Add specific social media image

src/pretix/presale/context.py

@@ -59,7 +59,14 @@ def contextprocessor(request):
 
         if request.event.settings.presale_css_file:
             ctx['css_file'] = default_storage.url(request.event.settings.presale_css_file)
+
         ctx['event_logo'] = request.event.settings.get('logo_image', as_type=str, default='')[7:]
+        ctx['social_image'] = request.event.cache.get_or_set(
+            'social_image_url',
+            request.event.social_image,
+            60
+        )
+
         ctx['event'] = request.event
         ctx['languages'] = [get_language_info(code) for code in request.event.settings.locales]
 

src/pretix/presale/templates/pretixpresale/event/base.html

@@ -11,6 +11,10 @@
     {% if event.settings.meta_noindex %}
         <meta name="robots" content="noindex, nofollow">
     {% endif %}
+    <meta property="og:type" content="website" />
+    {% if social_image %}
+        <meta property="og:image" content="{{ social_image }}" />
+    {% endif %}
     {{ block.super }}
 {% endblock %}
 {% block above %}

src/pretix/presale/templates/pretixpresale/event/index.html

@@ -12,10 +12,6 @@
     {{ block.super }}
     <meta property="og:title" content="{{ ev.name }}" />
     <meta property="og:description" content="{{ ev.get_date_range_display }}" />
-    {% if event_logo %}
-        <meta property="og:image" content="{{ event_logo|thumb:'5000x120' }}" />
-    {% endif %}
-    <meta property="og:type" content="website" />
     {% if subevent %}
         <meta property="og:url" content="{% abseventurl request.event "presale:event.index" subevent=subevent.pk %}" />
     {% else %}