Use Solr everywhere to retrieve books

Lib/Search/BookSearch.php

@@ -86,4 +86,34 @@ class BookSearch
             'books' => $books,
         );
     }
+
+
+    /**
+     * Retrive books from Solr based on their code (NoticeNr).
+     *
+     * @param array $codes
+     * @param string $field the field to use for the search
+     * @return array Books information
+     * @throws WebException
+     */
+    public static function GetBooks(array $codes, $field = 'code') {
+        // it is faster to do multiple small request to Solr rather than one big so separate
+        // in chunks if we are above the limit. 15 was found by testing and seems to be a sweet spot
+        $limit = 15;
+        $count = count($codes);
+        if($count > $limit) {
+            $parts = array_chunk($codes, $limit);
+            $books = array();
+            foreach($parts as $p) {
+                $books = array_merge($books, self::GetBooks($p));
+            }
+            return $books;
+        }
+
+        $bs = new static();
+        $query = sprintf('%s:(%s)', $field, implode(' OR ', $codes));
+        $bs->addQuery($query, null, false);
+        $results = $bs->getResults(0, $count);
+        return $results['books'];
+    }
 }