From 8025ebd72c9ee6875fbf105d8792aec520687042 Mon Sep 17 00:00:00 2001
From: Cagdas Tulek <ctulek@gmail.com>
Date: Mon, 23 Nov 2015 11:00:18 -0800
Subject: [PATCH] Added Buffer type for uuid parameter of time func

---
 index.js            | 9 +++++++--
 package.json        | 2 +-
 test/druuid.test.js | 7 +++++++
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/index.js b/index.js
index 7acc5d4..43a56d3 100644
--- a/index.js
+++ b/index.js
@@ -40,7 +40,7 @@ exports.gen = function gen(date, epoch){
  *     druuid.time(11142943683383068069);
  *     // => Sat Feb 04 2012 00:00:00 GMT-0800 (PST)
  *
- * @param {BigInt|Number|String} uuid
+ * @param {BigInt|Number|String|Buffer} uuid
  * @param {Number} [epoch=druuid.epoch] offset
  * @return {Date} when UUID was generated
  * @public
@@ -48,6 +48,11 @@ exports.gen = function gen(date, epoch){
 
 exports.time = function(uuid, epoch){
   if (!epoch) epoch = exports.epoch;
-  var ms = bignum(uuid).shiftRight(64 - 41).toNumber();
+  if (typeof(Buffer) != 'undefined' && uuid instanceof Buffer) {
+      var bn = bignum.fromBuffer(uuid);
+  } else {
+      bn = bignum(uuid);
+  }
+  var ms = bn.shiftRight(64 - 41).toNumber();
   return new Date(ms + epoch);
 };
diff --git a/package.json b/package.json
index cb41c32..1445fdf 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "druuid",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "Date-relative UUIDs",
   "contributors": [
     "Stephen Celis <stephen@recurly.com>"
diff --git a/test/druuid.test.js b/test/druuid.test.js
index ac4d0c1..740066c 100644
--- a/test/druuid.test.js
+++ b/test/druuid.test.js
@@ -66,5 +66,12 @@ describe('druuid', function(){
       });
       after(function(){ druuid.epoch = oldEpoch; });
     });
+
+    context('with uuid as Buffer', function() {
+      var buffer = bignum(uuid).toBuffer();
+      it('determines when a UUID was generated', function(){
+        druuid.time(buffer).should.eql(datetime);
+      });
+    });
   });
 });