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/*
* The Mana Client
* Copyright (C) 2004-2009 The Mana World Development Team
* Copyright (C) 2009-2012 The Mana Developers
*
* This file is part of The Mana Client.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef RESOURCE_MANAGER_H
#define RESOURCE_MANAGER_H
#include <ctime>
#include <functional>
#include <map>
#include <string>
#include <vector>
class Image;
class ImageSet;
class Music;
class Resource;
class SoundEffect;
class SpriteDef;
struct SDL_RWops;
/**
* A class for loading and managing resources.
*/
class ResourceManager
{
friend class Resource;
public:
using loader = Resource *(*)(SDL_RWops *);
ResourceManager();
/**
* Destructor. Cleans up remaining resources, warning about resources
* that were still referenced.
*/
~ResourceManager();
/**
* Sets the write directory.
*
* @param path The path of the directory to be added.
* @return <code>true</code> on success, <code>false</code> otherwise.
*/
bool setWriteDir(const std::string &path);
/**
* Adds a directory or archive to the search path. If append is true
* then the directory is added to the end of the search path, otherwise
* it is added at the front.
*
* @return <code>true</code> on success, <code>false</code> otherwise.
*/
bool addToSearchPath(const std::string &path, bool append);
/**
* Searches for zip files and adds them to the search path.
*/
void searchAndAddArchives(const std::string &path,
const std::string &ext,
bool append);
/**
* Creates a directory in the write path
*/
bool mkdir(const std::string &path);
/**
* Checks whether the given file or directory exists in the search path
*/
bool exists(const std::string &path);
/**
* Checks whether the given path is a directory.
*/
bool isDirectory(const std::string &path);
/**
* Returns the real path to a file. Note that this method will always
* return a path, it does not check whether the file exists.
*
* @param file The file to get the real path to.
* @return The real path.
*/
std::string getPath(const std::string &file);
/**
* Opens a file for reading. The caller is responsible for closing the
* file.
*
* @param path The file name.
* @return A valid SDL_RWops pointer or <code>NULL</code> if the file
* could not be opened.
*/
SDL_RWops *open(const std::string &path);
/**
* Creates a resource and adds it to the resource map.
*
* @param idPath The resource identifier path.
* @param fun A function for generating the resource.
* @param data Extra parameters for the generator.
* @return A valid resource or <code>NULL</code> if the resource could
* not be generated.
*/
Resource *get(const std::string &idPath,
const std::function<Resource *()> &generator);
/**
* Loads a resource from a file and adds it to the resource map.
*
* @param path The file name.
* @param fun A function for parsing the file.
* @return A valid resource or <code>NULL</code> if the resource could
* not be loaded.
*/
Resource *get(const std::string &path, loader fun);
/**
* Convenience wrapper around ResourceManager::get for loading
* images.
*/
Image *getImage(const std::string &idPath);
/**
* Convenience wrapper around ResourceManager::get for loading
* songs.
*/
Music *getMusic(const std::string &idPath);
/**
* Convenience wrapper around ResourceManager::get for loading
* samples.
*/
SoundEffect *getSoundEffect(const std::string &idPath);
/**
* Creates a image set based on the image referenced by the given
* path and the supplied sprite sizes
*/
ImageSet *getImageSet(const std::string &imagePath, int w, int h);
/**
* Creates a sprite definition based on a given path and the supplied
* variant.
*/
SpriteDef *getSprite(const std::string &path, int variant = 0);
/**
* Allocates data into a buffer pointer for raw data loading. The
* returned data is expected to be freed using <code>free()</code>.
*
* @param filename The name of the file to be loaded.
* @param filesize The size of the file that was loaded.
* @param inflate True to uncompress the file if the filename ends in
* ".gz", false to ignore that.
*
* @return An allocated byte array containing the data that was loaded,
* or <code>NULL</code> on fail.
*/
void *loadFile(const std::string &filename, int &filesize,
bool inflate = true);
/**
* Copies a file from one place to another (useful for extracting
* raw files from a zip archive, for example)
*
* @param src Source file name
* @param dst Destination file name
* @return true on success, false on failure. An error message should be
* in the log file.
*/
bool copyFile(const std::string &src, const std::string &dst);
/**
* Retrieves the contents of a text file.
*/
std::vector<std::string> loadTextFile(const std::string &fileName);
/**
* Returns an instance of the class, creating one if it does not
* already exist.
*/
static ResourceManager *getInstance();
/**
* Deletes the class instance if it exists.
*/
static void deleteInstance();
private:
/**
* Releases a resource, placing it in the set of orphaned resources.
* Only called from Resource::decRef,
*/
void release(Resource *);
/**
* Removes a resource from the list of resources managed by the
* resource manager. Only called from Resource::decRef,
*/
void remove(Resource *);
/**
* Deletes the resource after logging a cleanup message.
*/
static void cleanUp(Resource *resource);
void cleanOrphans();
static ResourceManager *instance;
std::map<std::string, Resource *> mResources;
std::map<std::string, Resource *> mOrphanedResources;
time_t mOldestOrphan;
};
#endif
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