<?php

/**

 * Multisite administration functions.

 *

 * @package WordPress

 * @subpackage Multisite

 * @since 3.0.0

 */

/**

 * Determine if uploaded file exceeds space quota.

 *

 * @since 3.0.0

 *

 * @param array $file $_FILES array for a given file.

 * @return array $_FILES array with 'error' key set if file exceeds quota. 'error' is empty otherwise.

 */

function check_upload_size( $file ) {

	if ( get_site_option( 'upload_space_check_disabled' ) ) {

		return $file;

	}

	if ( $file['error'] != '0' ) { // there's already an error

		return $file;

	}

	if ( defined( 'WP_IMPORTING' ) ) {

		return $file;

	}

	$space_left = get_upload_space_available();

	$file_size = filesize( $file['tmp_name'] );

	if ( $space_left < $file_size ) {

		/* translators: %s: required disk space in kilobytes */

		$file['error'] = sprintf( __( 'Not enough space to upload. %s KB needed.' ), number_format( ( $file_size - $space_left ) / KB_IN_BYTES ) );

	}

	if ( $file_size > ( KB_IN_BYTES * get_site_option( 'fileupload_maxk', 1500 ) ) ) {

		/* translators: %s: maximum allowed file size in kilobytes */

		$file['error'] = sprintf( __( 'This file is too big. Files must be less than %s KB in size.' ), get_site_option( 'fileupload_maxk', 1500 ) );

	}

	if ( upload_is_user_over_quota( false ) ) {

		$file['error'] = __( 'You have used your space quota. Please delete files before uploading.' );

	}

	if ( $file['error'] != '0' && ! isset( $_POST['html-upload'] ) && ! wp_doing_ajax() ) {

		wp_die( $file['error'] . ' <a href="javascript:history.go(-1)">' . __( 'Back' ) . '</a>' );

	}

	return $file;

}

/**

 * Delete a site.

 *

 * @since 3.0.0

 * @since 5.1.0 Use wp_delete_site() internally to delete the site row from the database.

 *

 * @global wpdb $wpdb WordPress database abstraction object.

 *

 * @param int  $blog_id Site ID.

 * @param bool $drop    True if site's database tables should be dropped. Default is false.

 */

function wpmu_delete_blog( $blog_id, $drop = false ) {

	global $wpdb;

	$switch = false;

	if ( get_current_blog_id() != $blog_id ) {

		$switch = true;

		switch_to_blog( $blog_id );

	}

	$blog = get_site( $blog_id );

	$current_network = get_network();

	// If a full blog object is not available, do not destroy anything.

	if ( $drop && ! $blog ) {

		$drop = false;

	}

	// Don't destroy the initial, main, or root blog.

	if ( $drop && ( 1 == $blog_id || is_main_site( $blog_id ) || ( $blog->path == $current_network->path && $blog->domain == $current_network->domain ) ) ) {

		$drop = false;

	}

	$upload_path = trim( get_option( 'upload_path' ) );

	// If ms_files_rewriting is enabled and upload_path is empty, wp_upload_dir is not reliable.

	if ( $drop && get_site_option( 'ms_files_rewriting' ) && empty( $upload_path ) ) {

		$drop = false;

	}

	if ( $drop ) {

		wp_delete_site( $blog_id );

	} else {

		/** This action is documented in wp-includes/ms-blogs.php */

		do_action_deprecated( 'delete_blog', array( $blog_id, false ), '5.1.0' );

		$users = get_users(

			array(

				'blog_id' => $blog_id,

				'fields'  => 'ids',

			)

		);

		// Remove users from this blog.

		if ( ! empty( $users ) ) {

			foreach ( $users as $user_id ) {

				remove_user_from_blog( $user_id, $blog_id );

			}

		}

		update_blog_status( $blog_id, 'deleted', 1 );

		/** This action is documented in wp-includes/ms-blogs.php */

		do_action_deprecated( 'deleted_blog', array( $blog_id, false ), '5.1.0' );

	}

	if ( $switch ) {

		restore_current_blog();

	}

}

/**

 * Delete a user from the network and remove from all sites.

 *

 * @since 3.0.0

 *

 * @todo Merge with wp_delete_user() ?

 *

 * @global wpdb $wpdb WordPress database abstraction object.

 *

 * @param int $id The user ID.

 * @return bool True if the user was deleted, otherwise false.

 */

function wpmu_delete_user( $id ) {

	global $wpdb;

	if ( ! is_numeric( $id ) ) {

		return false;

	}

	$id   = (int) $id;

	$user = new WP_User( $id );

	if ( ! $user->exists() ) {

		return false;

	}

	// Global super-administrators are protected, and cannot be deleted.

	$_super_admins = get_super_admins();

	if ( in_array( $user->user_login, $_super_admins, true ) ) {

		return false;

	}

	/**

	 * Fires before a user is deleted from the network.

	 *

	 * @since MU (3.0.0)

	 *

	 * @param int $id ID of the user about to be deleted from the network.

	 */

	do_action( 'wpmu_delete_user', $id );

	$blogs = get_blogs_of_user( $id );

	if ( ! empty( $blogs ) ) {

		foreach ( $blogs as $blog ) {

			switch_to_blog( $blog->userblog_id );

			remove_user_from_blog( $id, $blog->userblog_id );

			$post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_author = %d", $id ) );

			foreach ( (array) $post_ids as $post_id ) {

				wp_delete_post( $post_id );

			}

			// Clean links

			$link_ids = $wpdb->get_col( $wpdb->prepare( "SELECT link_id FROM $wpdb->links WHERE link_owner = %d", $id ) );

			if ( $link_ids ) {

				foreach ( $link_ids as $link_id ) {

					wp_delete_link( $link_id );

				}

			}

			restore_current_blog();

		}

	}

	$meta = $wpdb->get_col( $wpdb->prepare( "SELECT umeta_id FROM $wpdb->usermeta WHERE user_id = %d", $id ) );

	foreach ( $meta as $mid ) {

		delete_metadata_by_mid( 'user', $mid );

	}

	$wpdb->delete( $wpdb->users, array( 'ID' => $id ) );

	clean_user_cache( $user );

	/** This action is documented in wp-admin/includes/user.php */

	do_action( 'deleted_user', $id, null );

	return true;

}

/**

 * Check whether a site has used its allotted upload space.

 *

 * @since MU (3.0.0)

 *

 * @param bool $echo Optional. If $echo is set and the quota is exceeded, a warning message is echoed. Default is true.

 * @return bool True if user is over upload space quota, otherwise false.

 */

function upload_is_user_over_quota( $echo = true ) {

	if ( get_site_option( 'upload_space_check_disabled' ) ) {

		return false;

	}

	$space_allowed = get_space_allowed();

	if ( ! is_numeric( $space_allowed ) ) {

		$space_allowed = 10; // Default space allowed is 10 MB

	}

	$space_used = get_space_used();

	if ( ( $space_allowed - $space_used ) < 0 ) {

		if ( $echo ) {

			printf(

				/* translators: %s: allowed space allocation */

				__( 'Sorry, you have used your space allocation of %s. Please delete some files to upload more files.' ),

				size_format( $space_allowed * MB_IN_BYTES )

			);

		}

		return true;

	} else {

		return false;

	}

}

/**

 * Displays the amount of disk space used by the current site. Not used in core.

 *

 * @since MU (3.0.0)

 */

function display_space_usage() {

	$space_allowed = get_space_allowed();

	$space_used    = get_space_used();

	$percent_used = ( $space_used / $space_allowed ) * 100;

	if ( $space_allowed > 1000 ) {

		$space = number_format( $space_allowed / KB_IN_BYTES );

		/* translators: Gigabytes */

		$space .= __( 'GB' );

	} else {

		$space = number_format( $space_allowed );

		/* translators: Megabytes */

		$space .= __( 'MB' );

	}

	?>

	<strong>

	<?php

		/* translators: Storage space that's been used. 1: Percentage of used space, 2: Total space allowed in megabytes or gigabytes */

		printf( __( 'Used: %1$s%% of %2$s' ), number_format( $percent_used ), $space );

	?>

	</strong>

	<?php

}

/**

 * Get the remaining upload space for this site.

 *

 * @since MU (3.0.0)

 *

 * @param int $size Current max size in bytes

 * @return int Max size in bytes

 */

function fix_import_form_size( $size ) {

	if ( upload_is_user_over_quota( false ) ) {

		return 0;

	}

	$available = get_upload_space_available();

	return min( $size, $available );

}

/**

 * Displays the site upload space quota setting form on the Edit Site Settings screen.

 *

 * @since 3.0.0

 *

 * @param int $id The ID of the site to display the setting for.

 */

function upload_space_setting( $id ) {

	switch_to_blog( $id );

	$quota = get_option( 'blog_upload_space' );

	restore_current_blog();

	if ( ! $quota ) {

		$quota = '';

	}

	?>

	<tr>

		<th><label for="blog-upload-space-number"><?php _e( 'Site Upload Space Quota' ); ?></label></th>

		<td>

			<input type="number" step="1" min="0" style="width: 100px" name="option[blog_upload_space]" id="blog-upload-space-number" aria-describedby="blog-upload-space-desc" value="<?php echo $quota; ?>" />

			<span id="blog-upload-space-desc"><span class="screen-reader-text"><?php _e( 'Size in megabytes' ); ?></span> <?php _e( 'MB (Leave blank for network default)' ); ?></span>

		</td>

	</tr>

	<?php

}

/**

 * Update the status of a user in the database.

 *

 * Used in core to mark a user as spam or "ham" (not spam) in Multisite.

 *

 * @since 3.0.0

 *

 * @global wpdb $wpdb WordPress database abstraction object.

 *

 * @param int    $id         The user ID.

 * @param string $pref       The column in the wp_users table to update the user's status

 *                           in (presumably user_status, spam, or deleted).

 * @param int    $value      The new status for the user.

 * @param null   $deprecated Deprecated as of 3.0.2 and should not be used.

 * @return int   The initially passed $value.

 */

function update_user_status( $id, $pref, $value, $deprecated = null ) {

	global $wpdb;

	if ( null !== $deprecated ) {

		_deprecated_argument( __FUNCTION__, '3.0.2' );

	}

	$wpdb->update( $wpdb->users, array( sanitize_key( $pref ) => $value ), array( 'ID' => $id ) );

	$user = new WP_User( $id );

	clean_user_cache( $user );

	if ( $pref == 'spam' ) {

		if ( $value == 1 ) {

			/**

			 * Fires after the user is marked as a SPAM user.

			 *

			 * @since 3.0.0

			 *

			 * @param int $id ID of the user marked as SPAM.

			 */

			do_action( 'make_spam_user', $id );

		} else {

			/**

			 * Fires after the user is marked as a HAM user. Opposite of SPAM.

			 *

			 * @since 3.0.0

			 *

			 * @param int $id ID of the user marked as HAM.

			 */

			do_action( 'make_ham_user', $id );

		}

	}

	return $value;

}

/**

 * Cleans the user cache for a specific user.

 *

 * @since 3.0.0

 *

 * @param int $id The user ID.

 * @return bool|int The ID of the refreshed user or false if the user does not exist.

 */

function refresh_user_details( $id ) {

	$id = (int) $id;

	if ( ! $user = get_userdata( $id ) ) {

		return false;

	}

	clean_user_cache( $user );

	return $id;

}

/**

 * Returns the language for a language code.

 *

 * @since 3.0.0

 *

 * @param string $code Optional. The two-letter language code. Default empty.

 * @return string The language corresponding to $code if it exists. If it does not exist,

 *                then the first two letters of $code is returned.

 */

function format_code_lang( $code = '' ) {

	$code       = strtolower( substr( $code, 0, 2 ) );

	$lang_codes = array(

		'aa' => 'Afar',

		'ab' => 'Abkhazian',

		'af' => 'Afrikaans',

		'ak' => 'Akan',

		'sq' => 'Albanian',

		'am' => 'Amharic',

		'ar' => 'Arabic',

		'an' => 'Aragonese',

		'hy' => 'Armenian',

		'as' => 'Assamese',

		'av' => 'Avaric',

		'ae' => 'Avestan',

		'ay' => 'Aymara',

		'az' => 'Azerbaijani',

		'ba' => 'Bashkir',

		'bm' => 'Bambara',

		'eu' => 'Basque',

		'be' => 'Belarusian',

		'bn' => 'Bengali',

		'bh' => 'Bihari',

		'bi' => 'Bislama',