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severity.go
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severity.go
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package event
import (
"database/sql/driver"
"encoding/json"
"fmt"
)
type Severity int
const (
SeverityNone Severity = iota
SeverityOK
SeverityDebug
SeverityInfo
SeverityNotice
SeverityWarning
SeverityErr
SeverityCrit
SeverityAlert
SeverityEmerg
)
var severityByName = map[string]Severity{
"ok": SeverityOK,
"debug": SeverityDebug,
"info": SeverityInfo,
"notice": SeverityNotice,
"warning": SeverityWarning,
"err": SeverityErr,
"crit": SeverityCrit,
"alert": SeverityAlert,
"emerg": SeverityEmerg,
}
var severityToName = func() map[Severity]string {
m := make(map[Severity]string)
for name, severity := range severityByName {
m[severity] = name
}
return m
}()
func GetSeverityByName(sev string) (Severity, error) {
severity, ok := severityByName[sev]
if !ok {
return SeverityNone, fmt.Errorf("unknown severity %q", sev)
}
return severity, nil
}
func (s *Severity) MarshalJSON() ([]byte, error) {
if name, ok := severityToName[*s]; ok {
return json.Marshal(name)
} else {
return json.Marshal(nil)
}
}
func (s *Severity) UnmarshalJSON(data []byte) error {
if string(data) == "null" {
*s = SeverityNone
return nil
}
var name string
err := json.Unmarshal(data, &name)
if err != nil {
return err
}
severity, ok := severityByName[name]
if !ok {
return fmt.Errorf("unknown severity %q", name)
}
*s = severity
return nil
}
// Scan implements the sql.Scanner interface.
// Supports SQL NULL.
func (s *Severity) Scan(src any) error {
if src == nil {
*s = SeverityNone
return nil
}
var name string
switch val := src.(type) {
case string:
name = val
case []byte:
name = string(val)
default:
return fmt.Errorf("unable to scan type %T into Severity", src)
}
severity, ok := severityByName[name]
if !ok {
return fmt.Errorf("unknown severity %q", string(name))
}
*s = severity
return nil
}
// Value implements the driver.Valuer interface.
// Supports SQL NULL.
func (s Severity) Value() (driver.Value, error) {
if s == SeverityNone {
return nil, nil
}
return s.String(), nil
}
func (s *Severity) String() string {
return severityToName[*s]
}