flipperzero-firmware/applications/main/ibutton/scenes/ibutton_scene_emulate.c

#include "../ibutton_i.h"
#include <core/log.h>
#include <toolbox/path.h>

#define EMULATE_TIMEOUT_TICKS 10

static void ibutton_scene_emulate_callback(void* context, bool emulated) {
    iButton* ibutton = context;
    if(emulated) {
        view_dispatcher_send_custom_event(
            ibutton->view_dispatcher, iButtonCustomEventWorkerEmulated);
    }
}

void ibutton_scene_emulate_on_enter(void* context) {
    iButton* ibutton = context;
    Widget* widget = ibutton->widget;
    iButtonKey* key = ibutton->key;

    const uint8_t* key_data = ibutton_key_get_data_p(key);

    FuriString* key_name;
    key_name = furi_string_alloc();
    if(furi_string_end_with(ibutton->file_path, IBUTTON_APP_EXTENSION)) {
        path_extract_filename(ibutton->file_path, key_name, true);
    }

    // check that stored key has name
    if(!furi_string_empty(key_name)) {
        ibutton_text_store_set(ibutton, "%s", furi_string_get_cstr(key_name));
    } else {
        // if not, show key data
        switch(ibutton_key_get_type(key)) {
        case iButtonKeyDS1990:
            ibutton_text_store_set(
                ibutton,
                "%02X %02X %02X %02X\n%02X %02X %02X %02X",
                key_data[0],
                key_data[1],
                key_data[2],
                key_data[3],
                key_data[4],
                key_data[5],
                key_data[6],
                key_data[7]);
            break;
        case iButtonKeyCyfral:
            ibutton_text_store_set(ibutton, "%02X %02X", key_data[0], key_data[1]);
            break;
        case iButtonKeyMetakom:
            ibutton_text_store_set(
                ibutton, "%02X %02X %02X %02X", key_data[0], key_data[1], key_data[2], key_data[3]);
            break;
        }
    }

    widget_add_string_multiline_element(
        widget, 90, 10, AlignCenter, AlignTop, FontPrimary, "iButton\nemulating");
    widget_add_icon_element(widget, 3, 10, &I_iButtonKey_49x44);
    widget_add_text_box_element(
        widget, 54, 39, 75, 22, AlignCenter, AlignCenter, ibutton->text_store, true);

    view_dispatcher_switch_to_view(ibutton->view_dispatcher, iButtonViewWidget);

    ibutton_worker_emulate_set_callback(
        ibutton->key_worker, ibutton_scene_emulate_callback, ibutton);
    ibutton_worker_emulate_start(ibutton->key_worker, key);

    furi_string_free(key_name);

    ibutton_notification_message(ibutton, iButtonNotificationMessageEmulateStart);
}

bool ibutton_scene_emulate_on_event(void* context, SceneManagerEvent event) {
    iButton* ibutton = context;
    bool consumed = false;

    if(event.type == SceneManagerEventTypeTick) {
        uint32_t cnt = scene_manager_get_scene_state(ibutton->scene_manager, iButtonSceneEmulate);
        if(cnt > 0) {
            cnt--;
            if(cnt == 0) {
                ibutton_notification_message(ibutton, iButtonNotificationMessageEmulateBlink);
            }
            scene_manager_set_scene_state(ibutton->scene_manager, iButtonSceneEmulate, cnt);
        }
        consumed = true;
    } else if(event.type == SceneManagerEventTypeCustom) {
        consumed = true;
        if(event.event == iButtonCustomEventWorkerEmulated) {
            if(scene_manager_get_scene_state(ibutton->scene_manager, iButtonSceneEmulate) == 0) {
                ibutton_notification_message(ibutton, iButtonNotificationMessageYellowBlink);
            }
            scene_manager_set_scene_state(
                ibutton->scene_manager, iButtonSceneEmulate, EMULATE_TIMEOUT_TICKS);
        }
    }

    return consumed;
}

void ibutton_scene_emulate_on_exit(void* context) {
    iButton* ibutton = context;
    ibutton_worker_stop(ibutton->key_worker);
    widget_reset(ibutton->widget);
    ibutton_notification_message(ibutton, iButtonNotificationMessageBlinkStop);
}