Add file deletion method in storage service

Implemented a new method to delete files from the storage by checksum and extension. This method logs the deletion process and throws a NotFoundException if the file cannot be found. Updated dependencies to include 'rm' from 'node:fs/promises'.

apps/backend/src/app/storage/storage.service.ts

@@ -1,6 +1,6 @@
 import * as console from "node:console";
 import * as crypto from "node:crypto";
-import { readFile, writeFile } from "node:fs/promises";
+import { readFile, writeFile, rm } from "node:fs/promises";
 import { join } from "node:path";
 import {
 	BadRequestException,
@@ -263,4 +263,29 @@ export class StorageService {
 			throw err;
 		}
 	}
+
+	/**
+	 * Deletes a file from the storage.
+	 *
+	 * @param {string} checksum - The checksum of the file to delete.
+	 * @param {string} extension - The extension of the file to delete.
+	 * @param {boolean} isDocumentation - A flag indicating whether the file is a documentation file.
+	 * @return {Promise<void>} A promise that resolves when the file is successfully deleted.
+	 * @throws {NotFoundException} Throws an exception if the file cannot be found.
+	 */
+	public async delete(
+		checksum: string,
+		extension: string,
+		isDocumentation: boolean,
+	) {
+		try {
+      const fileName = `${isDocumentation ? "doc" : "file"}-${checksum}.${extension.toLowerCase()}`;
+      console.log(`Deleting file "${fileName}" from storage...`);
+      await rm(join(process.cwd(), "assets/", fileName));
+      console.log(`File "${fileName}" deleted successfully.`);
+    } catch (err) {
+      console.log("File not found.");
+      throw new NotFoundException(err);
+    }
+	}
 }