Send registration email on user autoregistration (#16523)

When users login and are autoregistered send email notification.

Fix #16178

* Protect public functions within the mailer by testing if the mailer is configured

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: 6543 <6543@obermui.de>

services/mailer/mail.go

@@ -57,6 +57,10 @@ func InitMailRender(subjectTpl *texttmpl.Template, bodyTpl *template.Template) {
 
 // SendTestMail sends a test mail
 func SendTestMail(email string) error {
+	if setting.MailService == nil {
+		// No mail service configured
+		return nil
+	}
 	return gomail.Send(Sender, NewMessage([]string{email}, "Gitea Test Email!", "Gitea Test Email!").ToMessage())
 }
 
@@ -90,17 +94,29 @@ func sendUserMail(language string, u *models.User, tpl base.TplName, code, subje
 
 // SendActivateAccountMail sends an activation mail to the user (new user registration)
 func SendActivateAccountMail(locale translation.Locale, u *models.User) {
+	if setting.MailService == nil {
+		// No mail service configured
+		return
+	}
 	sendUserMail(locale.Language(), u, mailAuthActivate, u.GenerateEmailActivateCode(u.Email), locale.Tr("mail.activate_account"), "activate account")
 }
 
 // SendResetPasswordMail sends a password reset mail to the user
 func SendResetPasswordMail(u *models.User) {
+	if setting.MailService == nil {
+		// No mail service configured
+		return
+	}
 	locale := translation.NewLocale(u.Language)
 	sendUserMail(u.Language, u, mailAuthResetPassword, u.GenerateEmailActivateCode(u.Email), locale.Tr("mail.reset_password"), "recover account")
 }
 
 // SendActivateEmailMail sends confirmation email to confirm new email address
 func SendActivateEmailMail(u *models.User, email *models.EmailAddress) {
+	if setting.MailService == nil {
+		// No mail service configured
+		return
+	}
 	locale := translation.NewLocale(u.Language)
 	data := map[string]interface{}{
 		"DisplayName":     u.DisplayName(),
@@ -129,6 +145,10 @@ func SendActivateEmailMail(u *models.User, email *models.EmailAddress) {
 
 // SendRegisterNotifyMail triggers a notify e-mail by admin created a account.
 func SendRegisterNotifyMail(u *models.User) {
+	if setting.MailService == nil {
+		// No mail service configured
+		return
+	}
 	locale := translation.NewLocale(u.Language)
 
 	data := map[string]interface{}{
@@ -156,6 +176,10 @@ func SendRegisterNotifyMail(u *models.User) {
 
 // SendCollaboratorMail sends mail notification to new collaborator.
 func SendCollaboratorMail(u, doer *models.User, repo *models.Repository) {
+	if setting.MailService == nil {
+		// No mail service configured
+		return
+	}
 	locale := translation.NewLocale(u.Language)
 	repoName := repo.FullName()
 
@@ -344,6 +368,10 @@ func sanitizeSubject(subject string) string {
 
 // SendIssueAssignedMail composes and sends issue assigned email
 func SendIssueAssignedMail(issue *models.Issue, doer *models.User, content string, comment *models.Comment, recipients []*models.User) error {
+	if setting.MailService == nil {
+		// No mail service configured
+		return nil
+	}
 	langMap := make(map[string][]*models.User)
 	for _, user := range recipients {
 		langMap[user.Language] = append(langMap[user.Language], user)

services/mailer/mail_comment.go

@@ -7,10 +7,16 @@ package mailer
 import (
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
 )
 
 // MailParticipantsComment sends new comment emails to repository watchers and mentioned people.
 func MailParticipantsComment(c *models.Comment, opType models.ActionType, issue *models.Issue, mentions []*models.User) error {
+	if setting.MailService == nil {
+		// No mail service configured
+		return nil
+	}
+
 	content := c.Content
 	if c.Type == models.CommentTypePullPush {
 		content = ""
@@ -30,6 +36,11 @@ func MailParticipantsComment(c *models.Comment, opType models.ActionType, issue
 
 // MailMentionsComment sends email to users mentioned in a code comment
 func MailMentionsComment(pr *models.PullRequest, c *models.Comment, mentions []*models.User) (err error) {
+	if setting.MailService == nil {
+		// No mail service configured
+		return nil
+	}
+
 	visited := make(map[int64]bool, len(mentions)+1)
 	visited[c.Poster.ID] = true
 	if err = mailIssueCommentBatch(

services/mailer/mail_issue.go

@@ -9,6 +9,7 @@ import (
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
 )
 
 func fallbackMailSubject(issue *models.Issue) string {
@@ -163,6 +164,11 @@ func mailIssueCommentBatch(ctx *mailCommentContext, users []*models.User, visite
 // MailParticipants sends new issue thread created emails to repository watchers
 // and mentioned people.
 func MailParticipants(issue *models.Issue, doer *models.User, opType models.ActionType, mentions []*models.User) error {
+	if setting.MailService == nil {
+		// No mail service configured
+		return nil
+	}
+
 	content := issue.Content
 	if opType == models.ActionCloseIssue || opType == models.ActionClosePullRequest ||
 		opType == models.ActionReopenIssue || opType == models.ActionReopenPullRequest ||

services/mailer/mail_release.go

@@ -23,6 +23,11 @@ const (
 
 // MailNewRelease send new release notify to all all repo watchers.
 func MailNewRelease(rel *models.Release) {
+	if setting.MailService == nil {
+		// No mail service configured
+		return
+	}
+
 	watcherIDList, err := models.GetRepoWatchersIDs(rel.RepoID)
 	if err != nil {
 		log.Error("GetRepoWatchersIDs(%d): %v", rel.RepoID, err)

services/mailer/mail_repo.go

@@ -9,12 +9,18 @@ import (
 	"fmt"
 
 	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/templates"
 	"code.gitea.io/gitea/modules/translation"
 )
 
 // SendRepoTransferNotifyMail triggers a notification e-mail when a pending repository transfer was created
 func SendRepoTransferNotifyMail(doer, newOwner *models.User, repo *models.Repository) error {
+	if setting.MailService == nil {
+		// No mail service configured
+		return nil
+	}
+
 	if newOwner.IsOrganization() {
 		users, err := models.GetUsersWhoCanCreateOrgRepo(newOwner.ID)
 		if err != nil {