cog/Spotlight/NSComparisonPredicate+CogPredicate.m

//
//  NSComparisonPredicate+CogPredicate.m
//  Cog
//
//  Created by Matthew Grinshpun on 14/02/08.
//  Copyright 2008 __MyCompanyName__. All rights reserved.
//

#import "NSComparisonPredicate+CogPredicate.h"

// Ignore case and diacritics
static const unsigned OPTIONS = (NSCaseInsensitivePredicateOption |
                                 NSDiacriticInsensitivePredicateOption);

@implementation NSComparisonPredicate (CogPredicate)

+ (NSPredicate *)predicateForMdKey:(NSString *)key
                        withString:(NSString *)aString
                       exactString:(BOOL)exactString {
	// We don't want an exact string, so wrap it in wildcards
	if(!exactString)
		aString = [NSString stringWithFormat:@"*%@*", aString];

	return [NSComparisonPredicate
	predicateWithLeftExpression:[NSExpression expressionForKeyPath:key]
	            rightExpression:[NSExpression expressionForConstantValue:aString]
	                   modifier:NSDirectPredicateModifier
	                       type:NSLikePredicateOperatorType
	                    options:OPTIONS];
}

@end