[iOS] add stats for catalog

iphone/Maps/Bookmarks/BookmarksTabViewController.swift

@@ -29,10 +29,18 @@ final class BookmarksTabViewController: TabViewController {
     tabView.headerTextAttributes = [.foregroundColor: UIColor.whitePrimaryText(),
                                     .font: UIFont.medium14()]
     tabView.selectedIndex = activeTab.rawValue
+    tabView.delegate = self
   }
 
   override func viewDidDisappear(_ animated: Bool) {
     super.viewDidDisappear(animated)
-    activeTab = ActiveTab.init(rawValue: tabView.selectedIndex) ?? .user
+    activeTab = ActiveTab.init(rawValue: tabView.selectedIndex ?? 0) ?? .user
+  }
+}
+
+extension BookmarksTabViewController: TabViewDelegate {
+  func tabView(_ tabView: TabView, didSelectTabAt index: Int) {
+    let selectedTab = index == 0 ? "my" : "downloaded"
+    Statistics.logEvent("Bookmarks_Tab_click", withParameters: [kStatValue : selectedTab])
   }
 }

iphone/Maps/Bookmarks/Catalog/CatalogWebViewController.swift

@@ -5,6 +5,7 @@ final class CatalogWebViewController: WebViewController {
   let progressImageView = UIImageView(image: #imageLiteral(resourceName: "ic_24px_spinner"))
   let numberOfTasksLabel = UILabel()
   var deeplink: URL?
+  var statSent = false
 
   @objc init() {
     super.init(url: MWMBookmarksManager.catalogFrontendUrl()!, title: L("routes_and_bookmarks"))!
@@ -94,6 +95,25 @@ final class CatalogWebViewController: WebViewController {
     decisionHandler(.cancel);
   }
 
+  override func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
+    if !statSent {
+      Statistics.logEvent("Bookmarks_Downloaded_Catalogue_open")
+      statSent = true
+    }
+  }
+
+  override func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
+    Statistics.logEvent("Bookmarks_Downloaded_Catalogue_error",
+                        withParameters: [kStatError : kStatUnknown])
+  }
+
+  override func webView(_ webView: WKWebView,
+                        didFailProvisionalNavigation navigation: WKNavigation!,
+                        withError error: Error) {
+    Statistics.logEvent("Bookmarks_Downloaded_Catalogue_error",
+                        withParameters: [kStatError : kStatUnknown])
+  }
+
   func processDeeplink(_ url: URL) {
     let components = URLComponents(url: url, resolvingAgainstBaseURL: false)
     var id = ""

iphone/Maps/Bookmarks/Catalog/DownloadedBookmarksViewController.swift

@@ -52,6 +52,8 @@ class DownloadedBookmarksViewController: MWMViewController {
   @IBAction func onDownloadBookmarks(_ sender: Any) {
     if MWMPlatform.networkConnectionType() == .none {
       MWMAlertViewController.activeAlert().presentNoConnectionAlert();
+      Statistics.logEvent("Bookmarks_Downloaded_Catalogue_error",
+                          withParameters: [kStatError : "no_internet"])
       return
     }
     let webViewController = CatalogWebViewController()

iphone/Maps/Classes/Components/TabView/TabView.swift

@@ -55,6 +55,10 @@ protocol TabViewDataSource: AnyObject {
   func tabView(_ tabView: TabView, titleAt index: Int) -> String?
 }
 
+protocol TabViewDelegate: AnyObject {
+  func tabView(_ tabView: TabView, didSelectTabAt index: Int)
+}
+
 @objcMembers
 @objc(MWMTabView)
 class TabView: UIView {
@@ -72,9 +76,11 @@ class TabView: UIView {
   private var slidingViewLeft: NSLayoutConstraint!
   private var slidingViewWidth: NSLayoutConstraint!
   private lazy var pageCount = { return self.dataSource?.numberOfPages(in: self) ?? 0; }()
-  var selectedIndex = -1
+  var selectedIndex: Int?
+  private var lastSelectedIndex: Int?
 
   weak var dataSource: TabViewDataSource?
+  weak var delegate: TabViewDelegate?
 
   var barTintColor = UIColor.white {
     didSet {
@@ -194,7 +200,7 @@ class TabView: UIView {
     super.layoutSubviews()
     slidingViewWidth.constant = pageCount > 0 ? bounds.width / CGFloat(pageCount) : 0
     tabsContentCollectionView.layoutIfNeeded()
-    if selectedIndex >= 0 {
+    if let selectedIndex = selectedIndex {
       tabsContentCollectionView.scrollToItem(at: IndexPath(item: selectedIndex, section: 0),
                                              at: .left,
                                              animated: false)
@@ -236,14 +242,24 @@ extension TabView : UICollectionViewDelegateFlowLayout {
     }
   }
 
+  func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
+    lastSelectedIndex = selectedIndex
+  }
+
   func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
     selectedIndex = Int(round(scrollView.contentOffset.x / scrollView.bounds.width))
+    if let selectedIndex = selectedIndex, selectedIndex != lastSelectedIndex {
+      delegate?.tabView(self, didSelectTabAt: selectedIndex)
+    }
   }
 
   func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
     if (collectionView == tabsCollectionView) {
-      selectedIndex = indexPath.item
-      tabsContentCollectionView.scrollToItem(at: indexPath, at: .left, animated: true)
+      if selectedIndex != indexPath.item {
+        selectedIndex = indexPath.item
+        tabsContentCollectionView.scrollToItem(at: indexPath, at: .left, animated: true)
+        delegate?.tabView(self, didSelectTabAt: selectedIndex!)
+      }
     }
   }