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package vote
import (
"encoding/json"
"os"
"time"
)
const Expiry = 20 * time.Second
type Vote struct {
FromID string
IDs []string
ExpiresAt time.Time `json:"-"`
}
func New(ids []string) (Vote, error) {
var v Vote
hostname, err := os.Hostname()
if err != nil {
return v, err
}
v.FromID = hostname
v.IDs = ids
return v, nil
}
func NewFromJSON(jsonStr string) (v Vote, err error) {
if err = json.Unmarshal([]byte(jsonStr), &v); err != nil {
return
}
v.ExpiresAt = time.Now().Add(Expiry)
return
}
func (v Vote) ToJSON() (string, error) {
bytes, err := json.Marshal(v)
if err != nil {
return "", err
}
return string(bytes), nil
}
func (v Vote) Expired() bool {
now := time.Now()
return now.After(v.ExpiresAt) || now.Equal(v.ExpiresAt)
}
func (v Vote) Equal(other Vote) bool {
if v.FromID != other.FromID {
return false
}
if len(v.IDs) != len(other.IDs) {
return false
}
for _, x := range v.IDs {
var found bool
for _, y := range other.IDs {
if x == y {
found = true
break
}
}
if !found {
return false
}
}
// Not comparing ExpiresAt
return true
}
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