Display side recommendations with combined search

config/vufind/combined.ini

@@ -28,6 +28,11 @@
 ;                           specified recommendations will be loaded into the top
 ;                           area of the column. If set to false, recommendations
 ;                           will be suppressed (default).
+; include_recommendations_side = If set to true, standard 'side' recommendations
+;        will be displayed in the sidebar column. If set to an array of
+;        recommendation settings (as per searches.ini), the specified recommendations
+;        will be loaded into the side column. If set to false, side recommendations
+;        will be suppressed (default).
 ; filter = One or more filters to apply to search results displayed in the column.
 ;          Use multiple "filter[] = ..." lines if multiple filters are needed.
 ; hiddenFilter = One or more hidden filters to apply to search results displayed in

module/VuFind/src/VuFind/Controller/CombinedController.php

@@ -225,6 +225,15 @@ public function resultsAction()
         $settings = $this->serviceLocator->get(\VuFind\Config\PluginManager::class)
             ->get('config');
 
+        // Identify if any modules use include_recommendations_side
+        $anySideRecommendations = false;
+        foreach ($config as $subconfig) {
+            if ($subconfig['include_recommendations_side'] ?? false) {
+                $anySideRecommendations = true;
+                break;
+            }
+        }
+
         // Build view model:
         return $this->createViewModel(
             [
@@ -237,6 +246,7 @@ public function resultsAction()
                 'supportsCart' => $supportsCart,
                 'supportsCartOptions' => $supportsCartOptions,
                 'showBulkOptions' => $settings->Site->showBulkOptions ?? false,
+                'anySideRecommendations' => $anySideRecommendations,
             ]
         );
     }
@@ -325,15 +335,18 @@ protected function adjustQueryForSettings($settings, $searchType = null)
         // Override the search type:
         $query->type = $searchType;
 
-        // Always leave noresults active (useful for 0-hit searches) and
-        // side inactive (no room to display) but display or hide top based
-        // on include_recommendations setting.
-        if ($settings['include_recommendations'] ?? false) {
-            $query->noRecommend = 'side';
-            if (is_array($settings['include_recommendations'])) {
-                $query->recommendOverride
-                    = ['top' => $settings['include_recommendations']];
+        // Always leave noresults active (useful for 0-hit searches).
+        // Display or hide top based on include_recommendations setting.
+        // Display or hide top based on include_recommendations_side setting.
+        if (($settings['include_recommendations'] ?? false) || ($settings['include_recommendations_side'] ?? false)) {
+            $recommendOverride = [];
+            if (is_array($settings['include_recommendations'] ?? null)) {
+                $recommendOverride['top'] = $settings['include_recommendations'];
+            }
+            if (is_array($settings['include_recommendations_side'] ?? null)) {
+                $recommendOverride['side'] = $settings['include_recommendations_side'];
             }
+            $query->recommendOverride = $recommendOverride;
         } else {
             $query->noRecommend = 'top,side';
         }

module/VuFind/src/VuFind/Search/Combined/Options.php

@@ -81,6 +81,7 @@ public function getRecommendationSettings($handler = null)
         $recommend = [];
         $config = $this->configLoader->get('combined');
         foreach (['top', 'bottom'] as $location) {
+            // foreach (['top', 'bottom', 'side'] as $location) {
             if (isset($config->RecommendationModules->$location)) {
                 $recommend[$location]
                     = $config->RecommendationModules->$location->toArray();

themes/bootstrap3/templates/combined/results-list.phtml

@@ -68,6 +68,29 @@
       <?php foreach (($top = $results->getRecommendations('top')) as $current): ?>
         <?=$this->recommend($current)?>
       <?php endforeach; ?>
+      <?php foreach (($side = $results->getRecommendations('side')) as $current):
+        $recommendationClass = str_replace('\\', '_', $current::class);
+        $recommendationJs = <<<JS
+            function addRecommendation_$recommendationClass() {
+              const sidebar = document.getElementById('search-sidebar');
+              const recommendation = document.getElementById('recommendation__$recommendationClass');
+              sidebar.append(recommendation);
+              recommendation.style.display = 'inherit';
+            }
+
+            if (document.readyState != 'loading') {
+              addRecommendation_$recommendationClass();
+            }
+            else {
+              document.addEventListener('DOMContentLoaded', addRecommendation_$recommendationClass);
+            }
+            JS;
+        ?>
+        <?=$this->inlineScript(\Laminas\View\Helper\HeadScript::SCRIPT, $recommendationJs, 'SET')?>
+        <div id="recommendation__<?=$recommendationClass?>" style="display: none;">
+          <?=$this->recommend($current)?>
+        </div>
+      <?php endforeach; ?>
       <?=
         $this->context()->renderInContext(
             'search/controls/showing.phtml',

themes/bootstrap3/templates/combined/results.phtml

@@ -73,7 +73,21 @@
       'showBulkOptions' => $this->showBulkOptions,
     ];
   ?>
-  <?=$this->context($this)->renderInContext('combined/stack-' . $placement . '.phtml', $viewParams); ?>
+
+  <?php if ($anySideRecommendations ?? false): ?>
+    <div class="<?=$this->layoutClass('mainbody')?>">
+      <?=$this->context($this)->renderInContext('combined/stack-' . $placement . '.phtml', $viewParams); ?>
+    </div>
+
+    <div class="<?=$this->layoutClass('sidebar')?>" id="search-sidebar">
+      <?php /* foreach ($this->results->getRecommendations('side') as $index => $current): ?>
+        <?=$this->recommend($current, 'side', $index)?>
+      <?php endforeach; */ ?>
+    </div>
+  <?php else: ?>
+    <?=$this->context($this)->renderInContext('combined/stack-' . $placement . '.phtml', $viewParams); ?>
+  <?php endif; ?>
+
   <?php $recs = $combinedResults->getRecommendations('bottom'); ?>
   <?php if (!empty($recs)): ?>
     <div>