Unknown type messages support

plugin.json

@@ -43,6 +43,14 @@
                 "help_text": "Generated token to validate incoming requests from AWS SNS.",
                 "placeholder": "",
                 "default": null
+            },
+            {
+                "key": "EnableUnknownTypeMessages",
+                "display_name": "Enable unknown type notifications support:",
+                "type": "bool",
+                "help_text": "If the AWS SNS plugin does not support a particular type of SNS notifications, enabling this setting will display those notifications as formatted JSON or plain text.",
+                "placeholder": "",
+                "default": false
             }
         ]
     }

server/configuration.go

@@ -18,9 +18,10 @@ import (
 // If you add non-reference types to your configuration struct, be sure to rewrite Clone as a deep
 // copy appropriate for your types.
 type configuration struct {
-	TeamChannel    string
-	AllowedUserIds string
-	Token          string
+	TeamChannel               string
+	AllowedUserIds            string
+	Token                     string
+	EnableUnknownTypeMessages bool
 }
 
 // Clone shallow copies the configuration. Your implementation may require a deep copy if

server/plugin.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -267,6 +268,10 @@ func (p *Plugin) handleNotification(body io.Reader, channel *TeamChannel) {
 		p.sendPostNotification(p.createSNSMessageNotificationAttachment(notification.Subject, messageNotification), channel)
 		return
 	}
+
+	if p.configuration.EnableUnknownTypeMessages {
+		p.sendPostNotification(p.createSNSUnknownTypeMessage(notification.Subject, notification.Message), channel)
+	}
 }
 
 func (p *Plugin) sendPostNotification(attachment model.SlackAttachment, channel *TeamChannel) {
@@ -372,6 +377,26 @@ func (p *Plugin) createSNSCloudformationEventAttachment(subject string, messageN
 	return attachment
 }
 
+func (p *Plugin) createSNSUnknownTypeMessage(subject string, message string) model.SlackAttachment {
+	p.API.LogDebug("AWSSNS HandleNotification Unknown Type Message", "SUBJECT", subject)
+
+	text := message
+
+	jsonBytes := []byte(message)
+	prettyJSON := &bytes.Buffer{}
+	err := json.Indent(prettyJSON, jsonBytes, "", "  ")
+	if err == nil {
+		text = "```json\n" + prettyJSON.String() + "\n```"
+	}
+
+	post := model.SlackAttachment{
+		Title: subject,
+		Text:  text,
+	}
+
+	return post
+}
+
 func (p *Plugin) createSNSMessageNotificationAttachment(subject string, messageNotification SNSMessageNotification) model.SlackAttachment {
 	p.API.LogDebug("AWSSNS HandleNotification", "MESSAGE", subject)
 	var fields []*model.SlackAttachmentField