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gtk_app.cpp
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gtk_app.cpp
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#include <gtk/gtk.h>
#include <map>
#include <string>
#include <iostream>
#include <semaphore>
#include <thread>
#include <chrono>
#include <stop_token>
#include "command_reader.hpp"
#include "hash_command.hpp"
#include "totp_command.hpp"
#include "totp_list_command.hpp"
#include "gtk_widget.hpp"
#include "otp_entry.hpp"
#include "otp_add_entry.hpp"
#include "gtk_app.hpp"
using namespace std;
namespace {
/**
* This is the a symlink that is automatically created by a udev-rule from the package
* (see udev rule in package for more information).
* For testing, you can change this to /dev/ttyACM<n> or whatever the generic name of your ACM
* driver is.
*/
const char* DEVICE = "/dev/esp-unlock";
enum class AppState {
NOT_CONNECTED,
CONNECTED,
CLOSING
};
map<string, GtkWidget*> widget_registry;
void color_text(string& text, const string& color) {
text.insert(0, "<span background=\"" + color + "\">");
text.append("</span>");
}
GApplication* g_app;
std::stop_source g_stop_source;
void on_destroy(GApplication* app, gpointer data) {
printf("destroy cb called\n");
g_stop_source.request_stop();
}
void on_app_activate(GApplication* app, gpointer data) {
g_app = app;
GtkWidget* window = gtk_application_window_new(GTK_APPLICATION(app));
gtk_window_resize((GtkWindow*) window, 300, 400);
g_signal_connect(window, "destroy", G_CALLBACK(on_destroy), NULL);
GtkWidget* layout = gtk_box_new(GTK_ORIENTATION_VERTICAL, 10);
// gtk_flow_box_set_row_spacing((GtkFlowBox*) layout, 10);
// We are using a simple label for now instead of InfoBar since it seems easier.
GtkWidget* info_bar = gtk_label_new(nullptr);
gtk_label_set_text(reinterpret_cast<GtkLabel*>(info_bar), "No device");
gtk_container_add(GTK_CONTAINER(layout), info_bar);
gtk_container_add(GTK_CONTAINER(window), layout);
widget_registry["window"] = window;
widget_registry["layout"] = layout;
widget_registry["info_bar"] = info_bar;
gtk_widget_show_all(GTK_WIDGET(window));
printf("shown all initial widgets\n");
}
std::binary_semaphore device_found(0);
std::list<std::string> key_names;
std::shared_ptr<CommandReader> cmd_reader;
std::list<std::shared_ptr<GTK_Widget> > otp_entries;
AppState app_state = AppState::NOT_CONNECTED;
void update_totp_names(std::list<std::string>& totp_key_names) {
std::shared_ptr<TOTP_ListCommand> list_cmd(new TOTP_ListCommand());
cmd_reader->execute_cmd(list_cmd);
totp_key_names = list_cmd->get_result().get();
}
/**
* Check for the ESP-Unlock hardware token
*/
void check_for_esp_unlock() {
printf("started checker\n");
bool found = false;
std::string result;
while (!found) {
// if (stop_semaphore->try_acquire()) {
if (g_stop_source.stop_requested()) {
return;
}
// GtkLabel* info_bar = (GtkLabel*) widget_registry["info_bar"];
try {
cmd_reader = make_shared<CommandReader>(DEVICE);
found = true;
result = "Device found";
color_text(result, "green");
// gtk_label_set_markup(info_bar, result.c_str());
} catch (ReaderException& e) {
// seemingly, EACCESS can happen once device has just been plugged in
if (e.get_error_number() == ENOENT || e.get_error_number() == EACCES) {
printf("not found, searching...\n");
std::this_thread::sleep_for(std::chrono::seconds(1));
continue; // user could insert the device later
} else {
if (e.get_error_number() == EPERM) {
result.append("ERROR: No permission to open device.");
} else {
printf("error_number: %d\n", e.get_error_number());
result.append("ERROR: Unkown error.");
}
color_text(result, "yellow");
printf("%s", result.c_str());
// gtk_label_set_markup(info_bar, result.c_str());
// break;
}
} catch (invalid_argument e) {
result = e.what();
color_text(result, "yellow");
printf("%s", result.c_str());
// gtk_label_set_markup(info_bar, result.c_str());
break;
} catch (out_of_range e) {
result = e.what();
color_text(result, "yellow");
printf("%s", result.c_str());
// gtk_label_set_markup(info_bar, result.c_str());
break;
}
}
if (found) {
printf("device found!\n");
try {
update_totp_names(key_names);
} catch (ReaderException& e) {
throw; // TODO: exit gracefully
}
device_found.release();
} else {
printf("ERROR while trying to find the device\n");
// TODO: exit gracefully
}
}
gboolean search_hook(gpointer user_data) {
if (device_found.try_acquire()) {
printf("got signal\n");
if (app_state == AppState::CONNECTED) {
printf("updating key names\n");
try {
update_totp_names(key_names);
} catch (ReaderException& e) {
throw; // TODO: exit gracefully
}
}
otp_entries.clear();
printf("adding widgets, key names:");
for (auto name: key_names) {
printf("%s, ", name.c_str());
}
printf("\n");
GtkWidget* layout = widget_registry["layout"];
for (auto name: key_names) {
otp_entries.push_back(make_shared<OTP_Entry>(GTK_CONTAINER(layout), std::string_view(name), cmd_reader));
}
otp_entries.push_back(make_shared<OTP_AddEntry>(g_app, GTK_CONTAINER(layout), cmd_reader, &device_found));
GtkLabel* info_bar = (GtkLabel*) widget_registry["info_bar"];
string device_found_text("Device Found");
color_text(device_found_text, "lightblue");
gtk_label_set_markup(info_bar, device_found_text.c_str());
gtk_widget_show_all(GTK_WIDGET(layout));
app_state = AppState::CONNECTED;
printf("done\n");
} else {
if (g_stop_source.stop_requested()) {
return false;
}
std::this_thread::sleep_for(std::chrono::milliseconds(10));
}
return true;
}
}
int run_gtk_app(int argc, char *argv[]) {
/*
* Since version 2.74, the default application flags change
* from G_APPLICATION_FLAGS_NONE to G_APPLICATION_DEFAULT_FLAGS,
* while G_APPLICATION_FLAGS_NONE are deprecated immediately.
* To prevent a compiler warning with newer glib versions, we have this switch.
*/
#if GLIB_CHECK_VERSION(2, 74, 0)
GApplicationFlags app_flags = G_APPLICATION_DEFAULT_FLAGS;
#else
GApplicationFlags app_flags = G_APPLICATION_FLAGS_NONE;
#endif
GtkApplication* app = gtk_application_new(nullptr, app_flags);
g_signal_connect(app, "activate", G_CALLBACK(on_app_activate), NULL);
g_idle_add(search_hook, nullptr);
std::jthread device_finder(check_for_esp_unlock);
int status = g_application_run(G_APPLICATION(app), argc, argv);
g_object_unref(app);
return status;
}