honkoma/lib/pleroma/notification.ex

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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
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alias Ecto.Multi
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alias Pleroma.Activity
alias Pleroma.FollowingRelationship
alias Pleroma.Marker
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alias Pleroma.Notification
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alias Pleroma.Object
alias Pleroma.Pagination
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alias Pleroma.Repo
alias Pleroma.ThreadMute
alias Pleroma.User
alias Pleroma.Web.CommonAPI.Utils
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alias Pleroma.Web.Push
alias Pleroma.Web.Streamer
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import Ecto.Query
import Ecto.Changeset
require Logger
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@type t :: %__MODULE__{}
@include_muted_option :with_muted
schema "notifications" do
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field(:seen, :boolean, default: false)
belongs_to(:user, User, type: FlakeId.Ecto.CompatType)
belongs_to(:activity, Activity, type: FlakeId.Ecto.CompatType)
timestamps()
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
def changeset(%Notification{} = notification, attrs) do
notification
|> cast(attrs, [:seen])
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)
|> 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:
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fragment(
"(?->>'id') = COALESCE((? -> 'object'::text) ->> 'id'::text)",
object.data,
a.data
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)
)
|> 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)
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)
)
|> where([n, a, o, tm], is_nil(tm.user_id))
end
@valid_visibilities ~w[direct unlisted public private]
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defp exclude_visibility(query, %{exclude_visibilities: visibility})
when is_list(visibility) do
if Enum.all?(visibility, &(&1 in @valid_visibilities)) do
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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
)
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|> 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
)
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)
else
Logger.error("Could not exclude visibility to #{visibility}")
query
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end
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end
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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
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|> for_user_query(opts)
|> Pagination.fetch_paginated(opts)
end
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@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()
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
@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
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query =
from(
n in Notification,
where: n.id == ^id,
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join: activity in assoc(n, :activity),
preload: [activity: activity]
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)
notification = Repo.one(query)
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case notification do
%{user_id: ^user_id} ->
{:ok, notification}
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_ ->
{:error, "Cannot get notification"}
end
end
def clear(user) do
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from(n in Notification, where: n.user_id == ^user.id)
|> Repo.delete_all()
end
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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)
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case notification do
%{user_id: ^user_id} ->
Repo.delete(notification)
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_ ->
{:error, "Cannot dismiss notification"}
end
end
def create_notifications(%Activity{data: %{"to" => _, "type" => "Create"}} = activity) do
object = Object.normalize(activity, false)
if object && object.data["type"] == "Answer" do
{:ok, []}
else
do_create_notifications(activity)
end
end
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def create_notifications(%Activity{data: %{"type" => type}} = activity)
when type in ["Follow", "Like", "Announce", "Move", "EmojiReact"] do
do_create_notifications(activity)
end
def create_notifications(_), do: {:ok, []}
defp do_create_notifications(%Activity{} = activity) do
{enabled_receivers, disabled_receivers} = get_notified_from_activity(activity)
potential_receivers = enabled_receivers ++ disabled_receivers
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notifications =
Enum.map(potential_receivers, fn user ->
do_send = user in enabled_receivers
create_notification(activity, user, do_send)
end)
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{:ok, notifications}
end
# TODO move to sql, too.
def create_notification(%Activity{} = activity, %User{} = user, do_send \\ true) do
unless skip?(activity, user) do
{:ok, %{notification: notification}} =
Multi.new()
|> Multi.insert(:notification, %Notification{user_id: user.id, activity: activity})
|> 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
@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)
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def get_notified_from_activity(%Activity{data: %{"type" => type}} = activity, local_only)
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when type in ["Create", "Like", "Announce", "Follow", "Move", "EmojiReact"] do
potential_receiver_ap_ids = get_potential_receiver_ap_ids(activity)
potential_receivers = User.get_users_from_set(potential_receiver_ap_ids, 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(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
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@spec skip?(Activity.t(), User.t()) :: boolean()
def skip?(%Activity{} = activity, %User{} = user) do
[
:self,
:followers,
:follows,
:non_followers,
:non_follows,
:recently_followed
]
|> Enum.find(&skip?(&1, activity, user))
end
def skip?(_, _), do: false
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@spec skip?(atom(), Activity.t(), User.t()) :: boolean()
def skip?(:self, %Activity{} = activity, %User{} = user) do
activity.data["actor"] == user.ap_id
end
def skip?(
:followers,
%Activity{} = activity,
%User{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{} = activity,
%User{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{} = activity,
%User{notification_settings: %{follows: false}} = user
) do
actor = activity.data["actor"]
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followed = User.get_cached_by_ap_id(actor)
User.following?(user, followed)
end
def skip?(
:non_follows,
%Activity{} = activity,
%User{notification_settings: %{non_follows: false}} = user
) do
actor = activity.data["actor"]
followed = User.get_cached_by_ap_id(actor)
!User.following?(user, followed)
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) 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