//
//  NGAStringAdditions.m
//  P4ObjectLayer
//
//  Created by Michael Bishop on 8/3/10.
//  Copyright 2010 Numerical Garden, LLC. All rights reserved.
//

#import "NSString+NGAAdditions.h"


@implementation NSString (NGAAdditions)

-(NSString*)NGA_stringByConvertingFirstWordToLowerCase
{
    NSScanner * scanner = [NSScanner scannerWithString:self];
    
    NSString * upperCasePrefix = nil;
    
    BOOL success = [scanner scanCharactersFromSet:[NSCharacterSet uppercaseLetterCharacterSet]
                                       intoString:&upperCasePrefix];
    
    NSString * result = self;
    
    // There were no uppercase characters
    if ( success )
        result = [self stringByReplacingCharactersInRange:NSMakeRange(0, [upperCasePrefix length])
                                               withString:[upperCasePrefix lowercaseString]];
    return result;
}


-(NSString*)NGA_stringByConvertingFirstCharacterToUpperCase
{
    NSString * firstCharacter = [[self substringToIndex:1] uppercaseString];
    
    return [firstCharacter stringByAppendingString:[self substringFromIndex:1]];
}

-(NSString*)NGA_stringByAddingKeyPath:(NSString*)keyPath
{
    if ( !keyPath )
        return [[self autorelease] retain];
    return [self stringByAppendingFormat:@".%@", keyPath];
}


-(NSString*)NGA_stringBySubstitutingVariables:(NSDictionary*)variables prefix:(NSString*)prefix
{
    NSMutableString * string = [[self mutableCopy] autorelease];
    for (NSString * key in [variables allKeys]) {
        [string replaceOccurrencesOfString:[prefix stringByAppendingString:key] withString:[variables objectForKey:key] options:NSCaseInsensitiveSearch range:NSMakeRange(0, string.length)];
    }
    
    return [string stringByReplacingOccurrencesOfString:[prefix stringByAppendingString:prefix] withString:prefix];
}

@end