feat: move uxid

Author: vitalvas

uxid/example/main.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/vitalvas/gokit/uxid"
+)
+
+func main() {
+	id := uxid.New().String()
+
+	fmt.Println("id:", id)
+	fmt.Println("id len:", len(id))
+}

uxid/id.go

@@ -0,0 +1,47 @@
+package uxid
+
+import (
+	"math/rand"
+	"strings"
+	"time"
+)
+
+type ID struct {
+	ts   int64
+	rand int64
+}
+
+const encodeDict = "0123456789abcdefghjkmnopqrstuvwxyz"
+
+func init() {
+	rand.Seed(time.Now().UTC().UnixNano())
+}
+
+func New() ID {
+	return NewWithTime(time.Now())
+}
+
+func NewWithTime(t time.Time) ID {
+	return ID{
+		ts:   t.UTC().UnixNano(),
+		rand: rand.Int63(),
+	}
+}
+
+func (id ID) String() string {
+	return encode(id.ts) + encode(id.rand)
+}
+
+func encode(n int64) string {
+	var chars = make([]string, 12, 12)
+
+	encodeDictSize := int64(len(encodeDict))
+
+	for i := len(chars) - 1; i >= 0; i-- {
+		index := n % encodeDictSize
+		chars[i] = string(encodeDict[index])
+		n = n / encodeDictSize
+	}
+
+	return strings.Join(chars, "")
+}

uxid/id_test.go

@@ -0,0 +1,40 @@
+package uxid
+
+import (
+	"testing"
+	"time"
+)
+
+func BenchmarkNew(b *testing.B) {
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			_ = New()
+		}
+	})
+}
+
+func BenchmarkNewWithTime(b *testing.B) {
+	b.RunParallel(func(pb *testing.PB) {
+		ts := time.Now()
+		for pb.Next() {
+			_ = NewWithTime(ts)
+		}
+	})
+}
+
+func BenchmarkNewString(b *testing.B) {
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			_ = New().String()
+		}
+	})
+}
+
+func BenchmarkNewWithTimeString(b *testing.B) {
+	b.RunParallel(func(pb *testing.PB) {
+		ts := time.Now()
+		for pb.Next() {
+			_ = NewWithTime(ts).String()
+		}
+	})
+}

uxid/readme.md

@@ -0,0 +1,3 @@
+# Globally Unique ID Generator
+
+Package uxid is a globally unique id generator library, ready to safely be used directly in your server code.