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Robust user authentication solution

Security advisory: This version has known vulnerabilities. View advisories
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pow lib pow phoenix mailer mail.ex
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lib/pow/phoenix/mailer/mail.ex 

defmodule Pow.Phoenix.Mailer.Mail do

  @moduledoc """

  Module that renders html and text version of e-mails.

  """

  alias Plug.Conn

  alias Pow.{Config, Plug}



  @type t :: %__MODULE__{}



  defstruct [:user, :subject, :text, :html, :assigns]



  @doc """

  Returns a populated `%Pow.Phoenix.Mailer.Mail{}` map.



  If the configuration has `:web_mailer_module`, it will be used to find the

  template view module to call.

  """

  @spec new(Conn.t(), map(), {module(), atom()}, Keyword.t()) :: t()

  def new(conn, user, {view_module, template}, assigns) do

    config       = Plug.fetch_config(conn)

    web_module   = Config.get(config, :web_mailer_module)

    view_assigns = Keyword.merge([conn: conn, user: user], assigns)



    view_module = Pow.Phoenix.ViewHelpers.build_view_module(view_module, web_module)



    subject = view_module.subject(template, view_assigns)

    text    = view_module.render("#{template}.text", view_assigns)

    html    =

      "#{template}.html"

      |> view_module.render(view_assigns)

      |> Phoenix.Template.HTML.encode_to_iodata!()

      |> IO.iodata_to_binary()



    struct(__MODULE__, user: user, subject: subject, text: text, html: html, assigns: assigns)

  end

end