[iOS] Statistic for the place page state changes

iphone/Maps/Common/Statistics/StatisticsStrings.h

@@ -224,6 +224,8 @@ static NSString * const kStatKML = @"KML";
 static NSString * const kStatKilometers = @"Kilometers";
 static NSString * const kStatLandscape = @"Landscape";
 static NSString * const kStatLanguage = @"Language";
+static NSString * const kStatLat = @"lat";
+static NSString * const kStatLon = @"lon";
 static NSString * const kStatListSettings = @"list_settings";
 static NSString * const kStatLocals = @"Locals";
 static NSString * const kStatLocalsProvider = @"Locals.Maps.Me";
@@ -299,6 +301,7 @@ static NSString * const kStatPlacePageBannerBlank = @"Placepage_Banner_blank";
 static NSString * const kStatPlacePageBannerClick = @"Placepage_Banner_click";
 static NSString * const kStatPlacePageBannerError = @"Placepage_Banner_error";
 static NSString * const kStatPlacePageBannerShow = @"Placepage_Banner_show";
+static NSString * const kStatPlacePageChangeState = @"Placepage_change_state";
 static NSString * const kStatPlacePageDescriptionLinkClick = @"Placepage_Description_Outbound_click";
 static NSString * const kStatPlacePageDescriptionMore = @"Placepage_Description_more";
 static NSString * const kStatPlacePageDescriptionViewAll = @"Placepage_Description_View_all";
@@ -455,6 +458,7 @@ static NSString * const kStatToolbarMenuClick = @"Toolbar_Menu_click";
 static NSString * const kStatTracks = @"tracks";
 static NSString * const kStatTraffic = @"Traffic";
 static NSString * const kStatType = @"type";
+static NSString * const kStatTypes = @"types";
 static NSString * const kStatUGCReviewAuthDeclined = @"UGC_Auth_declined";
 static NSString * const kStatUGCReviewAuthError = @"UGC_Auth_error";
 static NSString * const kStatUGCReviewAuthExternalRequestSuccess =

iphone/Maps/UI/PlacePage/MWMPlacePageManager.mm

@@ -287,6 +287,19 @@ void RegisterEventIfPossible(eye::MapObject::Event::Type const type, place_page:
   [Statistics logEvent:kStatPlacepageSponsoredOpen withParameters:parameters];
 }
 
+- (void)logStateChangeEventWithValue:(NSNumber *)value {
+  MWMPlacePageData * data = self.data;
+  if (data == nil) return;
+  
+  NSString *types = data.statisticsTags;
+  NSNumber *lat = [NSNumber numberWithFloat:data.latLon.m_lat];
+  NSNumber *lon = [NSNumber numberWithFloat:data.latLon.m_lon];
+  [Statistics logEvent:kStatPlacePageChangeState withParameters:@{kStatTypes: types,
+                                                                  kStatLat: lat,
+                                                                  kStatLon: lon,
+                                                                  kStatValue: value}];
+}
+
 #pragma mark - MWMLocationObserver
 
 - (void)onHeadingUpdate:(location::CompassInfo const &)info

iphone/Maps/UI/PlacePage/PlacePageLayout/MWMPlacePageLayout.h

@@ -13,6 +13,8 @@ enum class NodeStatus;
 
 - (void)onExpanded;
 
+- (void)logStateChangeEventWithValue:(NSNumber *)value;
+
 @end
 
 @protocol MWMPlacePageLayoutDataSource<NSObject>

iphone/Maps/UI/PlacePage/PlacePageLayout/MWMiPhonePlacePageLayoutImpl.mm

@@ -17,7 +17,8 @@ CGFloat const kMinOffset = 1;
 typedef NS_ENUM(NSUInteger, MWMOffsetState) {
   MWMOffsetStatePreview,
   MWMOffsetStatePreviewPlus,
-  MWMOffsetStateOpen
+  MWMOffsetStateOpen,
+  MWMOffsetStateFullScreen
 };
 
 typedef NS_ENUM(NSUInteger, MWMScrollDirection) {
@@ -109,7 +110,7 @@ typedef NS_ENUM(NSUInteger, MWMScrollDirection) {
   if (delegate == nil) { return; }
   [delegate onPlacePageTopBoundChanged:self.scrollView.contentOffset.y];
   CGFloat previewOffset = [delegate isPreviewPlus] ? self.previewPlusContentOffset : self.previewContentOffset;
-  [self setAnimatedContentOffset:self.state == MWMOffsetStateOpen ? self.topContentOffset : previewOffset];
+  [self setAnimatedContentOffset:(self.state == MWMOffsetStateOpen || self.state == MWMOffsetStateFullScreen) ? self.topContentOffset : previewOffset];
 }
 
 - (void)updateContentLayout {
@@ -236,7 +237,7 @@ typedef NS_ENUM(NSUInteger, MWMScrollDirection) {
   } else if (actualOffset < previewOffset) {
     (*targetContentOffset).y = 0;
   } else {
-    self.state = MWMOffsetStateOpen;
+    self.state = MWMOffsetStateFullScreen;
   }
 }
 
@@ -281,13 +282,17 @@ typedef NS_ENUM(NSUInteger, MWMScrollDirection) {
       });
     }
   } else {
-    self.state = MWMOffsetStateOpen;
+    self.state = MWMOffsetStateFullScreen;
   }
 }
 
 - (void)setState:(MWMOffsetState)state {
+  if (_state != state) {
+    NSNumber *value = [NSNumber numberWithUnsignedInteger:state];
+    [self.delegate logStateChangeEventWithValue:value];
+  }
   _state = state;
-  BOOL isTop = state == MWMOffsetStateOpen;
+  BOOL isTop = (state == MWMOffsetStateOpen || self.state == MWMOffsetStateFullScreen);
   self.placePageView.anchorImage.transform = isTop ? CGAffineTransformMakeRotation(M_PI)
   : CGAffineTransformIdentity;
   [self.previewLayoutHelper layoutInOpenState:isTop];
@@ -307,7 +312,7 @@ typedef NS_ENUM(NSUInteger, MWMScrollDirection) {
   }
 
   CGFloat offset = 0;
-  if (self.state == MWMOffsetStateOpen) {
+  if (self.state == MWMOffsetStateOpen || self.state == MWMOffsetStateFullScreen) {
     BOOL isPreviewPlus = [self.delegate isPreviewPlus];
     self.state = isPreviewPlus ? MWMOffsetStatePreviewPlus : MWMOffsetStatePreview;
     offset = isPreviewPlus ? self.previewPlusContentOffset : self.previewContentOffset;