59 lines
2.4 KiB
Swift
59 lines
2.4 KiB
Swift
//
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// https://mczachurski.dev
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// Copyright © 2022 Marcin Czachurski and the repository contributors.
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// Licensed under the MIT License.
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//
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import CoreData
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public class CoreDataHandler {
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public static let shared = CoreDataHandler()
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public let container: NSPersistentContainer
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private init(inMemory: Bool = false) {
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container = NSPersistentContainer(name: AppConstants.coreDataPersistantContainerName)
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if inMemory {
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container.persistentStoreDescriptions.first!.url = URL(fileURLWithPath: "/dev/null")
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}
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container.loadPersistentStores(completionHandler: { (storeDescription, error) in
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if let error = error as NSError? {
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// Replace this implementation with code to handle the error appropriately.
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// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
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/*
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Typical reasons for an error here include:
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* The parent directory does not exist, cannot be created, or disallows writing.
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* The persistent store is not accessible, due to permissions or data protection when the device is locked.
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* The device is out of space.
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* The store could not be migrated to the current model version.
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Check the error message to determine what the actual problem was.
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*/
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fatalError("Unresolved error \(error), \(error.userInfo)")
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}
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})
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container.viewContext.automaticallyMergesChangesFromParent = true
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}
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public func newBackgroundContext() -> NSManagedObjectContext {
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self.container.newBackgroundContext()
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}
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public func save() {
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let context = self.container.viewContext
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if context.hasChanges {
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do {
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try context.save()
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} catch {
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// Replace this implementation with code to handle the error appropriately.
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// fatalError() causes the application to generate a crash log and terminate.
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// You should not use this function in a shipping application, although it may be useful during development.
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let nserror = error as NSError
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fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
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}
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}
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}
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}
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