[ios] Added dialog for unsaved changes on delete.

iphone/Maps/Classes/CustomAlert/AlertController/MWMAlertViewController.h

@@ -21,6 +21,7 @@
 - (void)presentLocationAlert;
 - (void)presentLocationServiceNotSupportedAlert;
 - (void)presentNoConnectionAlert;
+- (void)presentUnsavedEditsAlertWithOkBlock:(nonnull TMWMVoidBlock)okBlock;
 - (void)presentNoWiFiAlertWithName:(nonnull NSString *)name okBlock:(nullable TMWMVoidBlock)okBlock;
 - (void)presentPedestrianToastAlert:(BOOL)isFirstLaunch;
 - (void)presentInternalErrorAlert;

iphone/Maps/Classes/CustomAlert/AlertController/MWMAlertViewController.mm

@@ -81,6 +81,11 @@ static NSString * const kAlertControllerNibIdentifier = @"MWMAlertViewController
   [self displayAlert:[MWMAlert noConnectionAlert]];
 }
 
+- (void)presentUnsavedEditsAlertWithOkBlock:(nonnull TMWMVoidBlock)okBlock
+{
+  [self displayAlert:[MWMAlert unsavedEditsAlertWithOkBlock:okBlock]];
+}
+
 - (void)presentNoWiFiAlertWithName:(nonnull NSString *)name okBlock:(nullable TMWMVoidBlock)okBlock
 {
   [self displayAlert:[MWMAlert noWiFiAlertWithName:name okBlock:okBlock]];

iphone/Maps/Classes/CustomAlert/BaseAlert/MWMAlert.h

@@ -17,6 +17,7 @@
 + (MWMAlert *)disabledLocationAlert;
 + (MWMAlert *)noWiFiAlertWithName:(NSString *)name okBlock:(TMWMVoidBlock)okBlock;
 + (MWMAlert *)noConnectionAlert;
++ (MWMAlert *)unsavedEditsAlertWithOkBlock:(TMWMVoidBlock)okBlock;
 + (MWMAlert *)locationServiceNotSupportedAlert;
 + (MWMAlert *)pedestrianToastShareAlert:(BOOL)isFirstLaunch;
 + (MWMAlert *)internalErrorAlert;

iphone/Maps/Classes/CustomAlert/BaseAlert/MWMAlert.mm

@@ -51,6 +51,11 @@
   return [MWMDefaultAlert noConnectionAlert];
 }
 
++ (MWMAlert *)unsavedEditsAlertWithOkBlock:(TMWMVoidBlock)okBlock
+{
+  return [MWMDefaultAlert unsavedEditsAlertWithOkBlock:okBlock];
+}
+
 + (MWMAlert *)locationServiceNotSupportedAlert
 {
   return [MWMDefaultAlert locationServiceNotSupportedAlert];

iphone/Maps/Classes/CustomAlert/DefaultAlert/MWMDefaultAlert.h

@@ -14,6 +14,7 @@
 + (instancetype)disabledLocationAlert;
 + (instancetype)noWiFiAlertWithName:(NSString *)name okBlock:(TMWMVoidBlock)okBlock;
 + (instancetype)noConnectionAlert;
++ (instancetype)unsavedEditsAlertWithOkBlock:(TMWMVoidBlock)okBlock;
 + (instancetype)locationServiceNotSupportedAlert;
 + (instancetype)point2PointAlertWithOkBlock:(TMWMVoidBlock)okBlock needToRebuild:(BOOL)needToRebuild;
 + (instancetype)downloaderNoConnectionAlertWithOkBlock:(TMWMVoidBlock)okBlock;

iphone/Maps/Classes/CustomAlert/DefaultAlert/MWMDefaultAlert.mm

@@ -74,6 +74,16 @@ static NSString * const kDefaultAlertNibName = @"MWMDefaultAlert";
   return alert;
 }
 
++ (instancetype)unsavedEditsAlertWithOkBlock:(TMWMVoidBlock)okBlock
+{
+  kStatisticsEvent = @"Editor unsaved changes on delete";
+  return [self defaultAlertWithTitle:@"editor_unsavde_changes"
+                             message:nil
+                    rightButtonTitle:@"delete"
+                     leftButtonTitle:nil
+                   rightButtonAction:okBlock];
+}
+
 + (instancetype)noWiFiAlertWithName:(NSString *)name okBlock:(TMWMVoidBlock)okBlock
 {
   kStatisticsEvent = @"No WiFi Alert";

iphone/Maps/Classes/MapDownloader/DataSources/MWMMapDownloaderDataSource.mm

@@ -56,6 +56,17 @@ using namespace storage;
   return cell;
 }
 
+- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
+{
+  return NO;
+}
+
+- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
+{
+  if (editingStyle == UITableViewCellEditingStyleDelete)
+    [self.delegate deleteNode:[self countryIdForIndexPath:indexPath]];
+}
+
 #pragma mark - MWMMapDownloaderDataSource
 
 - (BOOL)isParentRoot

iphone/Maps/Classes/MapDownloader/DataSources/MWMMapDownloaderDefaultDataSource.mm

@@ -196,21 +196,6 @@ using namespace storage;
   return (status == NodeStatus::OnDisk || status == NodeStatus::OnDiskOutOfDate || nodeAttrs.m_localMwmCounter != 0);
 }
 
-- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
-{
-  if (editingStyle == UITableViewCellEditingStyleDelete)
-  {
-    [Statistics logEvent:kStatDownloaderMapAction
-          withParameters:@{
-            kStatAction : kStatDelete,
-            kStatIsAuto : kStatNo,
-            kStatFrom : kStatDownloader,
-            kStatScenario : kStatDelete
-          }];
-    [MWMStorage deleteNode:[self countryIdForIndexPath:indexPath]];
-  }
-}
-
 #pragma mark - MWMMapDownloaderDataSource
 
 - (TCountryId)parentCountryId

iphone/Maps/Classes/MapDownloader/MWMBaseMapDownloaderViewController.mm

@@ -486,7 +486,7 @@ using namespace storage;
           kStatFrom : kStatDownloader,
           kStatScenario : kStatDelete
         }];
-  [MWMStorage deleteNode:countryId];
+  [MWMStorage deleteNode:countryId alertController:self.alertController];
 }
 
 - (void)cancelNode:(storage::TCountryId const &)countryId

iphone/Maps/Classes/Storage/MWMStorage.h

@@ -7,7 +7,7 @@
 + (void)downloadNode:(storage::TCountryId const &)countryId alertController:(MWMAlertViewController *)alertController onSuccess:(TMWMVoidBlock)onSuccess;
 + (void)retryDownloadNode:(storage::TCountryId const &)countryId;
 + (void)updateNode:(storage::TCountryId const &)countryId alertController:(MWMAlertViewController *)alertController;
-+ (void)deleteNode:(storage::TCountryId const &)countryId;
++ (void)deleteNode:(storage::TCountryId const &)countryId alertController:(MWMAlertViewController *)alertController;
 + (void)cancelDownloadNode:(storage::TCountryId const &)countryId;
 
 @end

iphone/Maps/Classes/Storage/MWMStorage.mm

@@ -30,9 +30,20 @@
   }];
 }
 
-+ (void)deleteNode:(storage::TCountryId const &)countryId
++ (void)deleteNode:(storage::TCountryId const &)countryId alertController:(MWMAlertViewController *)alertController
 {
-  GetFramework().Storage().DeleteNode(countryId);
+  auto & f = GetFramework();
+  if (f.HasUnsavedEdits(countryId))
+  {
+    [alertController presentUnsavedEditsAlertWithOkBlock:^
+    {
+       f.Storage().DeleteNode(countryId);
+    }];
+  }
+  else
+  {
+    f.Storage().DeleteNode(countryId);
+  }
 }
 
 + (void)cancelDownloadNode:(storage::TCountryId const &)countryId