plugin_handler.h

/******************************************************************************
 *
 * Project:  OpenCPN
 *
 ***************************************************************************
 *   Copyright (C) 2019 Alec Leamas                                        *
 *                                                                         *
 *   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     *
 *   (at your option) 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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
 ***************************************************************************
 */
 
#ifndef PLUGIN_HANDLER_H__
#define PLUGIN_HANDLER_H__
 
#include "config.h"
 
#include <string>
#include <map>
#include <memory>
#include <vector>
 
#include <wx/cmdline.h>
 
#include <archive.h>
 
#include "catalog_parser.h"
#include "observable_evtvar.h"
 
bool isRegularFile(const char* path);
 
class CompatOs {
public:
  static CompatOs* getInstance();
  std::string name() const { return _name; }
  std::string version() const { return _version; }
 
private:
  CompatOs();
  std::string _name;
  std::string _version;
};
 
class PluginHandler {
public:
 
  EventVar evt_download_ok;
  EventVar evt_download_failed;
 
  static PluginHandler* getInstance();
 
  static void cleanup(const std::string& filelist, const std::string& plugname);
  static void cleanupFiles(const std::string& manifestFile,
                           const std::string& plugname);
 
  static std::string fileListPath(std::string name);
 
  static std::string versionPath(std::string name);
 
  static bool isCompatible(const PluginMetadata& metadata,
                           const char* os = PKG_TARGET,
                           const char* os_version = PKG_TARGET_VERSION);
 
  bool isPluginWritable(std::string name);
 
  const std::vector<PluginMetadata> getInstalled();
 
  const std::vector<PluginMetadata> getAvailable();
 
  const std::map<std::string, int> getCountByTarget();
 
  std::string getMetadataPath();
 
  void setMetadata(std::string path) { metadataPath = path; }
 
  bool installPlugin(PluginMetadata plugin);
 
  bool installPlugin(PluginMetadata plugin, std::string path);
 
  bool installPlugin(std::string path);
 
  bool uninstall(const std::string plugin);
 
  bool installPluginFromCache(PluginMetadata plugin);
 
  std::string getLastErrorMsg() { return last_error_msg; }
 
  CatalogData* GetCatalogData() { return &catalogData; }
 
protected:
  PluginHandler();
 
private:
  std::string metadataPath;
  std::vector<PluginMetadata> installed;
  CatalogData catalogData;
  std::string last_error_msg;
  bool explodeTarball(struct archive* src, struct archive* dest,
                      std::string& filelist,
                      const std::string& metadata_path);
  bool extractTarball(const std::string path, std::string& filelist,
                      const std::string metadata_path = "");
  bool archive_check(int r, const char* msg, struct archive* a);
};
 
#endif  // PLUGIN_HANDLER_H__