akkoma/lib/pleroma/captcha/captcha.ex
2018-12-16 22:08:17 +03:00

64 lines
1.5 KiB
Elixir

defmodule Pleroma.Captcha do
use GenServer
@ets_options [:ordered_set, :private, :named_table, {:read_concurrency, true}]
@doc false
def start_link() do
GenServer.start_link(__MODULE__, [], name: __MODULE__)
end
@doc false
def init(_) do
# Create a ETS table to store captchas
ets_name = Module.concat(method(), Ets)
^ets_name = :ets.new(Module.concat(method(), Ets), @ets_options)
{:ok, nil}
end
@doc """
Ask the configured captcha service for a new captcha
"""
def new() do
GenServer.call(__MODULE__, :new)
end
@doc """
Ask the configured captcha service to validate the captcha
"""
def validate(token, captcha) do
GenServer.call(__MODULE__, {:validate, token, captcha})
end
@doc false
def handle_call(:new, _from, state) do
enabled = Pleroma.Config.get([__MODULE__, :enabled])
if !enabled do
{:reply, %{type: :none}, state}
else
new_captcha = method().new()
minutes_retained = Pleroma.Config.get!([__MODULE__, :minutes_retained])
# Wait several minutes and if the captcha is still there, delete it
Process.send_after(self(), {:cleanup, new_captcha.token}, 1000 * 60 * minutes_retained)
{:reply, new_captcha, state}
end
end
@doc false
def handle_call({:validate, token, captcha}, _from, state) do
{:reply, method().validate(token, captcha), state}
end
@doc false
def handle_info({:cleanup, token}, state) do
method().cleanup(token)
{:noreply, state}
end
defp method, do: Pleroma.Config.get!([__MODULE__, :method])
end