feat: add secure on-demand HLS playback plugin

tests/Support/TemporaryDirectoryTestCase.php

@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Plugin\AzuraCastOnDemandHls\Tests\Support;
+
+use PHPUnit\Framework\TestCase;
+
+abstract class TemporaryDirectoryTestCase extends TestCase
+{
+    protected string $temporaryDirectory;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->temporaryDirectory = sys_get_temp_dir() . '/ondemand-hls-test-' . bin2hex(random_bytes(8));
+        mkdir($this->temporaryDirectory, 0700, true);
+    }
+
+    protected function tearDown(): void
+    {
+        $this->removeTree($this->temporaryDirectory);
+        parent::tearDown();
+    }
+
+    private function removeTree(string $path): void
+    {
+        if (is_link($path) || is_file($path)) {
+            @unlink($path);
+            return;
+        }
+        if (!is_dir($path)) {
+            return;
+        }
+        foreach (new \FilesystemIterator($path, \FilesystemIterator::SKIP_DOTS) as $item) {
+            $this->removeTree($item->getPathname());
+        }
+        @rmdir($path);
+    }
+}