constants: add as_public constant and use it everywhere

lib/pleroma/web/twitter_api/twitter_api.ex

@@ -15,6 +15,8 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
 
   import Ecto.Query
 
+  require Pleroma.Constants
+
   def create_status(%User{} = user, %{"status" => _} = data) do
     CommonAPI.post(user, data)
   end
@@ -286,7 +288,7 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
       from(
         [a, o] in Activity.with_preloaded_object(Activity),
         where: fragment("?->>'type' = 'Create'", a.data),
-        where: "https://www.w3.org/ns/activitystreams#Public" in a.recipients,
+        where: ^Pleroma.Constants.as_public() in a.recipients,
         where:
           fragment(
             "to_tsvector('english', ?->>'content') @@ plainto_tsquery('english', ?)",

lib/pleroma/web/twitter_api/views/activity_view.ex

@@ -19,6 +19,7 @@ defmodule Pleroma.Web.TwitterAPI.ActivityView do
 
   import Ecto.Query
   require Logger
+  require Pleroma.Constants
 
   defp query_context_ids([]), do: []
 
@@ -91,7 +92,7 @@ defmodule Pleroma.Web.TwitterAPI.ActivityView do
       String.ends_with?(ap_id, "/followers") ->
         nil
 
-      ap_id == "https://www.w3.org/ns/activitystreams#Public" ->
+      ap_id == Pleroma.Constants.as_public() ->
         nil
 
       user = User.get_cached_by_ap_id(ap_id) ->

lib/pleroma/web/twitter_api/views/notification_view.ex

@@ -10,6 +10,8 @@ defmodule Pleroma.Web.TwitterAPI.NotificationView do
   alias Pleroma.Web.TwitterAPI.ActivityView
   alias Pleroma.Web.TwitterAPI.UserView
 
+  require Pleroma.Constants
+
   defp get_user(ap_id, opts) do
     cond do
       user = opts[:users][ap_id] ->
@@ -18,7 +20,7 @@ defmodule Pleroma.Web.TwitterAPI.NotificationView do
       String.ends_with?(ap_id, "/followers") ->
         nil
 
-      ap_id == "https://www.w3.org/ns/activitystreams#Public" ->
+      ap_id == Pleroma.Constants.as_public() ->
         nil
 
       true ->