akkoma/lib/pleroma/emails/mailer.ex

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# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Emails.Mailer do
@moduledoc """
Defines the Pleroma mailer.
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The module contains functions to delivery email using Swoosh.Mailer.
"""
alias Pleroma.Workers.MailerWorker
alias Swoosh.DeliveryError
@otp_app :pleroma
@mailer_config [otp: :pleroma]
@spec enabled?() :: boolean()
def enabled?, do: Pleroma.Config.get([__MODULE__, :enabled])
@doc "add email to queue"
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def deliver_async(email, config \\ []) do
encoded_email =
email
|> :erlang.term_to_binary()
|> Base.encode64()
MailerWorker.enqueue("email", %{"encoded_email" => encoded_email, "config" => config})
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end
@doc "callback to perform send email from queue"
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def perform(:deliver_async, email, config), do: deliver(email, config)
@spec deliver(Swoosh.Email.t(), Keyword.t()) :: {:ok, term} | {:error, term}
def deliver(email, config \\ [])
def deliver(email, config) do
case enabled?() do
true -> Swoosh.Mailer.deliver(email, parse_config(config))
false -> {:error, :deliveries_disabled}
end
end
@spec deliver!(Swoosh.Email.t(), Keyword.t()) :: term | no_return
def deliver!(email, config \\ [])
def deliver!(email, config) do
case deliver(email, config) do
{:ok, result} -> result
{:error, reason} -> raise DeliveryError, reason: reason
end
end
@on_load :validate_dependency
@doc false
def validate_dependency do
parse_config([], defaults: false)
|> Keyword.get(:adapter)
|> Swoosh.Mailer.validate_dependency()
end
defp ensure_charlist(input) do
case input do
i when is_binary(i) -> String.to_charlist(input)
i when is_list(i) -> i
end
end
defp default_config(adapter, conf, opts)
defp default_config(_, _, defaults: false) do
[]
end
defp default_config(Swoosh.Adapters.SMTP, conf, _) do
# gen_smtp and Erlang's tls defaults are very barebones, if nothing is set.
# Add sane defaults for our usecase to make config less painful for admins
relay = ensure_charlist(Keyword.get(conf, :relay))
ssl_disabled = Keyword.get(conf, :ssl) === false
os_cacerts = :public_key.cacerts_get()
common_tls_opts = [
cacerts: os_cacerts,
versions: [:"tlsv1.2", :"tlsv1.3"],
verify: :verify_peer,
# some versions have supposedly issues verifying wildcard certs without this
server_name_indication: relay,
# the default of 10 is too restrictive
depth: 32
]
[
auth: :always,
no_mx_lookups: false,
# Direct SSL/TLS
# (if ssl was explicitly disabled, we must not pass TLS options to the socket)
ssl: true,
sockopts: if(ssl_disabled, do: [], else: common_tls_opts),
# STARTTLS upgrade (can't be set to :always when already using direct TLS)
tls: :if_available,
tls_options: common_tls_opts
]
end
defp default_config(_, _, _), do: []
defp parse_config(config, opts \\ []) do
conf = Swoosh.Mailer.parse_config(@otp_app, __MODULE__, @mailer_config, config)
adapter = Keyword.get(conf, :adapter)
default_config(adapter, conf, opts)
|> Keyword.merge(conf)
end
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end