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/*! \file */
#ifndef _MBTILES_H
#define _MBTILES_H
#include <string>
#include <mutex>
#include <vector>
#include "external/sqlite_modern_cpp.h"
struct PendingStatement {
int zoom;
int x;
int y;
std::string data;
bool isMerge;
};
/** \brief Write to MBTiles (sqlite) database
*
* (note that sqlite_modern_cpp.h is very slightly changed from the original, for blob support and an .init method)
*/
class MBTiles {
sqlite::database db;
std::vector<sqlite::database_binder> preparedStatements;
std::mutex m;
bool inTransaction;
std::shared_ptr<std::vector<PendingStatement>> pendingStatements1, pendingStatements2;
std::mutex pendingStatementsMutex;
void insertOrReplace(int zoom, int x, int y, const std::string& data, bool isMerge);
void flushPendingStatements();
public:
MBTiles();
virtual ~MBTiles();
void openForWriting(std::string &filename);
void writeMetadata(std::string key, std::string value);
void saveTile(int zoom, int x, int y, std::string *data, bool isMerge);
void closeForWriting();
void openForReading(std::string &filename);
void readBoundingBox(double &minLon, double &maxLon, double &minLat, double &maxLat);
void readTileList(std::vector<std::tuple<int,int,int>> &tileList);
std::vector<char> readTile(int zoom, int col, int row);
bool readTileAndUncompress(std::string &data, int zoom, int col, int row, bool isCompressed, bool asGzip);
};
#endif //_MBTILES_H
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