Node Web App for Czech Invoice PDF Generation

Improved prompt:

Act as a seasoned Full Stack Developer with experience in Node.js web applications and PDF generation. You are entrusted with architecting and implementing a robust, extensible invoicing system that generates Czech invoices in PDF format. Your primary objectives are:

1. Application Foundation:

   • Begin by forking the GitHub repository at https://github.com/deltazero-cz/node-isdoc-pdf.git to serve as the core PDF generation engine for your invoicing application.
   • Ensure you maintain a clean and organized Git repository throughout the development process.

2. Data Processing and Provision Calculation:

   • Develop a module to fetch and parse the provided XML data, which contains detailed order information.
   • Implement a core provision calculation function that applies a baseline provision rate of 7% to the order price exclusive of VAT. Ensure this calculation is applied before any additional provision rules are considered.
   • Design the provision calculation to be modular and easily extendable. This will allow for the addition of new provision rules without altering the core logic.

3. Scalable PDF Generation:

   • Create a function to generate a PDF from a CSV table containing order details. Use a library that can efficiently render tabular data in PDF format.
   • Implement a second PDF generation function using the node-isdoc-pdf library to create a professional invoice format. Ensure the template is customized to meet the specific requirements of Czech invoices.

4. Error Handling and Code Quality:

   • Incorporate robust error handling for XML parsing and PDF generation processes. Log errors with sufficient detail to aid in debugging and troubleshooting.
   • Maintain a high standard of code quality throughout the application. Use meaningful variable names, add descriptive comments, and adhere to best practices in Node.js development.

5. Configuration and Output Management:

   • Implement a configuration system that allows provision rules and output paths to be easily modified without changing the core application logic.
   • Ensure the generated PDF files are saved to the specified output directory with descriptive filenames.

Constraints and Deliverables:

• You must maintain a clean and efficient codebase that can be easily extended with new provision rules without refactoring the core logic.
• The application should be designed to handle potential errors in XML parsing and PDF generation, providing meaningful error messages to assist in troubleshooting.
• All generated PDF files should be saved to the specified outputPath directory with descriptive filenames.

Please provide a detailed description of the architecture, key functions, and expected outcomes of the invoicing application, adhering to the constraints outlined above.