<?php

/**

 * Site/blog functions that work with the blogs table and related data.

 *

 * @package WordPress

 * @subpackage Multisite

 * @since MU (3.0.0)

 */

require_once ABSPATH . WPINC . '/ms-site.php';

require_once ABSPATH . WPINC . '/ms-network.php';

/**

 * Update the last_updated field for the current site.

 *

 * @since MU (3.0.0)

 */

function wpmu_update_blogs_date() {

	$site_id = get_current_blog_id();

	update_blog_details( $site_id, array( 'last_updated' => current_time( 'mysql', true ) ) );

	/**

	 * Fires after the blog details are updated.

	 *

	 * @since MU (3.0.0)

	 *

	 * @param int $blog_id Site ID.

	 */

	do_action( 'wpmu_blog_updated', $site_id );

}

/**

 * Get a full blog URL, given a blog ID.

 *

 * @since MU (3.0.0)

 *

 * @param int $blog_id Blog ID.

 * @return string Full URL of the blog if found. Empty string if not.

 */

function get_blogaddress_by_id( $blog_id ) {

	$bloginfo = get_site( (int) $blog_id );

	if ( empty( $bloginfo ) ) {

		return '';

	}

	$scheme = parse_url( $bloginfo->home, PHP_URL_SCHEME );

	$scheme = empty( $scheme ) ? 'http' : $scheme;

	return esc_url( $scheme . '://' . $bloginfo->domain . $bloginfo->path );

}

/**

 * Get a full blog URL, given a blog name.

 *

 * @since MU (3.0.0)

 *

 * @param string $blogname The (subdomain or directory) name

 * @return string

 */

function get_blogaddress_by_name( $blogname ) {

	if ( is_subdomain_install() ) {

		if ( 'main' === $blogname ) {

			$blogname = 'www';

		}

		$url = rtrim( network_home_url(), '/' );

		if ( ! empty( $blogname ) ) {

			$url = preg_replace( '|^([^\.]+://)|', '${1}' . $blogname . '.', $url );

		}

	} else {

		$url = network_home_url( $blogname );

	}

	return esc_url( $url . '/' );

}

/**

 * Retrieves a sites ID given its (subdomain or directory) slug.

 *

 * @since MU (3.0.0)

 * @since 4.7.0 Converted to use `get_sites()`.

 *

 * @param string $slug A site's slug.

 * @return int|null The site ID, or null if no site is found for the given slug.

 */

function get_id_from_blogname( $slug ) {

	$current_network = get_network();

	$slug            = trim( $slug, '/' );

	if ( is_subdomain_install() ) {

		$domain = $slug . '.' . preg_replace( '|^www\.|', '', $current_network->domain );

		$path   = $current_network->path;

	} else {

		$domain = $current_network->domain;

		$path   = $current_network->path . $slug . '/';

	}

	$site_ids = get_sites(

		array(

			'number'                 => 1,

			'fields'                 => 'ids',

			'domain'                 => $domain,

			'path'                   => $path,

			'update_site_meta_cache' => false,

		)

	);

	if ( empty( $site_ids ) ) {

		return null;

	}

	return array_shift( $site_ids );

}

/**

 * Retrieve the details for a blog from the blogs table and blog options.

 *

 * @since MU (3.0.0)

 *

 * @global wpdb $wpdb WordPress database abstraction object.

 *

 * @param int|string|array $fields  Optional. A blog ID, a blog slug, or an array of fields to query against.

 *                                  If not specified the current blog ID is used.

 * @param bool             $get_all Whether to retrieve all details or only the details in the blogs table.

 *                                  Default is true.

 * @return WP_Site|false Blog details on success. False on failure.

 */

function get_blog_details( $fields = null, $get_all = true ) {

	global $wpdb;

	if ( is_array( $fields ) ) {

		if ( isset( $fields['blog_id'] ) ) {

			$blog_id = $fields['blog_id'];

		} elseif ( isset( $fields['domain'] ) && isset( $fields['path'] ) ) {

			$key  = md5( $fields['domain'] . $fields['path'] );

			$blog = wp_cache_get( $key, 'blog-lookup' );

			if ( false !== $blog ) {

				return $blog;

			}

			if ( 'www.' === substr( $fields['domain'], 0, 4 ) ) {

				$nowww = substr( $fields['domain'], 4 );

				$blog  = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain IN (%s,%s) AND path = %s ORDER BY CHAR_LENGTH(domain) DESC", $nowww, $fields['domain'], $fields['path'] ) );

			} else {

				$blog = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain = %s AND path = %s", $fields['domain'], $fields['path'] ) );

			}

			if ( $blog ) {

				wp_cache_set( $blog->blog_id . 'short', $blog, 'blog-details' );

				$blog_id = $blog->blog_id;

			} else {

				return false;

			}

		} elseif ( isset( $fields['domain'] ) && is_subdomain_install() ) {

			$key  = md5( $fields['domain'] );

			$blog = wp_cache_get( $key, 'blog-lookup' );

			if ( false !== $blog ) {

				return $blog;

			}

			if ( 'www.' === substr( $fields['domain'], 0, 4 ) ) {

				$nowww = substr( $fields['domain'], 4 );

				$blog  = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain IN (%s,%s) ORDER BY CHAR_LENGTH(domain) DESC", $nowww, $fields['domain'] ) );

			} else {

				$blog = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain = %s", $fields['domain'] ) );

			}

			if ( $blog ) {

				wp_cache_set( $blog->blog_id . 'short', $blog, 'blog-details' );

				$blog_id = $blog->blog_id;

			} else {

				return false;

			}

		} else {

			return false;

		}

	} else {

		if ( ! $fields ) {

			$blog_id = get_current_blog_id();

		} elseif ( ! is_numeric( $fields ) ) {

			$blog_id = get_id_from_blogname( $fields );

		} else {

			$blog_id = $fields;

		}

	}

	$blog_id = (int) $blog_id;

	$all     = $get_all ? '' : 'short';

	$details = wp_cache_get( $blog_id . $all, 'blog-details' );

	if ( $details ) {

		if ( ! is_object( $details ) ) {

			if ( -1 == $details ) {

				return false;

			} else {

				// Clear old pre-serialized objects. Cache clients do better with that.

				wp_cache_delete( $blog_id . $all, 'blog-details' );

				unset( $details );

			}

		} else {

			return $details;

		}

	}

	// Try the other cache.

	if ( $get_all ) {

		$details = wp_cache_get( $blog_id . 'short', 'blog-details' );

	} else {

		$details = wp_cache_get( $blog_id, 'blog-details' );

		// If short was requested and full cache is set, we can return.

		if ( $details ) {

			if ( ! is_object( $details ) ) {

				if ( -1 == $details ) {

					return false;

				} else {

					// Clear old pre-serialized objects. Cache clients do better with that.

					wp_cache_delete( $blog_id, 'blog-details' );

					unset( $details );

				}

			} else {

				return $details;

			}

		}

	}

	if ( empty( $details ) ) {

		$details = WP_Site::get_instance( $blog_id );

		if ( ! $details ) {

			// Set the full cache.

			wp_cache_set( $blog_id, -1, 'blog-details' );

			return false;

		}

	}

	if ( ! $details instanceof WP_Site ) {

		$details = new WP_Site( $details );

	}

	if ( ! $get_all ) {

		wp_cache_set( $blog_id . $all, $details, 'blog-details' );

		return $details;

	}

	$switched_blog = false;

	if ( get_current_blog_id() !== $blog_id ) {

		switch_to_blog( $blog_id );

		$switched_blog = true;

	}

	$details->blogname   = get_option( 'blogname' );

	$details->siteurl    = get_option( 'siteurl' );

	$details->post_count = get_option( 'post_count' );

	$details->home       = get_option( 'home' );

	if ( $switched_blog ) {

		restore_current_blog();

	}

	/**

	 * Filters a blog's details.

	 *

	 * @since MU (3.0.0)

	 * @deprecated 4.7.0 Use {@see 'site_details'} instead.

	 *

	 * @param WP_Site $details The blog details.

	 */

	$details = apply_filters_deprecated( 'blog_details', array( $details ), '4.7.0', 'site_details' );

	wp_cache_set( $blog_id . $all, $details, 'blog-details' );

	$key = md5( $details->domain . $details->path );

	wp_cache_set( $key, $details, 'blog-lookup' );

	return $details;

}

/**

 * Clear the blog details cache.

 *

 * @since MU (3.0.0)

 *

 * @param int $blog_id Optional. Blog ID. Defaults to current blog.

 */

function refresh_blog_details( $blog_id = 0 ) {

	$blog_id = (int) $blog_id;

	if ( ! $blog_id ) {

		$blog_id = get_current_blog_id();

	}

	clean_blog_cache( $blog_id );

}

/**

 * Update the details for a blog. Updates the blogs table for a given blog ID.

 *

 * @since MU (3.0.0)

 *

 * @global wpdb $wpdb WordPress database abstraction object.

 *

 * @param int   $blog_id Blog ID.

 * @param array $details Array of details keyed by blogs table field names.

 * @return bool True if update succeeds, false otherwise.

 */

function update_blog_details( $blog_id, $details = array() ) {

	global $wpdb;

	if ( empty( $details ) ) {

		return false;

	}

	if ( is_object( $details ) ) {

		$details = get_object_vars( $details );

	}

	$site = wp_update_site( $blog_id, $details );

	if ( is_wp_error( $site ) ) {

		return false;

	}

	return true;

}

/**

 * Cleans the site details cache for a site.

 *

 * @since 4.7.4

 *

 * @param int $site_id Optional. Site ID. Default is the current site ID.

 */

function clean_site_details_cache( $site_id = 0 ) {

	$site_id = (int) $site_id;

	if ( ! $site_id ) {

		$site_id = get_current_blog_id();

	}

	wp_cache_delete( $site_id, 'site-details' );

	wp_cache_delete( $site_id, 'blog-details' );

}

/**

 * Retrieve option value for a given blog id based on name of option.

 *

 * If the option does not exist or does not have a value, then the return value

 * will be false. This is useful to check whether you need to install an option

 * and is commonly used during installation of plugin options and to test

 * whether upgrading is required.

 *

 * If the option was serialized then it will be unserialized when it is returned.

 *

 * @since MU (3.0.0)

 *

 * @param int    $id      A blog ID. Can be null to refer to the current blog.

 * @param string $option  Name of option to retrieve. Expected to not be SQL-escaped.

 * @param mixed  $default Optional. Default value to return if the option does not exist.

 * @return mixed Value set for the option.

 */

function get_blog_option( $id, $option, $default = false ) {

	$id = (int) $id;

	if ( empty( $id ) ) {

		$id = get_current_blog_id();

	}

	if ( get_current_blog_id() == $id ) {

		return get_option( $option, $default );

	}

	switch_to_blog( $id );

	$value = get_option( $option, $default );

	restore_current_blog();

	/**

	 * Filters a blog option value.

	 *

	 * The dynamic portion of the hook name, `$option`, refers to the blog option name.

	 *

	 * @since 3.5.0

	 *

	 * @param string  $value The option value.

	 * @param int     $id    Blog ID.

	 */

	return apply_filters( "blog_option_{$option}", $value, $id );

}

/**

 * Add a new option for a given blog ID.

 *

 * You do not need to serialize values. If the value needs to be serialized, then

 * it will be serialized before it is inserted into the database. Remember,

 * resources can not be serialized or added as an option.

 *

 * You can create options without values and then update the values later.

 * Existing options will not be updated and checks are performed to ensure that you

 * aren't adding a protected WordPress option. Care should be taken to not name

 * options the same as the ones which are protected.

 *

 * @since MU (3.0.0)

 *

 * @param int    $id     A blog ID. Can be null to refer to the current blog.

 * @param string $option Name of option to add. Expected to not be SQL-escaped.

 * @param mixed  $value  Optional. Option value, can be anything. Expected to not be SQL-escaped.

 * @return bool True if the option was added, false otherwise.

 */

function add_blog_option( $id, $option, $value ) {

	$id = (int) $id;

	if ( empty( $id ) ) {

		$id = get_current_blog_id();

	}

	if ( get_current_blog_id() == $id ) {