refactored gametime and utils folder which decouples entrance and sign from channel servers

utils/token/token.go

@@ -0,0 +1,23 @@
+package token
+
+import (
+	"math/rand"
+	"time"
+)
+
+var RNG = NewRNG()
+
+// Generate returns an alphanumeric token of specified length
+func Generate(length int) string {
+	var chars = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
+	b := make([]rune, length)
+	for i := range b {
+		b[i] = chars[RNG.Intn(len(chars))]
+	}
+	return string(b)
+}
+
+// NewRNG returns a new NewRNG generator
+func NewRNG() *rand.Rand {
+	return rand.New(rand.NewSource(time.Now().UnixNano()))
+}