Classify content within existing Taxonomy terms

[iamdharmesh]

Description of the Change

The PR introduces a new setting option in content classification (IBM Watson NLU) to classify content within existing taxonomy terms. By default, it will adhere to the current behavior, recommending and adding new terms to the post. When the user chooses "Only classify based on existing terms" in the classification method, it will recommend terms only from the existing terms.

Closes #592

How to test the Change

1. Go to Tools > ClassifAI > Language Processing > IBM Watson
2. Choose "Only classify based on existing terms" in the classification method.
3. Create/Edit the post and click the "Suggest terms & tags" button from the classifAI sidebar panel.
4. Verify that suggested terms/tags are from the existing terms only.
5. Go to ClassifAI settings, choose "Add recommended terms " in the classification method and verify that it now suggests new terms/tags as well.
6. Go to ClassifAI settings, and verify that the results of terms/tags in the language processing previewer are also aligned with the current classification method setting.

Changelog Entry

Added - New setting option in content classification to classify content within existing taxonomy terms

Credits

Props @jeffpaul @iamdharmesh

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[faisal-alvi]

Suggestion

The popup would show the notice,

classifai/src/js/gutenberg-plugin.js

Line 266 in e9198e5

'Note that the lists above include any pre-existing terms from this %s.',

We should also tweak this notice when the existing terms-based classification setting is enabled. We can tweak to something like:

'Note that the lists above include only pre-existing terms from this %s. You can change this classification method in settings.'

and add a link on the 'settings' text to the settings page.

[iamdharmesh]

@faisal-alvi

We should also tweak this notice when the existing terms-based classification setting is enabled.

I think Note that the lists above include any pre-existing terms from this Post is meant for existing terms of the specific post and not for all existing terms. So, this might not need an update.

[jeffpaul]

@iamdharmesh @dkotter one item I noticed during UAT today was perhaps a copy tweak, sharing here to see if this resonates with either of you for a quick commit to change before merging this in...

• Changing Add all suggested terms to Recommend terms even if they do not exist on the site
• Changing Only add suggested terms that already exist to Only recommend terms that already exist on the site

[dkotter]

one item I noticed during UAT today was perhaps a copy tweak, sharing here to see if this resonates with either of you for a quick commit to change before merging this in.

Makes sense to me. Pushed an update for that: