feat: port basic functionality to elixir

lib/components_elixir/auth.ex

@@ -0,0 +1,67 @@
+defmodule ComponentsElixir.Auth do
+  @moduledoc """
+  Simple authentication system for the components inventory.
+
+  Uses a configured password for authentication with session management.
+  """
+
+  @doc """
+  Validates the provided password against the configured password.
+  """
+  def authenticate(password) do
+    configured_password = Application.get_env(:components_elixir, :auth_password, "changeme")
+
+    if password == configured_password do
+      {:ok, :authenticated}
+    else
+      {:error, :invalid_credentials}
+    end
+  end
+
+  @doc """
+  Checks if the current session is authenticated.
+  """
+  def authenticated?(conn_or_socket_or_session) do
+    case get_session_value(conn_or_socket_or_session, :authenticated) do
+      true -> true
+      _ -> false
+    end
+  end
+
+  @doc """
+  Marks the session as authenticated.
+  """
+  def sign_in(conn_or_socket) do
+    put_session_value(conn_or_socket, :authenticated, true)
+  end
+
+  @doc """
+  Clears the authentication from the session.
+  """
+  def sign_out(conn_or_socket) do
+    put_session_value(conn_or_socket, :authenticated, nil)
+  end
+
+  # Helper functions to handle both Plug.Conn and Phoenix.LiveView.Socket
+  defp get_session_value(%Plug.Conn{} = conn, key) do
+    Plug.Conn.get_session(conn, key)
+  end
+
+  defp get_session_value(%Phoenix.LiveView.Socket{} = socket, key) do
+    get_in(socket.assigns, [:session, key])
+  end
+
+  defp get_session_value(session, key) when is_map(session) do
+    # Handle both string and atom keys
+    Map.get(session, to_string(key)) || Map.get(session, key)
+  end
+
+  defp put_session_value(%Plug.Conn{} = conn, key, value) do
+    Plug.Conn.put_session(conn, key, value)
+  end
+
+  defp put_session_value(%Phoenix.LiveView.Socket{} = socket, key, value) do
+    session = Map.put(socket.assigns[:session] || %{}, key, value)
+    Phoenix.LiveView.assign(socket, session: session)
+  end
+end