Second Commit

generate/id.go

@@ -0,0 +1,28 @@
+package generate
+
+import (
+	"crypto/rand"
+	"encoding/binary"
+	"encoding/hex"
+	"strings"
+	"time"
+)
+
+// ID generates a 24 character hex string from 8 bytes of current time
+// in ns and 4 bytes of crypto-random. In practical terms, that makes
+// them orderable.
+func ID() string {
+	bytes := make([]byte, 12)
+	binary.BigEndian.PutUint64(bytes, uint64(time.Now().UnixNano()))
+	rand.Read(bytes[8:])
+
+	return strings.ToLower(hex.EncodeToString(bytes))
+}
+
+// SessionID generates a 48 character hex string with crypto/rand
+func SessionID() string {
+	bytes := make([]byte, 24)
+	rand.Read(bytes)
+
+	return strings.ToLower(hex.EncodeToString(bytes))
+}