severity.go

package log

import (
	"fmt"
	"strings"
)

type Severity int32

// Supported severities.
const (
	SeverityDebug Severity = iota
	SeverityInfo
	SeverityWarning
	SeverityError
)

var severityNames = []string{"DEBUG", "INFO", "WARN", "ERROR"}

func (s Severity) String() string {
	if int(s) < 0 || int(s) >= len(severityNames) {
		return "UNKNOWN"
	}
	return severityNames[s]
}

func SeverityFromString(s string) (Severity, error) {
	// Treat empty severity string as INFO to preserve backwards compatibility
	// with older configs that did not have that parameter.
	if s == "" {
		return SeverityInfo, nil
	}
	s = strings.ToUpper(s)
	for idx, name := range severityNames {
		if name == s {
			return Severity(idx), nil
		}
	}
	return -1, fmt.Errorf("unsupported severity: %s", s)
}