38 lines
687 B
Go
38 lines
687 B
Go
package main
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import (
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"crypto/md5"
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"fmt"
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"io"
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"time"
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)
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// This thing contains a channel that when initialized (see NewIdGenerator)
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// will return a bunch of (as best as I can tell) unique md5 hashes.
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//
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// we use this for naming players, games, etc.
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//
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// It will consume a single goroutine
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type IdGenerator struct {
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id chan int64
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}
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func NewIdGenerator() *IdGenerator {
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g := IdGenerator{}
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g.id = make(chan int64)
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go func() {
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var i int64
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for i = 0; ; i++ {
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g.id <- i
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}
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}()
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return &g
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}
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func (id *IdGenerator) Hash() string {
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h := md5.New()
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ns := time.Now().UnixNano() + <-id.id
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io.WriteString(h, fmt.Sprintf("%d", ns))
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return fmt.Sprintf("%x", h.Sum(nil))[:8]
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}
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