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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.Notification do
use Ecto.Schema
alias Pleroma.Activity
alias Pleroma.Notification
alias Pleroma.Object
alias Pleroma.Pagination
alias Pleroma.Repo
alias Pleroma.User
alias Pleroma.Web.CommonAPI.Utils
alias Pleroma.Web.Push
alias Pleroma.Web.Streamer
import Ecto.Query
import Ecto.Changeset
require Logger
@type t :: %__MODULE__{}
@include_muted_option :with_muted
schema "notifications" do
field(:seen, :boolean, default: false)
belongs_to(:user, User, type: FlakeId.Ecto.CompatType)
belongs_to(:activity, Activity, type: FlakeId.Ecto.CompatType)
timestamps()
end
def changeset(%Notification{} = notification, attrs) do
notification
|> cast(attrs, [:seen])
end
defp for_user_query_ap_id_opts(user, opts) do
ap_id_relations =
[:block] ++
if opts[@include_muted_option], do: [], else: [:notification_mute]
preloaded_ap_ids = User.outgoing_relations_ap_ids(user, ap_id_relations)
exclude_blocked_opts = Map.merge(%{blocked_users_ap_ids: preloaded_ap_ids[:block]}, opts)
exclude_notification_muted_opts =
Map.merge(%{notification_muted_users_ap_ids: preloaded_ap_ids[:notification_mute]}, opts)
{exclude_blocked_opts, exclude_notification_muted_opts}
end
def for_user_query(user, opts \\ %{}) do
{exclude_blocked_opts, exclude_notification_muted_opts} =
for_user_query_ap_id_opts(user, opts)
Notification
|> where(user_id: ^user.id)
|> where(
[n, a],
fragment(
"? not in (SELECT ap_id FROM users WHERE deactivated = 'true')",
a.actor
)
)
|> join(:inner, [n], activity in assoc(n, :activity))
|> join(:left, [n, a], object in Object,
on:
fragment(
"(?->>'id') = COALESCE((? -> 'object'::text) ->> 'id'::text)",
object.data,
a.data
)
)
|> preload([n, a, o], activity: {a, object: o})
|> exclude_notification_muted(user, exclude_notification_muted_opts)
|> exclude_blocked(user, exclude_blocked_opts)
|> exclude_visibility(opts)
|> exclude_move(opts)
end
defp exclude_blocked(query, user, opts) do
blocked_ap_ids = opts[:blocked_users_ap_ids] || User.blocked_users_ap_ids(user)
query
|> where([n, a], a.actor not in ^blocked_ap_ids)
|> where(
[n, a],
fragment("substring(? from '.*://([^/]*)')", a.actor) not in ^user.domain_blocks
)
end
defp exclude_notification_muted(query, _, %{@include_muted_option => true}) do
query
end
defp exclude_notification_muted(query, user, opts) do
notification_muted_ap_ids =
opts[:notification_muted_users_ap_ids] || User.notification_muted_users_ap_ids(user)
query
|> where([n, a], a.actor not in ^notification_muted_ap_ids)
|> join(:left, [n, a], tm in Pleroma.ThreadMute,
on: tm.user_id == ^user.id and tm.context == fragment("?->>'context'", a.data)
)
|> where([n, a, o, tm], is_nil(tm.user_id))
end
defp exclude_move(query, %{with_move: true}) do
query
end
defp exclude_move(query, _opts) do
where(query, [n, a], fragment("?->>'type' != 'Move'", a.data))
end
@valid_visibilities ~w[direct unlisted public private]
defp exclude_visibility(query, %{exclude_visibilities: visibility})
when is_list(visibility) do
if Enum.all?(visibility, &(&1 in @valid_visibilities)) do
query
|> join(:left, [n, a], mutated_activity in Pleroma.Activity,
on:
fragment("?->>'context'", a.data) ==
fragment("?->>'context'", mutated_activity.data) and
fragment("(?->>'type' = 'Like' or ?->>'type' = 'Announce')", a.data, a.data) and
fragment("?->>'type'", mutated_activity.data) == "Create",
as: :mutated_activity
)
|> where(
[n, a, mutated_activity: mutated_activity],
not fragment(
"""
CASE WHEN (?->>'type') = 'Like' or (?->>'type') = 'Announce'
THEN (activity_visibility(?, ?, ?) = ANY (?))
ELSE (activity_visibility(?, ?, ?) = ANY (?)) END
""",
a.data,
a.data,
mutated_activity.actor,
mutated_activity.recipients,
mutated_activity.data,
^visibility,
a.actor,
a.recipients,
a.data,
^visibility
)
)
else
Logger.error("Could not exclude visibility to #{visibility}")
query
end
end
defp exclude_visibility(query, %{exclude_visibilities: visibility})
when visibility in @valid_visibilities do
exclude_visibility(query, [visibility])
end
defp exclude_visibility(query, %{exclude_visibilities: visibility})
when visibility not in @valid_visibilities do
Logger.error("Could not exclude visibility to #{visibility}")
query
end
defp exclude_visibility(query, _visibility), do: query
def for_user(user, opts \\ %{}) do
user
|> for_user_query(opts)
|> Pagination.fetch_paginated(opts)
end
@doc """
Returns notifications for user received since given date.
## Examples
iex> Pleroma.Notification.for_user_since(%Pleroma.User{}, ~N[2019-04-13 11:22:33])
[%Pleroma.Notification{}, %Pleroma.Notification{}]
iex> Pleroma.Notification.for_user_since(%Pleroma.User{}, ~N[2019-04-15 11:22:33])
[]
"""
@spec for_user_since(Pleroma.User.t(), NaiveDateTime.t()) :: [t()]
def for_user_since(user, date) do
from(n in for_user_query(user),
where: n.updated_at > ^date
)
|> Repo.all()
end
def set_read_up_to(%{id: user_id} = _user, id) do
query =
from(
n in Notification,
where: n.user_id == ^user_id,
where: n.id <= ^id,
where: n.seen == false,
update: [
set: [
seen: true,
updated_at: ^NaiveDateTime.utc_now()
]
],
# Ideally we would preload object and activities here
# but Ecto does not support preloads in update_all
select: n.id
)
{_, notification_ids} = Repo.update_all(query, [])
Notification
|> where([n], n.id in ^notification_ids)
|> join(:inner, [n], activity in assoc(n, :activity))
|> join(:left, [n, a], object in Object,
on:
fragment(
"(?->>'id') = COALESCE((? -> 'object'::text) ->> 'id'::text)",
object.data,
a.data
)
)
|> preload([n, a, o], activity: {a, object: o})
|> Repo.all()
end
def read_one(%User{} = user, notification_id) do
with {:ok, %Notification{} = notification} <- get(user, notification_id) do
notification
|> changeset(%{seen: true})
|> Repo.update()
end
end
def get(%{id: user_id} = _user, id) do
query =
from(
n in Notification,
where: n.id == ^id,
join: activity in assoc(n, :activity),
preload: [activity: activity]
)
notification = Repo.one(query)
case notification do
%{user_id: ^user_id} ->
{:ok, notification}
_ ->
{:error, "Cannot get notification"}
end
end
def clear(user) do
from(n in Notification, where: n.user_id == ^user.id)
|> Repo.delete_all()
end
def destroy_multiple(%{id: user_id} = _user, ids) do
from(n in Notification,
where: n.id in ^ids,
where: n.user_id == ^user_id
)
|> Repo.delete_all()
end
def dismiss(%{id: user_id} = _user, id) do
notification = Repo.get(Notification, id)
case notification do
%{user_id: ^user_id} ->
Repo.delete(notification)
_ ->
{:error, "Cannot dismiss notification"}
end
end
def create_notifications(%Activity{data: %{"to" => _, "type" => "Create"}} = activity) do
object = Object.normalize(activity)
unless object && object.data["type"] == "Answer" do
users = get_notified_from_activity(activity)
notifications = Enum.map(users, fn user -> create_notification(activity, user) end)
{:ok, notifications}
else
{:ok, []}
end
end
def create_notifications(%Activity{data: %{"type" => type}} = activity)
when type in ["Like", "Announce", "Follow", "Move", "EmojiReact"] do
notifications =
activity
|> get_notified_from_activity()
|> Enum.map(&create_notification(activity, &1))
{:ok, notifications}
end
def create_notifications(_), do: {:ok, []}
# TODO move to sql, too.
def create_notification(%Activity{} = activity, %User{} = user) do
unless skip?(activity, user) do
notification = %Notification{user_id: user.id, activity: activity}
{:ok, notification} = Repo.insert(notification)
["user", "user:notification"]
|> Streamer.stream(notification)
Push.send(notification)
notification
end
end
def get_notified_from_activity(activity, local_only \\ true)
def get_notified_from_activity(%Activity{data: %{"type" => type}} = activity, local_only)
when type in ["Create", "Like", "Announce", "Follow", "Move", "EmojiReact"] do
[]
|> Utils.maybe_notify_to_recipients(activity)
|> Utils.maybe_notify_mentioned_recipients(activity)
|> Utils.maybe_notify_subscribers(activity)
|> Utils.maybe_notify_followers(activity)
|> Enum.uniq()
|> User.get_users_from_set(local_only)
end
def get_notified_from_activity(_, _local_only), do: []
@spec skip?(Activity.t(), User.t()) :: boolean()
def skip?(activity, user) do
[
:self,
:followers,
:follows,
:non_followers,
:non_follows,
:recently_followed
]
|> Enum.any?(&skip?(&1, activity, user))
end
@spec skip?(atom(), Activity.t(), User.t()) :: boolean()
def skip?(:self, activity, user) do
activity.data["actor"] == user.ap_id
end
def skip?(
:followers,
activity,
%{notification_settings: %{followers: false}} = user
) do
actor = activity.data["actor"]
follower = User.get_cached_by_ap_id(actor)
User.following?(follower, user)
end
def skip?(
:non_followers,
activity,
%{notification_settings: %{non_followers: false}} = user
) do
actor = activity.data["actor"]
follower = User.get_cached_by_ap_id(actor)
!User.following?(follower, user)
end
def skip?(:follows, activity, %{notification_settings: %{follows: false}} = user) do
actor = activity.data["actor"]
followed = User.get_cached_by_ap_id(actor)
User.following?(user, followed)
end
def skip?(
:non_follows,
activity,
%{notification_settings: %{non_follows: false}} = user
) do
actor = activity.data["actor"]
followed = User.get_cached_by_ap_id(actor)
!User.following?(user, followed)
end
def skip?(:recently_followed, %{data: %{"type" => "Follow"}} = activity, user) do
actor = activity.data["actor"]
Notification.for_user(user)
|> Enum.any?(fn
%{activity: %{data: %{"type" => "Follow", "actor" => ^actor}}} -> true
_ -> false
end)
end
def skip?(_, _, _), do: false
end

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