Synnefo » Pithos MacOS Client

//

//  BytesSizeTransformer.m

//  pithos-macos

//

// Copyright 2011 GRNET S.A. All rights reserved.

//

// Redistribution and use in source and binary forms, with or

// without modification, are permitted provided that the following

// conditions are met:

// 

//   1. Redistributions of source code must retain the above

//      copyright notice, this list of conditions and the following

//      disclaimer.

// 

//   2. Redistributions in binary form must reproduce the above

//      copyright notice, this list of conditions and the following

//      disclaimer in the documentation and/or other materials

//      provided with the distribution.

// 

// THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

// POSSIBILITY OF SUCH DAMAGE.

// 

// The views and conclusions contained in the software and

// documentation are those of the authors and should not be

// interpreted as representing official policies, either expressed

// or implied, of GRNET S.A.

#import "BytesSizeTransformer.h"

@implementation BytesSizeTransformer

+ (Class)transformedValueClass {

	return [NSString class];

}

+ (BOOL)allowsReverseTransformation {

	return NO;

}

- (id)transformedValue:(id)value {

    if (value == nil)

		return nil;

    double bytes = [value unsignedIntegerValue] + 0.0;

    if (bytes <= 999) {

        return [NSString stringWithFormat:@"%d B", (int)bytes];

    } else if (bytes <= 999000) {

        return [NSString stringWithFormat:@"%d KB", (int)ceil(bytes / 1000)];

    } else if (bytes <= 999900000) {

        double megabytes = floor(bytes / 1000000);

        double hundredkilobytes = ceil((bytes - megabytes * 1000000) / 100000);

        if (hundredkilobytes == 10) {

            megabytes++;

            hundredkilobytes = 0;

        }

        if (hundredkilobytes == 0) {

            return [NSString stringWithFormat:@"%d MB", (int)megabytes];

        } else {

            return [NSString stringWithFormat:@"%d.%d MB", (int)megabytes, (int)hundredkilobytes];

        }

    } else {

        double gigabytes = floor(bytes / 1000000000);

        double hundredmegabytes = ceil((bytes - gigabytes * 1000000000) / 100000000);

        if (hundredmegabytes == 10) {

            gigabytes++;

            hundredmegabytes = 0;

        }

        if (hundredmegabytes == 0) {

            return [NSString stringWithFormat:@"%d GB", (int)gigabytes];

        } else {

            return [NSString stringWithFormat:@"%d.%d GB", (int)gigabytes, (int)hundredmegabytes];

        }

    }

}

+ (void)initialize {

    [[self class] setValueTransformer:[self new] forName:@"BytesSizeTransformer"];

}

@end