Processwire Module: HelperAuthorTags

HelperAuthorTags.module

<?php


class HelperAuthorTags extends WireData implements Module
{


    public static function getModuleInfo()
    {
        return array(
            'title' => 'Helper Author Tags',
            'description' => 'Regenerate author tags on article save',
            'version' => 1,
            'singular' => true,
            'autoload' => true
        );
    }


    public function init()
    {
        $this->pages->addHookAfter("save", $this, "hookPageSave");
    }


    public function hookPageSave(HookEvent $event)
    {
        $page = $event->argumentsByName("page");
        /**
         * @var Pages $pages
         */
        $pages = wire('pages');
        if ($page->template == 'works-single') {
            /**
             * @var tpl_works_single $page
             */
            if (!($page->isChanged('workAuthors')
                || $page->isChanged('workTags')
                || $page->isChanged('workMedium'))) {
                return;
            }
            foreach ($page->workAuthors as $author) {
                /**
                 * @var tpl_authors_single $authorPage
                 */
                $authorPage = $pages->get("id=$author");

                // remove all tags first
                $authorPage->authorTags->removeAll();

                // get all relevant tags again
                $authorTags = new PageArray();
                $authorArticles = $pages->find("template=works-single, workAuthors=$author");
                foreach ($authorArticles as $article) {
                    $authorTags->import($article->workTags);
                }

                // sort tags by number of works
                $authorTags = $authorTags->sort('-numPages');

                // add tags to the author's page and save it
                $authorPage->authorTags = $authorTags;
                $authorPage->save('authorTags');

                // tell the user about it
                $this->message("Regenerated tag data for author $author->title");
            }
        }
    }
}