NCBACK-35 add worked logic for save protected files

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

@@ -55,7 +55,7 @@ public class CloudStorageService {
 
         String mimeTypeFromFile = mimeType.equals("document") ? "application" : mimeType;
         String contentType = mimeTypeFromFile + "/" + extension;
-        String filePath = "files/" + sendToCloudFilePath;
+        String filePath = "files" + sendToCloudFilePath;
 
         PutObjectRequest putObjectRequest = PutObjectRequest.builder()
                 .bucket(bucket)
@@ -75,7 +75,7 @@ public class CloudStorageService {
     public File readFileFromStorageByPath(String filePath) throws IOException {
         GetObjectRequest objectRequest = GetObjectRequest.builder()
                 .bucket(bucket)
-                .key("files/" + filePath)
+                .key("files" + filePath)
                 .build();
         AwsCredentials credentials = AwsBasicCredentials.create(key, secretKey);
 
@@ -94,4 +94,39 @@ public class CloudStorageService {
 
         return tempFile;
     }
+
+    public void deleteFileFromStorage(String filePath) {
+        if (filePath == null || filePath.isEmpty()) {
+            log.warn("Attempted to delete file with empty path");
+            return;
+        }
+
+        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 cloudKey = "files" + filePath;
+
+        try {
+            try {
+                s3Client.headObject(builder -> builder.bucket(bucket).key(cloudKey).build());
+            } catch (Exception e) {
+                log.warn("File does not exist in cloud storage: {}", cloudKey);
+                return;
+            }
+
+            s3Client.deleteObject(builder -> builder.bucket(bucket).key(cloudKey).build());
+
+            log.info("File successfully deleted from cloud storage: {}", cloudKey);
+
+        } catch (Exception e) {
+            log.error("Failed to delete file from cloud storage: {}", cloudKey, e);
+            throw new RuntimeException("Failed to delete file from cloud storage: " + cloudKey, e);
+        }
+    }
 }