This changeset makes the new CRUD API for sites introduced in [43548] usable for real-world sites. A new function `wp_initialize_site()`, which takes care of creating a site's database tables and populating them with initial values, is hooked into the site insertion process that is initiated when calling `wp_insert_site()`. Similarly, a new function `wp_uninitialize_site()`, which takes care of dropping a site's database tables, is hooked into the site deletion process that is initiated when calling `wp_delete_site()`.
A new function `wp_is_site_initialized()` completes the API, allowing to check whether a site is initialized. Since this function always makes a database request in its default behavior, it should be called with caution. Plugins that would like to use site initialization in special ways can leverage a `pre_wp_is_site_initialized` filter to alter that default behavior.
The separate handling of the site's row in the `wp_blogs` database table and the actual site setup allows for more flexibility in controlling whether or how a site's data is set up. For example, a unit test that only checks data from the site's database table row can unhook the site initialization process to improve performance. At the same time, developers consuming the new sites API only need to know about the CRUD functions, since the initialization and uninitialization processes happen internally.
With this changeset, the foundation for a sites REST API endpoint is fully available. The previously recommended functions `wpmu_create_blog()` and `wpmu_delete_blog()` now call the new respective function internally. Further follow-up work to this includes replacing calls to `wpmu_create_blog()` with `wp_insert_site()`, `update_blog_details()` with `wp_update_site()` and `wpmu_delete_blog()` with `wp_delete_blog()` throughout the codebase.
As a side-effect of this work, the `wpmu_new_blog`, `delete_blog`, and `deleted_blog` actions and the `install_blog()` function have been deprecated.
Fixes#41333. See #40364.
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WPCS 1.0.0 includes a bunch of new auto-fixers, which drops the number of coding standards issues across WordPress significantly. Prior to running the auto-fixers, there were 15,312 issues detected. With this commit, we now drop to 4,769 issues.
This change includes three notable additions:
- Multiline function calls must now put each parameter on a new line.
- Auto-formatting files is now part of the `grunt precommit` script.
- Auto-fixable coding standards issues will now cause Travis failures.
Fixes#44600.
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New functions `wp_insert_site( $data )`, `wp_update_site( $id, $data )` and `wp_delete_site( $id )` are introduced to manage site rows in the `wp_blogs` table, forming the new CRUD API together with the existing `get_site()` / `get_sites()`. The new API provides various benefits over the previously existing API, fixing several cache invalidation issues and being hook-driven so that normalization and validation of the passed data can be fully customized.
New hooks introduced as part of this are the actions `wp_insert_site`, `wp_update_site`, `wp_delete_site`, `wp_validate_site_data` and the filter `wp_normalize_site_data`.
At this point, `wp_insert_site()` does not handle setting up the site's database tables, and `wp_delete_site()` does not handle dropping the site's database tables, so the two can not yet be used directly as full replacements of `wpmu_create_blog()` and `wpmu_delete_blog()`. Managing the site's database tables will be added via hooks as part of the follow-up ticket #41333.
The existing functions `wpmu_create_blog()`, `update_blog_details()`, and `wpmu_delete_blog()` make use of the respective new counterpart and will be obsolete once #41333 has been completed.
Props flixos90, jeremyfelt, spacedmonkey.
Fixes#40364.
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A new global multisite table `wp_blogmeta` is added to the database schema, and a set of `*_site_meta()` API functions are introduced.
The implementation fails gracefully when the new table is not yet available, which may happen especially shortly after the core update, before the network has been upgraded to the new database schema. The presence of the table is detected once and stored as a global setting on the main network.
Core does not yet use site metadata, but there are several use-cases to be implemented or explored in the near future, and it allows plugins to extend sites with arbitrary data, which will come in particularly handy with the upcoming REST API endpoint for sites.
Props spacedmonkey, johnjamesjacoby, jeremyfelt, flixos90.
Fixes#37923.
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While `get_site_by()` makes sense as a more explicit and less complex replacement for `get_blog_details()`, it is not ready yet in terms of caching, where it currently falls short of the older function under specific circumstances.
See #40180, #40228.
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`get_site_by()` is now the preferred way to retrieve a site object by lookup for identifying data. By using a coherent structure and `get_sites()` internally, it has several advantages over the direct database queries and complex code in `get_blog_details()`. Therefore `get_blog_details()` is now a wrapper for `get_site_by()`, providing backward compatibility fixes where necessary.
Unit tests have been adjusted to account for the `blog-details` and `blog-lookup` cache groups, which are no longer needed.
Props spacedmonkey, jeremyfelt, flixos90.
Fixes#40228.
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Going forward, `clean_blog_cache()` is recommended to be used instead of `refresh_blog_details()`. It has been adjusted to match the functionality of the latter, with the exception that it always requires a site ID or object to be passed. The `refresh_blog_details` action has been deprecated in favor of the `clean_site_cache` action. The function itself is not formally deprecated at this point, but will likely be in the near future.
Props spacedmonkey.
Fixes#40201.
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`get_current_blog_id()` is more appropriate for determining the ID of the current site in most cases. This eliminates the need for the global `$wpdb` in several functions and is better than the implicit global used in admin pages.
Props bnap00, spacedmonkey.
Fixes#41684.
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Switching the available roles and the current user's capabilities no longer happens in `switch_to_blog()` and `restore_current_blog()`, instead it has been moved to a new function `wp_switch_roles_and_user()` which is hooked into the site switching process. This allows to improve performance by temporarily unhooking the function when roles and capabilities do not need to be switched.
This change ensures that switching available roles now works closer to switching user capabilities, particularly the changes in [41624]. A new `WP_Roles::for_site( $site_id )` method has been introduced, and the `WP_Roles::_init()` method has been deprecated. It is furthermore possible to retrieve the site ID for which the available roles are currently initialized through a new `WP_Roles::get_site_id()`.
Props johnjamesjacoby, flixos90.
Fixes#38645.
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While it has always been possible to initialize a user's roles and capabilities for another site than the current one in a multisite, the actual roles available were not switched prior to this change, possibly causing invalid roles to show up or actually valid capabilities not being available.
In order to fix this bug in a clean way, relevant parts of the `WP_User` class have been refactored. The ID of the site for which capabilities are currently initialized are now stored in a private property `WP_User::$site_id`. The `WP_User::for_blog( $blog_id )` and `WP_User::_init_caps( $cap_key )` methods have been deprecated in favor of `WP_User::for_site( $site_id )`. In addition, a new method `WP_User::get_site_id()` has been introduced to retrieve the site ID for which the user's capabilities are currently initialized.
Props ryanduff, jeremyfelt, flixos90.
Fixes#36961.
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Previously `update_blog_option()` would trigger an invalidation of that site's entire cache although these changes did not affect the content of these caches. Furthermore changes to the special options `blogname`, `siteurl` and `post_count` should not invalidate the entire cache of that site, but only their respective site details cache. The option `home` now has the same behavior as it also belongs to the site details, but did not invalidate the cache at all previously.
Several new unit tests confirm these changes work as expected.
Fixes#40063.
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Historically, it's been difficult to extend user roles, but reasonable to work around by waiting until after `init` has fired, to add custom roles and capabilities. With the addition of Locale Switching, Core now potentially loads roles before `init` has fired, leaving a window where custom roles and capabilities are not handled.
The new filter allows plugins to add their own custom roles whenever they're initialised (on page load, or when switching sites, for example), so that they can always be obeyed.
`WP_Roles` has also been tidied up a little bit, to remove duplicate code.
Props johnjamesjacoby, pento.
Fixes#23016.
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`get_site()` has replaced `get_blog_details()` throughout core and is the recommended way to retrieve a current or single site object.
The `blog_details` filter is applied when full details are requested from `get_blog_details()`.
To ensure backwards compatibility in the switch to `get_site()`, this `blog_details` filter is now applied in `WP_Site::get_details()` and marked as deprecated with a note to rely instead on the `site_details` filter introduced in 4.6.
Props flixos90.
See #37102.
Fixes#38491.
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`get_network()` falls back to the current network when called without any arguments. Between this and `get_current_network_id()`, we can replace almost all instances of the global `$current_site` and all instances of `get_current_site()`.
This effectively deprecates `get_current_site()`, something that we'll do in a future ticket.
Props flixos90.
Fixes#37414.
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Previously, if a network's domain started with `www.` in a subdomain configuration, a slug lookup with `get_id_from_blogname()` would not match an existing site. A similar lookup in a subdirectory configuration would work fine.
This strips `www.` from the network's domain in a subdomain configuration during the lookup and returns the site as expected.
Adds tests which would previously fail in a subdomain configuration, but now pass in both configurations.
Props igmoweb, flixos90.
Fixes#34450.
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