function fromJsonToHtmlTable(input) {

    let parsed = JSON.parse(input);

    let output = [];
    let firstLine = [];

    output.push('<table>');

    let keys = Object.keys(parsed[0]);
    if (keys.length > 0) {
        for (let key of keys) {
            firstLine.push(`<th>${escapeHtml(key)}</th>`);
        }

        output.push(`  <tr>${firstLine.join('')}</tr>`);
    }

    for (let obj of parsed) {
        let secondLine = [];
        for (let key of keys) {
            let currentKey = obj[key];
            secondLine.push(`<td>${escapeHtml(currentKey)}</td>`);
        }

        output.push(`  <tr>${secondLine.join('')}</tr>`);

    }

    output.push('</table>');

    return output.join('\n');

    function escapeHtml(input) {
        let inputStr = input.toString();
        let pattern = /[&<>" ]/g;

        let escapes = {
            '&': '&amp;',
            '<': '&lt;',
            '>': '&gt;',
            '"': '&quot;',
            ' ': '&nbsp;',

        };

        return inputStr.replace(pattern, a => escapes[a]);
    }
}