Added the API to get Pre-Signed Url by attachment ID

Marco.Pms.Services/Controllers/DocumentController.cs

@@ -327,7 +327,7 @@ namespace Marco.Pms.Services.Controllers
         }
 
         [HttpGet("list/versions/{parentAttachmentId}")]
-        public async Task<IActionResult> GetAllVersionsAsync(Guid parentAttachmentId)
+        public async Task<IActionResult> GetListAllVersionsAsync(Guid parentAttachmentId)
         {
             _logger.LogInfo("Start fetching document versions for ParentAttachmentId: {ParentAttachmentId}", parentAttachmentId);
 
@@ -379,6 +379,41 @@ namespace Marco.Pms.Services.Controllers
             }
         }
 
+        [HttpGet("get/version/{id}")]
+        public async Task<IActionResult> GetAllVersionsAsync(Guid id)
+        {
+            // API endpoint to get all versions of an attachment by its ID
+            _logger.LogInfo($"Fetching versions for attachment with ID: {id}");
+            await using var _context = await _dbContextFactory.CreateDbContextAsync();
+            // Create a new DbContext from the factory asynchronously
+            using var scope = _serviceScope.CreateScope();
+            // Create a new service scope for scoped services
+
+            var loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
+            // Get the currently logged in employee asynchronously
+
+            var versionMapping = await _context.AttachmentVersionMappings
+                // Retrieve version mapping including the child attachment and its document
+                .Include(av => av.ChildAttachment)
+                    .ThenInclude(da => da!.Document)
+                .FirstOrDefaultAsync(av => av.ChildAttachmentId == id);
+
+            if (versionMapping == null || versionMapping.ChildAttachment == null || versionMapping.ChildAttachment.Document == null)
+            // Return 404 if no version mapping or related entities found
+            {
+                _logger.LogWarning($"Version mapping not found for attachment ID: {id}");
+                return NotFound(ApiResponse<object>.ErrorResponse("Version not found", "Version not found in database", 404));
+            }
+
+            var s3Service = scope.ServiceProvider.GetRequiredService<S3UploadService>();
+            // Resolve S3UploadService from the scope to generate pre-signed URL
+            var preSignedUrl = s3Service.GeneratePreSignedUrl(versionMapping.ChildAttachment.Document.S3Key);
+            // Generate pre-signed URL for the document stored in S3
+            _logger.LogInfo($"Generated pre-signed URL for attachment ID: {id}");
+
+            return Ok(ApiResponse<object>.SuccessResponse(preSignedUrl, "Pre-Signed Url for old version fetched successfully", 200));
+            // Return the pre-signed URL with a success response
+        }
 
 
         /// <summary>