now files do presigned url setup

packages/objectstorage/src/client.ts

@@ -11,6 +11,7 @@ import {
 import type {
     FileMetadata,
     FileUploadConfig,
+    PresignedDownloadResult,
     PresignedUrlResult,
     UploadOptions,
     UploadResult,
@@ -266,6 +267,46 @@ export class R2StorageClient {
         }
     }
 
+    /**
+     * Generate presigned URL for private object download/view
+     */
+    async generatePresignedDownloadUrl(
+        objectKey: string,
+        expiresIn: number = 3600,
+    ): Promise<Result<PresignedDownloadResult>> {
+        try {
+            const command = new GetObjectCommand({
+                Bucket: this.config.bucketName,
+                Key: objectKey,
+            });
+
+            const downloadUrl = await getSignedUrl(this.s3Client, command, {
+                expiresIn,
+            });
+
+            logger.info(`Generated presigned download URL for ${objectKey}`);
+            return {
+                data: {
+                    downloadUrl,
+                    expiresIn,
+                },
+            };
+        } catch (error) {
+            logger.error("Failed to generate presigned download URL:", error);
+            return {
+                error: getError(
+                    {
+                        code: ERROR_CODES.STORAGE_ERROR,
+                        message: "Failed to generate presigned download URL",
+                        description: "Could not create download URL",
+                        detail: "S3 presigned URL generation failed",
+                    },
+                    error,
+                ),
+            };
+        }
+    }
+
     /**
      * Get file from R2
      */

packages/objectstorage/src/data.ts

@@ -60,6 +60,14 @@ export const presignedUrlResultSchema = v.object({
 });
 export type PresignedUrlResult = v.InferOutput<typeof presignedUrlResultSchema>;
 
+export const presignedDownloadResultSchema = v.object({
+    downloadUrl: v.string(),
+    expiresIn: v.pipe(v.number(), v.integer()),
+});
+export type PresignedDownloadResult = v.InferOutput<
+    typeof presignedDownloadResultSchema
+>;
+
 // File Validation Result Schema
 export const fileValidationResultSchema = v.object({
     isValid: v.boolean(),