feat: Add pauseRecording and resumeRecording 🔥 (#911)

* feat: Add `pauseRecording` and `resumeRecording` (iOS)

* feat: Add `pauseRecording` and `resumeRecording` (Android)

* feat: Add `pauseRecording` and `resumeRecording` (JS)

* fix: Simplify Swift code for Recording

android/src/main/java/com/mrousavy/camera/CameraView+RecordVideo.kt

@@ -82,6 +82,30 @@ fun CameraView.startRecording(options: ReadableMap, onRecordCallback: Callback)
   })
 }
 
+@SuppressLint("RestrictedApi")
+fun CameraView.pauseRecording() {
+  if (videoCapture == null) {
+    throw CameraNotReadyError()
+  }
+  if (activeVideoRecording == null) {
+    throw NoRecordingInProgressError()
+  }
+
+  activeVideoRecording!!.pause()
+}
+
+@SuppressLint("RestrictedApi")
+fun CameraView.resumeRecording() {
+  if (videoCapture == null) {
+    throw CameraNotReadyError()
+  }
+  if (activeVideoRecording == null) {
+    throw NoRecordingInProgressError()
+  }
+
+  activeVideoRecording!!.resume()
+}
+
 @SuppressLint("RestrictedApi")
 fun CameraView.stopRecording() {
   if (videoCapture == null) {

android/src/main/java/com/mrousavy/camera/CameraViewModule.kt

@@ -115,6 +115,24 @@ class CameraViewModule(reactContext: ReactApplicationContext) : ReactContextBase
     }
   }
 
+  @ReactMethod
+  fun pauseRecording(viewTag: Int, promise: Promise) {
+    withPromise(promise) {
+      val view = findCameraView(viewTag)
+      view.pauseRecording()
+      return@withPromise null
+    }
+  }
+
+  @ReactMethod
+  fun resumeRecording(viewTag: Int, promise: Promise) {
+    withPromise(promise) {
+      val view = findCameraView(viewTag)
+      view.resumeRecording()
+      return@withPromise null
+    }
+  }
+
   @ReactMethod
   fun stopRecording(viewTag: Int, promise: Promise) {
     withPromise(promise) {

ios/CameraView+RecordVideo.swift

@@ -161,30 +161,28 @@ extension CameraView: AVCaptureVideoDataOutputSampleBufferDelegate, AVCaptureAud
     }
   }
 
-  // TODO: Implement for JS
   func pauseRecording(promise: Promise) {
     cameraQueue.async {
       withPromise(promise) {
-        if self.isRecording {
-          self.isRecording = false
-          return nil
-        } else {
+        guard self.recordingSession != nil else {
+          // there's no active recording!
           throw CameraError.capture(.noRecordingInProgress)
         }
+        self.isRecording = false
+        return nil
       }
     }
   }
 
-  // TODO: Implement for JS
   func resumeRecording(promise: Promise) {
     cameraQueue.async {
       withPromise(promise) {
-        if !self.isRecording {
-          self.isRecording = true
-          return nil
-        } else {
+        guard self.recordingSession != nil else {
+          // there's no active recording!
           throw CameraError.capture(.noRecordingInProgress)
         }
+        self.isRecording = true
+        return nil
       }
     }
   }

ios/CameraViewManager.m

@@ -54,6 +54,8 @@ RCT_EXPORT_VIEW_PROPERTY(onViewReady, RCTDirectEventBlock);
 
 // Camera View Functions
 RCT_EXTERN_METHOD(startRecording:(nonnull NSNumber *)node options:(NSDictionary *)options onRecordCallback:(RCTResponseSenderBlock)onRecordCallback);
+RCT_EXTERN_METHOD(pauseRecording:(nonnull NSNumber *)node resolve:(RCTPromiseResolveBlock)resolve reject:(RCTPromiseRejectBlock)reject);
+RCT_EXTERN_METHOD(resumeRecording:(nonnull NSNumber *)node resolve:(RCTPromiseResolveBlock)resolve reject:(RCTPromiseRejectBlock)reject);
 RCT_EXTERN_METHOD(stopRecording:(nonnull NSNumber *)node resolve:(RCTPromiseResolveBlock)resolve reject:(RCTPromiseRejectBlock)reject);
 RCT_EXTERN_METHOD(takePhoto:(nonnull NSNumber *)node options:(NSDictionary *)options resolve:(RCTPromiseResolveBlock)resolve reject:(RCTPromiseRejectBlock)reject);
 RCT_EXTERN_METHOD(focus:(nonnull NSNumber *)node point:(NSDictionary *)point resolve:(RCTPromiseResolveBlock)resolve reject:(RCTPromiseRejectBlock)reject);

ios/CameraViewManager.swift

@@ -49,6 +49,18 @@ final class CameraViewManager: RCTViewManager {
     component.startRecording(options: options, callback: onRecordCallback)
   }
 
+  @objc
+  final func pauseRecording(_ node: NSNumber, resolve: @escaping RCTPromiseResolveBlock, reject: @escaping RCTPromiseRejectBlock) {
+    let component = getCameraView(withTag: node)
+    component.pauseRecording(promise: Promise(resolver: resolve, rejecter: reject))
+  }
+
+  @objc
+  final func resumeRecording(_ node: NSNumber, resolve: @escaping RCTPromiseResolveBlock, reject: @escaping RCTPromiseRejectBlock) {
+    let component = getCameraView(withTag: node)
+    component.resumeRecording(promise: Promise(resolver: resolve, rejecter: reject))
+  }
+
   @objc
   final func stopRecording(_ node: NSNumber, resolve: @escaping RCTPromiseResolveBlock, reject: @escaping RCTPromiseRejectBlock) {
     let component = getCameraView(withTag: node)

src/Camera.tsx

@@ -190,6 +190,63 @@ export class Camera extends React.PureComponent<CameraProps> {
       throw tryParseNativeCameraError(e);
     }
   }
+
+  /**
+   * Pauses the current video recording.
+   *
+   * @throws {@linkcode CameraCaptureError} When any kind of error occured while pausing the video recording. Use the {@linkcode CameraCaptureError.code | code} property to get the actual error
+   *
+   * @example
+   * ```ts
+   * // Start
+   * await camera.current.startRecording()
+   * await timeout(1000)
+   * // Pause
+   * await camera.current.pauseRecording()
+   * await timeout(500)
+   * // Resume
+   * await camera.current.resumeRecording()
+   * await timeout(2000)
+   * // Stop
+   * const video = await camera.current.stopRecording()
+   * ```
+   */
+  public async pauseRecording(): Promise<void> {
+    try {
+      return await CameraModule.pauseRecording(this.handle);
+    } catch (e) {
+      throw tryParseNativeCameraError(e);
+    }
+  }
+
+  /**
+   * Resumes a currently paused video recording.
+   *
+   * @throws {@linkcode CameraCaptureError} When any kind of error occured while resuming the video recording. Use the {@linkcode CameraCaptureError.code | code} property to get the actual error
+   *
+   * @example
+   * ```ts
+   * // Start
+   * await camera.current.startRecording()
+   * await timeout(1000)
+   * // Pause
+   * await camera.current.pauseRecording()
+   * await timeout(500)
+   * // Resume
+   * await camera.current.resumeRecording()
+   * await timeout(2000)
+   * // Stop
+   * const video = await camera.current.stopRecording()
+   * ```
+   */
+  public async resumeRecording(): Promise<void> {
+    try {
+      return await CameraModule.resumeRecording(this.handle);
+    } catch (e) {
+      throw tryParseNativeCameraError(e);
+    }
+  }
+
   /**
    * Stop the current video recording.
    *