[TypeScript] courseProgressStore.ts spreads Partial<LessonProgress> without required field verification

[RUKAYAT-CODER]

Overview

courseProgressStore.ts spreads a Partial<LessonProgress> into the store without checking if required fields (e.g., lessonId, progress) are present. This can leave the store in an inconsistent state.

Specifications

Features:

• Validate the lessonData argument before merging using a type guard
• Reject updates that are missing required fields with a typed error

Tasks:

• Define isValidLessonProgress(data: Partial<LessonProgress>): data is LessonProgress
• Apply it before the spread operation
• Write tests for missing required field scenarios

Impacted Files:

• src/store/courseProgressStore.ts

Acceptance Criteria

• Invalid lessonData never enters the store
• TypeScript catches missing required fields at compile time
• Tests verify rejection of incomplete updates

[Nacho1499]

@Nacho1499 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello Maintainer, I am Nacho, a fullstack developer, and I would like to work on this issue.

I have experience working with TypeScript, React Native, and state management, with a strong focus on type safety and maintaining predictable application state. This issue is a great fit because it improves both runtime reliability and compile-time guarantees.

For this issue, I will implement a type guard such as isValidLessonProgress(data: Partial<LessonProgress>): data is LessonProgress to validate incoming data before it's merged into the store. If any required fields, such as lessonId or progress, are missing, the update will be rejected with a typed error instead of allowing the store to enter an inconsistent state. I will also add comprehensive tests covering valid updates as well as scenarios with missing required fields to ensure the validation behaves as expected.

Before submitting my PR, I will verify that:

• Invalid lessonData is never merged into the store.
• Required fields are properly validated using the type guard.
• TypeScript provides stronger compile-time safety.
• Tests cover both successful and rejected update scenarios.

I will ensure the implementation follows the project's coding standards, remains easy to maintain, and satisfies all the acceptance criteria.

I would appreciate the opportunity to contribute. Thank you for your consideration!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Nacho1499 to this issue.

[ZeePearl56]

@ZeePearl56 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I can get this issue done. Pls, just assign to me

ℹ️ Repo Maintainers: To accept this application, review their application or assign @ZeePearl56 to this issue.

[drips-wave]

Congratulations, @Nacho1499! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Nacho1499: 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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🌊 Happy Wave 🌊

[drips-wave]

This issue has been completed by @Nacho1499 as part of the Stellar Wave Program's 7th Wave 🥳

😎 @Nacho1499: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

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