diff options
Diffstat (limited to 'platform/default/include/mbgl/storage/offline_download.hpp')
-rw-r--r-- | platform/default/include/mbgl/storage/offline_download.hpp | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/platform/default/include/mbgl/storage/offline_download.hpp b/platform/default/include/mbgl/storage/offline_download.hpp new file mode 100644 index 0000000000..1e77ff1d35 --- /dev/null +++ b/platform/default/include/mbgl/storage/offline_download.hpp @@ -0,0 +1,69 @@ +#pragma once + +#include <mbgl/storage/offline.hpp> +#include <mbgl/storage/resource.hpp> +#include <mbgl/storage/online_file_source.hpp> + +#include <list> +#include <unordered_set> +#include <memory> +#include <deque> + +namespace mbgl { + +class OfflineDatabase; +class FileSource; +class AsyncRequest; +class Response; +class Tileset; + +namespace style { +class Parser; +} // namespace style + +/** + * Coordinates the request and storage of all resources for an offline region. + + * @private + */ +class OfflineDownload { +public: + OfflineDownload(int64_t id, OfflineRegionDefinition&&, OfflineDatabase& offline, OnlineFileSource& online); + ~OfflineDownload(); + + void setObserver(std::unique_ptr<OfflineRegionObserver>); + void setState(OfflineRegionDownloadState); + + OfflineRegionStatus getStatus() const; + +private: + void activateDownload(); + void continueDownload(); + void deactivateDownload(); + + /* + * Ensure that the resource is stored in the database, requesting it if necessary. + * While the request is in progress, it is recorded in `requests`. If the download + * is deactivated, all in progress requests are cancelled. + */ + void ensureResource(const Resource&, std::function<void (Response)> = {}); + + void onMapboxTileCountLimitExceeded(); + + int64_t id; + OfflineRegionDefinition definition; + OfflineDatabase& offlineDatabase; + OnlineFileSource& onlineFileSource; + OfflineRegionStatus status; + std::unique_ptr<OfflineRegionObserver> observer; + + std::list<std::unique_ptr<AsyncRequest>> requests; + std::unordered_set<std::string> requiredSourceURLs; + std::deque<Resource> resourcesRemaining; + std::list<std::tuple<Resource, Response>> buffer; + + void queueResource(Resource); + void queueTiles(style::SourceType, uint16_t tileSize, const Tileset&); +}; + +} // namespace mbgl |