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diff --git a/lib/pleroma/web/activity_pub/utils.ex b/lib/pleroma/web/activity_pub/utils.ex
index d81c824f0..174906537 100644
--- a/lib/pleroma/web/activity_pub/utils.ex
+++ b/lib/pleroma/web/activity_pub/utils.ex
@@ -1,516 +1,516 @@
defmodule Pleroma.Web.ActivityPub.Utils do
alias Pleroma.{Repo, Web, Object, Activity, User}
alias Pleroma.Web.Router.Helpers
alias Pleroma.Web.Endpoint
alias Ecto.{Changeset, UUID}
import Ecto.Query
require Logger
# Some implementations send the actor URI as the actor field, others send the entire actor object,
# so figure out what the actor's URI is based on what we have.
def get_ap_id(object) do
case object do
%{"id" => id} -> id
id -> id
end
end
def normalize_params(params) do
Map.put(params, "actor", get_ap_id(params["actor"]))
end
defp recipient_in_collection(ap_id, coll) when is_binary(coll), do: ap_id == coll
defp recipient_in_collection(ap_id, coll) when is_list(coll), do: ap_id in coll
defp recipient_in_collection(_, _), do: false
def recipient_in_message(ap_id, params) do
cond do
recipient_in_collection(ap_id, params["to"]) ->
true
recipient_in_collection(ap_id, params["cc"]) ->
true
recipient_in_collection(ap_id, params["bto"]) ->
true
recipient_in_collection(ap_id, params["bcc"]) ->
true
# if the message is unaddressed at all, then assume it is directly addressed
# to the recipient
!params["to"] && !params["cc"] && !params["bto"] && !params["bcc"] ->
true
true ->
false
end
end
defp extract_list(target) when is_binary(target), do: [target]
defp extract_list(lst) when is_list(lst), do: lst
defp extract_list(_), do: []
def maybe_splice_recipient(ap_id, params) do
need_splice =
!recipient_in_collection(ap_id, params["to"]) &&
!recipient_in_collection(ap_id, params["cc"])
cc_list = extract_list(params["cc"])
if need_splice do
params
|> Map.put("cc", [ap_id | cc_list])
else
params
end
end
def make_json_ld_header do
%{
"@context" => [
"https://www.w3.org/ns/activitystreams",
- "https://litepub.github.io/litepub/context.jsonld"
+ "#{Web.base_url()}/litepub-1.0.jsonld"
]
}
end
def make_date do
DateTime.utc_now() |> DateTime.to_iso8601()
end
def generate_activity_id do
generate_id("activities")
end
def generate_context_id do
generate_id("contexts")
end
def generate_object_id do
Helpers.o_status_url(Endpoint, :object, UUID.generate())
end
def generate_id(type) do
"#{Web.base_url()}/#{type}/#{UUID.generate()}"
end
def create_context(context) do
context = context || generate_id("contexts")
changeset = Object.context_mapping(context)
case Repo.insert(changeset) do
{:ok, object} ->
object
# This should be solved by an upsert, but it seems ecto
# has problems accessing the constraint inside the jsonb.
{:error, _} ->
Object.get_cached_by_ap_id(context)
end
end
@doc """
Enqueues an activity for federation if it's local
"""
def maybe_federate(%Activity{local: true} = activity) do
priority =
case activity.data["type"] do
"Delete" -> 10
"Create" -> 1
_ -> 5
end
Pleroma.Web.Federator.enqueue(:publish, activity, priority)
:ok
end
def maybe_federate(_), do: :ok
@doc """
Adds an id and a published data if they aren't there,
also adds it to an included object
"""
def lazy_put_activity_defaults(map) do
%{data: %{"id" => context}, id: context_id} = create_context(map["context"])
map =
map
|> Map.put_new_lazy("id", &generate_activity_id/0)
|> Map.put_new_lazy("published", &make_date/0)
|> Map.put_new("context", context)
|> Map.put_new("context_id", context_id)
if is_map(map["object"]) do
object = lazy_put_object_defaults(map["object"], map)
%{map | "object" => object}
else
map
end
end
@doc """
Adds an id and published date if they aren't there.
"""
def lazy_put_object_defaults(map, activity \\ %{}) do
map
|> Map.put_new_lazy("id", &generate_object_id/0)
|> Map.put_new_lazy("published", &make_date/0)
|> Map.put_new("context", activity["context"])
|> Map.put_new("context_id", activity["context_id"])
end
@doc """
Inserts a full object if it is contained in an activity.
"""
def insert_full_object(%{"object" => %{"type" => type} = object_data})
when is_map(object_data) and type in ["Article", "Note", "Video", "Page"] do
with {:ok, _} <- Object.create(object_data) do
:ok
end
end
def insert_full_object(_), do: :ok
def update_object_in_activities(%{data: %{"id" => id}} = object) do
# TODO
# Update activities that already had this. Could be done in a seperate process.
# Alternatively, just don't do this and fetch the current object each time. Most
# could probably be taken from cache.
relevant_activities = Activity.all_by_object_ap_id(id)
Enum.map(relevant_activities, fn activity ->
new_activity_data = activity.data |> Map.put("object", object.data)
changeset = Changeset.change(activity, data: new_activity_data)
Repo.update(changeset)
end)
end
#### Like-related helpers
@doc """
Returns an existing like if a user already liked an object
"""
def get_existing_like(actor, %{data: %{"id" => id}}) do
query =
from(
activity in Activity,
where: fragment("(?)->>'actor' = ?", activity.data, ^actor),
# this is to use the index
where:
fragment(
"coalesce((?)->'object'->>'id', (?)->>'object') = ?",
activity.data,
activity.data,
^id
),
where: fragment("(?)->>'type' = 'Like'", activity.data)
)
Repo.one(query)
end
def make_like_data(%User{ap_id: ap_id} = actor, %{data: %{"id" => id}} = object, activity_id) do
data = %{
"type" => "Like",
"actor" => ap_id,
"object" => id,
"to" => [actor.follower_address, object.data["actor"]],
"cc" => ["https://www.w3.org/ns/activitystreams#Public"],
"context" => object.data["context"]
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
def update_element_in_object(property, element, object) do
with new_data <-
object.data
|> Map.put("#{property}_count", length(element))
|> Map.put("#{property}s", element),
changeset <- Changeset.change(object, data: new_data),
{:ok, object} <- Repo.update(changeset),
_ <- update_object_in_activities(object) do
{:ok, object}
end
end
def update_likes_in_object(likes, object) do
update_element_in_object("like", likes, object)
end
def add_like_to_object(%Activity{data: %{"actor" => actor}}, object) do
likes = if is_list(object.data["likes"]), do: object.data["likes"], else: []
with likes <- [actor | likes] |> Enum.uniq() do
update_likes_in_object(likes, object)
end
end
def remove_like_from_object(%Activity{data: %{"actor" => actor}}, object) do
likes = if is_list(object.data["likes"]), do: object.data["likes"], else: []
with likes <- likes |> List.delete(actor) do
update_likes_in_object(likes, object)
end
end
#### Follow-related helpers
@doc """
Updates a follow activity's state (for locked accounts).
"""
def update_follow_state(%Activity{} = activity, state) do
with new_data <-
activity.data
|> Map.put("state", state),
changeset <- Changeset.change(activity, data: new_data),
{:ok, activity} <- Repo.update(changeset) do
{:ok, activity}
end
end
@doc """
Makes a follow activity data for the given follower and followed
"""
def make_follow_data(
%User{ap_id: follower_id},
%User{ap_id: followed_id} = followed,
activity_id
) do
data = %{
"type" => "Follow",
"actor" => follower_id,
"to" => [followed_id],
"cc" => ["https://www.w3.org/ns/activitystreams#Public"],
"object" => followed_id,
"state" => "pending"
}
data = if activity_id, do: Map.put(data, "id", activity_id), else: data
data
end
def fetch_latest_follow(%User{ap_id: follower_id}, %User{ap_id: followed_id}) do
query =
from(
activity in Activity,
where:
fragment(
"? ->> 'type' = 'Follow'",
activity.data
),
where: activity.actor == ^follower_id,
where:
fragment(
"? @> ?",
activity.data,
^%{object: followed_id}
),
order_by: [desc: :id],
limit: 1
)
Repo.one(query)
end
#### Announce-related helpers
@doc """
Retruns an existing announce activity if the notice has already been announced
"""
def get_existing_announce(actor, %{data: %{"id" => id}}) do
query =
from(
activity in Activity,
where: activity.actor == ^actor,
# this is to use the index
where:
fragment(
"coalesce((?)->'object'->>'id', (?)->>'object') = ?",
activity.data,
activity.data,
^id
),
where: fragment("(?)->>'type' = 'Announce'", activity.data)
)
Repo.one(query)
end
@doc """
Make announce activity data for the given actor and object
"""
# for relayed messages, we only want to send to subscribers
def make_announce_data(
%User{ap_id: ap_id, nickname: nil} = user,
%Object{data: %{"id" => id}} = object,
activity_id
) do
data = %{
"type" => "Announce",
"actor" => ap_id,
"object" => id,
"to" => [user.follower_address],
"cc" => [],
"context" => object.data["context"]
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
def make_announce_data(
%User{ap_id: ap_id} = user,
%Object{data: %{"id" => id}} = object,
activity_id
) do
data = %{
"type" => "Announce",
"actor" => ap_id,
"object" => id,
"to" => [user.follower_address, object.data["actor"]],
"cc" => ["https://www.w3.org/ns/activitystreams#Public"],
"context" => object.data["context"]
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
@doc """
Make unannounce activity data for the given actor and object
"""
def make_unannounce_data(
%User{ap_id: ap_id} = user,
%Activity{data: %{"context" => context}} = activity,
activity_id
) do
data = %{
"type" => "Undo",
"actor" => ap_id,
"object" => activity.data,
"to" => [user.follower_address, activity.data["actor"]],
"cc" => ["https://www.w3.org/ns/activitystreams#Public"],
"context" => context
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
def make_unlike_data(
%User{ap_id: ap_id} = user,
%Activity{data: %{"context" => context}} = activity,
activity_id
) do
data = %{
"type" => "Undo",
"actor" => ap_id,
"object" => activity.data,
"to" => [user.follower_address, activity.data["actor"]],
"cc" => ["https://www.w3.org/ns/activitystreams#Public"],
"context" => context
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
def add_announce_to_object(
%Activity{
data: %{"actor" => actor, "cc" => ["https://www.w3.org/ns/activitystreams#Public"]}
},
object
) do
announcements =
if is_list(object.data["announcements"]), do: object.data["announcements"], else: []
with announcements <- [actor | announcements] |> Enum.uniq() do
update_element_in_object("announcement", announcements, object)
end
end
def add_announce_to_object(_, object), do: {:ok, object}
def remove_announce_from_object(%Activity{data: %{"actor" => actor}}, object) do
announcements =
if is_list(object.data["announcements"]), do: object.data["announcements"], else: []
with announcements <- announcements |> List.delete(actor) do
update_element_in_object("announcement", announcements, object)
end
end
#### Unfollow-related helpers
def make_unfollow_data(follower, followed, follow_activity, activity_id) do
data = %{
"type" => "Undo",
"actor" => follower.ap_id,
"to" => [followed.ap_id],
"object" => follow_activity.data
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
#### Block-related helpers
def fetch_latest_block(%User{ap_id: blocker_id}, %User{ap_id: blocked_id}) do
query =
from(
activity in Activity,
where:
fragment(
"? ->> 'type' = 'Block'",
activity.data
),
where: activity.actor == ^blocker_id,
where:
fragment(
"? @> ?",
activity.data,
^%{object: blocked_id}
),
order_by: [desc: :id],
limit: 1
)
Repo.one(query)
end
def make_block_data(blocker, blocked, activity_id) do
data = %{
"type" => "Block",
"actor" => blocker.ap_id,
"to" => [blocked.ap_id],
"object" => blocked.ap_id
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
def make_unblock_data(blocker, blocked, block_activity, activity_id) do
data = %{
"type" => "Undo",
"actor" => blocker.ap_id,
"to" => [blocked.ap_id],
"object" => block_activity.data
}
if activity_id, do: Map.put(data, "id", activity_id), else: data
end
#### Create-related helpers
def make_create_data(params, additional) do
published = params.published || make_date()
%{
"type" => "Create",
"to" => params.to |> Enum.uniq(),
"actor" => params.actor.ap_id,
"object" => params.object,
"published" => published,
"context" => params.context
}
|> Map.merge(additional)
end
end

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