package mail

import "time"

// MonitorEvent is a monitor state transition, as the control plane's
// notification dispatcher sees it. It lives here rather than in server/ so that
// the email templates and the caller agree on the fields without server's model
// package leaking into shared.
type MonitorEvent struct {
	MonitorName string
	Type        string
	OldStatus   string
	NewStatus   string
	Message     string
	Time        time.Time

	// Down drives the pill and the subject verb. The caller decides it, since
	// only server/ knows which status strings mean down.
	Down bool
}

// SendMonitorAlert delivers one state-change notification to an SMTP
// notification channel's recipients, which may be a comma-separated list.
func (s Sender) SendMonitorAlert(to string, ev MonitorEvent) error {
	return s.sendTemplate(to, "", "monitoralert", ev)
}