From 22aebdcee686824eef21f3a7313dc818d5d2bc32 Mon Sep 17 00:00:00 2001
From: schmoove <ryan@syngency.com>
Date: Mon, 12 Apr 2021 09:24:05 +1200
Subject: [PATCH] Add "useBinary" option to convert to/from binary format for
 DB storage

---
 index.js | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/index.js b/index.js
index d23aaa7..12d9b39 100644
--- a/index.js
+++ b/index.js
@@ -6,6 +6,26 @@
 
 const uuid = require('uuid/v4');
 
+const fromBinaryUUID = function(buf) {
+  return [
+    buf.toString("hex", 4, 8),
+    buf.toString("hex", 2, 4),
+    buf.toString("hex", 0, 2),
+    buf.toString("hex", 8, 10),
+    buf.toString("hex", 10, 16),
+  ].join("-");
+};
+
+const toBinaryUUID = function(uuid) {
+  const buf = Buffer.from(uuid.replace(/-/g, ""), "hex");
+  return Buffer.concat([
+    buf.slice(6, 8),
+    buf.slice(4, 6),
+    buf.slice(0, 4),
+    buf.slice(8, 16),
+  ]);
+};
+
 /**
  * Export `guid`.
  */
@@ -14,6 +34,7 @@ module.exports = options => {
   options = Object.assign(
     {
       field: 'id',
+      useBinary: false,
       generateGuid: () => uuid()
     },
     options
@@ -21,6 +42,23 @@ module.exports = options => {
 
   return Model => {
     return class extends Model {
+      
+      /**
+       * After find.
+       */
+
+      $afterFind(context) {
+        const parent = super.$afterFind(context);
+
+        return Promise.resolve(parent)
+          .then(() => {
+            if ( options.useBinary ) {            
+              this[options.field] = fromBinaryUUID(this[options.field]);
+            }
+          });
+
+      }
+      
       /**
        * Before insert.
        */
@@ -34,6 +72,10 @@ module.exports = options => {
               this[options.field] || options.generateGuid.call(this, context)
           )
           .then(guid => {
+            if ( options.useBinary ) {
+              guid = toBinaryUUID(guid)
+            }
+            
             this[options.field] = guid;
           });
       }