adding json helpers, start file renaming

CoreData+MagicalRecord.h

@@ -20,4 +20,6 @@
 #import "NSManagedObjectContext+ActiveRecord.h"
 #import "NSPersistentStoreCoordinator+ActiveRecord.h"
 #import "NSManagedObjectModel+ActiveRecord.h"
-#import "NSPersistentStore+ActiveRecord.h"
+#import "NSPersistentStore+ActiveRecord.h"
+
+#import "NSManagedObject+JSONHelpers.h"

NSManagedObject+JSONHelpers.h

@@ -0,0 +1,15 @@
+//
+//  NSManagedObject+JSONHelpers.h
+//  Gathering
+//
+//  Created by Saul Mora on 6/28/11.
+//  Copyright 2011 Magical Panda Software LLC. All rights reserved.
+//
+
+#import <CoreData/CoreData.h>
+
+@interface NSManagedObject (NSManagedObject_JSONHelpers)
+
+- (void) setValuesForKeysWithJSONDictionary:(NSDictionary *)jsonData;
+
+@end

NSManagedObject+JSONHelpers.m

@@ -0,0 +1,56 @@
+//
+//  NSManagedObject+JSONHelpers.m
+//  Gathering
+//
+//  Created by Saul Mora on 6/28/11.
+//  Copyright 2011 Magical Panda Software LLC. All rights reserved.
+//
+
+#import "NSManagedObject+JSONHelpers.h"
+
+
+static NSString * const kNSManagedObjectAttributeJSONKeyMapKey = @"jsonKeyName";
+
+@implementation NSString (JSONParsingHelpers)
+
+- (NSDate *) ga_dateFromJSONString;
+{
+    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
+    [formatter setDateFormat:@"YYYY-MM-dd'T'HH:mm:ss'Z'"];
+    
+    return [formatter dateFromString:self];
+}
+
+@end
+
+
+
+@implementation NSManagedObject (NSManagedObject_JSONHelpers)
+
+
+- (void) setValuesForKeysWithJSONDictionary:(NSDictionary *)jsonData
+{
+    NSDictionary *attributes = [[self entity] attributesByName];
+    
+    for (NSString *attributeName in attributes) 
+    {
+        NSAttributeDescription *attributeInfo = [attributes valueForKey:attributeName];
+        
+        NSString *lookupKey = [[attributeInfo userInfo] valueForKey:kNSManagedObjectAttributeJSONKeyMapKey] ?: attributeName;
+        id value = [jsonData valueForKey:lookupKey];
+        
+        if (value == nil || [value isEqual:[NSNull null]])
+        {
+            continue;
+        }
+        
+        NSAttributeType attributeType = [attributeInfo attributeType];
+        if (attributeType == NSDateAttributeType)
+        {
+            value = [value ga_dateFromJSONString];
+        }
+        
+        [self setValue:value forKey:attributeName];
+    }
+}
+@end