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0.1.0
Compose, deliver and test your emails easily in Elixir. Supports SMTP, Sendgrid, Mandrill, Postmark, Mailgun and many more out of the box. Preview your emails in the browser. Test your email sending code.
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Files
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Files
lib/swoosh/adapters/smtp/helpers.ex
defmodule Swoosh.Adapters.SMTP.Helpers do
@moduledoc false
alias Swoosh.Email
import Swoosh.Email.Render
@doc false
def sender(%Email{} = email) do
email.headers["Sender"] || elem(email.from, 1)
end
@doc false
def body(email, config) do
{type, subtype, headers, parts} = prepare_message(email)
options = prepare_options(config)
:mimemail.encode({type, subtype, headers, [], parts}, options)
end
@doc false
def prepare_message(email) do
email
|> prepare_headers()
|> prepare_parts(email)
end
@doc false
def prepare_options(config) do
case config[:dkim] do
nil -> []
dkim -> [dkim: dkim]
end
end
defp prepare_headers(email) do
[]
|> prepare_additional_headers(email)
|> prepare_mime_version
|> prepare_reply_to(email)
|> prepare_subject(email)
|> prepare_bcc(email)
|> prepare_cc(email)
|> prepare_to(email)
|> prepare_from(email)
end
defp prepare_subject(headers, %{subject: subject}), do: [{"Subject", subject} | headers]
defp prepare_from(headers, %{from: from}), do: [{"From", render_recipient(from)} | headers]
defp prepare_to(headers, %{to: to}), do: [{"To", render_recipient(to)} | headers]
defp prepare_cc(headers, %{cc: []}), do: headers
defp prepare_cc(headers, %{cc: cc}), do: [{"Cc", render_recipient(cc)} | headers]
defp prepare_bcc(headers, %{bcc: []}), do: headers
defp prepare_bcc(headers, %{bcc: bcc}), do: [{"Bcc", render_recipient(bcc)} | headers]
defp prepare_reply_to(headers, %{reply_to: nil}), do: headers
defp prepare_reply_to(headers, %{reply_to: reply_to}),
do: [{"Reply-To", render_recipient(reply_to)} | headers]
defp prepare_mime_version(headers), do: [{"Mime-Version", "1.0"} | headers]
defp prepare_additional_headers(headers, %{headers: additional_headers}) do
Map.to_list(additional_headers) ++ headers
end
defp prepare_parts(headers, %{
attachments: [],
html_body: html_body,
text_body: text_body
}) do
case {text_body, html_body} do
{text_body, nil} ->
headers = [{"Content-Type", "text/plain; charset=\"utf-8\""} | headers]
{"text", "plain", headers, text_body}
{nil, html_body} ->
headers = [{"Content-Type", "text/html; charset=\"utf-8\""} | headers]
{"text", "html", headers, html_body}
{text_body, html_body} ->
parts = [prepare_part(:plain, text_body), prepare_part(:html, html_body)]
{"multipart", "alternative", headers, parts}
end
end
defp prepare_parts(headers, %{
attachments: attachments,
html_body: html_body,
text_body: text_body
}) do
content_part =
case {prepare_part(:plain, text_body), prepare_part(:html, html_body)} do
{text_part, nil} ->
text_part
{nil, html_part} ->
html_part
{text_part, html_part} ->
{"multipart", "alternative", [], [], [text_part, html_part]}
end
attachment_parts = Enum.map(attachments, &prepare_attachment(&1))
{"multipart", "mixed", headers, [content_part | attachment_parts]}
end
defp prepare_part(_subtype, nil), do: nil
defp prepare_part(subtype, content) do
subtype_string = to_string(subtype)
{"text", subtype_string,
[
{"Content-Type", "text/#{subtype_string}; charset=\"utf-8\""},
{"Content-Transfer-Encoding", "quoted-printable"}
],
[
{"content-type-params", [{"charset", "utf-8"}]},
{"disposition", "inline"},
{"disposition-params", []}
], content}
end
defp prepare_attachment(
%{
filename: filename,
content_type: content_type,
type: attachment_type,
headers: custom_headers
} = attachment
) do
[type, format] = String.split(content_type, "/")
content = Swoosh.Attachment.get_content(attachment)
case attachment_type do
:attachment ->
{
type,
format,
[
{"Content-Transfer-Encoding", "base64"}
| custom_headers
],
[
{"disposition", "attachment"},
{"disposition-params", [{"filename", filename}]}
],
content
}
:inline ->
{
type,
format,
[
{"Content-Transfer-Encoding", "base64"},
{"Content-Id", "<#{filename}>"}
| custom_headers
],
[
{"content-type-params", []},
{"disposition", "inline"},
{"disposition-params", []}
],
content
}
end
end
end