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<?php
/**
 * WordPress Dashboard Widget Administration Screen API
 *
 * @package WordPress
 * @subpackage Administration
 */

/**
 * Registers dashboard widgets.
 *
 * Handles POST data, sets up filters.
 *
 * @since 2.5.0
 *
 * @global array $wp_registered_widgets
 * @global array $wp_registered_widget_controls
 * @global callable[] $wp_dashboard_control_callbacks
 */
function wp_dashboard_setup() {
	global $wp_registered_widgets, $wp_registered_widget_controls, $wp_dashboard_control_callbacks;

$screen = get_current_screen();

/* Register Widgets and Controls */
	$wp_dashboard_control_callbacks = array();

// Browser version
	$check_browser = wp_check_browser_version();

if ( $check_browser && $check_browser['upgrade'] ) {
		add_filter( 'postbox_classes_dashboard_dashboard_browser_nag', 'dashboard_browser_nag_class' );

if ( $check_browser['insecure'] ) {
			wp_add_dashboard_widget( 'dashboard_browser_nag', __( 'You are using an insecure browser!' ), 'wp_dashboard_browser_nag' );
		} else {
			wp_add_dashboard_widget( 'dashboard_browser_nag', __( 'Your browser is out of date!' ), 'wp_dashboard_browser_nag' );
		}
	}

// PHP Version.
	$check_php = wp_check_php_version();

if ( $check_php && current_user_can( 'update_php' ) ) {
		// If "not acceptable" the widget will be shown.
		if ( isset( $check_php['is_acceptable'] ) && ! $check_php['is_acceptable'] ) {
			add_filter( 'postbox_classes_dashboard_dashboard_php_nag', 'dashboard_php_nag_class' );

if ( $check_php['is_lower_than_future_minimum'] ) {
				wp_add_dashboard_widget( 'dashboard_php_nag', __( 'PHP Update Required' ), 'wp_dashboard_php_nag' );
			} else {
				wp_add_dashboard_widget( 'dashboard_php_nag', __( 'PHP Update Recommended' ), 'wp_dashboard_php_nag' );
			}
		}
	}

// Site Health.
	if ( current_user_can( 'view_site_health_checks' ) && ! is_network_admin() ) {
		if ( ! class_exists( 'WP_Site_Health' ) ) {
			require_once ABSPATH . 'wp-admin/includes/class-wp-site-health.php';
		}

WP_Site_Health::get_instance();

wp_enqueue_style( 'site-health' );
		wp_enqueue_script( 'site-health' );

wp_add_dashboard_widget( 'dashboard_site_health', __( 'Site Health Status' ), 'wp_dashboard_site_health' );
	}

// Right Now.
	if ( is_blog_admin() && current_user_can( 'edit_posts' ) ) {
		wp_add_dashboard_widget( 'dashboard_right_now', __( 'At a Glance' ), 'wp_dashboard_right_now' );
	}

if ( is_network_admin() ) {
		wp_add_dashboard_widget( 'network_dashboard_right_now', __( 'Right Now' ), 'wp_network_dashboard_right_now' );
	}

// Activity Widget.
	if ( is_blog_admin() ) {
		wp_add_dashboard_widget( 'dashboard_activity', __( 'Activity' ), 'wp_dashboard_site_activity' );
	}

// QuickPress Widget.
	if ( is_blog_admin() && current_user_can( get_post_type_object( 'post' )->cap->create_posts ) ) {
		$quick_draft_title = sprintf( '<span class="hide-if-no-js">%1$s</span> <span class="hide-if-js">%2$s</span>', __( 'Quick Draft' ), __( 'Your Recent Drafts' ) );
		wp_add_dashboard_widget( 'dashboard_quick_press', $quick_draft_title, 'wp_dashboard_quick_press' );
	}

// WordPress Events and News.
	wp_add_dashboard_widget( 'dashboard_primary', __( 'WordPress Events and News' ), 'wp_dashboard_events_news' );

if ( is_network_admin() ) {

/**
		 * Fires after core widgets for the Network Admin dashboard have been registered.
		 *
		 * @since 3.1.0
		 */
		do_action( 'wp_network_dashboard_setup' );

/**
		 * Filters the list of widgets to load for the Network Admin dashboard.
		 *
		 * @since 3.1.0
		 *
		 * @param string[] $dashboard_widgets An array of dashboard widget IDs.
		 */
		$dashboard_widgets = apply_filters( 'wp_network_dashboard_widgets', array() );
	} elseif ( is_user_admin() ) {

/**
		 * Fires after core widgets for the User Admin dashboard have been registered.
		 *
		 * @since 3.1.0
		 */
		do_action( 'wp_user_dashboard_setup' );

/**
		 * Filters the list of widgets to load for the User Admin dashboard.
		 *
		 * @since 3.1.0
		 *
		 * @param string[] $dashboard_widgets An array of dashboard widget IDs.
		 */
		$dashboard_widgets = apply_filters( 'wp_user_dashboard_widgets', array() );
	} else {

/**
		 * Fires after core widgets for the admin dashboard have been registered.
		 *
		 * @since 2.5.0
		 */
		do_action( 'wp_dashboard_setup' );

/**
		 * Filters the list of widgets to load for the admin dashboard.
		 *
		 * @since 2.5.0
		 *
		 * @param string[] $dashboard_widgets An array of dashboard widget IDs.
		 */
		$dashboard_widgets = apply_filters( 'wp_dashboard_widgets', array() );
	}

foreach ( $dashboard_widgets as $widget_id ) {
		$name = empty( $wp_registered_widgets[ $widget_id ]['all_link'] ) ? $wp_registered_widgets[ $widget_id ]['name'] : $wp_registered_widgets[ $widget_id ]['name'] . " <a href='{$wp_registered_widgets[$widget_id]['all_link']}' class='edit-box open-box'>" . __( 'View all' ) . '</a>';
		wp_add_dashboard_widget( $widget_id, $name, $wp_registered_widgets[ $widget_id ]['callback'], $wp_registered_widget_controls[ $widget_id ]['callback'] );
	}

if ( 'POST' === $_SERVER['REQUEST_METHOD'] && isset( $_POST['widget_id'] ) ) {
		check_admin_referer( 'edit-dashboard-widget_' . $_POST['widget_id'], 'dashboard-widget-nonce' );
		ob_start(); // Hack - but the same hack wp-admin/widgets.php uses.
		wp_dashboard_trigger_widget_control( $_POST['widget_id'] );
		ob_end_clean();
		wp_redirect( remove_query_arg( 'edit' ) );
		exit;
	}

/** This action is documented in wp-admin/includes/meta-boxes.php */
	do_action( 'do_meta_boxes', $screen->id, 'normal', '' );

/** This action is documented in wp-admin/includes/meta-boxes.php */
	do_action( 'do_meta_boxes', $screen->id, 'side', '' );
}

/**
 * Adds a new dashboard widget.
 *
 * @since 2.7.0
 * @since 5.6.0 The `$context` and `$priority` parameters were added.
 *
 * @global callable[] $wp_dashboard_control_callbacks
 *
 * @param string   $widget_id        Widget ID  (used in the 'id' attribute for the widget).
 * @param string   $widget_name      Title of the widget.
 * @param callable $callback         Function that fills the widget with the desired content.
 *                                   The function should echo its output.
 * @param callable $control_callback Optional. Function that outputs controls for the widget. Default null.
 * @param array    $callback_args    Optional. Data that should be set as the $args property of the widget array
 *                                   (which is the second parameter passed to your callback). Default null.
 * @param string   $context          Optional. The context within the screen where the box should display.
 *                                   Accepts 'normal', 'side', 'column3', or 'column4'. Default 'normal'.
 * @param string   $priority         Optional. The priority within the context where the box should show.
 *                                   Accepts 'high', 'core', 'default', or 'low'. Default 'core'.
 */
function wp_add_dashboard_widget( $widget_id, $widget_name, $callback, $control_callback = null, $callback_args = null, $context = 'normal', $priority = 'core' ) {
	global $wp_dashboard_control_callbacks;

$screen = get_current_screen();

$private_callback_args = array( '__widget_basename' => $widget_name );

if ( is_null( $callback_args ) ) {
		$callback_args = $private_callback_args;
	} elseif ( is_array( $callback_args ) ) {
		$callback_args = array_merge( $callback_args, $private_callback_args );
	}

if ( $control_callback && is_callable( $control_callback ) && current_user_can( 'edit_dashboard' ) ) {
		$wp_dashboard_control_callbacks[ $widget_id ] = $control_callback;

if ( isset( $_GET['edit'] ) && $widget_id === $_GET['edit'] ) {
			list($url)    = explode( '#', add_query_arg( 'edit', false ), 2 );
			$widget_name .= ' <span class="postbox-title-action"><a href="' . esc_url( $url ) . '">' . __( 'Cancel' ) . '</a></span>';
			$callback     = '_wp_dashboard_control_callback';
		} else {
			list($url)    = explode( '#', add_query_arg( 'edit', $widget_id ), 2 );
			$widget_name .= ' <span class="postbox-title-action"><a href="' . esc_url( "$url#$widget_id" ) . '" class="edit-box open-box">' . __( 'Configure' ) . '</a></span>';
		}
	}

$side_widgets = array( 'dashboard_quick_press', 'dashboard_primary' );

if ( in_array( $widget_id, $side_widgets, true ) ) {
		$context = 'side';
	}

$high_priority_widgets = array( 'dashboard_browser_nag', 'dashboard_php_nag' );

if ( in_array( $widget_id, $high_priority_widgets, true ) ) {
		$priority = 'high';
	}

if ( empty( $context ) ) {
		$context = 'normal';
	}

if ( empty( $priority ) ) {
		$priority = 'core';
	}

add_meta_box( $widget_id, $widget_name, $callback, $screen, $context, $priority, $callback_args );
}

/**
 * Outputs controls for the current dashboard widget.
 *
 * @access private
 * @since 2.7.0
 *
 * @param mixed $dashboard
 * @param array $meta_box
 */
function _wp_dashboard_control_callback( $dashboard, $meta_box ) {
	echo '<form method="post" class="dashboard-widget-control-form wp-clearfix">';
	wp_dashboard_trigger_widget_control( $meta_box['id'] );
	wp_nonce_field( 'edit-dashboard-widget_' . $meta_box['id'], 'dashboard-widget-nonce' );
	echo '<input type="hidden" name="widget_id" value="' . esc_attr( $meta_box['id'] ) . '" />';
	submit_button( __( 'Save Changes' ) );
	echo '</form>';
}

/**
 * Displays the dashboard.
 *
 * @since 2.5.0
 */
function wp_dashboard() {
	$screen      = get_current_screen();
	$columns     = absint( $screen->get_columns() );
	$columns_css = '';

if ( $columns ) {
		$columns_css = " columns-$columns";
	}
	?>
<div id="dashboard-widgets" class="metabox-holder<?php echo $columns_css; ?>">
	<div id="postbox-container-1" class="postbox-container">
	<?php do_meta_boxes( $screen->id, 'normal', '' ); ?>
	</div>
	<div id="postbox-container-2" class="postbox-container">
	<?php do_meta_boxes( $screen->id, 'side', '' ); ?>
	</div>
	<div id="postbox-container-3" class="postbox-container">
	<?php do_meta_boxes( $screen->id, 'column3', '' ); ?>
	</div>
	<div id="postbox-container-4" class="postbox-container">
	<?php do_meta_boxes( $screen->id, 'column4', '' ); ?>
	</div>
</div>

<?php
	wp_nonce_field( 'closedpostboxes', 'closedpostboxesnonce', false );
	wp_nonce_field( 'meta-box-order', 'meta-box-order-nonce', false );
}

//
// Dashboard Widgets.
//

/**
 * Dashboard widget that displays some basic stats about the site.
 *
 * Formerly 'Right Now'. A streamlined 'At a Glance' as of 3.8.
 *
 * @since 2.7.0
 */
function wp_dashboard_right_now() {
	?>
	<div class="main">
	<ul>
	<?php
	// Posts and Pages.
	foreach ( array( 'post', 'page' ) as $post_type ) {
		$num_posts = wp_count_posts( $post_type );

if ( $num_posts && $num_posts->publish ) {
			if ( 'post' === $post_type ) {
				/* translators: %s: Number of posts. */
				$text = _n( '%s Post', '%s Posts', $num_posts->publish );
			} else {
				/* translators: %s: Number of pages. */
				$text = _n( '%s Page', '%s Pages', $num_posts->publish );
			}

$text             = sprintf( $text, number_format_i18n( $num_posts->publish ) );
			$post_type_object = get_post_type_object( $post_type );

if ( $post_type_object && current_user_can( $post_type_object->cap->edit_posts ) ) {
				printf( '<li class="%1$s-count"><a href="edit.php?post_type=%1$s">%2$s</a></li>', $post_type, $text );
			} else {
				printf( '<li class="%1$s-count"><span>%2$s</span></li>', $post_type, $text );
			}
		}
	}

// Comments.
	$num_comm = wp_count_comments();

if ( $num_comm && ( $num_comm->approved || $num_comm->moderated ) ) {
		/* translators: %s: Number of comments. */
		$text = sprintf( _n( '%s Comment', '%s Comments', $num_comm->approved ), number_format_i18n( $num_comm->approved ) );
		?>
		<li class="comment-count">
			<a href="edit-comments.php"><?php echo $text; ?></a>
		</li>
		<?php
		$moderated_comments_count_i18n = number_format_i18n( $num_comm->moderated );
		/* translators: %s: Number of comments. */
		$text = sprintf( _n( '%s Comment in moderation', '%s Comments in moderation', $num_comm->moderated ), $moderated_comments_count_i18n );
		?>
		<li class="comment-mod-count<?php echo ! $num_comm->moderated ? ' hidden' : ''; ?>">
			<a href="edit-comments.php?comment_status=moderated" class="comments-in-moderation-text"><?php echo $text; ?></a>
		</li>
		<?php
	}

/**
	 * Filters the array of extra elements to list in the 'At a Glance'
	 * dashboard widget.
	 *
	 * Prior to 3.8.0, the widget was named 'Right Now'. Each element
	 * is wrapped in list-item tags on output.
	 *
	 * @since 3.8.0
	 *
	 * @param string[] $items Array of extra 'At a Glance' widget items.
	 */
	$elements = apply_filters( 'dashboard_glance_items', array() );

if ( $elements ) {
		echo '<li>' . implode( "</li>\n<li>", $elements ) . "</li>\n";
	}

?>
	</ul>
	<?php
	update_right_now_message();

// Check if search engines are asked not to index this site.
	if ( ! is_network_admin() && ! is_user_admin()
		&& current_user_can( 'manage_options' ) && ! get_option( 'blog_public' )
	) {

/**
		 * Filters the link title attribute for the 'Search engines discouraged'
		 * message displayed in the 'At a Glance' dashboard widget.
		 *
		 * Prior to 3.8.0, the widget was named 'Right Now'.
		 *
		 * @since 3.0.0
		 * @since 4.5.0 The default for `$title` was updated to an empty string.
		 *
		 * @param string $title Default attribute text.
		 */
		$title = apply_filters( 'privacy_on_link_title', '' );

/**
		 * Filters the link label for the 'Search engines discouraged' message
		 * displayed in the 'At a Glance' dashboard widget.
		 *
		 * Prior to 3.8.0, the widget was named 'Right Now'.
		 *
		 * @since 3.0.0
		 *
		 * @param string $content Default text.
		 */
		$content = apply_filters( 'privacy_on_link_text', __( 'Search engines discouraged' ) );

$title_attr = '' === $title ? '' : " title='$title'";

echo "<p class='search-engines-info'><a href='options-reading.php'$title_attr>$content</a></p>";
	}
	?>
	</div>
	<?php
	/*
	 * activity_box_end has a core action, but only prints content when multisite.
	 * Using an output buffer is the only way to really check if anything's displayed here.
	 */
	ob_start();

/**
	 * Fires at the end of the 'At a Glance' dashboard widget.
	 *
	 * Prior to 3.8.0, the widget was named 'Right Now'.
	 *
	 * @since 2.5.0
	 */
	do_action( 'rightnow_end' );

/**
	 * Fires at the end of the 'At a Glance' dashboard widget.
	 *
	 * Prior to 3.8.0, the widget was named 'Right Now'.
	 *
	 * @since 2.0.0
	 */
	do_action( 'activity_box_end' );

$actions = ob_get_clean();

if ( ! empty( $actions ) ) :
		?>
	<div class="sub">
		<?php echo $actions; ?>
	</div>
		<?php
	endif;
}

/**
 * @since 3.1.0
 */
function wp_network_dashboard_right_now() {
	$actions = array();

if ( current_user_can( 'create_sites' ) ) {
		$actions['create-site'] = '<a href="' . network_admin_url( 'site-new.php' ) . '">' . __( 'Create a New Site' ) . '</a>';
	}
	if ( current_user_can( 'create_users' ) ) {
		$actions['create-user'] = '<a href="' . network_admin_url( 'user-new.php' ) . '">' . __( 'Create a New User' ) . '</a>';
	}

$c_users = get_user_count();
	$c_blogs = get_blog_count();

/* translators: %s: Number of users on the network. */
	$user_text = sprintf( _n( '%s user', '%s users', $c_users ), number_format_i18n( $c_users ) );
	/* translators: %s: Number of sites on the network. */
	$blog_text = sprintf( _n( '%s site', '%s sites', $c_blogs ), number_format_i18n( $c_blogs ) );

/* translators: 1: Text indicating the number of sites on the network, 2: Text indicating the number of users on the network. */
	$sentence = sprintf( __( 'You have %1$s and %2$s.' ), $blog_text, $user_text );

if ( $actions ) {
		echo '<ul class="subsubsub">';
		foreach ( $actions as $class => $action ) {
			$actions[ $class ] = "\t<li class='$class'>$action";
		}
		echo implode( " |</li>\n", $actions ) . "</li>\n";
		echo '</ul>';
	}
	?>
	<br class="clear" />

<?php
		/**
		 * Fires in the Network Admin 'Right Now' dashboard widget
		 * just before the user and site search form fields.
		 *
		 * @since MU (3.0.0)
		 */
		do_action( 'wpmuadminresult' );
	?>

<form action="<?php echo esc_url( network_admin_url( 'users.php' ) ); ?>" method="get">
		<p>
			<label class="screen-reader-text" for="search-users">
				<?php