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Replace Variable with BehaviorRelay. #65

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Replace Variable with BehaviorRelay. #65

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c69e7b8
Replace `Variable` with `BehaviorRelay`.
Jul 13, 2018
f04b2b2
Remove overlooked old way.
Jul 13, 2018
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4 changes: 4 additions & 0 deletions Reactant.xcodeproj/project.pbxproj
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Original file line number Diff line number Diff line change
Expand Up @@ -76,6 +76,7 @@
22F48FE71FAB0EE900E736C8 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 22F48FE61FAB0EE900E736C8 /* AppDelegate.swift */; };
22F48FEE1FAB0EE900E736C8 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 22F48FED1FAB0EE900E736C8 /* Assets.xcassets */; };
677138D6038E38CF1E2AB7C6 /* Pods_ReactantPrototyping.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 7B0CE169634834E74544F2A0 /* Pods_ReactantPrototyping.framework */; };
687B48BD20F88597002BB4A4 /* BehaviorRelay+mutate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 687B48BC20F88597002BB4A4 /* BehaviorRelay+mutate.swift */; };
71E49563208F37DE00CA3044 /* SubConfiguration.swift in Sources */ = {isa = PBXBuildFile; fileRef = 71E49562208F37DE00CA3044 /* SubConfiguration.swift */; };
71E49567208F38FA00CA3044 /* BaseSubConfiguration.swift in Sources */ = {isa = PBXBuildFile; fileRef = 71E49566208F38FA00CA3044 /* BaseSubConfiguration.swift */; };
71E49569208F398600CA3044 /* Configuration+TableView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 71E49568208F398600CA3044 /* Configuration+TableView.swift */; };
Expand Down Expand Up @@ -283,6 +284,7 @@
22F48FF41FAB0EE900E736C8 /* TVPrototypingTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = TVPrototypingTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
50895ED3801A06D4D45EE033 /* Pods_Reactant.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Reactant.framework; sourceTree = BUILT_PRODUCTS_DIR; };
5A648916F85EF94ED93EB6F6 /* Pods-Reactant.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Reactant.release.xcconfig"; path = "Pods/Target Support Files/Pods-Reactant/Pods-Reactant.release.xcconfig"; sourceTree = "<group>"; };
687B48BC20F88597002BB4A4 /* BehaviorRelay+mutate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "BehaviorRelay+mutate.swift"; sourceTree = "<group>"; };
711603479E5441514316A7F3 /* Pods_ReactantTests.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_ReactantTests.framework; sourceTree = BUILT_PRODUCTS_DIR; };
71E49562208F37DE00CA3044 /* SubConfiguration.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SubConfiguration.swift; sourceTree = "<group>"; };
71E49566208F38FA00CA3044 /* BaseSubConfiguration.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BaseSubConfiguration.swift; sourceTree = "<group>"; };
Expand Down Expand Up @@ -530,6 +532,7 @@
183E0CC21EB88E9C006CF52A /* UILabel+Init.swift */,
183E0CC31EB88E9C006CF52A /* UIOffset+Init.swift */,
183E0CC41EB88E9C006CF52A /* UITableView+Init.swift */,
687B48BC20F88597002BB4A4 /* BehaviorRelay+mutate.swift */,
);
path = Extensions;
sourceTree = "<group>";
Expand Down Expand Up @@ -1613,6 +1616,7 @@
183E0CCF1EB88E9C006CF52A /* UILabel+Init.swift in Sources */,
183457891EB16B8B00C972A4 /* ReactantUI.swift in Sources */,
DC69407F1E51AE9A00C99380 /* ReactantCollectionView+Delegates.swift in Sources */,
687B48BD20F88597002BB4A4 /* BehaviorRelay+mutate.swift in Sources */,
DC1C67F21E5C39F30081E7BD /* Sequence+Utils.swift in Sources */,
DC1C68011E5F574B0081E7BD /* ActivityIndicator.swift in Sources */,
DC6940851E51FC8400C99380 /* FlowCollectionViewBase+Delegates.swift in Sources */,
Expand Down
25 changes: 15 additions & 10 deletions Source/ActivityIndicator/ActivityIndicator.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@ public final class ActivityIndicator<T>: ObservableConvertibleType {

public let disposeBag = DisposeBag()

private let variable: Variable<[(id: UUID, associatedValue: T?)]> = Variable([])
private let behaviorRelay: BehaviorRelay<[(id: UUID, associatedValue: T?)]> = BehaviorRelay(value: [])
private let driver: Driver<E>
private let equalFunction: (T?, T?) -> Bool
fileprivate let defaultAssociatedValue: T?
Expand All @@ -32,10 +32,9 @@ public final class ActivityIndicator<T>: ObservableConvertibleType {

// `self` cannot be captured before all fields are initialized.
let equal = self.equalFunction
driver = variable.asDriver()
driver = behaviorRelay.asDriver()
.map { (loading: !$0.isEmpty, associatedValue: $0.compactMap { $0.associatedValue }.first) }
.distinctUntilChanged { lhs, rhs in lhs.loading == rhs.loading &&
equal(lhs.associatedValue, rhs.associatedValue) }
.distinctUntilChanged { lhs, rhs in lhs.loading == rhs.loading && equal(lhs.associatedValue, rhs.associatedValue) }
}

public func trackActivity<O: ObservableConvertibleType>(of source: O, initialAssociatedValue: T?,
Expand All @@ -50,20 +49,26 @@ public final class ActivityIndicator<T>: ObservableConvertibleType {
let messageChangeDisposable = observable.map(associatedValueProvider)
.startWith(initialAssociatedValue)
.distinctUntilChanged(self.equalFunction)
.subscribe(onNext: {
if let index = self.variable.value.index(where: { $0.id == id }) {
self.variable.value[index].associatedValue = $0
.subscribe(onNext: { associatedValue in
if let index = self.behaviorRelay.value.index(where: { $0.id == id }) {
self.behaviorRelay.mutate(using: {
$0[index].associatedValue = associatedValue
})
} else {
self.variable.value.append((id: id, associatedValue: $0))
self.behaviorRelay.mutate(using: {
$0.append((id: id, associatedValue: associatedValue))
})
}
})

return Disposables.create {
subscriptionDisposable.dispose()
messageChangeDisposable.dispose()

if let index = self.variable.value.index(where: { $0.id == id }) {
self.variable.value.remove(at: index)
if let index = self.behaviorRelay.value.index(where: { $0.id == id }) {
self.behaviorRelay.mutate(using: {
$0.remove(at: index)
})
}
}
}
Expand Down
17 changes: 17 additions & 0 deletions Source/Core/Styling/Extensions/BehaviorRelay+mutate.swift
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Original file line number Diff line number Diff line change
@@ -0,0 +1,17 @@
//
// BehaviorRelay+mutate.swift
// Reactant
//
// Created by Matyáš Kříž on 13/07/2018.
// Copyright © 2018 Brightify. All rights reserved.
//

import RxCocoa

extension BehaviorRelay {
internal func mutate(using mutator: (inout Element) -> Void) {
var mutableValue = value
mutator(&mutableValue)
accept(mutableValue)
}
}