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 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). Adding the same recommendation module to multiple sections is
+;         unsupported.
 ; 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 +225,17 @@ public function resultsAction()
         $settings = $this->serviceLocator->get(\VuFind\Config\PluginManager::class)
             ->get('config');
 
+        // Identify if any modules use include_recommendations_side.
+        $columnSideRecommendations = [];
+        $recommendationManager = $this->serviceLocator->get(\VuFind\Recommend\PluginManager::class);
+        foreach ($config as $subconfig) {
+            foreach ($subconfig['include_recommendations_side'] ?? [] as $recommendation) {
+                $recommendationModuleName = strtok($recommendation, ':');
+                $recommendationModule = $recommendationManager->get($recommendationModuleName);
+                $columnSideRecommendations[] = str_replace('\\', '_', $recommendationModule::class);
+            }
+        }
+
         // Build view model:
         return $this->createViewModel(
             [
@@ -237,6 +248,7 @@ public function resultsAction()
                 'supportsCart' => $supportsCart,
                 'supportsCartOptions' => $supportsCartOptions,
                 'showBulkOptions' => $settings->Site->showBulkOptions ?? false,
+                'columnSideRecommendations' => $columnSideRecommendations,
             ]
         );
     }
@@ -325,18 +337,23 @@ protected function adjustQueryForSettings($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 side based on include_recommendations_side setting.
+        $recommendOverride = [];
+        $noRecommend = [];
+        if (is_array($settings['include_recommendations'] ?? false)) {
+            $recommendOverride['top'] = $settings['include_recommendations'];
+        } else {
+            $noRecommend[] = 'top';
+        }
+        if (is_array($settings['include_recommendations_side'] ?? false)) {
+            $recommendOverride['side'] = $settings['include_recommendations_side'];
         } else {
-            $query->noRecommend = 'top,side';
+            $noRecommend[] = 'side';
         }
+        $query->recommendOverride = $recommendOverride;
+        $query->noRecommend = count($noRecommend) ? implode(',', $noRecommend) : false;
     }
 
     /**

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

@@ -68,6 +68,28 @@
       <?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 recommendationContainer = document.querySelector('#search-sidebar .recommendation_container__$recommendationClass');
+              const recommendation = document.getElementById('recommendation__$recommendationClass');
+              recommendationContainer.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 +73,23 @@
       'showBulkOptions' => $this->showBulkOptions,
     ];
   ?>
-  <?=$this->context($this)->renderInContext('combined/stack-' . $placement . '.phtml', $viewParams); ?>
+
+  <?php if (!empty($columnSideRecommendations)): ?>
+    <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 ($columnSideRecommendations as $columnSideRecommendation): ?>
+        <div class="recommendation_container__<?=$columnSideRecommendation?>">
+          <?php // Content is added via JS in results-list.phtml. ?>
+        </div>
+      <?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>