Block Hooks API: Harmonize ignoredHookedBlocks metadata injection logic

[tjcafferkey]

This PR aims to haromize the injection of the ignoredHookedBlocks data. We currently have two points of processing for this with the first being for wp_template & wp_template_part and the second being for wp_navigation which is stored separately in the wp_postmeta table. For us to combine these into a single approach this PR has a conditional statement to handle wp_navigation items separately.

I've also created (and tested) a new function to build template objects (WP_Template) from database objects (stdClass) which is where we intercept this data when the controller prepares it for the database.

Trac ticket: https://core.trac.wordpress.org/ticket/60759

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[tjcafferkey]

@ockham interested to know your thoughts on this approach. I can see an argument against the new function (_build_block_template_object_from_database_object) but without it the function inject_ignored_hooked_blocks_metadata_attributes becomes somewhat unwieldy and potentially hard to navigation.

I would prefer to write more unit tests but will wait on your feedback on the general approach before doing so.

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[ockham]

Hmm, looks like inject_ignored_hooked_blocks_metadata_attributes was previously really template-specific. I'm second-guessing now if it makes sense to use it as a shared filter for both rest_pre_insert_wp_template (and _part) on the one hand, and for rest_pre_insert_wp_navigation on the other, when we have to accommodate vastly different logic for those cases under the roof of that function after all 😕

I'm starting to think that we should after all start with a distinct filter function for rest_pre_insert_wp_navigation (basically copying over block_core_navigation_update_ignore_hooked_blocks_meta), and then work backwards from there 🤔

[ockham]

I'm starting to think that we should after all start with a distinct filter function for rest_pre_insert_wp_navigation (basically copying over block_core_navigation_update_ignore_hooked_blocks_meta), and then work backwards from there 🤔

We could probably extract a helper function for the applying the Block Hooks algorithm itself (i.e. running get_hooked_blocks, creating the visitors, and running traverse_and_serialized_blocks) that could hopefully be used by both inject_ignored_hooked_blocks_metadata_attributes and block_core_navigation_update_ignore_hooked_blocks_meta (or whatever we'll rename the latter to).

[tjcafferkey]

We could probably extract a helper function for the applying the Block Hooks algorithm itself (i.e. running get_hooked_blocks, creating the visitors, and running traverse_and_serialized_blocks) that could hopefully be used by both inject_ignored_hooked_blocks_metadata_attributes and block_core_navigation_update_ignore_hooked_blocks_meta (or whatever we'll rename the latter to).

I think it makes sense to keep the two concerns (injecting the data into template markup vs updating it in wp_postmeta) separate.

I've experimented with this approach here https://github.com/WordPress/wordpress-develop/pull/6604

Keen to know how you feel it compares to this one based on your comments above.

[ockham]

I've experimented with this approach here #6604

Keen to know how you feel it compares to this one based on your comments above.

Loving it! That one reads a lot more naturally IMO 😄

[ockham]

Should we close this one in favor of https://github.com/WordPress/wordpress-develop/pull/6604? 😊

[tjcafferkey]

Should we close this one in favor of https://github.com/WordPress/wordpress-develop/pull/6604? 😊

Closing 😄