root / pithos-macos / SharingDictionaryTransformer.m @ cb6abe72
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// SharingDictionaryTransformer.m |
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// pithos-macos |
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// |
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// Copyright 2011 GRNET S.A. All rights reserved. |
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// |
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// Redistribution and use in source and binary forms, with or |
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// without modification, are permitted provided that the following |
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// conditions are met: |
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// |
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// 1. Redistributions of source code must retain the above |
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// copyright notice, this list of conditions and the following |
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// disclaimer. |
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// |
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// 2. Redistributions in binary form must reproduce the above |
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// copyright notice, this list of conditions and the following |
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// disclaimer in the documentation and/or other materials |
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// provided with the distribution. |
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// |
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// THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS |
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// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR |
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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// POSSIBILITY OF SUCH DAMAGE. |
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// |
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// The views and conclusions contained in the software and |
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// documentation are those of the authors and should not be |
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// interpreted as representing official policies, either expressed |
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// or implied, of GRNET S.A. |
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#import "SharingDictionaryTransformer.h" |
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@implementation SharingDictionaryTransformer |
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+ (Class)transformedValueClass { |
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return [NSMutableDictionary class]; |
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} |
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|
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+ (BOOL)allowsReverseTransformation { |
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return YES; |
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} |
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|
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- (id)transformedValue:(id)value { |
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NSMutableDictionary *sharingDictionary = [NSMutableDictionary dictionary]; |
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|
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if (value == nil) |
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return sharingDictionary; |
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NSRange readRange = [(NSString *)value rangeOfString:@"read=" options:NSCaseInsensitiveSearch]; |
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NSUInteger readStart = readRange.location + readRange.length; |
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NSRange writeRange = [(NSString *)value rangeOfString:@"write=" options:NSCaseInsensitiveSearch]; |
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NSUInteger writeStart = writeRange.location + writeRange.length; |
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if (writeRange.length == 0) { |
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if (readRange.length == 0) { |
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return sharingDictionary; |
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} |
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for (NSString *readUser in [[(NSString *)value substringFromIndex:readStart] componentsSeparatedByString:@","]) { |
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[sharingDictionary setValue:@"read only" forKey:readUser]; |
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} |
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} else if (readRange.length == 0) { |
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for (NSString *writeUser in [[(NSString *)value substringFromIndex:writeStart] componentsSeparatedByString:@","]) { |
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[sharingDictionary setValue:@"read/write" forKey:writeUser]; |
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} |
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} else if (readRange.location < writeRange.location) { |
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NSRange semicolonRange = [(NSString *)value rangeOfString:@";"]; |
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for (NSString *readUser in [[(NSString *)value substringWithRange:NSMakeRange(readStart, semicolonRange.location - readStart)] componentsSeparatedByString:@","]) { |
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[sharingDictionary setValue:@"read only" forKey:readUser]; |
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} |
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for (NSString *writeUser in [[(NSString *)value substringFromIndex:writeStart] componentsSeparatedByString:@","]) { |
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[sharingDictionary setValue:@"read/write" forKey:writeUser]; |
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} |
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} else { |
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NSRange semicolonRange = [(NSString *)value rangeOfString:@";"]; |
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for (NSString *readUser in [[(NSString *)value substringFromIndex:readStart] componentsSeparatedByString:@","]) { |
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[sharingDictionary setValue:@"read only" forKey:readUser]; |
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} |
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for (NSString *writeUser in [[(NSString *)value substringWithRange:NSMakeRange(writeStart, semicolonRange.location - writeStart)] componentsSeparatedByString:@","]) { |
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[sharingDictionary setValue:@"read/write" forKey:writeUser]; |
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} |
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} |
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|
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return sharingDictionary; |
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} |
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- (id)reverseTransformedValue:(id)value { |
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if ((value == nil) || ([(NSMutableDictionary *)value count] == 0)) |
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return nil; |
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|
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NSString *readSharingString = nil; |
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NSArray *readUsers = [(NSMutableDictionary *)value allKeysForObject:@"read only"]; |
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if ([readUsers count]) |
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readSharingString = [NSString stringWithFormat:@"read=%@", [readUsers componentsJoinedByString:@","]]; |
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NSString *writeSharingString = nil; |
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|
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NSArray *writeUsers = [(NSMutableDictionary *)value allKeysForObject:@"read/write"]; |
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if ([writeUsers count]) |
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writeSharingString = [NSString stringWithFormat:@"write=%@", [writeUsers componentsJoinedByString:@","]]; |
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|
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if (readSharingString) { |
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if (writeSharingString) { |
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return [NSString stringWithFormat:@"%@;%@", readSharingString, writeSharingString]; |
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} |
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return readSharingString; |
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} else { |
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return writeSharingString; |
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} |
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} |
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|
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+ (void)initialize { |
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[[self class] setValueTransformer:[self new] forName:@"SharingDictionaryTransformer"]; |
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} |
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@end |