[jsweep] Clean add_reaction_and_edit_comment.cjs

[github-actions]

Summary

Cleaned actions/setup/js/add_reaction_and_edit_comment.cjs as part of the jsweep unbloat initiative.

Changes

Context: github-script

This file runs in the github-script action context with access to core, github, and context globals.

Code Improvements

• Extracted resolveEventEndpoints() helper — The 90-line switch statement in main() was extracted into a dedicated async function that returns {reactionEndpoint, commentUpdateEndpoint} | null, making main() cleaner and the endpoint logic independently testable
• Module-level VALID_REACTIONS constant — Moved from inside main() to module scope where it belongs; it never changes between calls
• Removed redundant if (commentUpdateEndpoint) guard — After the refactored switch, commentUpdateEndpoint is always set (all returning paths are handled by resolveEventEndpoints returning null), so the guard was unnecessary
• Added Record<string, string> type annotation to EVENT_TYPE_DESCRIPTIONS for clarity
• Exported resolveEventEndpoints and VALID_REACTIONS to enable direct unit testing

Test Improvements

Added 9 new tests (35 → 44 total):

• resolveEventEndpoints() for issues, pull_request, issue_comment, pull_request_review_comment, discussion, discussion_comment events
• resolveEventEndpoints() returns null + calls setFailed when required fields missing
• resolveEventEndpoints() returns null for unknown event type
• VALID_REACTIONS exports the expected list

Validation

• Formatting: npm run format:cjs ✓
• Linting: npm run lint:cjs ✓
• Type checking: npm run typecheck ✓
• Tests: npm run test:js — 44 tests passed ✓

Generated by jsweep - JavaScript Unbloater · ● 16.2M · ◷

• expires on May 9, 2026, 4:54 AM UTC