Design tree navigation flow for user interactions (moving between nodes)

[c0d3sw0t]

Extracted from documentation: T3-InfoSec/t3-memassist#10

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What is the Problem or Limitation?

A core feature of the memorization assistant is the ability to move through a TKBA (Tree-Key-Based Algorithm) tree by interacting with its nodes. This interaction flow needs to be intuitive and responsive, ensuring that users can seamlessly navigate between nodes, make selections, and receive feedback based on their choices. Without a clear design for this flow, users may become confused about the navigation and how their actions impact memorization tracking and feedback.

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Describe the Solution You Would Like

The design of the tree navigation flow must ensure smooth interaction between the user and the TKBA tree, covering the following key aspects:

1. Node Navigation Logic

   • Implement forward and backward navigation between nodes. Users should be able to traverse multiple levels within the tree by choosing child nodes based on the displayed questions or options.

2. Handling Selections and Choices

   • When a user selects a node’s option, the correctness-check logic should immediately compare the chosen node's hash with the expected answer on the card.
   • If the selection is correct, the navigation will proceed to the next level. Otherwise, provide feedback and encourage the user to retry or score the incorrect selection.

3. User Interface (UI) and Feedback

   • Design intuitive UI elements (buttons or gestures) for interacting with nodes and navigating through levels.
   • Implement feedback mechanisms such as:
     • A success message for correct selections.
     • A retry option or hint for incorrect selections.
     • A prompt for memorization score submission upon correct selection.

4. Performance Optimization

   • Ensure that the loading of nodes and tree traversal remains smooth, even for deeper levels with multiple nodes. Use lazy loading techniques if needed.

5. Edge Case Handling

   • Handle cases where:
     • Users make rapid selections (debounce input to prevent accidental multiple clicks).
     • There is no valid path forward due to incorrect selections.
     • The user wishes to skip a question and return later.

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Additional Considerations

• Accessibility: Ensure the navigation flow is accessible, with options for screen readers and easy-to-understand prompts.
• Error Handling: Provide meaningful error messages in case of data corruption or other failures during node navigation.
• Support a breadcrumb mechanism or visual indicators to show the user's current position within the tree structure.

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