5_CustomTableViewCell/CustomTableViewCell/APLRegion.m

 
/*
     File: APLRegion.m
 Abstract: Object to represent a region containing the corresponding time zone wrappers.
 
  Version: 3.0
 
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 */
 
#import "APLRegion.h"
#import "APLTimeZoneWrapper.h"
 
 
static NSMutableDictionary *regions;
 
@interface APLRegion ()
@property (nonatomic) NSMutableArray *mutableTimeZoneWrappers;
@end
 
 
@implementation APLRegion
 
/*
 Class methods to manage global regions (pun intended).
 */
+ (void)initialize {
    regions = [[NSMutableDictionary alloc] init];   
}
 
 
+ (instancetype)regionNamed:(NSString *)name {
    return regions[name];
}
 
 
+ (instancetype)newRegionWithName:(NSString *)regionName {
    // Create a new region with a given name; add it to the regions dictionary.
    APLRegion *newRegion = [[self alloc] init];
    newRegion.name = regionName;
    newRegion.mutableTimeZoneWrappers = [[NSMutableArray alloc] init];
    regions[regionName] = newRegion;
    return newRegion;
}
 
 
-(NSArray *)timeZoneWrappers {
    return _mutableTimeZoneWrappers;
}
 
 
- (void)addTimeZone:(NSTimeZone *)timeZone nameComponents:(NSArray *)nameComponents {
    // Add a time zone to the region; use nameComponents because it' expensive to compute.
    APLTimeZoneWrapper *timeZoneWrapper = [[APLTimeZoneWrapper alloc] initWithTimeZone:timeZone nameComponents:nameComponents];
    timeZoneWrapper.calendar = self.calendar;
    [self.mutableTimeZoneWrappers addObject:timeZoneWrapper];
}
 
 
- (void)sortZones {
    // Sort the zone wrappers by locale name.
    NSSortDescriptor *nameSortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"localeName" ascending:YES comparator:^(id name1, id name2) {
        return [(NSString *)name1 localizedStandardCompare:(NSString *)name2];
    }];
    
    [self.mutableTimeZoneWrappers sortUsingDescriptors:@[nameSortDescriptor]];
}
 
 
// Sets the date for the time zones, which has the side-effect of "faulting" the wrappers (see APLTimeZoneWrapper's setDate: method)
- (void)setDate:(NSDate *)date {
    for (APLTimeZoneWrapper *wrapper in self.timeZoneWrappers) {
        wrapper.date = date;
    }
}
 
 
@end