//
//  ImageToDataTransformer.m
//  ProfitTrain
//
//  Created by Michael Zornek on 10/4/11.
//  Copyright (c) 2011 Clickable Bliss. All rights reserved.
//

#import "ImageToDataTransformer.h"

@implementation ImageToDataTransformer

+ (BOOL)allowsReverseTransformation
{
    return YES;
}

+ (Class)transformedValueClass
{
    return [NSData class];
}

- (id)transformedValue:(id)value
{
    // IMP1
    //NSData *bitmapData = [NSBitmapImageRep representationOfImageRepsInArray:[value representations] usingType:NSPNGFileType properties:nil];
    //return bitmapData;
    // ERROR:
    // ImageIO: <ERROR>  CGImageDestinationFinalize image destination does not have enough images
    // 2011-10-05 11:53:40.694 ProfitTrain[35424:507] CGImageDestinationFinalize failed for output type 'public.png'

    // IMP2
    //NSBitmapImageRep *rep = [[value representations] objectAtIndex:0];
    //NSData *data = [rep representationUsingType:NSPNGFileType properties:nil];
	//return data;
    // ERROR: rep is not a NSBitmapImageRep it's a NSCoreUIImageRep, unrecognized selector sent to instance 0x10066cd30

    // IMP3
    //NSImage *image = (NSImage *)value;
    //return [NSKeyedArchiver archivedDataWithRootObject:image];
    // IMP3 works when working with NSImages built from files or NamedImages but failes with images returned from IKPictureTaker. When decoding these images we get:
    // 2011-10-05 12:11:42.246 ProfitTrain[35896:507] Warning - attempting to decode NSCGSImageRep
    // 2011-10-05 12:12:04.586 ProfitTrain[35896:507] *** -[__NSArrayI objectAtIndex:]: index 0 beyond bounds for empty array

    // IMP4 -- can't work since UIImagePNGRepresentation isn't available on Mac
    //NSImage *image = (NSImage *)value;
    //NSData *data = UIImagePNGRepresentation(image);
	//return data;

    // IMP5 - works but when I make a TIFFRepresentation from an NSImage I made with [NSImage imageNamed:NSImageNameUser] it looks like ass.
    NSImage *image = (NSImage *)value;
    return [image TIFFRepresentationUsingCompression:NSTIFFCompressionNone factor:0.0];
}

- (id)reverseTransformedValue:(id)value
{
    NSImage *image = [[NSImage alloc] initWithData:value];
    return image;

    // IMP3 ONLY
    //return [NSKeyedUnarchiver unarchiveObjectWithData:value];
}

@end