44 lines
1003 B
Go
44 lines
1003 B
Go
package botserv
|
|
|
|
import (
|
|
"crypto/md5"
|
|
"fmt"
|
|
"io"
|
|
"time"
|
|
)
|
|
|
|
// This thing contains a channel that when initialized (see NewIdGenerator)
|
|
// will return a bunch of (as best as I can tell) unique md5 hashes.
|
|
//
|
|
// we use this for naming players, games, etc.
|
|
//
|
|
// It will consume a single goroutine
|
|
type IdGenerator struct {
|
|
id chan int64
|
|
}
|
|
|
|
func NewIdGenerator() *IdGenerator {
|
|
return &IdGenerator{
|
|
id: make(chan int64),
|
|
}
|
|
}
|
|
|
|
// Run is called (typically in a gorotine) to allow for queries to be made
|
|
// against IdGenerator.id throgh the Hash method.
|
|
func (idg *IdGenerator) Run() {
|
|
var i int64
|
|
for i = 0; ; i++ {
|
|
idg.id <- i
|
|
}
|
|
}
|
|
|
|
// Hash is the method used by a properly instantiated IdGenerator that gives
|
|
// fairly unique strings. They are currently truncated md5 hashes of the time
|
|
// plus a unique counter
|
|
func (id *IdGenerator) Hash() string {
|
|
h := md5.New()
|
|
ns := time.Now().UnixNano() + <-id.id
|
|
io.WriteString(h, fmt.Sprintf("%d", ns))
|
|
return fmt.Sprintf("%x", h.Sum(nil))[:8]
|
|
}
|