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// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package model
import (
"fmt"
"strings"
)
type SlackAttachment struct {
Id int64 `json:"id"`
Fallback string `json:"fallback"`
Color string `json:"color"`
Pretext string `json:"pretext"`
AuthorName string `json:"author_name"`
AuthorLink string `json:"author_link"`
AuthorIcon string `json:"author_icon"`
Title string `json:"title"`
TitleLink string `json:"title_link"`
Text string `json:"text"`
Fields []*SlackAttachmentField `json:"fields"`
ImageURL string `json:"image_url"`
ThumbURL string `json:"thumb_url"`
Footer string `json:"footer"`
FooterIcon string `json:"footer_icon"`
Timestamp interface{} `json:"ts"` // This is either a string or an int64
}
type SlackAttachmentField struct {
Title string `json:"title"`
Value interface{} `json:"value"`
Short bool `json:"short"`
}
type SlackAttachments []*SlackAttachment
// To mention @channel via a webhook in Slack, the message should contain
// <!channel>, as explained at the bottom of this article:
// https://get.slack.help/hc/en-us/articles/202009646-Making-announcements
func ExpandAnnouncement(text string) string {
c1 := "<!channel>"
c2 := "@channel"
if strings.Contains(text, c1) {
return strings.Replace(text, c1, c2, -1)
}
return text
}
// Expand announcements in incoming webhooks from Slack. Those announcements
// can be found in the text attribute, or in the pretext, text, title and value
// attributes of the attachment structure. The Slack attachment structure is
// documented here: https://api.slack.com/docs/attachments
func (a *SlackAttachments) Process() {
var nonNilAttachments []*SlackAttachment
for _, attachment := range *a {
if attachment == nil {
continue
}
nonNilAttachments = append(nonNilAttachments, attachment)
attachment.Pretext = ExpandAnnouncement(attachment.Pretext)
attachment.Text = ExpandAnnouncement(attachment.Text)
attachment.Title = ExpandAnnouncement(attachment.Title)
var nonNilFields []*SlackAttachmentField
for _, field := range attachment.Fields {
if field == nil {
continue
}
nonNilFields = append(nonNilFields, field)
if field.Value != nil {
// Ensure the value is set to a string if it is set
field.Value = ExpandAnnouncement(fmt.Sprintf("%v", field.Value))
}
}
attachment.Fields = nonNilFields
}
*a = nonNilAttachments
}
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