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swoosh
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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/postmark.ex
defmodule Swoosh.Adapters.Postmark do
@moduledoc ~S"""
An adapter that sends email using the Postmark API.
For reference: [Postmark API docs](http://developer.postmarkapp.com/developer-send-api.html)
## Example
# config/config.exs
config :sample, Sample.Mailer,
adapter: Swoosh.Adapters.Postmark,
api_key: "my-api-key"
# lib/sample/mailer.ex
defmodule Sample.Mailer do
use Swoosh.Mailer, otp_app: :sample
end
"""
use Swoosh.Adapter, required_config: [:api_key]
alias Swoosh.Email
import Swoosh.Email.Render
@base_url "https://api.postmarkapp.com"
@api_endpoint "/email"
def deliver(%Email{} = email, config \\ []) do
headers = prepare_headers(config)
params = email |> prepare_body |> Poison.encode!
url = [base_url(config), api_endpoint(email)]
case :hackney.post(url, headers, params, [:with_body]) do
{:ok, 200, _headers, body} ->
{:ok, %{id: Poison.decode!(body)["MessageID"]}}
{:ok, code, _headers, body} when code > 399 ->
{:error, {code, Poison.decode!(body)}}
{:error, reason} ->
{:error, reason}
end
end
defp base_url(config), do: config[:base_url] || @base_url
defp prepare_headers(config) do
[{"User-Agent", "swoosh/#{Swoosh.version}"},
{"X-Postmark-Server-Token", config[:api_key]},
{"Content-Type", "application/json"},
{"Accept", "application/json"}]
end
defp api_endpoint(%{provider_options: %{template_id: _, template_model: _}}),
do: @api_endpoint <> "/withTemplate"
defp api_endpoint(_email),
do: @api_endpoint
defp prepare_body(email) do
%{}
|> prepare_from(email)
|> prepare_to(email)
|> prepare_subject(email)
|> prepare_html(email)
|> prepare_text(email)
|> prepare_cc(email)
|> prepare_bcc(email)
|> prepare_attachments(email)
|> prepare_reply_to(email)
|> prepare_template(email)
|> prepare_custom_headers(email)
end
defp prepare_from(body, %{from: from}), do: Map.put(body, "From", render_recipient(from))
defp prepare_to(body, %{to: to}), do: Map.put(body, "To", render_recipient(to))
defp prepare_cc(body, %{cc: []}), do: body
defp prepare_cc(body, %{cc: cc}), do: Map.put(body, "Cc", render_recipient(cc))
defp prepare_bcc(body, %{bcc: []}), do: body
defp prepare_bcc(body, %{bcc: bcc}), do: Map.put(body, "Bcc", render_recipient(bcc))
defp prepare_attachments(body, %{attachments: []}), do: body
defp prepare_attachments(body, %{attachments: attachments}) do
Map.put(body, "Attachments", Enum.map(attachments, &prepare_attachment/1))
end
defp prepare_attachment(attachment) do
attachment_data = %{
"Name" => attachment.filename,
"ContentType" => attachment.content_type,
"Content" => attachment.path |> File.read! |> Base.encode64,
}
case attachment.type do
:attachment ->
attachment_data
:inline ->
Map.put(attachment_data, "ContentID", "cid:#{attachment.filename}")
end
end
defp prepare_reply_to(body, %{reply_to: nil}), do: body
defp prepare_reply_to(body, %{reply_to: {_name, address}}), do: Map.put(body, "ReplyTo", address)
defp prepare_subject(body, %{subject: ""}), do: body
defp prepare_subject(body, %{subject: subject}), do: Map.put(body, "Subject", subject)
defp prepare_text(body, %{text_body: nil}), do: body
defp prepare_text(body, %{text_body: text_body}), do: Map.put(body, "TextBody", text_body)
defp prepare_html(body, %{html_body: nil}), do: body
defp prepare_html(body, %{html_body: html_body}), do: Map.put(body, "HtmlBody", html_body)
# example custom vars
#
# %{
# "template_id" => 123,
# "template_model" => %{"name": 1, "company": 2}
# }
defp prepare_template(body, %{provider_options: provider_options}),
do: Enum.reduce(provider_options, body, &put_in_body/2)
defp prepare_template(body, _email), do: body
defp put_in_body({:template_model, val}, body_acc),
do: Map.put(body_acc, "TemplateModel", val)
defp put_in_body({:template_id, val}, body_acc),
do: Map.put(body_acc, "TemplateId", val)
defp put_in_body(_, body_acc), do: body_acc
defp prepare_custom_headers(body, %{headers: headers}) when map_size(headers) == 0, do: body
defp prepare_custom_headers(body, %{headers: headers}) do
custom_headers = Enum.map(headers, fn {k, v} -> %{"Name" => k, "Value" => v} end)
Map.put(body, "Headers", custom_headers)
end
end