twitter api: provide object descriptions as attachment description field

lib/pleroma/web/twitter_api/representers/object_representer.ex

@@ -9,7 +9,8 @@ def to_map(%Object{data: %{"url" => [url | _]}} = object, _opts) do
       url: url["href"] |> Pleroma.Web.MediaProxy.url(),
       mimetype: url["mediaType"] || url["mimeType"],
       id: data["uuid"],
-      oembed: false
+      oembed: false,
+      description: data["name"]
     }
   end
 
@@ -18,7 +19,8 @@ def to_map(%Object{data: %{"url" => url} = data}, _opts) when is_binary(url) do
       url: url |> Pleroma.Web.MediaProxy.url(),
       mimetype: data["mediaType"] || url["mimeType"],
       id: data["uuid"],
-      oembed: false
+      oembed: false,
+      description: data["name"]
     }
   end
 

test/web/twitter_api/representers/object_representer_test.exs

@@ -23,7 +23,8 @@ test "represent an image attachment" do
       id: 6,
       url: "someurl",
       mimetype: "sometype",
-      oembed: false
+      oembed: false,
+      description: nil
     }
 
     assert expected_object == ObjectRepresenter.to_map(object)
@@ -46,7 +47,8 @@ test "represents mastodon-style attachments" do
         "http://mastodon.example.org/system/media_attachments/files/000/000/001/original/8619f31c6edec470.png",
       mimetype: "image/png",
       oembed: false,
-      id: nil
+      id: nil,
+      description: "blabla"
     }
 
     assert expected_object == ObjectRepresenter.to_map(object)