Generic Statuses list

Packages/Account/Sources/Account/AccountDetailView.swift

@@ -21,8 +21,7 @@ public struct AccountDetailView: View {
     ScrollView {
       LazyVStack {
         headerView
-        statusesView
+        StatusesListView(fetcher: viewModel)
-          .padding(.horizontal, 16)
       }
     }
     .edgesIgnoringSafeArea(.top)
@@ -46,47 +45,6 @@ public struct AccountDetailView: View {
     }
     
   }
-  
-  @ViewBuilder
-  private var statusesView: some View {
-    switch viewModel.statusesState {
-    case .loading:
-      ForEach(Status.placeholders()) { status in
-        StatusRowView(status: status)
-          .redacted(reason: .placeholder)
-          .shimmering()
-        Divider()
-      }
-    case let .error(error):
-      Text(error.localizedDescription)
-    case let .display(statuses, nextPageState):
-      ForEach(statuses) { status in
-        StatusRowView(status: status)
-        Divider()
-          .padding(.bottom, DS.Constants.layoutPadding)
-      }
-      
-      switch nextPageState {
-      case .hasNextPage:
-        loadingRow
-          .onAppear {
-            Task {
-              await viewModel.loadNextPage()
-            }
-          }
-      case .loadingNextPage:
-        loadingRow
-      }
-    }
-  }
-  
-  private var loadingRow: some View {
-    HStack {
-      Spacer()
-      ProgressView()
-      Spacer()
-    }
-  }
 }
 
 struct AccountDetailView_Previews: PreviewProvider {

Packages/Account/Sources/Account/AccountDetailViewModel.swift

@@ -1,24 +1,17 @@
 import SwiftUI
 import Network
 import Models
+import Status
 
 @MainActor
-class AccountDetailViewModel: ObservableObject {
+class AccountDetailViewModel: ObservableObject, StatusesFetcher {
   let accountId: String
   var client: Client = .init(server: "")
   
   enum State {
     case loading, data(account: Account), error(error: Error)
   }
-  
+
-  enum StatusesState {
-    enum PagingState {
-      case hasNextPage, loadingNextPage
-    }
-    case loading
-    case display(statuses: [Status], nextPageState: StatusesState.PagingState)
-    case error(error: Error)
-  }
   
   @Published var state: State = .loading
   @Published var statusesState: StatusesState = .loading
@@ -52,7 +45,7 @@ class AccountDetailViewModel: ObservableObject {
     }
   }
   
-  func loadNextPage() async {
+  func fetchNextPage() async {
     do {
       guard let lastId = statuses.last?.id else { return }
       statusesState = .display(statuses: statuses, nextPageState: .loadingNextPage)

Packages/Status/.swiftpm/xcode/xcshareddata/xcschemes/Status.xcscheme

@@ -0,0 +1,77 @@
+<?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 = "Status"
+               BuildableName = "Status"
+               BlueprintName = "Status"
+               ReferencedContainer = "container:">
+            </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 = "StatusTests"
+               BuildableName = "StatusTests"
+               BlueprintName = "StatusTests"
+               ReferencedContainer = "container:">
+            </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">
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "Status"
+            BuildableName = "Status"
+            BlueprintName = "Status"
+            ReferencedContainer = "container:">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

Packages/Status/Package.swift

@@ -17,6 +17,7 @@ let package = Package(
     .package(name: "Models", path: "../Models"),
     .package(name: "Routeur", path: "../Routeur"),
     .package(name: "DesignSystem", path: "../DesignSystem"),
+    .package(url: "https://github.com/markiv/SwiftUI-Shimmer", exact: "1.1.0")
   ],
   targets: [
     .target(
@@ -25,6 +26,7 @@ let package = Package(
         .product(name: "Models", package: "Models"),
         .product(name: "Routeur", package: "Routeur"),
         .product(name: "DesignSystem", package: "DesignSystem"),
+        .product(name: "Shimmer", package: "SwiftUI-Shimmer")
       ]),
   ]
 )

Packages/Status/Sources/Status/StatusesListView.swift

@@ -0,0 +1,72 @@
+import SwiftUI
+import Models
+import Shimmer
+import DesignSystem
+
+public enum StatusesState {
+  public enum PagingState {
+    case hasNextPage, loadingNextPage
+  }
+  case loading
+  case display(statuses: [Status], nextPageState: StatusesState.PagingState)
+  case error(error: Error)
+}
+
+@MainActor
+public protocol StatusesFetcher: ObservableObject {
+  var statusesState: StatusesState { get }
+  func fetchStatuses() async
+  func fetchNextPage() async
+}
+
+public struct StatusesListView<Fetcher>: View where Fetcher: StatusesFetcher {
+  @ObservedObject private var fetcher: Fetcher
+  
+  public init(fetcher: Fetcher) {
+    self.fetcher = fetcher
+  }
+  
+  public var body: some View {
+    Group {
+      switch fetcher.statusesState {
+      case .loading:
+        ForEach(Status.placeholders()) { status in
+          StatusRowView(status: status)
+            .redacted(reason: .placeholder)
+            .shimmering()
+          Divider()
+            .padding(.bottom, DS.Constants.layoutPadding)
+        }
+      case let .error(error):
+        Text(error.localizedDescription)
+      case let .display(statuses, nextPageState):
+        ForEach(statuses) { status in
+          StatusRowView(status: status)
+          Divider()
+            .padding(.bottom, DS.Constants.layoutPadding)
+        }
+        
+        switch nextPageState {
+        case .hasNextPage:
+          loadingRow
+            .onAppear {
+              Task {
+                await fetcher.fetchNextPage()
+              }
+            }
+        case .loadingNextPage:
+          loadingRow
+        }
+      }
+    }
+    .padding(.horizontal, 16)
+  }
+  
+  private var loadingRow: some View {
+    HStack {
+      Spacer()
+      ProgressView()
+      Spacer()
+    }
+  }
+}

Packages/Timeline/Sources/Timeline/TimelineView.swift

@@ -12,34 +12,11 @@ public struct TimelineView: View {
   public init() {}
   
   public var body: some View {
-    List {
+    ScrollView {
-      switch viewModel.state {
+      LazyVStack {
-      case .loading:
+        StatusesListView(fetcher: viewModel)
-        ForEach(Status.placeholders()) { placeholder in
-          StatusRowView(status: placeholder)
-            .redacted(reason: .placeholder)
-            .shimmering()
-        }
-      case let .error(error):
-        Text(error.localizedDescription)
-      case let .display(statuses, nextPageState):
-        ForEach(statuses) { status in
-          StatusRowView(status: status)
-        }
-        switch nextPageState {
-        case .hasNextPage:
-          loadingRow
-            .onAppear {
-              Task {
-                await viewModel.loadNextPage()
-              }
-            }
-        case .loadingNextPage:
-          loadingRow
-        }
       }
     }
-    .listStyle(.plain)
     .navigationTitle(viewModel.timeline.rawValue)
     .navigationBarTitleDisplayMode(.inline)
     .toolbar {
@@ -50,22 +27,15 @@ public struct TimelineView: View {
     .task {
       viewModel.client = client
       if !didAppear {
-        await viewModel.refreshTimeline()
+        await viewModel.fetchStatuses()
         didAppear = true
       }
     }
     .refreshable {
-      await viewModel.refreshTimeline()
+      await viewModel.fetchStatuses()
     }
   }
   
-  private var loadingRow: some View {
-    HStack {
-      Spacer()
-      ProgressView()
-      Spacer()
-    }
-  }
   
   private var timelineFilterButton: some View {
     Menu {

Packages/Timeline/Sources/Timeline/TimelineViewModel.swift

@@ -1,18 +1,10 @@
 import SwiftUI
 import Network
 import Models
+import Status
 
 @MainActor
-class TimelineViewModel: ObservableObject {
+class TimelineViewModel: ObservableObject, StatusesFetcher {
-  enum State {
-    enum PagingState {
-      case hasNextPage, loadingNextPage
-    }
-    case loading
-    case display(statuses: [Status], nextPageState: State.PagingState)
-    case error(error: Error)
-  }
-  
   enum TimelineFilter: String, CaseIterable {
     case pub = "Public"
     case home = "Home"
@@ -33,12 +25,12 @@ class TimelineViewModel: ObservableObject {
   
   private var statuses: [Status] = []
   
-  @Published var state: State = .loading
+  @Published var statusesState: StatusesState = .loading
   @Published var timeline: TimelineFilter = .pub {
     didSet {
       if oldValue != timeline {
         Task {
-          await refreshTimeline()
+          await fetchStatuses()
         }
       }
     }
@@ -48,25 +40,25 @@ class TimelineViewModel: ObservableObject {
     client.server
   }
     
-  func refreshTimeline() async {
+  func fetchStatuses() async {
     do {
-      state = .loading
+      statusesState = .loading
       statuses = try await client.get(endpoint: timeline.endpoint(sinceId: nil))
-      state = .display(statuses: statuses, nextPageState: .hasNextPage)
+      statusesState = .display(statuses: statuses, nextPageState: .hasNextPage)
     } catch {
-      state = .error(error: error)
+      statusesState = .error(error: error)
     }
   }
   
-  func loadNextPage() async {
+  func fetchNextPage() async {
     do {
       guard let lastId = statuses.last?.id else { return }
-      state = .display(statuses: statuses, nextPageState: .loadingNextPage)
+      statusesState = .display(statuses: statuses, nextPageState: .loadingNextPage)
       let newStatuses: [Status] = try await client.get(endpoint: timeline.endpoint(sinceId: lastId))
       statuses.append(contentsOf: newStatuses)
-      state = .display(statuses: statuses, nextPageState: .hasNextPage)
+      statusesState = .display(statuses: statuses, nextPageState: .hasNextPage)
     } catch {
-      state = .error(error: error)
+      statusesState = .error(error: error)
     }
   }
 }