Handle unknown categories from global search

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/federation/activity_stream/converter/event.ex

@@ -74,7 +74,7 @@ defmodule Mobilizon.Federation.ActivityStream.Converter.Event do
           medias: medias,
           begins_on: object["startTime"],
           ends_on: object["endTime"],
-          category: get_category(object["category"]),
+          category: Categories.get_category(object["category"]),
           visibility: visibility,
           join_options: Map.get(object, "joinMode", "free"),
           local: is_local?(object["id"]),
@@ -331,15 +331,4 @@ defmodule Mobilizon.Federation.ActivityStream.Converter.Event do
          _participant_count
        ),
        do: nil
-
-  @spec get_category(String.t() | nil) :: String.t()
-  defp get_category(nil), do: "MEETING"
-
-  defp get_category(category) when is_binary(category) do
-    if category in Enum.map(Categories.list(), &String.upcase(to_string(&1.id))) do
-      category
-    else
-      get_category(nil)
-    end
-  end
 end

lib/mobilizon/events/categories.ex

@@ -4,11 +4,27 @@ defmodule Mobilizon.Events.Categories do
   """
   import Mobilizon.Web.Gettext
 
+  @default "MEETING"
+
+  @spec default :: String.t()
+  def default do
+    @default
+  end
+
   @spec list :: [%{id: atom(), label: String.t()}]
   def list do
     build_in_categories() ++ extra_categories()
   end
 
+  @spec get_category(String.t() | nil) :: String.t()
+  def get_category(category) do
+    if category in Enum.map(list(), &String.upcase(to_string(&1.id))) do
+      category
+    else
+      default()
+    end
+  end
+
   defp build_in_categories do
     [
       %{

lib/service/global_search/search_mobilizon.ex

@@ -5,7 +5,7 @@ defmodule Mobilizon.Service.GlobalSearch.SearchMobilizon do
 
   alias Mobilizon.Actors.Actor
   alias Mobilizon.Addresses.Address
-  alias Mobilizon.Events.Tag
+  alias Mobilizon.Events.{Categories, Tag}
   alias Mobilizon.Service.GlobalSearch.{EventResult, GroupResult, Provider}
   alias Mobilizon.Service.HTTP.GenericJSONClient
   alias Mobilizon.Storage.Page
@@ -187,7 +187,7 @@ defmodule Mobilizon.Service.GlobalSearch.SearchMobilizon do
       ends_on: parse_date(data["endTime"]),
       url: data["url"],
       picture: picture,
-      category: String.to_existing_atom(String.downcase(data["category"])),
+      category: String.to_existing_atom(Categories.get_category(data["category"])),
       organizer_actor: %Actor{
         id: data["creator"]["id"],
         name: data["creator"]["displayName"],