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#import "MGLVectorSource+MGLAdditions.h"
@implementation MGLVectorSource (MGLAdditions)
+ (NS_SET_OF(NSString *) *)mapboxStreetsLanguages {
// https://www.mapbox.com/vector-tiles/mapbox-streets-v7/#overview
static dispatch_once_t onceToken;
static NS_SET_OF(NSString *) *mapboxStreetsLanguages;
dispatch_once(&onceToken, ^{
// https://www.mapbox.com/vector-tiles/mapbox-streets-v7/#overview
mapboxStreetsLanguages = [NSSet setWithObjects:@"ar", @"de", @"en", @"es", @"fr", @"pt", @"ru", @"zh", @"zh-Hans", nil];
});
return mapboxStreetsLanguages;
}
+ (NSString *)preferredMapboxStreetsLanguage {
NSArray<NSString *> *supportedLanguages = [MGLVectorSource mapboxStreetsLanguages].allObjects;
NSArray<NSString *> *preferredLanguages = [NSBundle preferredLocalizationsFromArray:supportedLanguages
forPreferences:[NSLocale preferredLanguages]];
NSString *mostSpecificLanguage;
for (NSString *language in preferredLanguages) {
if (language.length > mostSpecificLanguage.length) {
mostSpecificLanguage = language;
}
}
return mostSpecificLanguage ?: @"en";
}
- (BOOL)isMapboxStreets {
NSURL *url = self.configurationURL;
if (![url.scheme isEqualToString:@"mapbox"]) {
return NO;
}
NSArray *identifiers = [url.host componentsSeparatedByString:@","];
return [identifiers containsObject:@"mapbox.mapbox-streets-v7"] || [identifiers containsObject:@"mapbox.mapbox-streets-v6"];
}
- (NS_DICTIONARY_OF(NSString *, NSString *) *)localizedKeysByKeyForPreferredLanguage:(nullable NSString *)preferredLanguage {
if (!self.mapboxStreets) {
return @{};
}
// Replace {name} and {name_*} with the matching localized name tag.
NSString *localizedKey = preferredLanguage ? [NSString stringWithFormat:@"name_%@", preferredLanguage] : @"name";
NSMutableDictionary *localizedKeysByKey = [NSMutableDictionary dictionaryWithObject:localizedKey forKey:@"name"];
for (NSString *languageCode in [MGLVectorSource mapboxStreetsLanguages]) {
NSString *key = [NSString stringWithFormat:@"name_%@", languageCode];
localizedKeysByKey[key] = localizedKey;
}
return localizedKeysByKey;
}
@end
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