NSDictionary+BSJSONAdditions.m

//
//  BSJSONAdditions
//
//  Created by Blake Seely on 2/1/06.
//  Copyright 2006 Blake Seely - http://www.blakeseely.com  All rights reserved.
//  Permission to use this code:
//
//  Feel free to use this code in your software, either as-is or 
//  in a modified form. Either way, please include a credit in 
//  your software's "About" box or similar, mentioning at least 
//  my name (Blake Seely).
//
//  Permission to redistribute this code:
//
//  You can redistribute this code, as long as you keep these 
//  comments. You can also redistribute modified versions of the 
//  code, as long as you add comments to say that you've made 
//  modifications (keeping these original comments too).
//
//  If you do use or redistribute this code, an email would be 
//  appreciated, just to let me know that people are finding my 
//  code useful. You can reach me at blakeseely@mac.com

#import "NSDictionary+BSJSONAdditions.h"
#import "NSScanner+BSJSONAdditions.h"
#import "NSString+BSJSONAdditions.h"
#import "BSJSONEncoder.h"

@implementation NSDictionary (BSJSONAdditions)

+ (NSDictionary *)dictionaryWithJSONString:(NSString *)jsonString
{
	NSScanner *scanner = [[NSScanner alloc] initWithString:jsonString];
	NSDictionary *dictionary = nil;
	[scanner scanJSONObject:&dictionary];
	[scanner release];
	return dictionary;
}

- (NSString *)jsonStringValue
{
    return [self jsonStringValueWithIndentLevel:0];
}

- (NSString *)jsonStringValueWithIndentLevel:(NSInteger)level
{
	NSMutableString *jsonString = [[NSMutableString alloc] initWithString:jsonObjectStartString];
	
	BOOL first = YES;
	
  	NSEnumerator *enumerator = [self keyEnumerator];
	NSString *keyString = nil;
	while ((keyString = [enumerator nextObject])) {
		NSString *valueString = [BSJSONEncoder jsonStringForValue:[self objectForKey:keyString] withIndentLevel:level];
		if (!first) {
			[jsonString appendString:jsonValueSeparatorString];
		}
		if (level != jsonDoNotIndent) { // indent before each key
			[jsonString appendString:[NSString jsonIndentStringForLevel:level]];
		}
		[jsonString appendFormat:@" %@ %@ %@", [keyString jsonStringValue], jsonKeyValueSeparatorString, valueString];
		first = NO;
	}
	
	[jsonString appendString:jsonObjectEndString];
	return [jsonString autorelease];
}

@end