performance improvements (#2329)

* remove work from constructor
* refactor twig extensions
* upgrade theme
* replace sub-request with direct template rendering

src/Twig/Runtime/MarkdownExtension.php

@@ -0,0 +1,101 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Twig\Runtime;
+
+use App\Configuration\SystemConfiguration;
+use App\Utils\Markdown;
+use Twig\Extension\RuntimeExtensionInterface;
+
+final class MarkdownExtension implements RuntimeExtensionInterface
+{
+    /**
+     * @var Markdown
+     */
+    private $markdown;
+    /**
+     * @var SystemConfiguration
+     */
+    private $configuration;
+    /**
+     * @var bool|null
+     */
+    private $markdownEnabled;
+
+    public function __construct(Markdown $parser, SystemConfiguration $configuration)
+    {
+        $this->markdown = $parser;
+        $this->configuration = $configuration;
+    }
+
+    private function isMarkdownEnabled(): bool
+    {
+        if (null === $this->markdownEnabled) {
+            $this->markdownEnabled = $this->configuration->isTimesheetMarkdownEnabled();
+        }
+
+        return $this->markdownEnabled;
+    }
+
+    /**
+     * Transforms the entities comment (customer, project, activity ...) into HTML.
+     *
+     * @param string|null $content
+     * @param bool $fullLength
+     * @return string
+     */
+    public function commentContent(?string $content, bool $fullLength = false): string
+    {
+        if (empty($content)) {
+            return '';
+        }
+
+        if (!$fullLength && \strlen($content) > 101) {
+            $content = trim(substr($content, 0, 100)) . ' &hellip;';
+        }
+
+        if ($this->isMarkdownEnabled()) {
+            $content = $this->markdown->toHtml($content, false);
+        } elseif ($fullLength) {
+            $content = '<p>' . nl2br($content) . '</p>';
+        }
+
+        return $content;
+    }
+
+    /**
+     * Transforms the timesheet description content into HTML.
+     *
+     * @param string|null $content
+     * @return string
+     */
+    public function timesheetContent(?string $content): string
+    {
+        if (empty($content)) {
+            return '';
+        }
+
+        if ($this->isMarkdownEnabled()) {
+            return $this->markdown->toHtml($content, false);
+        }
+
+        return nl2br($content);
+    }
+
+    /**
+     * Transforms the given Markdown content into HTML
+     *
+     * @param string $content
+     * @return string
+     */
+    public function markdownToHtml(string $content): string
+    {
+        return $this->markdown->toHtml($content, false);
+    }
+}