package feed

//go:generate stringer -linecomment -type=V2AccessVector

import (
  "encoding/json"
  "fmt"
)

type V2AccessVector byte

const (
  V2AVAdjacentNetwork V2AccessVector = iota // ADJACENT_NETWORK
  V2AVLocal // LOCAL
  V2AVNetwork // NETWORK
)

// Unmarshal CVSS V2 access vector from JSON.
func (me *V2AccessVector) 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 "ADJACENT_NETWORK":
    *me = V2AVAdjacentNetwork
  case "LOCAL":
    *me = V2AVLocal
  case "NETWORK":
    *me = V2AVNetwork
  default:
    // return error
    return fmt.Errorf("unknown CVSS v2 access vector: %s", s)
  }

  // return success
  return nil
}