Storage System (#92)

First idea of the storage system

Reviewed-on: #92
Co-authored-by: Bartha Maxime <231026@umons.ac.be>
Co-committed-by: Bartha Maxime <231026@umons.ac.be>

backend/src/main/java/ovh/herisson/Clyde/Services/StorageService.java

@@ -0,0 +1,56 @@
+package ovh.herisson.Clyde.Services;
+
+import org.springframework.core.io.UrlResource;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+import ovh.herisson.Clyde.Repositories.FileRepository;
+import ovh.herisson.Clyde.Tables.FileType;
+import ovh.herisson.Clyde.Tables.StorageFile;
+import java.io.IOException;
+import org.springframework.core.io.Resource;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+import java.util.Objects;
+import java.util.UUID;
+
+@Service
+public class StorageService {
+
+
+    private final Path rootLocation = Paths.get("cdn/");
+    private final FileRepository fileRepo;
+
+    public StorageService(FileRepository filerepo){
+        this.fileRepo = filerepo;
+    }
+
+
+    public String store(MultipartFile file, FileType fileType) {
+
+        if (file.getOriginalFilename().isEmpty()){return null;}
+
+        UUID uuid = UUID.randomUUID();
+        String stringUuid = uuid + "." + file.getOriginalFilename().split("\\.",2)[1];
+        try {
+            if (file.isEmpty()) {
+                return null;
+            }
+
+            Path destinationFile = this.rootLocation.resolve(Paths.get(stringUuid));
+
+            Files.copy(file.getInputStream(), destinationFile,StandardCopyOption.REPLACE_EXISTING);
+        }
+        catch (IOException e) {
+            return null;
+        }
+
+        String url = this.rootLocation.resolve(Paths.get(Objects.requireNonNull(stringUuid)))
+                .normalize().toString();
+
+        fileRepo.save(new StorageFile(file.getName(),url, fileType));
+
+        return url;
+    }
+}