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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.Web.Push do
   6   use GenServer
   7
   8   alias Pleroma.Web.Push.Impl
   9
  10   require Logger
  11
  12   ##############
  13   # Client API #
  14   ##############
  15
  16   def start_link do
  17     GenServer.start_link(__MODULE__, :ok, name: __MODULE__)
  18   end
  19
  20   def vapid_config do
  21     Application.get_env(:web_push_encryption, :vapid_details, [])
  22   end
  23
  24   def enabled do
  25     case vapid_config() do
  26       [] -> false
  27       list when is_list(list) -> true
  28       _ -> false
  29     end
  30   end
  31
  32   def send(notification),
  33     do: GenServer.cast(__MODULE__, {:send, notification})
  34
  35   ####################
  36   # Server Callbacks #
  37   ####################
  38
  39   @impl true
  40   def init(:ok) do
  41     if enabled() do
  42       {:ok, nil}
  43     else
  44       Logger.warn("""
  45       VAPID key pair is not found. If you wish to enabled web push, please run
  46
  47           mix web_push.gen.keypair
  48
  49       and add the resulting output to your configuration file.
  50       """)
  51
  52       :ignore
  53     end
  54   end
  55
  56   @impl true
  57   def handle_cast({:send, notification}, state) do
  58     if enabled() do
  59       Impl.perform_send(notification)
  60     end
  61
  62     {:noreply, state}
  63   end
  64 end