refs #15653 [fid] add SearchTabs

* expand Vufind SearchTab methods to get pure hidden filters in template
* handle emtpy filter

module/fid/src/Helper/SearchTabs.php

+<?php
+/**
+ * "Search tabs" view helper
+ *
+ * PHP version 7
+ *
+ * Copyright (C) Villanova University 2010.
+ * Copyright (C) The National Library of Finland 2015-2016.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * @category VuFind
+ * @package  View_Helpers
+ * @author   Robert Lange <lange@ub.uni-leipzig.de>
+ * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
+ * @link     https://vufind.org/wiki/development Wiki
+ */
+namespace fid\Helper;
+
+
+/**
+ * "Search tabs" view helper
+ *
+ * @category VuFind
+ * @package  View_Helpers
+ * @author   Robert Lange <lange@ub.uni-leipzig.de>
+ * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
+ * @link     https://vufind.org/wiki/development Wiki
+ */
+class SearchTabs extends \VuFind\View\Helper\Root\SearchTabs
+{
+    /**
+     * Create information representing a basic search tab.
+     *
+     * @param string $id             Tab ID
+     * @param string $class          Search class ID
+     * @param string $label          Display text for tab
+     * @param string $newUrl         Target search URL
+     * @param string $permissionName Name of a permissionrule
+     *
+     * @return array
+     */
+    protected function createBasicTab($id, $class, $label, $newUrl, $permissionName)
+    {
+        $retval = parent::createBasicTab($id, $class, $label, $newUrl, $permissionName);
+        $retval['hiddenFilters'] = $this->helper->getTabFilterConfig()[$id] ?? null;
+
+        return $retval;
+    }
+
+    /**
+     * Create information representing a selected tab.
+     *
+     * @param string $id             Tab ID
+     * @param string $class          Search class ID
+     * @param string $label          Display text for tab
+     * @param string $permissionName Name of a permissionrule
+     *
+     * @return array
+     */
+    protected function createSelectedTab($id, $class, $label, $permissionName)
+    {
+        $retval = parent::createSelectedTab($id, $class, $label, $permissionName);
+        $retval['hiddenFilters'] = $this->helper->getTabFilterConfig()[$id] ?? null;
+
+        return $retval;
+    }
+
+    /**
+     * Create information representing a tab linking to "search home."
+     *
+     * @param string $id             Tab ID
+     * @param string $class          Search class ID
+     * @param string $label          Display text for tab
+     * @param array  $filters        Tab filters
+     * @param string $permissionName Name of a permissionrule
+     *
+     * @return array
+     */
+    protected function createHomeTab($id, $class, $label, $filters, $permissionName)
+    {
+        $retval = parent::createHomeTab($id, $class, $label, $filters, $permissionName);
+        $retval['hiddenFilters'] = $this->helper->getTabFilterConfig()[$id] ?? null;
+
+        return $retval;
+    }
+}

themes/fid/theme.config.php

@@ -21,4 +21,12 @@
 
 return [
     'extends' => 'finc',
+    'helpers' => [
+        'factories' => [
+            'fid\Helper\SearchTabs' => 'VuFind\View\Helper\Root\SearchTabsFactory',
+        ],
+        'aliases' => [
+            'searchTabs' => 'fid\Helper\SearchTabs',
+        ]
+     ]
 ];
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