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#pragma once
#include <mbgl/storage/offline.hpp>
#include <mbgl/storage/resource.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, FileSource& 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)> = {});
bool checkTileCountLimit(const Resource& resource);
int64_t id;
OfflineRegionDefinition definition;
OfflineDatabase& offlineDatabase;
FileSource& 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;
void queueResource(Resource);
void queueTiles(SourceType, uint16_t tileSize, const Tileset&);
};
} // namespace mbgl
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