mobilizon.chapril.org-mobil.../lib/federation/activity_pub/transmogrifier.ex
Thomas Citharel 9b27e70eb0
Save remote profiles avatars & banners locally
Signed-off-by: Thomas Citharel <tcit@tcit.fr>
2020-12-15 17:17:42 +01:00

1088 lines
38 KiB
Elixir
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

# Portions of this file are derived from Pleroma:
# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social>
# SPDX-License-Identifier: AGPL-3.0-only
# Upstream: https://git.pleroma.social/pleroma/pleroma/blob/develop/lib/pleroma/web/activity_pub/transmogrifier.ex
defmodule Mobilizon.Federation.ActivityPub.Transmogrifier do
@moduledoc """
A module to handle coding from internal to wire ActivityPub and back.
"""
alias Mobilizon.{Actors, Discussions, Events, Posts, Resources, Todos}
alias Mobilizon.Actors.{Actor, Follower, Member}
alias Mobilizon.Discussions.Comment
alias Mobilizon.Events.{Event, Participant}
alias Mobilizon.Posts.Post
alias Mobilizon.Resources.Resource
alias Mobilizon.Todos.{Todo, TodoList}
alias Mobilizon.Federation.ActivityPub
alias Mobilizon.Federation.ActivityPub.{Activity, Refresher, Relay, Utils}
alias Mobilizon.Federation.ActivityPub.Types.Ownable
alias Mobilizon.Federation.ActivityStream.{Converter, Convertible}
alias Mobilizon.Tombstone
alias Mobilizon.Web.Email.Participation
alias Mobilizon.Web.Endpoint
require Logger
@doc """
Handle incoming activities
"""
def handle_incoming(%{"id" => nil}), do: :error
def handle_incoming(%{"id" => ""}), do: :error
def handle_incoming(%{"type" => "Flag"} = data) do
with params <- Converter.Flag.as_to_model(data) do
params = %{
reporter_id: params["reporter"].id,
reported_id: params["reported"].id,
comments_ids: params["comments"] |> Enum.map(& &1.id),
content: params["content"] || "",
additional: %{
"cc" => [params["reported"].url]
},
event_id: if(is_nil(params["event"]), do: nil, else: params["event"].id || nil),
local: false
}
ActivityPub.flag(params, false)
end
end
# Handles a `Create` activity for `Note` (comments) objects
#
# The following actions are performed
# * Fetch the author of the activity
# * Convert the ActivityStream data to the comment model format (it also finds and inserts tags)
# * Get (by it's URL) or create the comment with this data
# * Insert eventual mentions in the database
# * Convert the comment back in ActivityStreams data
# * Wrap this data back into a `Create` activity
# * Return the activity and the comment object
def handle_incoming(%{"type" => "Create", "object" => %{"type" => "Note"} = object}) do
Logger.info("Handle incoming to create notes")
with object_data when is_map(object_data) <-
object |> Converter.Comment.as_to_model_data(),
{:existing_comment, {:error, :comment_not_found}} <-
{:existing_comment, Discussions.get_comment_from_url_with_preload(object_data.url)},
object_data <- transform_object_data_for_discussion(object_data),
# Check should be better
{:ok, %Activity{} = activity, entity} <-
(if is_data_for_comment_or_discussion?(object_data) do
Logger.debug("Chosing to create a regular comment")
ActivityPub.create(:comment, object_data, false)
else
Logger.debug("Chosing to initialize or add a comment to a conversation")
ActivityPub.create(:discussion, object_data, false)
end) do
{:ok, activity, entity}
else
{:existing_comment, {:ok, %Comment{} = comment}} ->
{:ok, nil, comment}
{:error, :event_comments_are_closed} ->
Logger.debug("Tried to reply to an event for which comments are closed")
:error
end
end
# Handles a `Create` activity for `Event` objects
#
# The following actions are performed
# * Fetch the author of the activity
# * Convert the ActivityStream data to the event model format (it also finds and inserts tags)
# * Get (by it's URL) or create the event with this data
# * Insert eventual mentions in the database
# * Convert the event back in ActivityStreams data
# * Wrap this data back into a `Create` activity
# * Return the activity and the event object
def handle_incoming(%{"type" => "Create", "object" => %{"type" => "Event"} = object}) do
Logger.info("Handle incoming to create event")
with object_data when is_map(object_data) <-
object |> Converter.Event.as_to_model_data(),
{:existing_event, nil} <- {:existing_event, Events.get_event_by_url(object_data.url)},
{:ok, %Activity{} = activity, %Event{} = event} <-
ActivityPub.create(:event, object_data, false) do
{:ok, activity, event}
else
{:existing_event, %Event{} = event} -> {:ok, nil, event}
{:error, _, _} -> :error
{:error, _} -> :error
end
end
def handle_incoming(%{
"type" => "Create",
"object" => %{"type" => "Group", "id" => group_url} = _object
}) do
Logger.info("Handle incoming to create a group")
with {:ok, %Actor{} = group} <- ActivityPub.get_or_fetch_actor_by_url(group_url) do
{:ok, nil, group}
end
end
def handle_incoming(%{
"type" => "Create",
"object" => %{"type" => "Member"} = object
}) do
Logger.info("Handle incoming to create a member")
with object_data when is_map(object_data) <-
object |> Converter.Member.as_to_model_data() do
Logger.debug("Produced the following model data for member")
Logger.debug(inspect(object_data))
with {:existing_member, nil} <-
{:existing_member, Actors.get_member_by_url(object_data.url)},
%Actor{type: :Group} = group <- Actors.get_actor(object_data.parent_id),
%Actor{} = actor <- Actors.get_actor(object_data.actor_id),
{:ok, %Activity{} = activity, %Member{} = member} <-
ActivityPub.join(group, actor, false, %{
url: object_data.url,
metadata: %{role: object_data.role}
}) do
{:ok, activity, member}
else
{:existing_member, %Member{} = member} ->
Logger.debug("Member already exists, updating member")
{:ok, %Member{} = member} = Actors.update_member(member, object_data)
{:ok, nil, member}
end
end
end
def handle_incoming(%{
"type" => "Create",
"object" =>
%{"type" => "Article", "actor" => _actor, "attributedTo" => _attributed_to} = object
}) do
Logger.info("Handle incoming to create articles")
with object_data when is_map(object_data) <-
object |> Converter.Post.as_to_model_data(),
{:existing_post, nil} <-
{:existing_post, Posts.get_post_by_url(object_data.url)},
{:ok, %Activity{} = activity, %Post{} = post} <-
ActivityPub.create(:post, object_data, false) do
{:ok, activity, post}
else
{:existing_post, %Post{} = post} ->
{:ok, nil, post}
end
end
# This is a hack to handle Tombstones fetched by AP
def handle_incoming(%{
"type" => "Create",
"object" => %{"type" => "Tombstone", "id" => object_url} = _object
}) do
Logger.info("Handle incoming to create a tombstone")
case ActivityPub.fetch_object_from_url(object_url, force: true) do
# We already have the tombstone, object is probably already deleted
{:ok, %Tombstone{} = tombstone} ->
{:ok, nil, tombstone}
# Hack because deleted comments
{:ok, %Comment{deleted_at: deleted_at} = comment} when not is_nil(deleted_at) ->
{:ok, nil, comment}
{:ok, entity} ->
ActivityPub.delete(entity, Relay.get_actor(), false)
end
end
def handle_incoming(
%{"type" => "Follow", "object" => followed, "actor" => follower, "id" => id} = _data
) do
with {:ok, %Actor{} = followed} <- ActivityPub.get_or_fetch_actor_by_url(followed, true),
{:ok, %Actor{} = follower} <- ActivityPub.get_or_fetch_actor_by_url(follower),
{:ok, activity, object} <- ActivityPub.follow(follower, followed, id, false) do
{:ok, activity, object}
else
e ->
Logger.warn("Unable to handle Follow activity #{inspect(e)}")
:error
end
end
def handle_incoming(%{
"type" => "Create",
"object" => %{"type" => "TodoList", "id" => object_url} = object,
"actor" => actor_url
}) do
Logger.info("Handle incoming to create a todo list")
with {:existing_todo_list, nil} <-
{:existing_todo_list, Todos.get_todo_list_by_url(object_url)},
{:ok, %Actor{url: actor_url}} <- ActivityPub.get_or_fetch_actor_by_url(actor_url),
object_data when is_map(object_data) <-
object |> Converter.TodoList.as_to_model_data(),
{:ok, %Activity{} = activity, %TodoList{} = todo_list} <-
ActivityPub.create(:todo_list, object_data, false, %{"actor" => actor_url}) do
{:ok, activity, todo_list}
else
{:error, :group_not_found} -> :error
{:existing_todo_list, %TodoList{} = todo_list} -> {:ok, nil, todo_list}
end
end
def handle_incoming(%{
"type" => "Create",
"object" => %{"type" => "Todo", "id" => object_url} = object
}) do
Logger.info("Handle incoming to create a todo")
with {:existing_todo, nil} <-
{:existing_todo, Todos.get_todo_by_url(object_url)},
object_data <-
object |> Converter.Todo.as_to_model_data(),
{:ok, %Activity{} = activity, %Todo{} = todo} <-
ActivityPub.create(:todo, object_data, false) do
{:ok, activity, todo}
else
{:existing_todo, %Todo{} = todo} -> {:ok, nil, todo}
end
end
def handle_incoming(
%{
"type" => activity_type,
"object" => %{"type" => object_type, "id" => object_url} = object
} = data
)
when activity_type in ["Create", "Add"] and
object_type in ["Document", "ResourceCollection"] do
Logger.info("Handle incoming to create a resource")
Logger.debug(inspect(data))
with {:existing_resource, nil} <-
{:existing_resource, Resources.get_resource_by_url(object_url)},
object_data when is_map(object_data) <-
object |> Converter.Resource.as_to_model_data(),
{:member, true} <-
{:member, Actors.is_member?(object_data.creator_id, object_data.actor_id)},
{:ok, %Activity{} = activity, %Resource{} = resource} <-
ActivityPub.create(:resource, object_data, false) do
{:ok, activity, resource}
else
{:existing_resource, %Resource{} = resource} ->
{:ok, nil, resource}
{:member, false} ->
# At some point this should refresh the list of group members
# if the group is not local before simply returning an error
:error
{:error, e} ->
Logger.debug(inspect(e))
:error
end
end
def handle_incoming(
%{
"type" => "Accept",
"object" => accepted_object,
"actor" => _actor,
"id" => id
} = data
) do
with actor_url <- Utils.get_actor(data),
{:ok, %Actor{} = actor} <- ActivityPub.get_or_fetch_actor_by_url(actor_url),
{:object_not_found, {:ok, %Activity{} = activity, object}} <-
{:object_not_found,
do_handle_incoming_accept_following(accepted_object, actor) ||
do_handle_incoming_accept_join(accepted_object, actor)} do
{:ok, activity, object}
else
{:object_not_found, nil} ->
Logger.warn(
"Unable to process Accept activity #{inspect(id)}. Object #{inspect(accepted_object)} wasn't found."
)
:error
e ->
Logger.warn(
"Unable to process Accept activity #{inspect(id)} for object #{inspect(accepted_object)} only returned #{
inspect(e)
}"
)
:error
end
end
def handle_incoming(
%{"type" => "Reject", "object" => rejected_object, "actor" => _actor, "id" => id} = data
) do
with actor_url <- Utils.get_actor(data),
{:ok, %Actor{} = actor} <- ActivityPub.get_or_fetch_actor_by_url(actor_url),
{:object_not_found, {:ok, activity, object}} <-
{:object_not_found,
do_handle_incoming_reject_following(rejected_object, actor) ||
do_handle_incoming_reject_join(rejected_object, actor) ||
do_handle_incoming_reject_invite(rejected_object, actor)} do
{:ok, activity, object}
else
{:object_not_found, nil} ->
Logger.warn(
"Unable to process Reject activity #{inspect(id)}. Object #{inspect(rejected_object)} wasn't found."
)
:error
e ->
Logger.warn(
"Unable to process Reject activity #{inspect(id)} for object #{inspect(rejected_object)} only returned #{
inspect(e)
}"
)
:error
end
end
def handle_incoming(
%{"type" => "Announce", "object" => object, "actor" => _actor, "id" => _id} = data
) do
with actor_url <- Utils.get_actor(data),
{:ok, %Actor{id: actor_id, suspended: false} = actor} <-
ActivityPub.get_or_fetch_actor_by_url(actor_url),
:ok <- Logger.debug("Fetching contained object"),
{:ok, entity} <- process_announce_data(object, actor),
:ok <- eventually_create_share(object, entity, actor_id) do
{:ok, nil, entity}
else
e ->
Logger.debug(inspect(e))
:error
end
end
def handle_incoming(%{
"type" => "Update",
"object" => %{"type" => object_type} = object,
"actor" => _actor_id
})
when object_type in ["Person", "Group", "Application", "Service", "Organization"] do
with {:ok, %Actor{suspended: false} = old_actor} <-
ActivityPub.get_or_fetch_actor_by_url(object["id"]),
object_data <-
object |> Converter.Actor.as_to_model_data(),
{:ok, %Activity{} = activity, %Actor{} = new_actor} <-
ActivityPub.update(old_actor, object_data, false) do
{:ok, activity, new_actor}
else
e ->
Logger.error(inspect(e))
:error
end
end
def handle_incoming(
%{"type" => "Update", "object" => %{"type" => "Event"} = object, "actor" => _actor} =
update_data
) do
with actor <- Utils.get_actor(update_data),
{:ok, %Actor{url: actor_url, suspended: false} = actor} <-
ActivityPub.get_or_fetch_actor_by_url(actor),
{:ok, %Event{} = old_event} <-
object |> Utils.get_url() |> ActivityPub.fetch_object_from_url(),
object_data <- Converter.Event.as_to_model_data(object),
{:origin_check, true} <-
{:origin_check,
Utils.origin_check?(actor_url, update_data) ||
Utils.can_update_group_object?(actor, old_event)},
{:ok, %Activity{} = activity, %Event{} = new_event} <-
ActivityPub.update(old_event, object_data, false) do
{:ok, activity, new_event}
else
_e ->
:error
end
end
def handle_incoming(
%{"type" => "Update", "object" => %{"type" => "Note"} = object, "actor" => _actor} =
update_data
) do
Logger.info("Handle incoming to update a note")
with actor <- Utils.get_actor(update_data),
{:ok, %Actor{url: actor_url, suspended: false}} <-
ActivityPub.get_or_fetch_actor_by_url(actor),
{:origin_check, true} <- {:origin_check, Utils.origin_check?(actor_url, update_data)},
object_data <- Converter.Comment.as_to_model_data(object),
{:ok, old_entity} <- object |> Utils.get_url() |> ActivityPub.fetch_object_from_url(),
object_data <- transform_object_data_for_discussion(object_data),
{:ok, %Activity{} = activity, new_entity} <-
ActivityPub.update(old_entity, object_data, false) do
{:ok, activity, new_entity}
else
_e ->
:error
end
end
def handle_incoming(
%{"type" => "Update", "object" => %{"type" => "Article"} = object, "actor" => _actor} =
update_data
) do
with actor <- Utils.get_actor(update_data),
{:ok, %Actor{url: actor_url, suspended: false} = actor} <-
ActivityPub.get_or_fetch_actor_by_url(actor),
{:ok, %Post{} = old_post} <-
object |> Utils.get_url() |> ActivityPub.fetch_object_from_url(),
object_data <- Converter.Post.as_to_model_data(object),
{:origin_check, true} <-
{:origin_check,
Utils.origin_check?(actor_url, update_data["object"]) ||
Utils.can_update_group_object?(actor, old_post)},
{:ok, %Activity{} = activity, %Post{} = new_post} <-
ActivityPub.update(old_post, object_data, false) do
{:ok, activity, new_post}
else
{:origin_check, _} ->
Logger.warn("Actor tried to update a post but doesn't has the required role")
:error
_e ->
:error
end
end
def handle_incoming(
%{"type" => "Update", "object" => %{"type" => type} = object, "actor" => _actor} =
update_data
)
when type in ["ResourceCollection", "Document"] do
with actor <- Utils.get_actor(update_data),
{:ok, %Actor{url: actor_url, suspended: false}} <-
ActivityPub.get_or_fetch_actor_by_url(actor),
{:ok, %Resource{} = old_resource} <-
object |> Utils.get_url() |> ActivityPub.fetch_object_from_url(),
object_data <- Converter.Resource.as_to_model_data(object),
{:origin_check, true} <-
{:origin_check,
Utils.origin_check?(actor_url, update_data) ||
Utils.can_update_group_object?(actor, old_resource)},
{:ok, %Activity{} = activity, %Resource{} = new_resource} <-
ActivityPub.update(old_resource, object_data, false) do
{:ok, activity, new_resource}
else
_e ->
:error
end
end
def handle_incoming(
%{"type" => "Update", "object" => %{"type" => "Member"} = object, "actor" => _actor} =
update_data
) do
Logger.info("Handle incoming to update a member")
with actor <- Utils.get_actor(update_data),
{:ok, %Actor{url: actor_url, suspended: false} = actor} <-
ActivityPub.get_or_fetch_actor_by_url(actor),
{:origin_check, true} <- {:origin_check, Utils.origin_check?(actor_url, update_data)},
object_data <- Converter.Member.as_to_model_data(object),
{:ok, old_entity} <- object |> Utils.get_url() |> ActivityPub.fetch_object_from_url(),
{:ok, %Activity{} = activity, new_entity} <-
ActivityPub.update(old_entity, object_data, false, %{moderator: actor}) do
{:ok, activity, new_entity}
else
_e ->
:error
end
end
def handle_incoming(%{
"type" => "Update",
"object" => %{"type" => "Tombstone"} = object,
"actor" => _actor
}) do
Logger.info("Handle incoming to update a tombstone")
with object_url <- Utils.get_url(object),
{:ok, entity} <- ActivityPub.fetch_object_from_url(object_url) do
ActivityPub.delete(entity, Relay.get_actor(), false)
else
{:ok, %Tombstone{} = tombstone} ->
{:ok, nil, tombstone}
end
end
def handle_incoming(
%{
"type" => "Undo",
"object" => %{
"type" => "Announce",
"object" => object_id,
"id" => cancelled_activity_id
},
"actor" => _actor,
"id" => id
} = data
) do
with actor <- Utils.get_actor(data),
{:ok, %Actor{} = actor} <- ActivityPub.get_or_fetch_actor_by_url(actor),
{:ok, object} <- fetch_obj_helper_as_activity_streams(object_id),
{:ok, activity, object} <-
ActivityPub.unannounce(actor, object, id, cancelled_activity_id, false) do
{:ok, activity, object}
else
_e -> :error
end
end
def handle_incoming(
%{
"type" => "Undo",
"object" => %{"type" => "Follow", "object" => followed},
"actor" => follower,
"id" => id
} = _data
) do
with {:ok, %Actor{domain: nil} = followed} <- ActivityPub.get_or_fetch_actor_by_url(followed),
{:ok, %Actor{} = follower} <- ActivityPub.get_or_fetch_actor_by_url(follower),
{:ok, activity, object} <- ActivityPub.unfollow(follower, followed, id, false) do
{:ok, activity, object}
else
e ->
Logger.debug(inspect(e))
:error
end
end
# We assume everyone on the same instance as the object
# or who is member of a group has the right to delete the object
def handle_incoming(
%{"type" => "Delete", "object" => object, "actor" => _actor, "id" => _id} = data
) do
with actor_url <- Utils.get_actor(data),
{:ok, %Actor{} = actor} <- ActivityPub.get_or_fetch_actor_by_url(actor_url),
object_id <- Utils.get_url(object),
{:ok, object} <- is_group_object_gone(object_id),
{:origin_check, true} <-
{:origin_check,
Utils.origin_check_from_id?(actor_url, object_id) ||
Utils.can_delete_group_object?(actor, object)},
{:ok, activity, object} <- ActivityPub.delete(object, actor, false) do
{:ok, activity, object}
else
{:origin_check, false} ->
Logger.warn("Object origin check failed")
:error
e ->
Logger.error(inspect(e))
:error
end
end
def handle_incoming(
%{"type" => "Move", "object" => %{"type" => type} = object, "actor" => _actor} = data
)
when type in ["ResourceCollection", "Document"] do
with actor <- Utils.get_actor(data),
{:ok, %Actor{url: actor_url, suspended: false} = actor} <-
ActivityPub.get_or_fetch_actor_by_url(actor),
{:ok, %Resource{} = old_resource} <-
object |> Utils.get_url() |> ActivityPub.fetch_object_from_url(),
object_data <- Converter.Resource.as_to_model_data(object),
{:origin_check, true} <-
{:origin_check,
Utils.origin_check?(actor_url, data) ||
Utils.can_update_group_object?(actor, old_resource)},
{:ok, activity, new_resource} <- ActivityPub.move(:resource, old_resource, object_data) do
{:ok, activity, new_resource}
else
e ->
Logger.error(inspect(e))
:error
end
end
def handle_incoming(
%{
"type" => "Join",
"object" => object,
"actor" => _actor,
"id" => id
} = data
) do
with actor <- Utils.get_actor(data),
{:ok, %Actor{url: _actor_url, suspended: false} = actor} <-
ActivityPub.get_or_fetch_actor_by_url(actor),
object <- Utils.get_url(object),
{:ok, object} <- ActivityPub.fetch_object_from_url(object),
{:ok, activity, object} <-
ActivityPub.join(object, actor, false, %{
url: id,
metadata: %{message: Map.get(data, "participationMessage")}
}) do
{:ok, activity, object}
else
e ->
Logger.debug(inspect(e))
:error
end
end
def handle_incoming(%{"type" => "Leave", "object" => object, "actor" => actor} = data) do
with actor <- Utils.get_actor(data),
{:ok, %Actor{} = actor} <- ActivityPub.get_or_fetch_actor_by_url(actor),
object <- Utils.get_url(object),
{:ok, object} <- ActivityPub.fetch_object_from_url(object),
{:ok, activity, object} <- ActivityPub.leave(object, actor, false) do
{:ok, activity, object}
else
{:only_organizer, true} ->
Logger.warn(
"Actor #{inspect(actor)} tried to leave event #{inspect(object)} but it was the only organizer so we didn't detach it"
)
:error
_e ->
:error
end
end
def handle_incoming(
%{
"type" => "Invite",
"object" => object,
"actor" => _actor,
"id" => id,
"target" => target
} = data
) do
Logger.info("Handle incoming to invite someone")
with {:ok, %Actor{} = actor} <-
data |> Utils.get_actor() |> ActivityPub.get_or_fetch_actor_by_url(),
{:ok, object} <- object |> Utils.get_url() |> ActivityPub.fetch_object_from_url(),
{:ok, %Actor{} = target} <-
target |> Utils.get_url() |> ActivityPub.get_or_fetch_actor_by_url(),
{:ok, activity, %Member{} = member} <-
ActivityPub.invite(object, actor, target, false, %{url: id}) do
{:ok, activity, member}
end
end
def handle_incoming(
%{"type" => "Remove", "actor" => actor, "object" => object, "origin" => origin} = data
) do
Logger.info("Handle incoming to remove a member from a group")
with {:ok, %Actor{id: moderator_id} = moderator} <-
data |> Utils.get_actor() |> ActivityPub.get_or_fetch_actor_by_url(),
{:ok, %Actor{id: person_id}} <-
object |> Utils.get_url() |> ActivityPub.get_or_fetch_actor_by_url(),
{:ok, %Actor{type: :Group, id: group_id} = group} <-
origin |> Utils.get_url() |> ActivityPub.get_or_fetch_actor_by_url(),
{:is_admin, {:ok, %Member{role: role}}}
when role in [:moderator, :administrator, :creator] <-
{:is_admin, Actors.get_member(moderator_id, group_id)},
{:is_member, {:ok, %Member{role: role} = member}} when role != :rejected <-
{:is_member, Actors.get_member(person_id, group_id)} do
ActivityPub.remove(member, group, moderator, false)
else
{:is_admin, {:ok, %Member{}}} ->
Logger.warn(
"Person #{inspect(actor)} is not an admin from #{inspect(origin)} and can't remove member #{
inspect(object)
}"
)
{:error, "Member already removed"}
{:is_member, {:ok, %Member{role: :rejected}}} ->
Logger.warn("Member #{inspect(object)} already removed from #{inspect(origin)}")
{:error, "Member already removed"}
end
end
#
# # TODO
# # Accept
# # Undo
#
# def handle_incoming(
# %{
# "type" => "Undo",
# "object" => %{"type" => "Like", "object" => object_id},
# "actor" => _actor,
# "id" => id
# } = data
# ) do
# with actor <- Utils.get_actor(data),
# %Actor{} = actor <- ActivityPub.get_or_fetch_actor_by_url(actor),
# {:ok, object} <- fetch_obj_helper(object_id) || fetch_obj_helper(object_id),
# {:ok, activity, _, _} <- ActivityPub.unlike(actor, object, id, false) do
# {:ok, activity}
# else
# _e -> :error
# end
# end
def handle_incoming(object) do
Logger.info("Handing something with type #{object["type"]} not supported")
Logger.debug(inspect(object))
{:error, :not_supported}
end
# Handle incoming `Accept` activities wrapping a `Follow` activity
defp do_handle_incoming_accept_following(follow_object, %Actor{} = actor) do
with {:follow,
{:ok, %Follower{approved: false, target_actor: followed, actor: follower} = follow}} <-
{:follow, get_follow(follow_object)},
{:same_actor, true} <- {:same_actor, actor.id == followed.id},
{:ok, %Activity{} = activity, %Follower{approved: true} = follow} <-
ActivityPub.accept(
:follow,
follow,
false
) do
relay_actor = Relay.get_actor()
# If this is an instance follow, refresh the followed profile (especially their outbox)
if follower.id == relay_actor.id do
Refresher.refresh_profile(followed)
end
{:ok, activity, follow}
else
{:follow, _} ->
Logger.debug(
"Tried to handle an Accept activity but it's not containing a Follow activity"
)
nil
{:same_actor} ->
{:error, "Actor who accepted the follow wasn't the target. Quite odd."}
{:ok, %Follower{approved: true} = _follow} ->
{:error, "Follow already accepted"}
end
end
# Handle incoming `Reject` activities wrapping a `Follow` activity
defp do_handle_incoming_reject_following(follow_object, %Actor{} = actor) do
with {:follow, {:ok, %Follower{target_actor: followed} = follow}} <-
{:follow, get_follow(follow_object)},
{:same_actor, true} <- {:same_actor, actor.id == followed.id},
{:ok, activity, _} <-
ActivityPub.reject(:follow, follow) do
{:ok, activity, follow}
else
{:follow, _err} ->
Logger.debug(
"Tried to handle a Reject activity but it's not containing a Follow activity"
)
nil
{:same_actor} ->
{:error, "Actor who rejected the follow wasn't the target. Quite odd."}
{:ok, %Follower{approved: true} = _follow} ->
{:error, "Follow already accepted"}
end
end
# Handle incoming `Accept` activities wrapping a `Join` activity on an event
defp do_handle_incoming_accept_join(join_object, %Actor{} = actor_accepting) do
case get_participant(join_object) do
{:ok, participant} ->
do_handle_incoming_accept_join_event(participant, actor_accepting)
{:error, _err} ->
case get_member(join_object) do
{:ok, %Member{invited_by: nil} = member} ->
do_handle_incoming_accept_join_group(member, :join)
{:ok, %Member{} = member} ->
do_handle_incoming_accept_join_group(member, :invite)
{:error, _err} ->
nil
end
end
end
defp do_handle_incoming_accept_join_event(%Participant{role: :participant}, _actor) do
Logger.debug(
"Tried to handle an Accept activity on a Join activity with a event object but the participant is already validated"
)
nil
end
defp do_handle_incoming_accept_join_event(
%Participant{role: role, event: event} = participant,
%Actor{} = actor_accepting
)
when role in [:not_approved, :rejected] do
# TODO: The actor that accepts the Join activity may another one that the event organizer ?
# Or maybe for groups it's the group that sends the Accept activity
with {:same_actor, true} <- {:same_actor, actor_accepting.id == event.organizer_actor_id},
{:ok, %Activity{} = activity, %Participant{role: :participant} = participant} <-
ActivityPub.accept(
:join,
participant,
false
),
:ok <-
Participation.send_emails_to_local_user(participant) do
{:ok, activity, participant}
else
{:same_actor} ->
{:error, "Actor who accepted the join wasn't the event organizer. Quite odd."}
{:ok, %Participant{role: :participant} = _follow} ->
{:error, "Participant"}
end
end
defp do_handle_incoming_accept_join_group(%Member{role: :member}, _type) do
Logger.debug(
"Tried to handle an Accept activity on a Join activity with a group object but the member is already validated"
)
nil
end
defp do_handle_incoming_accept_join_group(
%Member{role: role, parent: _group} = member,
type
)
when role in [:not_approved, :rejected, :invited] and type in [:join, :invite] do
# TODO: The actor that accepts the Join activity may another one that the event organizer ?
# Or maybe for groups it's the group that sends the Accept activity
with {:ok, %Activity{} = activity, %Member{role: :member} = member} <-
ActivityPub.accept(
type,
member,
false
) do
{:ok, activity, member}
end
end
# Handle incoming `Reject` activities wrapping a `Join` activity on an event
defp do_handle_incoming_reject_join(join_object, %Actor{} = actor_accepting) do
with {:join_event, {:ok, %Participant{event: event, role: role} = participant}}
when role != :rejected <-
{:join_event, get_participant(join_object)},
# TODO: The actor that accepts the Join activity may another one that the event organizer ?
# Or maybe for groups it's the group that sends the Accept activity
{:same_actor, true} <- {:same_actor, actor_accepting.id == event.organizer_actor_id},
{:ok, activity, participant} <-
ActivityPub.reject(:join, participant, false),
:ok <- Participation.send_emails_to_local_user(participant) do
{:ok, activity, participant}
else
{:join_event, {:ok, %Participant{role: :rejected}}} ->
Logger.warn(
"Tried to handle an Reject activity on a Join activity with a event object but the participant is already rejected"
)
nil
{:join_event, _err} ->
Logger.debug(
"Tried to handle an Reject activity but it's not containing a Join activity on a event"
)
nil
{:same_actor} ->
{:error, "Actor who rejected the join wasn't the event organizer. Quite odd."}
{:ok, %Participant{role: :participant} = _follow} ->
{:error, "Participant"}
end
end
defp do_handle_incoming_reject_invite(invite_object, %Actor{} = actor_rejecting) do
with {:invite, {:ok, %Member{role: :invited, actor_id: actor_id} = member}} <-
{:invite, get_member(invite_object)},
{:same_actor, true} <- {:same_actor, actor_rejecting.id === actor_id},
{:ok, activity, member} <-
ActivityPub.reject(:invite, member, false) do
{:ok, activity, member}
end
end
# If the object has been announced by a group let's use one of our members to fetch it
@spec fetch_object_optionnally_authenticated(String.t(), Actor.t() | any()) ::
{:ok, struct()} | {:error, any()}
defp fetch_object_optionnally_authenticated(url, %Actor{type: :Group, id: group_id}) do
case Actors.get_single_group_member_actor(group_id) do
%Actor{} = actor ->
ActivityPub.fetch_object_from_url(url, on_behalf_of: actor, force: true)
_err ->
fetch_object_optionnally_authenticated(url, nil)
end
end
defp fetch_object_optionnally_authenticated(url, _),
do: ActivityPub.fetch_object_from_url(url, force: true)
defp eventually_create_share(object, entity, actor_id) do
with object_id <- object |> Utils.get_url(),
%Actor{id: object_owner_actor_id} <- Ownable.actor(entity) do
{:ok, %Mobilizon.Share{} = _share} =
Mobilizon.Share.create(object_id, actor_id, object_owner_actor_id)
end
:ok
end
# Comment initiates a whole discussion only if it has full title
@spec is_data_for_comment_or_discussion?(map()) :: boolean()
defp is_data_for_comment_or_discussion?(object_data) do
is_data_a_discussion_initialization?(object_data) and
is_nil(object_data.discussion_id)
end
# Comment initiates a whole discussion only if it has full title
@spec is_data_for_comment_or_discussion?(map()) :: boolean()
defp is_data_a_discussion_initialization?(object_data) do
not Map.has_key?(object_data, :title) or
is_nil(object_data.title) or object_data.title == ""
end
# Comment and conversations have different attributes for actor and groups
defp transform_object_data_for_discussion(object_data) do
# Basic comment
if is_data_a_discussion_initialization?(object_data) do
object_data
else
# Conversation
object_data
|> Map.put(:creator_id, object_data.actor_id)
|> Map.put(:actor_id, object_data.attributed_to_id)
end
end
defp get_follow(follow_object) do
with follow_object_id when not is_nil(follow_object_id) <- Utils.get_url(follow_object),
{:not_found, %Follower{} = follow} <-
{:not_found, Actors.get_follower_by_url(follow_object_id)} do
{:ok, follow}
else
{:not_found, _err} ->
{:error, "Follow URL not found"}
_ ->
{:error, "ActivityPub ID not found in Accept Follow object"}
end
end
defp get_participant(join_object) do
with join_object_id when not is_nil(join_object_id) <- Utils.get_url(join_object),
{:not_found, %Participant{} = participant} <-
{:not_found, Events.get_participant_by_url(join_object_id)} do
{:ok, participant}
else
{:not_found, _err} ->
{:error, "Participant URL not found"}
_ ->
{:error, "ActivityPub ID not found in Accept Join object"}
end
end
@spec get_member(String.t() | map()) :: {:ok, Member.t()} | {:error, String.t()}
defp get_member(member_object) do
with member_object_id when not is_nil(member_object_id) <- Utils.get_url(member_object),
%Member{} = member <-
Actors.get_member_by_url(member_object_id) do
{:ok, member}
else
{:error, :member_not_found} ->
{:error, "Member URL not found"}
_ ->
{:error, "ActivityPub ID not found in Accept Join object"}
end
end
def prepare_outgoing(%{"type" => _type} = data) do
data =
data
|> Map.merge(Utils.make_json_ld_header())
{:ok, data}
end
@spec fetch_obj_helper(map() | String.t()) :: Event.t() | Comment.t() | Actor.t() | any()
def fetch_obj_helper(object) do
Logger.debug("fetch_obj_helper")
Logger.debug("Fetching object #{inspect(object)}")
case object |> Utils.get_url() |> ActivityPub.fetch_object_from_url() do
{:ok, object} ->
{:ok, object}
err ->
Logger.warn("Error while fetching #{inspect(object)}")
{:error, err}
end
end
def fetch_obj_helper_as_activity_streams(object) do
Logger.debug("fetch_obj_helper_as_activity_streams")
with {:ok, object} <- fetch_obj_helper(object) do
{:ok, Convertible.model_to_as(object)}
end
end
# Otherwise we need to fetch what's at the URL (this is possible only for objects, not activities)
defp process_announce_data(%{"id" => url}, %Actor{} = actor),
do: process_announce_data(url, actor)
defp process_announce_data(url, %Actor{} = actor) do
if Utils.are_same_origin?(url, Endpoint.url()) do
ActivityPub.fetch_object_from_url(url, force: false)
else
fetch_object_optionnally_authenticated(url, actor)
end
end
defp is_group_object_gone(object_id) do
case ActivityPub.fetch_object_from_url(object_id, force: true) do
{:error, error_message, object} when error_message in ["Gone", "Not found"] ->
{:ok, object}
{:ok, %{url: url} = object} ->
if Utils.are_same_origin?(url, Endpoint.url()),
do: {:ok, object},
else: {:error, "Group object URL remote"}
{:error, {:error, err}} ->
{:error, err}
{:error, err} ->
{:error, err}
err ->
err
end
end
end