Sort options for faceted navigation

syslabcom/scrum#1959

src/recensio/plone/vocabularies/configure.zcml

@@ -30,4 +30,9 @@
       component=".languages.AvailableContentLanguagesFactory"
       />
 
+  <utility
+      factory=".sort_options.SortOptionsVocabulary"
+      name="recensio.plone.vocabularies.sort_options"
+      />
+
 </configure>

src/recensio/plone/vocabularies/sort_options.py

@@ -0,0 +1,19 @@
+from recensio.plone import _
+from zope.interface import implementer
+from zope.schema.interfaces import IVocabularyFactory
+from zope.schema.vocabulary import SimpleTerm
+from zope.schema.vocabulary import SimpleVocabulary
+
+
+@implementer(IVocabularyFactory)
+class SortOptionsVocabulary:
+    def __call__(self, *args, **kwargs):
+        options = {
+            "relevance": _("Relevance"),
+            "sortable_title": _("Titel/alphabetisch"),
+            "modified": _("label_modification_date"),
+            "created": _("label_creation_date", default="Erstellungsdatum"),
+        }
+        return SimpleVocabulary(
+            [SimpleTerm(key, key, value) for key, value in options.items()]
+        )