flowkey MIDI Navigation

Control flowkey navigation with your piano keys (104-108). This vibecoded script supports focused menu navigation and exercise control.
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// ==UserScript==
// @name         flowkey MIDI Navigation
// @name:de      flowkey MIDI Navigation
// @namespace    Violentmonkey Scripts
// @match        https://app.flowkey.com/*
// @grant        none
// @version      12.5
// @run-at       document-start
// @license      MIT
// @description  Control flowkey navigation with your piano keys (104-108). This vibecoded script supports focused menu navigation and exercise control.
// @description:de Steuere die flowkey-Navigation mit deinen Klaviertasten (104-108). Dieses vibecoded Script unterstützt fokussierte Menü-Navigation und Übungssteuerung.
// ==/UserScript==

(function() {
    'use strict';

    const KEYS = {
        104: 'escape',
        105: 'prev',
        106: 'next',
        107: 'repeat',
        108: 'start'
    };

    function trigger(type) {
        // --- 1. ESCAPE MODUS (Note 104) ---
        if (type === 'escape') {
            const esc = document.querySelector('[data-testid="exit-course"], .player-close-button, [data-testid="BackButton"], .close-button, button[class*="x49qfb"]');
            if (esc) { 
                esc.click(); 
                return; 
            }
        }

        const partMenu = document.querySelector('.exercise-parts-menu');

        // --- 2. MODUS: Song-Teile Fokus-Navigation (Original 12.2) ---
        if (partMenu && (partMenu.offsetWidth > 0)) {
            const parts = Array.from(partMenu.querySelectorAll('.exercise-part'));
            let currentIndex = parts.findIndex(p => p.classList.contains('selected'));

            if (currentIndex === -1) currentIndex = 0;

            if (type === 'next' && currentIndex < parts.length - 1) {
                parts.forEach(p => p.classList.remove('selected'));
                parts[currentIndex + 1].classList.add('selected');
                parts[currentIndex + 1].scrollIntoView({ block: 'nearest' });
                return;
            } else if (type === 'prev' && currentIndex > 0) {
                parts.forEach(p => p.classList.remove('selected'));
                parts[currentIndex - 1].classList.add('selected');
                parts[currentIndex - 1].scrollIntoView({ block: 'nearest' });
                return;
            } else if (type === 'start') {
                const selectedPart = partMenu.querySelector('.exercise-part.selected');
                if (selectedPart) selectedPart.click();
                return;
            }
        }

        // --- 3. MODUS: Standard Navigation (Original 12.2) ---
        let selector = '';
        if (type === 'start') {
            selector = '.primary-button, [data-testid="PrimaryButton"], .isPrimary';
        } else if (type === 'repeat') {
            selector = '.secondary-button, [data-testid="SecondaryButton"]';
        } else if (type === 'next') {
            selector = '[data-testid="ArrowRight"]';
        } else if (type === 'prev') {
            selector = '[data-testid="ArrowLeft"]';
        }

        const elements = document.querySelectorAll(selector);
        for (const el of elements) {
            if (el && (el.offsetWidth > 0 || el.offsetHeight > 0) && el.offsetParent !== null) {
                el.click();
                break;
            }
        }
    }

    function handleMIDI(event) {
        const [status, note, velocity] = event.data;
        if (velocity > 0 && status >= 144 && status <= 159) {
            const action = KEYS[note];
            if (action) {
                event.stopImmediatePropagation();
                event.stopPropagation();
                trigger(action);
            }
        }
    }

    if (navigator.requestMIDIAccess) {
        navigator.requestMIDIAccess().then(access => {
            for (const input of access.inputs.values()) {
                input.addEventListener('midimessage', handleMIDI, true);
            }
        });
    }

    const style = document.createElement('style');
    style.innerHTML = `
        .buttons, .message .buttons {
            display: flex !important;
            flex-direction: row-reverse !important;
        }
    `;
    document.documentElement.appendChild(style);
})();