[MM-39060] - A/B Test: Reminder to Join Workspace email (#18894)

* [MM-39060] - A/B Test: Reminder to Join Workspace email

* Fix error and add error handling

* feedback impl

* run make i18n-extract

* improvements

* make i18n-extract

* setup ability to do telemetry on reminder invite emails

* improvement

* add telemetry

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/email/email.go

@@ -426,7 +426,7 @@ func (es *Service) SendMfaChangeEmail(email string, activated bool, locale, site
 	return nil
 }
 
-func (es *Service) SendInviteEmails(team *model.Team, senderName string, senderUserId string, invites []string, siteURL string) error {
+func (es *Service) SendInviteEmails(team *model.Team, senderName string, senderUserId string, invites []string, siteURL string, reminderData *model.TeamInviteReminderData) error {
 	if es.PerHourEmailRateLimiter == nil {
 		return NoRateLimiterError
 	}
@@ -450,7 +450,6 @@ func (es *Service) SendInviteEmails(team *model.Team, senderName string, senderU
 
 			data := es.NewEmailTemplateData("")
 			data.Props["SiteURL"] = siteURL
-			data.Props["Title"] = i18n.T("api.templates.invite_body.title", map[string]interface{}{"SenderName": senderName, "TeamDisplayName": team.DisplayName})
 			data.Props["SubTitle"] = i18n.T("api.templates.invite_body.subTitle")
 			data.Props["Button"] = i18n.T("api.templates.invite_body.button")
 			data.Props["SenderName"] = senderName
@@ -467,6 +466,16 @@ func (es *Service) SendInviteEmails(team *model.Team, senderName string, senderU
 			tokenProps["email"] = invite
 			tokenProps["display_name"] = team.DisplayName
 			tokenProps["name"] = team.Name
+
+			title := i18n.T("api.templates.invite_body.title", map[string]interface{}{"SenderName": senderName, "TeamDisplayName": team.DisplayName})
+			if reminderData != nil {
+				reminder := i18n.T("api.templates.invite_body.title.reminder")
+				title = fmt.Sprintf("%s: %s", reminder, title)
+				tokenProps["reminder_interval"] = reminderData.Interval
+			}
+
+			data.Props["Title"] = title
+
 			tokenData := model.MapToJSON(tokenProps)
 
 			if err := es.store.Token().Save(token); err != nil {

app/email/email_test.go

@@ -70,7 +70,7 @@ func TestSendInviteEmails(t *testing.T) {
 	t.Run("SendInviteEmails", func(t *testing.T) {
 		mail.DeleteMailBox(emailTo)
 
-		err := th.service.SendInviteEmails(th.BasicTeam, "test-user", th.BasicUser.Id, []string{emailTo}, "http://testserver")
+		err := th.service.SendInviteEmails(th.BasicTeam, "test-user", th.BasicUser.Id, []string{emailTo}, "http://testserver", nil)
 		require.NoError(t, err)
 
 		verifyMailbox(t)