[Backend] Implement Comprehensive Input Validation for Learning Progress Updates

[ayomideadeniran]

🚀 Feature Overview

Implement strict validation for progress updates to maintain data integrity and prevent invalid state transitions.

This is a critical, MVP-critical feature designed to ensure reliable progress tracking.

🛠️ Implementation Requirements

• Build input validation system.
• Include comprehensive unit tests with coverage >90%.
• Add thorough documentation and educational comments.
• Integrate with existing learning infrastructure.

🔧 Technical Specifications

• Built with Node.js and Express.
• Use zod for validation schemas.
• Validate all progress updates.
• Follow security best practices.

✅ Acceptance Criteria

• Validation prevents invalid state transitions.
• Data integrity is maintained.
• All unit tests pass with full coverage.
• Documentation is complete and educational.

🎓 Difficulty Level

Intermediate - Requires understanding of validation and Node.js development.

⏱️ Timeline

ETA: 1 day

[shoaib050326]

@shoaib050326 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi Maintainer, Can you pls assign this to me.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @shoaib050326 to this issue.

[raphael-01-visual]

@raphael-01-visual has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Can I work on this issue ? ETA - 6hrs

ℹ️ Repo Maintainers: To accept this application, review their application or assign @raphael-01-visual to this issue.

[drips-wave]

Congratulations, @raphael-01-visual! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @raphael-01-visual: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

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