bembo/renderLetter.js at main · jjriv/bembo · GitHub

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// renderLetter.js - Function to render letter elements
// Ensures a global letterData map exists for letter script files to populate
window.letterData = window.letterData || {};

// Dynamically load a letter definition script like letters/a.js
function loadLetterConfig(letter) {
    return new Promise((resolve, reject) => {
        const l = (letter || '').toLowerCase();
        if (!l.match(/^[a-z]$/)) {
            reject(new Error(`Invalid letter: ${letter}`));
            return;
        }
        // If it's already loaded, resolve immediately
        if (window.letterData && window.letterData[l]) {
            resolve();
            return;
        }
        const script = document.createElement('script');
        script.src = `letters/${l}.js`;
        script.async = true;
        script.onload = () => resolve();
        script.onerror = () => reject(new Error(`Failed to load config: ${script.src}`));
        document.head.appendChild(script);
    });
}
function renderLetter(letter) {
    const data = letterData[letter.toLowerCase()];

    if (!data) {
        console.error(`No data found for letter: ${letter}`);
        return;
    }

    // get the animal-page div
    const animalPage = document.getElementById('animal-page');

    // Set page background color
    document.body.style.backgroundColor = data.backgroundColor;

    // Create animal name h1
    const animalName = document.createElement('h1');
    animalName.className = 'animal-name';
    animalName.textContent = data.animalName.text;
    if (data.animalName.left) animalName.style.left = data.animalName.left;
    if (data.animalName.right) animalName.style.right = data.animalName.right;
    if (data.animalName.top) animalName.style.top = data.animalName.top;
    if (data.animalName.bottom) animalName.style.bottom = data.animalName.bottom;
    animalName.style.color = data.animalName.color;
    animalName.style.fontSize = data.animalName.fontSize;
    animalPage.appendChild(animalName);

    // Create animal letter h2 (if defined)
    if (data.animalLetter) {
        const animalLetter = document.createElement('h2');
        animalLetter.className = 'animal-letter';
        animalLetter.textContent = data.animalLetter.text;
        if (data.animalLetter.left) animalLetter.style.left = data.animalLetter.left;
        if (data.animalLetter.right) animalLetter.style.right = data.animalLetter.right;
        if (data.animalLetter.top) animalLetter.style.top = data.animalLetter.top;
        if (data.animalLetter.bottom) animalLetter.style.bottom = data.animalLetter.bottom;
        animalLetter.style.color = data.animalLetter.color;
        animalLetter.style.fontSize = data.animalLetter.fontSize;
        animalPage.appendChild(animalLetter);
    }

    // Create animal container
    const container = document.createElement('div');
    container.id = 'animal-container';
    container.style.setProperty('--scale', data.animalContainer.scale);
    container.style.left = data.animalContainer.left;
    container.style.top = data.animalContainer.top;

    // Create letter divs inside container
    data.letters.forEach(letterConfig => {
        const letterDiv = document.createElement('div');
        letterDiv.textContent = letterConfig.text;
        letterDiv.style.left = `calc(${letterConfig.left} * var(--scale))`;
        letterDiv.style.top = `calc(${letterConfig.top} * var(--scale))`;
        letterDiv.style.fontSize = `calc(${letterConfig.fontSize} * var(--scale))`;
        letterDiv.style.color = letterConfig.color;
        if (letterConfig.rotate) {
            letterDiv.style.transform = `rotate(${letterConfig.rotate})`;
        }
        if (letterConfig.scalex) {
            letterDiv.style.transform += ` scaleX(${letterConfig.scalex})`;
        }
        container.appendChild(letterDiv);
    });

    animalPage.appendChild(container);
}

// Run on page load
window.addEventListener('DOMContentLoaded', function() {
    // Get the letter from the URL query parameter
    const urlParams = new URLSearchParams(window.location.search);
    const letter = urlParams.get('letter');
    if (letter) {
        loadLetterConfig(letter)
            .then(() => {
                // Hide the title page only after successful load
                const titlePage = document.getElementById('title-page');
                if (titlePage) titlePage.style.display = 'none';
                renderLetter(letter);
            })
            .catch((err) => {
                console.error(err);
            });
    }
});