Create new Flarum\Frontend namespace

It replaces the old Http\WebApp namespace and swallows other namespaces
and files, such as Flarum\Asset.

src/Frontend/Asset/LessCompiler.php

@@ -0,0 +1,70 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * (c) Toby Zerner <toby.zerner@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Flarum\Frontend\Asset;
+
+use Less_Exception_Parser;
+use Less_Parser;
+
+class LessCompiler extends RevisionCompiler
+{
+    /**
+     * @var string
+     */
+    protected $cachePath;
+
+    /**
+     * @param string $path
+     * @param string $filename
+     * @param bool $watch
+     * @param string $cachePath
+     */
+    public function __construct($path, $filename, $watch, $cachePath)
+    {
+        parent::__construct($path, $filename, $watch);
+
+        $this->cachePath = $cachePath;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function compile()
+    {
+        if (! count($this->files) || ! count($this->strings)) {
+            return;
+        }
+
+        ini_set('xdebug.max_nesting_level', 200);
+
+        $parser = new Less_Parser([
+            'compress' => true,
+            'cache_dir' => $this->cachePath,
+            'import_dirs' => [
+                base_path().'/vendor/components/font-awesome/less' => '',
+            ],
+        ]);
+
+        try {
+            foreach ($this->files as $file) {
+                $parser->parseFile($file);
+            }
+
+            foreach ($this->strings as $callback) {
+                $parser->parse($callback());
+            }
+
+            return $parser->getCss();
+        } catch (Less_Exception_Parser $e) {
+            // TODO: log an error somewhere?
+        }
+    }
+}