Momentum-Apps/scenes/metroflip_scene_ravkav.c

#include "../metroflip_i.h"

#include <nfc/protocols/iso14443_4b/iso14443_4b_poller.h>

#define TAG "Metroflip:Scene:RavKav"

static NfcCommand metroflip_scene_ravkav_poller_callback(NfcGenericEvent event, void* context) {
    furi_assert(event.protocol == NfcProtocolIso14443_4b);
    NfcCommand next_command = NfcCommandContinue;
    MetroflipPollerEventType stage = MetroflipPollerEventTypeStart;

    Metroflip* app = context;
    FuriString* parsed_data = furi_string_alloc();
    Widget* widget = app->widget;
    furi_string_reset(app->text_box_store);

    const Iso14443_4bPollerEvent* iso14443_4b_event = event.event_data;

    Iso14443_4bPoller* iso14443_4b_poller = event.instance;

    BitBuffer* tx_buffer = bit_buffer_alloc(Metroflip_POLLER_MAX_BUFFER_SIZE);
    BitBuffer* rx_buffer = bit_buffer_alloc(Metroflip_POLLER_MAX_BUFFER_SIZE);

    if(iso14443_4b_event->type == Iso14443_4bPollerEventTypeReady) {
        if(stage == MetroflipPollerEventTypeStart) {
            nfc_device_set_data(
                app->nfc_device, NfcProtocolIso14443_4b, nfc_poller_get_data(app->poller));

            Iso14443_4bError error;
            size_t response_length = 0;

            do {
                // Select file of balance
                select_app[6] = 42;
                bit_buffer_append_bytes(tx_buffer, select_app, sizeof(select_app));
                error = iso14443_4b_poller_send_block(iso14443_4b_poller, tx_buffer, rx_buffer);
                if(error != Iso14443_4bErrorNone) {
                    FURI_LOG_I(TAG, "Select File: iso14443_4b_poller_send_block error %d", error);
                    stage = MetroflipPollerEventTypeFail;
                    view_dispatcher_send_custom_event(
                        app->view_dispatcher, MetroflipCustomEventPollerFail);
                    break;
                }

                // Check the response after selecting file
                response_length = bit_buffer_get_size_bytes(rx_buffer);
                if(bit_buffer_get_byte(rx_buffer, response_length - 2) != apdu_success[0] ||
                   bit_buffer_get_byte(rx_buffer, response_length - 1) != apdu_success[1]) {
                    FURI_LOG_I(
                        TAG,
                        "Select file failed: %02x%02x",
                        bit_buffer_get_byte(rx_buffer, response_length - 2),
                        bit_buffer_get_byte(rx_buffer, response_length - 1));
                    stage = MetroflipPollerEventTypeFail;
                    view_dispatcher_send_custom_event(
                        app->view_dispatcher, MetroflipCustomEventPollerFileNotFound);
                    break;
                }

                // Now send the read command
                read_file[2] = 1;
                bit_buffer_reset(tx_buffer);
                bit_buffer_append_bytes(tx_buffer, read_file, sizeof(read_file));
                error = iso14443_4b_poller_send_block(iso14443_4b_poller, tx_buffer, rx_buffer);
                if(error != Iso14443_4bErrorNone) {
                    FURI_LOG_I(TAG, "Read File: iso14443_4b_poller_send_block error %d", error);
                    stage = MetroflipPollerEventTypeFail;
                    view_dispatcher_send_custom_event(
                        app->view_dispatcher, MetroflipCustomEventPollerFail);
                    break;
                }

                // Check the response after reading the file
                response_length = bit_buffer_get_size_bytes(rx_buffer);
                if(bit_buffer_get_byte(rx_buffer, response_length - 2) != apdu_success[0] ||
                   bit_buffer_get_byte(rx_buffer, response_length - 1) != apdu_success[1]) {
                    FURI_LOG_I(
                        TAG,
                        "Read file failed: %02x%02x",
                        bit_buffer_get_byte(rx_buffer, response_length - 2),
                        bit_buffer_get_byte(rx_buffer, response_length - 1));
                    stage = MetroflipPollerEventTypeFail;
                    view_dispatcher_send_custom_event(
                        app->view_dispatcher, MetroflipCustomEventPollerFileNotFound);
                    break;
                }

                // Process the response data
                if(response_length < 3) {
                    FURI_LOG_I(TAG, "Response too short: %d bytes", response_length);
                    stage = MetroflipPollerEventTypeFail;
                    view_dispatcher_send_custom_event(
                        app->view_dispatcher, MetroflipCustomEventPollerFail);
                    break;
                }

                uint32_t value = 0;
                for(uint8_t i = 0; i < 3; i++) {
                    value = (value << 8) | bit_buffer_get_byte(rx_buffer, i);
                }

                float result = value / 100.0f;
                FURI_LOG_I(TAG, "Value: %.2f ILS", (double)result);
                furi_string_printf(parsed_data, "\e#Rav-Kav:\n\n");
                furi_string_cat_printf(parsed_data, "\e#Contract:\n");
                if(result != 0.0f) {
                    furi_string_cat_printf(parsed_data, "Balance: %.2f ILS\n", (double)result);
                } else {
                    furi_string_cat_printf(parsed_data, "Not a stored value Rav-Kav\n");
                }

                // Select app for profile
                select_app[6] = 1;
                bit_buffer_reset(tx_buffer);
                bit_buffer_append_bytes(tx_buffer, select_app, sizeof(select_app));
                error = iso14443_4b_poller_send_block(iso14443_4b_poller, tx_buffer, rx_buffer);
                if(error != Iso14443_4bErrorNone) {
                    FURI_LOG_I(TAG, "Select File: iso14443_4b_poller_send_block error %d", error);
                    stage = MetroflipPollerEventTypeFail;
                    view_dispatcher_send_custom_event(
                        app->view_dispatcher, MetroflipCustomEventPollerFail);
                    break;
                }

                // Check the response after selecting app
                response_length = bit_buffer_get_size_bytes(rx_buffer);
                if(bit_buffer_get_byte(rx_buffer, response_length - 2) != apdu_success[0] ||
                   bit_buffer_get_byte(rx_buffer, response_length - 1) != apdu_success[1]) {
                    FURI_LOG_I(
                        TAG,
                        "Select profile app failed: %02x%02x",
                        bit_buffer_get_byte(rx_buffer, response_length - 2),
                        bit_buffer_get_byte(rx_buffer, response_length - 1));
                    stage = MetroflipPollerEventTypeFail;
                    view_dispatcher_send_custom_event(
                        app->view_dispatcher, MetroflipCustomEventPollerFileNotFound);
                    break;
                }
                read_file[2] = 1;
                bit_buffer_reset(tx_buffer);
                bit_buffer_append_bytes(tx_buffer, read_file, sizeof(read_file));
                error = iso14443_4b_poller_send_block(iso14443_4b_poller, tx_buffer, rx_buffer);
                if(error != Iso14443_4bErrorNone) {
                    FURI_LOG_I(TAG, "Read File: iso14443_4b_poller_send_block error %d", error);
                    stage = MetroflipPollerEventTypeFail;
                    view_dispatcher_send_custom_event(
                        app->view_dispatcher, MetroflipCustomEventPollerFail);
                    break;
                }

                // Check the response after reading the file
                response_length = bit_buffer_get_size_bytes(rx_buffer);
                if(bit_buffer_get_byte(rx_buffer, response_length - 2) != apdu_success[0] ||
                   bit_buffer_get_byte(rx_buffer, response_length - 1) != apdu_success[1]) {
                    FURI_LOG_I(
                        TAG,
                        "Read file failed: %02x%02x",
                        bit_buffer_get_byte(rx_buffer, response_length - 2),
                        bit_buffer_get_byte(rx_buffer, response_length - 1));
                    stage = MetroflipPollerEventTypeFail;
                    view_dispatcher_send_custom_event(
                        app->view_dispatcher, MetroflipCustomEventPollerFileNotFound);
                    break;
                }
                char bit_representation[response_length * 8 + 1];
                bit_representation[0] = '\0';
                for(size_t i = 0; i < response_length; i++) {
                    char bits[9];
                    uint8_t byte = bit_buffer_get_byte(rx_buffer, i);
                    byte_to_binary(byte, bits);
                    strlcat(bit_representation, bits, sizeof(bit_representation));
                }
                int start = 54, end = 83;
                char bit_slice[end - start + 1];
                strncpy(bit_slice, bit_representation + start, end - start + 1);
                bit_slice[end - start + 1] = '\0';
                int decimal_value = binary_to_decimal(bit_slice);
                uint64_t result_timestamp = decimal_value + epoch + (3600 * 3);
                DateTime dt = {0};
                datetime_timestamp_to_datetime(result_timestamp, &dt);
                furi_string_cat_printf(parsed_data, "\nActivation date:\n");
                locale_format_datetime_cat(parsed_data, &dt, true);
                furi_string_cat_printf(parsed_data, "\n\n");

                // Select app for events
                select_app[6] = 16;
                bit_buffer_reset(tx_buffer);
                bit_buffer_append_bytes(tx_buffer, select_app, sizeof(select_app));
                error = iso14443_4b_poller_send_block(iso14443_4b_poller, tx_buffer, rx_buffer);
                if(error != Iso14443_4bErrorNone) {
                    FURI_LOG_I(TAG, "Select File: iso14443_4b_poller_send_block error %d", error);
                    stage = MetroflipPollerEventTypeFail;
                    view_dispatcher_send_custom_event(
                        app->view_dispatcher, MetroflipCustomEventPollerFail);
                    break;
                }

                // Check the response after selecting app
                response_length = bit_buffer_get_size_bytes(rx_buffer);
                if(bit_buffer_get_byte(rx_buffer, response_length - 2) != apdu_success[0] ||
                   bit_buffer_get_byte(rx_buffer, response_length - 1) != apdu_success[1]) {
                    FURI_LOG_I(
                        TAG,
                        "Select events app failed: %02x%02x",
                        bit_buffer_get_byte(rx_buffer, response_length - 2),
                        bit_buffer_get_byte(rx_buffer, response_length - 1));
                    stage = MetroflipPollerEventTypeFail;
                    view_dispatcher_send_custom_event(
                        app->view_dispatcher, MetroflipCustomEventPollerFileNotFound);
                    break;
                }
                furi_string_cat_printf(parsed_data, "\e#Latest Events:\n");
                // Now send the read command
                for(size_t i = 1, j = 6; i < 7 && j > 0; i++, j--) {
                    read_file[2] = i;
                    bit_buffer_reset(tx_buffer);
                    bit_buffer_append_bytes(tx_buffer, read_file, sizeof(read_file));
                    error =
                        iso14443_4b_poller_send_block(iso14443_4b_poller, tx_buffer, rx_buffer);
                    if(error != Iso14443_4bErrorNone) {
                        FURI_LOG_I(
                            TAG, "Read File: iso14443_4b_poller_send_block error %d", error);
                        stage = MetroflipPollerEventTypeFail;
                        view_dispatcher_send_custom_event(
                            app->view_dispatcher, MetroflipCustomEventPollerFail);
                        break;
                    }

                    // Check the response after reading the file
                    response_length = bit_buffer_get_size_bytes(rx_buffer);
                    if(bit_buffer_get_byte(rx_buffer, response_length - 2) != apdu_success[0] ||
                       bit_buffer_get_byte(rx_buffer, response_length - 1) != apdu_success[1]) {
                        FURI_LOG_I(
                            TAG,
                            "Read file failed: %02x%02x",
                            bit_buffer_get_byte(rx_buffer, response_length - 2),
                            bit_buffer_get_byte(rx_buffer, response_length - 1));
                        stage = MetroflipPollerEventTypeFail;
                        view_dispatcher_send_custom_event(
                            app->view_dispatcher, MetroflipCustomEventPollerFileNotFound);
                        break;
                    }
                    char bit_representation[response_length * 8 + 1];
                    bit_representation[0] = '\0';
                    for(size_t i = 0; i < response_length; i++) {
                        char bits[9];
                        uint8_t byte = bit_buffer_get_byte(rx_buffer, i);
                        byte_to_binary(byte, bits);
                        strlcat(bit_representation, bits, sizeof(bit_representation));
                    }
                    int start = 23, end = 52;
                    char bit_slice[end - start + 2];
                    strncpy(bit_slice, bit_representation + start, end - start + 1);
                    bit_slice[end - start + 1] = '\0';
                    int decimal_value = binary_to_decimal(bit_slice);
                    uint64_t result_timestamp = decimal_value + epoch + (3600 * 3);
                    DateTime dt = {0};
                    datetime_timestamp_to_datetime(result_timestamp, &dt);
                    furi_string_cat_printf(parsed_data, "\nEvent 0%d:\n", j);
                    locale_format_datetime_cat(parsed_data, &dt, true);
                    furi_string_cat_printf(parsed_data, "\n\n");
                }

                widget_add_text_scroll_element(
                    widget, 0, 0, 128, 64, furi_string_get_cstr(parsed_data));

                widget_add_button_element(
                    widget, GuiButtonTypeRight, "Exit", metroflip_exit_widget_callback, app);

                furi_string_free(parsed_data);
                view_dispatcher_switch_to_view(app->view_dispatcher, MetroflipViewWidget);
                metroflip_app_blink_stop(app);
                stage = MetroflipPollerEventTypeSuccess;
                next_command = NfcCommandStop;
            } while(false);

            if(stage != MetroflipPollerEventTypeSuccess) {
                next_command = NfcCommandStop;
            }
        }
    }
    bit_buffer_free(tx_buffer);
    bit_buffer_free(rx_buffer);

    return next_command;
}

void metroflip_scene_ravkav_on_enter(void* context) {
    Metroflip* app = context;
    dolphin_deed(DolphinDeedNfcRead);

    // Setup view
    Popup* popup = app->popup;
    popup_set_header(popup, "Apply\n card to\nthe back", 68, 30, AlignLeft, AlignTop);
    popup_set_icon(popup, 0, 3, &I_RFIDDolphinReceive_97x61);

    // Start worker
    view_dispatcher_switch_to_view(app->view_dispatcher, MetroflipViewPopup);
    nfc_scanner_alloc(app->nfc);
    app->poller = nfc_poller_alloc(app->nfc, NfcProtocolIso14443_4b);
    nfc_poller_start(app->poller, metroflip_scene_ravkav_poller_callback, app);

    metroflip_app_blink_start(app);
}

bool metroflip_scene_ravkav_on_event(void* context, SceneManagerEvent event) {
    Metroflip* app = context;
    bool consumed = false;

    if(event.type == SceneManagerEventTypeCustom) {
        if(event.event == MetroflipPollerEventTypeCardDetect) {
            Popup* popup = app->popup;
            popup_set_header(popup, "Scanning..", 68, 30, AlignLeft, AlignTop);
            consumed = true;
        } else if(event.event == MetroflipCustomEventPollerFileNotFound) {
            Popup* popup = app->popup;
            popup_set_header(popup, "Read Error,\n wrong card", 68, 30, AlignLeft, AlignTop);
            consumed = true;
        } else if(event.event == MetroflipCustomEventPollerFail) {
            Popup* popup = app->popup;
            popup_set_header(popup, "Error, try\n again", 68, 30, AlignLeft, AlignTop);
            consumed = true;
        }
    } else if(event.type == SceneManagerEventTypeBack) {
        scene_manager_search_and_switch_to_previous_scene(app->scene_manager, MetroflipSceneStart);
        consumed = true;
    }

    return consumed;
}

void metroflip_scene_ravkav_on_exit(void* context) {
    Metroflip* app = context;

    if(app->poller) {
        nfc_poller_stop(app->poller);
        nfc_poller_free(app->poller);
    }
    metroflip_app_blink_stop(app);
    widget_reset(app->widget);

    // Clear view
    popup_reset(app->popup);
}