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A foundation for building Elixir Phoenix apps — SaaS, social networks, ERP systems, marketplaces, and more
Current section
Files
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Current section
Files
lib/phoenix_kit_web/users/login.ex
defmodule PhoenixKitWeb.Users.Login do
@moduledoc """
LiveView for user authentication.
Provides login functionality with support for both traditional password-based
authentication and magic link login. Tracks anonymous visitor sessions and
respects system authentication settings.
"""
use PhoenixKitWeb, :live_view
alias PhoenixKit.Admin.Presence
alias PhoenixKit.Settings
alias PhoenixKit.Utils.Date, as: UtilsDate
alias PhoenixKit.Utils.IpAddress
alias PhoenixKit.Utils.Routes
alias PhoenixKitWeb.Users.Auth
def mount(params, session, socket) do
case Auth.maybe_redirect_authenticated(socket) do
{:redirect, socket} ->
{:ok, socket}
:cont ->
# Track anonymous visitor session
if connected?(socket) do
session_id = session["live_socket_id"] || generate_session_id()
Presence.track_anonymous(session_id, %{
connected_at: UtilsDate.utc_now(),
ip_address: IpAddress.extract_from_socket(socket),
user_agent: get_connect_info(socket, :user_agent),
current_page: Routes.path("/users/log-in")
})
end
# Get project title from settings (with Config fallback)
project_title = PhoenixKit.Settings.get_project_title()
allow_registration = Settings.get_boolean_setting("allow_registration", true)
magic_link_enabled = Settings.get_boolean_setting("magic_link_login_enabled", true)
# Support both old :email flash and new :email_or_username flash for backwards compatibility
email_or_username =
Phoenix.Flash.get(socket.assigns.flash, :email_or_username) ||
Phoenix.Flash.get(socket.assigns.flash, :email)
form = to_form(%{"email_or_username" => email_or_username}, as: "user")
# Support return_to query param for post-login redirect (e.g., from guest checkout)
return_to = sanitize_return_to(params["return_to"])
socket =
assign(socket,
form: form,
project_title: project_title,
allow_registration: allow_registration,
magic_link_enabled: magic_link_enabled,
return_to: return_to
)
{:ok, socket, temporary_assigns: [form: form]}
end
end
defp generate_session_id do
:crypto.strong_rand_bytes(16) |> Base.encode64()
end
# Only allow relative paths to prevent open redirect attacks
defp sanitize_return_to(path) do
if Routes.local_path?(path), do: path, else: nil
end
end