mirror of
https://github.com/JohnEstropia/CoreStore.git
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651 lines
26 KiB
Swift
651 lines
26 KiB
Swift
//
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// ManagedObjectListController.swift
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// HardcoreData
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//
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// Copyright (c) 2015 John Rommel Estropia
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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import Foundation
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import CoreData
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import GCDKit
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private let ManagedObjectListControllerWillChangeListNotification = "ManagedObjectListControllerWillChangeListNotification"
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private let ManagedObjectListControllerDidChangeListNotification = "ManagedObjectListControllerDidChangeListNotification"
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private let ManagedObjectListControllerDidInsertObjectNotification = "ManagedObjectListControllerDidInsertObjectNotification"
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private let ManagedObjectListControllerDidDeleteObjectNotification = "ManagedObjectListControllerDidDeleteObjectNotification"
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private let ManagedObjectListControllerDidUpdateObjectNotification = "ManagedObjectListControllerDidUpdateObjectNotification"
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private let ManagedObjectListControllerDidMoveObjectNotification = "ManagedObjectListControllerDidMoveObjectNotification"
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private let ManagedObjectListControllerDidInsertSectionNotification = "ManagedObjectListControllerDidInsertSectionNotification"
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private let ManagedObjectListControllerDidDeleteSectionNotification = "ManagedObjectListControllerDidDeleteSectionNotification"
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private let UserInfoKeyObject = "UserInfoKeyObject"
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private let UserInfoKeyIndexPath = "UserInfoKeyIndexPath"
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private let UserInfoKeyNewIndexPath = "UserInfoKeyNewIndexPath"
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private let UserInfoKeySectionInfo = "UserInfoKeySectionInfo"
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private let UserInfoKeySectionIndex = "UserInfoKeySectionIndex"
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private struct NotificationKey {
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static var willChangeList: Void?
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static var didChangeList: Void?
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static var didInsertObject: Void?
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static var didDeleteObject: Void?
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static var didUpdateObject: Void?
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static var didMoveObject: Void?
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static var didInsertSection: Void?
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static var didDeleteSection: Void?
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}
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// MARK: - ManagedObjectListController
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public final class ManagedObjectListController<T: NSManagedObject>: FetchedResultsControllerHandler {
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// MARK: Public
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public subscript(indexPath: NSIndexPath) -> T {
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return self.fetchedResultsController.objectAtIndexPath(indexPath) as! T
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}
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public func numberOfSections() -> Int {
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return self.fetchedResultsController.sections?.count ?? 0
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}
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public func numberOfObjectsInSection(section: Int) -> Int {
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return (self.fetchedResultsController.sections?[section] as? NSFetchedResultsSectionInfo)?.numberOfObjects ?? 0
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}
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public func sectionInfoAtIndex(section: Int) -> NSFetchedResultsSectionInfo {
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return self.fetchedResultsController.sections![section] as! NSFetchedResultsSectionInfo
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}
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public func addObserver<U: ManagedObjectListChangeObserver where U.EntityType == T>(observer: U) {
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HardcoreData.assert(GCDQueue.Main.isCurrentExecutionContext(), "Attempted to add a \(typeName(observer)) outside the main queue.")
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self.registerChangeNotification(
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&NotificationKey.willChangeList,
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name: ManagedObjectListControllerWillChangeListNotification,
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toObserver: observer,
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callback: { [weak observer] (listController) -> Void in
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if let observer = observer {
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observer.managedObjectListWillChange(listController)
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}
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}
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)
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self.registerChangeNotification(
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&NotificationKey.didChangeList,
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name: ManagedObjectListControllerDidChangeListNotification,
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toObserver: observer,
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callback: { [weak observer] (listController) -> Void in
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if let observer = observer {
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observer.managedObjectListDidChange(listController)
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}
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}
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)
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}
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public func addObserver<U: ManagedObjectListObjectObserver where U.EntityType == T>(observer: U) {
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HardcoreData.assert(GCDQueue.Main.isCurrentExecutionContext(), "Attempted to add a \(typeName(observer)) outside the main queue.")
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self.registerChangeNotification(
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&NotificationKey.willChangeList,
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name: ManagedObjectListControllerWillChangeListNotification,
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toObserver: observer,
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callback: { [weak observer] (listController) -> Void in
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if let observer = observer {
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observer.managedObjectListWillChange(listController)
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}
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}
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)
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self.registerChangeNotification(
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&NotificationKey.didChangeList,
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name: ManagedObjectListControllerDidChangeListNotification,
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toObserver: observer,
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callback: { [weak observer] (listController) -> Void in
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if let observer = observer {
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observer.managedObjectListDidChange(listController)
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}
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}
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)
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self.registerObjectNotification(
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&NotificationKey.didInsertObject,
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name: ManagedObjectListControllerDidInsertObjectNotification,
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toObserver: observer,
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callback: { [weak observer] (listController, object, indexPath, newIndexPath) -> Void in
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if let observer = observer {
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observer.managedObjectList(
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listController,
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didInsertObject: object,
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toIndexPath: newIndexPath!
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)
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}
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}
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)
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self.registerObjectNotification(
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&NotificationKey.didDeleteObject,
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name: ManagedObjectListControllerDidDeleteObjectNotification,
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toObserver: observer,
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callback: { [weak observer] (listController, object, indexPath, newIndexPath) -> Void in
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if let observer = observer {
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observer.managedObjectList(
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listController,
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didDeleteObject: object,
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fromIndexPath: indexPath!
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)
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}
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}
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)
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self.registerObjectNotification(
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&NotificationKey.didUpdateObject,
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name: ManagedObjectListControllerDidUpdateObjectNotification,
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toObserver: observer,
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callback: { [weak observer] (listController, object, indexPath, newIndexPath) -> Void in
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if let observer = observer {
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observer.managedObjectList(
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listController,
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didUpdateObject: object,
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atIndexPath: indexPath!
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)
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}
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}
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)
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self.registerObjectNotification(
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&NotificationKey.didMoveObject,
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name: ManagedObjectListControllerDidMoveObjectNotification,
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toObserver: observer,
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callback: { [weak observer] (listController, object, indexPath, newIndexPath) -> Void in
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if let observer = observer {
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observer.managedObjectList(
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listController,
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didMoveObject: object,
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fromIndexPath: indexPath!,
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toIndexPath: newIndexPath!
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)
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}
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}
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)
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}
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public func addObserver<U: ManagedObjectListSectionObserver where U.EntityType == T>(observer: U) {
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HardcoreData.assert(GCDQueue.Main.isCurrentExecutionContext(), "Attempted to add a \(typeName(observer)) outside the main queue.")
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self.registerChangeNotification(
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&NotificationKey.willChangeList,
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name: ManagedObjectListControllerWillChangeListNotification,
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toObserver: observer,
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callback: { [weak observer] (listController) -> Void in
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if let observer = observer {
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observer.managedObjectListWillChange(listController)
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}
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}
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)
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self.registerChangeNotification(
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&NotificationKey.didChangeList,
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name: ManagedObjectListControllerDidChangeListNotification,
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toObserver: observer,
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callback: { [weak observer] (listController) -> Void in
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if let observer = observer {
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observer.managedObjectListDidChange(listController)
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}
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}
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)
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self.registerObjectNotification(
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&NotificationKey.didInsertObject,
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name: ManagedObjectListControllerDidInsertObjectNotification,
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toObserver: observer,
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callback: { [weak observer] (listController, object, indexPath, newIndexPath) -> Void in
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if let observer = observer {
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observer.managedObjectList(
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listController,
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didInsertObject: object,
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toIndexPath: newIndexPath!
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)
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}
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}
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)
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self.registerObjectNotification(
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&NotificationKey.didDeleteObject,
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name: ManagedObjectListControllerDidDeleteObjectNotification,
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toObserver: observer,
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callback: { [weak observer] (listController, object, indexPath, newIndexPath) -> Void in
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if let observer = observer {
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observer.managedObjectList(
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listController,
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didDeleteObject: object,
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fromIndexPath: indexPath!
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)
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}
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}
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)
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self.registerObjectNotification(
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&NotificationKey.didUpdateObject,
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name: ManagedObjectListControllerDidUpdateObjectNotification,
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toObserver: observer,
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callback: { [weak observer] (listController, object, indexPath, newIndexPath) -> Void in
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if let observer = observer {
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observer.managedObjectList(
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listController,
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didUpdateObject: object,
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atIndexPath: indexPath!
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)
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}
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}
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)
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self.registerObjectNotification(
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&NotificationKey.didMoveObject,
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name: ManagedObjectListControllerDidMoveObjectNotification,
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toObserver: observer,
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callback: { [weak observer] (listController, object, indexPath, newIndexPath) -> Void in
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if let observer = observer {
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observer.managedObjectList(
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listController,
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didMoveObject: object,
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fromIndexPath: indexPath!,
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toIndexPath: newIndexPath!
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)
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}
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}
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)
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self.registerSectionNotification(
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&NotificationKey.didInsertSection,
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name: ManagedObjectListControllerDidInsertSectionNotification,
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toObserver: observer,
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callback: { [weak observer] (listController, sectionInfo, sectionIndex) -> Void in
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if let observer = observer {
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observer.managedObjectList(
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listController,
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didInsertSection: sectionInfo,
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toSectionIndex: sectionIndex
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)
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}
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}
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)
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self.registerSectionNotification(
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&NotificationKey.didDeleteSection,
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name: ManagedObjectListControllerDidDeleteSectionNotification,
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toObserver: observer,
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callback: { [weak observer] (listController, sectionInfo, sectionIndex) -> Void in
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if let observer = observer {
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observer.managedObjectList(
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listController,
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didDeleteSection: sectionInfo,
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fromSectionIndex: sectionIndex
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)
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}
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}
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)
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}
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public func removeObserver<U: ManagedObjectListChangeObserver where U.EntityType == T>(observer: U) {
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HardcoreData.assert(GCDQueue.Main.isCurrentExecutionContext(), "Attempted to remove a \(typeName(observer)) outside the main queue.")
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let nilValue: AnyObject? = nil
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setAssociatedRetainedObject(nilValue, forKey: &NotificationKey.willChangeList, inObject: observer)
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setAssociatedRetainedObject(nilValue, forKey: &NotificationKey.didChangeList, inObject: observer)
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setAssociatedRetainedObject(nilValue, forKey: &NotificationKey.didInsertObject, inObject: observer)
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setAssociatedRetainedObject(nilValue, forKey: &NotificationKey.didDeleteObject, inObject: observer)
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setAssociatedRetainedObject(nilValue, forKey: &NotificationKey.didUpdateObject, inObject: observer)
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setAssociatedRetainedObject(nilValue, forKey: &NotificationKey.didMoveObject, inObject: observer)
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setAssociatedRetainedObject(nilValue, forKey: &NotificationKey.didInsertSection, inObject: observer)
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setAssociatedRetainedObject(nilValue, forKey: &NotificationKey.didDeleteSection, inObject: observer)
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}
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// MARK: FetchedResultsControllerHandler
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private func controller(controller: NSFetchedResultsController, didChangeObject anObject: AnyObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?) {
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switch type {
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case .Insert:
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NSNotificationCenter.defaultCenter().postNotificationName(
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ManagedObjectListControllerDidInsertObjectNotification,
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object: self,
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userInfo: [
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UserInfoKeyObject: anObject,
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UserInfoKeyNewIndexPath: newIndexPath!
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]
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)
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case .Delete:
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NSNotificationCenter.defaultCenter().postNotificationName(
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ManagedObjectListControllerDidDeleteObjectNotification,
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object: self,
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userInfo: [
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UserInfoKeyObject: anObject,
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UserInfoKeyIndexPath: indexPath!
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]
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)
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case .Update:
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NSNotificationCenter.defaultCenter().postNotificationName(
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ManagedObjectListControllerDidUpdateObjectNotification,
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object: self,
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userInfo: [
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UserInfoKeyObject: anObject,
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UserInfoKeyIndexPath: indexPath!
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]
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)
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case .Move:
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NSNotificationCenter.defaultCenter().postNotificationName(
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ManagedObjectListControllerDidMoveObjectNotification,
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object: self,
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userInfo: [
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UserInfoKeyObject: anObject,
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UserInfoKeyIndexPath: indexPath!,
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UserInfoKeyNewIndexPath: newIndexPath!
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]
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)
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}
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}
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private func controller(controller: NSFetchedResultsController, didChangeSection sectionInfo: NSFetchedResultsSectionInfo, atIndex sectionIndex: Int, forChangeType type: NSFetchedResultsChangeType) {
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switch type {
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case .Insert:
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NSNotificationCenter.defaultCenter().postNotificationName(
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ManagedObjectListControllerDidInsertSectionNotification,
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object: self,
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userInfo: [
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UserInfoKeySectionInfo: sectionInfo,
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UserInfoKeySectionIndex: NSNumber(integer: sectionIndex)
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]
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)
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case .Delete:
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NSNotificationCenter.defaultCenter().postNotificationName(
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ManagedObjectListControllerDidDeleteSectionNotification,
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object: self,
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userInfo: [
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UserInfoKeySectionInfo: sectionInfo,
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UserInfoKeySectionIndex: NSNumber(integer: sectionIndex)
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]
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)
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default:
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break
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}
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}
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private func controllerWillChangeContent(controller: NSFetchedResultsController) {
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NSNotificationCenter.defaultCenter().postNotificationName(
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ManagedObjectListControllerWillChangeListNotification,
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object: self
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)
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}
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private func controllerDidChangeContent(controller: NSFetchedResultsController) {
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NSNotificationCenter.defaultCenter().postNotificationName(
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ManagedObjectListControllerDidChangeListNotification,
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object: self
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)
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}
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private func controller(controller: NSFetchedResultsController, sectionIndexTitleForSectionName sectionName: String?) -> String? {
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return nil
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}
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// MARK: Internal
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internal init(dataStack: DataStack, entity: T.Type, sectionNameKeyPath: KeyPath?, cacheResults: Bool, queryClauses: [FetchClause]) {
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let context = dataStack.mainContext
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let fetchRequest = NSFetchRequest()
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fetchRequest.entity = context.entityDescriptionForEntityClass(entity)
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fetchRequest.fetchLimit = 0
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fetchRequest.resultType = .ManagedObjectResultType
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for clause in queryClauses {
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clause.applyToFetchRequest(fetchRequest)
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}
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let fetchedResultsController = NSFetchedResultsController(
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fetchRequest: fetchRequest,
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managedObjectContext: context,
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sectionNameKeyPath: sectionNameKeyPath,
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cacheName: (cacheResults
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? "\(self.dynamicType).\(NSUUID())"
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: nil)
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)
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let fetchedResultsControllerDelegate = FetchedResultsControllerDelegate()
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self.fetchedResultsController = fetchedResultsController
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self.fetchedResultsControllerDelegate = fetchedResultsControllerDelegate
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self.parentStack = dataStack
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fetchedResultsControllerDelegate.handler = self
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fetchedResultsControllerDelegate.fetchedResultsController = fetchedResultsController
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var error: NSError?
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if !fetchedResultsController.performFetch(&error) {
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HardcoreData.handleError(
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error ?? NSError(hardcoreDataErrorCode: .UnknownError),
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"Failed to perform fetch on <\(NSFetchedResultsController.self)>.")
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}
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}
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// MARK: Private
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private let fetchedResultsController: NSFetchedResultsController
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private let fetchedResultsControllerDelegate: FetchedResultsControllerDelegate
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private weak var parentStack: DataStack?
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private func registerChangeNotification(notificationKey: UnsafePointer<Void>, name: String, toObserver observer: AnyObject, callback: (listController: ManagedObjectListController<T>) -> Void) {
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setAssociatedRetainedObject(
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NotificationObserver(
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notificationName: name,
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object: self,
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closure: { [weak self] (note) -> Void in
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if let strongSelf = self {
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callback(listController: strongSelf)
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}
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}
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),
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forKey: notificationKey,
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inObject: observer
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)
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}
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private func registerObjectNotification(notificationKey: UnsafePointer<Void>, name: String, toObserver observer: AnyObject, callback: (listController: ManagedObjectListController<T>, object: T, indexPath: NSIndexPath?, newIndexPath: NSIndexPath?) -> Void) {
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setAssociatedRetainedObject(
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NotificationObserver(
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notificationName: name,
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object: self,
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closure: { [weak self] (note) -> Void in
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if let strongSelf = self,
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let userInfo = note.userInfo,
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let object = userInfo[UserInfoKeyObject] as? T {
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callback(
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listController: strongSelf,
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object: object,
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indexPath: userInfo[UserInfoKeyIndexPath] as? NSIndexPath,
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newIndexPath: userInfo[UserInfoKeyNewIndexPath] as? NSIndexPath
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)
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}
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}
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),
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forKey: notificationKey,
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inObject: observer
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)
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}
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private func registerSectionNotification(notificationKey: UnsafePointer<Void>, name: String, toObserver observer: AnyObject, callback: (listController: ManagedObjectListController<T>, sectionInfo: NSFetchedResultsSectionInfo, sectionIndex: Int) -> Void) {
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|
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setAssociatedRetainedObject(
|
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NotificationObserver(
|
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notificationName: name,
|
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object: self,
|
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closure: { [weak self] (note) -> Void in
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|
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if let strongSelf = self,
|
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let userInfo = note.userInfo,
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let sectionInfo = userInfo[UserInfoKeySectionInfo] as? NSFetchedResultsSectionInfo,
|
|
let sectionIndex = (userInfo[UserInfoKeySectionIndex] as? NSNumber)?.integerValue {
|
|
|
|
callback(
|
|
listController: strongSelf,
|
|
sectionInfo: sectionInfo,
|
|
sectionIndex: sectionIndex
|
|
)
|
|
}
|
|
}
|
|
),
|
|
forKey: notificationKey,
|
|
inObject: observer
|
|
)
|
|
}
|
|
}
|
|
|
|
|
|
// MARK: - FetchedResultsControllerHandler
|
|
|
|
private protocol FetchedResultsControllerHandler: class {
|
|
|
|
func controller(controller: NSFetchedResultsController, didChangeObject anObject: AnyObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?)
|
|
|
|
func controller(controller: NSFetchedResultsController, didChangeSection sectionInfo: NSFetchedResultsSectionInfo, atIndex sectionIndex: Int, forChangeType type: NSFetchedResultsChangeType)
|
|
|
|
func controllerWillChangeContent(controller: NSFetchedResultsController)
|
|
|
|
func controllerDidChangeContent(controller: NSFetchedResultsController)
|
|
|
|
func controller(controller: NSFetchedResultsController, sectionIndexTitleForSectionName sectionName: String?) -> String?
|
|
}
|
|
|
|
|
|
// MARK: - FetchedResultsControllerDelegate
|
|
|
|
private final class FetchedResultsControllerDelegate: NSFetchedResultsControllerDelegate {
|
|
|
|
// MARK: NSFetchedResultsControllerDelegate
|
|
|
|
@objc func controllerWillChangeContent(controller: NSFetchedResultsController) {
|
|
|
|
self.handler?.controllerWillChangeContent(controller)
|
|
}
|
|
|
|
@objc func controllerDidChangeContent(controller: NSFetchedResultsController) {
|
|
|
|
self.handler?.controllerDidChangeContent(controller)
|
|
}
|
|
|
|
@objc func controller(controller: NSFetchedResultsController, didChangeObject anObject: AnyObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?) {
|
|
|
|
self.handler?.controller(controller, didChangeObject: anObject, atIndexPath: indexPath, forChangeType: type, newIndexPath: newIndexPath)
|
|
}
|
|
|
|
@objc func controller(controller: NSFetchedResultsController, didChangeSection sectionInfo: NSFetchedResultsSectionInfo, atIndex sectionIndex: Int, forChangeType type: NSFetchedResultsChangeType) {
|
|
|
|
self.handler?.controller(controller, didChangeSection: sectionInfo, atIndex: sectionIndex, forChangeType: type)
|
|
}
|
|
|
|
@objc func controller(controller: NSFetchedResultsController, sectionIndexTitleForSectionName sectionName: String?) -> String? {
|
|
|
|
return self.handler?.controller(controller, sectionIndexTitleForSectionName: sectionName)
|
|
}
|
|
|
|
|
|
// MARK: Private
|
|
|
|
weak var handler: FetchedResultsControllerHandler?
|
|
weak var fetchedResultsController: NSFetchedResultsController? {
|
|
|
|
didSet {
|
|
|
|
oldValue?.delegate = nil
|
|
self.fetchedResultsController?.delegate = self
|
|
}
|
|
}
|
|
|
|
deinit {
|
|
|
|
self.fetchedResultsController?.delegate = nil
|
|
}
|
|
}
|