1 files changed, 96 insertions, 0 deletions
diff --git a/lib/classes/librarysearch/resultparsers/SRULibraryResultParser.php b/lib/classes/librarysearch/resultparsers/SRULibraryResultParser.php
new file mode 100644
index 0000000..fed92f3
--- /dev/null
+++ b/lib/classes/librarysearch/resultparsers/SRULibraryResultParser.php
@@ -0,0 +1,96 @@
+<?php
+/**
+ * This file is part of Stud.IP.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * @author      Moritz Strohm <strohm@data-quest.de>
+ * @copyright   2020
+ * @license     http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
+ * @category    Stud.IP
+ * @since       4.6
+ */
+
+
+/**
+ * This is a LibraryResultParser implementation for catalogs that
+ * use SRU.
+ *
+ * @see LibraryResultParser
+ */
+class SRULibraryResultParser implements LibraryResultParser
+{
+    /**
+     * @see LibraryResultParser::readResultSet
+     */
+    public function readResultSet($data = '') : array
+    {
+
+        $dom = new \DOMDocument();
+        $dom->loadXML($data);
+
+        $record_schema = $dom->getElementsByTagName('recordSchema')[0];
+        if (!$record_schema) {
+            //The recordSchema element is missing.
+            //We cannot continue.
+            return [];
+        }
+        if (strpos($record_schema->textContent, 'marcxml') !== false) {
+            $parser = new MarcxmlLibraryResultParser();
+            $result_set = [];
+            $collection_nodes = $dom->getElementsByTagName('collection');
+            if ($collection_nodes->length < 1) {
+                $collection_nodes = $dom->getElementsByTagName('records');
+            }
+            if ($collection_nodes->length > 0) {
+                foreach ($collection_nodes as $collection) {
+                    if ($collection instanceof \DOMText) {
+                        //Nothing we can do with text nodes.
+                        continue;
+                    }
+                    foreach ($collection->getElementsByTagName('record') as $record) {
+                        $document = $parser->readResultNode($record);
+                        if ($document->getTitle()) {
+                            $result_set[] = $document;
+                        }
+                    }
+                }
+            }
+            return $result_set;
+        }
+        throw new RuntimeException('only recordSchema marcxml implemented');
+    }
+
+
+    /**
+     * @see LibraryResultParser::readRecord
+     */
+    public function readRecord($data = ''): LibraryDocument
+    {
+        $dom = new \DOMDocument();
+        @$dom->loadXML($data);
+        $record = $dom->getElementsByTagName('zs:record')[0];
+        if (!$record) {
+            //Wrong document type.
+            throw new Exception('Wrong document type!');
+        }
+
+        $record_schema = $record->getElementsByTagName('zs:recordSchema')[0];
+        if ($record_schema->textContent == 'marcxml') {
+            $record_node = $record->getElementsByTagName('record')[0];
+            if (!$record_node) {
+                throw new Exception('Invalid data!');
+            }
+            $parser = new MarcxmlLibraryResultParser();
+            $document = $parser->readResultNode($record);
+            if ($document->getTitle()) {
+                return $document;
+            }
+        }
+
+        throw new Exception('Could not read record');
+    }
+}