feat(BE): fix delete project flock budget and uniformity, and fix uniformity with update purchase document

internal/common/service/common.document.service.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"mime"
 	"mime/multipart"
+	"net/url"
 	"path/filepath"
 	"strings"
 	"time"
@@ -305,6 +306,56 @@ func (s *documentService) PresignURL(ctx context.Context, document entity.Docume
 	return s.storage.PresignURL(ctx, document.Path, expires)
 }
 
+// ResolveDocumentURL normalizes a stored path or URL into a presigned URL.
+func ResolveDocumentURL(
+	ctx context.Context,
+	svc DocumentService,
+	rawPath string,
+	expires time.Duration,
+) (string, error) {
+	if svc == nil {
+		return "", nil
+	}
+
+	rawPath = strings.TrimSpace(rawPath)
+	if rawPath == "" {
+		return "", nil
+	}
+
+	key := rawPath
+	lower := strings.ToLower(rawPath)
+	if strings.HasPrefix(lower, "http://") || strings.HasPrefix(lower, "https://") {
+		key = extractS3KeyFromURL(rawPath)
+		if key == "" {
+			return "", nil
+		}
+	}
+
+	return svc.PresignURL(ctx, entity.Document{Path: key}, expires)
+}
+
+func extractS3KeyFromURL(raw string) string {
+	parsed, err := url.Parse(strings.TrimSpace(raw))
+	if err != nil {
+		return ""
+	}
+	path := strings.TrimPrefix(parsed.Path, "/")
+	if path == "" {
+		return ""
+	}
+
+	host := strings.ToLower(strings.TrimSpace(parsed.Host))
+	if strings.HasPrefix(host, "s3.") || strings.HasPrefix(host, "s3-") {
+		parts := strings.SplitN(path, "/", 2)
+		if len(parts) == 2 {
+			return parts[1]
+		}
+		return ""
+	}
+
+	return path
+}
+
 func (s *documentService) generateObjectKey(ext string) (string, error) {
 	normalizedExt := strings.TrimSpace(ext)
 	if normalizedExt != "" && !strings.HasPrefix(normalizedExt, ".") {