/
node.go
84 lines (67 loc) · 1.48 KB
/
node.go
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package main
import "bufio"
import "io"
import "math/rand"
import "os"
import "compress/gzip"
import "strings"
import "time"
import "github.com/pborman/uuid"
type Node struct {
Id string
Name string
Addr string
}
func NewRandomNode() (Node, error) {
id := generateNewId()
name, err := generateNewName()
if err != nil {
return Node{}, err
}
return Node{id, name, ""}, nil
}
func NewNode(id string, name string, addr string) Node {
return Node{id, name, addr}
}
func generateNewId() string {
newId := uuid.NewRandom().URN()
return newId[strings.LastIndex(newId, ":")+1:]
}
func generateNewName() (string, error) {
s1 := rand.NewSource(time.Now().UnixNano())
r1 := rand.New(s1)
nameIdx := r1.Intn(258000)
surnameIdx := r1.Intn(88799)
nameFile, err := os.Open("names.dat.gz")
if err != nil {
return "", err
}
nameReader, err := gzip.NewReader(nameFile)
if err != nil {
return "", err
}
defer nameReader.Close()
name, err := readLine(nameReader, nameIdx)
surnameFile, err := os.Open("names.dat.gz")
if err != nil {
return "", err
}
surnameReader, err := gzip.NewReader(surnameFile)
if err != nil {
return "", err
}
defer surnameReader.Close()
surname, err := readLine(surnameReader, surnameIdx)
return strings.Join([]string{name, surname}, " "), nil
}
func readLine(r io.Reader, line int) (string, error) {
sc := bufio.NewScanner(r)
lastLine := 0
for sc.Scan() {
lastLine++
if lastLine == line {
return sc.Text(), nil
}
}
return "", io.EOF
}