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#import "MGLDownloadController_Private.h"
#import "MGLAccountManager_Private.h"
#import "MGLGeometry_Private.h"
#import "MGLDownloadable_Private.h"
#import "MGLDownloadRegion_Private.h"
#import "MGLTilePyramidDownloadRegion.h"
#include <mbgl/util/string.hpp>
@interface MGLDownloadController ()
@property (nonatomic) mbgl::DefaultFileSource *mbglFileSource;
- (instancetype)initWithFileName:(NSString *)fileName NS_DESIGNATED_INITIALIZER;
@end
@implementation MGLDownloadController
+ (instancetype)sharedController {
static dispatch_once_t onceToken;
static MGLDownloadController *sharedController;
dispatch_once(&onceToken, ^{
sharedController = [[self alloc] initWithFileName:@"offline.db"];
});
return sharedController;
}
- (instancetype)initWithFileName:(NSString *)fileName {
if (self = [super init]) {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *fileCachePath = [paths.firstObject stringByAppendingPathComponent:fileName];
_mbglFileSource = new mbgl::DefaultFileSource(fileCachePath.UTF8String, [NSBundle mainBundle].resourceURL.path.UTF8String);
// Observe for changes to the global access token (and find out the current one).
[[MGLAccountManager sharedManager] addObserver:self
forKeyPath:@"accessToken"
options:(NSKeyValueObservingOptionInitial |
NSKeyValueObservingOptionNew)
context:NULL];
}
return self;
}
- (void)dealloc {
[[MGLAccountManager sharedManager] removeObserver:self forKeyPath:@"accessToken"];
delete _mbglFileSource;
_mbglFileSource = nullptr;
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NS_DICTIONARY_OF(NSString *, id) *)change context:(__unused void *)context {
// Synchronize the file source’s access token with the global one in MGLAccountManager.
if ([keyPath isEqualToString:@"accessToken"] && object == [MGLAccountManager sharedManager]) {
NSString *accessToken = change[NSKeyValueChangeNewKey];
if (![accessToken isKindOfClass:[NSNull class]]) {
self.mbglFileSource->setAccessToken(accessToken.UTF8String);
}
}
}
- (void)addDownloadableForRegion:(id <MGLDownloadRegion>)downloadRegion withContext:(NSData *)context completionHandler:(MGLDownloadableRegistrationCompletionHandler)completion {
if (![downloadRegion conformsToProtocol:@protocol(MGLDownloadRegion_Private)]) {
[NSException raise:@"Unsupported region type" format:
@"Regions of type %@ are unsupported.", NSStringFromClass([downloadRegion class])];
return;
}
const mbgl::OfflineTilePyramidRegionDefinition regionDefinition = [(id <MGLDownloadRegion_Private>)downloadRegion offlineRegionDefinition];
mbgl::OfflineRegionMetadata metadata(context.length);
[context getBytes:&metadata[0] length:metadata.size()];
self.mbglFileSource->createOfflineRegion(regionDefinition, metadata, [&, completion](std::exception_ptr exception, mbgl::optional<mbgl::OfflineRegion> region) {
NSError *error;
if (exception) {
NSString *errorDescription = @(mbgl::util::toString(exception).c_str());
error = [NSError errorWithDomain:MGLErrorDomain code:-1 userInfo:errorDescription ? @{
NSLocalizedDescriptionKey: errorDescription,
} : nil];
}
if (completion) {
MGLDownloadable *downloadable = [[MGLDownloadable alloc] initWithMBGLRegion:new mbgl::OfflineRegion(std::move(*region))];
dispatch_async(dispatch_get_main_queue(), [&, completion, error, downloadable](void) {
completion(downloadable, error);
});
}
});
}
- (void)removeDownloadable:(MGLDownloadable *)downloadable withCompletionHandler:(MGLDownloadableRemovalCompletionHandler)completion {
self.mbglFileSource->deleteOfflineRegion(std::move(*downloadable.mbglOfflineRegion), [&, completion](std::exception_ptr exception) {
NSError *error;
if (exception) {
error = [NSError errorWithDomain:MGLErrorDomain code:-1 userInfo:@{
NSLocalizedDescriptionKey: @(mbgl::util::toString(exception).c_str()),
}];
}
if (completion) {
dispatch_async(dispatch_get_main_queue(), [&, completion, error](void) {
completion(error);
});
}
});
}
- (void)requestDownloadablesWithCompletionHandler:(MGLDownloadablesRequestCompletionHandler)completion {
self.mbglFileSource->listOfflineRegions([&, completion](std::exception_ptr exception, mbgl::optional<std::vector<mbgl::OfflineRegion>> regions) {
NSError *error;
if (exception) {
error = [NSError errorWithDomain:MGLErrorDomain code:-1 userInfo:@{
NSLocalizedDescriptionKey: @(mbgl::util::toString(exception).c_str()),
}];
}
NSMutableArray *downloadables;
if (regions) {
downloadables = [NSMutableArray arrayWithCapacity:regions->size()];
for (mbgl::OfflineRegion ®ion : *regions) {
MGLDownloadable *downloadable = [[MGLDownloadable alloc] initWithMBGLRegion:new mbgl::OfflineRegion(std::move(region))];
[downloadables addObject:downloadable];
}
}
if (completion) {
dispatch_async(dispatch_get_main_queue(), [&, completion, error, downloadables](void) {
completion(downloadables, error);
});
}
});
}
- (void)setMaximumAllowedMapboxTiles:(uint64_t)maximumCount {
_mbglFileSource->setOfflineMapboxTileCountLimit(maximumCount);
}
@end
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