Plugin Categories should work with Tags

[dufresnesteven]

If you are browsing the directory using tags and apply a plugin taxonomy (ie: community), you lose the tag as a search filter.

How to Reproduce:

1. Visit ​https://wordpress.org/plugins/tags/ecommerce/.
2. Confirm you can see relevant "ecommerce" results.
3. Click "Community".
4. Notice you are no longer viewing "Community" plugins that relate to the "ecommerce" tag. You are simply viewing community plugins.

[dufresnesteven]

Noting, it does work appropriately when "browsing".

See: ​https://wordpress.org/plugins/browse/blocks/?plugin_business_model=community

Trac: https://meta.trac.wordpress.org/ticket/7430

On URLs such as this: ​https://wordpress.org/plugins/tags/ecommerce/?plugin_business_model=community the theme 404's.

We currently don't support empty archives, except for searches.

The other option would be retaining the filter in the redirect from tags => search.

Personally I feel like the only way to make this actually "nice" is to remove the individual "archives" and instead move to a single "search archive with filters".

[dd32]

In 13190:

Plugin Directory: Enable the Community/Comercial filters on Search results.

See #2753, #7430.

After talking with @StevenDufresne we came to the conclusion that:

• A request for /tags/something/?model=community should return an empty result-set, and not redirect to search.
• A request for /tags/no-plugins-in-this-tag/ should redirect to search. (As it currently does)

The above effectively does this, this is a bit more complicated than I'd have liked, as due to the way WordPress handles taxonomy archives, it needed some juggling.

​https://github.com/WordPress/wordpress.org/assets/767313/ccdb16ca-daac-4d00-bdee-d092c9b1ee4a

[dd32]

In 13192:

Plugin Directory: Register plugin_tags and plugin_contributors taxonomies first.

This helps with template routing, as it ensures they're returned by get_queried_object() in preference to other taxonomies.

See #7430.

[dd32]

In 13194:

SEO: Canonical: Support basic multi-taxonomy queries.

This isn't perfect, and will definately have edge-cases.

See #7430.

[dd32]

In 13195:

Plugin Directory: Remoev the query_var for taxonomies which are internal and not intended on being queried.

This allows the SEO canonical code to avoid including it in the generated URL.

See #7430.

[dd32]

In 13196:

Plugin Directory: Allow tags to be filtered by taxonomies.

This adjusts the styles and templates to simplify the behaviour, allowing for an "empty" archive to be displayed.

Closes ​https://github.com/WordPress/wordpress.org/pull/198.
See #7430.

[dd32]

In 13221:

Plugin Directory: Register the plugin_tags taxonomy before plugin_category.

Followup to [13192].
See #7430.