Resolve #3403561 "Support pinecone starterfree"

Closes #3403561

modules/pinecone/src/Plugin/search_api/backend/SearchApiPineconeBackend.php

@@ -48,7 +48,7 @@ class SearchApiPineconeBackend extends BackendPluginBase implements PluginFormIn
     $form['namespace'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Namespace'),
-      '#description' => $this->t('An optional override for the default namespace. The index ID will always be appended.'),
+      '#description' => $this->t('An optional override for the default namespace. The index ID will always be appended unless namespaces are disabled in the Pinecone configuration.'),
       '#default_value' => $this->configuration['namespace'],
       '#pattern' => '[a-zA-Z0-9_]*',
     ];
@@ -77,7 +77,13 @@ class SearchApiPineconeBackend extends BackendPluginBase implements PluginFormIn
     /** @var \Drupal\search_api\Item\ItemInterface $item */
     foreach ($items as $item) {
       // Delete the item as we are actually inserting multiple.
-      $this->deleteItems($index, [$item->getId()]);
+      try {
+        $this->deleteItems($index, [$item->getId()]);
+      }
+      catch (\Exception $exception) {
+        // Do nothing, Starter Pinecone does not allow deletion
+        // with filters.
+      }
 
       $itemBase = [
         'metadata' => [
@@ -126,7 +132,7 @@ class SearchApiPineconeBackend extends BackendPluginBase implements PluginFormIn
     $this->client->delete([
       'collection' => $this->getNamespace($index),
       'filter' => [
-        'item_id' => ['$in' => $item_ids],
+        'item_id' => ['$in' => array_values($item_ids)],
       ],
     ]);
   }
@@ -135,10 +141,16 @@ class SearchApiPineconeBackend extends BackendPluginBase implements PluginFormIn
    * {@inheritdoc}
    */
   public function deleteAllIndexItems(IndexInterface $index, $datasource_id = NULL) {
-    $this->client->delete([
-      'deleteAll' => TRUE,
-      'collection' => $this->getNamespace($index),
-    ]);
+    try {
+      $this->client->delete([
+        'deleteAll' => TRUE,
+        'collection' => $this->getNamespace($index),
+      ]);
+    }
+    catch (\Exception $exception) {
+      // Do nothing, Starter Pinecone does not allow deletion.
+      // The OpenAI module will let the user know what to do.
+    }
   }
 
   /**
@@ -189,6 +201,12 @@ class SearchApiPineconeBackend extends BackendPluginBase implements PluginFormIn
    *   The pinecone namespace.
    */
   public function getNamespace(IndexInterface $index): string {
+    // In the free version of pinecone, namespaces are not allowed.
+    if ($this->client->configuration['disable_namespace']) {
+      return '';
+    }
+
+    // In non-free version, set a default namespace if not set.
     return ($this->configuration['namespace'] ?? "searchapi:{$this->server->id()}") . ":{$index->id()}";
   }