mobilizon.chapril.org-mobil.../lib/federation/activity_pub/activity_pub.ex
Thomas Citharel 5990633fb9
Use ActivityPub.get_or_fetch_actor_by_url/2 instead of
directly Actors.get_actor_by_url

So that we can refresh actors when they're stale

Signed-off-by: Thomas Citharel <tcit@tcit.fr>
2020-06-15 11:45:58 +02:00

1389 lines
49 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/activity_pub.ex
defmodule Mobilizon.Federation.ActivityPub do
@moduledoc """
The ActivityPub context.
"""
import Mobilizon.Federation.ActivityPub.Utils
alias Mobilizon.{
Actors,
Config,
Conversations,
Events,
Reports,
Resources,
Share,
Todos,
Users
}
alias Mobilizon.Actors.{Actor, Follower, Member}
alias Mobilizon.Conversations.Comment
alias Mobilizon.Events.{Event, Participant}
alias Mobilizon.Reports.Report
alias Mobilizon.Resources.Resource
alias Mobilizon.Todos.{Todo, TodoList}
alias Mobilizon.Tombstone
alias Mobilizon.Federation.ActivityPub.{
Activity,
Audience,
Federator,
Relay,
Transmogrifier,
Visibility
}
alias Mobilizon.Federation.ActivityStream.{Converter, Convertible}
alias Mobilizon.Federation.ActivityStream.Converter.Utils, as: ConverterUtils
alias Mobilizon.Federation.HTTPSignatures.Signature
alias Mobilizon.Federation.WebFinger
alias Mobilizon.GraphQL.API.Utils, as: APIUtils
alias Mobilizon.Service.Notifications.Scheduler
alias Mobilizon.Service.RichMedia.Parser
alias Mobilizon.Web.Endpoint
alias Mobilizon.Web.Email.{Admin, Mailer}
require Logger
@doc """
Wraps an object into an activity
"""
@spec create_activity(map(), boolean()) :: {:ok, Activity.t()}
def create_activity(map, local \\ true) when is_map(map) do
with map <- lazy_put_activity_defaults(map) do
{:ok,
%Activity{
data: map,
local: local,
actor: map["actor"],
recipients: get_recipients(map)
}}
end
end
@doc """
Fetch an object from an URL, from our local database of events and comments, then eventually remote
"""
# TODO: Make database calls parallel
@spec fetch_object_from_url(String.t()) :: {:ok, %Event{}} | {:ok, %Comment{}} | {:error, any()}
def fetch_object_from_url(url) do
Logger.info("Fetching object from url #{url}")
with {:not_http, true} <- {:not_http, String.starts_with?(url, "http")},
{:existing_event, nil} <- {:existing_event, Events.get_event_by_url(url)},
{:existing_comment, nil} <- {:existing_comment, Conversations.get_comment_from_url(url)},
{:existing_resource, nil} <- {:existing_resource, Resources.get_resource_by_url(url)},
{:existing_actor, {:error, :actor_not_found}} <-
{:existing_actor, Actors.get_actor_by_url(url)},
date <- Signature.generate_date_header(),
headers <-
[{:Accept, "application/activity+json"}]
|> maybe_date_fetch(date)
|> sign_fetch_relay(url, date),
{:ok, %HTTPoison.Response{body: body, status_code: code}} when code in 200..299 <-
HTTPoison.get(
url,
headers,
follow_redirect: true,
timeout: 10_000,
recv_timeout: 20_000,
ssl: [{:versions, [:"tlsv1.2"]}]
),
{:ok, data} <- Jason.decode(body),
{:origin_check, true} <- {:origin_check, origin_check?(url, data)},
params <- %{
"type" => "Create",
"to" => data["to"],
"cc" => data["cc"],
"actor" => data["attributedTo"],
"object" => data
},
{:ok, _activity, %{url: object_url} = _object} <- Transmogrifier.handle_incoming(params) do
case data["type"] do
"Event" ->
{:ok, Events.get_public_event_by_url_with_preload!(object_url)}
"Note" ->
{:ok, Conversations.get_comment_from_url_with_preload!(object_url)}
"Document" ->
{:ok, Resources.get_resource_by_url_with_preloads(object_url)}
"ResourceCollection" ->
{:ok, Resources.get_resource_by_url_with_preloads(object_url)}
"Actor" ->
{:ok, Actors.get_actor_by_url!(object_url, true)}
other ->
{:error, other}
end
else
{:existing_event, %Event{url: event_url}} ->
{:ok, Events.get_public_event_by_url_with_preload!(event_url)}
{:existing_comment, %Comment{url: comment_url}} ->
{:ok, Conversations.get_comment_from_url_with_preload!(comment_url)}
{:existing_resource, %Resource{url: resource_url}} ->
{:ok, Resources.get_resource_by_url_with_preloads(resource_url)}
{:existing_actor, {:ok, %Actor{url: actor_url}}} ->
{:ok, Actors.get_actor_by_url!(actor_url, true)}
{:origin_check, false} ->
Logger.warn("Object origin check failed")
{:error, "Object origin check failed"}
e ->
Logger.warn("Something failed while fetching url #{inspect(e)}")
{:error, e}
end
end
@doc """
Getting an actor from url, eventually creating it if we don't have it locally or if it needs an update
"""
@spec get_or_fetch_actor_by_url(String.t(), boolean) :: {:ok, Actor.t()} | {:error, String.t()}
def get_or_fetch_actor_by_url(url, preload \\ false)
def get_or_fetch_actor_by_url(nil, _preload), do: {:error, "Can't fetch a nil url"}
def get_or_fetch_actor_by_url("https://www.w3.org/ns/activitystreams#Public", _preload) do
with %Actor{url: url} <- Relay.get_actor() do
get_or_fetch_actor_by_url(url)
end
end
@spec get_or_fetch_actor_by_url(String.t(), boolean()) :: {:ok, Actor.t()} | {:error, any()}
def get_or_fetch_actor_by_url(url, preload) do
with {:ok, %Actor{} = cached_actor} <- Actors.get_actor_by_url(url, preload),
false <- Actors.needs_update?(cached_actor) do
{:ok, cached_actor}
else
_ ->
# For tests, see https://github.com/jjh42/mock#not-supported---mocking-internal-function-calls and Mobilizon.Federation.ActivityPubTest
case __MODULE__.make_actor_from_url(url, preload) do
{:ok, %Actor{} = actor} ->
{:ok, actor}
err ->
Logger.warn("Could not fetch by AP id")
Logger.debug(inspect(err))
{:error, "Could not fetch by AP id"}
end
end
end
@doc """
Create an activity of type `Create`
* Creates the object, which returns AS data
* Wraps ActivityStreams data into a `Create` activity
* Creates an `Mobilizon.Federation.ActivityPub.Activity` from this
* Federates (asynchronously) the activity
* Returns the activity
"""
@spec create(atom(), map(), boolean, map()) :: {:ok, Activity.t(), struct()} | any()
def create(type, args, local \\ false, additional \\ %{}) do
Logger.debug("creating an activity")
Logger.debug(inspect(args))
with {:tombstone, nil} <- {:tombstone, check_for_tombstones(args)},
{:ok, entity, create_data} <-
(case type do
:event -> create_event(args, additional)
:comment -> create_comment(args, additional)
:group -> create_group(args, additional)
:todo_list -> create_todo_list(args, additional)
:todo -> create_todo(args, additional)
:resource -> create_resource(args, additional)
end),
{:ok, activity} <- create_activity(create_data, local),
:ok <- maybe_federate(activity) do
{:ok, activity, entity}
else
err ->
Logger.error("Something went wrong while creating an activity")
err
end
end
@doc """
Create an activity of type `Update`
* Updates the object, which returns AS data
* Wraps ActivityStreams data into a `Update` activity
* Creates an `Mobilizon.Federation.ActivityPub.Activity` from this
* Federates (asynchronously) the activity
* Returns the activity
"""
@spec update(atom(), struct(), map(), boolean, map()) :: {:ok, Activity.t(), struct()} | any()
def update(type, old_entity, args, local \\ false, additional \\ %{}) do
Logger.debug("updating an activity")
Logger.debug(inspect(args))
with {:ok, entity, update_data} <-
(case type do
:event -> update_event(old_entity, args, additional)
:comment -> update_comment(old_entity, args, additional)
:actor -> update_actor(old_entity, args, additional)
:todo -> update_todo(old_entity, args, additional)
:resource -> update_resource(old_entity, args, additional)
end),
{:ok, activity} <- create_activity(update_data, local),
:ok <- maybe_federate(activity) do
{:ok, activity, entity}
else
err ->
Logger.error("Something went wrong while creating an activity")
Logger.debug(inspect(err))
err
end
end
def accept(type, entity, local \\ true, additional \\ %{}) do
Logger.debug("We're accepting something")
{:ok, entity, update_data} =
case type do
:join -> accept_join(entity, additional)
:follow -> accept_follow(entity, additional)
:invite -> accept_invite(entity, additional)
end
with {:ok, activity} <- create_activity(update_data, local),
:ok <- maybe_federate(activity) do
{:ok, activity, entity}
else
err ->
Logger.error("Something went wrong while creating an activity")
Logger.debug(inspect(err))
err
end
end
def reject(type, entity, local \\ true, additional \\ %{}) do
{:ok, entity, update_data} =
case type do
:join -> reject_join(entity, additional)
:follow -> reject_follow(entity, additional)
end
with {:ok, activity} <- create_activity(update_data, local),
:ok <- maybe_federate(activity) do
{:ok, activity, entity}
else
err ->
Logger.error("Something went wrong while creating an activity")
Logger.debug(inspect(err))
err
end
end
def announce(
%Actor{} = actor,
object,
activity_id \\ nil,
local \\ true,
public \\ true
) do
with {:ok, %Actor{id: object_owner_actor_id}} <- get_or_fetch_actor_by_url(object["actor"]),
{:ok, %Share{} = _share} <- Share.create(object["id"], actor.id, object_owner_actor_id),
announce_data <- make_announce_data(actor, object, activity_id, public),
{:ok, activity} <- create_activity(announce_data, local),
:ok <- maybe_federate(activity) do
{:ok, activity, object}
else
error ->
{:error, error}
end
end
def unannounce(
%Actor{} = actor,
object,
activity_id \\ nil,
cancelled_activity_id \\ nil,
local \\ true
) do
with announce_activity <- make_announce_data(actor, object, cancelled_activity_id),
unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
{:ok, unannounce_activity} <- create_activity(unannounce_data, local),
:ok <- maybe_federate(unannounce_activity) do
{:ok, unannounce_activity, object}
else
_e -> {:ok, object}
end
end
@doc """
Make an actor follow another
"""
def follow(%Actor{} = follower, %Actor{} = followed, activity_id \\ nil, local \\ true) do
with {:ok, %Follower{} = follower} <-
Actors.follow(followed, follower, activity_id, false),
follower_as_data <- Convertible.model_to_as(follower),
{:ok, activity} <- create_activity(follower_as_data, local),
:ok <- maybe_federate(activity) do
{:ok, activity, follower}
else
{:error, err, msg} when err in [:already_following, :suspended] ->
{:error, msg}
end
end
@doc """
Make an actor unfollow another
"""
@spec unfollow(Actor.t(), Actor.t(), String.t(), boolean()) :: {:ok, map()} | any()
def unfollow(%Actor{} = follower, %Actor{} = followed, activity_id \\ nil, local \\ true) do
with {:ok, %Follower{id: follow_id} = follow} <- Actors.unfollow(followed, follower),
# We recreate the follow activity
follow_as_data <-
Convertible.model_to_as(%{follow | actor: follower, target_actor: followed}),
{:ok, follow_activity} <- create_activity(follow_as_data, local),
activity_unfollow_id <-
activity_id || "#{Endpoint.url()}/unfollow/#{follow_id}/activity",
unfollow_data <-
make_unfollow_data(follower, followed, follow_activity, activity_unfollow_id),
{:ok, activity} <- create_activity(unfollow_data, local),
:ok <- maybe_federate(activity) do
{:ok, activity, follow}
else
err ->
Logger.debug("Error while unfollowing an actor #{inspect(err)}")
err
end
end
def delete(object, local \\ true)
@spec delete(Event.t(), boolean) :: {:ok, Activity.t(), Event.t()}
def delete(%Event{url: url, organizer_actor: actor} = event, local) do
data = %{
"type" => "Delete",
"actor" => actor.url,
"object" => url,
"to" => [actor.url <> "/followers", "https://www.w3.org/ns/activitystreams#Public"],
"id" => url <> "/delete"
}
with audience <-
Audience.calculate_to_and_cc_from_mentions(event),
{:ok, %Event{} = event} <- Events.delete_event(event),
{:ok, true} <- Cachex.del(:activity_pub, "event_#{event.uuid}"),
{:ok, %Tombstone{} = _tombstone} <-
Tombstone.create_tombstone(%{uri: event.url, actor_id: actor.id}),
Share.delete_all_by_uri(event.url),
:ok <- check_for_actor_key_rotation(actor),
{:ok, activity} <- create_activity(Map.merge(data, audience), local),
:ok <- maybe_federate(activity) do
{:ok, activity, event}
end
end
@spec delete(Comment.t(), boolean) :: {:ok, Activity.t(), Comment.t()}
def delete(%Comment{url: url, actor: actor} = comment, local) do
data = %{
"type" => "Delete",
"actor" => actor.url,
"object" => url,
"id" => url <> "/delete",
"to" => [actor.url <> "/followers", "https://www.w3.org/ns/activitystreams#Public"]
}
with audience <-
Audience.calculate_to_and_cc_from_mentions(comment),
{:ok, %Comment{} = comment} <- Conversations.delete_comment(comment),
{:ok, true} <- Cachex.del(:activity_pub, "comment_#{comment.uuid}"),
{:ok, %Tombstone{} = _tombstone} <-
Tombstone.create_tombstone(%{uri: comment.url, actor_id: actor.id}),
Share.delete_all_by_uri(comment.url),
:ok <- check_for_actor_key_rotation(actor),
{:ok, activity} <- create_activity(Map.merge(data, audience), local),
:ok <- maybe_federate(activity) do
{:ok, activity, comment}
end
end
def delete(%Actor{url: url} = actor, local) do
data = %{
"type" => "Delete",
"actor" => url,
"object" => url,
"id" => url <> "/delete",
"to" => [url <> "/followers", "https://www.w3.org/ns/activitystreams#Public"]
}
# We completely delete the actor if activity is remote
with {:ok, %Oban.Job{}} <- Actors.delete_actor(actor, reserve_username: local),
{:ok, activity} <- create_activity(data, local),
:ok <- maybe_federate(activity) do
{:ok, activity, actor}
end
end
def delete(
%Resource{url: url, actor: %Actor{url: actor_url}} = resource,
local
) do
Logger.debug("Building Delete Resource activity")
data = %{
"actor" => actor_url,
"type" => "Delete",
"object" => url,
"id" => url <> "/delete",
"to" => [actor_url]
}
Logger.debug(inspect(data))
with {:ok, _resource} <- Resources.delete_resource(resource),
{:ok, true} <- Cachex.del(:activity_pub, "resource_#{resource.id}"),
{:ok, activity} <- create_activity(data, local),
:ok <- maybe_federate(activity) do
{:ok, activity, resource}
end
end
def flag(args, local \\ false, _additional \\ %{}) do
with {:build_args, args} <- {:build_args, prepare_args_for_report(args)},
{:create_report, {:ok, %Report{} = report}} <-
{:create_report, Reports.create_report(args)},
report_as_data <- Convertible.model_to_as(report),
cc <- if(local, do: [report.reported.url], else: []),
report_as_data <- Map.merge(report_as_data, %{"to" => [], "cc" => cc}),
{:ok, activity} <- create_activity(report_as_data, local),
:ok <- maybe_federate(activity) do
Enum.each(Users.list_moderators(), fn moderator ->
moderator
|> Admin.report(report)
|> Mailer.deliver_later()
end)
{:ok, activity, report}
else
err ->
Logger.error("Something went wrong while creating an activity")
Logger.debug(inspect(err))
err
end
end
def join(object, actor, local \\ true, additional \\ %{})
def join(%Event{} = event, %Actor{} = actor, local, additional) do
# TODO Refactor me for federation
with {:maximum_attendee_capacity, true} <-
{:maximum_attendee_capacity, check_attendee_capacity(event)},
role <-
additional
|> Map.get(:metadata, %{})
|> Map.get(:role, Mobilizon.Events.get_default_participant_role(event)),
{:ok, %Participant{} = participant} <-
Mobilizon.Events.create_participant(%{
role: role,
event_id: event.id,
actor_id: actor.id,
url: Map.get(additional, :url),
metadata:
additional
|> Map.get(:metadata, %{})
|> Map.update(:message, nil, &String.trim(HtmlSanitizeEx.strip_tags(&1)))
}),
join_data <- Convertible.model_to_as(participant),
audience <-
Audience.calculate_to_and_cc_from_mentions(participant),
{:ok, activity} <- create_activity(Map.merge(join_data, audience), local),
:ok <- maybe_federate(activity) do
if event.local do
cond do
Mobilizon.Events.get_default_participant_role(event) === :participant &&
role == :participant ->
accept(
:join,
participant,
true,
%{"actor" => event.organizer_actor.url}
)
Mobilizon.Events.get_default_participant_role(event) === :not_approved &&
role == :not_approved ->
Scheduler.pending_participation_notification(event)
{:ok, activity, participant}
true ->
{:ok, activity, participant}
end
else
{:ok, activity, participant}
end
end
end
# TODO: Implement me
def join(%Actor{type: :Group} = _group, %Actor{} = _actor, _local, _additional) do
:error
end
defp check_attendee_capacity(%Event{options: options} = event) do
with maximum_attendee_capacity <-
Map.get(options, :maximum_attendee_capacity) || 0 do
maximum_attendee_capacity == 0 ||
Mobilizon.Events.count_participant_participants(event.id) < maximum_attendee_capacity
end
end
def leave(object, actor, local \\ true, additional \\ %{})
# TODO: If we want to use this for exclusion we need to have an extra field
# for the actor that excluded the participant
def leave(
%Event{id: event_id, url: event_url} = _event,
%Actor{id: actor_id, url: actor_url} = _actor,
local,
additional
) do
with {:only_organizer, false} <-
{:only_organizer, Participant.is_not_only_organizer(event_id, actor_id)},
{:ok, %Participant{} = participant} <-
Mobilizon.Events.get_participant(
event_id,
actor_id,
Map.get(additional, :metadata, %{})
),
{:ok, %Participant{} = participant} <-
Events.delete_participant(participant),
leave_data <- %{
"type" => "Leave",
# If it's an exclusion it should be something else
"actor" => actor_url,
"object" => event_url,
"id" => "#{Endpoint.url()}/leave/event/#{participant.id}"
},
audience <-
Audience.calculate_to_and_cc_from_mentions(participant),
{:ok, activity} <- create_activity(Map.merge(leave_data, audience), local),
:ok <- maybe_federate(activity) do
{:ok, activity, participant}
end
end
@spec invite(Actor.t(), Actor.t(), Actor.t(), boolean, map()) ::
{:ok, map(), Member.t()} | {:error, :member_not_found}
def invite(
%Actor{url: group_url, id: group_id} = group,
%Actor{url: actor_url, id: actor_id} = actor,
%Actor{url: target_actor_url, id: target_actor_id} = _target_actor,
local \\ true,
additional \\ %{}
) do
Logger.debug("Handling #{actor_url} invite to #{group_url} sent to #{target_actor_url}")
with {:is_able_to_invite, true} <- {:is_able_to_invite, is_able_to_invite(actor, group)},
{:ok, %Member{url: member_url} = member} <-
Actors.create_member(%{
parent_id: group_id,
actor_id: target_actor_id,
role: :invited,
invited_by_id: actor_id,
url: Map.get(additional, :url)
}),
invite_data <- %{
"type" => "Invite",
"actor" => actor_url,
"object" => group_url,
"target" => target_actor_url,
"id" => member_url
},
{:ok, activity} <-
create_activity(
invite_data
|> Map.merge(%{"to" => [target_actor_url], "cc" => [group_url]})
|> Map.merge(additional),
local
),
:ok <- maybe_federate(activity) do
{:ok, activity, member}
end
end
defp is_able_to_invite(%Actor{domain: actor_domain, id: actor_id}, %Actor{
domain: group_domain,
id: group_id
}) do
# If the actor comes from the same domain we trust it
if actor_domain == group_domain do
true
else
# If local group, we'll send the invite
with {:ok, %Member{} = admin_member} <- Actors.get_member(actor_id, group_id) do
Member.is_administrator(admin_member)
end
end
end
def move(type, old_entity, args, local \\ false, additional \\ %{}) do
Logger.debug("We're moving something")
Logger.debug(inspect(args))
with {:ok, entity, update_data} <-
(case type do
:resource -> move_resource(old_entity, args, additional)
end),
{:ok, activity} <- create_activity(update_data, local),
:ok <- maybe_federate(activity) do
{:ok, activity, entity}
else
err ->
Logger.error("Something went wrong while creating a Move activity")
Logger.debug(inspect(err))
err
end
end
@doc """
Create an actor locally by its URL (AP ID)
"""
@spec make_actor_from_url(String.t(), boolean()) :: {:ok, %Actor{}} | {:error, any()}
def make_actor_from_url(url, preload \\ false) do
case fetch_and_prepare_actor_from_url(url) do
{:ok, data} ->
Actors.upsert_actor(data, preload)
# Request returned 410
{:error, :actor_deleted} ->
Logger.info("Actor was deleted")
{:error, :actor_deleted}
e ->
Logger.warn("Failed to make actor from url")
{:error, e}
end
end
@doc """
Find an actor in our local database or call WebFinger to find what's its AP ID is and then fetch it
"""
@spec find_or_make_actor_from_nickname(String.t(), atom() | nil) :: tuple()
def find_or_make_actor_from_nickname(nickname, type \\ nil) do
case Actors.get_actor_by_name(nickname, type) do
%Actor{} = actor ->
{:ok, actor}
nil ->
make_actor_from_nickname(nickname)
end
end
@spec find_or_make_person_from_nickname(String.t()) :: tuple()
def find_or_make_person_from_nickname(nick), do: find_or_make_actor_from_nickname(nick, :Person)
@spec find_or_make_group_from_nickname(String.t()) :: tuple()
def find_or_make_group_from_nickname(nick), do: find_or_make_actor_from_nickname(nick, :Group)
@doc """
Create an actor inside our database from username, using WebFinger to find out its AP ID and then fetch it
"""
@spec make_actor_from_nickname(String.t()) :: {:ok, %Actor{}} | {:error, any()}
def make_actor_from_nickname(nickname) do
case WebFinger.finger(nickname) do
{:ok, %{"url" => url}} when not is_nil(url) ->
make_actor_from_url(url)
_e ->
{:error, "No ActivityPub URL found in WebFinger"}
end
end
@spec is_create_activity?(Activity.t()) :: boolean
defp is_create_activity?(%Activity{data: %{"type" => "Create"}}), do: true
defp is_create_activity?(_), do: false
@spec is_announce_activity?(Activity.t()) :: boolean
defp is_announce_activity?(%Activity{data: %{"type" => "Announce"}}), do: true
defp is_announce_activity?(_), do: false
@doc """
Publish an activity to all appropriated audiences inboxes
"""
# credo:disable-for-lines:47
@spec publish(Actor.t(), Activity.t()) :: :ok
def publish(actor, activity) do
Logger.debug("Publishing an activity")
Logger.debug(inspect(activity))
public = Visibility.is_public?(activity)
Logger.debug("is public ? #{public}")
if public && is_create_activity?(activity) && Config.get([:instance, :allow_relay]) do
Logger.info(fn -> "Relaying #{activity.data["id"]} out" end)
Relay.publish(activity)
end
followers =
if actor.followers_url in activity.recipients do
Actors.list_external_followers_for_actor(actor)
else
[]
end
# If we want to send to all members of the group, because this server is the one the group is on
members =
if is_announce_activity?(activity) and actor.type == :Group and
actor.members_url in activity.recipients and is_nil(actor.domain) do
Actors.list_external_members_for_group(actor)
else
[]
end
remote_inboxes =
(remote_actors(activity) ++ followers ++ members)
|> Enum.map(fn follower -> follower.shared_inbox_url || follower.inbox_url end)
|> Enum.uniq()
{:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
json = Jason.encode!(data)
Logger.debug(fn -> "Remote inboxes are : #{inspect(remote_inboxes)}" end)
Enum.each(remote_inboxes, fn inbox ->
Federator.enqueue(:publish_single_ap, %{
inbox: inbox,
json: json,
actor: actor,
id: activity.data["id"]
})
end)
end
@doc """
Publish an activity to a specific inbox
"""
def publish_one(%{inbox: inbox, json: json, actor: actor, id: id}) do
Logger.info("Federating #{id} to #{inbox}")
%URI{host: host, path: path} = URI.parse(inbox)
digest = Signature.build_digest(json)
date = Signature.generate_date_header()
# request_target = Signature.generate_request_target("POST", path)
signature =
Signature.sign(actor, %{
"(request-target)": "post #{path}",
host: host,
"content-length": byte_size(json),
digest: digest,
date: date
})
HTTPoison.post(
inbox,
json,
[
{"Content-Type", "application/activity+json"},
{"signature", signature},
{"digest", digest},
{"date", date}
],
hackney: [pool: :default]
)
end
# Fetching a remote actor's information through its AP ID
@spec fetch_and_prepare_actor_from_url(String.t()) :: {:ok, struct()} | {:error, atom()} | any()
defp fetch_and_prepare_actor_from_url(url) do
Logger.debug("Fetching and preparing actor from url")
Logger.debug(inspect(url))
res =
with {:ok, %HTTPoison.Response{status_code: 200, body: body}} <-
HTTPoison.get(url, [Accept: "application/activity+json"],
follow_redirect: true,
ssl: [{:versions, [:"tlsv1.2"]}]
),
:ok <- Logger.debug("response okay, now decoding json"),
{:ok, data} <- Jason.decode(body) do
Logger.debug("Got activity+json response at actor's endpoint, now converting data")
{:ok, Converter.Actor.as_to_model_data(data)}
else
# Actor is gone, probably deleted
{:ok, %HTTPoison.Response{status_code: 410}} ->
Logger.info("Response HTTP 410")
{:error, :actor_deleted}
e ->
Logger.warn("Could not decode actor at fetch #{url}, #{inspect(e)}")
{:error, e}
end
res
end
@doc """
Return all public activities (events & comments) for an actor
"""
@spec fetch_public_activities_for_actor(Actor.t(), integer(), integer()) :: map()
def fetch_public_activities_for_actor(%Actor{} = actor, page \\ 1, limit \\ 10) do
{:ok, events, total_events} = Events.list_public_events_for_actor(actor, page, limit)
{:ok, comments, total_comments} =
Conversations.list_public_comments_for_actor(actor, page, limit)
event_activities = Enum.map(events, &event_to_activity/1)
comment_activities = Enum.map(comments, &comment_to_activity/1)
activities = event_activities ++ comment_activities
%{elements: activities, total: total_events + total_comments}
end
# Create an activity from an event
@spec event_to_activity(%Event{}, boolean()) :: Activity.t()
defp event_to_activity(%Event{} = event, local \\ true) do
%Activity{
recipients: ["https://www.w3.org/ns/activitystreams#Public"],
actor: event.organizer_actor.url,
data: Converter.Event.model_to_as(event),
local: local
}
end
# Create an activity from a comment
@spec comment_to_activity(%Comment{}, boolean()) :: Activity.t()
defp comment_to_activity(%Comment{} = comment, local \\ true) do
%Activity{
recipients: ["https://www.w3.org/ns/activitystreams#Public"],
actor: comment.actor.url,
data: Converter.Comment.model_to_as(comment),
local: local
}
end
# Get recipients for an activity or object
@spec get_recipients(map()) :: list()
defp get_recipients(data) do
Map.get(data, "to", []) ++ Map.get(data, "cc", [])
end
@spec create_event(map(), map()) :: {:ok, map()}
defp create_event(args, additional) do
with args <- prepare_args_for_event(args),
{:ok, %Event{} = event} <- Events.create_event(args),
event_as_data <- Convertible.model_to_as(event),
audience <-
Audience.calculate_to_and_cc_from_mentions(event),
create_data <-
make_create_data(event_as_data, Map.merge(audience, additional)) do
{:ok, event, create_data}
end
end
@spec create_comment(map(), map()) :: {:ok, map()}
defp create_comment(args, additional) do
with args <- prepare_args_for_comment(args),
{:ok, %Comment{} = comment} <- Conversations.create_comment(args),
comment_as_data <- Convertible.model_to_as(comment),
audience <-
Audience.calculate_to_and_cc_from_mentions(comment),
create_data <-
make_create_data(comment_as_data, Map.merge(audience, additional)) do
{:ok, comment, create_data}
end
end
@spec create_group(map(), map()) :: {:ok, map()}
defp create_group(args, additional) do
with args <- prepare_args_for_group(args),
{:ok, %Actor{type: :Group} = group} <- Actors.create_group(args),
group_as_data <- Convertible.model_to_as(group),
audience <- %{"to" => ["https://www.w3.org/ns/activitystreams#Public"], "cc" => []},
create_data <-
make_create_data(group_as_data, Map.merge(audience, additional)) do
{:ok, group, create_data}
end
end
@spec create_todo_list(map(), map()) :: {:ok, map()}
defp create_todo_list(args, additional) do
with {:ok, %TodoList{actor_id: group_id} = todo_list} <- Todos.create_todo_list(args),
{:ok, %Actor{} = group} <- Actors.get_group_by_actor_id(group_id),
todo_list_as_data <- Convertible.model_to_as(%{todo_list | actor: group}),
audience <- %{"to" => [group.url], "cc" => []},
create_data <-
make_create_data(todo_list_as_data, Map.merge(audience, additional)) do
{:ok, todo_list, create_data}
end
end
@spec create_todo(map(), map()) :: {:ok, map()}
defp create_todo(args, additional) do
with {:ok, %Todo{todo_list_id: todo_list_id, creator_id: creator_id} = todo} <-
Todos.create_todo(args),
%TodoList{actor_id: group_id} = todo_list <- Todos.get_todo_list(todo_list_id),
%Actor{} = creator <- Actors.get_actor(creator_id),
{:ok, %Actor{} = group} <- Actors.get_group_by_actor_id(group_id),
todo <- %{todo | todo_list: %{todo_list | actor: group}, creator: creator},
todo_as_data <-
Convertible.model_to_as(todo),
audience <- %{"to" => [group.url], "cc" => []},
create_data <-
make_create_data(todo_as_data, Map.merge(audience, additional)) do
{:ok, todo, create_data}
end
end
defp create_resource(%{type: type} = args, additional) do
args =
case type do
:folder ->
args
_ ->
case Parser.parse(Map.get(args, :resource_url)) do
{:ok, metadata} ->
Map.put(args, :metadata, metadata)
_ ->
args
end
end
with {:ok,
%Resource{actor_id: group_id, creator_id: creator_id, parent_id: parent_id} = resource} <-
Resources.create_resource(args),
{:ok, %Actor{} = group} <- Actors.get_group_by_actor_id(group_id),
%Actor{url: creator_url} = creator <- Actors.get_actor(creator_id),
resource_as_data <-
Convertible.model_to_as(%{resource | actor: group, creator: creator}),
audience <- %{
"to" => [group.url],
"cc" => [],
"actor" => creator_url,
"attributedTo" => [creator_url]
} do
create_data =
case parent_id do
nil ->
make_create_data(resource_as_data, Map.merge(audience, additional))
parent_id ->
# In case the resource has a parent we don't `Create` the resource but `Add` it to an existing resource
parent = Resources.get_resource(parent_id)
make_add_data(resource_as_data, parent, Map.merge(audience, additional))
end
{:ok, resource, create_data}
else
err ->
Logger.error(inspect(err))
err
end
end
@spec check_for_tombstones(map()) :: Tombstone.t() | nil
defp check_for_tombstones(%{url: url}), do: Tombstone.find_tombstone(url)
defp check_for_tombstones(_), do: nil
@spec update_event(Event.t(), map(), map()) :: {:ok, Event.t(), Activity.t()} | any()
defp update_event(%Event{} = old_event, args, additional) do
with args <- prepare_args_for_event(args),
{:ok, %Event{} = new_event} <- Events.update_event(old_event, args),
{:ok, true} <- Cachex.del(:activity_pub, "event_#{new_event.uuid}"),
event_as_data <- Convertible.model_to_as(new_event),
audience <-
Audience.calculate_to_and_cc_from_mentions(new_event),
update_data <- make_update_data(event_as_data, Map.merge(audience, additional)) do
{:ok, new_event, update_data}
else
err ->
Logger.error("Something went wrong while creating an update activity")
Logger.debug(inspect(err))
err
end
end
@spec update_comment(Comment.t(), map(), map()) :: {:ok, Comment.t(), Activity.t()} | any()
defp update_comment(%Comment{} = old_comment, args, additional) do
with args <- prepare_args_for_comment(args),
{:ok, %Comment{} = new_comment} <- Conversations.update_comment(old_comment, args),
{:ok, true} <- Cachex.del(:activity_pub, "comment_#{new_comment.uuid}"),
comment_as_data <- Convertible.model_to_as(new_comment),
audience <-
Audience.calculate_to_and_cc_from_mentions(new_comment),
update_data <- make_update_data(comment_as_data, Map.merge(audience, additional)) do
{:ok, new_comment, update_data}
else
err ->
Logger.error("Something went wrong while creating an update activity")
Logger.debug(inspect(err))
err
end
end
@spec update_actor(Actor.t(), map, map) :: {:ok, Actor.t(), Activity.t()} | any
defp update_actor(%Actor{} = old_actor, args, additional) do
with {:ok, %Actor{} = new_actor} <- Actors.update_actor(old_actor, args),
actor_as_data <- Convertible.model_to_as(new_actor),
{:ok, true} <- Cachex.del(:activity_pub, "actor_#{new_actor.preferred_username}"),
audience <-
Audience.calculate_to_and_cc_from_mentions(new_actor),
additional <- Map.merge(additional, %{"actor" => old_actor.url}),
update_data <- make_update_data(actor_as_data, Map.merge(audience, additional)) do
{:ok, new_actor, update_data}
end
end
@spec update_actor(Todo.t(), map, map) :: {:ok, Todo.t(), Activity.t()} | any
defp update_todo(%Todo{} = old_todo, args, additional) do
with {:ok, %Todo{todo_list_id: todo_list_id} = todo} <- Todos.update_todo(old_todo, args),
%TodoList{actor_id: group_id} = todo_list <- Todos.get_todo_list(todo_list_id),
{:ok, %Actor{} = group} <- Actors.get_group_by_actor_id(group_id),
todo_as_data <-
Convertible.model_to_as(%{todo | todo_list: %{todo_list | actor: group}}),
audience <- %{"to" => [group.url], "cc" => []},
update_data <-
make_update_data(todo_as_data, Map.merge(audience, additional)) do
{:ok, todo, update_data}
end
end
defp update_resource(%Resource{} = old_resource, %{parent_id: _parent_id} = args, additional) do
move_resource(old_resource, args, additional)
end
# Simple rename
defp update_resource(%Resource{} = old_resource, %{title: title} = _args, additional) do
with {:ok, %Resource{actor_id: group_id, creator_id: creator_id} = resource} <-
Resources.update_resource(old_resource, %{title: title}),
{:ok, %Actor{} = group} <- Actors.get_group_by_actor_id(group_id),
%Actor{url: creator_url} <- Actors.get_actor(creator_id),
resource_as_data <-
Convertible.model_to_as(%{resource | actor: group}),
audience <- %{
"to" => [group.url],
"cc" => [],
"actor" => creator_url,
"attributedTo" => [creator_url]
},
update_data <-
make_update_data(resource_as_data, Map.merge(audience, additional)) do
{:ok, resource, update_data}
else
err ->
Logger.error(inspect(err))
err
end
end
defp move_resource(
%Resource{parent_id: old_parent_id} = old_resource,
%{parent_id: _new_parent_id} = args,
additional
) do
with {:ok,
%Resource{actor_id: group_id, creator_id: creator_id, parent_id: new_parent_id} =
resource} <-
Resources.update_resource(old_resource, args),
old_parent <- Resources.get_resource(old_parent_id),
new_parent <- Resources.get_resource(new_parent_id),
{:ok, %Actor{} = group} <- Actors.get_group_by_actor_id(group_id),
%Actor{url: creator_url} <- Actors.get_actor(creator_id),
resource_as_data <-
Convertible.model_to_as(%{resource | actor: group}),
audience <- %{
"to" => [group.url],
"cc" => [],
"actor" => creator_url,
"attributedTo" => [creator_url]
},
move_data <-
make_move_data(
resource_as_data,
old_parent,
new_parent,
Map.merge(audience, additional)
) do
{:ok, resource, move_data}
else
err ->
Logger.error(inspect(err))
err
end
end
@spec accept_follow(Follower.t(), map) :: {:ok, Follower.t(), Activity.t()} | any
defp accept_follow(%Follower{} = follower, additional) do
with {:ok, %Follower{} = follower} <- Actors.update_follower(follower, %{approved: true}),
follower_as_data <- Convertible.model_to_as(follower),
update_data <-
make_accept_join_data(
follower_as_data,
Map.merge(additional, %{
"id" => "#{Endpoint.url()}/accept/follow/#{follower.id}",
"to" => [follower.actor.url],
"cc" => [],
"actor" => follower.target_actor.url
})
) do
{:ok, follower, update_data}
else
err ->
Logger.error("Something went wrong while creating an update activity")
Logger.debug(inspect(err))
err
end
end
@spec accept_join(Participant.t(), map) :: {:ok, Participant.t(), Activity.t()} | any
defp accept_join(%Participant{} = participant, additional) do
with {:ok, %Participant{} = participant} <-
Events.update_participant(participant, %{role: :participant}),
Absinthe.Subscription.publish(Endpoint, participant.actor,
event_person_participation_changed: participant.actor.id
),
{:ok, _} <-
Scheduler.before_event_notification(participant),
participant_as_data <- Convertible.model_to_as(participant),
audience <-
Audience.calculate_to_and_cc_from_mentions(participant),
update_data <-
make_accept_join_data(
participant_as_data,
Map.merge(Map.merge(audience, additional), %{
"id" => "#{Endpoint.url()}/accept/join/#{participant.id}"
})
) do
{:ok, participant, update_data}
else
err ->
Logger.error("Something went wrong while creating an update activity")
Logger.debug(inspect(err))
err
end
end
@spec accept_invite(Member.t(), map()) :: {:ok, Member.t(), Activity.t()} | any
defp accept_invite(
%Member{invited_by_id: invited_by_id, actor_id: actor_id} = member,
_additional
) do
with %Actor{} = inviter <- Actors.get_actor(invited_by_id),
%Actor{url: actor_url} <- Actors.get_actor(actor_id),
{:ok, %Member{url: member_url, id: member_id} = member} <-
Actors.update_member(member, %{role: :member}),
accept_data <- %{
"type" => "Accept",
"actor" => actor_url,
"to" => [inviter.url],
"cc" => [member.parent.url],
"object" => member_url,
"id" => "#{Endpoint.url()}/accept/invite/member/#{member_id}"
} do
{:ok, member, accept_data}
end
end
@spec reject_join(Participant.t(), map()) :: {:ok, Participant.t(), Activity.t()} | any()
defp reject_join(%Participant{} = participant, additional) do
with {:ok, %Participant{} = participant} <-
Events.update_participant(participant, %{role: :rejected}),
Absinthe.Subscription.publish(Endpoint, participant.actor,
event_person_participation_changed: participant.actor.id
),
participant_as_data <- Convertible.model_to_as(participant),
audience <-
participant
|> Audience.calculate_to_and_cc_from_mentions()
|> Map.merge(additional),
reject_data <- %{
"type" => "Reject",
"object" => participant_as_data
},
update_data <-
reject_data
|> Map.merge(audience)
|> Map.merge(%{
"id" => "#{Endpoint.url()}/reject/join/#{participant.id}"
}) do
{:ok, participant, update_data}
else
err ->
Logger.error("Something went wrong while creating an update activity")
Logger.debug(inspect(err))
err
end
end
@spec reject_follow(Follower.t(), map()) :: {:ok, Follower.t(), Activity.t()} | any()
defp reject_follow(%Follower{} = follower, additional) do
with {:ok, %Follower{} = follower} <- Actors.delete_follower(follower),
follower_as_data <- Convertible.model_to_as(follower),
audience <-
follower.actor |> Audience.calculate_to_and_cc_from_mentions() |> Map.merge(additional),
reject_data <- %{
"to" => [follower.actor.url],
"type" => "Reject",
"actor" => follower.target_actor.url,
"object" => follower_as_data
},
update_data <-
audience
|> Map.merge(reject_data)
|> Map.merge(%{
"id" => "#{Endpoint.url()}/reject/follow/#{follower.id}"
}) do
{:ok, follower, update_data}
else
err ->
Logger.error("Something went wrong while creating an update activity")
Logger.debug(inspect(err))
err
end
end
# Prepare and sanitize arguments for events
defp prepare_args_for_event(args) do
# If title is not set: we are not updating it
args =
if Map.has_key?(args, :title) && !is_nil(args.title),
do: Map.update(args, :title, "", &String.trim(HtmlSanitizeEx.strip_tags(&1))),
else: args
# If we've been given a description (we might not get one if updating)
# sanitize it, HTML it, and extract tags & mentions from it
args =
if Map.has_key?(args, :description) && !is_nil(args.description) do
{description, mentions, tags} =
APIUtils.make_content_html(
String.trim(args.description),
Map.get(args, :tags, []),
"text/html"
)
mentions = ConverterUtils.fetch_mentions(Map.get(args, :mentions, []) ++ mentions)
Map.merge(args, %{
description: description,
mentions: mentions,
tags: tags
})
else
args
end
# Check that we can only allow anonymous participation if our instance allows it
{_, options} =
Map.get_and_update(
Map.get(args, :options, %{anonymous_participation: false}),
:anonymous_participation,
fn value ->
{value, value && Mobilizon.Config.anonymous_participation?()}
end
)
args = Map.put(args, :options, options)
Map.update(args, :tags, [], &ConverterUtils.fetch_tags/1)
end
# Prepare and sanitize arguments for comments
defp prepare_args_for_comment(args) do
with in_reply_to_comment <-
args |> Map.get(:in_reply_to_comment_id) |> Conversations.get_comment_with_preload(),
event <- args |> Map.get(:event_id) |> handle_event_for_comment(),
args <- Map.update(args, :visibility, :public, & &1),
{text, mentions, tags} <-
APIUtils.make_content_html(
args |> Map.get(:text, "") |> String.trim(),
# Can't put additional tags on a comment
[],
"text/html"
),
tags <- ConverterUtils.fetch_tags(tags),
mentions <- Map.get(args, :mentions, []) ++ ConverterUtils.fetch_mentions(mentions),
args <-
Map.merge(args, %{
actor_id: Map.get(args, :actor_id),
text: text,
mentions: mentions,
tags: tags,
event: event,
in_reply_to_comment: in_reply_to_comment,
in_reply_to_comment_id:
if(is_nil(in_reply_to_comment), do: nil, else: Map.get(in_reply_to_comment, :id)),
origin_comment_id:
if(is_nil(in_reply_to_comment),
do: nil,
else: Comment.get_thread_id(in_reply_to_comment)
)
}) do
args
end
end
@spec handle_event_for_comment(String.t() | integer() | nil) :: Event.t() | nil
defp handle_event_for_comment(event_id) when not is_nil(event_id) do
case Events.get_event_with_preload(event_id) do
{:ok, %Event{} = event} -> event
{:error, :event_not_found} -> nil
end
end
defp handle_event_for_comment(nil), do: nil
defp prepare_args_for_group(args) do
with preferred_username <-
args |> Map.get(:preferred_username) |> HtmlSanitizeEx.strip_tags() |> String.trim(),
summary <- args |> Map.get(:summary, "") |> String.trim(),
{summary, _mentions, _tags} <-
summary |> String.trim() |> APIUtils.make_content_html([], "text/html") do
%{args | preferred_username: preferred_username, summary: summary}
end
end
defp prepare_args_for_report(args) do
with {:reporter, %Actor{} = reporter_actor} <-
{:reporter, Actors.get_actor!(args.reporter_id)},
{:reported, %Actor{} = reported_actor} <-
{:reported, Actors.get_actor!(args.reported_id)},
content <- HtmlSanitizeEx.strip_tags(args.content),
event <- Conversations.get_comment(Map.get(args, :event_id)),
{:get_report_comments, comments} <-
{:get_report_comments,
Conversations.list_comments_by_actor_and_ids(
reported_actor.id,
Map.get(args, :comments_ids, [])
)} do
Map.merge(args, %{
reporter: reporter_actor,
reported: reported_actor,
content: content,
event: event,
comments: comments
})
end
end
defp check_for_actor_key_rotation(%Actor{} = actor) do
if Actors.should_rotate_actor_key(actor) do
Actors.schedule_key_rotation(
actor,
Application.get_env(:mobilizon, :activitypub)[:actor_key_rotation_delay]
)
end
:ok
end
end