git.squeep.com Git - akkoma/blob - lib/pleroma/captcha/captcha.ex

   1 defmodule Pleroma.Captcha do
   2   use GenServer
   3
   4   @ets_options [:ordered_set, :private, :named_table, {:read_concurrency, true}]
   5
   6   @doc false
   7   def start_link() do
   8     GenServer.start_link(__MODULE__, [], name: __MODULE__)
   9   end
  10
  11   @doc false
  12   def init(_) do
  13     # Create a ETS table to store captchas
  14     ets_name = Module.concat(method(), Ets)
  15     ^ets_name = :ets.new(Module.concat(method(), Ets), @ets_options)
  16
  17     {:ok, nil}
  18   end
  19
  20   @doc """
  21   Ask the configured captcha service for a new captcha
  22   """
  23   def new() do
  24     GenServer.call(__MODULE__, :new)
  25   end
  26
  27   @doc """
  28   Ask the configured captcha service to validate the captcha
  29   """
  30   def validate(token, captcha) do
  31     GenServer.call(__MODULE__, {:validate, token, captcha})
  32   end
  33
  34   @doc false
  35   def handle_call(:new, _from, state) do
  36     enabled = Pleroma.Config.get([__MODULE__, :enabled])
  37
  38     if !enabled do
  39       {:reply, %{type: :none}, state}
  40     else
  41       new_captcha = method().new()
  42
  43       seconds_retained = Pleroma.Config.get!([__MODULE__, :seconds_retained])
  44       # Wait several minutes and if the captcha is still there, delete it
  45       Process.send_after(self(), {:cleanup, new_captcha.token}, 1000 * seconds_retained)
  46
  47       {:reply, new_captcha, state}
  48     end
  49   end
  50
  51   @doc false
  52   def handle_call({:validate, token, captcha}, _from, state) do
  53     {:reply, method().validate(token, captcha), state}
  54   end
  55
  56   @doc false
  57   def handle_info({:cleanup, token}, state) do
  58     method().cleanup(token)
  59
  60     {:noreply, state}
  61   end
  62
  63   defp method, do: Pleroma.Config.get!([__MODULE__, :method])
  64 end