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#import "MGLOfflineTask_Private.h"
#import "MGLOfflineStorage_Private.h"
#import "MGLOfflineRegion_Private.h"
#import "MGLTilePyramidOfflineRegion.h"
#include <mbgl/storage/default_file_source.hpp>
#include <mbgl/util/string.hpp>
#define MGLAssertOfflineTaskIsValid() \
[NSException raise:@"Invalid offline task" \
format: \
@"-[MGLOfflineStorage removeTask:withCompletionHandler:] has been called " \
@"on this instance of MGLOfflineTask, rendering it invalid. It is an " \
@"error to send any message to this task."]
class MBGLOfflineRegionObserver;
@interface MGLOfflineTask ()
@property (nonatomic, readwrite) mbgl::OfflineRegion *mbglOfflineRegion;
@property (nonatomic, readwrite) MBGLOfflineRegionObserver *mbglOfflineRegionObserver;
@property (nonatomic, readwrite) MGLOfflineTaskState state;
@property (nonatomic, readwrite) MGLOfflineTaskProgress progress;
@end
@implementation MGLOfflineTask
- (instancetype)init {
[NSException raise:@"Method unavailable"
format:
@"-[MGLOfflineTask init] is unavailable. "
@"Use +[MGLOfflineStorage addTaskForRegion:withContext:completionHandler:] instead."];
return nil;
}
- (instancetype)initWithMBGLRegion:(mbgl::OfflineRegion *)region {
if (self = [super init]) {
_mbglOfflineRegion = region;
_state = MGLOfflineTaskStateInactive;
_mbglOfflineRegionObserver = new MBGLOfflineRegionObserver(self);
mbgl::DefaultFileSource *mbglFileSource = [[MGLOfflineStorage sharedOfflineStorage] mbglFileSource];
mbglFileSource->setOfflineRegionObserver(*_mbglOfflineRegion, std::make_unique<MBGLOfflineRegionObserver>(*_mbglOfflineRegionObserver));
}
return self;
}
- (void)dealloc {
delete _mbglOfflineRegionObserver;
_mbglOfflineRegionObserver = nullptr;
}
- (id <MGLOfflineRegion>)region {
MGLAssertOfflineTaskIsValid();
const mbgl::OfflineRegionDefinition ®ionDefinition = _mbglOfflineRegion->getDefinition();
NSAssert([MGLTilePyramidOfflineRegion conformsToProtocol:@protocol(MGLOfflineRegion_Private)], @"MGLTilePyramidOfflineRegion should conform to MGLOfflineRegion_Private.");
return [(id <MGLOfflineRegion_Private>)[MGLTilePyramidOfflineRegion alloc] initWithOfflineRegionDefinition:regionDefinition];
}
- (NSData *)context {
MGLAssertOfflineTaskIsValid();
const mbgl::OfflineRegionMetadata &metadata = _mbglOfflineRegion->getMetadata();
return [NSData dataWithBytes:&metadata[0] length:metadata.size()];
}
- (void)resume {
MGLAssertOfflineTaskIsValid();
mbgl::DefaultFileSource *mbglFileSource = [[MGLOfflineStorage sharedOfflineStorage] mbglFileSource];
mbglFileSource->setOfflineRegionDownloadState(*_mbglOfflineRegion, mbgl::OfflineRegionDownloadState::Active);
self.state = MGLOfflineTaskStateActive;
}
- (void)suspend {
MGLAssertOfflineTaskIsValid();
mbgl::DefaultFileSource *mbglFileSource = [[MGLOfflineStorage sharedOfflineStorage] mbglFileSource];
mbglFileSource->setOfflineRegionDownloadState(*_mbglOfflineRegion, mbgl::OfflineRegionDownloadState::Inactive);
self.state = MGLOfflineTaskStateInactive;
}
- (void)invalidate {
MGLAssertOfflineTaskIsValid();
self.state = MGLOfflineTaskStateInvalid;
}
- (void)requestProgress {
MGLAssertOfflineTaskIsValid();
mbgl::DefaultFileSource *mbglFileSource = [[MGLOfflineStorage sharedOfflineStorage] mbglFileSource];
__weak MGLOfflineTask *weakSelf = self;
mbglFileSource->getOfflineRegionStatus(*_mbglOfflineRegion, [&, weakSelf](__unused std::exception_ptr exception, mbgl::optional<mbgl::OfflineRegionStatus> status) {
if (status) {
mbgl::OfflineRegionStatus checkedStatus = *status;
dispatch_async(dispatch_get_main_queue(), ^{
MGLOfflineTask *strongSelf = weakSelf;
[strongSelf offlineRegionStatusDidChange:checkedStatus];
});
}
});
}
- (void)offlineRegionStatusDidChange:(mbgl::OfflineRegionStatus)status {
MGLAssertOfflineTaskIsValid();
switch (status.downloadState) {
case mbgl::OfflineRegionDownloadState::Inactive:
self.state = status.complete() ? MGLOfflineTaskStateComplete : MGLOfflineTaskStateInactive;
break;
case mbgl::OfflineRegionDownloadState::Active:
self.state = MGLOfflineTaskStateActive;
break;
}
MGLOfflineTaskProgress progress;
progress.countOfResourcesCompleted = status.completedResourceCount;
progress.countOfBytesCompleted = status.completedResourceSize;
progress.countOfResourcesExpected = status.requiredResourceCount;
progress.maximumResourcesExpected = status.requiredResourceCountIsPrecise ? status.requiredResourceCount : UINT64_MAX;
self.progress = progress;
if ([self.delegate respondsToSelector:@selector(offlineTask:progressDidChange:)]) {
[self.delegate offlineTask:self progressDidChange:progress];
}
}
NSError *MGLErrorFromResponseError(mbgl::Response::Error error) {
NSInteger errorCode = MGLErrorCodeUnknown;
switch (error.reason) {
case mbgl::Response::Error::Reason::NotFound:
errorCode = MGLErrorCodeNotFound;
break;
case mbgl::Response::Error::Reason::Server:
errorCode = MGLErrorCodeBadServerResponse;
break;
case mbgl::Response::Error::Reason::Connection:
errorCode = MGLErrorCodeConnectionFailed;
break;
default:
break;
}
return [NSError errorWithDomain:MGLErrorDomain code:errorCode userInfo:@{
NSLocalizedFailureReasonErrorKey: @(error.message.c_str())
}];
}
void MBGLOfflineRegionObserver::statusChanged(mbgl::OfflineRegionStatus status) {
dispatch_async(dispatch_get_main_queue(), ^{
NSCAssert(offlineTask, @"MBGLOfflineRegionObserver is dangling without an associated MGLOfflineTask.");
[offlineTask offlineRegionStatusDidChange:status];
});
}
void MBGLOfflineRegionObserver::responseError(mbgl::Response::Error error) {
dispatch_async(dispatch_get_main_queue(), ^{
NSCAssert(offlineTask, @"MBGLOfflineRegionObserver is dangling without an associated MGLOfflineTask.");
if ([offlineTask.delegate respondsToSelector:@selector(offlineTask:didReceiveError:)]) {
[offlineTask.delegate offlineTask:offlineTask didReceiveError:MGLErrorFromResponseError(error)];
}
});
}
void MBGLOfflineRegionObserver::mapboxTileCountLimitExceeded(uint64_t limit) {
dispatch_async(dispatch_get_main_queue(), ^{
NSCAssert(offlineTask, @"MBGLOfflineRegionObserver is dangling without an associated MGLOfflineTask.");
if ([offlineTask.delegate respondsToSelector:@selector(offlineTask:didReceiveMaximumAllowedMapboxTiles:)]) {
[offlineTask.delegate offlineTask:offlineTask didReceiveMaximumAllowedMapboxTiles:limit];
}
});
}
@end
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