MC-14937: Complete Page Builder Analytics data collection

- Introduce custom collector to ensure Page Builder configuration is loaded from adminhtml

Author: davemacaulay

app/code/Magento/PageBuilder/Model/View/File/Collector/PageBuilder.php

@@ -0,0 +1,74 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+declare(strict_types=1);
+
+namespace Magento\PageBuilder\Model\View\File\Collector;
+
+use Magento\Framework\Component\ComponentRegistrar;
+use Magento\Framework\Component\DirSearch;
+use Magento\Framework\View\Design\ThemeInterface;
+use Magento\Framework\View\File\CollectorInterface;
+use Magento\Framework\View\File\Factory as FileFactory;
+
+/**
+ * Source of Page Builder view files introduced by modules
+ */
+class PageBuilder implements CollectorInterface
+{
+    /**
+     * @var DirSearch
+     */
+    protected $componentDirSearch;
+
+    /**
+     * @var string
+     */
+    private $subDir;
+
+    /**
+     * @var FileFactory
+     */
+    private $fileFactory;
+
+    /**
+     * Constructor
+     *
+     * @param DirSearch $dirSearch
+     * @param FileFactory $fileFactory
+     * @param string $subDir
+     */
+    public function __construct(
+        DirSearch $dirSearch,
+        FileFactory $fileFactory,
+        $subDir = ''
+    ) {
+        $this->componentDirSearch = $dirSearch;
+        $this->fileFactory = $fileFactory;
+        $this->subDir = $subDir ? $subDir . '/' : '';
+    }
+
+    /**
+     * Retrieve files, they're only contained within the adminhtml directory
+     *
+     * @param \Magento\Framework\View\Design\ThemeInterface $theme
+     * @param string $filePath
+     * @return \Magento\Framework\View\File[]
+     */
+    public function getFiles(ThemeInterface $theme, $filePath)
+    {
+        $adminArea = \Magento\Framework\App\Area::AREA_ADMINHTML;
+        $result = [];
+        $pageBuilderFiles = $this->componentDirSearch->collectFilesWithContext(
+            ComponentRegistrar::MODULE,
+            "view/{$adminArea}/{$this->subDir}{$filePath}"
+        );
+        foreach ($pageBuilderFiles as $file) {
+            $result[] = $this->fileFactory->create($file->getFullPath(), $file->getComponentName(), null, true);
+        }
+        return $result;
+    }
+}

app/code/Magento/PageBuilder/etc/di.xml

@@ -102,7 +102,7 @@
             </argument>
         </arguments>
     </type>
-    <virtualType name="pageBuilderComponentAggregatedSourceBase" type="Magento\Framework\View\File\Collector\Base">
+    <virtualType name="pageBuilderComponentAggregatedSourceBase" type="Magento\PageBuilder\Model\View\File\Collector\PageBuilder">
         <arguments>
             <argument name="subDir" xsi:type="string">pagebuilder</argument>
         </arguments>