wip

0231-composable-navigation-pt10/Inventory/COW.playground/Contents.swift

@@ -0,0 +1,62 @@
+
+struct Wrapper<Value> {
+  var value: Value {
+    get { self.storage.value }
+    set {
+      if Swift.isKnownUniquelyReferenced(&self.storage) {
+        self.storage.value = newValue
+      } else {
+        self.storage = Storage(value: newValue)
+      }
+    }
+  }
+
+  private var storage: Storage
+
+  init(value: Value) {
+    self.storage = Storage(value: value)
+  }
+
+  mutating func isKnownUniquelyReferenced() -> Bool {
+    Swift.isKnownUniquelyReferenced(&self.storage)
+  }
+
+  private class Storage {
+    var value: Value
+    init(value: Value) {
+      self.value = value
+    }
+  }
+}
+
+import Foundation
+
+extension Wrapper: Equatable where Value: Equatable {
+  static func == (lhs: Self, rhs: Self) -> Bool {
+    if lhs.storage === rhs.storage {
+      return true
+    }
+    Thread.sleep(forTimeInterval: 3)
+    return lhs.value == rhs.value
+  }
+}
+
+var x = Wrapper(value: 1)
+x.isKnownUniquelyReferenced()
+var y = x
+x.isKnownUniquelyReferenced()
+y.isKnownUniquelyReferenced()
+x == y
+x.value = 2
+y.value = 2
+x == y
+y.value
+x.value
+x.isKnownUniquelyReferenced()
+y.isKnownUniquelyReferenced()
+
+var z = 1
+var w = z
+z = 2
+w
+z

0231-composable-navigation-pt10/Inventory/COW.playground/contents.xcplayground

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='macos'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>

0231-composable-navigation-pt10/Inventory/Inventory.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

0231-composable-navigation-pt10/Inventory/Inventory.xcodeproj/xcshareddata/xcschemes/Inventory.xcscheme

@@ -0,0 +1,88 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1420"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "2A3BE9F22994469500351060"
+               BuildableName = "Inventory.app"
+               BlueprintName = "Inventory"
+               ReferencedContainer = "container:Inventory.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "2A3BEA022994469600351060"
+               BuildableName = "InventoryTests.xctest"
+               BlueprintName = "InventoryTests"
+               ReferencedContainer = "container:Inventory.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "2A3BE9F22994469500351060"
+            BuildableName = "Inventory.app"
+            BlueprintName = "Inventory"
+            ReferencedContainer = "container:Inventory.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "2A3BE9F22994469500351060"
+            BuildableName = "Inventory.app"
+            BlueprintName = "Inventory"
+            ReferencedContainer = "container:Inventory.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

0231-composable-navigation-pt10/Inventory/Inventory/Assets.xcassets/AccentColor.colorset/Contents.json

@@ -0,0 +1,11 @@
+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

0231-composable-navigation-pt10/Inventory/Inventory/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,13 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

0231-composable-navigation-pt10/Inventory/Inventory/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

0231-composable-navigation-pt10/Inventory/Inventory/ContentView.swift

@@ -0,0 +1,101 @@
+import ComposableArchitecture
+import SwiftUI
+
+struct AppFeature: Reducer {
+  struct State: Equatable {
+    var firstTab = FirstTabFeature.State()
+    var inventory = InventoryFeature.State()
+    var selectedTab: Tab = .one
+    var thirdTab = ThirdTabFeature.State()
+  }
+  enum Action: Equatable {
+    case firstTab(FirstTabFeature.Action)
+    case inventory(InventoryFeature.Action)
+    case selectedTabChanged(Tab)
+    case thirdTab(ThirdTabFeature.Action)
+  }
+  var body: some ReducerOf<Self> {
+    Reduce<State, Action> { state, action in
+      switch action {
+      case let .firstTab(.delegate(action)):
+        switch action {
+        case .switchToInventoryTab:
+          state.selectedTab = .inventory
+          return .none
+        }
+
+      case let .selectedTabChanged(tab):
+        state.selectedTab = tab
+        return .none
+
+      case .firstTab, .inventory, .thirdTab:
+        return .none
+      }
+    }
+    Scope(state: \.firstTab, action: /Action.firstTab) {
+      FirstTabFeature()
+    }
+    Scope(state: \.inventory, action: /Action.inventory) {
+      InventoryFeature()
+    }
+    Scope(state: \.thirdTab, action: /Action.thirdTab) {
+      ThirdTabFeature()
+    }
+  }
+}
+
+enum Tab {
+  case one, inventory, three
+}
+
+struct ContentView: View {
+  //@State var selectedTab: Tab = .one
+  let store: StoreOf<AppFeature>
+  // Store<AppFeature.State, AppFeature.Action>
+
+  var body: some View {
+    WithViewStore(self.store, observe: \.selectedTab) { viewStore in
+      TabView(selection: viewStore.binding(send: AppFeature.Action.selectedTabChanged)) {
+        FirstTabView(
+          store: self.store.scope(
+            state: \.firstTab,
+            action: AppFeature.Action.firstTab
+          )
+        )
+        .tabItem { Text("One") }
+        .tag(Tab.one)
+
+        NavigationStack {
+          InventoryView(
+            store: self.store.scope(
+              state: \.inventory,
+              action: AppFeature.Action.inventory
+            )
+          )
+        }
+        .tabItem { Text("Inventory") }
+        .tag(Tab.inventory)
+
+        ThirdTabView(
+          store: self.store.scope(
+            state: \.thirdTab,
+            action: AppFeature.Action.thirdTab
+          )
+        )
+        .tabItem { Text("Three") }
+        .tag(Tab.three)
+      }
+    }
+  }
+}
+
+struct ContentView_Previews: PreviewProvider {
+  static var previews: some View {
+    ContentView(
+      store: Store(
+        initialState: AppFeature.State(),
+        reducer: AppFeature()
+      )
+    )
+  }
+}

0231-composable-navigation-pt10/Inventory/Inventory/FirstTab.swift

@@ -0,0 +1,38 @@
+import ComposableArchitecture
+import SwiftUI
+
+struct FirstTabFeature: Reducer {
+  struct State: Equatable {}
+  enum Action: Equatable {
+    case goToInventoryButtonTapped
+    case delegate(Delegate)
+
+    enum Delegate: Equatable {
+      case switchToInventoryTab
+    }
+  }
+
+  func reduce(into state: inout State, action: Action) -> Effect<Action> {
+    switch action {
+    case .delegate:
+      return .none
+
+    case .goToInventoryButtonTapped:
+      return .send(.delegate(.switchToInventoryTab))
+    }
+  }
+}
+
+struct FirstTabView: View {
+  let store: StoreOf<FirstTabFeature>
+
+  var body: some View {
+    WithViewStore(self.store, observe: { $0 }) { viewStore in
+      Button {
+        viewStore.send(.goToInventoryButtonTapped)
+      } label: {
+        Text("Go to inventory")
+      }
+    }
+  }
+}