Added FriendlyID() ID generator for human-friendly IDs

generate/id.go

@@ -19,6 +19,28 @@ func ID() string {
 	return strings.ToLower(hex.EncodeToString(bytes))
 }
 
+// FriendlyID generates a human-friendly ID that has a higher uniqueness,
+// and a limited alphabet designed for human readability and manual copying.
+//
+// There are 7.98e+22 IDs in a 16-length ID, which means that if there are
+// 10,000 items, you're as likely to guess one as winning the grand prize
+// of the biggest lotteries around the world billions of times in a row.
+func FriendlyID(length int) string {
+	const alphabet = "0123456789abcdfghjkmpqrtvxy"
+	const alphabetLength = byte(len(alphabet))
+
+	// Generate random bytes
+	results := make([]byte, length)
+	rand.Read(results)
+
+	// Truncate it within the alphabet
+	for i := 0; i < 16; i++ {
+		results[i] = alphabet[results[i]%alphabetLength]
+	}
+
+	return string(results)
+}
+
 // SessionID generates a 48 character hex string with crypto/rand
 func SessionID() string {
 	bytes := make([]byte, 24)