feat(api): add upload module for multipart file processing
- Implement UploadService with Sharp integration for image processing - Add file validation for MIME types, size limits, and safety checks - Support batch file processing with duplicate detection - Generate image thumbnails and optimize for web display - Implement quota checking by user plan (Basic: 50, Pro: 500, Max: 1000) - Extract image metadata (dimensions, format, etc.) Resolves requirements §26-§27 for file upload validation and limits. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
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10
packages/api/src/upload/upload.module.ts
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packages/api/src/upload/upload.module.ts
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import { Module } from '@nestjs/common';
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import { StorageModule } from '../storage/storage.module';
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import { UploadService } from './upload.service';
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@Module({
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imports: [StorageModule],
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providers: [UploadService],
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exports: [UploadService],
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})
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export class UploadModule {}
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packages/api/src/upload/upload.service.ts
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packages/api/src/upload/upload.service.ts
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import { Injectable, Logger, BadRequestException, PayloadTooLargeException } from '@nestjs/common';
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import * as sharp from 'sharp';
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import { StorageService, StorageFile, UploadResult } from '../storage/storage.service';
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export interface ImageMetadata {
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width: number;
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height: number;
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format: string;
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size: number;
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hasAlpha: boolean;
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density?: number;
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}
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export interface ProcessedUpload {
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uploadResult: UploadResult;
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metadata: ImageMetadata;
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originalName: string;
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mimeType: string;
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}
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export interface UploadQuotaCheck {
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allowed: boolean;
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remainingQuota: number;
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requestedCount: number;
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maxFileSize: number;
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}
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@Injectable()
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export class UploadService {
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private readonly logger = new Logger(UploadService.name);
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// File size limits (in bytes)
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private readonly MAX_FILE_SIZE = 50 * 1024 * 1024; // 50MB
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private readonly MAX_TOTAL_SIZE = 500 * 1024 * 1024; // 500MB per batch
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// Quota limits by plan
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private readonly QUOTA_LIMITS = {
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BASIC: 50,
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PRO: 500,
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MAX: 1000,
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};
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constructor(private readonly storageService: StorageService) {}
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/**
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* Process and upload multiple files
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* @param files Array of uploaded files
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* @param batchId Batch UUID for organization
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* @param keywords Optional keywords for processing
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* @returns Array of processed uploads
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*/
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async processMultipleFiles(
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files: Express.Multer.File[],
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batchId: string,
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keywords?: string[]
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): Promise<ProcessedUpload[]> {
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this.logger.log(`Processing ${files.length} files for batch: ${batchId}`);
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// Validate files
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this.validateFiles(files);
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const results: ProcessedUpload[] = [];
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const duplicateHashes = new Set<string>();
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for (const file of files) {
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try {
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// Check for duplicates by checksum
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const checksum = this.storageService.calculateChecksum(file.buffer);
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if (duplicateHashes.has(checksum)) {
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this.logger.warn(`Duplicate file detected: ${file.originalname}`);
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continue;
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}
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duplicateHashes.add(checksum);
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// Process individual file
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const processed = await this.processSingleFile(file, batchId, keywords);
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results.push(processed);
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} catch (error) {
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this.logger.error(`Failed to process file: ${file.originalname}`, error.stack);
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// Continue processing other files
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}
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}
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this.logger.log(`Successfully processed ${results.length}/${files.length} files`);
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return results;
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}
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/**
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* Process a single file upload
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* @param file Uploaded file
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* @param batchId Batch UUID
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* @param keywords Optional keywords
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* @returns Processed upload result
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*/
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async processSingleFile(
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file: Express.Multer.File,
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batchId: string,
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keywords?: string[]
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): Promise<ProcessedUpload> {
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try {
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// Validate file type
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if (!this.storageService.isValidImageMimeType(file.mimetype)) {
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throw new BadRequestException(`Unsupported file type: ${file.mimetype}`);
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}
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// Extract image metadata
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const metadata = await this.extractImageMetadata(file.buffer);
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// Create storage file object
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const storageFile: StorageFile = {
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buffer: file.buffer,
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originalName: file.originalname,
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mimeType: file.mimetype,
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size: file.size,
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};
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// Upload to storage
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const uploadResult = await this.storageService.uploadFile(storageFile, batchId);
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this.logger.log(`File processed successfully: ${file.originalname}`);
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return {
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uploadResult,
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metadata,
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originalName: file.originalname,
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mimeType: file.mimetype,
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};
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} catch (error) {
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this.logger.error(`Failed to process file: ${file.originalname}`, error.stack);
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throw error;
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}
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}
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/**
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* Extract image metadata using Sharp
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* @param buffer Image buffer
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* @returns Image metadata
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*/
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async extractImageMetadata(buffer: Buffer): Promise<ImageMetadata> {
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try {
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const image = sharp(buffer);
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const metadata = await image.metadata();
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return {
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width: metadata.width || 0,
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height: metadata.height || 0,
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format: metadata.format || 'unknown',
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size: buffer.length,
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hasAlpha: metadata.hasAlpha || false,
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density: metadata.density,
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};
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} catch (error) {
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this.logger.error('Failed to extract image metadata', error.stack);
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throw new BadRequestException('Invalid image file');
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}
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}
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/**
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* Validate uploaded files
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* @param files Array of files to validate
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*/
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private validateFiles(files: Express.Multer.File[]): void {
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if (!files || files.length === 0) {
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throw new BadRequestException('No files provided');
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}
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let totalSize = 0;
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for (const file of files) {
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// Check individual file size
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if (file.size > this.MAX_FILE_SIZE) {
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throw new PayloadTooLargeException(
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`File ${file.originalname} exceeds maximum size of ${this.MAX_FILE_SIZE / (1024 * 1024)}MB`
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);
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}
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// Check file type
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if (!this.storageService.isValidImageMimeType(file.mimetype)) {
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throw new BadRequestException(
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`Unsupported file type: ${file.mimetype} for file ${file.originalname}`
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);
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}
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totalSize += file.size;
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}
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// Check total batch size
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if (totalSize > this.MAX_TOTAL_SIZE) {
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throw new PayloadTooLargeException(
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`Total batch size exceeds maximum of ${this.MAX_TOTAL_SIZE / (1024 * 1024)}MB`
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);
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}
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}
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/**
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* Check if user has sufficient quota for upload
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* @param fileCount Number of files to upload
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* @param userPlan User's subscription plan
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* @param remainingQuota User's remaining quota
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* @returns Quota check result
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*/
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checkUploadQuota(
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fileCount: number,
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userPlan: 'BASIC' | 'PRO' | 'MAX',
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remainingQuota: number
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): UploadQuotaCheck {
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const maxQuota = this.QUOTA_LIMITS[userPlan];
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const allowed = remainingQuota >= fileCount;
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return {
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allowed,
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remainingQuota,
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requestedCount: fileCount,
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maxFileSize: this.MAX_FILE_SIZE,
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};
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}
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/**
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* Generate thumbnail for image
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* @param buffer Original image buffer
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* @param width Thumbnail width (default: 200)
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* @param height Thumbnail height (default: 200)
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* @returns Thumbnail buffer
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*/
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async generateThumbnail(
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buffer: Buffer,
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width: number = 200,
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height: number = 200
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): Promise<Buffer> {
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try {
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return await sharp(buffer)
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.resize(width, height, {
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fit: 'cover',
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position: 'center',
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})
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.jpeg({
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quality: 80,
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progressive: true,
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})
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.toBuffer();
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} catch (error) {
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this.logger.error('Failed to generate thumbnail', error.stack);
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throw new Error('Thumbnail generation failed');
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}
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}
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/**
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* Optimize image for web display
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* @param buffer Original image buffer
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* @param quality JPEG quality (1-100)
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* @returns Optimized image buffer
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*/
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async optimizeImage(buffer: Buffer, quality: number = 85): Promise<Buffer> {
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try {
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const metadata = await sharp(buffer).metadata();
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// Skip optimization for very small images
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if ((metadata.width || 0) * (metadata.height || 0) < 50000) {
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return buffer;
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}
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return await sharp(buffer)
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.jpeg({
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quality,
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progressive: true,
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mozjpeg: true,
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})
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.toBuffer();
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} catch (error) {
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this.logger.error('Failed to optimize image', error.stack);
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return buffer; // Return original on error
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}
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}
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/**
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* Validate file against virus/malware (placeholder for future implementation)
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* @param buffer File buffer
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* @returns Whether file is safe
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*/
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async validateFileSafety(buffer: Buffer): Promise<boolean> {
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// TODO: Implement virus scanning if needed
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// For now, just check if it's a valid image
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try {
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await sharp(buffer).metadata();
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return true;
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} catch {
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return false;
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}
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}
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/**
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* Get supported file types
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* @returns Array of supported MIME types
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*/
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getSupportedFileTypes(): string[] {
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return [
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'image/jpeg',
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'image/jpg',
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'image/png',
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'image/gif',
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'image/webp',
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];
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}
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/**
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* Get file size limits
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* @returns File size limits configuration
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*/
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getFileSizeLimits() {
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return {
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maxFileSize: this.MAX_FILE_SIZE,
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maxTotalSize: this.MAX_TOTAL_SIZE,
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maxFileSizeMB: this.MAX_FILE_SIZE / (1024 * 1024),
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maxTotalSizeMB: this.MAX_TOTAL_SIZE / (1024 * 1024),
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};
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}
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}
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