Refactor and test Mobilizon.Federation.ActivityPub.Utils.get_actor/1

Raise exception when object contains no actor. Friendica seems to send an Update activity with no actor

Signed-off-by: Thomas Citharel <tcit@tcit.fr>
This commit is contained in:
Thomas Citharel 2021-11-24 16:14:09 +01:00 committed by tykayn
parent 8e7bb4f3fc
commit 9f3a2e1801
2 changed files with 116 additions and 9 deletions

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@ -21,6 +21,7 @@ defmodule Mobilizon.Federation.ActivityPub.Utils do
require Logger
@actor_types ["Group", "Person", "Application"]
@all_actor_types @actor_types ++ ["Organization", "Service"]
# Wraps an object into an activity
@spec create_activity(map(), boolean()) :: {:ok, Activity.t()}
@ -286,24 +287,51 @@ defmodule Mobilizon.Federation.ActivityPub.Utils do
actor
end
def get_actor(%{"actor" => actor}) when is_list(actor) do
if is_binary(Enum.at(actor, 0)) do
Enum.at(actor, 0)
else
actor
|> Enum.find(fn %{"type" => type} -> type in ["Person", "Service", "Application"] end)
|> Map.get("id")
def get_actor(%{"actor" => [actor | tail] = actor_list} = object)
when is_list(actor_list) and length(actor_list) > 0 do
res =
try do
object
|> Map.put("actor", actor)
|> get_actor()
rescue
ArgumentError -> nil
end
case res do
id when is_binary(id) ->
id
_ ->
object
|> Map.put("actor", tail)
|> get_actor()
end
end
def get_actor(%{"actor" => %{"id" => id}}) when is_binary(id) do
def get_actor(%{"actor" => %{"id" => id, "type" => type}})
when is_binary(id) and type in @all_actor_types do
id
end
def get_actor(%{"actor" => nil, "attributedTo" => actor}) when not is_nil(actor) do
def get_actor(%{"actor" => _, "attributedTo" => actor}) when not is_nil(actor) do
get_actor(%{"actor" => actor})
end
def get_actor(%{"actor" => %{"id" => id, "type" => type}})
when is_binary(id) do
raise ArgumentError,
message: "Object contains an actor object with invalid type: #{inspect(type)}"
end
def get_actor(%{"actor" => nil, "attributedTo" => nil}) do
raise ArgumentError, message: "Object contains both actor and attributedTo fields being null"
end
def get_actor(%{"actor" => _}) do
raise ArgumentError, message: "Object contains not actor information"
end
@doc """
Checks that an incoming AP object's actor matches the domain it came from.

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@ -59,4 +59,83 @@ defmodule Mobilizon.Federation.ActivityPub.UtilsTest do
})
end
end
describe "get_actor/1" do
test "with a string" do
assert Utils.get_actor(%{"actor" => "https://somewhere.tld/@someone"}) ==
"https://somewhere.tld/@someone"
end
test "with an object" do
assert Utils.get_actor(%{
"actor" => %{"id" => "https://somewhere.tld/@someone", "type" => "Person"}
}) ==
"https://somewhere.tld/@someone"
end
test "with an invalid object" do
assert_raise ArgumentError,
"Object contains an actor object with invalid type: \"Else\"",
fn ->
Utils.get_actor(%{
"actor" => %{"id" => "https://somewhere.tld/@someone", "type" => "Else"}
})
end
end
test "with a list" do
assert Utils.get_actor(%{
"actor" => ["https://somewhere.tld/@someone", "https://somewhere.else/@other"]
}) ==
"https://somewhere.tld/@someone"
end
test "with a list of objects" do
assert Utils.get_actor(%{
"actor" => [
%{"type" => "Person", "id" => "https://somewhere.tld/@someone"},
"https://somewhere.else/@other"
]
}) ==
"https://somewhere.tld/@someone"
end
test "with a list of objects containing an invalid one" do
assert Utils.get_actor(%{
"actor" => [
%{"type" => "Else", "id" => "https://somewhere.tld/@someone"},
"https://somewhere.else/@other"
]
}) ==
"https://somewhere.else/@other"
end
test "with an empty list" do
assert_raise ArgumentError,
"Object contains not actor information",
fn ->
Utils.get_actor(%{
"actor" => []
})
end
end
test "fallbacks to attributed_to" do
assert Utils.get_actor(%{
"actor" => nil,
"attributedTo" => "https://somewhere.tld/@someone"
}) == "https://somewhere.tld/@someone"
end
test "with no actor information" do
assert_raise ArgumentError,
"Object contains both actor and attributedTo fields being null",
fn ->
Utils.get_actor(%{
"actor" => nil,
"attributedTo" => nil
})
end
end
end
end