Added an API to get persigned url for provided document

Marco.Pms.Services/Controllers/ImageController.cs

@@ -272,5 +272,44 @@ namespace Marco.Pms.Services.Controllers
             return Ok(ApiResponse<object>.SuccessResponse(response, "Images for provided batchId fetched successfully", 200));
         }
 
+        [HttpGet("{documentId}")]
+        public async Task<IActionResult> GetImage(Guid documentId)
+        {
+            // Log the start of the image fetch process
+            _logger.LogInfo("GetImage called for DocumentId: {DocumentId}", documentId);
+
+            // Step 1: Get the currently logged-in employee (for future use like permission checks or auditing)
+            var loggedInEmployee = await _userHelper.GetCurrentEmployeeAsync();
+
+            // Step 2: Fetch the document from the database based on the provided ID
+            var document = await _context.Documents.FirstOrDefaultAsync(d => d.Id == documentId);
+
+            // Step 3: If document doesn't exist, return a 400 Bad Request response
+            if (document == null)
+            {
+                _logger.LogWarning("Document not found for DocumentId: {DocumentId}", documentId);
+                return BadRequest(ApiResponse<object>.ErrorResponse("Document not found", "Document not found", 400));
+            }
+
+            // Step 4: Generate pre-signed URLs for thumbnail and full image (if keys exist)
+            string? thumbnailUrl = document.ThumbS3Key != null
+                ? _s3Service.GeneratePreSignedUrlAsync(document.ThumbS3Key)
+                : null;
+
+            string? imageUrl = document.S3Key != null
+                ? _s3Service.GeneratePreSignedUrlAsync(document.S3Key)
+                : null;
+
+            // Step 5: Prepare the response object
+            var response = new
+            {
+                ThumbnailUrl = thumbnailUrl,
+                ImageUrl = imageUrl
+            };
+
+            // Step 6: Log successful fetch and return the result
+            _logger.LogInfo("Image fetched successfully for DocumentId: {DocumentId}", documentId);
+            return Ok(ApiResponse<object>.SuccessResponse(response, "Image fetched successfully", 200));
+        }
     }
 }