mirror of
https://github.com/JohnEstropia/CoreStore.git
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resurrect utilities for creating NSFetchedResultsController (fixes #119)
This commit is contained in:
John Estropia
@@ -26,199 +26,189 @@
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import Foundation
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import CoreData
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// TODO: Uncomment
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//#if os(iOS) || os(watchOS) || os(tvOS)
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//
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//// MARK: - NSFetchedResultsController
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//
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//public extension NSFetchedResultsController {
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//
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// /**
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// Utility for creating an `NSFetchedResultsController` from a `DataStack`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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//
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// - parameter dataStack: the `DataStack` to observe objects from
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// - parameter from: a `From` clause indicating the entity type
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// - parameter sectionBy: a `SectionBy` clause indicating the keyPath for the attribute to use when sorting the list into sections
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// - parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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// - returns: an `NSFetchedResultsController` that observes a `DataStack`
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// */
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// @nonobjc
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// public static func createFor<T: NSManagedObject>(_ dataStack: DataStack, _ from: From<T>, _ sectionBy: SectionBy, _ fetchClauses: FetchClause...) -> NSFetchedResultsController<NSFetchRequestResult> {
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//
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// return self.createFromContext(
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// dataStack.mainContext,
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// fetchRequest: CoreStoreFetchRequest(),
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// from: from,
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// sectionBy: sectionBy,
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// fetchClauses: fetchClauses
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// )
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// }
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//
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// /**
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// Utility for creating an `NSFetchedResultsController` from a `DataStack`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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//
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// - parameter dataStack: the `DataStack` to observe objects from
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// - parameter from: a `From` clause indicating the entity type
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// - parameter sectionBy: a `SectionBy` clause indicating the keyPath for the attribute to use when sorting the list into sections
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// - parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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// - returns: an `NSFetchedResultsController` that observes a `DataStack`
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// */
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// @nonobjc
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// public static func createFor<T: NSManagedObject>(_ dataStack: DataStack, _ from: From<T>, _ sectionBy: SectionBy, _ fetchClauses: [FetchClause]) -> NSFetchedResultsController {
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//
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// return self.createFromContext(
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// dataStack.mainContext,
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// fetchRequest: CoreStoreFetchRequest(),
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// from: from,
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// sectionBy: sectionBy,
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// fetchClauses: fetchClauses
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// )
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// }
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//
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// /**
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// Utility for creating an `NSFetchedResultsController` from a `DataStack`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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//
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// - parameter dataStack: the `DataStack` to observe objects from
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// - parameter from: a `From` clause indicating the entity type
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// - parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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// - returns: an `NSFetchedResultsController` that observes a `DataStack`
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// */
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// @nonobjc
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// public static func createFor<T: NSManagedObject>(_ dataStack: DataStack, _ from: From<T>, _ fetchClauses: FetchClause...) -> NSFetchedResultsController {
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//
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// return self.createFromContext(
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// dataStack.mainContext,
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// fetchRequest: CoreStoreFetchRequest(),
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// from: from,
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// sectionBy: nil,
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// fetchClauses: fetchClauses
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// )
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// }
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//
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// /**
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// Utility for creating an `NSFetchedResultsController` from a `DataStack`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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//
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// - parameter dataStack: the `DataStack` to observe objects from
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// - parameter from: a `From` clause indicating the entity type
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// - parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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// - returns: an `NSFetchedResultsController` that observes a `DataStack`
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// */
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// @nonobjc
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// public static func createFor<T: NSManagedObject>(_ dataStack: DataStack, _ from: From<T>, _ fetchClauses: [FetchClause]) -> NSFetchedResultsController {
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//
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// return self.createFromContext(
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// dataStack.mainContext,
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// fetchRequest: CoreStoreFetchRequest(),
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// from: from,
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// sectionBy: nil,
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// fetchClauses: fetchClauses
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// )
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// }
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//
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// /**
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// Utility for creating an `NSFetchedResultsController` from an `UnsafeDataTransaction`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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//
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// - parameter transaction: the `UnsafeDataTransaction` to observe objects from
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// - parameter from: a `From` clause indicating the entity type
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// - parameter sectionBy: a `SectionBy` clause indicating the keyPath for the attribute to use when sorting the list into sections
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// - parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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// - returns: an `NSFetchedResultsController` that observes an `UnsafeDataTransaction`
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// */
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// @nonobjc
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// public static func createFor<T: NSManagedObject>(_ transaction: UnsafeDataTransaction, _ from: From<T>, _ sectionBy: SectionBy, _ fetchClauses: FetchClause...) -> NSFetchedResultsController {
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//
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// return self.createFromContext(
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// transaction.context,
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// fetchRequest: CoreStoreFetchRequest(),
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// from: from,
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// sectionBy: sectionBy,
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// fetchClauses: fetchClauses
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// )
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// }
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//
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// /**
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// Utility for creating an `NSFetchedResultsController` from an `UnsafeDataTransaction`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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//
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// - parameter transaction: the `UnsafeDataTransaction` to observe objects from
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// - parameter from: a `From` clause indicating the entity type
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// - parameter sectionBy: a `SectionBy` clause indicating the keyPath for the attribute to use when sorting the list into sections
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// - parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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// - returns: an `NSFetchedResultsController` that observes an `UnsafeDataTransaction`
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// */
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// @nonobjc
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// public static func createFor<T: NSManagedObject>(_ transaction: UnsafeDataTransaction, _ from: From<T>, _ sectionBy: SectionBy, _ fetchClauses: [FetchClause]) -> NSFetchedResultsController {
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//
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// return self.createFromContext(
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// transaction.context,
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// fetchRequest: CoreStoreFetchRequest(),
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// from: from,
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// sectionBy: sectionBy,
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// fetchClauses: fetchClauses
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// )
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// }
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//
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// /**
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// Utility for creating an `NSFetchedResultsController` from an `UnsafeDataTransaction`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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//
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// - parameter transaction: the `UnsafeDataTransaction` to observe objects from
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// - parameter from: a `From` clause indicating the entity type
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// - parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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// - returns: an `NSFetchedResultsController` that observes an `UnsafeDataTransaction`
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// */
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// @nonobjc
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// public static func createFor<T: NSManagedObject>(_ transaction: UnsafeDataTransaction, _ from: From<T>, _ fetchClauses: FetchClause...) -> NSFetchedResultsController {
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//
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// return self.createFromContext(
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// transaction.context,
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// fetchRequest: CoreStoreFetchRequest(),
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// from: from,
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// sectionBy: nil,
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// fetchClauses: fetchClauses
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// )
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// }
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//
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// /**
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// Utility for creating an `NSFetchedResultsController` from an `UnsafeDataTransaction`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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//
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// - parameter transaction: the `UnsafeDataTransaction` to observe objects from
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// - parameter from: a `From` clause indicating the entity type
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// - parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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// */
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// @nonobjc
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// public static func createFor<T: NSManagedObject>(_ transaction: UnsafeDataTransaction, _ from: From<T>, _ fetchClauses: [FetchClause]) -> NSFetchedResultsController {
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//
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// return self.createFromContext(
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// transaction.context,
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// fetchRequest: CoreStoreFetchRequest(),
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// from: from,
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// sectionBy: nil,
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// fetchClauses: fetchClauses
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// )
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// }
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//
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//
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// // MARK: Internal
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//
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// @nonobjc
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// internal static func createFromContext<T: NSManagedObject>(_ context: NSManagedObjectContext, fetchRequest: CoreStoreFetchRequest<T>, from: From<T>? = nil, sectionBy: SectionBy? = nil, fetchClauses: [FetchClause]) -> NSFetchedResultsController<NSFetchRequestResult> {
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//
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// let controller = CoreStoreFetchedResultsController(
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// context: context,
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// fetchRequest: fetchRequest,
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// from: from,
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// sectionBy: sectionBy,
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// applyFetchClauses: { fetchRequest in
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//
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// fetchClauses.forEach { $0.applyToFetchRequest(fetchRequest) }
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//
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// CoreStore.assert(
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// fetchRequest.sortDescriptors?.isEmpty == false,
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// "An \(cs_typeName(NSFetchedResultsController<T>.self)) requires a sort information. Specify from a \(cs_typeName(OrderBy.self)) clause or any custom \(cs_typeName(FetchClause.self)) that provides a sort descriptor."
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// )
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// }
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// )
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// return controller.upcast()
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// }
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//}
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//
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//#endif
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#if os(iOS) || os(watchOS) || os(tvOS)
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// MARK: - DataStack
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public extension DataStack {
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/**
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Utility for creating an `NSFetchedResultsController` from the `DataStack`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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- parameter from: a `From` clause indicating the entity type
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- parameter sectionBy: a `SectionBy` clause indicating the keyPath for the attribute to use when sorting the list into sections
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- parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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- returns: an `NSFetchedResultsController` that observes the `DataStack`
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*/
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@nonobjc
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public func createFetchedResultsController<T: NSManagedObject>(_ from: From<T>, _ sectionBy: SectionBy, _ fetchClauses: FetchClause...) -> NSFetchedResultsController<T> {
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return createFRC(
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fromContext: self.mainContext,
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from: from,
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sectionBy: sectionBy,
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fetchClauses: fetchClauses
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)
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}
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/**
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Utility for creating an `NSFetchedResultsController` from a `DataStack`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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- parameter from: a `From` clause indicating the entity type
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- parameter sectionBy: a `SectionBy` clause indicating the keyPath for the attribute to use when sorting the list into sections
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- parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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- returns: an `NSFetchedResultsController` that observes the `DataStack`
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*/
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@nonobjc
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public func createFetchedResultsController<T: NSManagedObject>(_ from: From<T>, _ sectionBy: SectionBy, _ fetchClauses: [FetchClause]) -> NSFetchedResultsController<T> {
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return createFRC(
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fromContext: self.mainContext,
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from: from,
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sectionBy: sectionBy,
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fetchClauses: fetchClauses
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)
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}
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/**
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Utility for creating an `NSFetchedResultsController` from the `DataStack`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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- parameter from: a `From` clause indicating the entity type
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- parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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- returns: an `NSFetchedResultsController` that observes the `DataStack`
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*/
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@nonobjc
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public func createFetchedResultsController<T: NSManagedObject>(_ from: From<T>, _ fetchClauses: FetchClause...) -> NSFetchedResultsController<T> {
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return createFRC(
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fromContext: self.mainContext,
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from: from,
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sectionBy: nil,
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fetchClauses: fetchClauses
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)
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}
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/**
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Utility for creating an `NSFetchedResultsController` from the `DataStack`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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- parameter from: a `From` clause indicating the entity type
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- parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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- returns: an `NSFetchedResultsController` that observes the `DataStack`
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*/
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@nonobjc
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public func createFetchedResultsController<T: NSManagedObject>(forDataStack dataStack: DataStack, _ from: From<T>, _ fetchClauses: [FetchClause]) -> NSFetchedResultsController<T> {
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return createFRC(
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fromContext: self.mainContext,
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from: from,
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sectionBy: nil,
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fetchClauses: fetchClauses
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)
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}
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}
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// MARK: - UnsafeDataTransaction
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public extension UnsafeDataTransaction {
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/**
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Utility for creating an `NSFetchedResultsController` from the `UnsafeDataTransaction`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
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- parameter from: a `From` clause indicating the entity type
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- parameter sectionBy: a `SectionBy` clause indicating the keyPath for the attribute to use when sorting the list into sections
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- parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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- returns: an `NSFetchedResultsController` that observes the `UnsafeDataTransaction`
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*/
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@nonobjc
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public func createFetchedResultsController<T: NSManagedObject>(_ from: From<T>, _ sectionBy: SectionBy, _ fetchClauses: FetchClause...) -> NSFetchedResultsController<T> {
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return createFRC(
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fromContext: self.context,
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from: from,
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sectionBy: sectionBy,
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fetchClauses: fetchClauses
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)
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}
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/**
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Utility for creating an `NSFetchedResultsController` from the `UnsafeDataTransaction`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
|
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- parameter from: a `From` clause indicating the entity type
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- parameter sectionBy: a `SectionBy` clause indicating the keyPath for the attribute to use when sorting the list into sections
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- parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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- returns: an `NSFetchedResultsController` that observes the `UnsafeDataTransaction`
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*/
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@nonobjc
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public func createFetchedResultsController<T: NSManagedObject>(_ from: From<T>, _ sectionBy: SectionBy, _ fetchClauses: [FetchClause]) -> NSFetchedResultsController<T> {
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return createFRC(
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fromContext: self.context,
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from: from,
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sectionBy: sectionBy,
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fetchClauses: fetchClauses
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)
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}
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|
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/**
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Utility for creating an `NSFetchedResultsController` from the `UnsafeDataTransaction`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
|
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|
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- parameter from: a `From` clause indicating the entity type
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- parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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- returns: an `NSFetchedResultsController` that observes the `UnsafeDataTransaction`
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*/
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@nonobjc
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public func createFetchedResultsController<T: NSManagedObject>(_ from: From<T>, _ fetchClauses: FetchClause...) -> NSFetchedResultsController<T> {
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return createFRC(
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fromContext: self.context,
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from: from,
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sectionBy: nil,
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fetchClauses: fetchClauses
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)
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}
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|
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/**
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Utility for creating an `NSFetchedResultsController` from the `UnsafeDataTransaction`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `ListMonitor`s abstraction.
|
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|
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- parameter from: a `From` clause indicating the entity type
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- parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `Where`, `OrderBy`, and `Tweak` clauses.
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- returns: an `NSFetchedResultsController` that observes the `UnsafeDataTransaction`
|
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*/
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@nonobjc
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public func createFetchedResultsController<T: NSManagedObject>(_ from: From<T>, _ fetchClauses: [FetchClause]) -> NSFetchedResultsController<T> {
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return createFRC(
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fromContext: self.context,
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from: from,
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sectionBy: nil,
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fetchClauses: fetchClauses
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)
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}
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}
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// MARK: - Private
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fileprivate func createFRC<T: NSManagedObject>(fromContext context: NSManagedObjectContext, from: From<T>? = nil, sectionBy: SectionBy? = nil, fetchClauses: [FetchClause]) -> NSFetchedResultsController<T> {
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let controller = CoreStoreFetchedResultsController(
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context: context,
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fetchRequest: CoreStoreFetchRequest().dynamicCast(),
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from: from,
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sectionBy: sectionBy,
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applyFetchClauses: { (fetchRequest) in
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fetchClauses.forEach { $0.applyToFetchRequest(fetchRequest as! NSFetchRequest<NSFetchRequestResult>) }
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CoreStore.assert(
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fetchRequest.sortDescriptors?.isEmpty == false,
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"An \(cs_typeName(NSFetchedResultsController<NSManagedObject>.self)) requires a sort information. Specify from a \(cs_typeName(OrderBy.self)) clause or any custom \(cs_typeName(FetchClause.self)) that provides a sort descriptor."
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)
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}
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)
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return controller.dynamicCast()
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}
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#endif
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