fix: sidebar unitid undefined

[wgu-jesse-stewart]

Fixes #1747

This bug is due to activeUnitId being null when viewing a locked unit. The fix was to add some defensiveness to the handleUnitClick and checkBlockCompletion functions.

This prevents sendTrackEvent, sendTrackingLogEvent, checkBlockCompletion from running when navigating from a locked unit. If those methods need to run, even when the unit is locked, then we need to add some more logic to handle that state without throwing a null pointer error.

Sidebar-unitID-undefined.mp4

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[Copilot]

Pull Request Overview

This pull request fixes a bug where the active unit ID is null when viewing a locked unit by adding defensive checks in the handleUnitClick and checkBlockCompletion functions.

• Added a guard clause to return immediately in checkBlockCompletion if unitId is falsy.
• Updated handleUnitClick to verify both active and target sequences to prevent subsequent null pointer errors.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/courseware/data/thunks.js	Adds a null-check for unitId in checkBlockCompletion to avoid running side-effect methods when unitId is undefined.
src/courseware/course/sidebar/sidebars/course-outline/hooks.js	Refactors the findSequenceByUnitId helper and adds checks in handleUnitClick to ensure both active and target sequences exist before dispatching actions.

[open-craft-grove]

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[wgu-jesse-stewart]

Sandbox course for testing:
https://pr-1743-f69343.sandboxes.opencraft.hosting/courses/course-v1:test+test44+test44/about