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#include <mbgl/util/run_loop.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/util/io.hpp>
#include <mbgl/storage/default_file_source.hpp>
#include <cstdlib>
#include <iostream>
using namespace std::literals::chrono_literals;
int main(int, char * []) {
using namespace mbgl;
unlink("offline.db");
util::RunLoop loop;
DefaultFileSource fileSource("offline.db", ".");
fileSource.setAccessToken(getenv("MAPBOX_ACCESS_TOKEN"));
LatLngBounds bayArea = LatLngBounds::hull(LatLng(37.2, -122.8), LatLng(38.1, -121.7));
OfflineTilePyramidRegionDefinition definition("mapbox://styles/mapbox/streets-v8", bayArea, 0, 15, 1.0);
OfflineRegionMetadata metadata;
class Observer : public OfflineRegionObserver {
public:
Observer(util::RunLoop& loop_)
: loop(loop_),
start(SystemClock::now()) {
}
void statusChanged(OfflineRegionStatus status) override {
std::string bytesPerSecond = "-";
auto elapsedSeconds = (SystemClock::now() - start) / 1s;
if (elapsedSeconds != 0) {
bytesPerSecond = util::toString(status.completedResourceSize / elapsedSeconds);
}
std::cout << status.completedResourceCount << " / " << status.requiredResourceCount
<< " resources"
<< (status.requiredResourceCountIsIndeterminate ? " (indeterminate); " : "; ")
<< status.completedResourceSize << " bytes downloaded"
<< " (" << bytesPerSecond << " bytes/sec)"
<< std::endl;
if (status.complete()) {
std::cout << "Finished" << std::endl;
loop.stop();
}
}
void responseError(Response::Error error) override {
std::cerr << error.reason << " downloading resource: " << error.message << std::endl;
}
util::RunLoop& loop;
SystemTimePoint start;
};
fileSource.createOfflineRegion(definition, metadata, [&] (std::exception_ptr error, optional<OfflineRegion> region) {
if (error) {
std::cerr << "Error creating region: " << util::toString(error) << std::endl;
loop.stop();
exit(1);
} else {
assert(region);
fileSource.setOfflineRegionObserver(*region, std::make_unique<Observer>(loop));
fileSource.setOfflineRegionDownloadState(*region, OfflineRegionDownloadState::Active);
}
});
loop.run();
return 0;
}
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