInfo
-      ]
-    }
-    onError([
-      "code": error.code,
-      "message": error.message,
-      "cause": causeDictionary ?? NSNull(),
-    ])
-  }
-
-  internal final func invokeOnInitialized() {
-    ReactLogger.log(level: .info, message: "Camera onInitialized()", alsoLogToJS: true)
-    guard let onInitialized = self.onInitialized else { return }
-    onInitialized([String: Any]())
-  }
 }

ios/CameraViewManager.swift

@@ -11,17 +11,15 @@ import Foundation
 
 @objc(CameraViewManager)
 final class CameraViewManager: RCTViewManager {
-  // pragma MARK: Setup
+  // MARK: Lifecycle
-  override final func view() -> UIView! {
-    return CameraView()
-  }
 
   override static func requiresMainQueueSetup() -> Bool {
     return true
   }
 
-  override var methodQueue: DispatchQueue! {
+  // pragma MARK: Setup
-    return DispatchQueue.main
+  override final func view() -> UIView! {
+    return CameraView()
   }
 
   private func getCameraView(withTag tag: NSNumber) -> CameraView {
@@ -29,6 +27,12 @@ final class CameraViewManager: RCTViewManager {
     return bridge.uiManager.view(forReactTag: tag) as! CameraView
   }
 
+  // MARK: Internal
+
+  override var methodQueue: DispatchQueue! {
+    return DispatchQueue.main
+  }
+
   // pragma MARK: Exported Functions
   @objc
   final func startRecording(_ node: NSNumber, options: NSDictionary, onRecordCallback: @escaping RCTResponseSenderBlock) {
@@ -65,7 +69,7 @@ final class CameraViewManager: RCTViewManager {
       guard let movieOutput = component.movieOutput else {
         throw CameraError.session(SessionError.cameraNotReady)
       }
-      return movieOutput.availableVideoCodecTypes.map { $0.descriptor }
+      return movieOutput.availableVideoCodecTypes.map(\.descriptor)
     }
   }
 
@@ -76,26 +80,10 @@ final class CameraViewManager: RCTViewManager {
       guard let photoOutput = component.photoOutput else {
         throw CameraError.session(SessionError.cameraNotReady)
       }
-      return photoOutput.availablePhotoCodecTypes.map { $0.descriptor }
+      return photoOutput.availablePhotoCodecTypes.map(\.descriptor)
     }
   }
 
-  private final func getAllDeviceTypes() -> [AVCaptureDevice.DeviceType] {
-    var deviceTypes: [AVCaptureDevice.DeviceType] = []
-    if #available(iOS 13.0, *) {
-      deviceTypes.append(.builtInTripleCamera)
-      deviceTypes.append(.builtInDualWideCamera)
-      deviceTypes.append(.builtInUltraWideCamera)
-    }
-    if #available(iOS 11.1, *) {
-      deviceTypes.append(.builtInTrueDepthCamera)
-    }
-    deviceTypes.append(.builtInDualCamera)
-    deviceTypes.append(.builtInWideAngleCamera)
-    deviceTypes.append(.builtInTelephotoCamera)
-    return deviceTypes
-  }
-
   // pragma MARK: View Manager funcs
   @objc
   final func getAvailableCameraDevices(_ resolve: @escaping RCTPromiseResolveBlock, reject: @escaping RCTPromiseRejectBlock) {
@@ -104,7 +92,7 @@ final class CameraViewManager: RCTViewManager {
       return discoverySession.devices.map {
         return [
           "id": $0.uniqueID,
-          "devices": $0.physicalDevices.map { $0.deviceType.descriptor },
+          "devices": $0.physicalDevices.map(\.deviceType.descriptor),
           "position": $0.position.descriptor,
           "name": $0.localizedName,
           "hasFlash": $0.hasFlash,
@@ -155,4 +143,22 @@ final class CameraViewManager: RCTViewManager {
       resolve(result.descriptor)
     }
   }
+
+  // MARK: Private
+
+  private final func getAllDeviceTypes() -> [AVCaptureDevice.DeviceType] {
+    var deviceTypes: [AVCaptureDevice.DeviceType] = []
+    if #available(iOS 13.0, *) {
+      deviceTypes.append(.builtInTripleCamera)
+      deviceTypes.append(.builtInDualWideCamera)
+      deviceTypes.append(.builtInUltraWideCamera)
+    }
+    if #available(iOS 11.1, *) {
+      deviceTypes.append(.builtInTrueDepthCamera)
+    }
+    deviceTypes.append(.builtInDualCamera)
+    deviceTypes.append(.builtInWideAngleCamera)
+    deviceTypes.append(.builtInTelephotoCamera)
+    return deviceTypes
+  }
 }

ios/Extensions/AVCaptureDevice.Format+toDictionary.swift

@@ -23,7 +23,7 @@ extension AVCaptureDevice.Format {
 
   func toDictionary() -> [String: Any] {
     var dict: [String: Any] = [
-      "videoStabilizationModes": videoStabilizationModes.map { $0.descriptor },
+      "videoStabilizationModes": videoStabilizationModes.map(\.descriptor),
       "autoFocusSystem": autoFocusSystem.descriptor,
       "photoHeight": highResolutionStillImageDimensions.height,
       "photoWidth": highResolutionStillImageDimensions.width,
@@ -31,7 +31,7 @@ extension AVCaptureDevice.Format {
       "minISO": minISO,
       "fieldOfView": videoFieldOfView,
       "maxZoom": videoMaxZoomFactor,
-      "colorSpaces": supportedColorSpaces.map { $0.descriptor },
+      "colorSpaces": supportedColorSpaces.map(\.descriptor),
       "supportsVideoHDR": isVideoHDRSupported,
       "supportsPhotoHDR": false,
       "frameRateRanges": videoSupportedFrameRateRanges.map {

ios/Extensions/AVCaptureMovieFileOutput+mirror.swift

@@ -9,11 +9,11 @@
 import AVFoundation
 
 extension AVCaptureMovieFileOutput {
-    func mirror() {
+  func mirror() {
-        connections.forEach { (connection) in
+    connections.forEach { connection in
-            if connection.isVideoMirroringSupported {
+      if connection.isVideoMirroringSupported {
-                connection.isVideoMirrored = true
+        connection.isVideoMirrored = true
-            }
+      }
-        }
     }
+  }
 }

ios/Extensions/AVCapturePhotoOutput+mirror.swift

@@ -9,11 +9,11 @@
 import AVFoundation
 
 extension AVCapturePhotoOutput {
-    func mirror() {
+  func mirror() {
-        connections.forEach { (connection) in
+    connections.forEach { connection in
-            if connection.isVideoMirroringSupported {
+      if connection.isVideoMirroringSupported {
-                connection.isVideoMirrored = true
+        connection.isVideoMirrored = true
-            }
+      }
-        }
     }
+  }
 }

ios/PhotoCaptureDelegate.swift

@@ -10,8 +10,10 @@ import AVFoundation
 
 private var delegatesReferences: [NSObject] = []
 
+// MARK: - PhotoCaptureDelegate
+
 class PhotoCaptureDelegate: NSObject, AVCapturePhotoCaptureDelegate {
-  private let promise: Promise
+  // MARK: Lifecycle
 
   required init(promise: Promise) {
     self.promise = promise
@@ -19,6 +21,8 @@ class PhotoCaptureDelegate: NSObject, AVCapturePhotoCaptureDelegate {
     delegatesReferences.append(self)
   }
 
+  // MARK: Internal
+
   func photoOutput(_: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
     defer {
       delegatesReferences.removeAll(where: { $0 == self })
@@ -66,4 +70,8 @@ class PhotoCaptureDelegate: NSObject, AVCapturePhotoCaptureDelegate {
       return promise.reject(error: .capture(.unknown(message: error.localizedDescription)), cause: error as NSError)
     }
   }
+
+  // MARK: Private
+
+  private let promise: Promise
 }

ios/README.md

@@ -17,4 +17,4 @@ This folder contains the iOS-platform-specific code for react-native-vision-came
 
 It is recommended that you work on the code using the Example project (`example/ios/VisionCameraExample.xcworkspace`), since that always includes the React Native header files, plus you can easily test changes that way.
 
-You can however still edit the library project here by opening `VisionCamera.xcodeproj`.
+You can however still edit the library project here by opening `VisionCamera.xcodeproj`, this has the advantage of **automatically formatting your Code** (swiftformat) and **showing you Linter errors** (swiftlint) when trying to build (<kbd>⌘</kbd>+<kbd>B</kbd>).

ios/React/Promise.swift

@@ -8,18 +8,21 @@
 
 import Foundation
 
+// MARK: - Promise
+
 /**
  * Represents a JavaScript Promise instance. `reject()` and `resolve()` should only be called once.
  */
 class Promise {
-  private let resolver: RCTPromiseResolveBlock
+  // MARK: Lifecycle
-  private let rejecter: RCTPromiseRejectBlock
 
   init(resolver: @escaping RCTPromiseResolveBlock, rejecter: @escaping RCTPromiseRejectBlock) {
     self.resolver = resolver
     self.rejecter = rejecter
   }
 
+  // MARK: Internal
+
   func reject(error: CameraError, cause: NSError?) {
     rejecter(error.code, error.message, cause)
   }
@@ -35,6 +38,11 @@ class Promise {
   func resolve() {
     resolve(nil)
   }
+
+  // MARK: Private
+
+  private let resolver: RCTPromiseResolveBlock
+  private let rejecter: RCTPromiseRejectBlock
 }
 
 /**

ios/React/ReactLogger.swift

@@ -10,6 +10,8 @@ import Foundation
 
 let context = "Camera"
 
+// MARK: - ReactLogger
+
 enum ReactLogger {
   static func log(level: RCTLogLevel, message: String, alsoLogToJS: Bool = false, file: String = #file, lineNumber: Int = #line) {
     RCTDefaultLogFunction(level, RCTLogSource.native, file, lineNumber as NSNumber, "\(context): \(message)")

ios/VideoCaptureDelegate.swift

@@ -14,9 +14,10 @@ import AVFoundation
 // once the delegate has been triggered once.
 private var delegateReferences: [NSObject] = []
 
+// MARK: - RecordingDelegateWithCallback
+
 class RecordingDelegateWithCallback: NSObject, AVCaptureFileOutputRecordingDelegate {
-  private let callback: RCTResponseSenderBlock // (video?, error?) => void
+  // MARK: Lifecycle
-  private let resetTorchMode: () -> Void
 
   init(callback: @escaping RCTResponseSenderBlock, resetTorchMode: @escaping () -> Void) {
     self.callback = callback
@@ -25,6 +26,8 @@ class RecordingDelegateWithCallback: NSObject, AVCaptureFileOutputRecordingDeleg
     delegateReferences.append(self)
   }
 
+  // MARK: Internal
+
   func fileOutput(_ output: AVCaptureFileOutput, didFinishRecordingTo outputFileURL: URL, from _: [AVCaptureConnection], error: Error?) {
     defer {
       self.resetTorchMode()
@@ -37,4 +40,9 @@ class RecordingDelegateWithCallback: NSObject, AVCaptureFileOutputRecordingDeleg
     let seconds = CMTimeGetSeconds(output.recordedDuration)
     return callback([["path": outputFileURL.absoluteString, "duration": seconds, "size": output.recordedFileSize], NSNull()])
   }
+
+  // MARK: Private
+
+  private let callback: RCTResponseSenderBlock // (video?, error?) => void
+  private let resetTorchMode: () -> Void
 }

ios/VisionCamera.xcodeproj/project.pbxproj

@@ -196,6 +196,7 @@
 			buildConfigurationList = 58B511EF1A9E6C8500147676 /* Build configuration list for PBXNativeTarget "VisionCamera" */;
 			buildPhases = (
 				B81F6C7625E515810008974A /* Run SwiftLint */,
+				B80D6CAB25F770FE006F2CB7 /* Run SwiftFormat */,
 				58B511D71A9E6C8500147676 /* Sources */,
 				58B511D81A9E6C8500147676 /* Frameworks */,
 				58B511D91A9E6C8500147676 /* CopyFiles */,
@@ -242,6 +243,24 @@
 /* End PBXProject section */
 
 /* Begin PBXShellScriptBuildPhase section */
+		B80D6CAB25F770FE006F2CB7 /* Run SwiftFormat */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+			);
+			name = "Run SwiftFormat";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "if which swiftformat >/dev/null; then\n  swiftformat .\nelse\n  echo \"warning: SwiftFormat not installed, download from https://github.com/nicklockwood/SwiftFormat\"\nfi\n";
+		};
 		B81F6C7625E515810008974A /* Run SwiftLint */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
@@ -258,7 +277,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "if which swiftlint >/dev/null; then\n  swiftlint autocorrect && swiftlint\nelse\n  echo \"warning: SwiftLint not installed, download from https://github.com/realm/SwiftLint\"\nfi\n";
+			shellScript = "if which swiftlint >/dev/null; then\n  swiftlint --fix && swiftlint\nelse\n  echo \"warning: SwiftLint not installed, download from https://github.com/realm/SwiftLint\"\nfi\n";
 		};
 /* End PBXShellScriptBuildPhase section */
 

package.json

@@ -35,10 +35,14 @@
     "example": "yarn --cwd example",
     "pods": "cd example && pod-install --quiet",
     "bootstrap": "yarn example && yarn && yarn pods",
-    "ktlint-fix": "ktlint -F android/**/*.kt*",
+    "ktlint": "scripts/ktlint.sh",
-    "swiftlint-fix": "cd ios && swiftlint autocorrect",
+    "swiftlint": "scripts/swiftlint.sh",
+    "swiftformat": "scripts/swiftformat.sh",
     "docs": "cd docs && yarn build"
   },
+  "pre-commit": [
+    "swiftformat"
+  ],
   "keywords": [
     "react-native",
     "ios",
@@ -81,6 +85,7 @@
     "eslint-plugin-react-native": "^3.10.0",
     "jest": "^26.0.1",
     "pod-install": "^0.1.0",
+    "pre-commit": "^1.2.2",
     "prettier": "^2.2.1",
     "react": "17.0.1",
     "react-native": "0.63.4",

scripts/ktlint.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if which ktlint >/dev/null; then
+  cd android && ktlint -F ./**/*.kt*
+else
+  echo "warning: KTLint not installed, download from https://github.com/pinterest/ktlint"
+fi

scripts/swiftformat.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if which swiftformat >/dev/null; then
+  cd ios && swiftformat .
+else
+  echo "warning: SwiftFormat not installed, download from https://github.com/nicklockwood/SwiftFormat"
+fi

scripts/swiftlint.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if which swiftlint >/dev/null; then
+  cd ios && swiftlint --fix && swiftlint
+else
+  echo "warning: SwiftLint not installed, download from https://github.com/realm/SwiftLint"
+fi

yarn.lock

@@ -2,11 +2,6 @@
 # yarn lockfile v1
 
 
-"@actions/core@^1.2.0":
-  version "1.2.6"
-  resolved "https://registry.yarnpkg.com/@actions/core/-/core-1.2.6.tgz#a78d49f41a4def18e88ce47c2cac615d5694bf09"
-  integrity sha512-ZQYitnqiyBc3D+k7LsgSBmMDVkOVidaagDG7j3fOym77jNunWRuYx7VSHa9GNfFZh+zh61xsCjRj4JxMZlDqTA==
-
 "@babel/code-frame@7.12.11":
   version "7.12.11"
   resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.12.11.tgz#f4ad435aa263db935b8f10f2c552d23fb716a63f"
@@ -1043,13 +1038,6 @@
     minimatch "^3.0.4"
     strip-json-comments "^3.1.1"
 
-"@firmnav/eslint-github-actions-formatter@^1.0.1":
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/@firmnav/eslint-github-actions-formatter/-/eslint-github-actions-formatter-1.0.1.tgz#dbedcc4d8a799faf9b709417981039819980aab0"
-  integrity sha512-KbhZwNPFuwoRWspUfoJISOeGZHGSm7tvdOC+uOUlbcY9LNmusRHHmBcq3KaorvW9WmmiOS/2EOo0nafFZ0gpEQ==
-  dependencies:
-    "@actions/core" "^1.2.0"
-
 "@hapi/address@2.x.x":
   version "2.1.4"
   resolved "https://registry.yarnpkg.com/@hapi/address/-/address-2.1.4.tgz#5d67ed43f3fd41a69d4b9ff7b56e7c0d1d0a81e5"
@@ -3035,7 +3023,7 @@ concat-map@0.0.1:
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
   integrity sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=
 
-concat-stream@^1.6.0:
+concat-stream@^1.4.7, concat-stream@^1.6.0:
   version "1.6.2"
   resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.6.2.tgz#904bdf194cd3122fc675c77fc4ac3d4ff0fd1a34"
   integrity sha512-27HBghJxjiZtIk3Ycvn/4kbJk/1uZuJFfuPEns6LaEvpvG1f0hTea8lilrouyo9mVc2GWdcEZ8OLoGmSADlrCw==
@@ -3289,7 +3277,7 @@ cosmiconfig@^5.0.5, cosmiconfig@^5.1.0:
     js-yaml "^3.13.1"
     parse-json "^4.0.0"
 
-cross-spawn@^5.1.0:
+cross-spawn@^5.0.1, cross-spawn@^5.1.0:
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-5.1.0.tgz#e8bd0efee58fcff6f8f94510a0a554bbfa235449"
   integrity sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=
@@ -7112,6 +7100,11 @@ os-name@4.0.0:
     macos-release "^2.2.0"
     windows-release "^4.0.0"
 
+os-shim@^0.1.2:
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/os-shim/-/os-shim-0.1.3.tgz#6b62c3791cf7909ea35ed46e17658bb417cb3917"
+  integrity sha1-a2LDeRz3kJ6jXtRuF2WLtBfLORc=
+
 os-tmpdir@^1.0.0, os-tmpdir@~1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/os-tmpdir/-/os-tmpdir-1.0.2.tgz#bbe67406c79aa85c5cfec766fe5734555dfa1274"
@@ -7436,6 +7429,15 @@ posix-character-classes@^0.1.0:
   resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
   integrity sha1-AerA/jta9xoqbAL+q7jB/vfgDqs=
 
+pre-commit@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/pre-commit/-/pre-commit-1.2.2.tgz#dbcee0ee9de7235e57f79c56d7ce94641a69eec6"
+  integrity sha1-287g7p3nI15X95xW186UZBpp7sY=
+  dependencies:
+    cross-spawn "^5.0.1"
+    spawn-sync "^1.0.15"
+    which "1.2.x"
+
 prelude-ls@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.2.1.tgz#debc6489d7a6e6b0e7611888cec880337d316396"
@@ -8480,6 +8482,14 @@ source-map@^0.7.3:
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.7.3.tgz#5302f8169031735226544092e64981f751750383"
   integrity sha512-CkCj6giN3S+n9qrYiBTX5gystlENnRW5jZeNLHpe6aue+SrHcG5VYwujhW9s4dY31mEGsxBDrHR6oI69fTXsaQ==
 
+spawn-sync@^1.0.15:
+  version "1.0.15"
+  resolved "https://registry.yarnpkg.com/spawn-sync/-/spawn-sync-1.0.15.tgz#b00799557eb7fb0c8376c29d44e8a1ea67e57476"
+  integrity sha1-sAeZVX63+wyDdsKdROih6mfldHY=
+  dependencies:
+    concat-stream "^1.4.7"
+    os-shim "^0.1.2"
+
 spdx-correct@^3.0.0:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-3.1.1.tgz#dece81ac9c1e6713e5f7d1b6f17d468fa53d89a9"
@@ -9381,6 +9391,13 @@ which-module@^2.0.0:
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-2.0.0.tgz#d9ef07dce77b9902b8a3a8fa4b31c3e3f7e6e87a"
   integrity sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=
 
+which@1.2.x:
+  version "1.2.14"
+  resolved "https://registry.yarnpkg.com/which/-/which-1.2.14.tgz#9a87c4378f03e827cecaf1acdf56c736c01c14e5"
+  integrity sha1-mofEN48D6CfOyvGs31bHNsAcFOU=
+  dependencies:
+    isexe "^2.0.0"
+
 which@^1.2.9:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/which/-/which-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"