1 files changed, 47 insertions, 0 deletions
diff --git a/internal/command/objectid.go b/internal/command/objectid.go
new file mode 100644
index 0000000..6eda868
--- /dev/null
+++ b/internal/command/objectid.go
@@ -0,0 +1,47 @@
+package command
+
+import (
+	"encoding/binary"
+	"encoding/hex"
+	"math/rand"
+	"time"
+)
+
+var iterator uint64
+
+func init() {
+	rand.Seed(time.Now().UnixMicro())
+	iterator = rand.Uint64()
+}
+
+func NewObjectID() ObjectID {
+	iterator++
+	p1 := uint64(time.Now().UnixMicro())
+	p2 := iterator
+	p3 := rand.Uint64()
+	r := ObjectID{}
+	r = binary.BigEndian.AppendUint64(r, p1)
+	r = binary.BigEndian.AppendUint64(r, p2)
+	r = binary.BigEndian.AppendUint64(r, p3)
+	return r
+}
+
+type ObjectID []byte
+
+func (o ObjectID) MarshalJSON() ([]byte, error) {
+	res := make([]byte, 0, hex.EncodedLen(len(o)))
+	hex.Encode(res, o)
+	return res, nil
+}
+
+func (o ObjectID) String() string {
+	return hex.EncodeToString(o)
+}
+
+func (o ObjectID) Time() time.Time {
+	if len(o) < 8 {
+		return time.Time{}
+	}
+	t := o[:8]
+	return time.UnixMicro(int64(binary.BigEndian.Uint64(t)))
+}