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Authentication extension for the Ash Framework.
Security advisory:
This version has known vulnerabilities.
View advisories
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Files
lib/ash_authentication/strategies/magic_link/request_preparation.ex
defmodule AshAuthentication.Strategy.MagicLink.RequestPreparation do
@moduledoc """
Prepare a query for a magic link request.
This preparation performs three jobs, one before the query executes and two
after:
1. it constraints the query to match the identity field passed to the action.
2. if there is a user returned by the query, then
a. generate a magic link token and
b. publish a notification.
Always returns an empty result.
"""
use Ash.Resource.Preparation
alias Ash.{Query, Resource.Preparation}
alias AshAuthentication.{Info, Strategy.MagicLink}
require Ash.Query
@doc false
@impl true
@spec prepare(Query.t(), keyword, Preparation.Context.t()) :: Query.t()
def prepare(query, _opts, context) do
strategy = Info.strategy_for_action!(query.resource, query.action.name)
identity_field = strategy.identity_field
identity = Query.get_argument(query, identity_field)
select_for_senders = Info.authentication_select_for_senders!(query.resource)
if is_nil(identity) do
Query.filter(query, false)
else
Query.filter(query, ^ref(identity_field) == ^identity)
end
|> Query.before_action(fn query ->
query
|> Ash.Query.ensure_selected(select_for_senders)
|> Ash.Query.ensure_selected([identity_field])
end)
|> Query.after_action(&after_action(&1, &2, strategy, identity, context))
end
defp after_action(_query, [user], %{sender: {sender, send_opts}} = strategy, _identity, context) do
case MagicLink.request_token_for(strategy, user, [], context) do
{:ok, token} -> sender.send(user, token, Keyword.put(send_opts, :tenant, context.tenant))
_ -> nil
end
{:ok, []}
end
defp after_action(
_query,
_,
%{registration_enabled?: true, sender: {sender, send_opts}} = strategy,
identity,
context
)
when not is_nil(identity) do
case MagicLink.request_token_for_identity(strategy, identity, [], context) do
{:ok, token} ->
sender.send(to_string(identity), token, Keyword.put(send_opts, :tenant, context.tenant))
_ ->
nil
end
{:ok, []}
end
defp after_action(_, _, _, _, _) do
{:ok, []}
end
end