truncate Approved Media Hosts in /formatting

files/helpers/config/const.py

@@ -889,6 +889,12 @@ approved_embed_hosts = [
 	'i.ytimg.com/vi',
 ]
 
+approved_embed_hosts_domains = []
+for h in approved_embed_hosts:
+	domain = tldextract.extract(h).registered_domain
+	if domain not in approved_embed_hosts_domains:
+		approved_embed_hosts_domains.append(domain)
+
 if SITE_IMAGES not in approved_embed_hosts:
 	approved_embed_hosts = [SITE_IMAGES] + approved_embed_hosts
 

files/routes/static.py

@@ -376,7 +376,7 @@ def mutes(v):
 @limiter.limit(DEFAULT_RATELIMIT, deduct_when=lambda response: response.status_code < 400, key_func=get_ID)
 @auth_required
 def formatting(v):
-	return render_template("formatting.html", v=v, allowed_tags=allowed_tags, allowed_styles=allowed_styles)
+	return render_template("formatting.html", v=v, allowed_tags=allowed_tags, allowed_styles=allowed_styles, approved_embed_hosts_domains=approved_embed_hosts_domains)
 
 @app.get("/app")
 @limiter.limit(DEFAULT_RATELIMIT, deduct_when=lambda response: response.status_code < 400)

files/templates/formatting.html

@@ -456,7 +456,7 @@ And we allow custom HTML in most places:
 Image files, video files, and audio files from these sources will get embedded automatically:
 
 <ul class="mt-3">
-	{% for host in approved_embed_hosts %}
+	{% for host in approved_embed_hosts_domains %}
 		<li>{{host}}</li>
 	{% endfor %}
 </ul>