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#include <mbgl/style/tile_source_impl.hpp>
#include <mbgl/style/source_observer.hpp>
#include <mbgl/style/conversion/json.hpp>
#include <mbgl/style/conversion/tileset.hpp>
#include <mbgl/util/mapbox.hpp>
#include <mbgl/storage/file_source.hpp>
namespace mbgl {
namespace style {
TileSourceImpl::TileSourceImpl(SourceType type_, std::string id_, Source& base_,
variant<std::string, Tileset> urlOrTileset_,
uint16_t tileSize_)
: Impl(type_, std::move(id_), base_),
urlOrTileset(std::move(urlOrTileset_)),
tileSize(tileSize_) {
}
TileSourceImpl::~TileSourceImpl() = default;
void TileSourceImpl::loadDescription(FileSource& fileSource) {
if (urlOrTileset.is<Tileset>()) {
tileset = urlOrTileset.get<Tileset>();
loaded = true;
return;
}
if (req) {
return;
}
const std::string& url = urlOrTileset.get<std::string>();
req = fileSource.request(Resource::source(url), [this, url](Response res) {
if (res.error) {
observer->onSourceError(base, std::make_exception_ptr(std::runtime_error(res.error->message)));
} else if (res.notModified) {
return;
} else if (res.noContent) {
observer->onSourceError(base, std::make_exception_ptr(std::runtime_error("unexpectedly empty TileJSON")));
} else {
conversion::Error error;
optional<Tileset> newTileset = conversion::convertJSON<Tileset>(*res.data, error);
if (!newTileset) {
observer->onSourceError(base, std::make_exception_ptr(std::runtime_error(error.message)));
return;
}
util::mapbox::canonicalizeTileset(*newTileset, url, type, tileSize);
bool attributionChanged = tileset.attribution != (*newTileset).attribution;
tileset = *newTileset;
loaded = true;
observer->onSourceLoaded(base);
if (attributionChanged) {
observer->onSourceChanged(base);
}
}
});
}
optional<Tileset> TileSourceImpl::getTileset() const {
if (loaded) {
return tileset;
}
return {};
}
optional<std::string> TileSourceImpl::getAttribution() const {
if (loaded && !tileset.attribution.empty()) {
return tileset.attribution;
} else {
return {};
}
}
} // namespace style
} // namespace mbgl
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