Mirror directory to CashCtrl server

[lasuk]

Adding functions mirror_directory() and list_files() to CashCtrlAPIClient, with a corresponding unit test. Those functions allow to recursively sync a local directory on the CashCtrl server, and to list remote files.

[lasuk]

No human around for review. Asking ChatGPT:

Click to show prompt

``` Review methods `mirror_directory()` and `list_files()`. Then review the corresponding unit tests in test_mirror_directory.py. Provide review in markdown format for download. ```

Code Review of mirror_directory() and list_files() Methods and Their Tests

Review of mirror_directory() Method

Code Clarity and Functionality

• Clarity: The method's docstring clearly explains its purpose and parameters, which is good practice.
• Parameter Types: Using str | Path for directory paths offers flexibility for different types of inputs.
• Error Handling: The method could benefit from more explicit error handling, particularly for file operations and API calls.
• Logging: Consider adding logging statements to help trace the flow and debug issues during file operations and API interactions.

Efficiency and Improvements

• DataFrame Operations: The method heavily relies on pandas for handling file paths and categories, which can be efficient for large datasets but might be overkill for simpler tasks.
• File Operations: Looping through DataFrames to perform file uploads could be optimized, possibly by batch operations if supported by the API.
• Category Handling: The method updates categories every time it runs, which might be optimized by checking if updates are necessary.

Review of list_files() Method

Code Clarity and Functionality

• Simplicity: The method is straightforward and utilizes pandas effectively to format and merge data.
• Data Handling: Converting timestamps and merging category data are done efficiently, though it assumes all necessary fields are always present in the API response.

Suggestions for Improvement

• Error Handling: Add checks to ensure that the API response includes all expected fields to avoid potential key errors.
• Performance: If the file list is large, consider implementing pagination or filtering at the API level to handle data more efficiently.

Review of Unit Tests

Test Coverage and Design

• Comprehensive: The tests cover a wide range of scenarios, including adding, modifying, and deleting files.
• Use of Fixtures: The use of a mock_directory fixture is a good practice as it sets up a consistent test environment.

Specific Observations

• Test Isolation: Each test should ideally clean up after itself to ensure no state leakage between tests.
• Mocking: Consider mocking external dependencies (like API calls) to make tests faster and less prone to failures due to external changes.
• Assertions: The tests make good use of assertions to check conditions; however, adding more specific error messages would help identify issues quicker.

General Recommendations

• Refactoring: Consider breaking down mirror_directory() into smaller functions to improve readability and maintainability.
• Testing: Increase the robustness of tests by introducing mocks for API responses to test error handling.
• Documentation: Enhance method and test documentation to describe the logic and expected behaviors more comprehensively.

[lasuk]

Thanks ChatGPT, for your comments:

I find the following comments most pertinent:

• Logging would be helpful for debugging, adding the logging module is planned at a later stage.
• Pagination at the API level will most likely be necessary in the future.
• Batch operations for file upload would certainly improve update performance (but potentially will lead to pacing of API requests from the server side).

I declare the current state to be good enough for a first version and go ahead with merging :)