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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.Push.Impl do
   6   @moduledoc "The module represents implementation push web notification"
   7
   8   alias Pleroma.Activity
   9   alias Pleroma.Notification
  10   alias Pleroma.Object
  11   alias Pleroma.Repo
  12   alias Pleroma.User
  13   alias Pleroma.Web.Metadata.Utils
  14   alias Pleroma.Web.Push.Subscription
  15
  16   require Logger
  17   import Ecto.Query
  18
  19   @types ["Create", "Follow", "Announce", "Like", "Move"]
  20
  21   @doc "Performs sending notifications for user subscriptions"
  22   @spec perform(Notification.t()) :: list(any) | :error
  23   def perform(
  24         %{
  25           activity: %{data: %{"type" => activity_type}} = activity,
  26           user: %User{id: user_id}
  27         } = notification
  28       )
  29       when activity_type in @types do
  30     actor = User.get_cached_by_ap_id(notification.activity.data["actor"])
  31
  32     mastodon_type = notification.type
  33     gcm_api_key = Application.get_env(:web_push_encryption, :gcm_api_key)
  34     avatar_url = User.avatar_url(actor)
  35     object = Object.normalize(activity, false)
  36     user = User.get_cached_by_id(user_id)
  37     direct_conversation_id = Activity.direct_conversation_id(activity, user)
  38
  39     for subscription <- fetch_subscriptions(user_id),
  40         Subscription.enabled?(subscription, mastodon_type) do
  41       %{
  42         access_token: subscription.token.token,
  43         notification_id: notification.id,
  44         notification_type: mastodon_type,
  45         icon: avatar_url,
  46         preferred_locale: "en",
  47         pleroma: %{
  48           activity_id: notification.activity.id,
  49           direct_conversation_id: direct_conversation_id
  50         }
  51       }
  52       |> Map.merge(build_content(notification, actor, object, mastodon_type))
  53       |> Jason.encode!()
  54       |> push_message(build_sub(subscription), gcm_api_key, subscription)
  55     end
  56     |> (&{:ok, &1}).()
  57   end
  58
  59   def perform(_) do
  60     Logger.warn("Unknown notification type")
  61     {:error, :unknown_type}
  62   end
  63
  64   @doc "Push message to web"
  65   def push_message(body, sub, api_key, subscription) do
  66     case WebPushEncryption.send_web_push(body, sub, api_key) do
  67       {:ok, %{status_code: code}} when 400 <= code and code < 500 ->
  68         Logger.debug("Removing subscription record")
  69         Repo.delete!(subscription)
  70         :ok
  71
  72       {:ok, %{status_code: code}} when 200 <= code and code < 300 ->
  73         :ok
  74
  75       {:ok, %{status_code: code}} ->
  76         Logger.error("Web Push Notification failed with code: #{code}")
  77         :error
  78
  79       _ ->
  80         Logger.error("Web Push Notification failed with unknown error")
  81         :error
  82     end
  83   end
  84
  85   @doc "Gets user subscriptions"
  86   def fetch_subscriptions(user_id) do
  87     Subscription
  88     |> where(user_id: ^user_id)
  89     |> preload(:token)
  90     |> Repo.all()
  91   end
  92
  93   def build_sub(subscription) do
  94     %{
  95       keys: %{
  96         p256dh: subscription.key_p256dh,
  97         auth: subscription.key_auth
  98       },
  99       endpoint: subscription.endpoint
 100     }
 101   end
 102
 103   def build_content(notification, actor, object, mastodon_type \\ nil)
 104
 105   def build_content(
 106         %{
 107           user: %{notification_settings: %{privacy_option: true}}
 108         } = notification,
 109         _actor,
 110         _object,
 111         mastodon_type
 112       ) do
 113     %{body: format_title(notification, mastodon_type)}
 114   end
 115
 116   def build_content(notification, actor, object, mastodon_type) do
 117     mastodon_type = mastodon_type || notification.type
 118
 119     %{
 120       title: format_title(notification, mastodon_type),
 121       body: format_body(notification, actor, object, mastodon_type)
 122     }
 123   end
 124
 125   def format_body(activity, actor, object, mastodon_type \\ nil)
 126
 127   def format_body(_activity, actor, %{data: %{"type" => "ChatMessage", "content" => content}}, _) do
 128     case content do
 129       nil -> "@#{actor.nickname}: (Attachment)"
 130       content -> "@#{actor.nickname}: #{Utils.scrub_html_and_truncate(content, 80)}"
 131     end
 132   end
 133
 134   def format_body(
 135         %{activity: %{data: %{"type" => "Create"}}},
 136         actor,
 137         %{data: %{"content" => content}},
 138         _mastodon_type
 139       ) do
 140     "@#{actor.nickname}: #{Utils.scrub_html_and_truncate(content, 80)}"
 141   end
 142
 143   def format_body(
 144         %{activity: %{data: %{"type" => "Announce"}}},
 145         actor,
 146         %{data: %{"content" => content}},
 147         _mastodon_type
 148       ) do
 149     "@#{actor.nickname} repeated: #{Utils.scrub_html_and_truncate(content, 80)}"
 150   end
 151
 152   def format_body(
 153         %{activity: %{data: %{"type" => type}}} = notification,
 154         actor,
 155         _object,
 156         mastodon_type
 157       )
 158       when type in ["Follow", "Like"] do
 159     mastodon_type = mastodon_type || notification.type
 160
 161     case mastodon_type do
 162       "follow" -> "@#{actor.nickname} has followed you"
 163       "follow_request" -> "@#{actor.nickname} has requested to follow you"
 164       "favourite" -> "@#{actor.nickname} has favorited your post"
 165     end
 166   end
 167
 168   def format_title(activity, mastodon_type \\ nil)
 169
 170   def format_title(%{activity: %{data: %{"directMessage" => true}}}, _mastodon_type) do
 171     "New Direct Message"
 172   end
 173
 174   def format_title(%{type: type}, mastodon_type) do
 175     case mastodon_type || type do
 176       "mention" -> "New Mention"
 177       "follow" -> "New Follower"
 178       "follow_request" -> "New Follow Request"
 179       "reblog" -> "New Repeat"
 180       "favourite" -> "New Favorite"
 181       "pleroma:chat_mention" -> "New Chat Message"
 182       type -> "New #{String.capitalize(type || "event")}"
 183     end
 184   end
 185 end