From 8669e0db2b94461ff2f0e0112ef7c8dab4daebcc Mon Sep 17 00:00:00 2001
From: Dominik Voda <d.voda94@gmail.com>
Date: Wed, 19 Aug 2020 14:08:16 +0200
Subject: [PATCH] + DateTimeModifier (#14)

---
 src/DateTimeModifier.php     |  40 ++++++++
 src/DateTimeModifierTest.php | 175 +++++++++++++++++++++++++++++++++++
 2 files changed, 215 insertions(+)
 create mode 100644 src/DateTimeModifier.php
 create mode 100644 src/DateTimeModifierTest.php

diff --git a/src/DateTimeModifier.php b/src/DateTimeModifier.php
new file mode 100644
index 0000000..7ee3a69
--- /dev/null
+++ b/src/DateTimeModifier.php
@@ -0,0 +1,40 @@
+<?php declare(strict_types = 1);
+
+namespace BrandEmbassy\DateTime;
+
+use DateTimeImmutable;
+use DateTimeZone;
+use Nette\StaticClass;
+
+final class DateTimeModifier
+{
+    use StaticClass;
+
+
+    public static function getBeginningOfTheDay(DateTimeImmutable $originDateTime): DateTimeImmutable
+    {
+        return $originDateTime->modify('midnight');
+    }
+
+
+    public static function getEndOfTheDay(DateTimeImmutable $originDateTime): DateTimeImmutable
+    {
+        return $originDateTime->modify('tomorrow')->modify('-1 second');
+    }
+
+
+    public static function getBeginningOfTheDayInTimezone(
+        DateTimeImmutable $originDateTime,
+        DateTimeZone $dateTimeZone
+    ): DateTimeImmutable {
+        return self::getBeginningOfTheDay($originDateTime->setTimezone($dateTimeZone));
+    }
+
+
+    public static function getEndOfTheDayInTimezone(
+        DateTimeImmutable $originDateTime,
+        DateTimeZone $dateTimeZone
+    ): DateTimeImmutable {
+        return self::getEndOfTheDay($originDateTime->setTimezone($dateTimeZone));
+    }
+}
diff --git a/src/DateTimeModifierTest.php b/src/DateTimeModifierTest.php
new file mode 100644
index 0000000..faa85e6
--- /dev/null
+++ b/src/DateTimeModifierTest.php
@@ -0,0 +1,175 @@
+<?php declare(strict_types = 1);
+
+namespace BrandEmbassy\DateTime;
+
+use DateTimeZone;
+use PHPUnit\Framework\Assert;
+use PHPUnit\Framework\TestCase;
+
+final class DateTimeModifierTest extends TestCase
+{
+    /**
+     * @dataProvider getBeginningOfTheDayDataProvider
+     */
+    public function testGetBeginningOfTheDay(string $expectedAtom, string $originAtom): void
+    {
+        $originDateTime = DateTimeFromString::createFromAtom($originAtom);
+        $expectedDateTime = DateTimeFromString::createFromAtom($expectedAtom);
+
+        Assert::assertSame(
+            DateTimeFormatter::formatAsAtom($expectedDateTime),
+            DateTimeFormatter::formatAsAtom(DateTimeModifier::getBeginningOfTheDay($originDateTime))
+        );
+    }
+
+
+    /**
+     * @return string[][]
+     */
+    public function getBeginningOfTheDayDataProvider(): array
+    {
+        return [
+            ['expectedAtom' => '2020-08-18T00:00:00+02:00', 'originAtom' => '2020-08-18T02:18:18+02:00'],
+            ['expectedAtom' => '2020-08-18T00:00:00+02:00', 'originAtom' => '2020-08-18T00:00:00+02:00'],
+            ['expectedAtom' => '2020-08-18T00:00:00+02:00', 'originAtom' => '2020-08-18T23:59:59+02:00'],
+            ['expectedAtom' => '2020-08-18T00:00:00+01:00', 'originAtom' => '2020-08-18T00:00:01+01:00'],
+            ['expectedAtom' => '2020-08-18T00:00:00+01:00', 'originAtom' => '2020-08-18T11:59:00+01:00'],
+            ['expectedAtom' => '2020-08-18T00:00:00-04:00', 'originAtom' => '2020-08-18T11:59:00-04:00'],
+        ];
+    }
+
+
+    /**
+     * @dataProvider getBeginningOfTheDayInTimezoneDataProvider
+     */
+    public function testGetBeginningOfTheDayInTimezone(
+        string $expectedAtom,
+        string $originAtom,
+        string $dateTimeZoneName
+    ): void {
+        $originDateTime = DateTimeFromString::createFromAtom($originAtom);
+        $expectedDateTime = DateTimeFromString::createFromAtom($expectedAtom);
+
+        $dateTimeZone = new DateTimeZone($dateTimeZoneName);
+
+        Assert::assertSame(
+            DateTimeFormatter::formatAsAtom($expectedDateTime),
+            DateTimeFormatter::formatAsAtom(
+                DateTimeModifier::getBeginningOfTheDayInTimezone($originDateTime, $dateTimeZone)
+            )
+        );
+    }
+
+
+    /**
+     * @return string[][]
+     */
+    public function getBeginningOfTheDayInTimezoneDataProvider(): array
+    {
+        return [
+            [
+                'expectedAtom' => '2020-08-18T00:00:00+00:00',
+                'originAtom' => '2020-08-18T02:18:18+02:00',
+                'dateTimeZoneName' => 'UTC',
+            ],
+            [
+                'expectedAtom' => '2020-08-18T00:00:00+02:00',
+                'originAtom' => '2020-08-18T02:18:18+02:00',
+                'dateTimeZoneName' => 'Europe/Prague',
+            ],
+            [
+                'expectedAtom' => '2020-08-18T00:00:00+01:00',
+                'originAtom' => '2020-08-18T02:18:18+02:00',
+                'dateTimeZoneName' => 'Europe/London',
+            ],
+            [
+                'expectedAtom' => '2020-08-17T00:00:00-06:00',
+                'originAtom' => '2020-08-18T02:18:18+02:00',
+                'dateTimeZoneName' => 'America/Denver',
+            ],
+        ];
+    }
+
+
+    /**
+     * @dataProvider getEndOfTheDayDataProvider
+     */
+    public function testGetEndOfTheDay(string $expectedAtom, string $originAtom): void
+    {
+        $originDateTime = DateTimeFromString::createFromAtom($originAtom);
+        $expectedDateTime = DateTimeFromString::createFromAtom($expectedAtom);
+
+        Assert::assertSame(
+            DateTimeFormatter::formatAsAtom($expectedDateTime),
+            DateTimeFormatter::formatAsAtom(DateTimeModifier::getEndOfTheDay($originDateTime))
+        );
+    }
+
+
+    /**
+     * @return string[][]
+     */
+    public function getEndOfTheDayDataProvider(): array
+    {
+        return [
+            ['expectedAtom' => '2020-08-18T23:59:59+02:00', 'originAtom' => '2020-08-18T02:18:18+02:00'],
+            ['expectedAtom' => '2020-08-18T23:59:59+02:00', 'originAtom' => '2020-08-18T23:59:59+02:00'],
+            ['expectedAtom' => '2020-08-18T23:59:59+01:00', 'originAtom' => '2020-08-18T00:00:01+01:00'],
+            ['expectedAtom' => '2020-08-18T23:59:59+01:00', 'originAtom' => '2020-08-18T11:59:00+01:00'],
+            ['expectedAtom' => '2020-08-18T23:59:59+01:00', 'originAtom' => '2020-08-18T23:59:59+01:00'],
+            ['expectedAtom' => '2020-08-18T23:59:59-04:00', 'originAtom' => '2020-08-18T11:59:00-04:00'],
+        ];
+    }
+
+
+    /**
+     * @dataProvider getEndOfTheDayInTimezoneDataProvider
+     */
+    public function testGetEndOfTheDayInTimezone(
+        string $expectedAtom,
+        string $originAtom,
+        string $dateTimeZoneName
+    ): void {
+        $originDateTime = DateTimeFromString::createFromAtom($originAtom);
+        $expectedDateTime = DateTimeFromString::createFromAtom($expectedAtom);
+
+        $dateTimeZone = new DateTimeZone($dateTimeZoneName);
+
+        Assert::assertSame(
+            DateTimeFormatter::formatAsAtom($expectedDateTime),
+            DateTimeFormatter::formatAsAtom(
+                DateTimeModifier::getEndOfTheDayInTimezone($originDateTime, $dateTimeZone)
+            )
+        );
+    }
+
+
+    /**
+     * @return string[][]
+     */
+    public function getEndOfTheDayInTimezoneDataProvider(): array
+    {
+        return [
+            [
+                'expectedAtom' => '2020-08-18T23:59:59+00:00',
+                'originAtom' => '2020-08-18T02:18:18+02:00',
+                'dateTimeZoneName' => 'UTC',
+            ],
+            [
+                'expectedAtom' => '2020-08-18T23:59:59+02:00',
+                'originAtom' => '2020-08-18T02:18:18+02:00',
+                'dateTimeZoneName' => 'Europe/Prague',
+            ],
+            [
+                'expectedAtom' => '2020-08-18T23:59:59+01:00',
+                'originAtom' => '2020-08-18T02:18:18+02:00',
+                'dateTimeZoneName' => 'Europe/London',
+            ],
+            [
+                'expectedAtom' => '2020-08-17T23:59:59-06:00',
+                'originAtom' => '2020-08-18T02:18:18+02:00',
+                'dateTimeZoneName' => 'America/Denver',
+            ],
+        ];
+    }
+}