module_manager.hpp

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/*
    Copyright (C) 2014-2016 Leosac

    This file is part of Leosac.

    Leosac is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Leosac 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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

#pragma once

#include "LeosacFwd.hpp"
#include "boost/property_tree/ptree.hpp"
#include "core/config/ConfigManager.hpp"
#include "dynlib/dynamiclibrary.hpp"
#include <list>
#include <map>
#include <set>
#include <string>
#include <vector>
#include <zmqpp/actor.hpp>

namespace Leosac
{
class ConfigManager;
}

class ModuleManager
{
  public:
    ModuleManager(zmqpp::context &ctx, Leosac::Kernel &k);

    ~ModuleManager();


    struct ModuleInfo
    {
        ~ModuleInfo();
        ModuleInfo(const Leosac::ConfigManager &cfg);

        ModuleInfo(const ModuleInfo &) = delete;
        ModuleInfo &operator=(const ModuleInfo &) = delete;

        ModuleInfo(ModuleInfo &&o);

        ModuleInfo &operator=(ModuleInfo &&) = delete;

        std::string name_;

        mutable std::shared_ptr<DynamicLibrary> lib_;

        mutable std::unique_ptr<zmqpp::actor> actor_;

        bool operator<(const ModuleInfo &o) const;

      private:
        const Leosac::ConfigManager &cfg_;
    };

    void initModules();

    bool initModule(const std::string &name);

    void initModule(ModuleInfo *modinfo);

    void stopModules(bool soft = false);

    void addToPath(const std::string &dir);

    bool loadModule(const std::string &module_name);

    std::vector<std::string> modules_names() const;

    bool has_module(const std::string &name) const;

    const std::vector<std::string> &get_module_path() const;

  private:
    void unloadLibraries();

    bool stopModule(const std::string &name);

    void stopModule(ModuleInfo *modinfo, bool soft = false);


    ModuleInfo *find_module_by_name(const std::string &name) const;

    std::shared_ptr<DynamicLibrary> load_library_file(const std::string &full_path);

    std::vector<std::string> path_;
    std::set<ModuleInfo> modules_;

    zmqpp::context &ctx_;
    Leosac::ConfigManager &config_manager_;
    Leosac::CoreUtilsPtr core_utils_;
};