Fix opt out all essential.

[tvandort]

Closes:

• https://ethyca.atlassian.net/browse/LJ-463
• https://ethyca.atlassian.net/browse/LJ-466

Description Of Changes

1. Fixes TCModelError when opting into some purposes
2. Opt out of all no longer affects "notice only" notices.

• Notice-only preferences are preserved when rejecting all other preferences
• TCF and custom purpose consents are properly separated and handled independently
• The consent UI correctly reflects and maintains different types of consent preferences
• The system properly handles mixed scenarios where users opt in/out of both TCF and custom consents

Code Changes

TCF Overlay Component Changes:

• Added handling for notice-only custom purposes in the handleRejectAll function
• Modified the logic to preserve notice-only consent preferences when rejecting all other preferences
• Added support for ConsentMechanism type to better handle different consent types

TCF Purposes Component Changes:

• Improved the onToggle handler to properly filter between TCF purposes and custom purposes
• Added type safety for the item parameter in the toggle handler
• Fixed the logic to prevent mixing TCF and custom purpose consents incorrectly

Test Coverage Improvements:

• Added new comprehensive test cases for mixed consent scenarios:
• Testing opt-in to both custom consent and TCF consent
• Testing opt-out of both custom consent and TCF consent
• Updated existing tests to properly handle notice-only preferences
• Added verification of consent cookie states and API request payloads

Documentation Updates:

• Updated comments to clarify the handling of enabled IDs that could include both TCF and custom enabled IDs
• Removed a deferred test case that was no longer needed

Steps to Confirm

1. On TCF experience, add some custom notices

2. In demo page, open up layer 2, opt in to some custom notices and some TCF purposes in the “Purposes” tab

3. Open up console

4. Click “save”

5. Ensure that there are no errors in the console

6. On TCF experience, add an essential notice

7. In demo page, click reject all

8. See that "Essential" notice is "false" in window.Fides, the cookie, and the modal, if you re-open it. It should remain “true” and toggled on.

Pre-Merge Checklist

• Issue requirements met
• All CI pipelines succeeded
• CHANGELOG.md updated
  • Add a db-migration This indicates that a change includes a database migration label to the entry if your change includes a DB migration
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• Followup issues:
  • Followup issues created (include link)
  • No followup issues
• Database migrations:
  • Ensure that your downrev is up to date with the latest revision on main
  • Ensure that your downgrade() migration is correct and works
    • If a downgrade migration is not possible for this change, please call this out in the PR description!
  • No migrations
• Documentation:
  • Documentation complete, PR opened in fidesdocs
  • Documentation issue created in fidesdocs
  • If there are any new client scopes created as part of the pull request, remember to update public-facing documentation that references our scope registry
  • No documentation updates required

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Name	Status	Preview	Comments	Updated (UTC)
fides-privacy-center	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 6, 2025 10:09pm

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[gilluminate]

I've thoroughly tested these changes and can confirm that the fixes are working as intended. The system now correctly handles:

• Notice-only preferences being preserved during reject all operations
• Proper separation between TCF and custom purpose consents
• Mixed consent scenarios where users opt in/out of both TCF and custom consents

[cypress]

fides    Run #12634

Run Properties:   Passed #12634  •  9b399f836f: Fix opt out all essential. (#5850)

Project	fides
Branch Review	main
Run status	Passed #12634
Run duration	00m 50s
Commit	9b399f836f: Fix opt out all essential. (#5850)
Committer	Tom Van Dort
View all properties for this run ↗︎

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Test results
Failures	0
Flaky	0
Pending	0
Skipped	0
Passing	5
View all changes introduced in this branch ↗︎