See #236: added a basic string list preference

api/funkwhale_api/common/preferences.py

@@ -1,4 +1,8 @@
 from django.conf import settings
+from django import forms
+
+from dynamic_preferences import serializers
+from dynamic_preferences import types
 from dynamic_preferences.registries import global_preferences_registry
 
 
@@ -10,3 +14,38 @@ class DefaultFromSettingMixin(object):
 def get(pref):
     manager = global_preferences_registry.manager()
     return manager[pref]
+
+
+class StringListSerializer(serializers.BaseSerializer):
+    separator = ','
+    sort = True
+
+    @classmethod
+    def to_db(cls, value, **kwargs):
+        if not value:
+            return
+
+        if type(value) not in [list, tuple]:
+            raise cls.exception(
+                "Cannot serialize, value {} is not a list or a tuple".format(
+                    value))
+
+        if cls.sort:
+            value = sorted(value)
+        return cls.separator.join(value)
+
+    @classmethod
+    def to_python(cls, value, **kwargs):
+        if not value:
+            return []
+        return value.split(',')
+
+
+class StringListPreference(types.BasePreferenceType):
+    serializer = StringListSerializer
+    field_class = forms.MultipleChoiceField
+
+    def get_api_additional_data(self):
+        d = super(StringListPreference, self).get_api_additional_data()
+        d['choices'] = self.get('choices')
+        return d