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<?php
/**
 * Sets up the default filters and actions for Multisite.
 *
 * If you need to remove a default hook, this file will give you the priority
 * for which to use to remove the hook.
 *
 * Not all of the Multisite default hooks are found in ms-default-filters.php
 *
 * @package WordPress
 * @subpackage Multisite
 * @see default-filters.php
 * @since 3.0.0
 */

add_action( 'init', 'ms_subdomain_constants' );

// Functions
add_action( 'update_option_blog_public', 'update_blog_public', 10, 2 );
add_filter( 'option_users_can_register', 'users_can_register_signup_filter' );
add_filter( 'site_option_welcome_user_email', 'welcome_user_msg_filter' );

// Users
add_filter( 'wpmu_validate_user_signup', 'signup_nonce_check' );
add_action( 'init', 'maybe_add_existing_user_to_blog' );
add_action( 'wpmu_new_user', 'newuser_notify_siteadmin' );
add_action( 'wpmu_activate_user', 'add_new_user_to_blog', 10, 3 );
add_action( 'wpmu_activate_user', 'wpmu_welcome_user_notification', 10, 3 );
add_action( 'after_signup_user', 'wpmu_signup_user_notification', 10, 4 );
add_action( 'network_site_new_created_user',   'wp_send_new_user_notifications' );
add_action( 'network_site_users_created_user', 'wp_send_new_user_notifications' );
add_action( 'network_user_new_created_user',   'wp_send_new_user_notifications' );
add_filter( 'sanitize_user', 'strtolower' );

// Roles
add_action( 'switch_blog', 'wp_switch_roles_and_user', 1, 2 );

// Blogs
add_filter( 'wpmu_validate_blog_signup', 'signup_nonce_check' );
add_action( 'wpmu_new_blog', 'wpmu_log_new_registrations', 10, 2 );
add_action( 'wpmu_new_blog', 'newblog_notify_siteadmin', 10, 2 );
add_action( 'wpmu_activate_blog', 'wpmu_welcome_notification', 10, 5 );
add_action( 'after_signup_site', 'wpmu_signup_blog_notification', 10, 7 );

// Register Nonce
add_action( 'signup_hidden_fields', 'signup_nonce_fields' );

// Template
add_action( 'template_redirect', 'maybe_redirect_404' );
add_filter( 'allowed_redirect_hosts', 'redirect_this_site' );

// Administration
add_filter( 'term_id_filter', 'global_terms', 10, 2 );
add_action( 'delete_post', '_update_posts_count_on_delete' );
add_action( 'delete_post', '_update_blog_date_on_post_delete' );
add_action( 'transition_post_status', '_update_blog_date_on_post_publish', 10, 3 );
add_action( 'transition_post_status', '_update_posts_count_on_transition_post_status', 10, 3 );

// Counts
add_action( 'admin_init', 'wp_schedule_update_network_counts');
add_action( 'update_network_counts', 'wp_update_network_counts', 10, 0 );
foreach ( array( 'user_register', 'deleted_user', 'wpmu_new_user', 'make_spam_user', 'make_ham_user' ) as $action )
	add_action( $action, 'wp_maybe_update_network_user_counts', 10, 0 );
foreach ( array( 'make_spam_blog', 'make_ham_blog', 'archive_blog', 'unarchive_blog', 'make_delete_blog', 'make_undelete_blog' ) as $action )
	add_action( $action, 'wp_maybe_update_network_site_counts', 10, 0 );
unset( $action );

// Files
add_filter( 'wp_upload_bits', 'upload_is_file_too_big' );
add_filter( 'import_upload_size_limit', 'fix_import_form_size' );
add_filter( 'upload_mimes', 'check_upload_mimes' );
add_filter( 'upload_size_limit', 'upload_size_limit_filter' );
add_action( 'upload_ui_over_quota', 'multisite_over_quota_message' );

// Mail
add_action( 'phpmailer_init', 'fix_phpmailer_messageid' );

// Disable somethings by default for multisite
add_filter( 'enable_update_services_configuration', '__return_false' );
if ( ! defined('POST_BY_EMAIL') || ! POST_BY_EMAIL ) // back compat constant.
	add_filter( 'enable_post_by_email_configuration', '__return_false' );
if ( ! defined('EDIT_ANY_USER') || ! EDIT_ANY_USER ) // back compat constant.
	add_filter( 'enable_edit_any_user_configuration', '__return_false' );
add_filter( 'force_filtered_html_on_import', '__return_true' );

// WP_HOME and WP_SITEURL should not have any effect in MS
remove_filter( 'option_siteurl', '_config_wp_siteurl' );
remove_filter( 'option_home',    '_config_wp_home'    );

// Some options changes should trigger site details refresh.
add_action( 'update_option_blogname',   'clean_site_details_cache', 10, 0 );
add_action( 'update_option_siteurl',    'clean_site_details_cache', 10, 0 );
add_action( 'update_option_post_count', 'clean_site_details_cache', 10, 0 );
add_action( 'update_option_home',       'clean_site_details_cache', 10, 0 );

// If the network upgrade hasn't run yet, assume ms-files.php rewriting is used.
add_filter( 'default_site_option_ms_files_rewriting', '__return_true' );

// Whitelist multisite domains for HTTP requests
add_filter( 'http_request_host_is_external', 'ms_allowed_http_request_hosts', 20, 2 );