gistfile1.m

//
//  SNFirebase.m
//  SharedNotes
//
//  Created by Zane Claes on 4/12/14.
//  Copyright (c) 2014 inZania LLC. All rights reserved.
//

#import "SNFirebase.h"
#import <Firebase/Firebase.h>

@implementation NSDictionary (DeepCopy)

- (NSMutableDictionary *)mutableDeepCopy
{
  return (NSMutableDictionary *)CFBridgingRelease(CFPropertyListCreateDeepCopy(kCFAllocatorDefault, (CFDictionaryRef)self, kCFPropertyListMutableContainers));
}

@end

@interface SNFirebase ()
@property (nonatomic, strong) NSString *firebaseURL;
@end

@implementation SNFirebase

- (void)save:(void (^)(BOOL success))completionHandler {
  // Use a copied firebase, so that we don't create race conditions
  // Firebase uses a different thread, and will throw mutation exceptions
  Firebase *fb = [[Firebase alloc] initWithUrl:self.firebaseURL];
  [fb setValue:[self.contents copy]  withCompletionBlock:^(NSError *error, Firebase *ref) {
    if(completionHandler) {
      completionHandler(error ? NO : YES);
    }
  }];
}

- (void)save {
  [self save:nil];
}

- (void)load:(void (^)(BOOL success))block {
  Firebase *fb = [[Firebase alloc] initWithUrl:self.firebaseURL];
  [fb observeSingleEventOfType:FEventTypeValue withBlock:^(FDataSnapshot *snapshot) {
    _contents = [[snapshot.value isKindOfClass:[NSDictionary class]]?snapshot.value:@{} mutableDeepCopy];
    block(_contents.allKeys.count > 0);
  }];
}

- (Firebase*)firebase {
  return [[Firebase alloc] initWithUrl:self.firebaseURL];
}

- (id)initWithFirebase:(Firebase*)firebase contents:(NSDictionary*)contents {
  if((self = [super init])) {
    _firebaseURL = firebase.description;
    _contents = [contents?:@{} mutableDeepCopy];
  }
  return self;
}

@end