Implement Pretty Diagnostic; Error Handler

[Ze7111]

Description

We need to build an error handling system that presents errors in a clear, visually appealing block-based format. The system should support error chaining, allowing additional contextual errors to be attached to a primary error. This design will help developers quickly identify root causes, understand error context, and see suggestions for resolution.

Requirements

• Block-Based Structure:

  • Render errors in distinct, well-formatted blocks.
  • Each block should include a header, a primary error message, and optional sections for additional context such as code snippets, line/column details, and suggestions.

• Extendable Error Chains:

  • Support chaining of errors so that a primary error can be extended with additional related errors.
  • Display the error chain in a logical, hierarchical manner to emphasize the root cause and follow-up context.

• Visual Appeal and Clarity:

  • Ensure error messages are formatted for easy readability with proper spacing, alignment, and clear separation between sections.
  • Consider features such as color coding (if applicable) and structured formatting for different error components.

• Integration:

  • Integrate seamlessly with our existing logging and debugging systems.
  • Adaptable for different error types throughout the codebase.

• Extensibility:

  • Design the error handler to allow for future enhancements, such as additional metadata fields or new display formats.
  • Utilize a builder pattern (or similar approach) for constructing errors in a flexible manner.

• Documentation & Testing:

  • Provide comprehensive documentation on how to create, extend, and render errors.
  • Include thorough unit tests covering simple errors, chained errors, and various edge cases.

Implementation Steps

1. Design the Error Data Structure:

   • Define a core error type that includes:
     • A primary error message and optional error code.
     • A list or chain of extended errors.
     • Additional context such as file position, code spans, or suggestions.

2. Develop the Rendering Module:

   • Create a module to render errors in a block-based format.
   • Ensure the renderer can display multiple error blocks in a clear hierarchical structure.

3. Implement the Error Builder:

   • Create a builder or fluent interface to construct and extend error objects.
   • Allow for easy addition of contextual details and chained errors.

4. Integrate with Logging Systems:

   • Ensure the error handler works seamlessly with our current logging and debugging frameworks.
   • Validate that errors can be captured, extended, and displayed in real-world scenarios.

5. Documentation:

   • Write detailed documentation covering:
     • The structure and design of the error handler.
     • How to create, extend, and render errors.
     • Examples of usage in various contexts.

6. Testing:

   • Develop comprehensive unit tests covering:
     • Basic error creation and block rendering.
     • Chaining and extending errors with additional context.
     • Edge cases such as missing context or deep error chains.
   • Ensure that output remains clear and consistent across different scenarios.

Acceptance Criteria

• Errors are rendered in clear, block-based sections with distinct headers, messages, and additional context.
• The error handler supports chaining errors and displays the hierarchy in a user-friendly manner.
• The implementation integrates smoothly with our existing systems without regressions.
• Comprehensive documentation and unit tests are provided.
• The design is easily extensible for future enhancements and new requirements.