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gitea/services/webhook/telegram.go
oliverpool 26653b196b
Store webhook event in database (#29145)
Refactor the webhook logic, to have the type-dependent processing happen
only in one place.

---

## Current webhook flow

1. An event happens
2. It is pre-processed (depending on the webhook type) and its body is
added to a task queue
3. When the task is processed, some more logic (depending on the webhook
type as well) is applied to make an HTTP request

This means that webhook-type dependant logic is needed in step 2 and 3.
This is cumbersome and brittle to maintain.

Updated webhook flow with this PR:
1. An event happens
2. It is stored as-is and added to a task queue
3. When the task is processed, the event is processed (depending on the
webhook type) to make an HTTP request

So the only webhook-type dependent logic happens in one place (step 3)
which should be much more robust.

## Consequences of the refactor

- the raw event must be stored in the hooktask (until now, the
pre-processed body was stored)
- to ensure that previous hooktasks are correctly sent, a
`payload_version` is added (version 1: the body has already been
pre-process / version 2: the body is the raw event)

So future webhook additions will only have to deal with creating an
http.Request based on the raw event (no need to adjust the code in
multiple places, like currently).

Moreover since this processing happens when fetching from the task
queue, it ensures that the queuing of new events (upon a `git push` for
instance) does not get slowed down by a slow webhook.

As a concrete example, the PR #19307 for custom webhooks, should be
substantially smaller:
- no need to change `services/webhook/deliver.go` 
- minimal change in `services/webhook/webhook.go` (add the new webhook
to the map)
- no need to change all the individual webhook files (since with this
refactor the `*webhook_model.Webhook` is provided as argument)
2024-03-07 23:18:38 +01:00

194 lines
6.3 KiB
Go

// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package webhook
import (
"context"
"fmt"
"net/http"
"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"
api "code.gitea.io/gitea/modules/structs"
webhook_module "code.gitea.io/gitea/modules/webhook"
)
type (
// TelegramPayload represents
TelegramPayload struct {
Message string `json:"text"`
ParseMode string `json:"parse_mode"`
DisableWebPreview bool `json:"disable_web_page_preview"`
}
// TelegramMeta contains the telegram metadata
TelegramMeta struct {
BotToken string `json:"bot_token"`
ChatID string `json:"chat_id"`
ThreadID string `json:"thread_id"`
}
)
// GetTelegramHook returns telegram metadata
func GetTelegramHook(w *webhook_model.Webhook) *TelegramMeta {
s := &TelegramMeta{}
if err := json.Unmarshal([]byte(w.Meta), s); err != nil {
log.Error("webhook.GetTelegramHook(%d): %v", w.ID, err)
}
return s
}
// Create implements PayloadConvertor Create method
func (t telegramConvertor) Create(p *api.CreatePayload) (TelegramPayload, error) {
// created tag/branch
refName := git.RefName(p.Ref).ShortName()
title := fmt.Sprintf(`[<a href="%s">%s</a>] %s <a href="%s">%s</a> created`, p.Repo.HTMLURL, p.Repo.FullName, p.RefType,
p.Repo.HTMLURL+"/src/"+refName, refName)
return createTelegramPayload(title), nil
}
// Delete implements PayloadConvertor Delete method
func (t telegramConvertor) Delete(p *api.DeletePayload) (TelegramPayload, error) {
// created tag/branch
refName := git.RefName(p.Ref).ShortName()
title := fmt.Sprintf(`[<a href="%s">%s</a>] %s <a href="%s">%s</a> deleted`, p.Repo.HTMLURL, p.Repo.FullName, p.RefType,
p.Repo.HTMLURL+"/src/"+refName, refName)
return createTelegramPayload(title), nil
}
// Fork implements PayloadConvertor Fork method
func (t telegramConvertor) Fork(p *api.ForkPayload) (TelegramPayload, error) {
title := fmt.Sprintf(`%s is forked to <a href="%s">%s</a>`, p.Forkee.FullName, p.Repo.HTMLURL, p.Repo.FullName)
return createTelegramPayload(title), nil
}
// Push implements PayloadConvertor Push method
func (t telegramConvertor) Push(p *api.PushPayload) (TelegramPayload, error) {
var (
branchName = git.RefName(p.Ref).ShortName()
commitDesc string
)
var titleLink string
if p.TotalCommits == 1 {
commitDesc = "1 new commit"
titleLink = p.Commits[0].URL
} else {
commitDesc = fmt.Sprintf("%d new commits", p.TotalCommits)
titleLink = p.CompareURL
}
if titleLink == "" {
titleLink = p.Repo.HTMLURL + "/src/" + branchName
}
title := fmt.Sprintf(`[<a href="%s">%s</a>:<a href="%s">%s</a>] %s`, p.Repo.HTMLURL, p.Repo.FullName, titleLink, branchName, commitDesc)
var text string
// for each commit, generate attachment text
for i, commit := range p.Commits {
var authorName string
if commit.Author != nil {
authorName = " - " + commit.Author.Name
}
text += fmt.Sprintf(`[<a href="%s">%s</a>] %s`, commit.URL, commit.ID[:7],
strings.TrimRight(commit.Message, "\r\n")) + authorName
// add linebreak to each commit but the last
if i < len(p.Commits)-1 {
text += "\n"
}
}
return createTelegramPayload(title + "\n" + text), nil
}
// Issue implements PayloadConvertor Issue method
func (t telegramConvertor) Issue(p *api.IssuePayload) (TelegramPayload, error) {
text, _, attachmentText, _ := getIssuesPayloadInfo(p, htmlLinkFormatter, true)
return createTelegramPayload(text + "\n\n" + attachmentText), nil
}
// IssueComment implements PayloadConvertor IssueComment method
func (t telegramConvertor) IssueComment(p *api.IssueCommentPayload) (TelegramPayload, error) {
text, _, _ := getIssueCommentPayloadInfo(p, htmlLinkFormatter, true)
return createTelegramPayload(text + "\n" + p.Comment.Body), nil
}
// PullRequest implements PayloadConvertor PullRequest method
func (t telegramConvertor) PullRequest(p *api.PullRequestPayload) (TelegramPayload, error) {
text, _, attachmentText, _ := getPullRequestPayloadInfo(p, htmlLinkFormatter, true)
return createTelegramPayload(text + "\n" + attachmentText), nil
}
// Review implements PayloadConvertor Review method
func (t telegramConvertor) Review(p *api.PullRequestPayload, event webhook_module.HookEventType) (TelegramPayload, error) {
var text, attachmentText string
switch p.Action {
case api.HookIssueReviewed:
action, err := parseHookPullRequestEventType(event)
if err != nil {
return TelegramPayload{}, err
}
text = fmt.Sprintf("[%s] Pull request review %s: #%d %s", p.Repository.FullName, action, p.Index, p.PullRequest.Title)
attachmentText = p.Review.Content
}
return createTelegramPayload(text + "\n" + attachmentText), nil
}
// Repository implements PayloadConvertor Repository method
func (t telegramConvertor) Repository(p *api.RepositoryPayload) (TelegramPayload, error) {
var title string
switch p.Action {
case api.HookRepoCreated:
title = fmt.Sprintf(`[<a href="%s">%s</a>] Repository created`, p.Repository.HTMLURL, p.Repository.FullName)
return createTelegramPayload(title), nil
case api.HookRepoDeleted:
title = fmt.Sprintf("[%s] Repository deleted", p.Repository.FullName)
return createTelegramPayload(title), nil
}
return TelegramPayload{}, nil
}
// Wiki implements PayloadConvertor Wiki method
func (t telegramConvertor) Wiki(p *api.WikiPayload) (TelegramPayload, error) {
text, _, _ := getWikiPayloadInfo(p, htmlLinkFormatter, true)
return createTelegramPayload(text), nil
}
// Release implements PayloadConvertor Release method
func (t telegramConvertor) Release(p *api.ReleasePayload) (TelegramPayload, error) {
text, _ := getReleasePayloadInfo(p, htmlLinkFormatter, true)
return createTelegramPayload(text), nil
}
func (t telegramConvertor) Package(p *api.PackagePayload) (TelegramPayload, error) {
text, _ := getPackagePayloadInfo(p, htmlLinkFormatter, true)
return createTelegramPayload(text), nil
}
func createTelegramPayload(message string) TelegramPayload {
return TelegramPayload{
Message: strings.TrimSpace(message),
}
}
type telegramConvertor struct{}
var _ payloadConvertor[TelegramPayload] = telegramConvertor{}
func newTelegramRequest(ctx context.Context, w *webhook_model.Webhook, t *webhook_model.HookTask) (*http.Request, []byte, error) {
return newJSONRequest(telegramConvertor{}, w, t, true)
}