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//
// CoreDataStack.m
// Juick
//
// Created by Vitaly Takmazov on 15/10/2017.
// Copyright © 2017 com.juick. All rights reserved.
//
#import "CoreDataStack.h"
@interface CoreDataStack ()
@property (nonatomic, getter=isStoreLoaded) BOOL storeLoaded;
@property (nonatomic, strong) NSPersistentContainer *persistentContainer;
@end
@implementation CoreDataStack
+ (NSURL *)defaultDirectoryURL {
return [NSPersistentContainer defaultDirectoryURL];
}
- (instancetype)initWithName:(NSString *)name {
NSManagedObjectModel *mom = [NSManagedObjectModel mergedModelFromBundles:nil];
if (mom == nil) return nil;
self = [super init];
if (self) {
_storeLoaded = NO;
_shouldAddStoreAsynchronously = YES;
_shouldMigrateStoreAutomatically = YES;
_shouldInferMappingModelAutomatically = YES;
_readOnly = NO;
_persistentContainer = [NSPersistentContainer persistentContainerWithName:name managedObjectModel:mom];
_persistentContainer.viewContext.automaticallyMergesChangesFromParent = YES;
}
return self;
}
- (void)loadStoreWithCompletionHandler:(void(^)(NSError *))handler {
[self loadStoreAtURL:self.storeURL withCompletionHandler:handler];
}
- (void)loadStoreAtURL:(NSURL *)storeURL withCompletionHandler:(void(^)(NSError *))handler {
if (!self.persistentContainer) {
NSError *error = [NSError errorWithDomain:NSCocoaErrorDomain code:NSNotFound userInfo:nil];
if (handler) {
dispatch_async(dispatch_get_main_queue(), ^{
handler(error);
});
}
return;
}
self.persistentContainer.persistentStoreDescriptions = @[[self storeDescriptionWithURL:storeURL]];
[self.persistentContainer loadPersistentStoresWithCompletionHandler:
^(NSPersistentStoreDescription *storeDescription, NSError *error) {
if (error == nil) {
self.storeLoaded = YES;
}
if (handler) {
dispatch_async(dispatch_get_main_queue(), ^{
handler(error);
});
}
}];
}
- (BOOL)persistentStoreExistsAtURL:(NSURL *)storeURL {
if (storeURL.isFileURL &&
[NSFileManager.defaultManager fileExistsAtPath:storeURL.path]) {
return YES;
}
return NO;
}
- (NSURL *)storeURL {
NSArray *descriptions = self.persistentContainer.persistentStoreDescriptions;
NSPersistentStoreDescription *description = [descriptions firstObject];
return description.URL;
}
- (BOOL)destroyPersistentStoreAtURL:(NSURL *)storeURL {
NSError *error = nil;
BOOL result = [self.persistentContainer.persistentStoreCoordinator destroyPersistentStoreAtURL:storeURL withType:NSSQLiteStoreType options:nil error:&error];
return result;
}
- (BOOL)replacePersistentStoreAtURL:(NSURL *)destinationURL withPersistentStoreFromURL:(NSURL *)sourceURL {
NSError *error = nil;
BOOL result = [self.persistentContainer.persistentStoreCoordinator replacePersistentStoreAtURL:destinationURL destinationOptions:nil withPersistentStoreFromURL:sourceURL sourceOptions:nil storeType:NSSQLiteStoreType error:&error];
return result;
}
- (NSManagedObjectContext *)viewContext {
return self.persistentContainer.viewContext;
}
- (NSManagedObjectContext *)newPrivateContext {
return [self.persistentContainer newBackgroundContext];
}
- (void)performBackgroundTask:(void(^)(NSManagedObjectContext *))block {
[self.persistentContainer performBackgroundTask:block];
}
- (NSManagedObjectID *)managedObjectIDForURIRepresentation:(NSURL *)url {
return [self.persistentContainer.persistentStoreCoordinator managedObjectIDForURIRepresentation:url];
}
#pragma mark -
#pragma mark === Private methods ===
#pragma mark -
- (NSPersistentStoreDescription *)storeDescriptionWithURL:(NSURL *)URL {
NSPersistentStoreDescription *description = [NSPersistentStoreDescription persistentStoreDescriptionWithURL:URL];
description.shouldAddStoreAsynchronously = self.shouldAddStoreAsynchronously;
description.shouldMigrateStoreAutomatically = self.shouldMigrateStoreAutomatically;
description.shouldInferMappingModelAutomatically = self.shouldInferMappingModelAutomatically;
description.readOnly = self.isReadOnly;
return description;
}
@end
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