[FL-3458] Add confirmation before exiting USB-UART (#3043)

* Add confirmation before exiting USB-UART
* Redo the confirm view to be a scene to ignore the back button

Co-authored-by: hedger <hedger@users.noreply.github.com>
Co-authored-by: あく <alleteam@gmail.com>

applications/main/gpio/scenes/gpio_scene_config.h

@@ -3,3 +3,4 @@ ADD_SCENE(gpio, test, Test)
 ADD_SCENE(gpio, usb_uart, UsbUart)
 ADD_SCENE(gpio, usb_uart_cfg, UsbUartCfg)
 ADD_SCENE(gpio, usb_uart_close_rpc, UsbUartCloseRpc)
+ADD_SCENE(gpio, exit_confirm, ExitConfirm)

applications/main/gpio/scenes/gpio_scene_exit_confirm.c

@@ -0,0 +1,44 @@
+#include "gpio_app_i.h"
+
+void gpio_scene_exit_confirm_dialog_callback(DialogExResult result, void* context) {
+    GpioApp* app = context;
+
+    view_dispatcher_send_custom_event(app->view_dispatcher, result);
+}
+
+void gpio_scene_exit_confirm_on_enter(void* context) {
+    GpioApp* app = context;
+    DialogEx* dialog = app->dialog;
+
+    dialog_ex_set_context(dialog, app);
+    dialog_ex_set_left_button_text(dialog, "Exit");
+    dialog_ex_set_right_button_text(dialog, "Stay");
+    dialog_ex_set_header(dialog, "Exit USB-UART?", 22, 12, AlignLeft, AlignTop);
+    dialog_ex_set_result_callback(dialog, gpio_scene_exit_confirm_dialog_callback);
+
+    view_dispatcher_switch_to_view(app->view_dispatcher, GpioAppViewExitConfirm);
+}
+
+bool gpio_scene_exit_confirm_on_event(void* context, SceneManagerEvent event) {
+    GpioApp* app = context;
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+        if(event.event == DialogExResultRight) {
+            consumed = scene_manager_previous_scene(app->scene_manager);
+        } else if(event.event == DialogExResultLeft) {
+            scene_manager_search_and_switch_to_previous_scene(app->scene_manager, GpioSceneStart);
+        }
+    } else if(event.type == SceneManagerEventTypeBack) {
+        consumed = true;
+    }
+
+    return consumed;
+}
+
+void gpio_scene_exit_confirm_on_exit(void* context) {
+    GpioApp* app = context;
+
+    // Clean view
+    dialog_ex_reset(app->dialog);
+}

applications/main/gpio/scenes/gpio_scene_usb_uart.c

@@ -42,6 +42,9 @@ bool gpio_scene_usb_uart_on_event(void* context, SceneManagerEvent event) {
         scene_manager_set_scene_state(app->scene_manager, GpioSceneUsbUart, 1);
         scene_manager_next_scene(app->scene_manager, GpioSceneUsbUartCfg);
         return true;
+    } else if(event.type == SceneManagerEventTypeBack) {
+        scene_manager_next_scene(app->scene_manager, GpioSceneExitConfirm);
+        return true;
     } else if(event.type == SceneManagerEventTypeTick) {
         uint32_t tx_cnt_last = scene_usb_uart->state.tx_cnt;
         uint32_t rx_cnt_last = scene_usb_uart->state.rx_cnt;