From 30bc68e6e2d642ec1a8258de377d46782825f616 Mon Sep 17 00:00:00 2001
From: Valentin Popov <info@valentineus.link>
Date: Wed, 15 Jul 2020 16:48:22 +0400
Subject: Added integer parser

Signed-off-by: Valentin Popov <info@valentineus.link>
---
 src/Parsers/IntegerParser.php       | 36 +++++++++++++++++++++++++++++++++
 tests/Parsers/IntegerParserTest.php | 40 +++++++++++++++++++++++++++++++++++++
 2 files changed, 76 insertions(+)
 create mode 100644 src/Parsers/IntegerParser.php
 create mode 100644 tests/Parsers/IntegerParserTest.php

diff --git a/src/Parsers/IntegerParser.php b/src/Parsers/IntegerParser.php
new file mode 100644
index 0000000..95df2dd
--- /dev/null
+++ b/src/Parsers/IntegerParser.php
@@ -0,0 +1,36 @@
+<?php
+/**
+ * Copyright 2020 “EPGService”
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an “AS IS” BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+declare(strict_types = 1);
+
+namespace EPGService\Parsers;
+
+/**
+ * @copyright Copyright © 2020 “Valentin Popov” <info@valentineus.link>
+ * @license   http://www.apache.org/licenses/LICENSE-2.0
+ * @package   EPGService\Parsers
+ */
+final class IntegerParser {
+	/**
+	 * @param mixed $value
+	 *
+	 * @return int|null
+	 */
+	public static function get($value): ?int {
+		return filter_var($value, FILTER_VALIDATE_INT, FILTER_NULL_ON_FAILURE);
+	}
+}
diff --git a/tests/Parsers/IntegerParserTest.php b/tests/Parsers/IntegerParserTest.php
new file mode 100644
index 0000000..7f5cce7
--- /dev/null
+++ b/tests/Parsers/IntegerParserTest.php
@@ -0,0 +1,40 @@
+<?php
+/**
+ * Copyright 2020 “EPGService”
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an “AS IS” BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+declare(strict_types = 1);
+
+namespace Tests\Parsers;
+
+use EPGService\Parsers\IntegerParser;
+use Faker\Factory as Faker;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @copyright Copyright © 2020 “Valentin Popov” <info@valentineus.link>
+ * @license   http://www.apache.org/licenses/LICENSE-2.0
+ * @package   Tests\Parsers
+ */
+final class IntegerParserTest extends TestCase {
+	public function testInvalid(): void {
+		self::assertNull(IntegerParser::get(null));
+	}
+
+	public function testValid(): void {
+		$number = Faker::create()->numberBetween(100, 200);
+		self::assertEquals($number, IntegerParser::get((string) $number));
+	}
+}
-- 
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