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A foundation for building Elixir Phoenix apps — SaaS, social networks, ERP systems, marketplaces, and more
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Files
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Files
lib/phoenix_kit_web/users/forgot_password.ex
defmodule PhoenixKitWeb.Users.ForgotPassword do
@moduledoc """
LiveView for password reset request.
Allows users to request a password reset by providing their email address.
Sends password reset instructions via email if the account exists.
"""
use PhoenixKitWeb, :live_view
alias PhoenixKit.Users.Auth
alias PhoenixKit.Users.RateLimiter
alias PhoenixKit.Utils.Routes
def mount(_params, _session, socket) do
case PhoenixKitWeb.Users.Auth.maybe_redirect_authenticated(socket) do
{:redirect, socket} -> {:ok, socket}
:cont -> {:ok, assign(socket, form: to_form(%{}, as: "user"))}
end
end
def handle_event("send_email", %{"user" => %{"email" => email}}, socket) do
# Rate-limit BEFORE the lookup, and answer identically whatever happens.
# The limiter used to run inside deliver_*, i.e. only for addresses that
# resolved to a user — so past the threshold a registered address got
# "Too many password reset requests" while an unregistered one still got
# the generic notice. That turned the deliberately vague copy into a
# precise account-existence oracle: N+1 requests told you the answer.
#
# `rate_limit: false` because that check is this request's — deliver_* still
# limits by default for callers without one (the admin "send reset link"
# action), and both hit the same per-email bucket, so charging it twice
# would halve a real user's allowance and swallow every second email while
# this page still showed the success notice.
case RateLimiter.check_password_reset_rate_limit(email) do
:ok ->
if user = Auth.get_user_by_email(email) do
Auth.deliver_user_reset_password_instructions(
user,
&Routes.url("/users/reset-password/#{&1}"),
rate_limit: false
)
end
{:error, :rate_limit_exceeded} ->
:throttled
end
info =
"If your email is in our system, you will receive instructions to reset your password shortly."
{:noreply,
socket
|> put_flash(:info, info)
|> redirect(to: "/")}
end
end