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vendor/github.com/apex/log/levels.go

@@ -0,0 +1,81 @@
+package log
+
+import (
+	"bytes"
+	"errors"
+	"strings"
+)
+
+// ErrInvalidLevel is returned if the severity level is invalid.
+var ErrInvalidLevel = errors.New("invalid level")
+
+// Level of severity.
+type Level int
+
+// Log levels.
+const (
+	InvalidLevel Level = iota - 1
+	DebugLevel
+	InfoLevel
+	WarnLevel
+	ErrorLevel
+	FatalLevel
+)
+
+var levelNames = [...]string{
+	DebugLevel: "debug",
+	InfoLevel:  "info",
+	WarnLevel:  "warn",
+	ErrorLevel: "error",
+	FatalLevel: "fatal",
+}
+
+var levelStrings = map[string]Level{
+	"debug":   DebugLevel,
+	"info":    InfoLevel,
+	"warn":    WarnLevel,
+	"warning": WarnLevel,
+	"error":   ErrorLevel,
+	"fatal":   FatalLevel,
+}
+
+// String implementation.
+func (l Level) String() string {
+	return levelNames[l]
+}
+
+// MarshalJSON implementation.
+func (l Level) MarshalJSON() ([]byte, error) {
+	return []byte(`"` + l.String() + `"`), nil
+}
+
+// UnmarshalJSON implementation.
+func (l *Level) UnmarshalJSON(b []byte) error {
+	v, err := ParseLevel(string(bytes.Trim(b, `"`)))
+	if err != nil {
+		return err
+	}
+
+	*l = v
+	return nil
+}
+
+// ParseLevel parses level string.
+func ParseLevel(s string) (Level, error) {
+	l, ok := levelStrings[strings.ToLower(s)]
+	if !ok {
+		return InvalidLevel, ErrInvalidLevel
+	}
+
+	return l, nil
+}
+
+// MustParseLevel parses level string or panics.
+func MustParseLevel(s string) Level {
+	l, err := ParseLevel(s)
+	if err != nil {
+		panic("invalid log level")
+	}
+
+	return l
+}