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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)
# Clean up old captchas every few minutes
seconds_retained = Pleroma.Config.get!([__MODULE__, :seconds_retained])
Process.send_after(self(), :cleanup, 1000 * seconds_retained)
{: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
{:reply, method().new(), 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, state) do
:ok = method().cleanup()
seconds_retained = Pleroma.Config.get!([__MODULE__, :seconds_retained])
# Schedule the next clenup
Process.send_after(self(), :cleanup, 1000 * seconds_retained)
{:noreply, state}
end
defp method, do: Pleroma.Config.get!([__MODULE__, :method])
end
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