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