mirror of
https://github.com/JohnEstropia/CoreStore.git
synced 2026-01-11 22:30:34 +01:00
641 lines
23 KiB
Swift
641 lines
23 KiB
Swift
//
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// CoreStoreObject+Observing.swift
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// CoreStore
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//
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// Copyright © 2018 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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// MARK: - DynamicObject where Self: CoreStoreObject
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extension DynamicObject where Self: CoreStoreObject {
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// MARK: Public
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public func observe<O, V>(
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_ keyPath: KeyPath<Self, FieldContainer<O>.Stored<V>>,
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options: NSKeyValueObservingOptions = [],
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changeHandler: @escaping (Self, CoreStoreObjectValueDiff<V>) -> Void
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) -> CoreStoreObjectKeyValueObservation {
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let result = _CoreStoreObjectKeyValueObservation(
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object: self.rawObject!,
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keyPath: self[keyPath: keyPath].keyPath,
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callback: { (object, kind, newValue, oldValue, _, isPrior) in
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let notification = CoreStoreObjectValueDiff<V>(
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kind: kind,
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newNativeValue: newValue as? V.QueryableNativeType,
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oldNativeValue: oldValue as? V.QueryableNativeType,
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isPrior: isPrior
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)
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changeHandler(
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Self.cs_fromRaw(object: object),
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notification
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)
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}
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)
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result.start(options)
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return result
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}
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}
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// MARK: CoreStoreObjectKeyValueObservation
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/**
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Observation token for `CoreStoreObject` properties. Make sure to retain this instance to keep observing notifications.
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`invalidate()` will be called automatically when an `CoreStoreObjectKeyValueObservation` is deinited.
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*/
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public protocol CoreStoreObjectKeyValueObservation: AnyObject {
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/**
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`invalidate()` will be called automatically when an `CoreStoreObjectKeyValueObservation` is deinited.
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*/
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func invalidate()
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}
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// MARK: - CoreStoreObjectValueDiff
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/**
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The object containing the changeset for an observed `ValueContainer.Required` and `ValueContainer.Optional` property.
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*/
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public final class CoreStoreObjectValueDiff<V: ImportableAttributeType> {
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/**
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Indicates the kind of change. See the comments for `NSObject.observeValue(forKeyPath:of:change:context:)` for more information.
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*/
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public let kind: NSKeyValueChange
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/**
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`newValue` and `oldValue` will only be non-nil if `.new`/`.old` is passed to `observe()`. `newValue` will be `nil` if `isPrior` is `true`.
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*/
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public private(set) lazy var newValue: V? = self.newNativeValue.flatMap(V.cs_fromQueryableNativeType)
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/**
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`newValue` and `oldValue` will only be non-nil if `.new`/`.old` is passed to `observe()`.
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*/
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public private(set) lazy var oldValue: V? = self.oldNativeValue.flatMap(V.cs_fromQueryableNativeType)
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/**
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'isPrior' will be `true` if this change observation is being sent before the change happens, due to `.prior` being passed to `observe()`
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*/
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public let isPrior: Bool
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// MARK: FilePrivate
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fileprivate init(kind: NSKeyValueChange, newNativeValue: V.QueryableNativeType?, oldNativeValue: V.QueryableNativeType?, isPrior: Bool) {
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self.kind = kind
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self.newNativeValue = newNativeValue
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self.oldNativeValue = oldNativeValue
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self.isPrior = isPrior
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}
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// MARK: Private
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private let newNativeValue: V.QueryableNativeType?
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private let oldNativeValue: V.QueryableNativeType?
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}
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// MARK: - CoreStoreObjectValueDiff
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/**
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The object containing the changeset for an observed `TransformableContainer.Required` or `TransformableContainer.Optional` property.
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*/
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public final class CoreStoreObjectTransformableDiff<V: NSCoding & NSCopying> {
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/**
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Indicates the kind of change. See the comments for `NSObject.observeValue(forKeyPath:of:change:context:)` for more information.
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*/
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public let kind: NSKeyValueChange
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/**
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`newValue` and `oldValue` will only be non-nil if `.new`/`.old` is passed to `observe()`. In general, get the most up to date value by accessing it directly on the observed object instead.
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*/
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public let newValue: V?
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/**
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`newValue` and `oldValue` will only be non-nil if `.new`/`.old` is passed to `observe()`. In general, get the most up to date value by accessing it directly on the observed object instead.
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*/
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public let oldValue: V?
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/**
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'isPrior' will be `true` if this change observation is being sent before the change happens, due to `.prior` being passed to `observe()`
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*/
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public let isPrior: Bool
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// MARK: FilePrivate
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fileprivate init(kind: NSKeyValueChange, newValue: V?, oldValue: V?, isPrior: Bool) {
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self.kind = kind
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self.newValue = newValue
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self.oldValue = oldValue
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self.isPrior = isPrior
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}
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}
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// MARK: - CoreStoreObjectObjectDiff
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/**
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The object containing the changeset for an observed `RelationshipContainer.ToOne` property.
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*/
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public final class CoreStoreObjectObjectDiff<D: CoreStoreObject> {
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/**
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Indicates the kind of change. See the comments for `NSObject.observeValue(forKeyPath:of:change:context:)` for more information.
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*/
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public let kind: NSKeyValueChange
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/**
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`newValue` and `oldValue` will only be non-nil if `.new`/`.old` is passed to `observe()`. In general, get the most up to date value by accessing it directly on the observed object instead.
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*/
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public private(set) lazy var newValue: D? = self.newNativeValue.flatMap(D.cs_fromRaw(object:))
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/**
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`newValue` and `oldValue` will only be non-nil if `.new`/`.old` is passed to `observe()`. In general, get the most up to date value by accessing it directly on the observed object instead.
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*/
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public private(set) lazy var oldValue: D? = self.oldNativeValue.flatMap(D.cs_fromRaw(object:))
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/**
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'isPrior' will be `true` if this change observation is being sent before the change happens, due to `.prior` being passed to `observe()`
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*/
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public let isPrior: Bool
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// MARK: FilePrivate
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fileprivate init(
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kind: NSKeyValueChange,
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newNativeValue: CoreStoreManagedObject?,
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oldNativeValue: CoreStoreManagedObject?,
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isPrior: Bool
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) {
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self.kind = kind
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self.newNativeValue = newNativeValue
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self.oldNativeValue = oldNativeValue
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self.isPrior = isPrior
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}
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// MARK: Private
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private let newNativeValue: CoreStoreManagedObject?
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private let oldNativeValue: CoreStoreManagedObject?
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}
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// MARK: - CoreStoreObjectUnorderedDiff
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/**
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The object containing the changeset for an observed `RelationshipContainer.ToManyUnordered` property.
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*/
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public final class CoreStoreObjectUnorderedDiff<D: CoreStoreObject> {
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/**
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Indicates the kind of change. See the comments for `NSObject.observeValue(forKeyPath:of:change:context:)` for more information.
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*/
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public let kind: NSKeyValueChange
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/**
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`newValue` and `oldValue` will only be non-nil if `.new`/`.old` is passed to `observe()`. In general, get the most up to date value by accessing it directly on the observed object instead.
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*/
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public private(set) lazy var newValue: Set<D> = Set(self.newNativeValue.map({ D.cs_fromRaw(object: $0 as! NSManagedObject) }))
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/**
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`newValue` and `oldValue` will only be non-nil if `.new`/`.old` is passed to `observe()`. In general, get the most up to date value by accessing it directly on the observed object instead.
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*/
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public private(set) lazy var oldValue: Set<D> = Set(self.oldNativeValue.map({ D.cs_fromRaw(object: $0 as! NSManagedObject) }))
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/**
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'isPrior' will be `true` if this change observation is being sent before the change happens, due to `.prior` being passed to `observe()`
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*/
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public let isPrior: Bool
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// MARK: FilePrivate
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fileprivate init(
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kind: NSKeyValueChange,
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newNativeValue: NSOrderedSet?,
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oldNativeValue: NSOrderedSet?,
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isPrior: Bool
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) {
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self.kind = kind
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self.newNativeValue = newNativeValue ?? []
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self.oldNativeValue = oldNativeValue ?? []
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self.isPrior = isPrior
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}
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// MARK: Private
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private let newNativeValue: NSOrderedSet
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private let oldNativeValue: NSOrderedSet
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}
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// MARK: - CoreStoreObjectOrderedDiff
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/**
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The object containing the changeset for an observed `RelationshipContainer.Ordered` property.
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*/
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public final class CoreStoreObjectOrderedDiff<D: CoreStoreObject> {
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/**
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Indicates the kind of change. See the comments for `NSObject.observeValue(forKeyPath:of:change:context:)` for more information.
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*/
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public let kind: NSKeyValueChange
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/**
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`newValue` and `oldValue` will only be non-nil if `.new`/`.old` is passed to `observe()`. In general, get the most up to date value by accessing it directly on the observed object instead.
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*/
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public private(set) lazy var newValue: [D] = self.newNativeValue.map({ D.cs_fromRaw(object: $0 as! NSManagedObject) })
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/**
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`newValue` and `oldValue` will only be non-nil if `.new`/`.old` is passed to `observe()`. In general, get the most up to date value by accessing it directly on the observed object instead.
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*/
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public private(set) lazy var oldValue: [D] = self.oldNativeValue.map({ D.cs_fromRaw(object: $0 as! NSManagedObject) })
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/**
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`indexes` will be `nil` unless the observed KeyPath refers to an ordered to-many property
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*/
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public let indexes: IndexSet
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/**
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'isPrior' will be `true` if this change observation is being sent before the change happens, due to `.prior` being passed to `observe()`
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*/
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public let isPrior: Bool
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// MARK: FilePrivate
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fileprivate init(
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kind: NSKeyValueChange,
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newNativeValue: NSArray?,
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oldNativeValue: NSArray?,
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indexes: IndexSet,
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isPrior: Bool
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) {
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self.kind = kind
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self.newNativeValue = newNativeValue ?? []
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self.oldNativeValue = oldNativeValue ?? []
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self.indexes = indexes
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self.isPrior = isPrior
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}
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// MARK: Private
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private let newNativeValue: NSArray
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private let oldNativeValue: NSArray
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}
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// MARK: - AttributeProtocol
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extension AttributeProtocol {
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// MARK: FilePrivate
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fileprivate func observe<O: CoreStoreObject, V: ImportableAttributeType>(with options: NSKeyValueObservingOptions = [], changeHandler: @escaping (O, CoreStoreObjectValueDiff<V>) -> Void) -> CoreStoreObjectKeyValueObservation {
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let result = _CoreStoreObjectKeyValueObservation(
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object: self.rawObject!,
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keyPath: self.keyPath,
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callback: { (object, kind, newValue, oldValue, _, isPrior) in
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let notification = CoreStoreObjectValueDiff<V>(
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kind: kind,
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newNativeValue: newValue as? V.QueryableNativeType,
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oldNativeValue: oldValue as? V.QueryableNativeType,
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isPrior: isPrior
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)
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changeHandler(
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O.cs_fromRaw(object: object),
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notification
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)
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}
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)
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result.start(options)
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return result
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}
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fileprivate func observe<O: CoreStoreObject, V: NSCoding & NSCopying>(with options: NSKeyValueObservingOptions = [], changeHandler: @escaping (O, CoreStoreObjectTransformableDiff<V>) -> Void) -> CoreStoreObjectKeyValueObservation {
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let result = _CoreStoreObjectKeyValueObservation(
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object: self.rawObject!,
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keyPath: self.keyPath,
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callback: { (object, kind, newValue, oldValue, _, isPrior) in
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let notification = CoreStoreObjectTransformableDiff<V>(
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kind: kind,
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newValue: newValue as? V,
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oldValue: oldValue as? V,
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isPrior: isPrior
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)
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changeHandler(
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O.cs_fromRaw(object: object),
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notification
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)
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}
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)
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result.start(options)
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return result
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}
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}
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// MARK: - _CoreStoreObjectKeyValueObservation
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// Mirrored implementation from https://github.com/apple/swift/blob/6e7051eb1e38e743a514555d09256d12d3fec750/stdlib/public/Darwin/Foundation/NSObject.swift#L141
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fileprivate final class _CoreStoreObjectKeyValueObservation: NSObject, CoreStoreObjectKeyValueObservation {
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// MARK: FilePrivate
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@nonobjc
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fileprivate init(
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object: CoreStoreManagedObject,
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keyPath: KeyPathString,
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callback: @escaping (
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_ object: CoreStoreManagedObject,
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_ kind: NSKeyValueChange,
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_ newValue: Any?,
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_ oldValue: Any?,
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_ indexes: IndexSet?,
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_ isPrior: Bool
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) -> Void
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) {
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let _ = _CoreStoreObjectKeyValueObservation.swizzler
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self.keyPath = keyPath
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self.object = object
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self.callback = callback
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}
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@nonobjc
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fileprivate func start(_ options: NSKeyValueObservingOptions) {
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self.object?
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.addObserver(
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self,
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forKeyPath: self.keyPath,
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options: options,
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context: nil
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)
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}
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deinit {
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self.object?
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.removeObserver(self, forKeyPath: self.keyPath, context: nil)
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}
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// MARK: DynamicObjectKeyValueObservation
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@nonobjc
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public func invalidate() {
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self.object?
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.removeObserver(self, forKeyPath: self.keyPath, context: nil)
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self.object = nil
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}
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// MARK: Private
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// workaround for <rdar://problem/31640524> Erroneous (?) error when using bridging in the Foundation overlay
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@nonobjc
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static var swizzler: Any? = Internals.with {
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let bridgeClass: AnyClass = _CoreStoreObjectKeyValueObservation.self
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let rootObserveImpl = class_getInstanceMethod(
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bridgeClass,
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#selector(
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_CoreStoreObjectKeyValueObservation
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.observeValue(forKeyPath:of:change:context:)
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)
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)!
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let swapObserveImpl = class_getInstanceMethod(
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bridgeClass,
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#selector(
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_CoreStoreObjectKeyValueObservation
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._cs_swizzle_me_observeValue(forKeyPath:of:change:context:)
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)
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)!
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method_exchangeImplementations(rootObserveImpl, swapObserveImpl)
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return nil
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}
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@nonobjc
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private weak var object: CoreStoreManagedObject?
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@nonobjc
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private let callback: (
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_ object: CoreStoreManagedObject,
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_ kind: NSKeyValueChange,
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_ newValue: Any?,
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_ oldValue: Any?,
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_ indexes: IndexSet?,
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_ isPrior: Bool
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) -> Void
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@nonobjc
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private let keyPath: KeyPathString
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@objc
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private dynamic func _cs_swizzle_me_observeValue(
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forKeyPath keyPath: String?,
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of object: Any?,
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change: [NSString: Any]?,
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context: UnsafeMutableRawPointer?
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) {
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guard
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let object = object as? CoreStoreManagedObject,
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object == self.object,
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let change = change
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else {
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return
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}
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let rawKind: UInt = change[NSKeyValueChangeKey.kindKey.rawValue as NSString] as! UInt
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self.callback(
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object,
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NSKeyValueChange(rawValue: rawKind)!,
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change[NSKeyValueChangeKey.newKey.rawValue as NSString],
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change[NSKeyValueChangeKey.oldKey.rawValue as NSString],
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change[NSKeyValueChangeKey.indexesKey.rawValue as NSString] as! IndexSet?,
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change[NSKeyValueChangeKey.notificationIsPriorKey.rawValue as NSString] as! Bool? ?? false
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)
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}
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}
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// MARK: - Deprecated
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@available(*, deprecated, message: """
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Legacy `Value.*`, `Transformable.*`, and `Relationship.*` declarations will soon be obsoleted. Please migrate your models and stores to new models that use `@Field.*` property wrappers. See: https://github.com/JohnEstropia/CoreStore?tab=readme-ov-file#new-field-property-wrapper-syntax
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""")
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extension ValueContainer.Required {
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public func observe(options: NSKeyValueObservingOptions = [], changeHandler: @escaping (O, CoreStoreObjectValueDiff<V>) -> Void) -> CoreStoreObjectKeyValueObservation {
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return self.observe(with: options, changeHandler: changeHandler)
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}
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}
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@available(*, deprecated, message: """
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Legacy `Value.*`, `Transformable.*`, and `Relationship.*` declarations will soon be obsoleted. Please migrate your models and stores to new models that use `@Field.*` property wrappers. See: https://github.com/JohnEstropia/CoreStore?tab=readme-ov-file#new-field-property-wrapper-syntax
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""")
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extension ValueContainer.Optional {
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public func observe(options: NSKeyValueObservingOptions = [], changeHandler: @escaping (O, CoreStoreObjectValueDiff<V>) -> Void) -> CoreStoreObjectKeyValueObservation {
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return self.observe(with: options, changeHandler: changeHandler)
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}
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}
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|
|
@available(*, deprecated, message: """
|
|
Legacy `Value.*`, `Transformable.*`, and `Relationship.*` declarations will soon be obsoleted. Please migrate your models and stores to new models that use `@Field.*` property wrappers. See: https://github.com/JohnEstropia/CoreStore?tab=readme-ov-file#new-field-property-wrapper-syntax
|
|
""")
|
|
extension TransformableContainer.Required {
|
|
|
|
public func observe(options: NSKeyValueObservingOptions = [], changeHandler: @escaping (O, CoreStoreObjectTransformableDiff<V>) -> Void) -> CoreStoreObjectKeyValueObservation {
|
|
|
|
return self.observe(with: options, changeHandler: changeHandler)
|
|
}
|
|
}
|
|
|
|
@available(*, deprecated, message: """
|
|
Legacy `Value.*`, `Transformable.*`, and `Relationship.*` declarations will soon be obsoleted. Please migrate your models and stores to new models that use `@Field.*` property wrappers. See: https://github.com/JohnEstropia/CoreStore?tab=readme-ov-file#new-field-property-wrapper-syntax
|
|
""")
|
|
extension TransformableContainer.Optional {
|
|
|
|
public func observe(options: NSKeyValueObservingOptions = [], changeHandler: @escaping (O, CoreStoreObjectTransformableDiff<V>) -> Void) -> CoreStoreObjectKeyValueObservation {
|
|
|
|
return self.observe(with: options, changeHandler: changeHandler)
|
|
}
|
|
}
|
|
|
|
@available(*, deprecated, message: """
|
|
Legacy `Value.*`, `Transformable.*`, and `Relationship.*` declarations will soon be obsoleted. Please migrate your models and stores to new models that use `@Field.*` property wrappers. See: https://github.com/JohnEstropia/CoreStore?tab=readme-ov-file#new-field-property-wrapper-syntax
|
|
""")
|
|
extension RelationshipContainer.ToOne {
|
|
|
|
public func observe(options: NSKeyValueObservingOptions = [], changeHandler: @escaping (O, CoreStoreObjectObjectDiff<D>) -> Void) -> CoreStoreObjectKeyValueObservation {
|
|
|
|
let result = _CoreStoreObjectKeyValueObservation(
|
|
object: self.rawObject!,
|
|
keyPath: self.keyPath,
|
|
callback: { (object, kind, newValue, oldValue, _, isPrior) in
|
|
|
|
let notification = CoreStoreObjectObjectDiff<D>(
|
|
kind: kind,
|
|
newNativeValue: newValue as! CoreStoreManagedObject?,
|
|
oldNativeValue: oldValue as! CoreStoreManagedObject?,
|
|
isPrior: isPrior
|
|
)
|
|
changeHandler(
|
|
O.cs_fromRaw(object: object),
|
|
notification
|
|
)
|
|
}
|
|
)
|
|
result.start(options)
|
|
return result
|
|
}
|
|
}
|
|
|
|
@available(*, deprecated, message: """
|
|
Legacy `Value.*`, `Transformable.*`, and `Relationship.*` declarations will soon be obsoleted. Please migrate your models and stores to new models that use `@Field.*` property wrappers. See: https://github.com/JohnEstropia/CoreStore?tab=readme-ov-file#new-field-property-wrapper-syntax
|
|
""")
|
|
extension RelationshipContainer.ToManyUnordered {
|
|
|
|
public func observe(options: NSKeyValueObservingOptions = [], changeHandler: @escaping (O, CoreStoreObjectUnorderedDiff<D>) -> Void) -> CoreStoreObjectKeyValueObservation {
|
|
|
|
let result = _CoreStoreObjectKeyValueObservation(
|
|
object: self.rawObject!,
|
|
keyPath: self.keyPath,
|
|
callback: { (object, kind, newValue, oldValue, _, isPrior) in
|
|
|
|
let notification = CoreStoreObjectUnorderedDiff<D>(
|
|
kind: kind,
|
|
newNativeValue: newValue as! NSOrderedSet?,
|
|
oldNativeValue: oldValue as! NSOrderedSet?,
|
|
isPrior: isPrior
|
|
)
|
|
changeHandler(
|
|
O.cs_fromRaw(object: object),
|
|
notification
|
|
)
|
|
}
|
|
)
|
|
result.start(options)
|
|
return result
|
|
}
|
|
}
|
|
|
|
@available(*, deprecated, message: """
|
|
Legacy `Value.*`, `Transformable.*`, and `Relationship.*` declarations will soon be obsoleted. Please migrate your models and stores to new models that use `@Field.*` property wrappers. See: https://github.com/JohnEstropia/CoreStore?tab=readme-ov-file#new-field-property-wrapper-syntax
|
|
""")
|
|
extension RelationshipContainer.ToManyOrdered {
|
|
|
|
public func observe(options: NSKeyValueObservingOptions = [], changeHandler: @escaping (O, CoreStoreObjectOrderedDiff<D>) -> Void) -> CoreStoreObjectKeyValueObservation {
|
|
|
|
let result = _CoreStoreObjectKeyValueObservation(
|
|
object: self.rawObject!,
|
|
keyPath: self.keyPath,
|
|
callback: { (object, kind, newValue, oldValue, indexes, isPrior) in
|
|
|
|
let notification = CoreStoreObjectOrderedDiff<D>(
|
|
kind: kind,
|
|
newNativeValue: newValue as! NSArray?,
|
|
oldNativeValue: oldValue as! NSArray?,
|
|
indexes: indexes ?? IndexSet(),
|
|
isPrior: isPrior
|
|
)
|
|
changeHandler(
|
|
O.cs_fromRaw(object: object),
|
|
notification
|
|
)
|
|
}
|
|
)
|
|
result.start(options)
|
|
return result
|
|
}
|
|
}
|