fix: extension de arquivo non persiste ao subir

gradox2/src/main/java/com/example/gradox2/persistence/entities/File.java

@@ -31,6 +31,10 @@ public class File {
 
     @Column(name = "object_key", nullable = false)
     private String objectKey;
+
+    @Column(name = "original_filename")
+    private String originalFilename;
+
     private String fileHash;
 
     @Column(name = "size_bytes")

gradox2/src/main/java/com/example/gradox2/persistence/entities/TempFile.java

@@ -28,6 +28,10 @@ public class TempFile {
 
     @Column(name = "object_key", nullable = false)
     private String objectKey;
+
+    @Column(name = "original_filename")
+    private String originalFilename;
+
     private String fileHash;
 
     @Column(name = "size_bytes")

gradox2/src/main/java/com/example/gradox2/service/implementation/FileProposalServiceImpl.java

@@ -86,12 +86,16 @@ public FileProposalResponse uploadFileProposal(UploadFileProposalRequest dto) {
 
         try {
             byte[] fileData = dto.getFile().getBytes();
-            String objectKey = s3StorageService.put(fileData);
+            String contentType = dto.getFile().getContentType();
+            String objectKey = contentType != null
+                    ? s3StorageService.put(fileData, contentType)
+                    : s3StorageService.put(fileData);
             TempFile tempFile = TempFile.builder()
                     .title(dto.getTitle())
                     .description(dto.getDescription())
                     .type(dto.getType())
                     .objectKey(objectKey)
+                    .originalFilename(dto.getFile().getOriginalFilename())
                     .fileHash(generateFileHash(fileData)) // Hash seguro
                     .sizeBytes((long) fileData.length)
                     .subject(subject)
@@ -180,8 +184,11 @@ public TempFile downloadFileFromProposal(Long id) {
 
     public FileDownloadResponse getFileDownloadLink(Long id) {
         TempFile tempFile = downloadFileFromProposal(id);
+        String filename = tempFile.getOriginalFilename() != null
+                ? tempFile.getOriginalFilename()
+                : tempFile.getTitle();
         String url = fileUrlSigner.presignedGetUrl(tempFile.getObjectKey(),
-                ContentDisposition.attachmentOf(tempFile.getTitle()));
+                ContentDisposition.attachmentOf(filename));
         return FileDownloadResponse.builder().url(url).build();
     }
 

gradox2/src/main/java/com/example/gradox2/service/implementation/FileServiceImpl.java

@@ -76,8 +76,11 @@ public FileDownloadResponse downloadFile(Long id) {
         file.incrementDownloadCount();
         fileRepository.save(file);
 
+        String filename = file.getOriginalFilename() != null
+                ? file.getOriginalFilename()
+                : file.getTitle();
         String url = fileUrlSigner.presignedGetUrl(file.getObjectKey(),
-                ContentDisposition.attachmentOf(file.getTitle()));
+                ContentDisposition.attachmentOf(filename));
         return FileDownloadResponse.builder().url(url).build();
     }
 

gradox2/src/main/java/com/example/gradox2/service/implementation/VoteServiceImpl.java

@@ -329,6 +329,7 @@ private void applyFileProposal(FileProposal fileProposal) {
                 .description(tempFile.getDescription())
                 .type(tempFile.getType())
                 .objectKey(tempFile.getObjectKey())
+                .originalFilename(tempFile.getOriginalFilename())
                 .fileHash(tempFile.getFileHash())
                 .sizeBytes(tempFile.getSizeBytes())
                 .uploader(tempFile.getUploader())

gradox2/src/main/resources/db/migration/V9__file_original_filename.sql

@@ -0,0 +1,6 @@
+-- V9: Persistir o nome de arquivo orixinal (con extensión) para descargas
+alter table if exists files
+    add column if not exists original_filename varchar(255);
+
+alter table if exists temp_files
+    add column if not exists original_filename varchar(255);