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NSString+minifyJSONString.m
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NSString+minifyJSONString.m
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//
// NSString+minifyJSONString.m
// jsonminifier
//
// Created by Bödecs Tibor on 7/19/13.
// Copyright (c) 2013 Bödecs Tibor. All rights reserved.
//
#import "NSString+minifyJSONString.h"
@implementation NSString (minifyJSONString)
- (NSString *)minifyJSONString
{
BOOL in_string = NO;
BOOL in_multiline_comment = NO;
BOOL in_singleline_comment = NO;
NSString *tmp;
NSString *tmp2;
NSMutableArray *new_str = [@[] mutableCopy];
int from = 0;
NSString *lc;
NSString *rc;
int lastIndex = 0;
NSRegularExpression *tokenizer = [NSRegularExpression regularExpressionWithPattern:@"\"|(\\/\\*)|(\\*\\/)|(\\/\\/)|\n|\r"
options:NSRegularExpressionCaseInsensitive
error:nil];
NSRegularExpression *magic = [NSRegularExpression regularExpressionWithPattern:@"(\\\\)*$"
options:NSRegularExpressionCaseInsensitive
error:nil];
NSArray *matches = [tokenizer matchesInString:self
options:0
range:NSMakeRange(0, self.length)];
if ([matches count] == 0) {
return self;
}
for (NSTextCheckingResult *match in matches) {
NSRange range = [match range];
tmp = [self substringWithRange:range];
lastIndex = (int)range.location + (int)range.length;
lc = [self substringWithRange:NSMakeRange(0, lastIndex - (int)range.length)];
rc = [self substringWithRange:NSMakeRange(lastIndex, self.length - lastIndex)];
if ( !in_multiline_comment && !in_singleline_comment ) {
tmp2 = [lc substringWithRange:NSMakeRange(from, lc.length - from)];
if ( !in_string ) {
NSArray* words = [tmp2 componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
tmp2 = [words componentsJoinedByString:@""];
}
[new_str addObject:tmp2];
}
from = lastIndex;
if ( [tmp hasPrefix:@"\""] && !in_multiline_comment && !in_singleline_comment) {
NSArray *_matches = [magic matchesInString:lc
options:0
range:NSMakeRange(0, lc.length)];
if (_matches.count > 0 ) {
NSTextCheckingResult *_match = _matches[0];
NSRange _range = [_match range];
if ( !in_string || _range.length%2 == 0 ) {
in_string = !in_string;
}
}
from--;
rc = [self substringWithRange:NSMakeRange(from, self.length - from)];
}
else if ( [tmp hasPrefix:@"/*"] && !in_string && !in_multiline_comment && !in_singleline_comment ) {
in_multiline_comment = YES;
}
else if ( [tmp hasPrefix:@"*/"] && !in_string && in_multiline_comment && !in_singleline_comment ) {
in_multiline_comment = NO;
}
else if ( [tmp hasPrefix:@"//"] && !in_string && !in_multiline_comment && !in_singleline_comment) {
in_singleline_comment = YES;
}
else if ( ([tmp hasPrefix:@"\n"] || [tmp hasPrefix:@"\r"]) && !in_string && !in_multiline_comment && in_singleline_comment) {
in_singleline_comment = NO;
}
else if (!in_multiline_comment && !in_singleline_comment ) {
NSArray* words = [tmp componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]];
tmp = [words componentsJoinedByString:@""];
if (tmp && tmp.length) {
[new_str addObject:tmp];
}
}
}
[new_str addObject:rc];
return [new_str componentsJoinedByString:@""];
}
@end