Clean up data flow so that the list view doesn't refresh on every store change.

day-096/Projects/PadFinder/PadFinder.xcodeproj/project.pbxproj

@@ -7,7 +7,6 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		F32ED61823DF69E6006A5195 /* PadsListContainerView+WelcomeView.swift in Sources */ = {isa = PBXBuildFile; fileRef = F32ED61723DF69E6006A5195 /* PadsListContainerView+WelcomeView.swift */; };
 		F32ED61A23DF91C1006A5195 /* Pad+PadType.swift in Sources */ = {isa = PBXBuildFile; fileRef = F32ED61923DF91C1006A5195 /* Pad+PadType.swift */; };
 		F32ED61D23DF9B46006A5195 /* PadDetailsView.swift in Sources */ = {isa = PBXBuildFile; fileRef = F32ED61C23DF9B46006A5195 /* PadDetailsView.swift */; };
 		F32ED61F23DF9B7C006A5195 /* PadDetailsView+ViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = F32ED61E23DF9B7C006A5195 /* PadDetailsView+ViewModel.swift */; };
@@ -40,10 +39,11 @@
 		F3596BC423E3EE6800FA2C66 /* Cache.swift in Sources */ = {isa = PBXBuildFile; fileRef = F3596BC323E3EE6800FA2C66 /* Cache.swift */; };
 		F3596BC723E3F71500FA2C66 /* Cache+WrappedKey.swift in Sources */ = {isa = PBXBuildFile; fileRef = F3596BC623E3F71500FA2C66 /* Cache+WrappedKey.swift */; };
 		F3596BC923E3F72200FA2C66 /* Cache+Entry.swift in Sources */ = {isa = PBXBuildFile; fileRef = F3596BC823E3F72200FA2C66 /* Cache+Entry.swift */; };
+		F3596BCB23E4298300FA2C66 /* RootView.swift in Sources */ = {isa = PBXBuildFile; fileRef = F3596BCA23E4298300FA2C66 /* RootView.swift */; };
+		F3596BCD23E42BED00FA2C66 /* WelcomeView.swift in Sources */ = {isa = PBXBuildFile; fileRef = F3596BCC23E42BEC00FA2C66 /* WelcomeView.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
-		F32ED61723DF69E6006A5195 /* PadsListContainerView+WelcomeView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "PadsListContainerView+WelcomeView.swift"; sourceTree = "<group>"; };
 		F32ED61923DF91C1006A5195 /* Pad+PadType.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Pad+PadType.swift"; sourceTree = "<group>"; };
 		F32ED61C23DF9B46006A5195 /* PadDetailsView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PadDetailsView.swift; sourceTree = "<group>"; };
 		F32ED61E23DF9B7C006A5195 /* PadDetailsView+ViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "PadDetailsView+ViewModel.swift"; sourceTree = "<group>"; };
@@ -75,6 +75,8 @@
 		F3596BC323E3EE6800FA2C66 /* Cache.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Cache.swift; sourceTree = "<group>"; };
 		F3596BC623E3F71500FA2C66 /* Cache+WrappedKey.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Cache+WrappedKey.swift"; sourceTree = "<group>"; };
 		F3596BC823E3F72200FA2C66 /* Cache+Entry.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Cache+Entry.swift"; sourceTree = "<group>"; };
+		F3596BCA23E4298300FA2C66 /* RootView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RootView.swift; sourceTree = "<group>"; };
+		F3596BCC23E42BEC00FA2C66 /* WelcomeView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WelcomeView.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -162,6 +164,8 @@
 			isa = PBXGroup;
 			children = (
 				F331C47823DDB1430061925E /* Pads */,
+				F3596BCA23E4298300FA2C66 /* RootView.swift */,
+				F3596BCC23E42BEC00FA2C66 /* WelcomeView.swift */,
 			);
 			path = Scenes;
 			sourceTree = "<group>";
@@ -219,7 +223,6 @@
 			children = (
 				F331C47B23DDB1710061925E /* PadsListContainerView.swift */,
 				F32ED61B23DF9B36006A5195 /* Pad Details */,
-				F32ED61723DF69E6006A5195 /* PadsListContainerView+WelcomeView.swift */,
 				F331C49B23DE18650061925E /* PadsListView.swift */,
 				F331C49D23DE187A0061925E /* PadsListView+ViewModel.swift */,
 			);
@@ -358,15 +361,16 @@
 				F356E61E23E25E7A008553B0 /* PadDetailsContainerView.swift in Sources */,
 				F331C48523DDDE710061925E /* AppState.swift in Sources */,
 				F32ED62923E0F0C6006A5195 /* MapSnapshottingService.swift in Sources */,
+				F3596BCB23E4298300FA2C66 /* RootView.swift in Sources */,
 				F32ED61F23DF9B7C006A5195 /* PadDetailsView+ViewModel.swift in Sources */,
 				F331C49C23DE18650061925E /* PadsListView.swift in Sources */,
 				F3596BC723E3F71500FA2C66 /* Cache+WrappedKey.swift in Sources */,
-				F32ED61823DF69E6006A5195 /* PadsListContainerView+WelcomeView.swift in Sources */,
 				F331C48923DDDF0E0061925E /* Pad.swift in Sources */,
 				F331C49623DE0FED0061925E /* PreviewData.swift in Sources */,
 				F32ED62423DFC7D5006A5195 /* Pad+SnapshotUtils.swift in Sources */,
 				F331C48C23DDE6A90061925E /* LaunchLibraryAPIService.swift in Sources */,
 				F32ED62B23E0F0F1006A5195 /* MapSnapshotServicing.swift in Sources */,
+				F3596BCD23E42BED00FA2C66 /* WelcomeView.swift in Sources */,
 				F32ED62623E0D525006A5195 /* Pad+Computeds.swift in Sources */,
 				F32ED62223DFB836006A5195 /* NumberFormatters.swift in Sources */,
 				F331C49E23DE187A0061925E /* PadsListView+ViewModel.swift in Sources */,

day-096/Projects/PadFinder/PadFinder/App/SceneDelegate.swift

@@ -25,7 +25,7 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
             let store = AppStore(initialState: .init(), appReducer: appReducer)
             
             // Create the SwiftUI view that provides the window contents.
-            let entryView = PadsListContainerView()
+            let entryView = RootView()
                 .environmentObject(store)
                 .accentColor(.pink)
             

day-096/Projects/PadFinder/PadFinder/Scenes/Pads/Pad Details/PadDetailsView+ViewModel.swift

@@ -109,7 +109,7 @@ extension PadDetailsView.ViewModel {
             snapshotService
                 .takeSnapshot(cacheKey: cacheKey, size: size, coordinate: pad.coordinate)
                 .assertNoFailure()
-                .print("takeMapSnapshot")
+//                .print("takeMapSnapshot")
                 .map(\.image)
                 .receive(on: DispatchQueue.main)
                 .sink(

day-096/Projects/PadFinder/PadFinder/Scenes/Pads/PadsListContainerView.swift

@@ -19,16 +19,12 @@ struct PadsListContainerView {
 extension PadsListContainerView: View {
 
     var body: some View {
-        NavigationView {
         PadsListView(
             viewModel: .init(padsState: padsState),
             buildDestination: buildDestination(forPad:)
         )
         .navigationBarTitle("Launch Pads")
         .environmentObject(store)
-            
-            WelcomeView()
-        }
         .onAppear(perform: fetchPads)
     }
 }

day-096/Projects/PadFinder/PadFinder/Scenes/Pads/PadsListView+ViewModel.swift

@@ -17,9 +17,7 @@ extension PadsListView {
 
         private let padsState: PadsState
         
-        
         // MARK: - Published Outputs
-        @Published var pads: [Pad] = []
         
 
         // MARK: - Init
@@ -36,26 +34,19 @@ extension PadsListView {
 
 // MARK: - Publishers
 extension PadsListView.ViewModel {
-
-    private var padsStatePublisher: Publishers.Share<AnyPublisher<PadsState, Never>> {
-        CurrentValueSubject(padsState)
-//            .print("padsStatePublisher")
-            .eraseToAnyPublisher()
-            .share()
-    }
-    
-    
-    private var padsFetchingStatePublisher: Publishers.Share<AnyPublisher<PadsState.DataFetchingState, Never>> {
-        padsStatePublisher
-            .map(\.dataFetchingState)
-            .eraseToAnyPublisher()
-            .share()
-    }
 }
 
 
 // MARK: - Computeds
 extension PadsListView.ViewModel {
+    
+    var pads: [Pad] {
+        if case let .fetched(pads) = padsState.dataFetchingState {
+            return pads
+        } else {
+            return []
+        }
+    }
 }
 
 
@@ -69,20 +60,5 @@ extension PadsListView.ViewModel {
 private extension PadsListView.ViewModel {
 
     func setupSubscribers() {
-        padsFetchingStatePublisher
-            .receive(on: DispatchQueue.main)
-            .sink(receiveValue: { (fetchingState: PadsState.DataFetchingState) in
-                switch fetchingState {
-                case .inactive:
-                    self.pads = []
-                case .fetching:
-                    self.pads = []
-                case .fetched(let pads):
-                    self.pads = pads
-                case .errored(_):
-                    fatalError()
-                }
-            })
-            .store(in: &subscriptions)
     }
 }

day-096/Projects/PadFinder/PadFinder/Scenes/Pads/PadsListView.swift

@@ -10,8 +10,6 @@ import SwiftUI
 
 
 struct PadsListView<Destination: View> {
-    @EnvironmentObject private var store: AppStore
-
     @ObservedObject var viewModel: ViewModel
     let buildDestination: ((Pad) -> Destination)
 }

day-096/Projects/PadFinder/PadFinder/Scenes/RootView.swift

@@ -0,0 +1,53 @@
+//
+//  RootView.swift
+//  PadFinder
+//
+//  Created by CypherPoet on 1/31/20.
+// ✌️
+//
+
+import SwiftUI
+
+
+struct RootView {
+    @EnvironmentObject private var store: AppStore
+}
+
+
+// MARK: - View
+extension RootView: View {
+    
+
+    var body: some View {
+        NavigationView {
+            PadsListContainerView()
+            
+            WelcomeView()
+        }
+    }
+}
+
+
+// MARK: - Computeds
+extension RootView {
+}
+
+
+// MARK: - View Variables
+extension RootView {
+}
+
+
+// MARK: - Private Helpers
+private extension RootView {
+}
+
+
+
+// MARK: - Preview
+struct RootView_Previews: PreviewProvider {
+
+    static var previews: some View {
+        RootView()
+    }
+}

day-096/Projects/PadFinder/PadFinder/Scenes/WelcomeView.swift

@@ -2,22 +2,20 @@
 //  WelcomeView.swift
 //  PadFinder
 //
-//  Created by CypherPoet on 1/27/20.
+//  Created by CypherPoet on 1/31/20.
 // ✌️
 //
 
 import SwiftUI
 
 
-extension PadsListContainerView {
 struct WelcomeView {
 
 }
-}
 
 
 // MARK: - View
-extension PadsListContainerView.WelcomeView: View {
+extension WelcomeView: View {
 
     var body: some View {
         
@@ -36,25 +34,25 @@ extension PadsListContainerView.WelcomeView: View {
 
 
 // MARK: - Computeds
-extension PadsListContainerView.WelcomeView {
+extension WelcomeView {
 }
 
 
 // MARK: - View Variables
-extension PadsListContainerView.WelcomeView {
+extension WelcomeView {
 }
 
 
 // MARK: - Private Helpers
-private extension PadsListContainerView.WelcomeView {
+private extension WelcomeView {
 }
 
 
+
 // MARK: - Preview
-struct PadsListContainerView_WelcomeView_Previews: PreviewProvider {
+struct WelcomeView_Previews: PreviewProvider {
 
     static var previews: some View {
-        PadsListContainerView.WelcomeView()
+        WelcomeView()
     }
 }
-