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forgejo/services/mailer/mail_issue.go
kolaente 085f717529
feat: notify doers of a merge when automerging (#21553)
I found myself wondering whether a PR I scheduled for automerge was
actually merged. It was, but I didn't receive a mail notification for it
- that makes sense considering I am the doer and usually don't want to
receive such notifications. But ideally I want to receive a notification
when a PR was merged because I scheduled it for automerge.

This PR implements exactly that.

The implementation works, but I wonder if there's a way to avoid passing
the "This PR was automerged" state down so much. I tried solving this
via the database (checking if there's an automerge scheduled for this PR
when sending the notification) but that did not work reliably, probably
because sending the notification happens async and the entry might have
already been deleted. My implementation might be the most
straightforward but maybe not the most elegant.

Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
2022-11-03 23:49:00 +08:00

202 lines
7 KiB
Go

// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package mailer
import (
"context"
"fmt"
activities_model "code.gitea.io/gitea/models/activities"
issues_model "code.gitea.io/gitea/models/issues"
access_model "code.gitea.io/gitea/models/perm/access"
repo_model "code.gitea.io/gitea/models/repo"
"code.gitea.io/gitea/models/unit"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/container"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
)
func fallbackMailSubject(issue *issues_model.Issue) string {
return fmt.Sprintf("[%s] %s (#%d)", issue.Repo.FullName(), issue.Title, issue.Index)
}
type mailCommentContext struct {
context.Context
Issue *issues_model.Issue
Doer *user_model.User
ActionType activities_model.ActionType
Content string
Comment *issues_model.Comment
ForceDoerNotification bool
}
const (
// MailBatchSize set the batch size used in mailIssueCommentBatch
MailBatchSize = 100
)
// mailIssueCommentToParticipants can be used for both new issue creation and comment.
// This function sends two list of emails:
// 1. Repository watchers (except for WIP pull requests) and users who are participated in comments.
// 2. Users who are not in 1. but get mentioned in current issue/comment.
func mailIssueCommentToParticipants(ctx *mailCommentContext, mentions []*user_model.User) error {
// Required by the mail composer; make sure to load these before calling the async function
if err := ctx.Issue.LoadRepo(ctx); err != nil {
return fmt.Errorf("LoadRepo(): %w", err)
}
if err := ctx.Issue.LoadPoster(); err != nil {
return fmt.Errorf("LoadPoster(): %w", err)
}
if err := ctx.Issue.LoadPullRequest(); err != nil {
return fmt.Errorf("LoadPullRequest(): %w", err)
}
// Enough room to avoid reallocations
unfiltered := make([]int64, 1, 64)
// =========== Original poster ===========
unfiltered[0] = ctx.Issue.PosterID
// =========== Assignees ===========
ids, err := issues_model.GetAssigneeIDsByIssue(ctx.Issue.ID)
if err != nil {
return fmt.Errorf("GetAssigneeIDsByIssue(%d): %w", ctx.Issue.ID, err)
}
unfiltered = append(unfiltered, ids...)
// =========== Participants (i.e. commenters, reviewers) ===========
ids, err = issues_model.GetParticipantsIDsByIssueID(ctx.Issue.ID)
if err != nil {
return fmt.Errorf("GetParticipantsIDsByIssueID(%d): %w", ctx.Issue.ID, err)
}
unfiltered = append(unfiltered, ids...)
// =========== Issue watchers ===========
ids, err = issues_model.GetIssueWatchersIDs(ctx, ctx.Issue.ID, true)
if err != nil {
return fmt.Errorf("GetIssueWatchersIDs(%d): %w", ctx.Issue.ID, err)
}
unfiltered = append(unfiltered, ids...)
// =========== Repo watchers ===========
// Make repo watchers last, since it's likely the list with the most users
if !(ctx.Issue.IsPull && ctx.Issue.PullRequest.IsWorkInProgress() && ctx.ActionType != activities_model.ActionCreatePullRequest) {
ids, err = repo_model.GetRepoWatchersIDs(ctx, ctx.Issue.RepoID)
if err != nil {
return fmt.Errorf("GetRepoWatchersIDs(%d): %w", ctx.Issue.RepoID, err)
}
unfiltered = append(ids, unfiltered...)
}
visited := make(container.Set[int64], len(unfiltered)+len(mentions)+1)
// Avoid mailing the doer
if ctx.Doer.EmailNotificationsPreference != user_model.EmailNotificationsAndYourOwn && !ctx.ForceDoerNotification {
visited.Add(ctx.Doer.ID)
}
// =========== Mentions ===========
if err = mailIssueCommentBatch(ctx, mentions, visited, true); err != nil {
return fmt.Errorf("mailIssueCommentBatch() mentions: %w", err)
}
// Avoid mailing explicit unwatched
ids, err = issues_model.GetIssueWatchersIDs(ctx, ctx.Issue.ID, false)
if err != nil {
return fmt.Errorf("GetIssueWatchersIDs(%d): %w", ctx.Issue.ID, err)
}
visited.AddMultiple(ids...)
unfilteredUsers, err := user_model.GetMaileableUsersByIDs(unfiltered, false)
if err != nil {
return err
}
if err = mailIssueCommentBatch(ctx, unfilteredUsers, visited, false); err != nil {
return fmt.Errorf("mailIssueCommentBatch(): %w", err)
}
return nil
}
func mailIssueCommentBatch(ctx *mailCommentContext, users []*user_model.User, visited container.Set[int64], fromMention bool) error {
checkUnit := unit.TypeIssues
if ctx.Issue.IsPull {
checkUnit = unit.TypePullRequests
}
langMap := make(map[string][]*user_model.User)
for _, user := range users {
if !user.IsActive {
// Exclude deactivated users
continue
}
// At this point we exclude:
// user that don't have all mails enabled or users only get mail on mention and this is one ...
if !(user.EmailNotificationsPreference == user_model.EmailNotificationsEnabled ||
user.EmailNotificationsPreference == user_model.EmailNotificationsAndYourOwn ||
fromMention && user.EmailNotificationsPreference == user_model.EmailNotificationsOnMention) {
continue
}
// if we have already visited this user we exclude them
if !visited.Add(user.ID) {
continue
}
// test if this user is allowed to see the issue/pull
if !access_model.CheckRepoUnitUser(ctx, ctx.Issue.Repo, user, checkUnit) {
continue
}
langMap[user.Language] = append(langMap[user.Language], user)
}
for lang, receivers := range langMap {
// because we know that the len(receivers) > 0 and we don't care about the order particularly
// working backwards from the last (possibly) incomplete batch. If len(receivers) can be 0 this
// starting condition will need to be changed slightly
for i := ((len(receivers) - 1) / MailBatchSize) * MailBatchSize; i >= 0; i -= MailBatchSize {
msgs, err := composeIssueCommentMessages(ctx, lang, receivers[i:], fromMention, "issue comments")
if err != nil {
return err
}
SendAsyncs(msgs)
receivers = receivers[:i]
}
}
return nil
}
// MailParticipants sends new issue thread created emails to repository watchers
// and mentioned people.
func MailParticipants(issue *issues_model.Issue, doer *user_model.User, opType activities_model.ActionType, mentions []*user_model.User) error {
if setting.MailService == nil {
// No mail service configured
return nil
}
content := issue.Content
if opType == activities_model.ActionCloseIssue || opType == activities_model.ActionClosePullRequest ||
opType == activities_model.ActionReopenIssue || opType == activities_model.ActionReopenPullRequest ||
opType == activities_model.ActionMergePullRequest || opType == activities_model.ActionAutoMergePullRequest {
content = ""
}
forceDoerNotification := opType == activities_model.ActionAutoMergePullRequest
if err := mailIssueCommentToParticipants(
&mailCommentContext{
Context: context.TODO(), // TODO: use a correct context
Issue: issue,
Doer: doer,
ActionType: opType,
Content: content,
Comment: nil,
ForceDoerNotification: forceDoerNotification,
}, mentions); err != nil {
log.Error("mailIssueCommentToParticipants: %v", err)
}
return nil
}