dev add cold storage

src/main/java/ru/soune/nocopy/service/file/cloud/CloudStorageService.java

@@ -23,8 +23,11 @@ import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URI;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
+import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.Map;
 import java.util.UUID;
 
 @Service
@@ -49,6 +52,9 @@ public class CloudStorageService {
     @Value("${yandex.cloud.bucket}")
     private String bucket;
 
+    @Value("${yandex.cloud.bucket-cold}")
+    private String bucketCold;
+
     public void saveFilesToStorage(String mimeType, String extension, String sendToCloudFilePath) {
         AwsCredentials credentials = AwsBasicCredentials.create(key, secretKey);
         S3Client s3Client = S3Client.builder()
@@ -77,6 +83,77 @@ public class CloudStorageService {
         }
     }
 
+    public Map<String, String> saveSplitPartsToColdStorage(Long userId, Path file1Path, Path file2Path) {
+        AwsCredentials credentials = AwsBasicCredentials.create(key, secretKey);
+        S3Client s3Client = S3Client.builder()
+                .httpClient(ApacheHttpClient.create())
+                .region(Region.of(region))
+                .endpointOverride(URI.create(s3endpoint))
+                .credentialsProvider(StaticCredentialsProvider.create(credentials))
+                .build();
+
+        String part1Key = uploadFileToBucket(s3Client, bucketCold, file1Path, userId, "1");
+        String part2Key = uploadFileToBucket(s3Client, bucketCold, file2Path, userId, "2");
+
+        try {
+            Files.deleteIfExists(file1Path);
+            Files.deleteIfExists(file2Path);
+            log.info("Deleted local split files for userId: {}", userId);
+        } catch (IOException e) {
+            log.error("Failed to delete local split files for userId: {}", userId, e);
+        }
+
+        return Map.of("part1", part1Key, "part2", part2Key);
+    }
+
+    public String downloadPartFromBucket(String bucket, String cloudKey) {
+        AwsCredentials credentials = AwsBasicCredentials.create(key, secretKey);
+        S3Client s3Client = S3Client.builder()
+                .httpClient(ApacheHttpClient.create())
+                .region(Region.of(region))
+                .endpointOverride(URI.create(s3endpoint))
+                .credentialsProvider(StaticCredentialsProvider.create(credentials))
+                .build();
+
+        try {
+            GetObjectRequest getObjectRequest = GetObjectRequest.builder()
+                    .bucket(bucket)
+                    .key(cloudKey)
+                    .build();
+
+            ResponseBytes<GetObjectResponse> objectBytes = s3Client.getObjectAsBytes(getObjectRequest);
+            String content = new String(objectBytes.asByteArray(), StandardCharsets.UTF_8);
+
+            log.info("Downloaded from cold bucket, key: {}, size: {} chars", cloudKey, content.length());
+            return content;
+
+        } catch (Exception e) {
+            log.error("Failed to download from cold bucket, key: {}", cloudKey, e);
+            throw new RuntimeException("Failed to download file from cold storage", e);
+        }
+    }
+
+    private String uploadFileToBucket(S3Client s3Client, String bucket, Path filePath, Long userId, String partSuffix) {
+        String cloudKey = String.format("passport/%d/part_%s.txt", userId, partSuffix);
+
+        try {
+            byte[] bytes = Files.readAllBytes(filePath);
+
+            PutObjectRequest putObjectRequest = PutObjectRequest.builder()
+                    .bucket(bucket)
+                    .key(cloudKey)
+                    .contentType("text/plain")
+                    .build();
+
+            s3Client.putObject(putObjectRequest, RequestBody.fromBytes(bytes));
+            log.info("Uploaded part {} to cold bucket, key: {}", partSuffix, cloudKey);
+            return cloudKey;
+        } catch (IOException e) {
+            log.error("Failed to read file for upload: {}", filePath, e);
+            throw new RuntimeException("Failed to upload split part to cold storage", e);
+        }
+    }
+
     public File readFileFromStorageByPath(String filePath) throws IOException {
         GetObjectRequest objectRequest = GetObjectRequest.builder()
                 .bucket(bucket)