[BUGFIX] Fix regression for METS files without physical structure (kitodo#1417)

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Co-authored-by: Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>

Author: stweil

Classes/Common/MetsDocument.php

@@ -484,16 +484,19 @@ private function getThumbnail(string $id = '')
 
         $thumbnail = null;
 
-        while ($fileGrpThumb = array_shift($fileGrpsThumb)) {
-            if (empty($id)) {
-                $thumbnail = $this->physicalStructureInfo[$this->physicalStructure[1]]['files'][$fileGrpThumb] ?? null;
-            } else {
-                $parentId = $this->smLinks['l2p'][$id][0] ?? null;
-                $thumbnail = $this->physicalStructureInfo[$parentId]['files'][$fileGrpThumb] ?? null;
-            }
+        if (!empty($this->physicalStructure)) {
+            // There is a physical structure (no anchor or year mets).
+            while ($fileGrpThumb = array_shift($fileGrpsThumb)) {
+                if (empty($id)) {
+                    $thumbnail = $this->physicalStructureInfo[$this->physicalStructure[1]]['files'][$fileGrpThumb] ?? null;
+                } else {
+                    $parentId = $this->smLinks['l2p'][$id][0] ?? null;
+                    $thumbnail = $this->physicalStructureInfo[$parentId]['files'][$fileGrpThumb] ?? null;
+                }
 
-            if (!empty($thumbnail)) {
-                break;
+                if (!empty($thumbnail)) {
+                    break;
+                }
             }
         }
         return $thumbnail;

Classes/Controller/CalendarController.php

@@ -286,7 +286,7 @@ protected function getCalendarYear(array &$calendarData, array $calendarIssuesBy
                         $dayLinksText = [];
                         $dayLinkDiv = [];
                         $currentMonth = date('n', $currentDayTime);
-                        if (is_array($calendarIssuesByMonth[$currentMonth])) {
+                        if (array_key_exists($currentMonth, $calendarIssuesByMonth) && is_array($calendarIssuesByMonth[$currentMonth])) {
                             foreach ($calendarIssuesByMonth[$currentMonth] as $id => $day) {
                                 if ($id == date('j', $currentDayTime)) {
                                     $dayLinks = $id;
@@ -492,19 +492,21 @@ private function getIssuesFromTableOfContents(): Generator
         $toc = $this->document->getCurrentDocument()->tableOfContents;
 
         foreach ($toc[0]['children'] as $year) {
-            foreach ($year['children'] as $month) {
-                foreach ($month['children'] as $day) {
-                    foreach ($day['children'] as $issue) {
-                        $title = $issue['label'] ?: $issue['orderlabel'];
-                        if (strtotime($title) !== false) {
-                            $title = strftime('%x', strtotime($title));
-                        }
+            if (array_key_exists('children', $year)) {
+                foreach ($year['children'] as $month) {
+                    foreach ($month['children'] as $day) {
+                        foreach ($day['children'] as $issue) {
+                            $title = $issue['label'] ?: $issue['orderlabel'];
+                            if (strtotime($title) !== false) {
+                                $title = strftime('%x', strtotime($title));
+                            }
 
-                        yield [
-                            'uid' => $issue['points'],
-                            'title' => $title,
-                            'year' => $day['orderlabel'],
-                        ];
+                            yield [
+                                'uid' => $issue['points'],
+                                'title' => $title,
+                                'year' => $day['orderlabel'],
+                            ];
+                        }
                     }
                 }
             }

Classes/Controller/MetadataController.php

@@ -478,7 +478,7 @@ private function getMetadata(): array
         if ($this->settings['rootline'] < 2) {
             // Get current structure's @ID.
             $ids = [];
-            if (isset($this->requestData['page'])) {
+            if (!empty($this->currentDocument->physicalStructure) && isset($this->requestData['page'])) {
                 $page = $this->currentDocument->physicalStructure[$this->requestData['page']];
                 if (!empty($page) && !empty($this->currentDocument->smLinks['p2l'][$page])) {
                     foreach ($this->currentDocument->smLinks['p2l'][$page] as $logId) {