cog/Utils/NSDictionary+Merge.m

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#import "NSDictionary+Merge.h"
@implementation NSDictionary (Merge)
+ (NSDictionary *)dictionaryByMerging:(NSDictionary *)dict1 with:(NSDictionary *)dict2 {
NSMutableDictionary *result = [dict1 mutableCopy];
[dict2 enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
if(![dict1 objectForKey:key]) {
[result setObject:obj forKey:key];
} else if([obj isKindOfClass:[NSDictionary class]]) {
NSDictionary *newVal = [[dict1 objectForKey:key] dictionaryByMergingWith:(NSDictionary *)obj];
[result setObject:newVal forKey:key];
} else {
BOOL isEmpty = NO;
id objTarget = [dict1 objectForKey:key];
if([objTarget isKindOfClass:[NSString class]]) {
NSString *val = (NSString *)objTarget;
isEmpty = [val length] == 0;
} else if([objTarget isKindOfClass:[NSNumber class]]) {
NSNumber *val = (NSNumber *)objTarget;
isEmpty = [val isEqualTo:@(0)];
} else if([objTarget isKindOfClass:[NSData class]]) {
NSData *val = (NSData *)objTarget;
isEmpty = [val length] == 0;
}
if(isEmpty) {
[result setObject:obj forKey:key];
}
}
}];
return (NSDictionary *)[NSDictionary dictionaryWithDictionary:result];
}
- (NSDictionary *)dictionaryByMergingWith:(NSDictionary *)dict {
return [[self class] dictionaryByMerging:self with:dict];
}
@end