imp: I-7969 share number cache per request

src/Entity/Share.php

@@ -606,20 +606,24 @@ EOF
     }
     if (!$this->getName()) {
       $sid = "share_number";
-      $previous_number = \Drupal::state()->get($sid);
-      if ($previous_number) {
-        $next_number = $previous_number + 1;
-      }
-      else {
+      $previous_data = \Drupal::state()->get($sid);
+      if (!is_array($previous_data) || $previous_data['ts'] != \Drupal::time()->getRequestTime()) {
         $connection = \Drupal::database();
-        $result = $connection->query("select max(convert(coalesce(name, 0), SIGNED INTEGER)) + 1 as maxid from {share}");
-        $next_number = $result->fetchObject()->maxid;
-        if (!$next_number) {
-          $next_number = 1;
+        $result = $connection->query("select max(convert(coalesce(name, 0), SIGNED INTEGER)) as maxid from {share}");
+        $last_number = $result->fetchObject()->maxid;
+        if (!$last_number) {
+          $last_number = 0;
         }
+          
+        $previous_data = [
+          'ts' => \Drupal::time()->getRequestTime(),
+          'number' => $last_number,
+        ];
       }
-      $this->setName($next_number);
-      \Drupal::state()->set($sid, $next_number);
+      $previous_data['number'] += 1;
+      \Drupal::state()->set($sid, $previous_data);
+      
+      $this->setName($previous_data['number']);
     }
 
     $transaction = $this->getIssuingTransaction();