refs #15160 [fid_bbi] Whitelisting of mega_collection facet

fid_bbi/config/vufind/facets.ini

@@ -77,4 +77,33 @@ local_heading_facet_dezi4[] = "z";
 local_heading_facet_dezi4[] = "g";
 finc_class_facet[] = "not assigned"
 language[] = "not assigned"
-facet_avail[]   = "Non-free"
\ No newline at end of file
+facet_avail[]   = "Non-free"
+
+[AllowFacetValue]
+mega_collection[] = "Social Theory"
+mega_collection[] = "Springer Lecture Notes"
+mega_collection[] = "Torrossa / Monografie"
+mega_collection[] = "de Gruyter Online-Zeitschriften [Archiv]"
+mega_collection[] = "de Gruyter Online-Zeitschriften / Linguistics, Literature and Humanities"
+mega_collection[] = "Early English Books Online"
+mega_collection[] = "Eighteenth Century Collections Online / ECCO"
+mega_collection[] = "Gallica (BNF)"
+mega_collection[] = "Qucosa"
+mega_collection[] = "Hathi Trust"
+;mega_collection[] = "OLC SSG Informations-, Buch- und Bibliothekswesen"
+mega_collection[] = "Morgan & Claypool eBooks (CIS 5, 2013-2014)"
+mega_collection[] = "MedienwRezensionen"
+;mega_collection[] = "Torrossa / Periodici"
+;mega_collection[] = "Emerald Fulltext Archive Database -2014"
+;mega_collection[] = "Early Modern Pamphlets Online"
+;mega_collection[] = "BASE"
+;mega_collection[] = "TIB AV-Portal"
+;mega_collection[] = "Olms Online"
+
+; The following five mega_collections are all part of sid:159
+; but there is no mega_collection entry in SOLR for those
+;mega_collection[] = "Abendländische mittelalterliche Handschriften"
+;mega_collection[] = "Abendländische neuzeitliche Handschriften"
+;mega_collection[] = "Fragmente"
+;mega_collection[] = "Griechische Handschriften"
+;mega_collection[] = "Hebräische Handschriften"

module/fid_bbi/src/fid_bbi/Controller/SearchController.php

@@ -48,12 +48,25 @@ class SearchController extends BaseSearchController
      */
     public function sourcesAction()
     {
-        $facet = $this->params()->fromQuery('facet');
-        if (empty($facet)) {
-            $homepageFacet = key($this->getConfig('facets')->HomePage->toArray());
+        $homepageFacet = key($this->getConfig('facets')->HomePage->toArray());
+        if (empty($this->params()->fromQuery('facet'))) {
             return $this->redirect()->toRoute('search-sources',[],['query'=>['facet'=>$homepageFacet]]);
         }
         $view = $this->facetListAction();
+        $facetList = $view->data;
+
+        $whitelist = $this->getConfig('facets')->get('AllowFacetValue')->get($homepageFacet);
+        if (!empty($whitelist)) {
+            $whitelist = $whitelist->toArray();
+            $facetList
+                = array_filter(
+                $facetList,
+                function ($facet_info) use ($whitelist) {
+                    return in_array($facet_info['value'], $whitelist);
+                }
+            );
+        }
+        $view->setVariable('data', $facetList);
         $view->setTemplate('search/sources.phtml');
         return $view;
     }