Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- app/controllers/about_controller.rb
- app/controllers/tags_controller.rb
- app/views/about/show.html.haml
- spec/views/about/show.html.haml_spec.rb

app/helpers/home_helper.rb

@@ -56,4 +56,12 @@ module HomeHelper
       'emojify'
     end
   end
+
+  def optional_link_to(condition, path, options = {}, &block)
+    if condition
+      link_to(path, options, &block)
+    else
+      content_tag(:div, &block)
+    end
+  end
 end

app/helpers/jsonld_helper.rb

@@ -47,6 +47,15 @@ module JsonLdHelper
     !uri.start_with?('http://', 'https://')
   end
 
+  def invalid_origin?(url)
+    return true if unsupported_uri_scheme?(url)
+
+    needle   = Addressable::URI.parse(url).host
+    haystack = Addressable::URI.parse(@account.uri).host
+
+    !haystack.casecmp(needle).zero?
+  end
+
   def canonicalize(json)
     graph = RDF::Graph.new << JSON::LD::API.toRdf(json, documentLoader: method(:load_jsonld_context))
     graph.dump(:normalize)