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# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Activity do
use Ecto.Schema
alias Pleroma.Activity
alias Pleroma.Activity.Queries
alias Pleroma.ActivityExpiration
alias Pleroma.Bookmark
alias Pleroma.Notification
alias Pleroma.Object
alias Pleroma.Repo
alias Pleroma.ReportNote
alias Pleroma.ThreadMute
alias Pleroma.User
import Ecto.Changeset
import Ecto.Query
@type t :: %__MODULE__{}
@type actor :: String.t()
@primary_key {:id, FlakeId.Ecto.CompatType, autogenerate: true}
# https://github.com/tootsuite/mastodon/blob/master/app/models/notification.rb#L19
@mastodon_notification_types %{
"Create" => "mention",
"Follow" => "follow",
"Announce" => "reblog",
"Like" => "favourite",
"Move" => "move",
"EmojiReact" => "pleroma:emoji_reaction"
}
@mastodon_to_ap_notification_types for {k, v} <- @mastodon_notification_types,
into: %{},
do: {v, k}
schema "activities" do
field(:data, :map)
field(:local, :boolean, default: true)
field(:actor, :string)
field(:recipients, {:array, :string}, default: [])
field(:thread_muted?, :boolean, virtual: true)
# This is a fake relation,
# do not use outside of with_preloaded_user_actor/with_joined_user_actor
has_one(:user_actor, User, on_delete: :nothing, foreign_key: :id)
# This is a fake relation, do not use outside of with_preloaded_bookmark/get_bookmark
has_one(:bookmark, Bookmark)
# This is a fake relation, do not use outside of with_preloaded_report_notes
has_many(:report_notes, ReportNote)
has_many(:notifications, Notification, on_delete: :delete_all)
# Attention: this is a fake relation, don't try to preload it blindly and expect it to work!
# The foreign key is embedded in a jsonb field.
#
# To use it, you probably want to do an inner join and a preload:
#
# ```
# |> join(:inner, [activity], o in Object,
# on: fragment("(?->>'id') = COALESCE((?)->'object'->> 'id', (?)->>'object')",
# o.data, activity.data, activity.data))
# |> preload([activity, object], [object: object])
# ```
#
# As a convenience, Activity.with_preloaded_object() sets up an inner join and preload for the
# typical case.
has_one(:object, Object, on_delete: :nothing, foreign_key: :id)
has_one(:expiration, ActivityExpiration, on_delete: :delete_all)
timestamps()
end
def with_joined_object(query, join_type \\ :inner) do
join(query, join_type, [activity], o in Object,
on:
fragment(
"(?->>'id') = COALESCE(?->'object'->>'id', ?->>'object')",
o.data,
activity.data,
activity.data
),
as: :object
)
end
def with_preloaded_object(query, join_type \\ :inner) do
query
|> has_named_binding?(:object)
|> if(do: query, else: with_joined_object(query, join_type))
|> preload([activity, object: object], object: object)
end
# Note: applies to fake activities (ActivityPub.Utils.get_notified_from_object/1 etc.)
def user_actor(%Activity{actor: nil}), do: nil
def user_actor(%Activity{} = activity) do
with %User{} <- activity.user_actor do
activity.user_actor
else
_ -> User.get_cached_by_ap_id(activity.actor)
end
end
def with_joined_user_actor(query, join_type \\ :inner) do
join(query, join_type, [activity], u in User,
on: u.ap_id == activity.actor,
as: :user_actor
)
end
def with_preloaded_user_actor(query, join_type \\ :inner) do
query
|> with_joined_user_actor(join_type)
|> preload([activity, user_actor: user_actor], user_actor: user_actor)
end
def with_preloaded_bookmark(query, %User{} = user) do
from([a] in query,
left_join: b in Bookmark,
on: b.user_id == ^user.id and b.activity_id == a.id,
preload: [bookmark: b]
)
end
def with_preloaded_bookmark(query, _), do: query
def with_preloaded_report_notes(query) do
from([a] in query,
left_join: r in ReportNote,
on: a.id == r.activity_id,
preload: [report_notes: r]
)
end
def with_preloaded_report_notes(query, _), do: query
def with_set_thread_muted_field(query, %User{} = user) do
from([a] in query,
left_join: tm in ThreadMute,
on: tm.user_id == ^user.id and tm.context == fragment("?->>'context'", a.data),
as: :thread_mute,
select: %Activity{a | thread_muted?: not is_nil(tm.id)}
)
end
def with_set_thread_muted_field(query, _), do: query
def get_by_ap_id(ap_id) do
ap_id
|> Queries.by_ap_id()
|> Repo.one()
end
def get_bookmark(%Activity{} = activity, %User{} = user) do
if Ecto.assoc_loaded?(activity.bookmark) do
activity.bookmark
else
Bookmark.get(user.id, activity.id)
end
end
def get_bookmark(_, _), do: nil
def change(struct, params \\ %{}) do
struct
|> cast(params, [:data, :recipients])
|> validate_required([:data])
|> unique_constraint(:ap_id, name: :activities_unique_apid_index)
end
def get_by_ap_id_with_object(ap_id) do
ap_id
|> Queries.by_ap_id()
|> with_preloaded_object(:left)
|> Repo.one()
end
@spec get_by_id(String.t()) :: Activity.t() | nil
def get_by_id(id) do
case FlakeId.flake_id?(id) do
true ->
Activity
|> where([a], a.id == ^id)
|> restrict_deactivated_users()
|> Repo.one()
_ ->
nil
end
end
def get_by_id_with_object(id) do
Activity
|> where(id: ^id)
|> with_preloaded_object()
|> Repo.one()
end
def all_by_ids_with_object(ids) do
Activity
|> where([a], a.id in ^ids)
|> with_preloaded_object()
|> Repo.all()
end
@doc """
Accepts `ap_id` or list of `ap_id`.
Returns a query.
"""
@spec create_by_object_ap_id(String.t() | [String.t()]) :: Ecto.Queryable.t()
def create_by_object_ap_id(ap_id) do
ap_id
|> Queries.by_object_id()
|> Queries.by_type("Create")
end
def get_all_create_by_object_ap_id(ap_id) do
ap_id
|> create_by_object_ap_id()
|> Repo.all()
end
def get_create_by_object_ap_id(ap_id) when is_binary(ap_id) do
create_by_object_ap_id(ap_id)
|> restrict_deactivated_users()
|> Repo.one()
end
def get_create_by_object_ap_id(_), do: nil
@doc """
Accepts `ap_id` or list of `ap_id`.
Returns a query.
"""
@spec create_by_object_ap_id_with_object(String.t() | [String.t()]) :: Ecto.Queryable.t()
def create_by_object_ap_id_with_object(ap_id) do
ap_id
|> create_by_object_ap_id()
|> with_preloaded_object()
end
def get_create_by_object_ap_id_with_object(ap_id) when is_binary(ap_id) do
ap_id
|> create_by_object_ap_id_with_object()
|> Repo.one()
end
def get_create_by_object_ap_id_with_object(_), do: nil
defp get_in_reply_to_activity_from_object(%Object{data: %{"inReplyTo" => ap_id}}) do
get_create_by_object_ap_id_with_object(ap_id)
end
defp get_in_reply_to_activity_from_object(_), do: nil
def get_in_reply_to_activity(%Activity{} = activity) do
get_in_reply_to_activity_from_object(Object.normalize(activity))
end
def normalize(obj) when is_map(obj), do: get_by_ap_id_with_object(obj["id"])
def normalize(ap_id) when is_binary(ap_id), do: get_by_ap_id_with_object(ap_id)
def normalize(_), do: nil
def delete_all_by_object_ap_id(id) when is_binary(id) do
id
|> Queries.by_object_id()
|> Queries.exclude_type("Delete")
|> select([u], u)
|> Repo.delete_all()
|> elem(1)
|> Enum.find(fn
%{data: %{"type" => "Create", "object" => ap_id}} when is_binary(ap_id) -> ap_id == id
%{data: %{"type" => "Create", "object" => %{"id" => ap_id}}} -> ap_id == id
_ -> nil
end)
|> purge_web_resp_cache()
end
def delete_all_by_object_ap_id(_), do: nil
defp purge_web_resp_cache(%Activity{} = activity) do
%{path: path} = URI.parse(activity.data["id"])
Cachex.del(:web_resp_cache, path)
activity
end
defp purge_web_resp_cache(nil), do: nil
for {ap_type, type} <- @mastodon_notification_types do
def mastodon_notification_type(%Activity{data: %{"type" => unquote(ap_type)}}),
do: unquote(type)
end
def mastodon_notification_type(%Activity{}), do: nil
def from_mastodon_notification_type(type) do
Map.get(@mastodon_to_ap_notification_types, type)
end
def all_by_actor_and_id(actor, status_ids \\ [])
def all_by_actor_and_id(_actor, []), do: []
def all_by_actor_and_id(actor, status_ids) do
Activity
|> where([s], s.id in ^status_ids)
|> where([s], s.actor == ^actor)
|> Repo.all()
end
def follow_requests_for_actor(%Pleroma.User{ap_id: ap_id}) do
ap_id
|> Queries.by_object_id()
|> Queries.by_type("Follow")
|> where([a], fragment("? ->> 'state' = 'pending'", a.data))
end
def following_requests_for_actor(%Pleroma.User{ap_id: ap_id}) do
Queries.by_type("Follow")
|> where([a], fragment("?->>'state' = 'pending'", a.data))
|> where([a], a.actor == ^ap_id)
|> Repo.all()
end
def restrict_deactivated_users(query) do
deactivated_users =
from(u in User.Query.build(%{deactivated: true}), select: u.ap_id)
|> Repo.all()
Activity.Queries.exclude_authors(query, deactivated_users)
end
defdelegate search(user, query, options \\ []), to: Pleroma.Activity.Search
def direct_conversation_id(activity, for_user) do
alias Pleroma.Conversation.Participation
with %{data: %{"context" => context}} when is_binary(context) <- activity,
%Pleroma.Conversation{} = conversation <- Pleroma.Conversation.get_for_ap_id(context),
%Participation{id: participation_id} <-
Participation.for_user_and_conversation(for_user, conversation) do
participation_id
else
_ -> nil
end
end
end

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