// CloseAlertAction closes an alert at OpsGenie.
func CloseAlertAction(c *gcli.Context) {
	cli, err := NewAlertClient(c)
	if err != nil {
		os.Exit(1)
	}

	req := alerts.CloseAlertRequest{}
	if val, success := getVal("id", c); success {
		req.ID = val
	}
	if val, success := getVal("alias", c); success {
		req.Alias = val
	}
	req.User = grabUsername(c)
	if val, success := getVal("source", c); success {
		req.Source = val
	}
	if val, success := getVal("note", c); success {
		req.Note = val
	}
	if val, success := getVal("notify", c); success {
		req.Notify = strings.Split(val, ",")
	}

	printVerboseMessage("Close alert request prepared from flags, sending request to OpsGenie..")

	_, err = cli.Close(req)
	if err != nil {
		fmt.Printf("%s\n", err.Error())
		os.Exit(1)
	}
	printVerboseMessage("Alert closed successfully.")
}