Fix Cmd+3 not properly selecting Explore tab

Having MainSidebarViewController.Item.explore and .tab(.explore) was a
mistake and made it easy to accidentally use the wrong one for the key
command, so use .tab(.explore) for everything.

Closes #519

Tusker/MenuController.swift

@@ -32,7 +32,7 @@ struct MenuController {
     static let sidebarItemKeyCommands: [UIKeyCommand] = [
         sidebarCommand(item: .tab(.timelines), command: "1", action: #selector(MainSplitViewController.handleSidebarCommandTimelines)),
         sidebarCommand(item: .tab(.notifications), command: "2", action: #selector(MainSplitViewController.handleSidebarCommandNotifications)),
-        sidebarCommand(item: .explore, command: "3", action: #selector(MainSplitViewController.handleSidebarCommandExplore)),
+        sidebarCommand(item: .tab(.explore), command: "3", action: #selector(MainSplitViewController.handleSidebarCommandExplore)),
         sidebarCommand(item: .bookmarks, command: "4", action: #selector(MainSplitViewController.handleSidebarCommandBookmarks)),
         sidebarCommand(item: .tab(.myProfile), command: "5", action: #selector(MainSplitViewController.handleSidebarCommandMyProfile)),
     ]

Tusker/Screens/Main/MainSidebarViewController.swift

@@ -43,7 +43,7 @@ class MainSidebarViewController: UIViewController {
     }
     
     var exploreTabItems: [Item] {
-        var items: [Item] = [.explore, .bookmarks, .favorites]
+        var items: [Item] = [.tab(.explore), .bookmarks, .favorites]
         let snapshot = dataSource.snapshot()
         for case let .list(list) in snapshot.itemIdentifiers(inSection: .lists) {
             items.append(.list(list))
@@ -170,7 +170,7 @@ class MainSidebarViewController: UIViewController {
         snapshot.appendItems([
             .tab(.timelines),
             .tab(.notifications),
-            .explore,
+            .tab(.explore),
             .bookmarks,
             .favorites,
             .tab(.myProfile)
@@ -302,7 +302,7 @@ class MainSidebarViewController: UIViewController {
             return UserActivityManager.checkNotificationsActivity(mode: Preferences.shared.defaultNotificationsMode, accountID: id)
         case .tab(.compose):
             return UserActivityManager.newPostActivity(accountID: id)
-        case .explore:
+        case .tab(.explore):
             return UserActivityManager.searchActivity(query: nil, accountID: id)
         case .bookmarks:
             return UserActivityManager.bookmarksActivity(accountID: id)
@@ -340,7 +340,7 @@ extension MainSidebarViewController {
     }
     enum Item: Hashable {
         case tab(MainTabBarViewController.Tab)
-        case explore, bookmarks, favorites
+        case bookmarks, favorites
         case listsHeader, list(List), addList
         case savedHashtagsHeader, savedHashtag(String), addSavedHashtag
         case savedInstancesHeader, savedInstance(URL), addSavedInstance
@@ -349,8 +349,6 @@ extension MainSidebarViewController {
             switch self {
             case let .tab(tab):
                 return tab.title
-            case .explore:
-                return "Explore"
             case .bookmarks:
                 return "Bookmarks"
             case .favorites:
@@ -380,8 +378,6 @@ extension MainSidebarViewController {
             switch self {
             case let .tab(tab):
                 return tab.imageName
-            case .explore:
-                return "magnifyingglass"
             case .bookmarks:
                 return "bookmark"
             case .favorites:

Tusker/Screens/Main/MainSplitViewController.swift

@@ -279,7 +279,7 @@ extension MainSplitViewController: UISplitViewControllerDelegate {
                 $0.1 > $1.1
             }
         if let mostRecentExploreItem = mostRecentExploreItem?.0,
-           mostRecentExploreItem != .explore {
+           mostRecentExploreItem != .tab(.explore) {
             let exploreNav = tabBarViewController.viewController(for: .explore) as! UINavigationController
             // Pop back to root, so we're appending to the Explore VC instead of some other VC
             exploreNav.popToRootViewController(animated: false)
@@ -292,11 +292,7 @@ extension MainSplitViewController: UISplitViewControllerDelegate {
         case nil:
             break
             
-        case let .tab(tab):
+        case .tab(.explore):
-            // sidebar items that map 1 <-> 1 can be transferred directly
-            tabBarViewController.select(tab: tab, dismissPresented: false)
-            
-        case .explore:
             // Search sidebar item maps to the Explore tab with the search controller/results visible
             // The nav stack can't be copied directly, since the split VC uses a different SearchViewController
             // so that explore items aren't shown multiple times.
@@ -335,10 +331,14 @@ extension MainSplitViewController: UISplitViewControllerDelegate {
             }
             
             // Transfer the navigation stack, dropping the search VC, to keep anything the user has opened
-            transferNavigationStack(from: .explore, to: exploreNav, dropFirst: true, append: true)
+            transferNavigationStack(from: .tab(.explore), to: exploreNav, dropFirst: true, append: true)
             
             tabBarViewController.select(tab: .explore, dismissPresented: false)
             
+        case let .tab(tab):
+            // sidebar items that map 1 <-> 1 can be transferred directly
+            tabBarViewController.select(tab: tab, dismissPresented: false)
+
         case .bookmarks, .favorites, .list(_), .savedHashtag(_), .savedInstance(_):
             tabBarViewController.select(tab: .explore, dismissPresented: false)
             // Make sure the Explore VC doesn't show its search bar when it appears, in case the user was previously
@@ -396,9 +396,9 @@ extension MainSplitViewController: UISplitViewControllerDelegate {
                 // For other items, the 2nd VC in the nav stack determines which sidebar item they map to.
                 // Search screen has special considerations, all others can be transferred directly.
                 if tabNavigationStack.count == 1 || ((tabNavigationStack.first as? ExploreViewController)?.searchController?.isActive ?? false) {
-                    exploreItem = .explore
+                    exploreItem = .tab(.explore)
                     // reuse the existing VC, if there is one
-                    let searchVC = getOrCreateNavigationStack(item: .explore).first! as! InlineTrendsViewController
+                    let searchVC = getOrCreateNavigationStack(item: .tab(.explore)).first! as! InlineTrendsViewController
                     // load the view so that the search controller is accessible
                     searchVC.loadViewIfNeeded()
                     let explore = tabNavigationStack.first as! ExploreViewController
@@ -426,16 +426,16 @@ extension MainSplitViewController: UISplitViewControllerDelegate {
                     case let instanceVC as InstanceTimelineViewController:
                         exploreItem = .savedInstance(instanceVC.instanceURL)
                     case is TrendsViewController:
-                        exploreItem = .explore
+                        exploreItem = .tab(.explore)
                         // skip transferring the ExploreViewController and TrendsViewController
                         skipFirst = 2
                         // prepend the InlineTrendsViewController
-                        toPrepend = getOrCreateNavigationStack(item: .explore).first!
+                        toPrepend = getOrCreateNavigationStack(item: .tab(.explore)).first!
                     default:
                         // transfer the navigation stack prepending, the existing explore VC
                         // if there was other stuff on the explore stack, it will get discarded
-                        toPrepend = getOrCreateNavigationStack(item: .explore).first!
+                        toPrepend = getOrCreateNavigationStack(item: .tab(.explore)).first!
-                        exploreItem = .explore
+                        exploreItem = .tab(.explore)
                     }
                 }
                 transferNavigationStack(from: tabNavController, to: exploreItem!, skipFirst: skipFirst, prepend: toPrepend)
@@ -502,10 +502,10 @@ fileprivate extension MainSidebarViewController.Item {
     @MainActor
     func createRootViewController(_ mastodonController: MastodonController) -> UIViewController? {
         switch self {
+        case .tab(.explore):
+            return InlineTrendsViewController(mastodonController: mastodonController)
         case let .tab(tab):
             return tab.createViewController(mastodonController)
-        case .explore:
-            return InlineTrendsViewController(mastodonController: mastodonController)
         case .bookmarks:
             return BookmarksViewController(mastodonController: mastodonController)
         case .favorites:
@@ -562,7 +562,7 @@ extension MainSplitViewController: TuskerRootViewController {
         case .myProfile:
             item = .tab(.myProfile)
         case .explore:
-            item = .explore
+            item = .tab(.explore)
         case .bookmarks:
             item = .bookmarks
         case .list(id: let id):
@@ -616,8 +616,8 @@ extension MainSplitViewController: TuskerRootViewController {
             return
         }
         
-        if sidebar.selectedItem != .explore {
+        if sidebar.selectedItem != .tab(.explore) {
-            select(newItem: .explore, oldItem: sidebar.selectedItem)
+            select(newItem: .tab(.explore), oldItem: sidebar.selectedItem)
         }
         
         guard let searchViewController = secondaryNavController.viewControllers.first as? InlineTrendsViewController else {