Issue 5329 - Added standard social media meta data to website-defaults

includes/meta/social.tmpl

+{#
+ # This file is part of website-defaults
+ # Copyright (C) 2016-2017 eyeo GmbH
+ #
+ # website-defaults is free software: you can redistribute it and/or
+ # modify it under the terms of the GNU General Public License as published by
+ # the Free Software Foundation, either version 3 of the License, or
+ # (at your option) any later version.
+ #
+ # website-defaults is distributed in the hope that it will be useful,
+ # but WITHOUT ANY WARRANTY; without even the implied warranty of
+ # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ # GNU General Public License for more details.
+ #
+ # You should have received a copy of the GNU General Public License
+ # along with website-defaults.  If not, see <http://www.gnu.org/licenses/>.
+ #}
+
+{% macro meta_tag(property, content, defaultContent=None) -%}
+  {% if content %}
+    <meta property="{{ property }}" content="{{ content }}">
+  {% elif defaultContent %}
+    <meta property="{{ property }}" content="{{ defaultContent }}">
+  {% endif %}
+{%- endmacro %}
+
+{% set social_media_meta = [
+  ('og:url', og_url, get_canonical_url(page)),
+  ('og:type', og_type, 'website'),
+  ('og:site_name', og_site_name, get_string('site-name', 'global') if has_string('site-name', 'global') else None),
+  ('og:title', og_title, title | translate('page-title', 'Meta data') if title else None),
+  ('og:description', og_description, description | translate('page-description', 'Meta data') if description else None),
+  ('og:image', og_image, image),
+  ('og:image:alt', og_image_alt, image_alt),
+  ('og:locale', og_locale, locale | to_og_locale),
+  ('fb:app_id', facebook_id, None),
+  ('twitter:site', twitter_site, '@eyeo'),
+  ('twitter:card', twitter_card, 'summary_large_image' if og_image or twitter_image or image else 'summary'),
+  ('twitter:image', twitter_image, None),
+  ('twitter:image:alt', twitter_image_alt, None),
+  ('p:domain_verify', pinterest_id, None),
+] %}
+
+{% for property, content, defaultContent in social_media_meta %}
+  {{ meta_tag(property, content, defaultContent) }}
+{% endfor %}
+
+{% for alternate_locale in available_locales %}
+  {% if alternate_locale != locale %}
+    {{ meta_tag(('og:locale:alternate', alternate_locale | to_og_locale)) }}
+  {% endif %}
+{% endfor %}