package feed

//go:generate stringer -linecomment -type=V3PrivilegesRequired

import (
  "encoding/json"
  "fmt"
)

// CVSS v3 privileges required.
type V3PrivilegesRequired byte

const (
  V3PRNone V3PrivilegesRequired = iota // NONE
  V3PRLow // LOW
  V3PRMedium // MEDIUM
  V3PRHigh // HIGH
)

// Unmarshal CVSS privileges required from JSON.
func (me *V3PrivilegesRequired) UnmarshalJSON(b []byte) error {
  // decode string, check for error
  var s string
  if err := json.Unmarshal(b, &s); err != nil {
    return err
  }

  // check value
  switch s {
  case "NONE":
    *me = V3PRNone
  case "LOW":
    *me = V3PRLow
  case "MEDIUM":
    *me = V3PRMedium
  case "HIGH":
    *me = V3PRHigh
  default:
    // return error
    return fmt.Errorf("unknown CVSS v3 privileges required: %s", s)
  }

  // return success
  return nil
}