mirror of
1
Fork 0
forgejo/services/webhook/matrix.go

259 lines
8.4 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package webhook
import (
"crypto/sha1"
"encoding/hex"
"errors"
"fmt"
"html"
"net/url"
"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"
"code.gitea.io/gitea/modules/util"
webhook_module "code.gitea.io/gitea/modules/webhook"
)
const matrixPayloadSizeLimit = 1024 * 64
// MatrixMeta contains the Matrix metadata
type MatrixMeta struct {
HomeserverURL string `json:"homeserver_url"`
Room string `json:"room_id"`
MessageType int `json:"message_type"`
}
var messageTypeText = map[int]string{
1: "m.notice",
2: "m.text",
}
// GetMatrixHook returns Matrix metadata
func GetMatrixHook(w *webhook_model.Webhook) *MatrixMeta {
s := &MatrixMeta{}
if err := json.Unmarshal([]byte(w.Meta), s); err != nil {
log.Error("webhook.GetMatrixHook(%d): %v", w.ID, err)
}
return s
}
var _ PayloadConvertor = &MatrixPayload{}
// MatrixPayload contains payload for a Matrix room
type MatrixPayload struct {
Body string `json:"body"`
MsgType string `json:"msgtype"`
Format string `json:"format"`
FormattedBody string `json:"formatted_body"`
Commits []*api.PayloadCommit `json:"io.gitea.commits,omitempty"`
}
// JSONPayload Marshals the MatrixPayload to json
func (m *MatrixPayload) JSONPayload() ([]byte, error) {
data, err := json.MarshalIndent(m, "", " ")
if err != nil {
return []byte{}, err
}
return data, nil
}
// MatrixLinkFormatter creates a link compatible with Matrix
func MatrixLinkFormatter(url, text string) string {
return fmt.Sprintf(`<a href="%s">%s</a>`, html.EscapeString(url), html.EscapeString(text))
}
// MatrixLinkToRef Matrix-formatter link to a repo ref
func MatrixLinkToRef(repoURL, ref string) string {
refName := git.RefEndName(ref)
switch {
case strings.HasPrefix(ref, git.BranchPrefix):
return MatrixLinkFormatter(repoURL+"/src/branch/"+util.PathEscapeSegments(refName), refName)
case strings.HasPrefix(ref, git.TagPrefix):
return MatrixLinkFormatter(repoURL+"/src/tag/"+util.PathEscapeSegments(refName), refName)
default:
return MatrixLinkFormatter(repoURL+"/src/commit/"+util.PathEscapeSegments(refName), refName)
}
}
// Create implements PayloadConvertor Create method
func (m *MatrixPayload) Create(p *api.CreatePayload) (api.Payloader, error) {
repoLink := MatrixLinkFormatter(p.Repo.HTMLURL, p.Repo.FullName)
refLink := MatrixLinkToRef(p.Repo.HTMLURL, p.Ref)
text := fmt.Sprintf("[%s:%s] %s created by %s", repoLink, refLink, p.RefType, p.Sender.UserName)
return getMatrixPayload(text, nil, m.MsgType), nil
}
// Delete composes Matrix payload for delete a branch or tag.
func (m *MatrixPayload) Delete(p *api.DeletePayload) (api.Payloader, error) {
refName := git.RefEndName(p.Ref)
repoLink := MatrixLinkFormatter(p.Repo.HTMLURL, p.Repo.FullName)
text := fmt.Sprintf("[%s:%s] %s deleted by %s", repoLink, refName, p.RefType, p.Sender.UserName)
return getMatrixPayload(text, nil, m.MsgType), nil
}
// Fork composes Matrix payload for forked by a repository.
func (m *MatrixPayload) Fork(p *api.ForkPayload) (api.Payloader, error) {
baseLink := MatrixLinkFormatter(p.Forkee.HTMLURL, p.Forkee.FullName)
forkLink := MatrixLinkFormatter(p.Repo.HTMLURL, p.Repo.FullName)
text := fmt.Sprintf("%s is forked to %s", baseLink, forkLink)
return getMatrixPayload(text, nil, m.MsgType), nil
}
// Issue implements PayloadConvertor Issue method
func (m *MatrixPayload) Issue(p *api.IssuePayload) (api.Payloader, error) {
text, _, _, _ := getIssuesPayloadInfo(p, MatrixLinkFormatter, true)
return getMatrixPayload(text, nil, m.MsgType), nil
}
// IssueComment implements PayloadConvertor IssueComment method
func (m *MatrixPayload) IssueComment(p *api.IssueCommentPayload) (api.Payloader, error) {
text, _, _ := getIssueCommentPayloadInfo(p, MatrixLinkFormatter, true)
return getMatrixPayload(text, nil, m.MsgType), nil
}
// Wiki implements PayloadConvertor Wiki method
func (m *MatrixPayload) Wiki(p *api.WikiPayload) (api.Payloader, error) {
text, _, _ := getWikiPayloadInfo(p, MatrixLinkFormatter, true)
return getMatrixPayload(text, nil, m.MsgType), nil
}
// Release implements PayloadConvertor Release method
func (m *MatrixPayload) Release(p *api.ReleasePayload) (api.Payloader, error) {
text, _ := getReleasePayloadInfo(p, MatrixLinkFormatter, true)
return getMatrixPayload(text, nil, m.MsgType), nil
}
// Push implements PayloadConvertor Push method
func (m *MatrixPayload) Push(p *api.PushPayload) (api.Payloader, error) {
var commitDesc string
if p.TotalCommits == 1 {
commitDesc = "1 commit"
} else {
commitDesc = fmt.Sprintf("%d commits", p.TotalCommits)
}
repoLink := MatrixLinkFormatter(p.Repo.HTMLURL, p.Repo.FullName)
branchLink := MatrixLinkToRef(p.Repo.HTMLURL, p.Ref)
text := fmt.Sprintf("[%s] %s pushed %s to %s:<br>", repoLink, p.Pusher.UserName, commitDesc, branchLink)
// for each commit, generate a new line text
for i, commit := range p.Commits {
text += fmt.Sprintf("%s: %s - %s", MatrixLinkFormatter(commit.URL, commit.ID[:7]), commit.Message, commit.Author.Name)
// add linebreak to each commit but the last
if i < len(p.Commits)-1 {
text += "<br>"
}
}
return getMatrixPayload(text, p.Commits, m.MsgType), nil
}
// PullRequest implements PayloadConvertor PullRequest method
func (m *MatrixPayload) PullRequest(p *api.PullRequestPayload) (api.Payloader, error) {
text, _, _, _ := getPullRequestPayloadInfo(p, MatrixLinkFormatter, true)
return getMatrixPayload(text, nil, m.MsgType), nil
}
// Review implements PayloadConvertor Review method
func (m *MatrixPayload) Review(p *api.PullRequestPayload, event webhook_module.HookEventType) (api.Payloader, error) {
senderLink := MatrixLinkFormatter(setting.AppURL+url.PathEscape(p.Sender.UserName), p.Sender.UserName)
title := fmt.Sprintf("#%d %s", p.Index, p.PullRequest.Title)
titleLink := MatrixLinkFormatter(p.PullRequest.URL, title)
repoLink := MatrixLinkFormatter(p.Repository.HTMLURL, p.Repository.FullName)
var text string
switch p.Action {
case api.HookIssueReviewed:
action, err := parseHookPullRequestEventType(event)
if err != nil {
return nil, err
}
text = fmt.Sprintf("[%s] Pull request review %s: %s by %s", repoLink, action, titleLink, senderLink)
}
return getMatrixPayload(text, nil, m.MsgType), nil
}
// Repository implements PayloadConvertor Repository method
func (m *MatrixPayload) Repository(p *api.RepositoryPayload) (api.Payloader, error) {
senderLink := MatrixLinkFormatter(setting.AppURL+p.Sender.UserName, p.Sender.UserName)
repoLink := MatrixLinkFormatter(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 getMatrixPayload(text, nil, m.MsgType), nil
}
// GetMatrixPayload converts a Matrix webhook into a MatrixPayload
func GetMatrixPayload(p api.Payloader, event webhook_module.HookEventType, meta string) (api.Payloader, error) {
s := new(MatrixPayload)
matrix := &MatrixMeta{}
if err := json.Unmarshal([]byte(meta), &matrix); err != nil {
return s, errors.New("GetMatrixPayload meta json:" + err.Error())
}
s.MsgType = messageTypeText[matrix.MessageType]
return convertPayloader(s, p, event)
}
func getMatrixPayload(text string, commits []*api.PayloadCommit, msgType string) *MatrixPayload {
p := MatrixPayload{}
p.FormattedBody = text
p.Body = getMessageBody(text)
p.Format = "org.matrix.custom.html"
p.MsgType = msgType
p.Commits = commits
return &p
}
var urlRegex = regexp.MustCompile(`<a [^>]*?href="([^">]*?)">(.*?)</a>`)
func getMessageBody(htmlText string) string {
htmlText = urlRegex.ReplaceAllString(htmlText, "[$2]($1)")
htmlText = strings.ReplaceAll(htmlText, "<br>", "\n")
return htmlText
}
// getMatrixTxnID computes the transaction ID to ensure idempotency
func getMatrixTxnID(payload []byte) (string, error) {
if len(payload) >= matrixPayloadSizeLimit {
return "", fmt.Errorf("getMatrixTxnID: payload size %d > %d", len(payload), matrixPayloadSizeLimit)
}
h := sha1.New()
_, err := h.Write(payload)
if err != nil {
return "", err
}
return hex.EncodeToString(h.Sum(nil)), nil
}