PNObject/Pod/Classes/PNObject.m

//
//  PNObject.m
//  Pods
//
//  Created by Giuseppe Nucifora on 28/12/15.
//
//

#import "PNObject.h"
#import <NSDate_Utils/NSDate+NSDate_Util.h>
#import <AFNetworking/AFNetworking.h>
#import "PNObject/PNUser.h"
#import "PNObjectConstants.h"
#import "PNObject+Protected.h"
#import "objc/runtime.h"

#define PNOBJECT_DIR @"PNObjects"


@interface PNObject() <PNObjectPersistency,PNObjectSubclassing>

@property (nonatomic, strong) PNObjectModel * _Nonnull objectModel;

@property (nonatomic, strong) NSMutableDictionary * _Nonnull JSON;

@property (nonatomic, strong) NSString * _Nonnull endPoint;

@property (nonatomic) BOOL singleInstance;

@end

@implementation PNObject

#pragma mark PNObjectSubclassing

+ (NSDictionary *) objcetMapping {
	NSDictionary *mapping = @{@"objID":@"objID",
							  @"createdAt":@"created_at",
							  };
	return mapping;
}

+ (BOOL) singleInstance {
	return NO;
}

+ (NSString*) objectClassName {
	return NSStringFromClass([self class]);
}

#pragma mark -

+ (NSString * _Nonnull) PNObjClassName {
	if ([[self class] resolveClassMethod:@selector(objectClassName)]) {
		return [[self class] objectClassName];
	}
	else {
		return  [[super class] objectClassName];
	}
}

- (_Nullable instancetype) init {
	self = [super init];
	
	if (self) {
		if ([[self class] isSubclassOfClass:[PNObject class]]) {
			
			NSAssert([[self class] conformsToProtocol:@protocol(PNObjectSubclassing)], @"Subclass object must conform to PNObjectSubclassing");
			
			_objID = [[NSProcessInfo processInfo] globallyUniqueString];
			
			_objectModel = [PNObjectModel sharedInstance];
			[_objectModel setPersistencyDelegate:self];
			
			NSMutableDictionary * objectDict = [[NSMutableDictionary alloc] initWithDictionary:[[self class] objcetMapping]];
			[objectDict addEntriesFromDictionary:[PNObject objcetMapping]];
			
			_objectMapping = objectDict;
			
			NSAssert(_objectMapping, @"You must create objectMapping");
			
			_singleInstance = [[self class] singleInstance];
			
			_createdAt = [[NSDate date] toLocalTime];
			
		}
	}
	return self;
}

- (_Nullable instancetype) initWithJSON:( NSDictionary * _Nonnull) JSON {
	self = [super init];
	if (self) {
		if ([[self class] isSubclassOfClass:[PNObject class]]) {
			NSAssert([[self class] conformsToProtocol:@protocol(PNObjectSubclassing)], @"Subclass object must conform to PNObjectSubclassing");
			
			_objID = [[NSProcessInfo processInfo] globallyUniqueString];
			
			_objectModel = [PNObjectModel sharedInstance];
			[_objectModel setPersistencyDelegate:self];
			
			NSMutableDictionary * objectDict = [[NSMutableDictionary alloc] initWithDictionary:[[self class] objcetMapping]];
			[objectDict addEntriesFromDictionary:[PNObject objcetMapping]];
			
			_objectMapping = objectDict;
			
			NSAssert(_objectMapping, @"You must create objectMapping");
			
			_singleInstance = [[self class] singleInstance];
			
			_createdAt = [[NSDate date] toLocalTime];
			
		}
		
		NSAssert(_objectMapping, @"You must create objectMapping");
		_JSON = [[NSMutableDictionary alloc] initWithDictionary:JSON];
		
		[self populateObjectFromJSON:_JSON];
	}
	return self;
}

- (NSDictionary * _Nonnull)reverseMapping
{
	NSMutableDictionary *JSON = [NSMutableDictionary dictionary];
	
	NSString *mappedJSONKey;
	NSString *mappedJSONType;
	
	NSDictionary *properties = [PNObject propertiesForClass:self.class];
	
	for (NSString* propertyName in _objectMapping) {
		id mappingValue = [_objectMapping objectForKey:propertyName];
		
		if([mappingValue isKindOfClass:NSDictionary.class]) {
			mappedJSONKey = [mappingValue valueForKey:@"key"];
			mappedJSONType = [mappingValue valueForKey:@"type"];
		} else {
			mappedJSONKey = mappingValue;
		}
		
		NSString *propertyType = [properties valueForKey:propertyName];
		
		id value = [self valueForKey:propertyName];
		
		NSLog(@"PropertyName PropertyType Value: %@ - %@ - %@",propertyName,propertyType,value);
		
		((void (^)())@{
					   @"c" : ^{
			char val = [value charValue];
			[JSON setValue:@(val) forKey:propertyName];
		},
					   @"d" : ^{
			double val = [value doubleValue];
			[JSON setValue:@(val) forKey:propertyName];
		},
					   @"f" : ^{
			float val = [value floatValue];
			[JSON setValue:@(val) forKey:propertyName];
		},
					   @"i" : ^{
			int val = [value intValue];
			[JSON setValue:@(val) forKey:propertyName];
		},
					   @"l" : ^{
			long val = [value longValue];
			[JSON setValue:@(val) forKey:propertyName];
		},
					   @"s" : ^{
			short val = [value shortValue];
			[JSON setValue:@(val) forKey:propertyName];
		},
					   @"B" : ^{
			BOOL val = [value boolValue];
			[JSON setValue:@(val) forKey:propertyName];
		},
					   
					   @"UIImage" : ^{
			UIImage *image = [UIImage imageWithData:value];
			[JSON setValue:image forKey:propertyName];
		},
					   @"NSURL" : ^{
			NSURL *url = value;
			
			if (![self isObjNull:url]) {
				[JSON setValue:[url absoluteString] forKey:propertyName];
			}
		},
					   @"NSString" : ^{
			NSString *val = [NSString stringWithFormat:@"%@", value];
			if (![self isObjNull:val]) {
				[JSON setValue:val forKey:propertyName];
			}
		},
					   @"NSNumber" : ^{
			NSInteger val = [value integerValue];
			[JSON setValue:@(val) forKey:propertyName];
		},
					   @"NSDate" : ^{
			NSDate *val = [value toLocalTime];
			if (![self isObjNull:val]) {
				[JSON setValue:val forKey:propertyName];
			}
		},
					   @"NSArray" : ^{
			NSMutableArray *arr = [NSMutableArray array];
			for(id PNObject in value) {
				SEL selector = NSSelectorFromString(@"getJSONObject");
				NSInvocation *invocation = [NSInvocation invocationWithMethodSignature: [[PNObject class] instanceMethodSignatureForSelector:selector]];
				[invocation setSelector:selector];
				[invocation setTarget:PNObject];
				[invocation invoke];
				NSDictionary *returnValue;
				[invocation getReturnValue:&returnValue];
				
				[arr addObject:returnValue];
			}
			
			[JSON setValue:arr forKey:propertyName];
		},
					   @"NSMutableArray" : ^{
			NSMutableArray *arr = [NSMutableArray array];
			for(id JSONObject in value) {
				PNObject *val = [[NSClassFromString(mappedJSONType) alloc] initWithJSON:JSONObject];
				[arr addObject:val];
				
				SEL selector = NSSelectorFromString(@"getJSONObject");
				NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[[PNObject class] instanceMethodSignatureForSelector:selector]];
				[invocation setSelector:selector];
				[invocation setTarget:value];
				[invocation invoke];
				NSDictionary *returnValue;
				[invocation getReturnValue:&returnValue];
			}
			
			[JSON setValue:arr forKey:propertyName];
		}
					   }[propertyType] ?: ^{
						   BOOL isPNObjectSubclass = [NSClassFromString(propertyType) isSubclassOfClass:[PNObject class]];
						   if(isPNObjectSubclass) {
							   SEL selector = NSSelectorFromString(@"getJSONObject");
							   NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[[PNObject class] instanceMethodSignatureForSelector:selector]];
							   [invocation setSelector:selector];
							   [invocation setTarget:value];
							   [invocation invoke];
							   NSDictionary *returnValue;
							   [invocation getReturnValue:&returnValue];
							   
							   [JSON setValue:returnValue forKey:propertyName];
						   }
						   else {
							   // do nothing
						   }
					   })();
	}
	
	_JSON = JSON;
	
	return _JSON;
}


- (NSDictionary* _Nonnull) getJSONObject {
	if (!_JSON) {
		return [self reverseMapping];
	}
	else {
		return _JSON;
	}
}

- (NSString* _Nonnull) description {
	if (!_JSON) {
		[self reverseMapping];
	}
	return [_JSON description];
}

- (void) setSingleInstance:(BOOL)singleInstance {
	_singleInstance = singleInstance;
}

#pragma mark PNObjectPersistency protocol

- (BOOL) initObjectPersistency {
	
	BOOL isDir=YES;
	NSError *error;
	
	NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
	
	NSFileManager *fileManager= [NSFileManager defaultManager];
	
	if(![fileManager fileExistsAtPath:[docDir stringByAppendingFormat:@"/%@",PNOBJECT_DIR] isDirectory:&isDir]) {
		
		if (![[NSFileManager defaultManager] createDirectoryAtPath:[docDir stringByAppendingFormat:@"/%@",PNOBJECT_DIR] withIntermediateDirectories:NO attributes:nil error:&error]) {
#ifdef DEBUG
			NSLogDebug(@"Create directory error: %@", error);
#endif
			return NO;
		}
	}
#ifdef DEBUG
	NSLogDebug(@"%@",[docDir stringByAppendingFormat:@"/%@",PNOBJECT_DIR]);
#endif
	return YES;
}

- (id _Nonnull) saveLocally {
	
	__weak id weakSelf = self;
	
	return [_objectModel saveLocally:weakSelf];
}

- (BOOL) autoRemoveLocally {
	return [_objectModel removeObjectLocally:self];
}

#pragma mark -

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
	NSLogDebug(@"%@",[[[self class] objcetMapping] objectForKey:keyPath]);
	[_JSON setObject:[change objectForKey:@"new"] forKey:[[[self class] objcetMapping] objectForKey:keyPath]];
}

- (void)dealloc
{
	NSDictionary *properties = [PNObject propertiesForClass:self.class];
	
	for (NSString *propertyName in properties) {
		if ([propertyName isEqualToString:@"description"] || [propertyName isEqualToString:@"debugDescription"])  {
			continue;
		}
		[self removeObserver:self forKeyPath:propertyName];
	}
	_JSON = nil;
	_objectMapping = nil;
	_objID = nil;
	_createdAt = nil;
	
}


@end