Merge pull request #9 from diamirio/feature/sync-actions

add support for sync actions
diamirio · Jan 7, 2024 · 0f89118 · 0f89118
2 parents 2e41b87 + 73d185d
commit 0f89118
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Showing 4 changed files with 70 additions and 7 deletions.
diff --git a/Example/AsyncReactorExample/Features/Repository/Search/RepositorySearchReactor.swift b/Example/AsyncReactorExample/Features/Repository/Search/RepositorySearchReactor.swift
@@ -36,6 +36,10 @@ class RepositorySearchReactor: AsyncReactor {
         case onSortOptionSelected(SortOptions)
     }
 
+    enum SyncAction {
+        case toggleHidePrivate
+    }
+
     struct State {
         var hidePrivate = false
         var query = ""
@@ -92,9 +96,17 @@ class RepositorySearchReactor: AsyncReactor {
             catch {
                 logger.error("error while searching repositories: \(error)")
             }
+
         case .onSortOptionSelected(let option):
             state.sortBy = option
-            UserDefaults.standard.set(state.sortBy.rawValue, forKey: "sortBy")
+            UserDefaults.standard.set(option.rawValue, forKey: "sortBy")
+        }
+    }
+
+    func action(_ action: SyncAction) {
+        switch action {
+        case .toggleHidePrivate:
+            state.hidePrivate.toggle()
         }
     }
 

diff --git a/Example/AsyncReactorExample/Features/Repository/Search/RepositorySearchView.swift b/Example/AsyncReactorExample/Features/Repository/Search/RepositorySearchView.swift
@@ -13,7 +13,7 @@ struct RepositorySearchView: View {
     @EnvironmentObject
     private var reactor: RepositorySearchReactor
 
-    @ActionBinding(RepositorySearchReactor.self, keyPath: \.hidePrivate, action: RepositorySearchReactor.Action.onHidePrivateToggle)
+    @ActionBinding(RepositorySearchReactor.self, keyPath: \.hidePrivate, action: RepositorySearchReactor.SyncAction.toggleHidePrivate)
     private var hidePrivate: Bool
 
     @ActionBinding(RepositorySearchReactor.self, keyPath: \.query, cancelId: .init(id: "enterQuery", mode: .inFlight), action: RepositorySearchReactor.Action.enterQuery)

diff --git a/Sources/AsyncReactor/AsyncReactor+SwiftUI.swift b/Sources/AsyncReactor/AsyncReactor+SwiftUI.swift
@@ -28,38 +28,79 @@ extension AsyncReactor {
     public func bind<T>(_ keyPath: KeyPath<State, T>, cancelId: CancelId? = nil, action: @escaping @autoclosure () -> Action) -> Binding<T> {
         bind(keyPath, cancelId: cancelId) { _ in action() }
     }
+
+    @MainActor
+    public func bind<T>(_ keyPath: KeyPath<State, T>, action: @escaping (T) -> SyncAction) -> Binding<T> {
+        Binding {
+            self.state[keyPath: keyPath]
+        } set: { newValue in
+            self.action(action(newValue))
+        }
+    }
+
+    @MainActor
+    public func bind<T>(_ keyPath: KeyPath<State, T>, action: @escaping @autoclosure () -> SyncAction) -> Binding<T> {
+        bind(keyPath) { _ in action() }
+    }
 }
 
 /// Property wrapper to get a binding to a state keyPath and a associated Action
 /// Can be used and behaves like the `@State` property wrapper
 @MainActor
 @propertyWrapper
-public struct ActionBinding<Reactor: AsyncReactor, Value>: DynamicProperty {
+public struct ActionBinding<Reactor: AsyncReactor, Action, Value>: DynamicProperty {
     let target: EnvironmentObject<Reactor>
 
     let keyPath: KeyPath<Reactor.State, Value>
-    let action: (Value) -> Reactor.Action
+    let action: (Value) -> Action
 
     let cancelId: CancelId?
 
-    public init(_ reactorType: Reactor.Type, keyPath: KeyPath<Reactor.State, Value>, cancelId: CancelId? = nil, action: @escaping (Value) -> Reactor.Action) {
+    public init(_ reactorType: Reactor.Type, keyPath: KeyPath<Reactor.State, Value>, cancelId: CancelId? = nil, action: @escaping (Value) -> Reactor.Action) where Action == Reactor.Action {
         target = EnvironmentObject()
         self.keyPath = keyPath
         self.action = action
         self.cancelId = cancelId
     }
 
-    public init(_ reactorType: Reactor.Type, keyPath: KeyPath<Reactor.State, Value>, cancelId: CancelId? = nil, action: @escaping @autoclosure () -> Reactor.Action) {
+    public init(_ reactorType: Reactor.Type, keyPath: KeyPath<Reactor.State, Value>, cancelId: CancelId? = nil, action: @escaping @autoclosure () -> Reactor.Action) where Action == Reactor.Action {
         self.init(reactorType, keyPath: keyPath, cancelId: cancelId, action: { _ in action() })
     }
 
+    public init(_ reactorType: Reactor.Type, keyPath: KeyPath<Reactor.State, Value>, action: @escaping (Value) -> Reactor.SyncAction) where Action == Reactor.SyncAction {
+        target = EnvironmentObject()
+        self.keyPath = keyPath
+        self.action = action
+        cancelId = nil
+    }
+
+    public init(_ reactorType: Reactor.Type, keyPath: KeyPath<Reactor.State, Value>, action: @escaping @autoclosure () -> Reactor.SyncAction) where Action == Reactor.SyncAction {
+        self.init(reactorType, keyPath: keyPath, action: { _ in action() })
+    }
+
     public var wrappedValue: Value {
         get { projectedValue.wrappedValue }
         nonmutating set { projectedValue.wrappedValue = newValue }
     }
 
     public var projectedValue: Binding<Value> {
-        get { target.wrappedValue.bind(keyPath, cancelId: cancelId, action: action) }
+        get {
+            func bindAction() -> Binding<Value> {
+                target.wrappedValue.bind(keyPath, cancelId: cancelId, action: action as! (Value) -> Reactor.Action)
+            }
+
+            func bindSyncAction() -> Binding<Value> {
+                target.wrappedValue.bind(keyPath, action: action as! (Value) -> Reactor.SyncAction)
+            }
+
+            if Action.self == Reactor.Action.self {
+                return bindAction()
+            } else if Action.self == Reactor.SyncAction.self {
+                return bindSyncAction()
+            } else {
+                fatalError("this should never happen :)")
+            }
+        }
     }
 }
 

diff --git a/Sources/AsyncReactor/AsyncReactor.swift b/Sources/AsyncReactor/AsyncReactor.swift
@@ -10,6 +10,7 @@ import Foundation
 @dynamicMemberLookup
 public protocol AsyncReactor: ObservableObject {
     associatedtype Action
+    associatedtype SyncAction = Never
     associatedtype State
 
     @MainActor
@@ -18,6 +19,9 @@ public protocol AsyncReactor: ObservableObject {
     @MainActor
     func action(_ action: Action) async
 
+    @MainActor
+    func action(_ action: SyncAction)
+
     subscript<Value>(dynamicMember keyPath: KeyPath<State, Value>) -> Value { get }
 }
 
@@ -28,6 +32,12 @@ extension AsyncReactor {
     }
 }
 
+extension AsyncReactor where SyncAction == Never {
+    public func action(_ action: SyncAction) {
+
+    }
+}
+
 // MARK: - DynamicMemberLookup
 
 extension AsyncReactor {