akkoma/lib/pleroma/notification.ex

710 lines
20 KiB
Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Notification do
use Ecto.Schema
alias Ecto.Multi
alias Pleroma.Activity
alias Pleroma.FollowingRelationship
alias Pleroma.Marker
alias Pleroma.Notification
alias Pleroma.Object
alias Pleroma.Pagination
alias Pleroma.Repo
alias Pleroma.ThreadMute
alias Pleroma.User
alias Pleroma.Web.CommonAPI
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)
# This is an enum type in the database. If you add a new notification type,
# remember to add a migration to add it to the `notifications_type` enum
# as well.
field(:type, :string)
belongs_to(:user, User, type: FlakeId.Ecto.CompatType)
belongs_to(:activity, Activity, type: FlakeId.Ecto.CompatType)
timestamps()
end
def update_notification_type(user, activity) do
with %__MODULE__{} = notification <-
Repo.get_by(__MODULE__, user_id: user.id, activity_id: activity.id) do
type =
activity
|> type_from_activity()
notification
|> changeset(%{type: type})
|> Repo.update()
end
end
@spec unread_notifications_count(User.t()) :: integer()
def unread_notifications_count(%User{id: user_id}) do
from(q in __MODULE__,
where: q.user_id == ^user_id and q.seen == false
)
|> Repo.aggregate(:count, :id)
end
@notification_types ~w{
favourite
follow
follow_request
mention
move
pleroma:chat_mention
pleroma:emoji_reaction
pleroma:report
reblog
poll
}
def changeset(%Notification{} = notification, attrs) do
notification
|> cast(attrs, [:seen, :type])
|> validate_inclusion(:type, @notification_types)
end
@spec last_read_query(User.t()) :: Ecto.Queryable.t()
def last_read_query(user) do
from(q in Pleroma.Notification,
where: q.user_id == ^user.id,
where: q.seen == true,
select: type(q.id, :string),
limit: 1,
order_by: [desc: :id]
)
end
defp for_user_query_ap_id_opts(user, opts) do
ap_id_relationships =
[:block] ++
if opts[@include_muted_option], do: [], else: [:notification_mute]
preloaded_ap_ids = User.outgoing_relationships_ap_ids(user, ap_id_relationships)
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)
|> join(:inner, [n], activity in assoc(n, :activity))
|> join(:left, [n, a], object in Object,
on:
fragment(
"(?->>'id') = COALESCE(?->'object'->>'id', ?->>'object')",
object.data,
a.data,
a.data
)
)
|> join(:inner, [_n, a], u in User, on: u.ap_id == a.actor, as: :user_actor)
|> preload([n, a, o], activity: {a, object: o})
|> where([user_actor: user_actor], user_actor.is_active)
|> exclude_notification_muted(user, exclude_notification_muted_opts)
|> exclude_blocked(user, exclude_blocked_opts)
|> exclude_filtered(user)
|> exclude_visibility(opts)
end
# Excludes blocked users and non-followed domain-blocked users
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)
|> FollowingRelationship.keep_following_or_not_domain_blocked(user)
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 ThreadMute,
on: tm.user_id == ^user.id and tm.context == fragment("?->>'context'", a.data),
as: :thread_mute
)
|> where([thread_mute: thread_mute], is_nil(thread_mute.user_id))
end
defp exclude_filtered(query, user) do
case Pleroma.Filter.compose_regex(user) do
nil ->
query
regex ->
from([_n, a, o] in query,
where:
fragment("not(?->>'content' ~* ?)", o.data, ^regex) or
fragment("?->>'actor' = ?", o.data, ^user.ap_id)
)
end
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(
"COALESCE((?->'object')->>'id', ?->>'object')",
a.data,
a.data
) ==
fragment(
"COALESCE((?->'object')->>'id', ?->>'object')",
mutated_activity.data,
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,
# Ideally we would preload object and activities here
# but Ecto does not support preloads in update_all
select: n.id
)
{:ok, %{ids: {_, notification_ids}}} =
Multi.new()
|> Multi.update_all(:ids, query, set: [seen: true, updated_at: NaiveDateTime.utc_now()])
|> Marker.multi_set_last_read_id(user, "notifications")
|> Repo.transaction()
for_user_query(user)
|> where([n], n.id in ^notification_ids)
|> Repo.all()
end
@spec read_one(User.t(), String.t()) ::
{:ok, Notification.t()} | {:error, Ecto.Changeset.t()} | nil
def read_one(%User{} = user, notification_id) do
with {:ok, %Notification{} = notification} <- get(user, notification_id) do
Multi.new()
|> Multi.update(:update, changeset(notification, %{seen: true}))
|> Marker.multi_set_last_read_id(user, "notifications")
|> Repo.transaction()
|> case do
{:ok, %{update: notification}} -> {:ok, notification}
{:error, :update, changeset, _} -> {:error, changeset}
end
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(%Pleroma.Activity{} = activity) do
Notification
|> where([n], n.activity_id == ^activity.id)
|> Repo.delete_all()
|> case do
{_, notifications} -> {:ok, notifications}
_ -> {:error, "Cannot dismiss notification"}
end
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
@spec create_notifications(Activity.t(), keyword()) :: {:ok, [Notification.t()] | []}
def create_notifications(activity, options \\ [])
def create_notifications(%Activity{data: %{"to" => _, "type" => "Create"}} = activity, options) do
object = Object.normalize(activity, fetch: false)
if object && object.data["type"] == "Answer" do
{:ok, []}
else
do_create_notifications(activity, options)
end
end
def create_notifications(%Activity{data: %{"type" => type}} = activity, options)
when type in ["Follow", "Like", "Announce", "Move", "EmojiReact", "Flag"] do
do_create_notifications(activity, options)
end
def create_notifications(_, _), do: {:ok, []}
defp do_create_notifications(%Activity{} = activity, options) do
do_send = Keyword.get(options, :do_send, true)
{enabled_receivers, disabled_receivers} = get_notified_from_activity(activity)
potential_receivers = enabled_receivers ++ disabled_receivers
notifications =
Enum.map(potential_receivers, fn user ->
do_send = do_send && user in enabled_receivers
create_notification(activity, user, do_send: do_send)
end)
|> Enum.reject(&is_nil/1)
{:ok, notifications}
end
defp type_from_activity(%{data: %{"type" => type}} = activity) do
case type do
"Follow" ->
if Activity.follow_accepted?(activity) do
"follow"
else
"follow_request"
end
"Announce" ->
"reblog"
"Like" ->
"favourite"
"Move" ->
"move"
"EmojiReact" ->
"pleroma:emoji_reaction"
"Flag" ->
"pleroma:report"
# Compatibility with old reactions
"EmojiReaction" ->
"pleroma:emoji_reaction"
"Create" ->
activity
|> type_from_activity_object()
t ->
raise "No notification type for activity type #{t}"
end
end
defp type_from_activity_object(%{data: %{"type" => "Create", "object" => %{}}}), do: "mention"
defp type_from_activity_object(%{data: %{"type" => "Create"}} = activity) do
object = Object.get_by_ap_id(activity.data["object"])
case object && object.data["type"] do
"ChatMessage" -> "pleroma:chat_mention"
_ -> "mention"
end
end
# TODO move to sql, too.
def create_notification(%Activity{} = activity, %User{} = user, opts \\ []) do
do_send = Keyword.get(opts, :do_send, true)
type = Keyword.get(opts, :type, type_from_activity(activity))
unless skip?(activity, user, opts) do
{:ok, %{notification: notification}} =
Multi.new()
|> Multi.insert(:notification, %Notification{
user_id: user.id,
activity: activity,
seen: mark_as_read?(activity, user),
type: type
})
|> Marker.multi_set_last_read_id(user, "notifications")
|> Repo.transaction()
if do_send do
Streamer.stream(["user", "user:notification"], notification)
Push.send(notification)
end
notification
end
end
def create_poll_notifications(%Activity{} = activity) do
with %Object{data: %{"type" => "Question", "actor" => actor} = data} <-
Object.normalize(activity) do
voters =
case data do
%{"voters" => voters} when is_list(voters) -> voters
_ -> []
end
notifications =
Enum.map([actor | voters], fn ap_id ->
with %User{} = user <- User.get_by_ap_id(ap_id) do
create_notification(activity, user, type: "poll")
end
end)
{:ok, notifications}
end
end
@doc """
Returns a tuple with 2 elements:
{notification-enabled receivers, currently disabled receivers (blocking / [thread] muting)}
NOTE: might be called for FAKE Activities, see ActivityPub.Utils.get_notified_from_object/1
"""
@spec get_notified_from_activity(Activity.t(), boolean()) :: {list(User.t()), list(User.t())}
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", "Flag"] do
potential_receiver_ap_ids = get_potential_receiver_ap_ids(activity)
potential_receivers =
User.get_users_from_set(potential_receiver_ap_ids, local_only: local_only)
notification_enabled_ap_ids =
potential_receiver_ap_ids
|> exclude_domain_blocker_ap_ids(activity, potential_receivers)
|> exclude_relationship_restricted_ap_ids(activity)
|> exclude_thread_muter_ap_ids(activity)
notification_enabled_users =
Enum.filter(potential_receivers, fn u -> u.ap_id in notification_enabled_ap_ids end)
{notification_enabled_users, potential_receivers -- notification_enabled_users}
end
def get_notified_from_activity(_, _local_only), do: {[], []}
# For some activities, only notify the author of the object
def get_potential_receiver_ap_ids(%{data: %{"type" => type, "object" => object_id}})
when type in ~w{Like Announce EmojiReact} do
case Object.get_cached_by_ap_id(object_id) do
%Object{data: %{"actor" => actor}} ->
[actor]
_ ->
[]
end
end
def get_potential_receiver_ap_ids(%{data: %{"type" => "Follow", "object" => object_id}}) do
[object_id]
end
def get_potential_receiver_ap_ids(%{data: %{"type" => "Flag", "actor" => actor}}) do
(User.all_superusers() |> Enum.map(fn user -> user.ap_id end)) -- [actor]
end
def get_potential_receiver_ap_ids(activity) 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()
end
@doc "Filters out AP IDs domain-blocking and not following the activity's actor"
def exclude_domain_blocker_ap_ids(ap_ids, activity, preloaded_users \\ [])
def exclude_domain_blocker_ap_ids([], _activity, _preloaded_users), do: []
def exclude_domain_blocker_ap_ids(ap_ids, %Activity{} = activity, preloaded_users) do
activity_actor_domain = activity.actor && URI.parse(activity.actor).host
users =
ap_ids
|> Enum.map(fn ap_id ->
Enum.find(preloaded_users, &(&1.ap_id == ap_id)) ||
User.get_cached_by_ap_id(ap_id)
end)
|> Enum.filter(& &1)
domain_blocker_ap_ids = for u <- users, activity_actor_domain in u.domain_blocks, do: u.ap_id
domain_blocker_follower_ap_ids =
if Enum.any?(domain_blocker_ap_ids) do
activity
|> Activity.user_actor()
|> FollowingRelationship.followers_ap_ids(domain_blocker_ap_ids)
else
[]
end
ap_ids
|> Kernel.--(domain_blocker_ap_ids)
|> Kernel.++(domain_blocker_follower_ap_ids)
end
@doc "Filters out AP IDs of users basing on their relationships with activity actor user"
def exclude_relationship_restricted_ap_ids([], _activity), do: []
def exclude_relationship_restricted_ap_ids(ap_ids, %Activity{} = activity) do
relationship_restricted_ap_ids =
activity
|> Activity.user_actor()
|> User.incoming_relationships_ungrouped_ap_ids([
:block,
:notification_mute
])
Enum.uniq(ap_ids) -- relationship_restricted_ap_ids
end
@doc "Filters out AP IDs of users who mute activity thread"
def exclude_thread_muter_ap_ids([], _activity), do: []
def exclude_thread_muter_ap_ids(ap_ids, %Activity{} = activity) do
thread_muter_ap_ids = ThreadMute.muter_ap_ids(activity.data["context"])
Enum.uniq(ap_ids) -- thread_muter_ap_ids
end
def skip?(activity, user, opts \\ [])
@spec skip?(Activity.t(), User.t(), Keyword.t()) :: boolean()
def skip?(%Activity{} = activity, %User{} = user, opts) do
[
:self,
:invisible,
:block_from_strangers,
:recently_followed,
:filtered
]
|> Enum.find(&skip?(&1, activity, user, opts))
end
def skip?(_activity, _user, _opts), do: false
@spec skip?(atom(), Activity.t(), User.t(), Keyword.t()) :: boolean()
def skip?(:self, %Activity{} = activity, %User{} = user, opts) do
cond do
opts[:type] == "poll" -> false
activity.data["actor"] == user.ap_id -> true
true -> false
end
end
def skip?(:invisible, %Activity{} = activity, _user, _opts) do
actor = activity.data["actor"]
user = User.get_cached_by_ap_id(actor)
User.invisible?(user)
end
def skip?(
:block_from_strangers,
%Activity{} = activity,
%User{notification_settings: %{block_from_strangers: true}} = user,
opts
) do
actor = activity.data["actor"]
follower = User.get_cached_by_ap_id(actor)
cond do
opts[:type] == "poll" -> false
user.ap_id == actor -> false
!User.following?(follower, user) -> true
true -> false
end
end
# To do: consider defining recency in hours and checking FollowingRelationship with a single SQL
def skip?(
:recently_followed,
%Activity{data: %{"type" => "Follow"}} = activity,
%User{} = user,
_opts
) do
actor = activity.data["actor"]
Notification.for_user(user)
|> Enum.any?(fn
%{activity: %{data: %{"type" => "Follow", "actor" => ^actor}}} -> true
_ -> false
end)
end
def skip?(:filtered, %{data: %{"type" => type}}, _user, _opts) when type in ["Follow", "Move"],
do: false
def skip?(:filtered, activity, user, _opts) do
object = Object.normalize(activity, fetch: false)
cond do
is_nil(object) ->
false
object.data["actor"] == user.ap_id ->
false
not is_nil(regex = Pleroma.Filter.compose_regex(user, :re)) ->
Regex.match?(regex, object.data["content"])
true ->
false
end
end
def skip?(_type, _activity, _user, _opts), do: false
def mark_as_read?(activity, target_user) do
user = Activity.user_actor(activity)
User.mutes_user?(target_user, user) || CommonAPI.thread_muted?(target_user, activity)
end
def for_user_and_activity(user, activity) do
from(n in __MODULE__,
where: n.user_id == ^user.id,
where: n.activity_id == ^activity.id
)
|> Repo.one()
end
@spec mark_context_as_read(User.t(), String.t()) :: {integer(), nil | [term()]}
def mark_context_as_read(%User{id: id}, context) do
from(
n in Notification,
join: a in assoc(n, :activity),
where: n.user_id == ^id,
where: n.seen == false,
where: fragment("?->>'context'", a.data) == ^context
)
|> Repo.update_all(set: [seen: true])
end
end