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/*
* Copyright 2008 Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
#import "KerberosFormatters.h"
#define EXPIRED_STRING @"Expired"
@implementation KerberosTimeFormatter
/*
* For display of Kerberos expiration times.
* Converts an NSDate into an NSString like "09:53" for 9 hours and 53 minutes
* in the future. Returns @"Expired" if expiration date is before now.
*/
- (NSString *)stringForObjectValue:(id)anObject
{
NSString *result = nil;
if (anObject == nil || ![anObject respondsToSelector:@selector(timeIntervalSince1970)]) {
result = [NSString stringWithFormat:@"%s given invalid object %@",
_cmd, NSStringFromClass([anObject class])];
}
else {
time_t lifetime = [(NSDate *)anObject timeIntervalSince1970] - time(NULL);
if (lifetime > 0) {
time_t seconds = (lifetime % 60);
time_t minutes = (lifetime / 60 % 60);
time_t hours = (lifetime / 3600 % 24);
time_t days = (lifetime / 86400);
if (seconds > 0) { seconds = 0; minutes++; }
if (minutes > 59) { minutes = 0; hours++; }
if (hours > 23) { hours = 0; days++; }
result = [NSString stringWithFormat:@"%02ld:%02ld", hours, minutes];
} else {
result = EXPIRED_STRING;
}
}
return result;
}
/*
* Converts NSStrings like @"09:53" into NSDate representation of that point
* in the future. If string is @"Expired", NSDate is set to 1970.
*/
- (BOOL)getObjectValue:(id *)anObject
forString:(NSString *)string
errorDescription:(NSString **)error
{
NSArray *tokens = [string componentsSeparatedByString:@":"];
*anObject = nil;
if ([tokens count] == 2) {
NSInteger hours = [[tokens objectAtIndex:0] longValue];
NSInteger minutes = [[tokens objectAtIndex:1] longValue];
*anObject = [NSDate dateWithTimeIntervalSince1970:(hours * 60 * 60) + (minutes * 60)];
} else if ([string isEqualToString:EXPIRED_STRING]) {
*anObject = [NSDate dateWithTimeIntervalSince1970:0];
}
if (*anObject == nil) {
return false;
}
return true;
}
- (NSAttributedString *)attributedStringForObjectValue:(id)anObject
withDefaultAttributes:(NSDictionary *)attributes
{
NSAttributedString *resultString = nil;
NSString *plainString = [self stringForObjectValue:anObject];
NSMutableDictionary *newAttributes = [attributes mutableCopy];
if ([plainString isEqualToString:EXPIRED_STRING]) {
[newAttributes setObject:[NSColor redColor]
forKey:NSForegroundColorAttributeName];
[newAttributes setObject: [NSNumber numberWithFloat: 0.3]
forKey: NSObliquenessAttributeName];
}
resultString = [[NSAttributedString alloc] initWithString:plainString attributes:newAttributes];
[newAttributes release];
return [resultString autorelease];
}
@end
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