<!-- Open Graph tags -->
<meta property="og:site_name" content="{{ SITENAME }}"/>
{% if article %}
    <meta property="og:type" content="article"/>
    <meta property="og:title" content="{{ article.title|striptags|escape }}"/>
    <meta property="og:url" content="{{ SITEURL }}/{{article.url}}"/>
    <meta property="og:description" content="{{ article.summary|striptags|escape }}"/>
    <meta property="article:published_time" content="{{ article.date.strftime("%Y-%m-%d") }}" />
    <meta property="article:sec