[ios] Fixed category search for unsupported translations.

Signed-off-by: Kiryl Kaveryn <kirylkaveryn@gmail.com>

iphone/CoreApi/CoreApi/Search/MWMSearchFrameworkHelper.h

@@ -7,6 +7,7 @@ NS_ASSUME_NONNULL_BEGIN
 + (NSArray<NSString *> *)searchCategories;
 
 + (BOOL)isSearchHistoryEmpty;
++ (BOOL)isLanguageSupported:(NSString *)languageCode;
 + (NSArray<NSString *> *)lastSearchQueries;
 + (void)clearSearchHistory;
 

iphone/CoreApi/CoreApi/Search/MWMSearchFrameworkHelper.mm

@@ -1,6 +1,7 @@
 #import "MWMSearchFrameworkHelper.h"
 
 #include "platform/preferred_languages.hpp"
+#include "search/displayed_categories.hpp"
 
 #include "Framework.h"
 
@@ -20,6 +21,11 @@
   return GetFramework().GetSearchAPI().GetLastSearchQueries().empty();
 }
 
++ (BOOL)isLanguageSupported:(NSString *)languageCode
+{
+  return search::DisplayedCategories::IsLanguageSupported(languageCode.UTF8String);
+}
+
 + (NSArray<NSString *> *)lastSearchQueries
 {
   NSMutableArray * result = [NSMutableArray array];

iphone/Maps/Common/Common.swift

@@ -9,6 +9,15 @@ var isiPad: Bool {
 
 func L(_ key: String) -> String { return NSLocalizedString(key, comment: "") }
 
+func L(_ key: String, languageCode: String) -> String {
+  guard let path = Bundle.main.path(forResource: languageCode, ofType: "lproj"),
+        let bundle = Bundle(path: path) else {
+    LOG(.warning, "Localization bundle not found for language code: \(languageCode)")
+    return L(key)
+  }
+  return NSLocalizedString(key, bundle: bundle, comment: "")
+}
+
 func alternative<T>(iPhone: T, iPad: T) -> T { isiPad ? iPad : iPhone }
 
 func iPadSpecific(_ f: () -> Void) {

iphone/Maps/UI/Search/Tabs/SearchTabViewController.swift

@@ -70,7 +70,10 @@ extension SearchTabViewController: SearchOnMapScrollViewDelegate {
 extension SearchTabViewController: SearchCategoriesViewControllerDelegate {
   func categoriesViewController(_ viewController: SearchCategoriesViewController,
                                 didSelect category: String) {
-    let query = SearchQuery(L(category) + " ", source: .category)
+    let preferredLang = AppInfo.shared().languageId
+    let supportedBySearchLang = MWMSearchFrameworkHelper.isLanguageSupported(preferredLang) ? preferredLang : "en"
+    let searchText = L(category, languageCode: supportedBySearchLang) + " "
+    let query = SearchQuery(searchText, locale: supportedBySearchLang, source: .category)
     delegate?.searchTabController(self, didSearch: query)
   }
 }