JSON Layout API

// Backend API endpoint (Node.js + Express)
app.get('/api/page/:pageId', async (req, res) => {
    const page = await db.query(
        'SELECT layout_json FROM pages WHERE id = ?',
        [req.params.pageId]
    );
    res.json(page.layout_json);
});

// Frontend
async function loadPage(pageId) {
    const layout = await fetch(`/api/page/${pageId}`).then(r => r.json());
    RSL.JSONLayout.renderLayout('#content', layout);
}

// Let users save custom dashboard layouts
function saveDashboard() {
    const layoutName = prompt('Name your dashboard layout:');
    if (layoutName) {
        RSL.StateManager.savePreset(layoutName);
        alert('Dashboard saved!');
    }
}

// On page load, restore user's last used dashboard
const savedPresets = RSL.StateManager.getPresetNames();
if (savedPresets.length > 0) {
    // Load first preset
    RSL.StateManager.loadPreset(savedPresets[0]);
}

// Show different layout variants to different users
const variants = {
    A: { /* layout with hero banner */ },
    B: { /* layout with video hero */ },
    C: { /* layout with carousel */ }
};

// Randomly assign variant
const variant = ['A', 'B', 'C'][Math.floor(Math.random() * 3)];

// Track which variant user sees
analytics.track('layout_variant_shown', { variant });

// Render the variant
RSL.JSONLayout.renderLayout('#hero', variants[variant]);

// Fetch products from API
const products = await fetch('/api/products').then(r => r.json());

// Create layout dynamically with semantic card type
const productLayout = {
    version: 2,
    layoutId: "products-grid",
    breakpoints: { xs: 1, sm: 2, lg: 4 },
    gap: "2rem",
    items: products.map(product => ({
        content: {
            type: "card",
            image: product.image,
            title: product.name,
            price: `$${product.price}`,
            button: { text: "Add to Cart", variant: "primary" }
        }
    }))
};

RSL.JSONLayout.renderLayout('#products', productLayout);

// Admin creates a layout template
const template = RSL.JSONLayout.buildFromDOM('#template-preview');

// Deploy to multiple client sites
const sites = ['site1.com', 'site2.com', 'site3.com'];

for (const site of sites) {
    await fetch(`https://${site}/api/update-layout`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
            section: 'homepage-hero',
            layout: template
        })
    });
}

console.log('Layout deployed to all sites!');

// User customizes their analytics dashboard
RSL.StateManager.savePreset('Sales Dashboard');
RSL.StateManager.savePreset('Traffic Dashboard');
RSL.StateManager.savePreset('Conversion Dashboard');

// Fetch products and render in customizable grid
const products = await getProducts();
const layout = generateProductGrid(products);
RSL.JSONLayout.renderLayout('#products', layout);

// CMS stores layout for each page section
const heroLayout = await cms.getLayout('homepage-hero');
const articlesLayout = await cms.getLayout('homepage-articles');
RSL.JSONLayout.renderLayout('#hero', heroLayout);
RSL.JSONLayout.renderLayout('#articles', articlesLayout);

// After user edits layout visually
const finalLayout = RSL.JSONLayout.buildFromDOM('#editor');

// Publish to production
await publishPage(finalLayout);

// Load tenant-specific layout
const tenantId = getCurrentTenant();
const layout = await fetch(`/api/tenant/${tenantId}/layout`).then(r => r.json());
RSL.JSONLayout.renderLayout('#app', layout);

// Student customizes their course dashboard
const studentLayout = RSL.StateManager.toJSON({ includeSchema: true });
await saveStudentPreferences(studentId, studentLayout);