initial commit

vendor/github.com/labstack/gommon/random/random.go

@@ -0,0 +1,48 @@
+package random
+
+import (
+	"math/rand"
+	"strings"
+	"time"
+)
+
+type (
+	Random struct {
+	}
+)
+
+// Charsets
+const (
+	Uppercase    string = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	Lowercase           = "abcdefghijklmnopqrstuvwxyz"
+	Alphabetic          = Uppercase + Lowercase
+	Numeric             = "0123456789"
+	Alphanumeric        = Alphabetic + Numeric
+	Symbols             = "`" + `~!@#$%^&*()-_+={}[]|\;:"<>,./?`
+	Hex                 = Numeric + "abcdef"
+)
+
+var (
+	global = New()
+)
+
+func New() *Random {
+	rand.Seed(time.Now().UnixNano())
+	return new(Random)
+}
+
+func (r *Random) String(length uint8, charsets ...string) string {
+	charset := strings.Join(charsets, "")
+	if charset == "" {
+		charset = Alphanumeric
+	}
+	b := make([]byte, length)
+	for i := range b {
+		b[i] = charset[rand.Int63()%int64(len(charset))]
+	}
+	return string(b)
+}
+
+func String(length uint8, charsets ...string) string {
+	return global.String(length, charsets...)
+}