From 6b20ea6f1630f208612f8c6019548b8b408d3e0f Mon Sep 17 00:00:00 2001
From: Nabeel Shahzad <nshahzad@gmail.com>
Date: Wed, 16 Aug 2017 08:29:05 -0500
Subject: [PATCH] set days of week using bitwise operators

---
 app/Facades/Utils.php | 24 ++++++++++++++++++++++++
 config/enums.php      | 10 ++++++++++
 tests/UtilsTest.php   | 13 +++++++++++++
 3 files changed, 47 insertions(+)
 create mode 100644 tests/UtilsTest.php

diff --git a/app/Facades/Utils.php b/app/Facades/Utils.php
index 1378f884..4fd24b90 100644
--- a/app/Facades/Utils.php
+++ b/app/Facades/Utils.php
@@ -16,4 +16,28 @@ class Utils extends Facade
 
         return $dtF->diff($dtT)->format($format);
     }
+
+    /**
+     * Bitwise operator for setting days of week to integer field
+     * @param int $datefield initial datefield
+     * @param array $day_enums Array of values from config("enum.days")
+     * @return int
+     */
+    public static function setDays(int $datefield, array $day_enums) {
+        foreach($day_enums as $day) {
+            $datefield |= $day;
+        }
+
+        return $datefield;
+    }
+
+    /**
+     * Bit check if a day exists within a integer bitfield
+     * @param int $datefield datefield from database
+     * @param int $day_enum Value from config("enum.days")
+     * @return bool
+     */
+    public static function hasDay(int $datefield, int $day_enum) {
+        return ($datefield & $day_enum) === $datefield;
+    }
 }
diff --git a/config/enums.php b/config/enums.php
index 29893d8b..4fe0312f 100644
--- a/config/enums.php
+++ b/config/enums.php
@@ -26,5 +26,15 @@ return [
         'MOGAS' => 2,
     ],
 
+    'days' => [
+        'MONDAY'    => 1,
+        'TUESDAY'   => 2,
+        'WEDNESDAY' => 4,
+        'THURSDAY'  => 8,
+        'FRIDAY'    => 16,
+        'SATURDAY'  => 32,
+        'SUNDAY'    => 64
+    ],
+
 ];
 
diff --git a/tests/UtilsTest.php b/tests/UtilsTest.php
new file mode 100644
index 00000000..46b20008
--- /dev/null
+++ b/tests/UtilsTest.php
@@ -0,0 +1,13 @@
+<?php
+
+use App\Facades\Utils;
+
+class UtilsTest extends TestCase
+{
+    public function setUp() {
+    }
+
+    public function testSecondsToTime() {
+        print_r(Utils::secondsToTime(3600));
+    }
+}