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Feat: add an extension to subscribe a KeyValuePath to a Publisher #158

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Feat: add an extension to subscribe a KeyValuePath to a Publisher #158

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ec7be9e
Feat: add an extension to subscribe a KeyValuePath to a Publisher
Oni-zerone May 18, 2023
196cdd4
Chore: notation update
Oni-zerone May 18, 2023
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4 changes: 4 additions & 0 deletions CombineExt.xcodeproj/project.pbxproj
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@
63FEBC9527E9FE9000E934AD /* FlatMapFirstTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 63FEBC9427E9FE9000E934AD /* FlatMapFirstTests.swift */; };
712E36C82711B79000A2AAFE /* RetryWhen.swift in Sources */ = {isa = PBXBuildFile; fileRef = 712E36C72711B79000A2AAFE /* RetryWhen.swift */; };
7182326F26DAAF230026BAD3 /* RetryWhenTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7182326E26DAAF230026BAD3 /* RetryWhenTests.swift */; };
973A87492A15FC2A00CBD6D2 /* KeyValueCodingAndObservingSubscribing.swift in Sources */ = {isa = PBXBuildFile; fileRef = 973A87482A15FC2A00CBD6D2 /* KeyValueCodingAndObservingSubscribing.swift */; };
BF330EF924F20032001281FC /* Timer.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF330EF824F20032001281FC /* Timer.swift */; };
BF330EFB24F20080001281FC /* Lock.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF330EFA24F20080001281FC /* Lock.swift */; };
BF3D3B5D253B83F300D830ED /* IgnoreFailure.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF3D3B5C253B83F300D830ED /* IgnoreFailure.swift */; };
Expand Down Expand Up @@ -124,6 +125,7 @@
63FEBC9427E9FE9000E934AD /* FlatMapFirstTests.swift */ = {isa = PBXFileReference; indentWidth = 4; lastKnownFileType = sourcecode.swift; path = FlatMapFirstTests.swift; sourceTree = "<group>"; };
712E36C72711B79000A2AAFE /* RetryWhen.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = RetryWhen.swift; sourceTree = "<group>"; };
7182326E26DAAF230026BAD3 /* RetryWhenTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RetryWhenTests.swift; sourceTree = "<group>"; };
973A87482A15FC2A00CBD6D2 /* KeyValueCodingAndObservingSubscribing.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KeyValueCodingAndObservingSubscribing.swift; sourceTree = "<group>"; };
BF330EF824F20032001281FC /* Timer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Timer.swift; sourceTree = "<group>"; };
BF330EFA24F20080001281FC /* Lock.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Lock.swift; sourceTree = "<group>"; };
BF3D3B5C253B83F300D830ED /* IgnoreFailure.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = IgnoreFailure.swift; sourceTree = "<group>"; };
Expand Down Expand Up @@ -243,6 +245,7 @@
isa = PBXGroup;
children = (
OBJ_12 /* Optional.swift */,
973A87482A15FC2A00CBD6D2 /* KeyValueCodingAndObservingSubscribing.swift */,
);
path = Convenience;
sourceTree = "<group>";
Expand Down Expand Up @@ -636,6 +639,7 @@
OBJ_89 /* Dematerialize.swift in Sources */,
OBJ_90 /* FlatMapLatest.swift in Sources */,
OBJ_91 /* MapMany.swift in Sources */,
973A87492A15FC2A00CBD6D2 /* KeyValueCodingAndObservingSubscribing.swift in Sources */,
712E36C82711B79000A2AAFE /* RetryWhen.swift in Sources */,
EA0D86CF287D19CC0085356E /* MapToResult.swift in Sources */,
1970A8AA25246FBD00799AB6 /* FilterMany.swift in Sources */,
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37 changes: 37 additions & 0 deletions Sources/Convenience/KeyValueCodingAndObservingSubscribing.swift
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//
// KeyValueCodingAndObservingSubscribing.swift
// CombineExt
//
// Created by Andrea Altea on 18/05/23.
//

#if canImport(Combine)
import Foundation
import Combine

@available(OSX 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
protocol KeyValueCodingAndObservingSubscribing: AnyObject where Self : ObjectiveC.NSObject { }

@available(OSX 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
extension KeyValueCodingAndObservingSubscribing {

/// A method to subscribe a KeyValuePath to a Publisher.
func subscribe<P: Publisher, Value>(_ keyPath: ReferenceWritableKeyPath<Self, Value>, to publisher: P) -> AnyCancellable where P.Output == Value, P.Failure == Never {
subscribe(keyPath, to: publisher, on: RunLoop.main)
}

/// A method to subscribe a KeyValuePath to a Publisher.
func subscribe<P: Publisher, S: Scheduler, Value>(_ keyPath: ReferenceWritableKeyPath<Self, Value>, to publisher: P, on scheduler: S) -> AnyCancellable where P.Output == Value, P.Failure == Never {

publisher
.receive(on: scheduler)
.sink { [weak self] value in
self?[keyPath: keyPath] = value
}
}
}

@available(OSX 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
extension NSObject: KeyValueCodingAndObservingSubscribing { }

#endif