forgejo/services/webhook/slack.go
2024-04-22 14:41:17 +00:00

362 lines
11 KiB
Go

// Copyright 2014 The Gogs Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package webhook
import (
"context"
"fmt"
"html/template"
"net/http"
"regexp"
"strings"
webhook_model "code.gitea.io/gitea/models/webhook"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
api "code.gitea.io/gitea/modules/structs"
webhook_module "code.gitea.io/gitea/modules/webhook"
gitea_context "code.gitea.io/gitea/services/context"
"code.gitea.io/gitea/services/forms"
"code.gitea.io/gitea/services/webhook/shared"
"gitea.com/go-chi/binding"
)
type slackHandler struct{}
func (slackHandler) Type() webhook_module.HookType { return webhook_module.SLACK }
func (slackHandler) Icon(size int) template.HTML { return shared.ImgIcon("slack.png", size) }
type slackForm struct {
forms.WebhookCoreForm
PayloadURL string `binding:"Required;ValidUrl"`
Channel string `binding:"Required"`
Username string
IconURL string
Color string
}
var _ binding.Validator = &slackForm{}
// Validate implements binding.Validator.
func (s *slackForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
ctx := gitea_context.GetWebContext(req)
if !IsValidSlackChannel(strings.TrimSpace(s.Channel)) {
errs = append(errs, binding.Error{
FieldNames: []string{"Channel"},
Classification: "",
Message: ctx.Locale.TrString("repo.settings.add_webhook.invalid_channel_name"),
})
}
return errs
}
func (slackHandler) UnmarshalForm(bind func(any)) forms.WebhookForm {
var form slackForm
bind(&form)
return forms.WebhookForm{
WebhookCoreForm: form.WebhookCoreForm,
URL: form.PayloadURL,
ContentType: webhook_model.ContentTypeJSON,
Secret: "",
HTTPMethod: http.MethodPost,
Metadata: &SlackMeta{
Channel: strings.TrimSpace(form.Channel),
Username: form.Username,
IconURL: form.IconURL,
Color: form.Color,
},
}
}
// SlackMeta contains the slack metadata
type SlackMeta struct {
Channel string `json:"channel"`
Username string `json:"username"`
IconURL string `json:"icon_url"`
Color string `json:"color"`
}
// Metadata returns slack metadata
func (slackHandler) Metadata(w *webhook_model.Webhook) any {
s := &SlackMeta{}
if err := json.Unmarshal([]byte(w.Meta), s); err != nil {
log.Error("slackHandler.Metadata(%d): %v", w.ID, err)
}
return s
}
// SlackPayload contains the information about the slack channel
type SlackPayload struct {
Channel string `json:"channel"`
Text string `json:"text"`
Username string `json:"username"`
IconURL string `json:"icon_url"`
UnfurlLinks int `json:"unfurl_links"`
LinkNames int `json:"link_names"`
Attachments []SlackAttachment `json:"attachments"`
}
// SlackAttachment contains the slack message
type SlackAttachment struct {
Fallback string `json:"fallback"`
Color string `json:"color"`
Title string `json:"title"`
TitleLink string `json:"title_link"`
Text string `json:"text"`
}
// SlackTextFormatter replaces &, <, > with HTML characters
// see: https://api.slack.com/docs/formatting
func SlackTextFormatter(s string) string {
// replace & < >
s = strings.ReplaceAll(s, "&", "&amp;")
s = strings.ReplaceAll(s, "<", "&lt;")
s = strings.ReplaceAll(s, ">", "&gt;")
return s
}
// SlackShortTextFormatter replaces &, <, > with HTML characters
func SlackShortTextFormatter(s string) string {
s = strings.Split(s, "\n")[0]
// replace & < >
s = strings.ReplaceAll(s, "&", "&amp;")
s = strings.ReplaceAll(s, "<", "&lt;")
s = strings.ReplaceAll(s, ">", "&gt;")
return s
}
// SlackLinkFormatter creates a link compatible with slack
func SlackLinkFormatter(url, text string) string {
return fmt.Sprintf("<%s|%s>", url, SlackTextFormatter(text))
}
// SlackLinkToRef slack-formatter link to a repo ref
func SlackLinkToRef(repoURL, ref string) string {
// FIXME: SHA1 hardcoded here
url := git.RefURL(repoURL, ref)
refName := git.RefName(ref).ShortName()
return SlackLinkFormatter(url, refName)
}
// Create implements payloadConvertor Create method
func (s slackConvertor) Create(p *api.CreatePayload) (SlackPayload, error) {
repoLink := SlackLinkFormatter(p.Repo.HTMLURL, p.Repo.FullName)
refLink := SlackLinkToRef(p.Repo.HTMLURL, p.Ref)
text := fmt.Sprintf("[%s:%s] %s created by %s", repoLink, refLink, p.RefType, p.Sender.UserName)
return s.createPayload(text, nil), nil
}
// Delete composes Slack payload for delete a branch or tag.
func (s slackConvertor) Delete(p *api.DeletePayload) (SlackPayload, error) {
refName := git.RefName(p.Ref).ShortName()
repoLink := SlackLinkFormatter(p.Repo.HTMLURL, p.Repo.FullName)
text := fmt.Sprintf("[%s:%s] %s deleted by %s", repoLink, refName, p.RefType, p.Sender.UserName)
return s.createPayload(text, nil), nil
}
// Fork composes Slack payload for forked by a repository.
func (s slackConvertor) Fork(p *api.ForkPayload) (SlackPayload, error) {
baseLink := SlackLinkFormatter(p.Forkee.HTMLURL, p.Forkee.FullName)
forkLink := SlackLinkFormatter(p.Repo.HTMLURL, p.Repo.FullName)
text := fmt.Sprintf("%s is forked to %s", baseLink, forkLink)
return s.createPayload(text, nil), nil
}
// Issue implements payloadConvertor Issue method
func (s slackConvertor) Issue(p *api.IssuePayload) (SlackPayload, error) {
text, issueTitle, attachmentText, color := getIssuesPayloadInfo(p, SlackLinkFormatter, true)
var attachments []SlackAttachment
if attachmentText != "" {
attachmentText = SlackTextFormatter(attachmentText)
issueTitle = SlackTextFormatter(issueTitle)
attachments = append(attachments, SlackAttachment{
Color: fmt.Sprintf("%x", color),
Title: issueTitle,
TitleLink: p.Issue.HTMLURL,
Text: attachmentText,
})
}
return s.createPayload(text, attachments), nil
}
// IssueComment implements payloadConvertor IssueComment method
func (s slackConvertor) IssueComment(p *api.IssueCommentPayload) (SlackPayload, error) {
text, issueTitle, color := getIssueCommentPayloadInfo(p, SlackLinkFormatter, true)
return s.createPayload(text, []SlackAttachment{{
Color: fmt.Sprintf("%x", color),
Title: issueTitle,
TitleLink: p.Comment.HTMLURL,
Text: SlackTextFormatter(p.Comment.Body),
}}), nil
}
// Wiki implements payloadConvertor Wiki method
func (s slackConvertor) Wiki(p *api.WikiPayload) (SlackPayload, error) {
text, _, _ := getWikiPayloadInfo(p, SlackLinkFormatter, true)
return s.createPayload(text, nil), nil
}
// Release implements payloadConvertor Release method
func (s slackConvertor) Release(p *api.ReleasePayload) (SlackPayload, error) {
text, _ := getReleasePayloadInfo(p, SlackLinkFormatter, true)
return s.createPayload(text, nil), nil
}
func (s slackConvertor) Package(p *api.PackagePayload) (SlackPayload, error) {
text, _ := getPackagePayloadInfo(p, SlackLinkFormatter, true)
return s.createPayload(text, nil), nil
}
// Push implements payloadConvertor Push method
func (s slackConvertor) Push(p *api.PushPayload) (SlackPayload, error) {
// n new commits
var (
commitDesc string
commitString string
)
if p.TotalCommits == 1 {
commitDesc = "1 new commit"
} else {
commitDesc = fmt.Sprintf("%d new commits", p.TotalCommits)
}
if len(p.CompareURL) > 0 {
commitString = SlackLinkFormatter(p.CompareURL, commitDesc)
} else {
commitString = commitDesc
}
repoLink := SlackLinkFormatter(p.Repo.HTMLURL, p.Repo.FullName)
branchLink := SlackLinkToRef(p.Repo.HTMLURL, p.Ref)
text := fmt.Sprintf("[%s:%s] %s pushed by %s", repoLink, branchLink, commitString, p.Pusher.UserName)
var attachmentText string
// for each commit, generate attachment text
for i, commit := range p.Commits {
attachmentText += fmt.Sprintf("%s: %s - %s", SlackLinkFormatter(commit.URL, commit.ID[:7]), SlackShortTextFormatter(commit.Message), SlackTextFormatter(commit.Author.Name))
// add linebreak to each commit but the last
if i < len(p.Commits)-1 {
attachmentText += "\n"
}
}
return s.createPayload(text, []SlackAttachment{{
Color: s.Color,
Title: p.Repo.HTMLURL,
TitleLink: p.Repo.HTMLURL,
Text: attachmentText,
}}), nil
}
// PullRequest implements payloadConvertor PullRequest method
func (s slackConvertor) PullRequest(p *api.PullRequestPayload) (SlackPayload, error) {
text, issueTitle, attachmentText, color := getPullRequestPayloadInfo(p, SlackLinkFormatter, true)
var attachments []SlackAttachment
if attachmentText != "" {
attachmentText = SlackTextFormatter(p.PullRequest.Body)
issueTitle = SlackTextFormatter(issueTitle)
attachments = append(attachments, SlackAttachment{
Color: fmt.Sprintf("%x", color),
Title: issueTitle,
TitleLink: p.PullRequest.HTMLURL,
Text: attachmentText,
})
}
return s.createPayload(text, attachments), nil
}
// Review implements payloadConvertor Review method
func (s slackConvertor) Review(p *api.PullRequestPayload, event webhook_module.HookEventType) (SlackPayload, error) {
senderLink := SlackLinkFormatter(setting.AppURL+p.Sender.UserName, p.Sender.UserName)
title := fmt.Sprintf("#%d %s", p.Index, p.PullRequest.Title)
titleLink := fmt.Sprintf("%s/pulls/%d", p.Repository.HTMLURL, p.Index)
repoLink := SlackLinkFormatter(p.Repository.HTMLURL, p.Repository.FullName)
var text string
switch p.Action {
case api.HookIssueReviewed:
action, err := parseHookPullRequestEventType(event)
if err != nil {
return SlackPayload{}, err
}
text = fmt.Sprintf("[%s] Pull request review %s: [%s](%s) by %s", repoLink, action, title, titleLink, senderLink)
}
return s.createPayload(text, nil), nil
}
// Repository implements payloadConvertor Repository method
func (s slackConvertor) Repository(p *api.RepositoryPayload) (SlackPayload, error) {
senderLink := SlackLinkFormatter(setting.AppURL+p.Sender.UserName, p.Sender.UserName)
repoLink := SlackLinkFormatter(p.Repository.HTMLURL, p.Repository.FullName)
var text string
switch p.Action {
case api.HookRepoCreated:
text = fmt.Sprintf("[%s] Repository created by %s", repoLink, senderLink)
case api.HookRepoDeleted:
text = fmt.Sprintf("[%s] Repository deleted by %s", repoLink, senderLink)
}
return s.createPayload(text, nil), nil
}
func (s slackConvertor) createPayload(text string, attachments []SlackAttachment) SlackPayload {
return SlackPayload{
Channel: s.Channel,
Text: text,
Username: s.Username,
IconURL: s.IconURL,
Attachments: attachments,
}
}
type slackConvertor struct {
Channel string
Username string
IconURL string
Color string
}
var _ shared.PayloadConvertor[SlackPayload] = slackConvertor{}
func (slackHandler) NewRequest(ctx context.Context, w *webhook_model.Webhook, t *webhook_model.HookTask) (*http.Request, []byte, error) {
meta := &SlackMeta{}
if err := json.Unmarshal([]byte(w.Meta), meta); err != nil {
return nil, nil, fmt.Errorf("slackHandler.NewRequest meta json: %w", err)
}
sc := slackConvertor{
Channel: meta.Channel,
Username: meta.Username,
IconURL: meta.IconURL,
Color: meta.Color,
}
return shared.NewJSONRequest(sc, w, t, true)
}
var slackChannel = regexp.MustCompile(`^#?[a-z0-9_-]{1,80}$`)
// IsValidSlackChannel validates a channel name conforms to what slack expects:
// https://api.slack.com/methods/conversations.rename#naming
// Conversation names can only contain lowercase letters, numbers, hyphens, and underscores, and must be 80 characters or less.
// Forgejo accepts if it starts with a #.
func IsValidSlackChannel(name string) bool {
return slackChannel.MatchString(name)
}