Merge pull request #4 from sharansingh00002/ios_implementation

Ios implementation done

ios/Classes/ThumbnailsPlugin.m

@@ -1,20 +1,53 @@
 #import "ThumbnailsPlugin.h"
+#import <AVFoundation/AVFoundation.h>
 
 @implementation ThumbnailsPlugin
 + (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
-  FlutterMethodChannel* channel = [FlutterMethodChannel
-      methodChannelWithName:@"thumbnails"
-            binaryMessenger:[registrar messenger]];
-  ThumbnailsPlugin* instance = [[ThumbnailsPlugin alloc] init];
-  [registrar addMethodCallDelegate:instance channel:channel];
+    FlutterMethodChannel* channel = [FlutterMethodChannel
+                                     methodChannelWithName:@"thumbnails"
+                                     binaryMessenger:[registrar messenger]];
+    ThumbnailsPlugin* instance = [[ThumbnailsPlugin alloc] init];
+    [registrar addMethodCallDelegate:instance channel:channel];
 }
 
 - (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
-  if ([@"getPlatformVersion" isEqualToString:call.method]) {
-    result([@"iOS " stringByAppendingString:[[UIDevice currentDevice] systemVersion]]);
-  } else {
-    result(FlutterMethodNotImplemented);
-  }
+    if ([@"getPlatformVersion" isEqualToString:call.method]) {
+        result([@"iOS " stringByAppendingString:[[UIDevice currentDevice] systemVersion]]);
+    } else if ([@"getThumbnail" isEqualToString:call.method]) {
+        result([self imageFromVideoURL:call.arguments[@"videoFilePath"]]);
+    } else {
+        result(FlutterMethodNotImplemented);
+    }
 }
 
-@end
+- (NSString *)imageFromVideoURL:(NSString *)contentPath {
+    NSURL *videoURL = [NSURL fileURLWithPath:contentPath];
+
+    AVAsset *asset = [AVAsset assetWithURL:videoURL];
+
+    //  Get thumbnail at the very start of the video
+    CMTime thumbnailTime = CMTimeMake(60, 60);
+    //    thumbnailTime.value = 0.2;
+
+    //  Get image from the video at the given time
+    AVAssetImageGenerator *imageGenerator = [[AVAssetImageGenerator alloc] initWithAsset:asset];
+    imageGenerator.appliesPreferredTrackTransform = YES;
+    imageGenerator.maximumSize = CGSizeMake(1024, 768);
+
+    CGImageRef imageRef = [imageGenerator copyCGImageAtTime:thumbnailTime actualTime:NULL error:NULL];
+    UIImage *thumbnail = [UIImage imageWithCGImage:imageRef];
+    if (thumbnail != nil){
+        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
+                                                             NSUserDomainMask, YES);
+        NSString *documentsDirectory = [paths objectAtIndex:0];
+        NSString* pathTemp = [documentsDirectory stringByAppendingPathComponent:videoURL.lastPathComponent.stringByDeletingPathExtension];
+        NSString* path = [pathTemp stringByAppendingString:@"_thumb.jpeg" ];
+        NSData* data = UIImageJPEGRepresentation(thumbnail, 1);
+        [data writeToFile:path atomically:NO];
+
+        return path;
+    } else {
+        return @"No file created";
+    }
+}
+@end