add fileentity controller

# Conflicts:
#	src/main/java/ru/soune/nocopy/controller/AuthController.java
#	src/main/java/ru/soune/nocopy/controller/file/FileUploadController.java
#	src/main/java/ru/soune/nocopy/dto/AuthResponse.java
#	src/main/java/ru/soune/nocopy/dto/LoginResponse.java
#	src/main/java/ru/soune/nocopy/dto/RegisterRequest.java
#	src/main/java/ru/soune/nocopy/exception/UserAlreadyExistsException.java
#	src/main/java/ru/soune/nocopy/service/AuthService.java
#	src/test/java/ru/soune/nocopy/service/AuthServiceTest.java

src/main/java/ru/soune/nocopy/configuration/HandlerConfig.java

@@ -0,0 +1,28 @@
+package ru.soune.nocopy.configuration;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import ru.soune.nocopy.handler.*;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@Configuration
+public class HandlerConfig {
+
+    @Bean
+    public Map<Integer, RequestHandler> handlers(
+            RegRequestHandler reg,
+            LoginRequestHandler login,
+            FileUploadHandler upload,
+            FileEntityHandler file
+    ) {
+        Map<Integer, RequestHandler> map = new HashMap<>();
+        map.put(20001, login);
+        map.put(20002, reg);
+        map.put(20004, upload);
+        map.put(20005, file);
+
+        return map;
+    }
+}

src/main/java/ru/soune/nocopy/controller/ApiController.java

@@ -1,9 +1,7 @@
 package ru.soune.nocopy.controller;
 
-import jakarta.annotation.PostConstruct;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
-import org.springframework.context.ApplicationContext;
 import org.springframework.http.ResponseEntity;
 import org.springframework.validation.BindingResult;
 import org.springframework.validation.FieldError;
@@ -19,10 +17,7 @@ import ru.soune.nocopy.dto.file.UploadProgress;
 import ru.soune.nocopy.entity.file.UploadStatus;
 import ru.soune.nocopy.exception.NotValidFieldException;
 import ru.soune.nocopy.exception.ValidationException;
-import ru.soune.nocopy.handler.FileUploadHandler;
-import ru.soune.nocopy.handler.LoginRequestHandler;
-import ru.soune.nocopy.handler.RegRequestHandler;
-import ru.soune.nocopy.handler.RequestHandler;
+import ru.soune.nocopy.handler.*;
 import ru.soune.nocopy.service.file.FileUploadService;
 
 import java.util.HashMap;
@@ -35,21 +30,10 @@ import java.util.stream.Collectors;
 @RequestMapping("/api")
 @RequiredArgsConstructor
 public class ApiController {
-    private final ApplicationContext applicationContext;
     private final FileUploadService fileUploadService;
 
-    private Map<Integer, RequestHandler> handlers = new HashMap<>();
+    private final Map<Integer, RequestHandler> handlers;
 
-    @PostConstruct
-    public void init() {
-        RegRequestHandler regHandler = applicationContext.getBean(RegRequestHandler.class);
-        LoginRequestHandler loginHandler = applicationContext.getBean(LoginRequestHandler.class);
-        FileUploadHandler fileUploadHandler = applicationContext.getBean(FileUploadHandler.class);
-
-        handlers.put(20004, fileUploadHandler);
-        handlers.put(20002, regHandler);
-        handlers.put(20001, loginHandler);
-    }
 
     @PostMapping("/v{version}/data")
     public ResponseEntity<?> handlePostRequest(@RequestBody BaseRequest request,

src/main/java/ru/soune/nocopy/controller/file/FileDownloadController.java

@@ -0,0 +1,172 @@
+package ru.soune.nocopy.controller.file;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.UrlResource;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import ru.soune.nocopy.dto.file.FileEntityResponse;
+import ru.soune.nocopy.entity.AuthToken;
+import ru.soune.nocopy.exception.NotFoundAuthToken;
+import ru.soune.nocopy.repository.AuthTokenRepository;
+import ru.soune.nocopy.service.file.FileEntityService;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+@Slf4j
+@RestController
+@RequestMapping("/api/files")
+@RequiredArgsConstructor
+public class FileDownloadController {
+
+    private final FileEntityService fileEntityService;
+    private final AuthTokenRepository authTokenRepository;
+
+    /**
+     * Скачать файл по ID FileEntity
+     */
+    @GetMapping("/download/{fileId}")
+    public ResponseEntity<Resource> downloadFile(
+            @PathVariable String fileId,
+            @RequestHeader("Authorization") String tokenHeader) {
+
+        try {
+            Long userId = getUserIdFromToken(tokenHeader);
+            FileEntityResponse fileInfo = fileEntityService.getById(fileId);
+
+            if (!fileInfo.getUserId().equals(userId)) {
+                return ResponseEntity.status(403).build();
+            }
+
+            if (!fileInfo.isExistsOnDisk()) {
+                return ResponseEntity.status(404)
+                        .body(null);
+            }
+
+            Path filePath = Paths.get(fileInfo.getFilePath());
+            Resource resource = new UrlResource(filePath.toUri());
+
+            if (!resource.exists()) {
+                return ResponseEntity.status(404).build();
+            }
+
+            String contentType = determineContentType(filePath);
+
+            return ResponseEntity.ok()
+                    .contentType(MediaType.parseMediaType(contentType))
+                    .header(HttpHeaders.CONTENT_DISPOSITION,
+                            "attachment; filename=\"" + fileInfo.getOriginalFileName() + "\"")
+                    .header(HttpHeaders.CONTENT_LENGTH, String.valueOf(fileInfo.getFileSize()))
+                    .body(resource);
+
+        } catch (NotFoundAuthToken e) {
+            return ResponseEntity.status(401).build();
+        } catch (Exception e) {
+            log.error("Error downloading file", e);
+            return ResponseEntity.status(500).build();
+        }
+    }
+
+    /**
+     * Получить предпросмотр файла (если поддерживается)
+     */
+    @GetMapping("/preview/{fileId}")
+    public ResponseEntity<Resource> previewFile(
+            @PathVariable String fileId,
+            @RequestHeader("Authorization") String tokenHeader) {
+
+        try {
+            Long userId = getUserIdFromToken(tokenHeader);
+            FileEntityResponse fileInfo = fileEntityService.getById(fileId);
+
+            if (!fileInfo.getUserId().equals(userId)) {
+                return ResponseEntity.status(403).build();
+            }
+
+            if (!isPreviewSupported(fileInfo.getMimeType())) {
+                return ResponseEntity.status(415)
+                        .body(null);
+            }
+
+            Path filePath = Paths.get(fileInfo.getFilePath());
+            Resource resource = new UrlResource(filePath.toUri());
+
+            if (!resource.exists()) {
+                return ResponseEntity.status(404).build();
+            }
+
+            String contentType = determineContentType(filePath);
+
+            return ResponseEntity.ok()
+                    .contentType(MediaType.parseMediaType(contentType))
+                    .header(HttpHeaders.CONTENT_DISPOSITION,
+                            "inline; filename=\"" + fileInfo.getOriginalFileName() + "\"")
+                    .body(resource);
+
+        } catch (NotFoundAuthToken e) {
+            return ResponseEntity.status(401).build();
+        } catch (Exception e) {
+            log.error("Error previewing file", e);
+            return ResponseEntity.status(500).build();
+        }
+    }
+
+    /**
+     * Получить информацию о файле для фронтенда
+     */
+    @GetMapping("/info/{fileId}")
+    public ResponseEntity<FileEntityResponse> getFileInfo(
+            @PathVariable String fileId,
+            @RequestHeader("Authorization") String tokenHeader) {
+
+        try {
+            Long userId = getUserIdFromToken(tokenHeader);
+            FileEntityResponse fileInfo = fileEntityService.getById(fileId);
+
+            if (!fileInfo.getUserId().equals(userId)) {
+                return ResponseEntity.status(403).build();
+            }
+
+            return ResponseEntity.ok(fileInfo);
+
+        } catch (NotFoundAuthToken e) {
+            return ResponseEntity.status(401).build();
+        } catch (Exception e) {
+            log.error("Error getting file info", e);
+            return ResponseEntity.status(500).build();
+        }
+    }
+
+    private String determineContentType(Path filePath) throws IOException {
+        String contentType = Files.probeContentType(filePath);
+        if (contentType == null) {
+            contentType = "application/octet-stream";
+        }
+        return contentType;
+    }
+
+    private boolean isPreviewSupported(String mimeType) {
+        if (mimeType == null) {
+            return false;
+        }
+
+        return mimeType.startsWith("image/") ||
+                mimeType.startsWith("text/") ||
+                mimeType.equals("application/pdf") ||
+                mimeType.startsWith("video/") ||
+                mimeType.startsWith("audio/");
+    }
+
+    private Long getUserIdFromToken(String tokenHeader) {
+        String token = tokenHeader.replace("Bearer ", "");
+        AuthToken authToken = authTokenRepository.findByToken(token)
+                .orElseThrow(() -> new NotFoundAuthToken("Token not found"));
+        return authToken.getUser().getId();
+    }
+}

src/main/java/ru/soune/nocopy/controller/file/FileUploadController.java

@@ -1,65 +0,0 @@
-package ru.soune.nocopy.controller.file;
-
-import jakarta.validation.Valid;
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.springframework.http.HttpStatus;
-import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.*;
-import org.springframework.web.multipart.MultipartFile;
-import ru.soune.nocopy.dto.file.FileApiResponse;
-import ru.soune.nocopy.dto.file.InitUploadRequest;
-import ru.soune.nocopy.dto.file.UploadProgressResponse;
-import ru.soune.nocopy.entity.AuthToken;
-import ru.soune.nocopy.entity.file.FileType;
-import ru.soune.nocopy.entity.file.FileUploadSession;
-import ru.soune.nocopy.entity.file.UploadStatus;
-import ru.soune.nocopy.exception.FileUploadException;
-import ru.soune.nocopy.exception.NotFoundAuthToken;
-import ru.soune.nocopy.exception.UploadSessionNotFoundException;
-import ru.soune.nocopy.repository.AuthTokenRepository;
-import ru.soune.nocopy.repository.FileUploadSessionRepository;
-import ru.soune.nocopy.service.file.FileUploadService;
-
-import java.util.*;
-
-@Slf4j
-@RestController
-@RequestMapping("/api/files")
-@RequiredArgsConstructor
-public class FileUploadController {
-
-    private final FileUploadService fileUploadService;
-
-    @PostMapping("/chunk")
-    public ResponseEntity<FileApiResponse<UploadProgressResponse>> uploadChunk(
-            @RequestParam("uploadId") String uploadId,
-            @RequestParam("chunkNumber") Integer chunkNumber,
-            @RequestParam("chunk") MultipartFile chunk) {
-
-        log.info("Uploading chunk {} for session {}, file size: {} bytes",
-                chunkNumber, uploadId, chunk.getSize());
-
-        if (chunk.isEmpty()) {
-            return ResponseEntity.badRequest()
-                    .body(FileApiResponse.error("Chunk file is empty"));
-        }
-
-        if (uploadId == null || uploadId.isBlank()) {
-            return ResponseEntity.badRequest()
-                    .body(FileApiResponse.error("Upload ID is required"));
-        }
-
-        try {
-            UploadProgressResponse progress = fileUploadService.uploadChunk(
-                    uploadId, chunkNumber, chunk);
-
-            return ResponseEntity.ok(FileApiResponse.success(progress));
-
-        } catch (Exception e) {
-            log.error("Error uploading chunk", e);
-            return ResponseEntity.badRequest()
-                    .body(FileApiResponse.error(e.getMessage()));
-        }
-    }
-}

src/main/java/ru/soune/nocopy/dto/AuthResponse.java

@@ -0,0 +1,10 @@
+package ru.soune.nocopy.dto;
+
+import java.time.LocalDateTime;
+
+public record AuthResponse (
+        boolean success,
+        String message,
+        String token,
+        LocalDateTime expiresAt
+) {}

src/main/java/ru/soune/nocopy/dto/MessageCode.java

@@ -11,7 +11,8 @@ public enum MessageCode {
     INVALID_JSON_BODY(2, "Invalid fields in JSON object"),
     INCOMPLETE_UPLOAD(2, "Not load all chunks"),
     MSG_ID_NOT_FOUND(4, "Message id not found"),
-
+    FILE_ENTITY_ERROR(2, "File entity error"),
+    ACCESS_DENIED(2, "Access denied"),
     AUTH_EMAIL_NOT_FOUND(4, "Email not found"),
     FILE_NOT_FOUND(4, "File not found"),
     AUTH_PASSWORD_NOT_MATCHES(2, "Password does not match");

src/main/java/ru/soune/nocopy/dto/file/DeleteFileResponse.java

@@ -0,0 +1,19 @@
+package ru.soune.nocopy.dto.file;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class DeleteFileResponse {
+    @JsonProperty("file_id")
+    private String fileId;
+
+    @JsonProperty("message")
+    private String message;
+}

src/main/java/ru/soune/nocopy/dto/file/FileEntityRequest.java

@@ -0,0 +1,34 @@
+package ru.soune.nocopy.dto.file;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class FileEntityRequest {
+    @JsonProperty("action")
+    private String action;
+
+    @JsonProperty("file_id")
+    private String fileId;
+
+    @JsonProperty("upload_session_id")
+    private String uploadSessionId;
+
+    @JsonProperty("query")
+    private String query;
+
+    @JsonProperty("page")
+    private Integer page;
+
+    @JsonProperty("page_size")
+    private Integer pageSize;
+
+    @JsonProperty("token")
+    private String token;
+}

src/main/java/ru/soune/nocopy/dto/file/FileEntityResponse.java

@@ -0,0 +1,33 @@
+package ru.soune.nocopy.dto.file;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import ru.soune.nocopy.entity.file.FileStatus;
+
+import java.time.LocalDateTime;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class FileEntityResponse {
+
+    private String id;
+    private Long userId;
+    private String originalFileName;
+    private String storedFileName;
+    private String filePath;
+    private Long fileSize;
+    private String mimeType;
+    private String fileExtension;
+    private String checksum;
+    private String uploadSessionId;
+    private FileStatus status;
+    private LocalDateTime createdAt;
+    private LocalDateTime updatedAt;
+    private String formattedSize;
+    private String downloadUrl;
+    private boolean existsOnDisk;
+}

src/main/java/ru/soune/nocopy/dto/file/FileListResponse.java

@@ -0,0 +1,33 @@
+package ru.soune.nocopy.dto.file;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.List;
+
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class FileListResponse {
+    @JsonProperty("files")
+    private List<FileEntityResponse> files;
+
+    @JsonProperty("total_count")
+    private Integer totalCount;
+
+    @JsonProperty("total_size")
+    private Long totalSize;
+
+    @JsonProperty("formatted_total_size")
+    private String formattedTotalSize;
+
+    @JsonProperty("page")
+    private Integer page;
+
+    @JsonProperty("page_size")
+    private Integer pageSize;
+}

src/main/java/ru/soune/nocopy/dto/file/FileResponse.java

@@ -0,0 +1,22 @@
+package ru.soune.nocopy.dto.file;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.List;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class FileResponse {
+
+    private List<FileEntityResponse> files;
+    private int totalCount;
+    private long totalSize;
+    private String formattedTotalSize;
+    private int page;
+    private int pageSize;
+}

src/main/java/ru/soune/nocopy/dto/file/StorageUsageResponse.java

@@ -0,0 +1,22 @@
+package ru.soune.nocopy.dto.file;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class StorageUsageResponse {
+    @JsonProperty("user_id")
+    private Long userId;
+
+    @JsonProperty("storage_used")
+    private Long storageUsed;
+
+    @JsonProperty("formatted_storage_used")
+    private String formattedStorageUsed;
+}

src/main/java/ru/soune/nocopy/entity/file/FileEntity.java

@@ -0,0 +1,78 @@
+package ru.soune.nocopy.entity.file;
+
+import jakarta.persistence.*;
+import lombok.*;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+import java.time.LocalDateTime;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+@Entity
+@Table(name = "file_entities")
+@EntityListeners(AuditingEntityListener.class)
+public class FileEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.UUID)
+    private String id;
+
+    @Column(name = "user_id", nullable = false)
+    private Long userId;
+
+    @Column(name = "original_file_name", nullable = false)
+    private String originalFileName;
+
+    @Column(name = "stored_file_name", nullable = false)
+    private String storedFileName;
+
+    @Column(name = "file_path", nullable = false, unique = true)
+    private String filePath;
+
+    @Column(name = "file_size", nullable = false)
+    private Long fileSize;
+
+    @Column(name = "mime_type")
+    private String mimeType;
+
+    @Column(name = "file_extension")
+    private String fileExtension;
+
+    @Column(name = "checksum")
+    private String checksum;
+
+    @Column(name = "upload_session_id")
+    private String uploadSessionId;
+
+    @Enumerated(EnumType.STRING)
+    @Column(name = "status")
+    private FileStatus status;
+
+    @CreatedDate
+    @Column(name = "created_at", updatable = false)
+    private LocalDateTime createdAt;
+
+    @LastModifiedDate
+    @Column(name = "updated_at")
+    private LocalDateTime updatedAt;
+
+    @PrePersist
+    public void prePersist() {
+        if (this.status == null) {
+            this.status = FileStatus.ACTIVE;
+        }
+        if (this.createdAt == null) {
+            this.createdAt = LocalDateTime.now();
+        }
+        this.updatedAt = LocalDateTime.now();
+    }
+
+    @PreUpdate
+    public void preUpdate() {
+        this.updatedAt = LocalDateTime.now();
+    }
+}

src/main/java/ru/soune/nocopy/entity/file/FileStatus.java

@@ -0,0 +1,8 @@
+package ru.soune.nocopy.entity.file;
+
+public enum FileStatus {
+    ACTIVE,
+    DELETED,
+    PROCESSING,
+    ERROR
+}

src/main/java/ru/soune/nocopy/exception/FileEntityNotFoundException.java

@@ -0,0 +1,11 @@
+package ru.soune.nocopy.exception;
+
+public class FileEntityNotFoundException extends RuntimeException {
+    public FileEntityNotFoundException(String fileId) {
+        super("FileEntity not found with ID: " + fileId);
+    }
+
+    public FileEntityNotFoundException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

src/main/java/ru/soune/nocopy/handler/FileEntityHandler.java

@@ -0,0 +1,292 @@
+package ru.soune.nocopy.handler;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Component;
+import ru.soune.nocopy.dto.*;
+import ru.soune.nocopy.dto.file.*;
+import ru.soune.nocopy.entity.AuthToken;
+import ru.soune.nocopy.exception.NotFoundAuthToken;
+import ru.soune.nocopy.repository.AuthTokenRepository;
+import ru.soune.nocopy.service.file.FileEntityService;
+
+import java.util.Arrays;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class FileEntityHandler implements RequestHandler {
+
+    private final FileEntityService fileEntityService;
+    private final AuthTokenRepository authTokenRepository;
+    private final ObjectMapper objectMapper;
+
+    @Override
+    public BaseResponse handle(BaseRequest request) {
+        try {
+            FileEntityRequest fileRequest = objectMapper.convertValue(
+                    request.getMessageBody(), FileEntityRequest.class);
+
+            String action = fileRequest.getAction();
+
+            switch (action) {
+                case "get_file_info":
+                    return handleGetFileInfo(request, fileRequest);
+                case "get_file_by_session":
+                    return handleGetFileBySession(request, fileRequest);
+                case "get_user_files":
+                    return handleGetUserFiles(request, fileRequest);
+                case "search_files":
+                    return handleSearchFiles(request, fileRequest);
+                case "get_storage_usage":
+                    return handleGetStorageUsage(request, fileRequest);
+                case "delete_file":
+                    return handleDeleteFile(request, fileRequest);
+                default:
+                    ActionResponse response = ActionResponse.builder()
+                            .action(action)
+                            .availableActions(Arrays.asList(
+                                    "get_file_info", "get_file_by_session", "get_user_files",
+                                    "search_files", "get_storage_usage", "delete_file"))
+                            .build();
+
+                    return new BaseResponse(request.getMsgId(),
+                            MessageCode.INVALID_ACTION.getCode(),
+                            "Invalid action: " + action,
+                            response);
+            }
+        } catch (Exception e) {
+            log.error("Error in FileEntityHandler", e);
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.FILE_UPLOAD_ERROR.getCode(),
+                    "Handler error: " + e.getMessage(),
+                    null);
+        }
+    }
+
+    private BaseResponse handleGetFileInfo(BaseRequest request, FileEntityRequest fileRequest) {
+        try {
+            Long userId = getUserIdFromToken(fileRequest.getToken());
+            FileEntityResponse fileInfo = fileEntityService.getById(fileRequest.getFileId());
+
+            if (!fileInfo.getUserId().equals(userId)) {
+                return new BaseResponse(request.getMsgId(),
+                        MessageCode.ACCESS_DENIED.getCode(),
+                        "Access denied",
+                        null);
+            }
+
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.SUCCESS.getCode(),
+                    MessageCode.SUCCESS.getDescription(),
+                    fileInfo);
+
+        } catch (NotFoundAuthToken e) {
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.INVALID_TOKEN.getCode(),
+                    "Authentication required",
+                    null);
+        } catch (Exception e) {
+            log.error("Error getting file info", e);
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.FILE_UPLOAD_ERROR.getCode(),
+                    "Failed to get file info: " + e.getMessage(),
+                    null);
+        }
+    }
+
+    private BaseResponse handleGetFileBySession(BaseRequest request, FileEntityRequest fileRequest) {
+        try {
+            Long userId = getUserIdFromToken(fileRequest.getToken());
+            FileEntityResponse fileInfo = fileEntityService.getByUploadSessionId(fileRequest.getUploadSessionId());
+
+            if (!fileInfo.getUserId().equals(userId)) {
+                return new BaseResponse(request.getMsgId(),
+                        MessageCode.ACCESS_DENIED.getCode(),
+                        "Access denied",
+                        null);
+            }
+
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.SUCCESS.getCode(),
+                    MessageCode.SUCCESS.getDescription(),
+                    fileInfo);
+
+        } catch (NotFoundAuthToken e) {
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.INVALID_TOKEN.getCode(),
+                    "Authentication required",
+                    null);
+        } catch (Exception e) {
+            log.error("Error getting file by session", e);
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.FILE_UPLOAD_ERROR.getCode(),
+                    "Failed to get file: " + e.getMessage(),
+                    null);
+        }
+    }
+
+    private BaseResponse handleGetUserFiles(BaseRequest request, FileEntityRequest fileRequest) {
+        try {
+            Long userId = getUserIdFromToken(fileRequest.getToken());
+            int page = fileRequest.getPage() != null ? fileRequest.getPage() : 1;
+            int pageSize = fileRequest.getPageSize() != null ? fileRequest.getPageSize() : 20;
+
+            FileResponse files = fileEntityService.getUserFiles(userId, page, pageSize);
+
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.SUCCESS.getCode(),
+                    MessageCode.SUCCESS.getDescription(),
+                    files);
+
+        } catch (NotFoundAuthToken e) {
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.INVALID_TOKEN.getCode(),
+                    "Authentication required",
+                    null);
+        } catch (Exception e) {
+            log.error("Error getting user files", e);
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.FILE_UPLOAD_ERROR.getCode(),
+                    "Failed to get files: " + e.getMessage(),
+                    null);
+        }
+    }
+
+    private BaseResponse handleSearchFiles(BaseRequest request, FileEntityRequest fileRequest) {
+        try {
+            Long userId = getUserIdFromToken(fileRequest.getToken());
+            int page = fileRequest.getPage() != null ? fileRequest.getPage() : 1;
+            int pageSize = fileRequest.getPageSize() != null ? fileRequest.getPageSize() : 20;
+
+            if (fileRequest.getQuery() == null || fileRequest.getQuery().isBlank()) {
+                return handleGetUserFiles(request, fileRequest);
+            }
+
+            FileResponse allFiles = fileEntityService.getUserFiles(userId, 1, 1000);
+
+            var filteredFiles = allFiles.getFiles().stream()
+                    .filter(f -> f.getOriginalFileName().toLowerCase().contains(fileRequest.getQuery().toLowerCase()))
+                    .toList();
+
+            int start = (page - 1) * pageSize;
+            int end = Math.min(start + pageSize, filteredFiles.size());
+
+            FileListResponse response = FileListResponse.builder()
+                    .files(filteredFiles.subList(start, Math.min(end, filteredFiles.size())))
+                    .totalCount(filteredFiles.size())
+                    .totalSize(allFiles.getTotalSize())
+                    .formattedTotalSize(allFiles.getFormattedTotalSize())
+                    .page(page)
+                    .pageSize(pageSize)
+                    .build();
+
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.SUCCESS.getCode(),
+                    MessageCode.SUCCESS.getDescription(),
+                    response);
+
+        } catch (NotFoundAuthToken e) {
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.INVALID_TOKEN.getCode(),
+                    "Authentication required",
+                    null);
+        } catch (Exception e) {
+            log.error("Error searching files", e);
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.FILE_UPLOAD_ERROR.getCode(),
+                    "Failed to search files: " + e.getMessage(),
+                    null);
+        }
+    }
+
+    private BaseResponse handleGetStorageUsage(BaseRequest request, FileEntityRequest fileRequest) {
+        try {
+            Long userId = getUserIdFromToken(fileRequest.getToken());
+            long usage = fileEntityService.getUserStorageUsed(userId);
+
+            StorageUsageResponse response = StorageUsageResponse.builder()
+                    .userId(userId)
+                    .storageUsed(usage)
+                    .formattedStorageUsed(formatFileSize(usage))
+                    .build();
+
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.SUCCESS.getCode(),
+                    MessageCode.SUCCESS.getDescription(),
+                    response);
+
+        } catch (NotFoundAuthToken e) {
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.INVALID_TOKEN.getCode(),
+                    "Authentication required",
+                    null);
+        } catch (Exception e) {
+            log.error("Error getting storage usage", e);
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.FILE_UPLOAD_ERROR.getCode(),
+                    "Failed to get storage usage: " + e.getMessage(),
+                    null);
+        }
+    }
+
+    private BaseResponse handleDeleteFile(BaseRequest request, FileEntityRequest fileRequest) {
+        try {
+            Long userId = getUserIdFromToken(fileRequest.getToken());
+            FileEntityResponse fileInfo = fileEntityService.getById(fileRequest.getFileId());
+
+            if (!fileInfo.getUserId().equals(userId)) {
+                return new BaseResponse(request.getMsgId(),
+                        MessageCode.ACCESS_DENIED.getCode(),
+                        "Access denied",
+                        null);
+            }
+
+            fileEntityService.markAsDeleted(fileRequest.getFileId());
+
+            DeleteFileResponse response = DeleteFileResponse.builder()
+                    .fileId(fileRequest.getFileId())
+                    .message("File marked as deleted")
+                    .build();
+
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.SUCCESS.getCode(),
+                    "File marked as deleted",
+                    response);
+
+        } catch (NotFoundAuthToken e) {
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.INVALID_TOKEN.getCode(),
+                    "Authentication required",
+                    null);
+        } catch (Exception e) {
+            log.error("Error deleting file", e);
+            return new BaseResponse(request.getMsgId(),
+                    MessageCode.FILE_UPLOAD_ERROR.getCode(),
+                    "Failed to delete file: " + e.getMessage(),
+                    null);
+        }
+    }
+
+    private Long getUserIdFromToken(String token) {
+        if (token == null || token.isBlank()) {
+            throw new NotFoundAuthToken("Token is required");
+        }
+
+        if (token.startsWith("Bearer ")) {
+            token = token.replace("Bearer ", "");
+        }
+
+        AuthToken authToken = authTokenRepository.findByToken(token)
+                .orElseThrow(() -> new NotFoundAuthToken("Token not found"));
+        return authToken.getUser().getId();
+    }
+
+    private String formatFileSize(long size) {
+        if (size < 1024) return size + " B";
+        int exp = (int) (Math.log(size) / Math.log(1024));
+        String pre = "KMGTPE".charAt(exp-1) + "";
+        return String.format("%.1f %sB", size / Math.pow(1024, exp), pre);
+    }
+}

src/main/java/ru/soune/nocopy/repository/FileEntityRepository.java

@@ -0,0 +1,33 @@
+package ru.soune.nocopy.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+import ru.soune.nocopy.entity.file.FileEntity;
+import ru.soune.nocopy.entity.file.FileStatus;
+
+import java.util.List;
+import java.util.Optional;
+
+@Repository
+public interface FileEntityRepository extends JpaRepository<FileEntity, String> {
+
+    List<FileEntity> findByUserId(Long userId);
+
+    List<FileEntity> findByUserIdAndStatus(Long userId, FileStatus status);
+
+    Optional<FileEntity> findByFilePath(String filePath);
+
+    Optional<FileEntity> findByUploadSessionId(String uploadSessionId);
+
+    boolean existsByFilePath(String filePath);
+
+    @Query("SELECT SUM(f.fileSize) FROM FileEntity f WHERE f.userId = :userId AND f.status = 'ACTIVE'")
+    Long getTotalSizeByUserId(@Param("userId") Long userId);
+
+    @Query("SELECT f FROM FileEntity f WHERE f.userId = :userId AND f.originalFileName LIKE %:keyword%")
+    List<FileEntity> searchByFileName(@Param("userId") Long userId, @Param("keyword") String keyword);
+
+    long countByUserId(Long userId);
+}

src/main/java/ru/soune/nocopy/service/file/FileEntityService.java

@@ -0,0 +1,241 @@
+package ru.soune.nocopy.service.file;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import ru.soune.nocopy.dto.file.FileEntityResponse;
+import ru.soune.nocopy.dto.file.FileResponse;
+import ru.soune.nocopy.entity.file.FileEntity;
+import ru.soune.nocopy.entity.file.FileStatus;
+import ru.soune.nocopy.entity.file.FileUploadSession;
+import ru.soune.nocopy.exception.FileEntityNotFoundException;
+import ru.soune.nocopy.repository.FileEntityRepository;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class FileEntityService {
+
+    private final FileEntityRepository fileEntityRepository;
+
+    @Transactional
+    public FileEntity createFromUploadSession(FileUploadSession session, String checksum) {
+        log.info("Creating FileEntity for upload session: {}", session.getUploadId());
+
+        try {
+            Path filePath = Paths.get(session.getFilePath());
+
+            if (!Files.exists(filePath)) {
+                throw new IOException("File not found on disk: " + filePath);
+            }
+
+            long fileSize = Files.size(filePath);
+            String originalName = session.getFileName();
+            String extension = extractFileExtension(originalName);
+            String storedName = filePath.getFileName().toString();
+
+            FileEntity fileEntity = FileEntity.builder()
+                    .userId(session.getUserId())
+                    .originalFileName(originalName)
+                    .storedFileName(storedName)
+                    .filePath(session.getFilePath())
+                    .fileSize(fileSize)
+                    .mimeType(session.getFileType())
+                    .fileExtension(extension)
+                    .checksum(checksum)
+                    .uploadSessionId(session.getUploadId())
+                    .status(FileStatus.ACTIVE)
+                    .build();
+
+            FileEntity saved = fileEntityRepository.save(fileEntity);
+            log.info("FileEntity created successfully: {} (size: {} bytes)",
+                    saved.getId(), fileSize);
+
+            return saved;
+
+        } catch (IOException e) {
+            log.error("Failed to create FileEntity for session {}: {}",
+                    session.getUploadId(), e.getMessage(), e);
+            throw new RuntimeException("Failed to create file entity: " + e.getMessage(), e);
+        }
+    }
+
+
+    private String extractFileExtension(String fileName) {
+        int dotIndex = fileName.lastIndexOf('.');
+        if (dotIndex > 0 && dotIndex < fileName.length() - 1) {
+            return fileName.substring(dotIndex + 1).toLowerCase();
+        }
+        return "";
+    }
+
+    @Transactional(readOnly = true)
+    public FileEntityResponse getById(String fileId) {
+        FileEntity fileEntity = fileEntityRepository.findById(fileId)
+                .orElseThrow(() -> new FileEntityNotFoundException(fileId));
+
+        return convertToResponse(fileEntity);
+    }
+
+    @Transactional(readOnly = true)
+    public FileEntityResponse getByUploadSessionId(String uploadSessionId) {
+        FileEntity fileEntity = fileEntityRepository.findByUploadSessionId(uploadSessionId)
+                .orElseThrow(() -> new FileEntityNotFoundException(
+                        "Not found for upload session: " + uploadSessionId));
+
+        return convertToResponse(fileEntity);
+    }
+
+    @Transactional(readOnly = true)
+    public FileEntityResponse getByFilePath(String filePath) {
+        FileEntity fileEntity = fileEntityRepository.findByFilePath(filePath)
+                .orElseThrow(() -> new FileEntityNotFoundException("Path: " + filePath));
+
+        return convertToResponse(fileEntity);
+    }
+
+
+    @Transactional(readOnly = true)
+    public FileResponse getAllUserFiles(Long userId) {
+        List<FileEntity> fileEntities = fileEntityRepository.findByUserIdAndStatus(
+                userId, FileStatus.ACTIVE);
+
+        List<FileEntityResponse> files = fileEntities.stream()
+                .map(this::convertToResponse)
+                .collect(Collectors.toList());
+
+        long totalSize = fileEntities.stream()
+                .mapToLong(FileEntity::getFileSize)
+                .sum();
+
+        return FileResponse.builder()
+                .files(files)
+                .totalCount(files.size())
+                .totalSize(totalSize)
+                .formattedTotalSize(formatFileSize(totalSize))
+                .page(1)
+                .pageSize(files.size())
+                .build();
+    }
+
+
+    @Transactional(readOnly = true)
+    public FileResponse getUserFiles(Long userId, int page, int pageSize) {
+        List<FileEntity> allFiles = fileEntityRepository.findByUserIdAndStatus(
+                userId, FileStatus.ACTIVE);
+
+        int start = (page - 1) * pageSize;
+        int end = Math.min(start + pageSize, allFiles.size());
+
+        if (start >= allFiles.size()) {
+            return FileResponse.builder()
+                    .files(List.of())
+                    .totalCount(allFiles.size())
+                    .totalSize(0)
+                    .formattedTotalSize("0 B")
+                    .page(page)
+                    .pageSize(pageSize)
+                    .build();
+        }
+
+        List<FileEntity> pageFiles = allFiles.subList(start, end);
+
+        List<FileEntityResponse> files = pageFiles.stream()
+                .map(this::convertToResponse)
+                .collect(Collectors.toList());
+
+        long totalSize = allFiles.stream()
+                .mapToLong(FileEntity::getFileSize)
+                .sum();
+
+        return FileResponse.builder()
+                .files(files)
+                .totalCount(allFiles.size())
+                .totalSize(totalSize)
+                .formattedTotalSize(formatFileSize(totalSize))
+                .page(page)
+                .pageSize(pageSize)
+                .build();
+    }
+
+    @Transactional
+    public void markAsDeleted(String fileId) {
+        FileEntity fileEntity = fileEntityRepository.findById(fileId)
+                .orElseThrow(() -> new FileEntityNotFoundException(fileId));
+
+        fileEntity.setStatus(FileStatus.DELETED);
+        fileEntity.setUpdatedAt(LocalDateTime.now());
+        fileEntityRepository.save(fileEntity);
+
+        log.info("FileEntity marked as deleted: {}", fileId);
+    }
+
+    @Transactional(readOnly = true)
+    public long getUserStorageUsed(Long userId) {
+        Long totalSize = fileEntityRepository.getTotalSizeByUserId(userId);
+        return totalSize != null ? totalSize : 0L;
+    }
+
+    @Transactional(readOnly = true)
+    public List<FileEntityResponse> searchFiles(Long userId, String query) {
+        List<FileEntity> files = fileEntityRepository.searchByFileName(userId, query);
+
+        return files.stream()
+                .filter(f -> f.getStatus() == FileStatus.ACTIVE)
+                .map(this::convertToResponse)
+                .collect(Collectors.toList());
+    }
+
+    private boolean checkFileExistsOnDisk(String filePath) {
+        try {
+            return Files.exists(Paths.get(filePath));
+        } catch (Exception e) {
+            log.warn("Error checking file existence: {}", filePath, e);
+            return false;
+        }
+    }
+
+    private FileEntityResponse convertToResponse(FileEntity fileEntity) {
+        boolean existsOnDisk = checkFileExistsOnDisk(fileEntity.getFilePath());
+
+        return FileEntityResponse.builder()
+                .id(fileEntity.getId())
+                .userId(fileEntity.getUserId())
+                .originalFileName(fileEntity.getOriginalFileName())
+                .storedFileName(fileEntity.getStoredFileName())
+                .filePath(fileEntity.getFilePath())
+                .fileSize(fileEntity.getFileSize())
+                .mimeType(fileEntity.getMimeType())
+                .fileExtension(fileEntity.getFileExtension())
+                .checksum(fileEntity.getChecksum())
+                .uploadSessionId(fileEntity.getUploadSessionId())
+                .status(fileEntity.getStatus())
+                .createdAt(fileEntity.getCreatedAt())
+                .updatedAt(fileEntity.getUpdatedAt())
+                .formattedSize(formatFileSize(fileEntity.getFileSize()))
+                .downloadUrl("/api/files/download/" + fileEntity.getId())
+                .existsOnDisk(existsOnDisk)
+                .build();
+    }
+
+    private String formatFileSize(long size) {
+        if (size < 1024) {
+            return size + " B";
+        } else if (size < 1024 * 1024) {
+            return String.format("%.1f KB", size / 1024.0);
+        } else if (size < 1024 * 1024 * 1024) {
+            return String.format("%.1f MB", size / (1024.0 * 1024.0));
+        } else {
+            return String.format("%.1f GB", size / (1024.0 * 1024.0 * 1024.0));
+        }
+    }
+}

src/main/java/ru/soune/nocopy/service/file/FileUploadServiceImpl.java

@@ -3,6 +3,7 @@ package ru.soune.nocopy.service.file;
 import jakarta.annotation.PostConstruct;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.scheduling.annotation.Async;
 import org.springframework.stereotype.Service;
@@ -56,6 +57,9 @@ public class FileUploadServiceImpl implements FileUploadService {
 
     private Path storageRoot;
 
+    @Autowired
+    private FileEntityService fileEntityService;
+
     @PostConstruct
     public void init() {
         try {
@@ -328,14 +332,46 @@ public class FileUploadServiceImpl implements FileUploadService {
         }
     }
 
+//    private void assembleFile(FileUploadSession session) throws IOException {
+//        log.info("Starting file assembly for session: {} ({})",
+//                session.getUploadId(), session.getFileName());
+//
+//        Path finalFilePath = null;
+//
+//        try {
+//            finalFilePath = prepareFinalFile(session);
+//
+//            validateAllChunksExist(session);
+//
+//            mergeChunksToFile(session, finalFilePath);
+//
+//            validateFinalFile(session, finalFilePath);
+//
+//            updateSessionOnSuccess(session, finalFilePath);
+//
+//            cleanupSessionFiles(session);
+//
+//            log.info("File assembly completed: {} -> {} ({} bytes)",
+//                    session.getFileName(), finalFilePath, session.getFileSize());
+//
+//        } catch (Exception e) {
+//            if (finalFilePath != null) {
+//                Files.deleteIfExists(finalFilePath);
+//            }
+//            throw e;
+//        }
+//    }
+
     private void assembleFile(FileUploadSession session) throws IOException {
         log.info("Starting file assembly for session: {} ({})",
                 session.getUploadId(), session.getFileName());
 
         Path finalFilePath = null;
+        String checksum = null;
 
         try {
             finalFilePath = prepareFinalFile(session);
+            log.info("Final file path: {}", finalFilePath);
 
             validateAllChunksExist(session);
 
@@ -343,18 +379,48 @@ public class FileUploadServiceImpl implements FileUploadService {
 
             validateFinalFile(session, finalFilePath);
 
-            updateSessionOnSuccess(session, finalFilePath);
+            checksum = calculateChecksum(finalFilePath);
+            log.debug("File checksum calculated: {}", checksum);
+
+            session.setFilePath(finalFilePath.toString());
+            session.setChecksum(checksum);
+            session.setStatus(UploadStatus.COMPLETED);
+            session.setCompletedAt(LocalDateTime.now());
+            sessionRepository.save(session);
+            log.info("Upload session updated to COMPLETED: {}", session.getUploadId());
+
+            try {
+                fileEntityService.createFromUploadSession(session, checksum);
+                log.info("FileEntity successfully created for session: {}",
+                        session.getUploadId());
+            } catch (Exception e) {
+                log.error("Failed to create FileEntity for session {} (file uploaded, but metadata not saved): {}",
+                        session.getUploadId(), e.getMessage());
+            }
 
             cleanupSessionFiles(session);
 
-            log.info("File assembly completed: {} -> {} ({} bytes)",
+            log.info("File assembly completed successfully: {} -> {} ({} bytes)",
                     session.getFileName(), finalFilePath, session.getFileSize());
 
         } catch (Exception e) {
+            log.error("File assembly failed for session {}: {}",
+                    session.getUploadId(), e.getMessage(), e);
+
             if (finalFilePath != null) {
-                Files.deleteIfExists(finalFilePath);
+                try {
+                    Files.deleteIfExists(finalFilePath);
+                    log.debug("Cleaned up partial file: {}", finalFilePath);
+                } catch (IOException ioException) {
+                    log.warn("Failed to cleanup partial file: {}", finalFilePath, ioException);
+                }
             }
-            throw e;
+
+            session.setStatus(UploadStatus.FAILED);
+            session.setLastError(e.getMessage());
+            sessionRepository.save(session);
+
+            throw new IOException("File assembly failed: " + e.getMessage(), e);
         }
     }
 

src/main/resources/application.yaml

@@ -31,6 +31,13 @@ file:
     temp-ttl-hours: ${TEMP_TTL_HOURS:72}  # 3 дня
     session-expiry-hours: ${SESSION_EXPIRY_HOURS:24}
 
+security:
+  cors:
+    allowed-origins: "*"
+    allowed-methods: GET,POST,PUT,DELETE,OPTIONS
+    allowed-headers: "*"
+    allow-credentials: true
+
 server:
   port: ${SERVER_PORT:8080}