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/*
Copyright (c) 2008, 2ndSite Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the <ORGANIZATION> nor the names of its
contributors may be used to endorse or promote products derived from this
software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#import "Timer.h"


@implementation Timer
@synthesize delegate;
@synthesize running;
@synthesize seconds_elapsed;
@synthesize start_date;

-(id) init {
self = [super init];
running = FALSE;
seconds_elapsed = 0;
return self;
}

-(void) start {
[self startAt:[NSDate date]];
}

-(void) startAt:(NSDate *)s_date {
self.start_date = s_date;
update_interval = [[NSTimer timerWithTimeInterval:(NSTimeInterval)0.5 target:self selector:NSSelectorFromString(@"handleUpdateInterval:") userInfo:nil repeats:YES] retain];
[[NSRunLoop mainRunLoop] addTimer:update_interval forMode:NSDefaultRunLoopMode];
running = TRUE;
[delegate timerDidUpdate:self];
}

-(void) stop {
seconds_elapsed += [self currentElapsedSeconds];

self.start_date = nil;

[update_interval invalidate];
[update_interval release];
update_interval = nil;

[delegate timerDidUpdate:self];
running = FALSE;
}

-(NSInteger) currentElapsedSeconds {
if(start_date != nil){
return [[NSNumber numberWithDouble:[start_date timeIntervalSinceNow]] integerValue] * -1;
} else {
return 0;
}
}

-(void) handleUpdateInterval:(NSTimer *)update_interval {
[delegate timerDidUpdate:self];
}

-(NSInteger) hours {
return (seconds_elapsed + [self currentElapsedSeconds]) / 3600;
}

-(NSInteger) minutes {
return ((seconds_elapsed + [self currentElapsedSeconds]) / 60) % 60;
}

-(NSInteger) seconds {
return (seconds_elapsed + [self currentElapsedSeconds]) % 60;
}

-(void) setHours:(NSInteger)new_hours{
seconds_elapsed = seconds_elapsed - ([self hours] * 3600) + (new_hours * 3600);
[delegate timerDidUpdate:self];
}

-(void) setMinutes:(NSInteger)new_minutes{
seconds_elapsed = seconds_elapsed - ([self minutes] * 60) + (new_minutes * 60);
[delegate timerDidUpdate:self];
}

-(void) setSeconds:(NSInteger)new_seconds{
seconds_elapsed = seconds_elapsed - [self seconds] + new_seconds;
[delegate timerDidUpdate:self];
}

-(void) setByTimeInterval:(NSTimeInterval)interval {
self.seconds_elapsed = [[NSNumber numberWithDouble:interval] integerValue];
[delegate timerDidUpdate:self];
}

-(NSString *) stringHours{
return [NSString stringWithFormat:@"%i",[self hours]];
}

-(NSString *) stringMinutes{
return [self paddedIntString:[self minutes] toLength:2];
}

-(NSString *) stringSeconds{
return [self paddedIntString:[self seconds] toLength:2];
}

-(NSString *) paddedIntString:(NSInteger)value toLength:(NSInteger)length {
NSString *output;
output = [NSString stringWithFormat:@"%i", value];
while([output length] < length){
output = [@"0" stringByAppendingString:output];
}

return output;
}

@end
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