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#pragma once
#include "db.h"
#include <unordered_map>
#include <utility>
#include <leveldb/db.h>
class DBLevelDB : public DB {
public:
DBLevelDB(const std::string &mapdir);
std::vector<BlockPos> getBlockPos(BlockPos min, BlockPos max) override;
void getBlocksOnXZ(BlockList &blocks, int16_t x, int16_t z,
int16_t min_y, int16_t max_y) override;
void getBlocksByPos(BlockList &blocks,
const std::vector<BlockPos> &positions) override;
~DBLevelDB() override;
bool preferRangeQueries() const override { return false; }
private:
using pos2d = std::pair<int16_t, int16_t>;
void loadPosCache();
// indexed by Z, contains all (x,y) position pairs
std::unordered_map<int16_t, std::vector<pos2d>> posCache;
leveldb::DB *db;
};
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