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Authentication library for Elixir using Plug
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lib/openmaize/report.ex
defmodule Openmaize.Report do
@moduledoc """
This module provides error and info messages and handles redirects if
the option `redirects` is set to true.
If you are using Phoenix, then the error and info messages will be
sent to `phoenix_flash` to be shown in the web browser.
"""
import Plug.Conn
alias Openmaize.Config
@doc """
Redirect the connection to the login page with an error message.
"""
def handle_error(conn, message) do
redirect_to_login(conn, %{"error" => message})
end
@doc """
Redirect the connection to the user's role's page with an error message.
"""
def handle_error(conn, role, message) do
redirect_to(conn, "#{Config.redirect_pages[role]}", %{"error" => message})
end
@doc """
Redirect the connection to the home page with an info message.
"""
def handle_info(conn, message), do: redirect_to(conn, "/", %{"info" => message})
@doc """
Redirect the connection to the user's role's page with an info message.
"""
def handle_info(conn, role, message) do
redirect_to(conn, "#{Config.redirect_pages[role]}", %{"info" => message})
end
@doc """
Send a json-encoded error message as a response and then halt the connection.
This function will be used if the `redirects` option is set to false.
"""
def send_error(conn, status, message) do
send_resp(conn, status, Poison.encode!(%{"error" => message})) |> terminate
end
@doc """
Return and halt the connection. Also, set the openmaize_skip value to true,
which means that subsequent Openmaize plugs will just return the connection
without performing any further checks.
"""
def terminate(conn), do: conn |> put_private(:openmaize_skip, true) |> halt
defp redirect_to(conn, address, message) do
unless map_size(message) == 0, do: conn = send_message(conn, message)
conn
|> put_resp_header("location", address)
|> send_resp(302, "") |> terminate
end
defp redirect_to_login(conn, message) do
redirect_to(conn, "#{Config.login_dir}/login", message)
end
defp send_message(conn, message) do
if Map.get(conn.private, :phoenix_flash) do
put_private(conn, :phoenix_flash, message)
else
IO.inspect message
conn
end
end
end