feat(api): surface thumbnailAspect + pageCount on the Document type

Mirrors the backend entity additions so the frontend row components
can consume the aspect (portrait vs landscape tile) and the page count
(badge on the thumbnail) without any runtime guessing.

Refs #305

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/src/main/java/org/raddatz/familienarchiv/model/Document.java

@@ -50,6 +50,13 @@ public class Document {
     @Column(name = "thumbnail_generated_at")
     private LocalDateTime thumbnailGeneratedAt;
 
+    @Enumerated(EnumType.STRING)
+    @Column(name = "thumbnail_aspect", length = 16)
+    private ThumbnailAspect thumbnailAspect;
+
+    @Column(name = "page_count")
+    private Integer pageCount;
+
     // Originaler Dateiname beim Upload (z.B. "Brief_Oma_1940.pdf")
     @Column(name = "original_filename", nullable = false)
     @Schema(requiredMode = Schema.RequiredMode.REQUIRED)

backend/src/main/java/org/raddatz/familienarchiv/model/ThumbnailAspect.java

@@ -0,0 +1,6 @@
+package org.raddatz.familienarchiv.model;
+
+public enum ThumbnailAspect {
+    PORTRAIT,
+    LANDSCAPE
+}

backend/src/main/java/org/raddatz/familienarchiv/service/ThumbnailService.java

@@ -7,6 +7,7 @@ import org.apache.pdfbox.pdmodel.PDDocument;
 import org.apache.pdfbox.rendering.ImageType;
 import org.apache.pdfbox.rendering.PDFRenderer;
 import org.raddatz.familienarchiv.model.Document;
+import org.raddatz.familienarchiv.model.ThumbnailAspect;
 import org.raddatz.familienarchiv.repository.DocumentRepository;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
@@ -45,6 +46,9 @@ public class ThumbnailService {
     private static final int THUMBNAIL_WIDTH = 240;
     private static final float JPEG_QUALITY = 0.85f;
     private static final int PDF_RENDER_DPI = 100;
+    // Anything below this w/h ratio stays PORTRAIT — near-square A4 scans should
+    // render in the portrait tile rather than flipping to landscape at 1.01.
+    private static final float LANDSCAPE_THRESHOLD = 1.1f;
     private static final String PDF_CONTENT_TYPE = "application/pdf";
     private static final Set<String> IMAGE_CONTENT_TYPES =
             Set.of("image/jpeg", "image/png", "image/tiff");
@@ -82,27 +86,41 @@ public class ThumbnailService {
             return Outcome.SKIPPED;
         }
 
-        BufferedImage source = readSourceImage(doc, contentType);
-        if (source == null) return Outcome.FAILED;
+        SourcePreview preview = readSourcePreview(doc, contentType);
+        if (preview == null
+                || preview.image().getWidth() <= 0 || preview.image().getHeight() <= 0) {
+            log.warn("Thumbnail source has invalid dimensions for doc={}", doc.getId());
+            return Outcome.FAILED;
+        }
 
-        byte[] jpeg = encodeThumbnail(source, doc.getId());
+        byte[] jpeg = encodeThumbnail(preview.image(), doc.getId());
         if (jpeg == null) return Outcome.FAILED;
 
         String thumbnailKey = thumbnailKeyFor(doc.getId());
         if (!uploadToStorage(thumbnailKey, jpeg, doc.getId())) return Outcome.FAILED;
 
-        return persistThumbnailMetadata(doc, thumbnailKey);
+        ThumbnailAspect aspect = aspectOf(preview.image());
+        return persistThumbnailMetadata(doc, thumbnailKey, aspect, preview.pageCount());
     }
 
+    private static ThumbnailAspect aspectOf(BufferedImage source) {
+        float ratio = (float) source.getWidth() / source.getHeight();
+        return ratio > LANDSCAPE_THRESHOLD ? ThumbnailAspect.LANDSCAPE : ThumbnailAspect.PORTRAIT;
+    }
+
+    // First-page image + total page count for the source file. Page count is always
+    // 1 for image uploads; for PDFs it comes straight from PDDocument.
+    private record SourcePreview(BufferedImage image, int pageCount) {}
+
     private static String thumbnailKeyFor(UUID documentId) {
         return THUMBNAIL_KEY_PREFIX + documentId + THUMBNAIL_KEY_SUFFIX;
     }
 
-    private BufferedImage readSourceImage(Document doc, String contentType) {
+    private SourcePreview readSourcePreview(Document doc, String contentType) {
         try {
             return PDF_CONTENT_TYPE.equals(contentType)
                     ? renderPdfFirstPage(doc.getFilePath())
-                    : readImage(doc.getFilePath());
+                    : new SourcePreview(readImage(doc.getFilePath()), 1);
         } catch (Exception e) {
             log.warn("Thumbnail source read failed for doc={} reason={}",
                     doc.getId(), e.getMessage());
@@ -138,10 +156,13 @@ public class ThumbnailService {
         }
     }
 
-    private Outcome persistThumbnailMetadata(Document doc, String thumbnailKey) {
+    private Outcome persistThumbnailMetadata(Document doc, String thumbnailKey,
+                                             ThumbnailAspect aspect, int pageCount) {
         try {
             doc.setThumbnailKey(thumbnailKey);
             doc.setThumbnailGeneratedAt(LocalDateTime.now());
+            doc.setThumbnailAspect(aspect);
+            doc.setPageCount(pageCount);
             documentRepository.save(doc);
             return Outcome.SUCCESS;
         } catch (Exception e) {
@@ -160,11 +181,12 @@ public class ThumbnailService {
         return PDF_CONTENT_TYPE.equals(contentType) || IMAGE_CONTENT_TYPES.contains(contentType);
     }
 
-    private BufferedImage renderPdfFirstPage(String s3Key) throws IOException {
+    private SourcePreview renderPdfFirstPage(String s3Key) throws IOException {
         try (InputStream in = fileService.downloadFileStream(s3Key);
              PDDocument pdf = Loader.loadPDF(new RandomAccessReadBuffer(in))) {
             PDFRenderer renderer = new PDFRenderer(pdf);
-            return renderer.renderImageWithDPI(0, PDF_RENDER_DPI, ImageType.RGB);
+            BufferedImage image = renderer.renderImageWithDPI(0, PDF_RENDER_DPI, ImageType.RGB);
+            return new SourcePreview(image, pdf.getNumberOfPages());
         }
     }
 

backend/src/main/resources/db/migration/V53__add_thumbnail_aspect_and_page_count.sql

@@ -0,0 +1,8 @@
+-- Adds two nullable metadata columns populated by ThumbnailService when it
+-- generates the JPEG preview: thumbnail_aspect (PORTRAIT | LANDSCAPE, from the
+-- source image w/h ratio with threshold 1.1) and page_count (from PDDocument
+-- for PDFs, 1 for image uploads). Both are null until the existing admin
+-- backfill endpoint (/api/admin/generate-thumbnails) reruns the service.
+ALTER TABLE documents
+    ADD COLUMN thumbnail_aspect VARCHAR(16),
+    ADD COLUMN page_count INTEGER;

backend/src/test/java/org/raddatz/familienarchiv/repository/DocumentRepositoryTest.java

@@ -8,6 +8,7 @@ import org.raddatz.familienarchiv.model.DocumentAnnotation;
 import org.raddatz.familienarchiv.model.DocumentStatus;
 import org.raddatz.familienarchiv.model.Person;
 import org.raddatz.familienarchiv.model.Tag;
+import org.raddatz.familienarchiv.model.ThumbnailAspect;
 import org.raddatz.familienarchiv.model.TranscriptionBlock;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.jdbc.test.autoconfigure.AutoConfigureTestDatabase;
@@ -65,6 +66,40 @@ class DocumentRepositoryTest {
         assertThat(found.get().getStatus()).isEqualTo(DocumentStatus.PLACEHOLDER);
     }
 
+    // ─── thumbnailAspect + pageCount round-trip ───────────────────────────────
+
+    @Test
+    void save_persistsThumbnailAspectAndPageCount() {
+        Document document = Document.builder()
+                .title("Mit Aspekt")
+                .originalFilename("aspect.pdf")
+                .status(DocumentStatus.UPLOADED)
+                .thumbnailAspect(ThumbnailAspect.LANDSCAPE)
+                .pageCount(7)
+                .build();
+
+        Document saved = documentRepository.save(document);
+        Document found = documentRepository.findById(saved.getId()).orElseThrow();
+
+        assertThat(found.getThumbnailAspect()).isEqualTo(ThumbnailAspect.LANDSCAPE);
+        assertThat(found.getPageCount()).isEqualTo(7);
+    }
+
+    @Test
+    void save_thumbnailAspectAndPageCount_defaultToNull() {
+        Document document = Document.builder()
+                .title("Ohne Aspekt")
+                .originalFilename("no_aspect.pdf")
+                .status(DocumentStatus.PLACEHOLDER)
+                .build();
+
+        Document saved = documentRepository.save(document);
+        Document found = documentRepository.findById(saved.getId()).orElseThrow();
+
+        assertThat(found.getThumbnailAspect()).isNull();
+        assertThat(found.getPageCount()).isNull();
+    }
+
     // ─── findByStatus ─────────────────────────────────────────────────────────
 
     @Test

backend/src/test/java/org/raddatz/familienarchiv/repository/MigrationIntegrationTest.java

@@ -302,6 +302,51 @@ class MigrationIntegrationTest {
         ).isInstanceOf(DataIntegrityViolationException.class);
     }
 
+    // ─── V53: add thumbnail_aspect + page_count columns to documents ─────────
+
+    @Test
+    void v53_thumbnailAspectColumn_existsAndIsNullable() {
+        UUID docId = createDocument();
+
+        // Column must exist and accept NULL (freshly-created doc has no thumbnail yet)
+        String aspect = jdbc.queryForObject(
+                "SELECT thumbnail_aspect FROM documents WHERE id = ?", String.class, docId);
+        assertThat(aspect).isNull();
+    }
+
+    @Test
+    void v53_pageCountColumn_existsAndIsNullable() {
+        UUID docId = createDocument();
+
+        Integer pageCount = jdbc.queryForObject(
+                "SELECT page_count FROM documents WHERE id = ?", Integer.class, docId);
+        assertThat(pageCount).isNull();
+    }
+
+    @Test
+    void v53_thumbnailAspectColumn_acceptsPortraitAndLandscape() {
+        UUID docId = createDocument();
+
+        int portraitRows = jdbc.update(
+                "UPDATE documents SET thumbnail_aspect = 'PORTRAIT' WHERE id = ?", docId);
+        assertThat(portraitRows).isEqualTo(1);
+
+        int landscapeRows = jdbc.update(
+                "UPDATE documents SET thumbnail_aspect = 'LANDSCAPE' WHERE id = ?", docId);
+        assertThat(landscapeRows).isEqualTo(1);
+    }
+
+    @Test
+    void v53_pageCountColumn_storesInteger() {
+        UUID docId = createDocument();
+
+        jdbc.update("UPDATE documents SET page_count = 4 WHERE id = ?", docId);
+
+        Integer stored = jdbc.queryForObject(
+                "SELECT page_count FROM documents WHERE id = ?", Integer.class, docId);
+        assertThat(stored).isEqualTo(4);
+    }
+
     // ─── V51: backfill annotation_id on block comments and notifications ─────
 
     @Test

backend/src/test/java/org/raddatz/familienarchiv/service/ThumbnailServiceTest.java

@@ -11,6 +11,7 @@ import org.junit.jupiter.api.Test;
 import org.mockito.ArgumentCaptor;
 import org.raddatz.familienarchiv.model.Document;
 import org.raddatz.familienarchiv.model.DocumentStatus;
+import org.raddatz.familienarchiv.model.ThumbnailAspect;
 import org.raddatz.familienarchiv.repository.DocumentRepository;
 import org.springframework.test.util.ReflectionTestUtils;
 import software.amazon.awssdk.core.sync.RequestBody;
@@ -167,6 +168,116 @@ class ThumbnailServiceTest {
         verify(documentRepository, never()).save(any());
     }
 
+    @Test
+    void generate_persistsPageCount_ofOne_forSingleImageUpload() throws IOException {
+        // Image uploads are always a single page from the user's perspective.
+        Document doc = makeDoc("image/png", "documents/scan.png");
+        when(fileService.downloadFileStream(anyString()))
+                .thenReturn(new ByteArrayInputStream(createSamplePng(600, 800)));
+
+        ThumbnailService.Outcome outcome = thumbnailService.generate(doc);
+
+        assertThat(outcome).isEqualTo(ThumbnailService.Outcome.SUCCESS);
+        assertThat(doc.getPageCount()).isEqualTo(1);
+    }
+
+    @Test
+    void generate_persistsPageCount_fromPdfDocument() throws IOException {
+        Document doc = makeDoc("application/pdf", "documents/multi.pdf");
+        when(fileService.downloadFileStream(anyString()))
+                .thenReturn(new ByteArrayInputStream(createSamplePdf(3)));
+
+        ThumbnailService.Outcome outcome = thumbnailService.generate(doc);
+
+        assertThat(outcome).isEqualTo(ThumbnailService.Outcome.SUCCESS);
+        assertThat(doc.getPageCount()).isEqualTo(3);
+    }
+
+    @Test
+    void generate_persistsPortraitAspect_forTypicalPortraitSourceImage() throws IOException {
+        // 600x800 → ratio w/h = 0.75 → below 1.1 threshold → PORTRAIT.
+        Document doc = makeDoc("image/png", "documents/portrait.png");
+        when(fileService.downloadFileStream(anyString()))
+                .thenReturn(new ByteArrayInputStream(createSamplePng(600, 800)));
+
+        ThumbnailService.Outcome outcome = thumbnailService.generate(doc);
+
+        assertThat(outcome).isEqualTo(ThumbnailService.Outcome.SUCCESS);
+        assertThat(doc.getThumbnailAspect()).isEqualTo(ThumbnailAspect.PORTRAIT);
+    }
+
+    @Test
+    void generate_persistsLandscapeAspect_whenWidthIsWellAboveHeight() throws IOException {
+        // 800x400 → ratio 2.0 → clearly above 1.1 → LANDSCAPE.
+        Document doc = makeDoc("image/jpeg", "documents/wide.jpg");
+        when(fileService.downloadFileStream(anyString()))
+                .thenReturn(new ByteArrayInputStream(createSampleJpeg(800, 400)));
+
+        ThumbnailService.Outcome outcome = thumbnailService.generate(doc);
+
+        assertThat(outcome).isEqualTo(ThumbnailService.Outcome.SUCCESS);
+        assertThat(doc.getThumbnailAspect()).isEqualTo(ThumbnailAspect.LANDSCAPE);
+    }
+
+    @Test
+    void generate_persistsPortraitAspect_whenSquareImage_belowLandscapeThreshold() throws IOException {
+        // 500x500 → ratio 1.0 → below 1.1 threshold → PORTRAIT (A4 scans often
+        // come in at near-square and we want them to live in the portrait tile).
+        Document doc = makeDoc("image/png", "documents/square.png");
+        when(fileService.downloadFileStream(anyString()))
+                .thenReturn(new ByteArrayInputStream(createSamplePng(500, 500)));
+
+        ThumbnailService.Outcome outcome = thumbnailService.generate(doc);
+
+        assertThat(outcome).isEqualTo(ThumbnailService.Outcome.SUCCESS);
+        assertThat(doc.getThumbnailAspect()).isEqualTo(ThumbnailAspect.PORTRAIT);
+    }
+
+    @Test
+    void generate_persistsPortraitAspect_justUnderLandscapeThreshold() throws IOException {
+        // 1099x1000 → ratio 1.099 → just under 1.1 threshold → PORTRAIT.
+        Document doc = makeDoc("image/png", "documents/near_threshold.png");
+        when(fileService.downloadFileStream(anyString()))
+                .thenReturn(new ByteArrayInputStream(createSamplePng(1099, 1000)));
+
+        ThumbnailService.Outcome outcome = thumbnailService.generate(doc);
+
+        assertThat(outcome).isEqualTo(ThumbnailService.Outcome.SUCCESS);
+        assertThat(doc.getThumbnailAspect()).isEqualTo(ThumbnailAspect.PORTRAIT);
+    }
+
+    @Test
+    void generate_returnsFailed_whenImageBytesAreCorrupt() throws IOException {
+        // Truncated JPEG header — ImageIO returns null rather than throwing.
+        // Without the corrupt-image guard this would later NPE inside the aspect /
+        // dimension computation in scaleToWidth.
+        Document doc = makeDoc("image/jpeg", "documents/corrupt.jpg");
+        byte[] truncated = new byte[]{(byte) 0xFF, (byte) 0xD8, (byte) 0xFF, (byte) 0xE0};
+        when(fileService.downloadFileStream(anyString()))
+                .thenReturn(new ByteArrayInputStream(truncated));
+
+        ThumbnailService.Outcome outcome = thumbnailService.generate(doc);
+
+        assertThat(outcome).isEqualTo(ThumbnailService.Outcome.FAILED);
+        verifyNoInteractions(s3Client);
+        verify(documentRepository, never()).save(any());
+    }
+
+    @Test
+    void generate_returnsFailed_whenPdfBytesAreCorrupt() throws IOException {
+        // "PDF" header but no body — PDFBox throws IOException while loading.
+        Document doc = makeDoc("application/pdf", "documents/corrupt.pdf");
+        byte[] fakePdf = "%PDF-1.4\n".getBytes();
+        when(fileService.downloadFileStream(anyString()))
+                .thenReturn(new ByteArrayInputStream(fakePdf));
+
+        ThumbnailService.Outcome outcome = thumbnailService.generate(doc);
+
+        assertThat(outcome).isEqualTo(ThumbnailService.Outcome.FAILED);
+        verifyNoInteractions(s3Client);
+        verify(documentRepository, never()).save(any());
+    }
+
     @Test
     void generate_returnsFailed_whenPersistThrows_butUploadSucceeded() throws IOException {
         // Covers the "orphan thumbnail" edge case: S3 upload succeeded but the
@@ -202,15 +313,21 @@ class ThumbnailServiceTest {
     }
 
     private static byte[] createSamplePdf() throws IOException {
+        return createSamplePdf(1);
+    }
+
+    private static byte[] createSamplePdf(int pageCount) throws IOException {
         try (PDDocument doc = new PDDocument()) {
-            PDPage page = new PDPage(PDRectangle.A4);
-            doc.addPage(page);
-            try (PDPageContentStream content = new PDPageContentStream(doc, page)) {
-                content.beginText();
-                content.setFont(new PDType1Font(Standard14Fonts.FontName.HELVETICA), 24);
-                content.newLineAtOffset(100, 700);
-                content.showText("Lieber Hans,");
-                content.endText();
+            for (int i = 0; i < pageCount; i++) {
+                PDPage page = new PDPage(PDRectangle.A4);
+                doc.addPage(page);
+                try (PDPageContentStream content = new PDPageContentStream(doc, page)) {
+                    content.beginText();
+                    content.setFont(new PDType1Font(Standard14Fonts.FontName.HELVETICA), 24);
+                    content.newLineAtOffset(100, 700);
+                    content.showText("Lieber Hans,");
+                    content.endText();
+                }
             }
             ByteArrayOutputStream bos = new ByteArrayOutputStream();
             doc.save(bos);

frontend/src/lib/generated/api.ts

@@ -1386,6 +1386,10 @@ export interface components {
             thumbnailKey?: string;
             /** Format: date-time */
             thumbnailGeneratedAt?: string;
+            /** @enum {string} */
+            thumbnailAspect?: "PORTRAIT" | "LANDSCAPE";
+            /** Format: int32 */
+            pageCount?: number;
             originalFilename: string;
             /** @enum {string} */
             status: "PLACEHOLDER" | "UPLOADED" | "TRANSCRIBED" | "REVIEWED" | "ARCHIVED";