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lib/pkp/controllers/page/PageHandler.php

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+<?php
+
+/**
+ * @file lib/pkp/controllers/page/PageHandler.php
+ *
+ * Copyright (c) 2014-2021 Simon Fraser University
+ * Copyright (c) 2003-2021 John Willinsky
+ * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
+ *
+ * @class PageHandler
+ *
+ * @ingroup controllers_page
+ *
+ * @brief Handler for requests for page components such as the header, tasks,
+ *  usernav, and CSS.
+ */
+
+namespace PKP\controllers\page;
+
+use APP\handler\Handler;
+use APP\template\TemplateManager;
+use PKP\core\JSONMessage;
+use PKP\core\PKPRequest;
+use PKP\plugins\Hook;
+use PKP\plugins\PluginRegistry;
+use PKP\security\authorization\PKPSiteAccessPolicy;
+
+class PageHandler extends Handler
+{
+    //
+    // Implement template methods from PKPHandler
+    //
+    /**
+     * @copydoc PKPHandler::authorize()
+     */
+    public function authorize($request, &$args, $roleAssignments)
+    {
+        $this->addPolicy(new PKPSiteAccessPolicy(
+            $request,
+            ['tasks', 'css'],
+            PKPSiteAccessPolicy::SITE_ACCESS_ALL_ROLES
+        ));
+
+        $this->setEnforceRestrictedSite(false);
+        return parent::authorize($request, $args, $roleAssignments);
+    }
+
+
+    //
+    // Public operations
+    //
+    /**
+     * Display the tasks component
+     *
+     * @param array $args
+     * @param PKPRequest $request
+     *
+     * @return JSONMessage JSON object
+     */
+    public function tasks($args, $request)
+    {
+        $this->setupTemplate($request);
+        $templateMgr = TemplateManager::getManager($request);
+        return $templateMgr->fetchJson('controllers/page/tasks.tpl');
+    }
+
+    /**
+     * Get the compiled CSS
+     *
+     * @param array $args
+     * @param PKPRequest $request
+     */
+    public function css($args, $request)
+    {
+        header('Content-Type: text/css');
+
+        $templateManager = TemplateManager::getManager($request);
+
+        $name = $request->getUserVar('name');
+        if (empty($name)) {
+            $name = 'pkp-lib';
+        }
+        switch ($name) {
+            // The core app stylesheet
+            case 'pkp-lib':
+                $cachedFile = $templateManager->getCachedLessFilePath($name);
+                if (!file_exists($cachedFile)) {
+                    $styles = $templateManager->compileLess($name, 'styles/index.less');
+                    if (!$templateManager->cacheLess($cachedFile, $styles)) {
+                        echo $styles;
+                        exit;
+                    }
+                }
+                break;
+
+            default:
+
+                // Backwards compatibility. This hook is deprecated.
+                if (Hook::getHooks('PageHandler::displayCss')) {
+                    $result = '';
+                    $lastModified = null;
+                    Hook::call('PageHandler::displayCss', [$request, &$name, &$result, &$lastModified]);
+                    if ($lastModified) {
+                        header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $lastModified) . ' GMT');
+                    }
+                    header('Content-Length: ' . strlen($result));
+                    echo $result;
+                    exit;
+                } else {
+                    $cachedFile = $templateManager->getCachedLessFilePath($name);
+                    if (!file_exists($cachedFile)) {
+                        // Process styles registered with the current theme
+                        $styles = '';
+                        $themes = PluginRegistry::loadCategory('themes', true);
+                        foreach ($themes as $theme) {
+                            if ($theme->isActive()) {
+                                $style = $theme->getStyle($name);
+                                if (!empty($style)) {
+                                    // Compile and cache the stylesheet
+                                    $styles = $templateManager->compileLess(
+                                        $name,
+                                        $style['style'],
+                                        [
+                                            'baseUrl' => $style['baseUrl'] ?? null,
+                                            'addLess' => $style['addLess'] ?? null,
+                                            'addLessVariables' => $style['addLessVariables'] ?? null,
+                                        ]
+                                    );
+                                }
+                                break;
+                            }
+                        }
+
+                        // If we still haven't found styles, fire off a hook
+                        // which allows other types of plugins to handle
+                        // requests
+                        if (!$styles) {
+                            Hook::call(
+                                'PageHandler::getCompiledLess',
+                                [
+                                    'request' => $request,
+                                    'name' => &$name,
+                                    'styles' => &$styles,
+                                ]
+                            );
+                        }
+
+                        // Give up if there are still no styles
+                        if (!$styles) {
+                            exit;
+                        }
+
+                        // Try to save the styles to a cached file. If we can't,
+                        // just print them out
+                        if (!$templateManager->cacheLess($cachedFile, $styles)) {
+                            echo $styles;
+                            exit;
+                        }
+                    }
+                }
+                break;
+        }
+
+        // Deliver the cached file
+        header('Last-Modified: ' . gmdate('D, d M Y H:i:s', filemtime($cachedFile)) . ' GMT');
+        header('Content-Length: ' . filesize($cachedFile));
+        readfile($cachedFile);
+        exit;
+    }
+}
+
+
+if (!PKP_STRICT_MODE) {
+    class_alias('\PKP\controllers\page\PageHandler', '\PageHandler');
+}