BrowseBySectionHandler.inc.php

<?php
 
import('classes.handler.Handler');
 
class BrowseBySectionHandler extends Handler {
 
   function authorize($request, &$args, $roleAssignments) {
      import('lib.pkp.classes.security.authorization.ContextRequiredPolicy');
      $this->addPolicy(new ContextRequiredPolicy($request));
 
      import('classes.security.authorization.OjsJournalMustPublishPolicy');
      $this->addPolicy(new OjsJournalMustPublishPolicy($request));
 
      return parent::authorize($request, $args, $roleAssignments);
   }
 
   public function view($args, $request) {
      $sectionPath = isset($args[0]) ? $args[0] : null;
      $page = isset($args[1]) && ctype_digit((string) $args[1]) ? (int) $args[1] : 1;
      $context = $request->getContext();
      $contextId = $context ? $context->getId() : CONTEXT_ID_NONE;
 
      // The page $arg can only contain an integer that's not 1. The first page
      // URL does not include page $arg
      if (isset($args[1]) && (!ctype_digit((string) $args[1]) || $args[1] == 1)) {
         $request->getDispatcher()->handle404();
         exit;
      }
 
      if (!$sectionPath || !$contextId) {
         $request->getDispatcher()->handle404();
         exit;
      }
 
      $sectionDao = DAORegistry::getDAO('SectionDAO');
      $sections = $sectionDao->getByContextId($contextId);
 
      $sectionExists = false;
      while ($section = $sections->next()) {
         if ($section->getData('browseByEnabled') && $section->getData('browseByPath') === $sectionPath) {
            $sectionExists = true;
            break;
         }
      }
 
      if (!$sectionExists) {
         $request->getDispatcher()->handle404();
         exit;
      }
 
      $browseByPerPage = $section->getData('browseByPerPage');
      if (empty($browseByPerPage)) {
         $browseByPerPage = BROWSEBYSECTION_DEFAULT_PER_PAGE;
      }
 
      import('classes.submission.Submission'); // Import status constants
 
      $params = [
         'contextId' => $contextId,
         'count' => $browseByPerPage,
         'offset' => $page ? ($page - 1) * $browseByPerPage : 0,
         'orderBy' => 'datePublished',
         'sectionIds' => [(int) $section->getId()],
         'status' => STATUS_PUBLISHED,
      ];
 
      $submissionsIterator = Services::get('submission')->getMany($params);
      $total = Services::get('submission')->getMax($params);
 
      if ($page > 1 && !count($submissionsIterator)) {
         $request->getDispatcher()->handle404();
         exit;
      }
 
      $submissions = [];
      $issueIds = [];
      foreach ($submissionsIterator as $submission) {
         $submissions[] = $submission;
         if ($submission->getCurrentPublication()->getData('issueId')) {
            $issueIds[] = $submission->getCurrentPublication()->getData('issueId');
         }
      }
 
      $issuesIterator = Services::get('issue')->getMany([
         'contextId' => $contextId,
         'isPublished' => true,
         'issueIds' => array_unique($issueIds),
      ]);
      $issues = iterator_to_array($issuesIterator);
 
      $showingStart = $params['offset'] + 1;
      $showingEnd = min($params['offset'] + $params['count'], $params['offset'] + count($submissions));
      $nextPage = $total > $showingEnd ? $page + 1 : null;
      $prevPage = $showingStart > 1 ? $page - 1 : null;
 
      $templateMgr = TemplateManager::getManager($request);
      $templateMgr->assign(array(
         'section' => $section,
         'sectionPath' => $sectionPath,
         'sectionDescription' => $section->getLocalizedData('browseByDescription'),
         'articles' => $submissions,
         'issues' => $issues,
         'showingStart' => $showingStart,
         'showingEnd' => $showingEnd,
         'total' => $total,
         'nextPage' => $nextPage,
         'prevPage' => $prevPage,
      ));
 
      $plugin = PluginRegistry::getPlugin('generic', 'browsebysectionplugin');
 
      return $templateMgr->display($plugin->getTemplateResource('frontend/pages/section.tpl'));
   }
}