gistfile1.m

#import "SFFlow.h"

@implementation SFFlow

// Custom logic goes here.

#pragma mark common managed object methods
+ (id *)upsert:(NSDictionary *)data
{
	NSEntityDescription *entityDescription = [[self class] entityInManagedObjectContext:[[self class] _moc]];
	NSFetchRequest *request = [[[NSFetchRequest alloc] init] autorelease];
	[request setEntity:entityDescription];
	NSPredicate *predicate = [NSPredicate predicateWithFormat:@"id = %@", [data objectForKey:@"id"]];
	NSError *error;
	[request setPredicate:predicate];
	NSArray *array = [[[self class] _moc] executeFetchRequest:request error:&error];
	if ([array count] == 1) {
		id *instance = [array objectAtIndex:0];
		[instance populateFromDictionary:data];
	} else {
		id *instance = [[self class] insertInManagedObjectContext:[[self class] _moc]];
		[instance populateFromDictionary:data];
	}
	if (![[[self class] _moc] save:&error]){
		// handle error
	};
}

- (id *)populateFromDictionary:(NSDictionary *)data{
	for (id key in data) {
		NSString* methodName = [NSString stringWithFormat:@"set%@:", [key stringByCapitalizingFirstCharacter]];
		if ([self respondsToSelector:NSSelectorFromString(methodName)]) {
			if ([key isEqualToString:@"updated_at"] || [key isEqualToString:@"created_at"]) {
				NSDate *date = [NSDate dateWithString:[data objectForKey:key]];
				[self performSelector:NSSelectorFromString(methodName) withObject:date];
			} else {
				[self performSelector:NSSelectorFromString(methodName) withObject:[data objectForKey:key]];
			}
		}
	}
}

+ (NSManagedObjectContext *)_moc
{
	return [[[UIApplication sharedApplication] delegate] managedObjectContext];
}

@end