Add rich social sharing support

templates/entry.html

@@ -1,6 +1,10 @@
 {% extends "base.html" %}
 {% from "macros/tag-links.html" import tag_links with context %}
 {% from "macros/narration-player.html" import narration_player with context %}
+{% from "macros/social-sharing.html" import social_metadata, share_controls with context %}
+{% block social_head %}
+  {% if this.parent._id == 'blog' %}{{ social_metadata(this, 'BlogPosting', 'article') }}{% else %}{{ social_metadata(this, 'Article', 'article') }}{% endif %}
+{% endblock %}
 {% block body %}
 {% if this.parent._id == 'blog' %}
 <article class="blog-post-layout shell">
@@ -37,6 +41,7 @@
     {{ this.body }}
     {% if this.external_url %}<p><a class="button-link" href="{{ this.external_url }}">Visit project →</a></p>{% endif %}
   </div>
+  {{ share_controls(this, 'post') }}
 </article>
 {% elif this.parent._id == 'articles' %}
 {% set article_word_count = this.body|striptags|wordcount %}
@@ -105,6 +110,7 @@
     {{ this.body }}
     {% if this.external_url %}<p><a class="button-link" href="{{ this.external_url }}">Visit project →</a></p>{% endif %}
   </div>
+  {{ share_controls(this, 'article') }}
 </article>
 {% else %}
 <article>
@@ -119,6 +125,7 @@
     <div class="shell prose">
       {{ this.body }}
       {% if this.external_url %}<p><a class="button-link" href="{{ this.external_url }}">Visit project →</a></p>{% endif %}
+      {{ share_controls(this, 'page') }}
     </div>
   </section>
 </article>