Add class info helper

Author: sebastiaanluca

src/Classes/ProvidesClassInfo.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace SebastiaanLuca\PhpHelpers\Classes;
+
+use ReflectionClass;
+
+Trait ProvidesClassInfo
+{
+    protected $classDirectory;
+
+    /**
+     * Get the directory of the current class.
+     *
+     * Uses reflection to get the directory of the child class instead of the parent if applicable.
+     *
+     * @return string
+     */
+    protected function getClassDirectory() : string
+    {
+        // Some primitive caching
+        if ($this->classDirectory) {
+            return $this->classDirectory;
+        }
+
+        $reflection = new ReflectionClass(get_class($this));
+
+        $this->classDirectory = dirname($reflection->getFileName());
+
+        return $this->classDirectory;
+    }
+}

tests/Unit/Classes/ProvidesClassInfoTest.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace SebastiaanLuca\Helpers\Tests\Unit\Classes;
+
+use ReflectionClass;
+use SebastiaanLuca\PhpHelpers\Classes\ProvidesClassInfo;
+use SebastiaanLuca\PhpHelpers\Tests\TestCase;
+
+class ProvidesClassInfoTest extends TestCase
+{
+    /**
+     * @test
+     */
+    public function it returns the class directory() : void
+    {
+        $class = new class
+        {
+            use ProvidesClassInfo;
+
+            public function getDirectory()
+            {
+                return $this->getClassDirectory();
+            }
+        };
+
+        $this->assertSame(
+            dirname((new ReflectionClass($this))->getFileName()),
+            $class->getDirectory()
+        );
+    }
+}