mayhem-firmware/firmware/application/external/shoppingcart_lock/shoppingcart_lock.cpp

// RocketGod's Shopping Cart Lock app
// https://betaskynet.com
#include "shoppingcart_lock.hpp"

using namespace portapack;

namespace ui::external_app::shoppingcart_lock {

void ShoppingCartLock::log_event(const std::string& message) {
    static const size_t MAX_LOG_LINES = 50;
    static std::vector<std::string> message_history;

    message_history.push_back(message);
    if (message_history.size() > MAX_LOG_LINES) {
        message_history.erase(message_history.begin());
        menu_view.clear();
        for (const auto& msg : message_history) {
            menu_view.add_item({msg,
                                ui::Theme::getInstance()->fg_green->foreground,
                                nullptr,
                                [](KeyEvent) {}});
        }
    } else {
        menu_view.add_item({message,
                            ui::Theme::getInstance()->fg_green->foreground,
                            nullptr,
                            [](KeyEvent) {}});
    }

    menu_view.set_highlighted(menu_view.item_count() - 1);
}

bool ShoppingCartLock::is_active() const {
    return (bool)replay_thread;
}

void ShoppingCartLock::focus() {
    menu_view.focus();
}

void ShoppingCartLock::stop() {
    log_event(">>> STOP_SEQUENCE_START");
    if (is_active()) {
        log_event("... Resetting Replay Thread");
        replay_thread.reset();
    }
    log_event("... Stopping Audio Output");
    audio::output::stop();

    log_event("... Resetting State Variables");
    transmitter_model.disable();
    ready_signal = false;
    thread_sync_complete = false;
    looping = false;
    current_file = "";
    log_event("<<< STOP_SEQUENCE_COMPLETE");
}

std::string ShoppingCartLock::list_wav_files() {
    log_event(">>> WAV_SCAN_START");
    auto reader = std::make_unique<WAVFileReader>();
    bool found_lock = false;
    bool found_unlock = false;

    for (const auto& entry : std::filesystem::directory_iterator(wav_dir, u"*")) {
        if (std::filesystem::is_regular_file(entry.status())) {
            auto filename = entry.path().filename().string();
            std::transform(filename.begin(), filename.end(), filename.begin(), ::tolower);

            if (filename == shoppingcart_lock_file || filename == shoppingcart_unlock_file) {
                std::string file_path = (wav_dir / filename).string();
                if (reader->open(file_path)) {
                    if (filename == shoppingcart_lock_file) {
                        found_lock = true;
                        log_event("... Found: " + shoppingcart_lock_file);
                        log_event("Sample Rate: " + std::to_string(reader->sample_rate()));
                        log_event("Channels: " + std::to_string(reader->channels()));
                        log_event("Bits/Sample: " + std::to_string(reader->bits_per_sample()));
                    }
                    if (filename == shoppingcart_unlock_file) {
                        found_unlock = true;
                        log_event("... Found: " + shoppingcart_unlock_file);
                        log_event("Sample Rate: " + std::to_string(reader->sample_rate()));
                        log_event("Channels: " + std::to_string(reader->channels()));
                        log_event("Bits/Sample: " + std::to_string(reader->bits_per_sample()));
                    }
                }
            }

            if (found_lock && found_unlock) {
                break;
            }
        }
    }

    if (!found_lock || !found_unlock) {
        log_event("!!! Missing Required Files:");
        if (!found_lock) log_event("!!! Missing: " + shoppingcart_lock_file);
        if (!found_unlock) log_event("!!! Missing: " + shoppingcart_unlock_file);
        menu_view.hidden(true);
        text_empty.hidden(false);
    } else {
        log_event("... All Required Files Found");
        menu_view.hidden(false);
        text_empty.hidden(true);
    }

    log_event("<<< WAV_SCAN_COMPLETE");
    return found_lock && found_unlock ? "Required WAV files found" : "Missing required WAV files";
}

void ShoppingCartLock::wait_for_thread() {
    uint32_t timeout = 100;
    while (!ready_signal && timeout > 0) {
        chThdYield();
        timeout--;
    }
}

void ShoppingCartLock::restart_playback() {
    auto reader = std::make_unique<WAVFileReader>();
    std::string file_path = (wav_dir / current_file).string();

    if (!reader->open(file_path)) return;

    replay_thread = std::make_unique<ReplayThread>(
        std::move(reader),
        BUFFER_SIZE,
        NUM_BUFFERS,
        &ready_signal,
        [](uint32_t return_code) {
            ReplayThreadDoneMessage message{return_code};
            EventDispatcher::send_message(message);
        });

    log_event(">> SENDING <<");
    audio::output::start();
    transmitter_model.enable();
}

void ShoppingCartLock::play_audio(const std::string& filename, bool loop) {
    auto reader = std::make_unique<WAVFileReader>();
    stop();

    std::string file_path = (wav_dir / filename).string();
    if (!reader->open(file_path)) {
        nav_.display_modal("Error", "Cannot open " + filename);
        return;
    }

    const uint32_t wav_sample_rate = reader->sample_rate();
    const uint16_t wav_bits_per_sample = reader->bits_per_sample();

    current_file = filename;
    looping = loop;

    replay_thread = std::make_unique<ReplayThread>(
        std::move(reader),
        BUFFER_SIZE,
        NUM_BUFFERS,
        &ready_signal,
        [](uint32_t return_code) {
            ReplayThreadDoneMessage message{return_code};
            EventDispatcher::send_message(message);
        });

    wait_for_thread();

    log_event("... Configuring Baseband");

    const uint32_t bb_sample_rate = 1536000;
    const uint32_t decimation = bb_sample_rate / wav_sample_rate;

    baseband::set_audiotx_config(
        bb_sample_rate / decimation,
        0.0f,
        5.0f,
        wav_bits_per_sample,
        wav_bits_per_sample,
        0,
        true,
        false,
        false,
        false);

    baseband::set_sample_rate(wav_sample_rate);

    log_event("... Starting Audio Output");
    audio::output::start();
    log_event("... Setting Max Volume");
    audio::headphone::set_volume(audio::headphone::volume_range().max);

    transmitter_model.enable();

    log_event(">>> Playback Started <<<");
}

ShoppingCartLock::ShoppingCartLock(NavigationView& nav)
    : nav_{nav} {
    add_children({&menu_view,
                  &text_empty,
                  &button_lock,
                  &button_unlock,
                  &button_stop});

    button_lock.on_select = [this](Button&) {
        if (is_active()) stop();
        log_event(">>> LOCK_SEQUENCE_START");
        play_audio(shoppingcart_lock_file, true);
    };

    button_unlock.on_select = [this](Button&) {
        if (is_active()) stop();
        log_event(">>> UNLOCK_SEQUENCE_START");
        play_audio(shoppingcart_unlock_file, true);
    };

    button_stop.on_select = [this](Button&) {
        log_event(">>> STOPPING AUDIO");
        stop();
    };

    list_wav_files();

    log_event("[+] INITIALIZATION COMPLETE");
    log_event("[+] PORTAPACK ARMED");
    log_event("[*] STATUS: READY");
}

ShoppingCartLock::~ShoppingCartLock() {
    stop();
    baseband::shutdown();
}

}  // namespace ui::external_app::shoppingcart_lock