debianize-mobilizon/lib/web/email/checker.ex

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defmodule Mobilizon.Web.Email.Checker do
@moduledoc """
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Provides a function to test emails against a "not so bad" regex.
"""
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@email_regex ~r/^[\w.!#$%&*+\-\/=?\^`{|}~]+@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*$/i
@doc """
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Returns whether the email is valid.
"""
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@spec valid?(String.t()) :: boolean
def valid?(email), do: email =~ @email_regex
@spec validate_changeset(Ecto.Changeset.t(), atom()) :: Ecto.Changeset.t()
def validate_changeset(%Ecto.Changeset{} = changeset, key \\ :email) do
changeset = Ecto.Changeset.validate_length(changeset, :email, min: 3, max: 250)
case Ecto.Changeset.fetch_change(changeset, key) do
{:ok, email} ->
if valid?(email),
do: changeset,
else: Ecto.Changeset.add_error(changeset, :email, "Email doesn't fit required format")
:error ->
changeset
end
end
end