cache.hpp

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#pragma once
#ifndef CACHE_HPP
#define CACHE_HPP

#include "settings.hpp"

#include <boost/thread/mutex.hpp>
#include <boost/unordered_map.hpp>
#include <boost/filesystem.hpp>
#include <list>

#include "server/tile_identifier.hpp"
#include "server/tile.hpp"

class Configuration;
class Stylesheet;

class Cache
{
public:
  
    typedef std::list<shared_ptr<Tile>> TileList;
    
    typedef std::pair<shared_ptr<Tile>, TileList::iterator> CacheElement;
    
    typedef boost::unordered_map<TileIdentifier, CacheElement> CacheOfOneStylesheet;
    
    typedef boost::unordered_map<string, shared_ptr<CacheOfOneStylesheet> > CacheContainer;
    
    
    Cache(const shared_ptr<Configuration>& config);
    
    TESTABLE shared_ptr<Tile> getTile(const shared_ptr<TileIdentifier>& tl);
    TESTABLE shared_ptr<Tile> getDefaultTile();
    TESTABLE void deleteTiles(const string path);

private:
    shared_ptr<Configuration> Config;
    boost::mutex GlobalCacheLock;
    CacheContainer AllCaches;
    TileList RecentlyUsedList;
    shared_ptr<Tile> DefaultTile;
    void readFile(const Tile::ImageType& image, const boost::filesystem::path& filename);
    void writeFile(shared_ptr<Tile> tile, const boost::filesystem::path& filename);
    const boost::filesystem::path getTilePath(const shared_ptr<TileIdentifier>& ti);
};

#endif