PLT-5800 Cleaned up duplicated code for adding slack attachments to posts (#5711)

app/webhook.go

@@ -150,37 +150,8 @@ func CreateWebhookPost(userId, teamId, channelId, text, overrideUsername, overri
 	if len(props) > 0 {
 		for key, val := range props {
 			if key == "attachments" {
-				if list, success := val.([]interface{}); success {
-					// parse attachment links into Markdown format
-					for i, aInt := range list {
-						attachment := aInt.(map[string]interface{})
-						if aText, ok := attachment["text"].(string); ok {
-							aText = linkWithTextRegex.ReplaceAllString(aText, "[${2}](${1})")
-							attachment["text"] = aText
-							list[i] = attachment
-						}
-						if aText, ok := attachment["pretext"].(string); ok {
-							aText = linkWithTextRegex.ReplaceAllString(aText, "[${2}](${1})")
-							attachment["pretext"] = aText
-							list[i] = attachment
-						}
-						if fVal, ok := attachment["fields"]; ok {
-							if fields, ok := fVal.([]interface{}); ok {
-								// parse attachment field links into Markdown format
-								for j, fInt := range fields {
-									field := fInt.(map[string]interface{})
-									if fValue, ok := field["value"].(string); ok {
-										fValue = linkWithTextRegex.ReplaceAllString(fValue, "[${2}](${1})")
-										field["value"] = fValue
-										fields[j] = field
-									}
-								}
-								attachment["fields"] = fields
-								list[i] = attachment
-							}
-						}
-					}
-					post.AddProp(key, list)
+				if attachments, success := val.([]*model.SlackAttachment); success {
+					parseSlackAttachment(post, attachments)
 				}
 			} else if key != "override_icon_url" && key != "override_username" && key != "from_webhook" {
 				post.AddProp(key, val)
@@ -452,7 +423,7 @@ func HandleIncomingWebhook(hookId string, req *model.IncomingWebhookRequest, sit
 	webhookType := req.Type
 
 	// attachments is in here for slack compatibility
-	if req.Attachments != nil {
+	if len(req.Attachments) > 0 {
 		if len(req.Props) == 0 {
 			req.Props = make(model.StringInterface)
 		}