[camera]move flashmode out to a separate file

Author: hellohuanlin

packages/camera/camera/ios/Classes/CameraPlugin.m

@@ -10,6 +10,7 @@
 #import <CoreMotion/CoreMotion.h>
 #import <libkern/OSAtomic.h>
 #import <uuid/uuid.h>
+#import "FlashMode.h"
 #import "FLTThreadSafeEventChannel.h"
 #import "FLTThreadSafeFlutterResult.h"
 #import "FLTThreadSafeMethodChannel.h"
@@ -113,34 +114,6 @@ - (void)captureOutput:(AVCapturePhotoOutput *)output
 }
 @end
 
-// Mirrors FlashMode in flash_mode.dart
-typedef enum {
-  FlashModeOff,
-  FlashModeAuto,
-  FlashModeAlways,
-  FlashModeTorch,
-} FlashMode;
-
-static FlashMode getFlashModeForString(NSString *mode) {
-  if ([mode isEqualToString:@"off"]) {
-    return FlashModeOff;
-  } else if ([mode isEqualToString:@"auto"]) {
-    return FlashModeAuto;
-  } else if ([mode isEqualToString:@"always"]) {
-    return FlashModeAlways;
-  } else if ([mode isEqualToString:@"torch"]) {
-    return FlashModeTorch;
-  } else {
-    NSError *error = [NSError errorWithDomain:NSCocoaErrorDomain
-                                         code:NSURLErrorUnknown
-                                     userInfo:@{
-                                       NSLocalizedDescriptionKey : [NSString
-                                           stringWithFormat:@"Unknown flash mode %@", mode]
-                                     }];
-    @throw error;
-  }
-}
-
 static OSType getVideoFormatFromString(NSString *videoFormatString) {
   if ([videoFormatString isEqualToString:@"bgra8888"]) {
     return kCVPixelFormatType_32BGRA;
@@ -152,20 +125,6 @@ static OSType getVideoFormatFromString(NSString *videoFormatString) {
   }
 }
 
-static AVCaptureFlashMode getAVCaptureFlashModeForFlashMode(FlashMode mode) {
-  switch (mode) {
-    case FlashModeOff:
-      return AVCaptureFlashModeOff;
-    case FlashModeAuto:
-      return AVCaptureFlashModeAuto;
-    case FlashModeAlways:
-      return AVCaptureFlashModeOn;
-    case FlashModeTorch:
-    default:
-      return -1;
-  }
-}
-
 // Mirrors ExposureMode in camera.dart
 typedef enum {
   ExposureModeAuto,

packages/camera/camera/ios/Classes/FlashMode.h

@@ -0,0 +1,24 @@
+//
+//  FlashMode.h
+//  camera
+//
+//  Created by Huan Lin on 1/25/22.
+//
+
+#import <AVFoundation/AVFoundation.h>
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+// Mirrors FlashMode in flash_mode.dart
+typedef enum {
+  FlashModeOff,
+  FlashModeAuto,
+  FlashModeAlways,
+  FlashModeTorch,
+} FlashMode;
+
+FlashMode getFlashModeForString(NSString *mode);
+AVCaptureFlashMode getAVCaptureFlashModeForFlashMode(FlashMode mode);
+
+NS_ASSUME_NONNULL_END

packages/camera/camera/ios/Classes/FlashMode.m

@@ -0,0 +1,43 @@
+//
+//  FlashMode.m
+//  camera
+//
+//  Created by Huan Lin on 1/25/22.
+//
+
+#import "FlashMode.h"
+
+FlashMode getFlashModeForString(NSString *mode) {
+  if ([mode isEqualToString:@"off"]) {
+    return FlashModeOff;
+  } else if ([mode isEqualToString:@"auto"]) {
+    return FlashModeAuto;
+  } else if ([mode isEqualToString:@"always"]) {
+    return FlashModeAlways;
+  } else if ([mode isEqualToString:@"torch"]) {
+    return FlashModeTorch;
+  } else {
+    NSError *error = [NSError errorWithDomain:NSCocoaErrorDomain
+                                         code:NSURLErrorUnknown
+                                     userInfo:@{
+                                       NSLocalizedDescriptionKey : [NSString
+                                           stringWithFormat:@"Unknown flash mode %@", mode]
+                                     }];
+    @throw error;
+  }
+}
+
+AVCaptureFlashMode getAVCaptureFlashModeForFlashMode(FlashMode mode) {
+  switch (mode) {
+    case FlashModeOff:
+      return AVCaptureFlashModeOff;
+    case FlashModeAuto:
+      return AVCaptureFlashModeAuto;
+    case FlashModeAlways:
+      return AVCaptureFlashModeOn;
+    case FlashModeTorch:
+    default:
+      return -1;
+  }
+}
+