def send_via_sendgrid()

in output/mail.py [0:0]
67 lines of code
16 McCabe index (conditional complexity)

    def send_via_sendgrid(self, transport, mail, embedded_images, config):
        api_key = None
        if 'apiKey' in transport:
            api_key = transport['apiKey']
        if os.getenv('SENDGRID_API_KEY'):
            api_key = os.getenv('SENDGRID_API_KEY')
        if not api_key:
            raise NotConfiguredException('No Sendgrid API key configured!')

        sg = sendgrid.SendGridAPIClient(api_key=api_key)
        from_email = sendgrid.Email(mail['mail_from'])
        to_email = sendgrid.To(mail['mail_to'])
        text_content = None
        if mail['text_body'] != '':
            text_content = sendgrid.Content('text/plain', mail['text_body'])
        sendgrid_mail = sendgrid.Mail(from_email, to_email,
                                      mail['mail_subject'], text_content)
        if 'sandbox' in transport and transport['sandbox']:
            self.logger.info(
                'Using Sendgrid sandbox mode (no emails will be sent).')
            sendgrid_mail_settings = sendgrid.MailSettings(
                sandbox_mode=SandBoxMode(True))
            sendgrid_mail.mail_settings = sendgrid_mail_settings
        if mail['html_body'] != '':
            html_content = sendgrid.Content('text/html', mail['html_body'])
            sendgrid_mail.add_content(html_content)
        if len(embedded_images) > 0:
            for file_name, content in embedded_images.items():
                attachment = Attachment()
                attachment.file_content = base64.b64encode(content).decode()
                attachment.file_type = 'application/octet-stream'
                attachment.file_name = file_name
                attachment.disposition = 'inline'
                attachment.content_id = file_name
                sendgrid_mail.attachment = attachment

        if 'attachments' in config['body']:
            for attachment in config['body']['attachments']:
                attachment_template = self.jinja_environment.from_string(
                    attachment)
                attachment_template.name = 'attachment'
                attachment_url = attachment_template.render()
                self.logger.debug('Fetching attachment...',
                                  extra={'attachment': attachment_url})

                filename, content = self._get_attachment(attachment_url)
                if filename:
                    attachment = Attachment()
                    attachment.file_content = base64.b64encode(content).decode()
                    attachment.file_type = 'application/octet-stream'
                    attachment.file_name = filename
                    attachment.disposition = 'attachment'
                    attachment.content_id = filename
                    sendgrid_mail.attachment = attachment

                    self.logger.debug('Attached file.',
                                      extra={
                                          'attachment_filename': filename,
                                          'attachment_size': len(content)
                                      })

        self.logger.debug('Sending email through SendGrid.')
        try:
            response = sg.client.mail.send.post(
                request_body=sendgrid_mail.get())
        except exceptions.BadRequestsError as e:
            self.logger.error('Failed to send via SendGrid (bad request).',
                              extra={'response': e.body})
            raise e
        if response.status_code >= 200 and response.status_code <= 299:
            return True
        return False