function renderRichText(body) {
    let sections = body.sections || [];
    let html = [];
    sections.forEach(section => {
        html.push(renderSection(section));
    });
    return html.join('');
}

function renderSection(section) {
    let blocks = section.blocks || [];
    let inline = blocks.length > 1;
    let html = [];
    blocks.forEach(block => {
        html.push(renderBlock(block, inline));
    });
    return '<p>' + html.join('') + '</p>';
}

function renderBlock(block, inline) {
    let type = '';
    let inner = '';
    if (block.type === 'text') {
        type = 'text';
        inner = block.value;
    } else if (block.type === 'image') {
        type = 'image';
        if (inline === true) {
            type += ' inline';
        }
//        inner = '<img src="' + block.value + '" width="' + block.param.width + '" height="' + block.param.height + '"/>';
        inner = '<img src="' + block.value + '"/>';
    } else if (block.type === 'audio') {
        type = 'audio';
        inner = '<audio controls><source src="' + block.value + '" type="audio/mpeg"></audio>';
    }
    return '<span class="' + type + '">' + inner + '</span>';
}