Unify json ld header handling.

lib/pleroma/web/activity_pub/transmogrifier.ex

@@ -607,7 +607,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     data =
       data
       |> Map.put("object", object)
-      |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+      |> Map.merge(Utils.make_json_ld_header())
 
     {:ok, data}
   end
@@ -626,7 +626,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
       data =
         data
         |> Map.put("object", object)
-        |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+        |> Map.merge(Utils.make_json_ld_header())
 
       {:ok, data}
     end
@@ -644,7 +644,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
       data =
         data
         |> Map.put("object", object)
-        |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+        |> Map.merge(Utils.make_json_ld_header())
 
       {:ok, data}
     end
@@ -654,7 +654,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     data =
       data
       |> maybe_fix_object_url
-      |> Map.put("@context", "https://www.w3.org/ns/activitystreams")
+      |> Map.merge(Utils.make_json_ld_header())
 
     {:ok, data}
   end

test/web/activity_pub/transmogrifier_test.exs

@@ -695,7 +695,9 @@ defmodule Pleroma.Web.ActivityPub.TransmogrifierTest do
       {:ok, activity} = CommonAPI.post(user, %{"status" => "hey"})
       {:ok, modified} = Transmogrifier.prepare_outgoing(activity.data)
 
-      assert modified["@context"] == "https://www.w3.org/ns/activitystreams"
+      assert modified["@context"] ==
+               Pleroma.Web.ActivityPub.Utils.make_json_ld_header()["@context"]
+
       assert modified["object"]["conversation"] == modified["context"]
     end