fun prepareMimeMessage()

in notifications/core/src/main/kotlin/org/opensearch/notifications/core/client/EmailMimeProvider.kt [30:97]
41 lines of code
7 McCabe index (conditional complexity)

    fun prepareMimeMessage(
        session: Session,
        fromAddress: String,
        recipient: String,
        messageContent: MessageContent
    ): MimeMessage {
        // Create a new MimeMessage object
        val mimeMessage = MimeMessage(session)

        // Add from:
        mimeMessage.setFrom(fromAddress)

        // Add to:
        mimeMessage.setRecipients(Message.RecipientType.TO, recipient)

        // Add Subject:
        mimeMessage.setSubject(messageContent.title, "UTF-8")

        // Create a multipart/alternative child container
        val msgBody = MimeMultipart("alternative")

        // Create a wrapper for the HTML and text parts
        val bodyWrapper = MimeBodyPart()

        // Define the text part (if html part does not exists then use "-" string
        val textPart = MimeBodyPart()
        textPart.setContent(messageContent.textDescription, "text/plain; charset=UTF-8")
        // Add the text part to the child container
        msgBody.addBodyPart(textPart)

        // Define the HTML part
        if (messageContent.htmlDescription != null) {
            val htmlPart = MimeBodyPart()
            htmlPart.setContent(messageContent.htmlDescription, "text/html; charset=UTF-8")
            // Add the HTML part to the child container
            msgBody.addBodyPart(htmlPart)
        }
        // Add the child container to the wrapper object
        bodyWrapper.setContent(msgBody)

        // Create a multipart/mixed parent container
        val msg = MimeMultipart("mixed")

        // Add the parent container to the mimeMessage
        mimeMessage.setContent(msg)

        // Add the multipart/alternative part to the mimeMessage
        msg.addBodyPart(bodyWrapper)

        @SuppressWarnings("ComplexCondition")
        if (messageContent.fileName != null &&
            messageContent.fileData != null &&
            messageContent.fileContentType != null &&
            messageContent.fileEncoding != null
        ) {
            // Add the attachment to the mimeMessage
            var attachmentMime: MimeBodyPart? = null
            when (messageContent.fileEncoding) {
                "text" -> attachmentMime = createTextAttachmentPart(messageContent)
                "base64" -> attachmentMime = createBinaryAttachmentPart(messageContent)
            }
            if (attachmentMime != null) {
                msg.addBodyPart(attachmentMime)
            }
        }

        return mimeMessage
    }