package feed

//go:generate stringer -linecomment -type=V3AttackComplexity

import (
  "encoding/json"
  "fmt"
)

// CVSS v3 attack complexity
type V3AttackComplexity byte

const (
  V3ACLow V3AttackComplexity = iota // LOW
  V3ACMedium // MEDIUM
  V3ACHigh // HIGH
)

// Unmarshal CVSS v3 attack complexity from JSON.
func (me *V3AttackComplexity) 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 "LOW":
    *me = V3ACLow
  case "MEDIUM":
    *me = V3ACMedium
  case "HIGH":
    *me = V3ACHigh
  default:
    // return error
    return fmt.Errorf("unknown CVSS v3 attack complexity: %s", s)
  }

  // return success
  return nil
}