refactor(storage): optimize cloud drive storage service

- Replace manual validateFileSize() with maxSizeBytes in upload()
- Add upload hooks for structured logging
- Add deleteFiles() for bulk deletion via deleteMany()
- Add deleteAllUserFiles() for account deletion via deleteByPrefix()
- Remove unused validateFileSize import

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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

@@ -1,22 +1,29 @@
-import { Injectable } from '@nestjs/common';
+import { Injectable, Logger } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import {
 	createStorageStorage,
 	StorageClient,
 	generateUserFileKey,
 	getContentType,
-	validateFileSize,
 } from '@manacore/shared-storage';
 
 @Injectable()
 export class StorageService {
+	private readonly logger = new Logger(StorageService.name);
 	private storage: StorageClient;
 	private maxFileSize: number;
 
 	constructor(private configService: ConfigService) {
 		const publicUrl = this.configService.get<string>('STORAGE_S3_PUBLIC_URL');
 		this.storage = createStorageStorage(publicUrl);
-		this.maxFileSize = this.configService.get<number>('STORAGE_MAX_FILE_SIZE') || 100 * 1024 * 1024; // 100MB default
+		this.maxFileSize = this.configService.get<number>('STORAGE_MAX_FILE_SIZE') || 100 * 1024 * 1024;
+
+		this.storage.hooks.on('upload', ({ key, sizeBytes }) => {
+			this.logger.debug(`Uploaded ${key} (${sizeBytes} bytes)`);
+		});
+		this.storage.hooks.on('upload:error', ({ key, error }) => {
+			this.logger.error(`Upload failed for ${key}: ${error.message}`);
+		});
 	}
 
 	async uploadFile(
@@ -26,16 +33,11 @@ export class StorageService {
 		mimeType: string,
 		subfolder?: string
 	) {
-		if (!validateFileSize(buffer.length, this.maxFileSize / (1024 * 1024))) {
-			throw new Error(
-				`File size exceeds maximum allowed size of ${this.maxFileSize / (1024 * 1024)}MB`
-			);
-		}
-
 		const storageKey = generateUserFileKey(userId, originalName, subfolder);
 
 		const result = await this.storage.upload(storageKey, buffer, {
 			contentType: mimeType || getContentType(originalName),
+			maxSizeBytes: this.maxFileSize,
 		});
 
 		return {
@@ -54,6 +56,10 @@ export class StorageService {
 		await this.storage.delete(storageKey);
 	}
 
+	async deleteFiles(storageKeys: string[]): Promise<void> {
+		await this.storage.deleteMany(storageKeys);
+	}
+
 	async fileExists(storageKey: string): Promise<boolean> {
 		return this.storage.exists(storageKey);
 	}
@@ -69,4 +75,11 @@ export class StorageService {
 	getPublicUrl(storageKey: string): string | undefined {
 		return this.storage.getPublicUrl(storageKey);
 	}
+
+	/**
+	 * Delete all files for a user (account deletion).
+	 */
+	async deleteAllUserFiles(userId: string): Promise<number> {
+		return this.storage.deleteByPrefix(`users/${userId}/`);
+	}
 }