TrayIcon.hpp

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/*
 * BastionGuard™
 * Copyright (C) 2025–2026 Calogero Scarnà
 *
 * 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, version 3.
 *
 * 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 <https://www.gnu.org/licenses/>.
 *
 * BastionGuard™ is a trademark of Calogero Scarnà.
 * The BastionGuard™ name and branding are not licensed under the GPL.
 */
 
#pragma once
 
#ifndef BSC_HAS_SDBUS
#define BSC_HAS_SDBUS 0
#endif
 
#if BSC_HAS_SDBUS
#include <systemd/sd-bus.h>
#endif
#include <glib.h>
#include <atomic>
#include <functional>
#include <string>
#include <thread>
#include <vector>
 
class TrayIcon {
public:
    TrayIcon();
    ~TrayIcon();
 
    bool start();
    void stop();
 
 
    void set_icon(const std::string& icon_name);
 
 
    void set_icon_file(const std::string& png_path, int target_px = 22);
 
    void set_tooltip(const std::string& text);
    void set_title(const std::string& title);
 
    void set_on_activate(std::function<void()> cb)  { on_activate_cb_ = std::move(cb); }
    void set_on_make_startup_persistent(std::function<void()> cb) { on_make_startup_persistent_cb_ = std::move(cb); }
    void set_on_quit(std::function<void()> cb)      { on_quit_cb_ = std::move(cb); }
    void bind_ui_context();
 
#if BSC_HAS_SDBUS
    static int sni_method_activate(sd_bus_message* m, void* userdata, sd_bus_error* ret_error);
    static int sni_method_context_menu(sd_bus_message* m, void* userdata, sd_bus_error* ret_error);
    static int sni_method_secondary_activate(sd_bus_message* m, void* userdata, sd_bus_error* ret_error);
 
    static int sni_prop_get(sd_bus* bus,
                            const char* path,
                            const char* interface,
                            const char* property,
                            sd_bus_message* reply,
                            void* userdata,
                            sd_bus_error* ret_error);
    static int dbusmenu_method_event_group(sd_bus_message* m, void* userdata, sd_bus_error* ret_error);
    static int dbusmenu_method_about_to_show_group(sd_bus_message* m, void* userdata, sd_bus_error* ret_error);
    static int dbusmenu_method_get_layout(sd_bus_message* m, void* userdata, sd_bus_error* ret_error);
    static int dbusmenu_method_get_children(sd_bus_message* m, void* userdata, sd_bus_error* ret_error);
    static int dbusmenu_method_get_group_properties(sd_bus_message* m, void* userdata, sd_bus_error* ret_error);
    static int dbusmenu_method_get_property(sd_bus_message* m, void* userdata, sd_bus_error* ret_error);
    static int dbusmenu_method_get_status(sd_bus_message* m, void* userdata, sd_bus_error* ret_error);
 
    static int dbusmenu_method_event(sd_bus_message* m, void* userdata, sd_bus_error* ret_error);
    static int dbusmenu_method_about_to_show(sd_bus_message* m, void* userdata, sd_bus_error* ret_error);
 
    static int dbusmenu_prop_get(sd_bus* bus,
                                 const char* path,
                                 const char* interface,
                                 const char* property,
                                 sd_bus_message* reply,
                                 void* userdata,
                                 sd_bus_error* ret_error);
#endif
 
private:
 
    std::string service_name_;
    std::string id_        = "bastionguard-sc";
    std::string title_     = "BastionGuard™ Secure Connection";
    std::string icon_name_ = "security-high";
    std::string tooltip_   = "BastionGuard™ Secure Connection";
    std::string status_    = "Active";
     GMainContext* ui_ctx_ = nullptr;
 
    bool have_pixmap_ = false;
    int  pix_w_ = 0;
    int  pix_h_ = 0;
    std::vector<uint8_t> pix_rgba_;
 
 
    std::function<void()> on_activate_cb_;
    std::function<void()> on_make_startup_persistent_cb_;
    std::function<void()> on_quit_cb_;
 
#if BSC_HAS_SDBUS
    sd_bus* bus_ = nullptr;
    sd_bus_slot* sni_slot_ = nullptr;
    sd_bus_slot* menu_slot_ = nullptr;
#endif
 
    std::thread bus_thread_;
    std::atomic_bool running_{false};
 
    static constexpr int MENU_ROOT             = 0;
    static constexpr int MENU_SHOW             = 1;
    static constexpr int MENU_PERSIST_STARTUP  = 2;
    static constexpr int MENU_QUIT             = 3;
 
private:
#if BSC_HAS_SDBUS
    static std::string make_service_name();
 
    bool acquire_bus();
    bool request_name();
    void release_bus();
 
    bool export_objects();
    void unexport_objects();
    bool register_to_watcher();
 
    void bus_loop();
 
    void emit_sni_signal(const char* signal_name);
    void emit_dbusmenu_layout_updated();
#endif
};