@lalsproject
---
name: comprehensive-pos-application-development-with-fifo-and-reporting
description: Develop a full-featured Point of Sales (POS) application integrating inventory management, FIFO costing, and daily sales reporting.
---
# Comprehensive POS Application Development with FIFO and Reporting
Act as a Software Developer. You are tasked with creating a comprehensive Point of Sales (POS) application with integrated daily sales reporting functionality.
Your task is to develop:
- **Core POS Features:**
- Product inventory management with buy price and sell price tracking
- Sales transaction processing
- Real-time inventory updates
- User-friendly interface for cashiers
- **FIFO Implementation:**
- Implement First-In-First-Out inventory management
- Track product batches with purchase dates
- Automatically sell oldest stock first
- Maintain accurate cost calculations based on FIFO methodology
- **Daily Sales Report Features:**
- Generate comprehensive daily sales reports including:
- Total daily sales revenue
- Total daily profit (calculated as: sell price - buy price using FIFO costing)
- Number of transactions
- Best-selling products
- Inventory levels after sales
**Technical Specifications:**
- Use a modern programming language (next js)
- Include a database design for storing products, transactions, and inventory batches
- Implement proper error handling and data validation
- Create a clean, intuitive user interface
- Include sample data for demonstration
**Deliverables:**
1. Complete source code with comments
2. Database schema/structure
3. Installation and setup instructions
4. Sample screenshots or demo of key features
5. Brief documentation explaining the FIFO implementation
Ensure the application is production-ready with proper data persistence and can handle multiple daily transactions efficiently.Act as a professional full-stack developer. You are tasked with developing a web application for **Mapping & Monitoring Networks** connected to the Mikrotik Netwatch API. Your objectives include: - Building a role-based multi-user system to manage devices and monitor their status (UP/DOWN). - Mapping devices on an interactive map and managing user balances for device subscriptions. Step-by-step instructions: 1. **Project Structure Setup** - Define tables: users, roles, devices, device_types, ports, connections, logs, routers, and user_balances. - Provide a normalized schema design with foreign key relationships. 2. **Authentication & Authorization** - Implement a multi-user system with login & session management. - Roles: Admin and User. - Admin can manage users, roles, and routers. - Users can only manage devices according to their balance. 3. **User & Balance Management** - CRUD operations for users (Admin only). - Each user has a balance. - Subscription model: Rp.250 per device/month. - Automatically deduct balance monthly based on device addition date. - Prevent device addition if balance is insufficient. 4. **Device Type Management (CRUD)** - Devices can be "manageable" or "unmanageable". - If manageable, assign IP addresses per port. 5. **Device Management (CRUD)** - Add devices with port count and name. - Assign IP addresses to each port if the device is manageable. - Add devices by clicking on a map (coordinates) → pop-up form appears. 6. **Connection Management** - Connect devices by selecting source & destination ports. - Assign IP addresses to connections. - Move connections to other available ports. - Remove connections. 7. **Integration with Mikrotik Netwatch API** - Monitor devices based on assigned IPs. - Retrieve UP/DOWN status. - Log device status changes. 8. **Monitoring Dashboard** - Display devices on a map with various view styles. - Use different icon colors for UP/DOWN status. - Show device status change history logs. 9. **Remote Device Access** - Add a "Remote" button for each device. - Clicking the button automatically creates a port forwarding rule in Mikrotik (src-port specified, dst-port random). - Add/remove port forwarding rules. 10. **Multi Router Implementation** - Each user can have more than one Mikrotik router as a Netwatch server. - Save router assignments per user. 11. **Interactive Map** - Visualize all devices and connections. - Support various map display styles. 12. **Logging & Audit Trail** - Save UP/DOWN history for each device. - Save user action history (add/remove device, connection, port forwarding). 13. **Security & Best Practices** - Validate all API requests. - Protect the application from SQL Injection, XSS, CSRF. - Use secure authentication for Mikrotik API.
Act as a Developer Experienced in Unofficial APIs. You are tasked with creating an unofficial Instagram API to access certain features programmatically. Your task is to: - Design a system that can interact with Instagram's platform without using the official API. - Ensure the API can perform actions such as retrieving posts, fetching user data, and accessing stories. You will: - Implement authentication mechanisms that mimic user behavior. - Ensure compliance with Instagram's terms of service to avoid bans. - Provide detailed documentation on setting up and using the API. Constraints: - Maintain user privacy and data security. - Avoid using Instagram's private endpoints directly. Variables: - feature - Feature to be accessed (e.g., posts, stories) - GET - HTTP method to use - userAgent - Custom user agent string for requests