distraction.party/lib/pleroma/web/activity_pub/activity_pub.ex

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defmodule Pleroma.Web.ActivityPub.ActivityPub do
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alias Pleroma.{Activity, Repo, Object, Upload, User, Notification}
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import Ecto.Query
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import Pleroma.Web.ActivityPub.Utils
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require Logger
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def insert(map, local \\ true) when is_map(map) do
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with nil <- Activity.get_by_ap_id(map["id"]),
map <- lazy_put_activity_defaults(map),
:ok <- insert_full_object(map) do
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{:ok, activity} = Repo.insert(%Activity{data: map, local: local, actor: map["actor"]})
Notification.create_notifications(activity)
stream_out(activity)
{:ok, activity}
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else
%Activity{} = activity -> {:ok, activity}
error -> {:error, error}
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end
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end
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def stream_out(activity) do
if activity.data["type"] in ["Create", "Announce"] do
Pleroma.Web.Streamer.stream("user", activity)
if Enum.member?(activity.data["to"], "https://www.w3.org/ns/activitystreams#Public") do
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Pleroma.Web.Streamer.stream("public", activity)
if activity.local do
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Pleroma.Web.Streamer.stream("public:local", activity)
end
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end
end
end
def create(to, actor, context, object, additional \\ %{}, published \\ nil, local \\ true) do
with create_data <- make_create_data(%{to: to, actor: actor, published: published, context: context, object: object}, additional),
{:ok, activity} <- insert(create_data, local),
:ok <- maybe_federate(activity) do
{:ok, activity}
end
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end
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# TODO: This is weird, maybe we shouldn't check here if we can make the activity.
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def like(%User{ap_id: ap_id} = user, %Object{data: %{"id" => _}} = object, activity_id \\ nil, local \\ true) do
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with nil <- get_existing_like(ap_id, object),
like_data <- make_like_data(user, object, activity_id),
{:ok, activity} <- insert(like_data, local),
{:ok, object} <- add_like_to_object(activity, object),
:ok <- maybe_federate(activity) do
{:ok, activity, object}
else
%Activity{} = activity -> {:ok, activity, object}
error -> {:error, error}
end
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end
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def unlike(%User{} = actor, %Object{} = object) do
with %Activity{} = activity <- get_existing_like(actor.ap_id, object),
{:ok, _activity} <- Repo.delete(activity),
{:ok, object} <- remove_like_from_object(activity, object) do
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{:ok, object}
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else _e -> {:ok, object}
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end
end
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def announce(%User{ap_id: _} = user, %Object{data: %{"id" => _}} = object, activity_id \\ nil, local \\ true) do
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with announce_data <- make_announce_data(user, object, activity_id),
{:ok, activity} <- insert(announce_data, local),
{:ok, object} <- add_announce_to_object(activity, object),
:ok <- maybe_federate(activity) do
{:ok, activity, object}
else
error -> {:error, error}
end
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end
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def follow(follower, followed, activity_id \\ nil, local \\ true) do
with data <- make_follow_data(follower, followed, activity_id),
{:ok, activity} <- insert(data, local),
:ok <- maybe_federate(activity) do
{:ok, activity}
end
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end
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def unfollow(follower, followed, local \\ true) do
with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
unfollow_data <- make_unfollow_data(follower, followed, follow_activity),
{:ok, activity} <- insert(unfollow_data, local),
:ok, maybe_federate(activity) do
{:ok, activity}
end
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end
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def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
user = User.get_cached_by_ap_id(actor)
data = %{
"type" => "Delete",
"actor" => actor,
"object" => id,
"to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
}
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with Repo.delete(object),
Repo.delete_all(Activity.all_non_create_by_object_ap_id_q(id)),
{:ok, activity} <- insert(data, local),
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:ok <- maybe_federate(activity) do
{:ok, activity}
end
end
def fetch_activities_for_context(context, opts \\ %{}) do
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query = from activity in Activity,
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where: fragment("?->>'type' = ? and ?->>'context' = ?", activity.data, "Create", activity.data, ^context),
order_by: [desc: :id]
query = restrict_blocked(query, opts)
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Repo.all(query)
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end
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def fetch_public_activities(opts \\ %{}) do
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public = ["https://www.w3.org/ns/activitystreams#Public"]
fetch_activities(public, opts)
end
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defp restrict_since(query, %{"since_id" => since_id}) do
from activity in query, where: activity.id > ^since_id
end
defp restrict_since(query, _), do: query
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defp restrict_tag(query, %{"tag" => tag}) do
from activity in query,
where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
end
defp restrict_tag(query, _), do: query
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defp restrict_recipients(query, recipients) do
Enum.reduce(recipients, query, fn (recipient, q) ->
map = %{ to: [recipient] }
from activity in q,
or_where: fragment(~s(? @> ?), activity.data, ^map)
end)
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end
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defp restrict_local(query, %{"local_only" => true}) do
from activity in query, where: activity.local == true
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end
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defp restrict_local(query, _), do: query
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defp restrict_max(query, %{"max_id" => max_id}) do
from activity in query, where: activity.id < ^max_id
end
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defp restrict_max(query, _), do: query
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defp restrict_actor(query, %{"actor_id" => actor_id}) do
from activity in query,
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where: activity.actor == ^actor_id
end
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defp restrict_actor(query, _), do: query
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defp restrict_type(query, %{"type" => type}) when is_binary(type) do
restrict_type(query, %{"type" => [type]})
end
defp restrict_type(query, %{"type" => type}) do
from activity in query,
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where: fragment("?->>'type' = ANY(?)", activity.data, ^type)
end
defp restrict_type(query, _), do: query
defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
from activity in query,
where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
end
defp restrict_favorited_by(query, _), do: query
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defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
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from activity in query,
where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
end
defp restrict_media(query, _), do: query
# Only search through last 100_000 activities by default
defp restrict_recent(query, %{"whole_db" => true}), do: query
defp restrict_recent(query, _) do
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since = (Repo.aggregate(Activity, :max, :id) || 0) - 100_000
from activity in query,
where: activity.id > ^since
end
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defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
blocks = info["blocks"] || []
from activity in query,
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where: fragment("not (? = ANY(?))", activity.actor, ^blocks)
end
defp restrict_blocked(query, _), do: query
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def fetch_activities(recipients, opts \\ %{}) do
base_query = from activity in Activity,
limit: 20,
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order_by: [fragment("? desc nulls last", activity.id)]
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base_query
|> restrict_recipients(recipients)
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|> restrict_tag(opts)
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|> restrict_since(opts)
|> restrict_local(opts)
|> restrict_max(opts)
|> restrict_actor(opts)
|> restrict_type(opts)
|> restrict_favorited_by(opts)
|> restrict_recent(opts)
|> restrict_blocked(opts)
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|> restrict_media(opts)
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|> Repo.all
|> Enum.reverse
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end
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def upload(file) do
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data = Upload.store(file)
Repo.insert(%Object{data: data})
end
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end