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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Notification do
   6   use Ecto.Schema
   7   alias Pleroma.{User, Activity, Notification, Repo}
   8   alias Pleroma.Web.CommonAPI.Utils
   9   import Ecto.Query
  10
  11   schema "notifications" do
  12     field(:seen, :boolean, default: false)
  13     belongs_to(:user, User, type: Pleroma.FlakeId)
  14     belongs_to(:activity, Activity, type: Pleroma.FlakeId)
  15
  16     timestamps()
  17   end
  18
  19   # TODO: Make generic and unify (see activity_pub.ex)
  20   defp restrict_max(query, %{"max_id" => max_id}) do
  21     from(activity in query, where: activity.id < ^max_id)
  22   end
  23
  24   defp restrict_max(query, _), do: query
  25
  26   defp restrict_since(query, %{"since_id" => since_id}) do
  27     from(activity in query, where: activity.id > ^since_id)
  28   end
  29
  30   defp restrict_since(query, _), do: query
  31
  32   def for_user(user, opts \\ %{}) do
  33     query =
  34       from(
  35         n in Notification,
  36         where: n.user_id == ^user.id,
  37         order_by: [desc: n.id],
  38         join: activity in assoc(n, :activity),
  39         preload: [activity: activity],
  40         limit: 20
  41       )
  42
  43     query =
  44       query
  45       |> restrict_since(opts)
  46       |> restrict_max(opts)
  47
  48     Repo.all(query)
  49   end
  50
  51   def set_read_up_to(%{id: user_id} = _user, id) do
  52     query =
  53       from(
  54         n in Notification,
  55         where: n.user_id == ^user_id,
  56         where: n.id <= ^id,
  57         update: [
  58           set: [seen: true]
  59         ]
  60       )
  61
  62     Repo.update_all(query, [])
  63   end
  64
  65   def get(%{id: user_id} = _user, id) do
  66     query =
  67       from(
  68         n in Notification,
  69         where: n.id == ^id,
  70         join: activity in assoc(n, :activity),
  71         preload: [activity: activity]
  72       )
  73
  74     notification = Repo.one(query)
  75
  76     case notification do
  77       %{user_id: ^user_id} ->
  78         {:ok, notification}
  79
  80       _ ->
  81         {:error, "Cannot get notification"}
  82     end
  83   end
  84
  85   def clear(user) do
  86     from(n in Notification, where: n.user_id == ^user.id)
  87     |> Repo.delete_all()
  88   end
  89
  90   def dismiss(%{id: user_id} = _user, id) do
  91     notification = Repo.get(Notification, id)
  92
  93     case notification do
  94       %{user_id: ^user_id} ->
  95         Repo.delete(notification)
  96
  97       _ ->
  98         {:error, "Cannot dismiss notification"}
  99     end
 100   end
 101
 102   def create_notifications(%Activity{data: %{"to" => _, "type" => type}} = activity)
 103       when type in ["Create", "Like", "Announce", "Follow"] do
 104     users = get_notified_from_activity(activity)
 105
 106     notifications = Enum.map(users, fn user -> create_notification(activity, user) end)
 107     {:ok, notifications}
 108   end
 109
 110   def create_notifications(_), do: {:ok, []}
 111
 112   # TODO move to sql, too.
 113   def create_notification(%Activity{} = activity, %User{} = user) do
 114     unless User.blocks?(user, %{ap_id: activity.data["actor"]}) or
 115              user.ap_id == activity.data["actor"] or
 116              (activity.data["type"] == "Follow" and
 117                 Enum.any?(Notification.for_user(user), fn notif ->
 118                   notif.activity.data["type"] == "Follow" and
 119                     notif.activity.data["actor"] == activity.data["actor"]
 120                 end)) do
 121       notification = %Notification{user_id: user.id, activity: activity}
 122       {:ok, notification} = Repo.insert(notification)
 123       Pleroma.Web.Streamer.stream("user", notification)
 124       Pleroma.Web.Push.send(notification)
 125       notification
 126     end
 127   end
 128
 129   def get_notified_from_activity(activity, local_only \\ true)
 130
 131   def get_notified_from_activity(
 132         %Activity{data: %{"to" => _, "type" => type} = _data} = activity,
 133         local_only
 134       )
 135       when type in ["Create", "Like", "Announce", "Follow"] do
 136     recipients =
 137       []
 138       |> Utils.maybe_notify_to_recipients(activity)
 139       |> Utils.maybe_notify_mentioned_recipients(activity)
 140       |> Enum.uniq()
 141
 142     User.get_users_from_set(recipients, local_only)
 143   end
 144
 145   def get_notified_from_activity(_, _local_only), do: []
 146 end