DevQuest 2025: InventoryMaster
🎯 Challenge Requirements
🔴 Challenge 01: Authentication Pipeline Failures
Category: Critical System Bugs
Test File: tests/challenge01.test.js
The Problem: The entire authentication system is broken. Users can’t log in, passwords aren’t hashed, and JWT tokens are missing.
Tasks to Complete:
- Challenge 1a: Authentication Foundation
- 1a-1: Basic product creation with required fields
- Focus: Password validation with complex requirements (8+ chars, uppercase, lowercase, number, special char)
- 1a-2: Product creation with all fields
- Focus: Password hashing validation and secure storage
- Challenge 1b: Token Management
- 1b-1: Product retrieval by ID
- Focus: JWT token generation, structure validation, and protected endpoint access
- 1b-2: Product listing with basic functionality
- Focus: Token payload verification and expiration handling
- 1b-3: Product update and delete operations
- Focus: Authentication integration with CRUD operations
Files: src/models/user.js, src/controller/authController.js, src/middleware/auth.js
🟠Challenge 02: Advanced Filtering and Sorting
Category: Core Feature Development
Test File: tests/challenge02.test.js
The Problem: Users can’t find products efficiently - need intelligent search and filtering.
Tasks to Complete:
- Challenge 2a: Product Filtering (Bug Fixes)
- 2a-1: Product filtering by category
- Requirements: Category-based filtering with multiple categories support
- 2a-2: Product filtering by price range
- Requirements: Min/max price validation, currency handling
- 2a-3: Product search functionality
- Requirements: Search by name, description, SKU with relevance ranking
- Challenge 2b: Advanced Sorting & Pagination (Bug Fixes + Features)
- 2b-1: Product sorting by different fields
- Requirements: Sort by name, price, stock, date - multiple directions (asc/desc)
- 2b-2: Pagination with sorting
- Requirements: Efficient pagination with maintained sort order
- 2b-3: Combined filtering and sorting
- Requirements: Multiple filters with sorting applied
Files: src/controller/productController.js, src/routes/productRoutes.js, src/repositories/productRepository.js
🟡 Challenge 03: User Authentication and Authorization
Category: Data Integrity & Business Logic
Test File: tests/challenge03.test.js
The Problem: Stock management lacks validation and business rules enforcement.
Tasks to Complete:
- Challenge 3a: Stock Management
- 3a-1: Advanced stock level validation
- Requirements: Stock operations with comprehensive validation rules
- 3a-2: Reorder level detection and alerts
- Requirements: Automated reorder detection with priority sorting
- 3a-3: Product lifecycle management
- Requirements: Active/inactive product states and visibility rules
- Challenge 3b: Data Consistency
- 3b-1: Concurrent stock update protection
- Requirements: Handle concurrent operations safely
- 3b-2: Data consistency validation
- Requirements: Prevent negative values and invalid states
- 3b-3: SKU uniqueness during updates
- Requirements: Case-insensitive SKU validation during updates
Files: src/controller/productController.js, src/models/product.js, src/repositories/productRepository.js
🔵 Challenge 04: API Validation and Error Handling
Category: Advanced Search & Discovery
Test File: tests/challenge04.test.js
The Problem: Search functionality is limited and doesn’t meet modern user expectations.
Tasks to Complete:
- Challenge 4a: Text Search Engine
- 4a-1: Basic text search functionality
- Requirements: Single-term search across multiple fields
- 4a-2: Advanced text search with multiple terms
- Requirements: Multi-term search with relevance scoring
- Challenge 4b: Advanced Filtering
- 4b-1: Category-based filtering
- Requirements: Multiple category selection and exclusion
- 4b-2: Price range filtering
- Requirements: Dynamic price range with validation
- 4b-3: Stock level filtering
- Requirements: Filter by stock status (in-stock, low-stock, out-of-stock)
- Challenge 4c: Combined Operations
- 4c-1: Combined search with category filtering
- Requirements: Search terms with category filtering
- 4c-2: Complex filtering combinations
- Requirements: Multiple filters with search terms
- Challenge 4d: Sorting and Pagination
- 4d-1: Sorting functionality
- Requirements: Sort by multiple fields with direction control
- 4d-2: Pagination functionality
- Requirements: Efficient pagination with maintained filters
Files: src/controller/productController.js, src/repositories/productRepository.js
🟢 Challenge 05: Real-time Dashboard
Category: Dashboard Analytics
Test File: tests/challenge05.test.js
The Problem: Dashboard lacks real-time insights and business intelligence.
Tasks to Complete:
- Challenge 5a: Dashboard Analytics
- 5a-1: Dashboard overview statistics
- Requirements: Total products, stock value, category breakdown
- 5a-2: Category breakdown analytics
- Requirements: Category-wise statistics and comparisons
- 5a-3: Stock level distribution
- Requirements: Stock level analysis and distribution charts
- Challenge 5b: Alert System
- 5b-1: Critical alerts generation
- Requirements: Low stock alerts, reorder notifications
- 5b-2: Alert acknowledgment and management
- Requirements: Alert status tracking and management
- Challenge 5c: Performance Metrics
- 5c-1: Dashboard data freshness
- Requirements: Real-time data updates and freshness indicators
- 5c-2: Performance metrics tracking
- Requirements: System performance monitoring
- Challenge 5d: Data Export and Reports
- 5d-1: Data export functionality
- Requirements: Export dashboard data in multiple formats
- 5d-2: Scheduled report generation
- Requirements: Automated report generation and delivery
Files: src/controller/productController.js, client/js/dashboard.js, client/dashboard.html
🟣 Challenge 06: Security Features
Category: Enterprise Security
Test File: tests/challenge06.test.js
The Problem: System lacks enterprise-grade security controls and compliance features.
Tasks to Complete:
- Challenge 6a: Authentication Security
- 6a-1: Multi-factor authentication setup
- Requirements: Security questions with complex business rules
- 6a-2: Password reset with additional security
- Requirements: Secure password reset with validation
- 6a-3: Session management and security
- Requirements: Session timeouts, concurrent session handling
- Challenge 6b: Access Control
- 6b-1: Role-based access control
- Requirements: Admin/User roles with permission matrix
- 6b-2: Resource ownership validation
- Requirements: Ensure users can only access their resources
- Challenge 6c: Data Protection
- 6c-1: Input sanitization and validation
- Requirements: XSS prevention, input sanitization
- 6c-2: Data encryption and secure storage
- Requirements: Encrypt sensitive data at rest
- Challenge 6d: Security Monitoring
- 6d-1: Audit logging and monitoring
- Requirements: Comprehensive audit trail implementation
- 6d-2: Intrusion detection and response
- Requirements: Detect and respond to security threats
- 6d-3: Security headers and HTTPS enforcement
- Requirements: Implement security headers and HTTPS
Files: src/middleware/auth.js, src/controller/authController.js, src/middleware/admin.js
Category: System Performance
Test File: tests/challenge07.test.js
The Problem: System doesn’t scale and has performance bottlenecks under load.
Tasks to Complete:
- Challenge 7a: Query Optimization
- 7a-1: Efficient pagination and sorting
- Requirements: Large dataset handling with efficient queries
- 7a-2: Search query optimization
- Requirements: Optimized full-text search performance
- 7a-3: Database indexing effectiveness
- Requirements: Strategic index creation and usage
- Challenge 7b: Response Optimization
- 7b-1: Response compression and caching
- Requirements: Gzip compression, response caching strategies
- 7b-2: Efficient data serialization
- Requirements: Optimized JSON responses
- Challenge 7c: Resource Management
- 7c-1: Memory usage optimization
- Requirements: Memory leak prevention, efficient object usage
- 7c-2: Connection pooling and resource cleanup
- Requirements: Database connection optimization
- Challenge 7d: Performance Testing
- 7d-1: Load testing and performance benchmarks
- Requirements: Performance benchmarking and load testing
- 7d-2: Rate limiting and throttling
- Requirements: API rate limiting and request throttling
Files: src/repositories/productRepository.js, src/middleware/pagination.js, db/migrations/
📊 Challenge 08: Data Analytics Engine
Category: Business Intelligence
Test File: tests/challenge08.test.js
The Problem: No advanced analytics or business intelligence capabilities.
Tasks to Complete:
- Challenge 8a: Analytics Foundation
- 8a-1: Multi-dimensional analytics aggregations
- Requirements: Complex data aggregations across multiple dimensions
- 8a-2: Custom metric calculations
- Requirements: Custom KPI calculations and business metrics
- 8a-3: Statistical analysis and correlations
- Requirements: Statistical analysis of inventory patterns
- Challenge 8b: Predictive Analytics
- 8b-1: Demand forecasting
- Requirements: Basic demand prediction algorithms
- 8b-2: Stock optimization recommendations
- Requirements: Optimal stock level recommendations
- 8b-3: Anomaly detection
- Requirements: Detect unusual patterns in inventory data
- Challenge 8c: Advanced Analytics
- 8c-1: Advanced KPI calculations
- Requirements: Complex business intelligence calculations
- 8c-2: Cohort analysis
- Requirements: Customer and product cohort analysis
- Challenge 8d: Real-time Analytics
- 8d-1: Streaming analytics processing
- Requirements: Real-time data stream processing
- 8d-2: Complex event processing
- Requirements: Event-driven analytics pipeline
Files: src/controller/reportController.js, src/routes/reportRoutes.js
🎨 Challenge 09: Advanced Frontend Interactions
Category: Frontend Excellence
Test File: tests/challenge09.test.js
The Problem: Frontend lacks modern UX features and interactive capabilities.
Tasks to Complete:
- Challenge 9a: Drag & Drop Interface
- 9a-1: Product drag and drop interface
- Requirements: Drag-and-drop product management with visual feedback
- 9a-2: Advanced drop zone interactions
- Requirements: Smart drop zones with validation
- Challenge 9b: State Management
- 9b-1: Complex state synchronization
- Requirements: Real-time state sync across components
- 9b-2: Real-time collaborative features
- Requirements: Multi-user collaboration features
- Challenge 9c: Advanced UI
- 9c-1: Context menu and shortcuts
- Requirements: Right-click menus, keyboard shortcuts
- 9c-2: Advanced selection and multi-select
- Requirements: Multi-selection with batch operations
- Challenge 9d: Performance UI
- 9d-1: Virtual scrolling and lazy loading
- Requirements: Efficient rendering for large datasets
- 9d-2: Animation and transition optimization
- Requirements: Smooth animations and transitions
Files: client/js/dashboard.js, client/dashboard.html, API endpoints for frontend interactions
🌟 Challenge 10: Frontend Validation and API Design
Category: Frontend & API Excellence
Test File: tests/challenge10.test.js
The Problem: Frontend has critical bugs and API lacks modern design patterns.
Tasks to Complete:
- Challenge 10a: Frontend Bug Fixes
- 10a-1: Fix form ID mismatches and input type bugs
- Requirements: Fix loginFormBroken → loginForm, email/password input types
- Files: client/login.html, client/signup.html, client/js/login.js
- 10a-2: Fix navigation and responsive design issues
- Requirements: Mobile toggle, navigation IDs, href corrections
- Files: client/index.html, responsive design fixes
- Challenge 10b: Advanced API Design
- 10b-1: Advanced RESTful endpoints
- Requirements: Resource collections, nested operations, bulk operations
- 10b-2: Content negotiation and versioning
- Requirements: Multiple content types, API versioning
- Challenge 10c: GraphQL Implementation
- 10c-1: GraphQL queries and mutations
- Requirements: Complex nested queries, fragments, mutations
- 10c-2: GraphQL advanced features
- Requirements: Subscriptions, introspection, security
- Challenge 10d: Microservices Architecture
- 10d-1: Service mesh and communication
- Requirements: Inter-service communication patterns
- 10d-2: Event-driven architecture
- Requirements: Event sourcing and CQRS patterns
- Challenge 10e: API Gateway
- 10e-1: Advanced API gateway features
- Requirements: API gateway with routing and transformation
- 10e-2: Advanced security and monitoring
- Requirements: API security and monitoring integration