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#import "TextParsingHelper.h"
NS_ASSUME_NONNULL_BEGIN
@implementation TextParsingHelper
+ (NSMutableDictionary *)parseText:(NSString *)text {
if (!text || [text length] == 0) {
return nil;
}
NSArray *lines = [text componentsSeparatedByString:@"\n"];
if ([lines count] == 0) {
return nil;
}
NSMutableDictionary *result = [[NSMutableDictionary alloc] init];
NSMutableString *notes = nil;
BOOL processingNotes = NO;
for (NSInteger i = 0; i < [lines count]; i++) {
NSString *line = [lines objectAtIndex:i];
// The first line is always interpreted as the title. No matter what. Notes start with >>
if (i == 0) {
NSRange rangeOfSeparator = [line rangeOfString:@">>"];
if (rangeOfSeparator.location != NSNotFound) {
NSString *title = [line substringToIndex:rangeOfSeparator.location];
NSString *notesPart = [line substringFromIndex:rangeOfSeparator.location + 2];
if ([title length] > 0) {
[result setObject:title forKey:@"title"];
}
if ([notesPart length] > 0) {
notes = [[NSMutableString alloc] initWithString:notesPart];
processingNotes = YES;
}
} else {
if ([line length] > 0) {
[result setObject:line forKey:@"title"];
}
}
} else {
if ([line length] > 0) {
unichar firstChar = [line characterAtIndex:0];
// Once we encounter a special line, we stop parsing notes.
if (firstChar == '#' || firstChar == '@' || firstChar == '!') {
processingNotes = NO;
NSString *content = nil;
if ([line length] > 1) {
content = [line substringFromIndex:1];
}
if (content && [content length] > 0) {
switch (firstChar) {
case '#':
if (![result objectForKey:@"tags"]) {
[result setObject:content forKey:@"tags"];
}
break;
case '@':
if (![result objectForKey:@"when"]) {
[result setObject:content forKey:@"when"];
}
break;
case '!':
if (![result objectForKey:@"deadline"]) {
[result setObject:content forKey:@"deadline"];
}
break;
}
}
} else if (processingNotes) {
if (notes) {
[notes appendString:@"\n"];
[notes appendString:line];
} else {
notes = [[NSMutableString alloc] initWithString:line];
}
}
} else if (processingNotes) {
// This is an empty notes line
if (notes) {
[notes appendString:@"\n"];
}
}
}
}
if (notes && [notes length] > 0) {
[result setObject:[NSString stringWithString:notes] forKey:@"notes"];
}
if (notes) {
[notes release];
}
if ([result count] == 0) {
[result release];
return nil;
}
return [result autorelease];
}
@end
NS_ASSUME_NONNULL_END
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