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<?php
/**
 * Module Name: Jetpack Stats
 * Module Description: Clear, concise traffic insights right in your WordPress dashboard.
 * Sort Order: 1
 * Recommendation Order: 2
 * First Introduced: 1.1
 * Requires Connection: Yes
 * Auto Activate: Yes
 * Module Tags: Jetpack Stats, Site Stats, Recommended
 * Feature: Engagement
 * Additional Search Queries: statistics, tracking, analytics, views, traffic, stats
 *
 * @package automattic/jetpack
 */

use Automattic\Jetpack\Admin_UI\Admin_Menu;
use Automattic\Jetpack\Connection\Client;
use Automattic\Jetpack\Redirect;
use Automattic\Jetpack\Stats\Main as Stats;
use Automattic\Jetpack\Stats\Options as Stats_Options;
use Automattic\Jetpack\Stats\Tracking_Pixel as Stats_Tracking_Pixel;
use Automattic\Jetpack\Stats\WPCOM_Stats;
use Automattic\Jetpack\Stats\XMLRPC_Provider as Stats_XMLRPC;
use Automattic\Jetpack\Stats_Admin\Admin_Post_List_Column;
use Automattic\Jetpack\Stats_Admin\Dashboard as Stats_Dashboard;
use Automattic\Jetpack\Stats_Admin\Main as Stats_Main;
use Automattic\Jetpack\Status\Host;
use Automattic\Jetpack\Tracking;

if ( ! defined( 'ABSPATH' ) ) {
	exit( 0 );
}

if ( defined( 'STATS_DASHBOARD_SERVER' ) ) {
	return;
}

define( 'STATS_DASHBOARD_SERVER', 'dashboard.wordpress.com' );

/**
 * Stats content markers.
 * Used to test for content vs script when parsing server-generated HTML.
 */
const STATS_BODY_MARKER    = '<div id="statchart"';
const STATS_CONTENT_MARKER = '<div class="gotonewdash">';

add_action( 'jetpack_modules_loaded', 'stats_load' );

/**
 * Load Stats.
 *
 * @access public
 * @return void
 */
function stats_load() {
	Jetpack::enable_module_configurable( __FILE__ );

// Only run the callback for those who can see the stats.
	if ( is_user_logged_in() && current_user_can( 'view_stats' ) ) {
		add_action( 'admin_head', 'stats_admin_bar_head', 100 );
		add_action( 'wp_head', 'stats_admin_bar_head', 100 );
	}

Admin_Post_List_Column::register();

add_action( 'jetpack_admin_menu', 'stats_admin_menu' );
	add_action( 'wp_before_admin_bar_render', 'stats_add_link_to_admin_bar_site_menu' );

add_filter( 'pre_option_db_version', 'stats_ignore_db_version' );

// Filter for adding the Jetpack plugin version to tracking stats.
	add_filter( 'stats_array', 'filter_stats_array_add_jp_version' );

require_once __DIR__ . '/stats/class-jetpack-stats-upgrade-nudges.php';
	add_action( 'updating_jetpack_version', array( 'Jetpack_Stats_Upgrade_Nudges', 'unset_nudges_setting' ) );
}

/**
 * Checks if filter is set and dnt is enabled.
 *
 * @deprecated 11.5
 * @return bool
 */
function jetpack_is_dnt_enabled() {
	_deprecated_function( __METHOD__, 'jetpack-11.5', 'Automattic\Jetpack\Stats\Main::jetpack_is_dnt_enabled' );
	return Stats::jetpack_is_dnt_enabled();
}

/**
 * Prevent sparkline img requests being redirected to upgrade.php.
 * See wp-admin/admin.php where it checks $wp_db_version.
 *
 * @access public
 * @param mixed $version Version.
 * @return string $version.
 */
function stats_ignore_db_version( $version ) {
	if (
		is_admin() &&
		isset( $_GET['page'] ) && 'stats' === $_GET['page'] && // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		isset( $_GET['chart'] ) && strpos( $_GET['chart'], 'admin-bar-hours' ) === 0 // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.ValidatedSanitizedInput
	) {
		global $wp_db_version;
		return $wp_db_version;
	}
	return $version;
}

/**
 * Maps view_stats cap to read cap as needed.
 *
 * @deprecated 11.5
 *
 * @access public
 * @param mixed $caps Caps.
 * @param mixed $cap Cap.
 * @param mixed $user_id User ID.
 * @return array Possibly mapped capabilities for meta capability.
 */
function stats_map_meta_caps( $caps, $cap, $user_id ) {
	_deprecated_function( __METHOD__, 'jetpack-11.5', 'Automattic\Jetpack\Stats\Main::map_meta_caps' );
	return Stats::map_meta_caps( $caps, $cap, $user_id );
}

/**
 * Stats Template Redirect.
 *
 * @deprecated 11.5
 * @access public
 * @return void
 */
function stats_template_redirect() {
	_deprecated_function( __METHOD__, 'jetpack-11.5', 'Automattic\Jetpack\Stats\Main::template_redirect' );
	Stats::template_redirect();
}

/**
 * Stats Build View Data.
 *
 * @deprecated 11.5
 * @access public
 * @return array
 */
function stats_build_view_data() {
	_deprecated_function( __METHOD__, 'jetpack-11.5', 'Automattic\Jetpack\Stats\Tracking_Pixel::build_view_data' );
	return Stats_Tracking_Pixel::build_view_data();
}

/**
 * Stats Get Options.
 *
 * @deprecated 11.5
 *
 * @access public
 * @return array
 */
function stats_get_options() {
	_deprecated_function( __METHOD__, 'jetpack-11.5', 'Automattic\Jetpack\Stats\Options::get_options' );
	return Stats_Options::get_options();
}

/**
 * Get Stats Options.
 *
 * @deprecated 11.5
 *
 * @access public
 * @param mixed $option Option.
 * @return mixed|null
 */
function stats_get_option( $option ) {
	_deprecated_function( __METHOD__, 'jetpack-11.5', 'Automattic\Jetpack\Stats\Options::get_option' );
	return Stats_Options::get_option( $option );
}

/**
 * Stats Set Options.
 *
 * @deprecated 11.5
 *
 * @access public
 * @param mixed $option Option.
 * @param mixed $value Value.
 * @return bool
 */
function stats_set_option( $option, $value ) {
	_deprecated_function( __METHOD__, 'jetpack-11.5', 'Automattic\Jetpack\Stats\Options::set_option' );
	return Stats_Options::set_option( $option, $value );
}

/**
 * Stats Set Options.
 *
 * @deprecated 11.5
 *
 * @access public
 * @param mixed $options Options.
 * @return bool
 */
function stats_set_options( $options ) {
	_deprecated_function( __METHOD__, 'jetpack-11.5', 'Automattic\Jetpack\Stats\Options::set_options' );
	return Stats_Options::set_options( $options );
}

/**
 * Stats Upgrade Options.
 *
 * @deprecated 11.5
 *
 * @access public
 * @param mixed $options Options.
 * @return array|bool
 */
function stats_upgrade_options( $options ) {
	_deprecated_function( __METHOD__, 'jetpack-11.5', 'Automattic\Jetpack\Stats\Options::upgrade_options' );
	return Stats_Options::upgrade_options( $options );
}

/**
 * Admin Pages.
 *
 * @access public
 * @return void
 */
function stats_admin_menu() {
	global $pagenow;

// If we're at an old Stats URL, redirect to the new one.
	// Don't even bother with caps, menu_page_url(), etc.  Just do it.
	if ( 'index.php' === $pagenow && isset( $_GET['page'] ) && 'stats' === $_GET['page'] ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		$redirect_url = str_replace( array( '/wp-admin/index.php?', '/wp-admin/?' ), '/wp-admin/admin.php?', isset( $_SERVER['REQUEST_URI'] ) ? filter_var( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : null );
		$relative_pos = strpos( $redirect_url, '/wp-admin/' );
		if ( false !== $relative_pos ) {
			wp_safe_redirect( admin_url( substr( $redirect_url, $relative_pos + 10 ) ) );
			exit( 0 );
		}
	}

// phpcs:ignore WordPress.Security.NonceVerification.Recommended
	if ( ! ( new Host() )->is_woa_site() && isset( $_GET['enable_new_stats'] ) && '1' === $_GET['enable_new_stats'] ) {
		// Passing true enables Odyssey Stats.
		// We're ignorning the return value for now.
		Stats_Main::update_new_stats_status( true );
	}

// phpcs:ignore WordPress.Security.NonceVerification.Recommended
	if ( ! Stats_Options::get_option( 'enable_odyssey_stats' ) || isset( $_GET['noheader'] ) ) {
		// Show old Jetpack Stats interface for:
		// - When the "enable_odyssey_stats" option is disabled.
		// - When being shown in the adminbar outside of wp-admin.
		$hook = Admin_Menu::add_menu( __( 'Stats', 'jetpack' ), __( 'Stats', 'jetpack' ), 'view_stats', 'stats', 'jetpack_admin_ui_stats_report_page_wrapper' );
		add_action( "load-$hook", 'stats_reports_load' );
	} else {
		// Enable the new Odyssey Stats experience.
		Stats_Dashboard::init();
	}
}

/**
 * Stats Admin Path.
 *
 * @access public
 * @return string
 */
function stats_admin_path() {
	return Jetpack::module_configuration_url( __FILE__ );
}

/**
 * Stats Reports Load.
 *
 * @access public
 * @return void
 */
function stats_reports_load() {
	require_once __DIR__ . '/stats/class-jetpack-stats-upgrade-nudges.php';
	Jetpack_Stats_Upgrade_Nudges::init();

wp_enqueue_script( 'jquery' );
	wp_enqueue_script( 'postbox' );
	wp_enqueue_script( 'underscore' );

Jetpack_Admin_Page::load_wrapper_styles();
	add_action( 'admin_print_styles', 'stats_reports_css' );

if ( ! empty( $_GET['nojs'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		$parsed = wp_parse_url( admin_url() );
		// Remember user doesn't want JS.
		setcookie( 'stnojs', '1', time() + 172800, $parsed['path'], COOKIE_DOMAIN, is_ssl(), true ); // 2 days.
	}

if ( ! empty( $_COOKIE['stnojs'] ) ) {
		// Detect if JS is on.  If so, remove cookie so next page load is via JS.
		add_action( 'admin_print_footer_scripts', 'stats_js_remove_stnojs_cookie' );
	} elseif ( ! isset( $_GET['noheader'] ) && empty( $_GET['nojs'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		// Normal page load.  Load page content via JS.
		add_action( 'admin_print_footer_scripts', 'stats_script_dismiss_nudge_handler' );
	}
}

/**
 * JavaScript to dismiss the Odyssey nudge.
 *
 * @access public
 * @return void
 */
function stats_script_dismiss_nudge_handler() {
	?>
	<script type="text/javascript">
	function stats_odyssey_dismiss_nudge() {
		// Hide the nudge UI, effectively dismissing it.
		var element = document.getElementById( "stats-odyssey-nudge-main" );
		element.classList.toggle( "is-hidden" );
		// Send an AJAX request.
		// Note we can provide a 'postponed_for' parameter to set the delay.
		// Without a parameter it defaults to 30 days which is what we want here.
		let nonce = <?php echo wp_json_encode( wp_create_nonce( 'wp_rest' ), JSON_UNESCAPED_SLASHES | JSON_HEX_TAG | JSON_HEX_AMP ); ?>;
		let url = <?php echo wp_json_encode( rest_url( '/jetpack/v4/stats-app/stats/notices' ), JSON_UNESCAPED_SLASHES | JSON_HEX_TAG | JSON_HEX_AMP ); ?>;
		let data = {
			id: 'opt_in_new_stats',
			status: 'postponed',
		};
		jQuery.ajax({
			type: "POST",
			url: url,
			data: data,
			headers: { "x-wp-nonce": nonce },
		});
	}
	</script>
	<?php
}

/**
 * Stats Reports CSS.
 *
 * @access public
 * @return void
 */
function stats_reports_css() {
	?>
<style type="text/css">
#jp-stats-wrap, #jp-stats-report-bottom {
	max-width: 1040px;
	margin: 0 auto;
	overflow: hidden;
}
</style>
	<?php
}

/**
 * Detect if JS is on.  If so, remove cookie so next page load is via JS.
 *
 * @access public
 * @return void
 */
function stats_js_remove_stnojs_cookie() {
	$parsed = wp_parse_url( admin_url() );
	?>
<script type="text/javascript">
/* <![CDATA[ */
document.cookie = <?php echo wp_json_encode( 'stnojs=0; expires=Wed, 9 Mar 2011 16:55:50 UTC; path=' . $parsed['path'], JSON_UNESCAPED_SLASHES | JSON_HEX_TAG ); ?>;
/* ]]> */
</script>
	<?php
}

/**
 * Jetpack Admin Page Wrapper.
 */
function jetpack_admin_ui_stats_report_page_wrapper() {
	if ( ! isset( $_GET['noheader'] ) && empty( $_GET['nojs'] ) && empty( $_COOKIE['stnojs'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		Jetpack_Admin_Page::wrap_ui( 'stats_reports_page', array( 'is-wide' => true ) );
	} else {
		stats_reports_page();
	}
}

/**
 * Stats Report Page.
 *
 * @access public
 * @param bool $main_chart_only (default: false) Main Chart Only.
 */
function stats_reports_page( $main_chart_only = false ) {
	if ( isset( $_GET['dashboard'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		stats_dashboard_widget_content();
		exit( 0 ); // @phan-suppress-current-line PhanPluginUnreachableCode -- Safer to include it even though stats_dashboard_widget_content() never returns.
	}

$blog_id               = Stats_Options::get_option( 'blog_id' );
	$learn_url             = Redirect::get_url( 'jetpack-stats-learn-more' );
	$redirect_url          = admin_url( 'admin.php?page=stats&enable_new_stats=1' );
	$stats_bg_url          = plugins_url( 'images/odyssey-upgrade/background.png', JETPACK__PLUGIN_FILE );
	$stats_bg_gradient_url = plugins_url( 'images/odyssey-upgrade/gradient.png', JETPACK__PLUGIN_FILE );

if ( ! $main_chart_only && ! isset( $_GET['noheader'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		?>

border: 1px solid var( --jp-gray-5 );
			border-left-color: var( --jp-black );
			border-left-width: 6px;
			border-radius: 4px;

margin-top: 24px;
			background: white;
			position: relative;
		}
		.stats-odyssey-notice--content__highlighted {
			border-left-color: var( --jp-red );
		}
		.stats-odyssey-notice--content {
			padding: 24px 0 24px 30px;
			font-size: 2em;
			width: 100%;
		}
		.stats-odyssey-notice--content-header {
			font-size: 24px;
			line-height: 32px;
			margin: 0;
			margin-bottom: 8px;
		}
		.stats-odyssey-notice--content-text {
			font-size: 16px;
			margin: 0;
		}
		.stats-odyssey-notice--image-container {
			background-image: url("<?php echo esc_url( $stats_bg_url ); ?>"), url("<?php echo esc_url( $stats_bg_gradient_url ); ?>");
			background-size: cover;
			padding-right: 28px;
			width: 100%;
		}
		.stats-odyssey-notice--close-button {
			position: absolute;
			top: 1rem;
			right: 1rem;
			background-color: transparent;
			border: none;
			cursor: pointer;
		}
		.stats-odyssey-notice--action-bar {
			display: flex;
			align-items: center;
			margin-top: 24px;
		}
		.stats-odyssey-notice--primary-button {
			margin-right: 18px;
			padding-left: 20px;
			padding-right: 20px;
			font-size: 16px;
			border-color: black;
			background-color: black;
		}
		.stats-odyssey-notice--primary-button:hover {
			border-color: #3c434a;
			background-color: #3c434a;
		}
		.is-primary-link {
			color: white;
			text-decoration: none;
		}
		.is-primary-link:active {
			color: white;
		}
		.is-primary-link:focus {
			color: white;
			box-shadow: none;
			outline: none;
		}
		.is-primary-link:hover {
			color: white;
		}
		.is-secondary-link {
			color: black;
			font-size: var( --font-body );
		}
		.is-secondary-link:hover {
			color: black;
		}
		.is-hidden {
			display: none;
		}
	</style>
	<div id="jp-stats-wrap">
		<div class="wrap">
			<h1><?php esc_html_e( 'Jetpack Stats', 'jetpack' ); ?>
			<?php
			if ( current_user_can( 'jetpack_manage_modules' ) ) :
				$i18n_headers = jetpack_get_module_i18n( 'stats' );
				?>
				<a
					style="font-size:13px;"
					href="<?php echo esc_url( admin_url( 'admin.php?page=jetpack#/settings?term=' . rawurlencode( $i18n_headers['name'] ?? '' ) ) ); ?>"
				>
				<?php esc_html_e( 'Configure', 'jetpack' ); ?>
				</a>
				<?php
				endif;

?>
			</h2>
		</div>
		<div class="wrap">
			<div class="stats-odyssey-notice stats-odyssey-notice--content__highlighted">
				<div class="stats-odyssey-notice--content">
					<h2 class="stats-odyssey-notice--content-header"><?php esc_html_e( 'Deprecated Jetpack Stats Experience', 'jetpack' ); ?></h2>
					<p class="stats-odyssey-notice--content-text"><?php esc_html_e( 'The old Jetpack Stats has been deprecated. Please click the button to enable the new experience.', 'jetpack' ); ?></p>
					<div class="stats-odyssey-notice--action-bar">
						<button class="dops-button stats-odyssey-notice--primary-button">
							<a class="is-primary-link" href="<?php echo esc_url( $redirect_url ); ?>"><?php esc_html_e( 'Switch to new Stats', 'jetpack' ); ?></a>
						</button>
						<a class="is-secondary-link" href="<?php echo esc_url( $learn_url ); ?>" rel="noopener noreferrer" target="_blank"><?php esc_html_e( 'Learn about Stats', 'jetpack' ); ?> <svg xmlns="http://www.w3.org/2000/svg" style="vertical-align: middle;" viewBox="0 0 24 24" width="16" height="16" aria-hidden="true" focusable="false"><path d="M18.2 17c0 .7-.6 1.2-1.2 1.2H7c-.7 0-1.2-.6-1.2-1.2V7c0-.7.6-1.2 1.2-1.2h3.2V4.2H7C5.5 4.2 4.2 5.5 4.2 7v10c0 1.5 1.2 2.8 2.8 2.8h10c1.5 0 2.8-1.2 2.8-2.8v-3.6h-1.5V17zM14.9 3v1.5h3.7l-6.4 6.4 1.1 1.1 6.4-6.4v3.7h1.5V3h-6.3z"></path></svg></a>
					</div>
				</div>
				<div class="stats-odyssey-notice--image-container"></div>
			</div>
		</div>
		<p></p>
	</div>
		<?php
		return;
	}

$day = isset( $_GET['day'] ) && preg_match( '/^\d{4}-\d{2}-\d{2}$/', $_GET['day'] ) ? $_GET['day'] : false; // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.ValidatedSanitizedInput
	$q   = array(
		'noheader' => 'true',
		'proxy'    => '',
		'page'     => 'stats',
		'day'      => $day,
		'blog'     => $blog_id,
		'charset'  => get_option( 'blog_charset' ),
		'color'    => get_user_option( 'admin_color' ),
		'ssl'      => is_ssl(),
		'j'        => sprintf( '%s:%s', JETPACK__API_VERSION, JETPACK__VERSION ),
	);
	if ( get_locale() !== 'en_US' ) {
		$q['jp_lang'] = get_locale();
	}
	// Only show the main chart, without extra header data, or metaboxes.
	$q['main_chart_only'] = $main_chart_only;
	$args                 = array(
		'view'                => array( 'referrers', 'postviews', 'searchterms', 'clicks', 'post', 'table' ),
		'numdays'             => 'int',
		'day'                 => 'date',
		'unit'                => array( '1', '7', '31', 'human' ),
		'humanize'            => array( 'true' ),
		'num'                 => 'int',
		'summarize'           => null,
		'post'                => 'int',
		'width'               => 'int',
		'height'              => 'int',
		'data'                => 'data',
		'blog_subscribers'    => 'int',
		'comment_subscribers' => null,
		'type'                => array( 'wpcom', 'email', 'pending' ),
		'pagenum'             => 'int',
		'masterbar'           => null,
	);
	foreach ( $args as $var => $vals ) {
		if ( ! isset( $_REQUEST[ $var ] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			continue;
		}
		$val = wp_unslash( $_REQUEST[ $var ] ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
		if ( is_array( $vals ) ) {
			if ( in_array( $val, $vals, true ) ) {
				$q[ $var ] = $val;
			}
		} elseif ( 'int' === $vals ) {
			$q[ $var ] = (int) $val;
		} elseif ( 'date' === $vals ) {
			if ( preg_match( '/^\d{4}-\d{2}-\d{2}$/', $val ) ) {
				$q[ $var ] = $val;
			}
		} elseif ( null === $vals ) {
			$q[ $var ] = '';
		} elseif ( 'data' === $vals ) {
			if ( str_starts_with( $val, 'index.php' ) ) {
				$q[ $var ] = $val;
			}
		}
	}

$url = 'https://' . STATS_DASHBOARD_SERVER . '/wp-admin/index.php';
	if ( isset( $_GET['chart'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		if ( preg_match( '/^[a-z0-9-]+$/', $_GET['chart'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.ValidatedSanitizedInput
			$chart = sanitize_title( $_GET['chart'] ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.ValidatedSanitizedInput
			$url   = 'https://' . STATS_DASHBOARD_SERVER . "/wp-includes/charts/{$chart}.php";
		}
	}

$url     = add_query_arg( $q, $url );
	$method  = 'GET';
	$timeout = 90;
	$user_id = 0; // Means use the blog token.

$get      = Client::remote_request( compact( 'url', 'method', 'timeout', 'user_id' ) );
	$get_code = wp_remote_retrieve_response_code( $get );
	if ( is_wp_error( $get ) || $get_code === '' || ( 2 !== (int) ( $get_code / 100 ) && 304 !== $get_code ) || empty( $get['body'] ) ) {
		stats_print_wp_remote_error( $get, $url );
	} elseif ( ! empty( $get['headers']['content-type'] ) ) {
		$type = $get['headers']['content-type'];
		if ( str_starts_with( $type, 'image' ) ) {
			$img = $get['body'];
			header( 'Content-Type: ' . $type );
			header( 'Content-Length: ' . strlen( $img ) );
			echo $img; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
			die( 0 );
		}
	}

if ( isset( $_GET['page'] ) && 'stats' === $_GET['page'] && ! isset( $_GET['chart'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		$tracking = new Tracking();
		$tracking->record_user_event( 'wpa_page_view', array( 'path' => 'old_stats' ) );
	}

if ( isset( $_GET['noheader'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		die( 0 );
	}
}

/**
 * Stats Convert Image URLs.
 *
 * @access public
 * @param mixed $html HTML.
 * @return string
 */
function stats_convert_image_urls( $html ) {
	$url  = set_url_scheme( 'https://' . STATS_DASHBOARD_SERVER );
	$html = preg_replace( '|(["\'])(/i/stats.+)\\1|', '$1' . $url . '$2$1', $html );
	return $html;
}

/**
 * Callback for preg_replace_callback used in stats_convert_chart_urls()
 *
 * @since 5.6.0
 *
 * @param  array $matches The matches resulting from the preg_replace_callback call.
 * @return string          The admin url for the chart.
 */
function jetpack_stats_convert_chart_urls_callback( $matches ) {
	// If there is a query string, change the beginning '?' to a '&' so it fits into the middle of this query string.
	return 'admin.php?page=stats&noheader&chart=' . $matches[1] . str_replace( '?', '&', $matches[2] );
}

/**
 * Stats Convert Chart URLs.
 *
 * @access public
 * @param mixed $html HTML.
 * @return string
 */
function stats_convert_chart_urls( $html ) {
	$html = preg_replace_callback(
		'|https?://[-.a-z0-9]+/wp-includes/charts/([-.a-z0-9]+).php(\??)|',
		'jetpack_stats_convert_chart_urls_callback',
		$html
	);
	return $html;
}

/**
 * Stats Convert Post Title HTML
 *
 * @access public
 * @param mixed $html HTML.
 * @return string
 */
function stats_convert_post_titles( $html ) {
	global $stats_posts;
	$pattern = "<span class='post-(\d+)-link'>.*?</span>";
	if ( ! preg_match_all( "!$pattern!", $html, $matches ) ) {
		return $html;
	}
	$posts = get_posts(
		array(
			'include'          => implode( ',', $matches[1] ),
			'post_type'        => 'any',
			'post_status'      => 'any',
			'numberposts'      => -1,
			'suppress_filters' => false,
		)
	);
	foreach ( $posts as $post ) {
		$stats_posts[ $post->ID ] = $post;
	}
	$html = preg_replace_callback( "!$pattern!", 'stats_convert_post_title', $html );
	return $html;
}

/**
 * Stats Convert Post Title Matches.
 *
 * @access public
 * @param mixed $matches Matches.
 * @return string
 */
function stats_convert_post_title( $matches ) {
	global $stats_posts;
	$post_id = $matches[1];
	if ( isset( $stats_posts[ $post_id ] ) ) {
		return '<a href="' . get_permalink( $post_id ) . '" target="_blank">' . get_the_title( $post_id ) . '</a>';
	}
	return $matches[0];
}

/**
 * CSS to hide the tracking pixel smiley.
 * It is now hidden for everyone (used to be visible if you had set the hide_smile option).
 *
 * @access public
 * @return void
 */
function stats_hide_smile_css() {
	?>
<style>img#wpstats{display:none}</style>
	<?php
}

/**
 * Stats Admin Bar Head.
 *
 * @access public
 * @return void
 */
function stats_admin_bar_head() {
	// Let's not show the stats admin bar to users who are not logged in.
	if ( ! is_user_logged_in() ) {
		return;
	}

if ( ! Stats_Options::get_option( 'admin_bar' ) ) {
		return;
	}

if ( ! current_user_can( 'view_stats' ) ) {
		return;
	}

if ( ! is_admin_bar_showing() ) {
		return;
	}

add_action( 'admin_bar_menu', 'stats_admin_bar_menu', 100 );
	?>

/**
 * Gets the image source of the given stats chart.
 *
 * @param string $chart Name of the chart.
 * @param array  $args Extra list of argument to use in the image source.
 * @return string An image source.
 */
function stats_get_image_chart_src( $chart, $args = array() ) {
	$url = add_query_arg( 'page', 'stats', admin_url( 'admin.php' ) );

return add_query_arg(
		array_merge(
			array(
				'noheader' => '',
				'proxy'    => '',
				'chart'    => $chart,
			),
			$args
		),
		$url
	);
}

/**
 * Stats AdminBar.
 *
 * @access public
 * @param mixed $wp_admin_bar WPAdminBar.
 * @return void
 */
function stats_admin_bar_menu( &$wp_admin_bar ) {
	$img_src    = esc_attr( stats_get_image_chart_src( 'admin-bar-hours-scale' ) );
	$img_src_2x = esc_attr( stats_get_image_chart_src( 'admin-bar-hours-scale-2x' ) );
	$alt        = esc_attr( __( 'Stats', 'jetpack' ) );
	$title      = esc_attr( __( 'Views over 48 hours. Click for more Jetpack Stats.', 'jetpack' ) );

$menu = array(
		'id'    => 'stats',
		'href'  => add_query_arg( 'page', 'stats', admin_url( 'admin.php' ) ), // no menu_page_url() blog-side.
		'title' => "<div><img fetchpriority='low' loading='lazy' decoding='async' src='$img_src' srcset='$img_src 1x, $img_src_2x 2x' width='112' height='24' alt='$alt' title='$title'></div>",
	);

$wp_admin_bar->add_menu( $menu );
}

/**
 * Adds a Stats link to the site-name admin bar submenu, alongside Dashboard.
 *
 * @access public
 * @return void
 */
function stats_add_link_to_admin_bar_site_menu() {
	global $wp_admin_bar;

if (
		! is_object( $wp_admin_bar ) ||
		! $wp_admin_bar->get_node( 'dashboard' ) ||
		! current_user_can( 'view_stats' ) ||
		( new Host() )->is_wpcom_platform()
	) {
		return;
	}

$wp_admin_bar->add_node(
		array(
			'parent' => 'site-name',
			'id'     => 'jetpack-stats',
			'title'  => __( 'Stats', 'jetpack' ),
			'href'   => admin_url( 'admin.php?page=stats' ),
		)
	);
}

/**
 * Stats Get Blog.
 *
 * @deprecated 11.5
 *
 * @access public
 * @return string
 */
function stats_get_blog() {
	_deprecated_function( __METHOD__, 'jetpack-11.5' );
	return Stats_XMLRPC::init()->get_blog();
}

/**
 * Stats Dashboard Widget Options.
 *
 * TODO: This should be moved into class-jetpack-stats-dashboard-widget.php.
 *
 * @access public
 * @return array
 */
function stats_dashboard_widget_options() {
	$defaults = array(
		'chart'  => 1,
		'top'    => 1,
		'search' => 7,
	);
	$options  = get_option( 'stats_dashboard_widget' );
	if ( ( ! $options ) || ! is_array( $options ) ) {
		$options = array();
	}

// Ignore obsolete option values.
	$intervals = array( 1, 7, 31, 90, 365 );
	foreach ( array( 'top', 'search' ) as $key ) {
		if ( isset( $options[ $key ] ) && ! in_array( (int) $options[ $key ], $intervals, true ) ) {
			unset( $options[ $key ] );
		}
	}

return array_merge( $defaults, $options );
}

/**
 * Stats Dashboard Widget Control.
 *
 * TODO: This should be moved into class-jetpack-stats-dashboard-widget.php.
 *
 * @access public
 * @return void
 */
function stats_dashboard_widget_control() {
	stats_dashboard_widget_controls_handle_submission();
	$periods   = array(
		'1'  => __( 'day', 'jetpack' ),
		'7'  => __( 'week', 'jetpack' ),
		'31' => __( 'month', 'jetpack' ),
	);
	$intervals = array(
		'1'   => __( 'the past day', 'jetpack' ),
		'7'   => __( 'the past week', 'jetpack' ),
		'31'  => __( 'the past month', 'jetpack' ),
		'90'  => __( 'the past quarter', 'jetpack' ),
		'365' => __( 'the past year', 'jetpack' ),
	);
	stats_dashboard_widget_controls_html( $intervals, $periods, stats_dashboard_widget_options() );
}

/**
 * Handle widget controls form submission.
 *
 * TODO: This should be moved into class-jetpack-stats-dashboard-widget.php.
 *
 * @access public
 * @return void
 */
function stats_dashboard_widget_controls_handle_submission() {
	$options  = stats_dashboard_widget_options();
	$defaults = array(
		'top'    => 1,
		'search' => 7,
	);

// Check if the correct form was submitted.
	if ( isset( $_POST['stats_id'] ) && 'dashboard_stats' === $_POST['stats_id'] ) {
		// Perform nonce verification.
		if (
			isset( $_POST['dashboard-widget-nonce'] ) &&
			wp_verify_nonce( filter_var( wp_unslash( $_POST['dashboard-widget-nonce'] ) ), 'edit-dashboard-widget_dashboard_stats' )
		) {
			// Update options.
			$options['chart'] = isset( $_POST['chart'] ) ? (int) $_POST['chart'] : 1;
			foreach ( array( 'top', 'search' ) as $key ) {
				$options[ $key ] = isset( $_POST[ $key ] ) ? (int) $_POST[ $key ] : $defaults[ $key ];
			}
			update_option( 'stats_dashboard_widget', $options );
		}
	}
}

/**
 * Output HTML for widget controls.
 *
 * @param array $intervals Array of intervals.
 * @param array $periods Array of periods.
 * @param array $options Array of options.
 *
 * TODO: This should be moved into class-jetpack-stats-dashboard-widget.php.
 *
 * @access public
 * @return void
 */
function stats_dashboard_widget_controls_html( $intervals, $periods, $options ) {
	?>
	<p>
	<label for="chart"><?php esc_html_e( 'Chart stats by', 'jetpack' ); ?></label>
	<select id="chart" name="chart">
	<?php
	foreach ( $periods as $val => $label ) {
		?>
		<option value="<?php echo esc_attr( $val ); ?>"<?php selected( $val, $options['chart'] ); ?>><?php echo esc_html( $label ); ?></option>
		<?php
	}
	?>
	</select>.
	</p>

<p>
	<label for="top"><?php esc_html_e( 'Show top posts over', 'jetpack' ); ?></label>
	<select id="top" name="top">
	<?php
	foreach ( $intervals as $val => $label ) {
		?>
		<option value="<?php echo esc_attr( $val ); ?>"<?php selected( $val, $options['top'] ); ?>><?php echo esc_html( $label ); ?></option>
		<?php
	}
	?>
	</select>.
	</p>

<p>
	<label for="search"><?php esc_html_e( 'Show top search terms over', 'jetpack' ); ?></label>
	<select id="search" name="search">
	<?php
	foreach ( $intervals as $val => $label ) {
		?>
		<option value="<?php echo esc_attr( $val ); ?>"<?php selected( $val, $options['search'] ); ?>><?php echo esc_html( $label ); ?></option>
		<?php
	}
	?>
	</select>.
	</p>
	<?php
}

/**
 * Jetpack Stats Dashboard Widget.
 *
 * TODO: This should be moved into class-jetpack-stats-dashboard-widget.php.
 *
 * @access public
 * @return void
 */
function stats_jetpack_dashboard_widget() {
	?>
	<form id="stats_dashboard_widget_control" action="<?php echo esc_url( admin_url() ); ?>" method="post">
		<?php stats_dashboard_widget_control(); ?>
		<?php wp_nonce_field( 'edit-dashboard-widget_dashboard_stats', 'dashboard-widget-nonce' ); ?>
		<input type="hidden" name="stats_id" value="dashboard_stats" />
		<?php submit_button( __( 'Submit', 'jetpack' ) ); ?>
	</form>
	<button type="button" class="handlediv js-toggle-stats_dashboard_widget_control" aria-expanded="true">
		<span class="screen-reader-text"><?php esc_html_e( 'Configure', 'jetpack' ); ?></span>
		<span class="toggle-indicator" aria-hidden="true"></span>
	</button>
	<div id="dashboard_stats" class="is-loading">
		<div class="inside">
			<div style="height: 250px;"></div>
		</div>
	</div>
	<?php
}

/**
 * Stats Dashboard Widget Content.
 *
 * TODO: This should be moved into class-jetpack-stats-dashboard-widget.php.
 *
 * @access public
 * @return never
 */
function stats_dashboard_widget_content() {
	$width  = isset( $_GET['width'] ) ? intval( $_GET['width'] ) / 2 : null; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
	$height = isset( $_GET['height'] ) ? intval( $_GET['height'] ) - 36 : null; // phpcs:ignore WordPress.Security.NonceVerification.Recommended
	if ( ! $width || $width < 250 ) {
		$width = 370;
	}
	if ( ! $height || $height < 230 ) {
		$height = 180;
	}

$_width  = $width - 5;
	$_height = $height - 5;

$options = stats_dashboard_widget_options();
	$blog_id = Jetpack_Options::get_option( 'id' );

$q = array(
		'noheader' => 'true',
		'proxy'    => '',
		'blog'     => $blog_id,
		'page'     => 'stats',
		'chart'    => '',
		'unit'     => $options['chart'],
		'color'    => get_user_option( 'admin_color' ),
		'width'    => $_width,
		'height'   => $_height,
		'ssl'      => is_ssl(),
		'j'        => sprintf( '%s:%s', JETPACK__API_VERSION, JETPACK__VERSION ),
	);

$url = 'https://' . STATS_DASHBOARD_SERVER . '/wp-admin/index.php';

$url     = add_query_arg( $q, $url );
	$method  = 'GET';
	$timeout = 90;
	$user_id = 0; // Means use the blog token.

$get      = Client::remote_request( compact( 'url', 'method', 'timeout', 'user_id' ) );
	$get_code = wp_remote_retrieve_response_code( $get );
	if ( is_wp_error( $get ) || $get_code === '' || ( 2 !== (int) ( $get_code / 100 ) && 304 !== $get_code ) || empty( $get['body'] ) ) {
		stats_print_wp_remote_error( $get, $url );
	} else {
		$body = stats_convert_post_titles( $get['body'] );
		$body = stats_convert_chart_urls( $body );
		$body = stats_convert_image_urls( $body );
		echo $body; // phpcs:ignore WordPress.Security.EscapeOutput
	}

$post_ids = array();

$csv_end_date = current_time( 'Y-m-d' );
	$csv_args     = array(
		'top'    => "&limit=6&end=$csv_end_date",
		'search' => "&limit=5&end=$csv_end_date",
	);

$top_posts = stats_get_csv( 'postviews', "days=$options[top]$csv_args[top]" );
	foreach ( $top_posts as $i => $post ) {
		if ( 0 === $post['post_id'] ) {
			unset( $top_posts[ $i ] );
			continue;
		}
		$post_ids[] = $post['post_id'];
	}

// Cache.
	get_posts( array( 'include' => implode( ',', array_unique( $post_ids ) ) ) );

$searches     = array();
	$search_terms = stats_get_csv( 'searchterms', "days=$options[search]$csv_args[search]" );
	foreach ( $search_terms as $search_term ) {
		if ( 'encrypted_search_terms' === $search_term['searchterm'] ) {
			continue;
		}
		$searches[] = esc_html( $search_term['searchterm'] );
	}

?>
<div id="stats-info">
	<div id="stats-info-container">
		<div class="stats-info-header">
			<h2><?php esc_html_e( 'Highlights', 'jetpack' ); ?></h2>
			<div class="stats-info-header-right">
				<a href="<?php echo esc_url( admin_url( 'admin.php?page=stats' ) ); ?>" class="button button-primary">
					<?php esc_html_e( 'View detailed stats', 'jetpack' ); ?>
				</a>
			</div>
		</div>
		<div class="stats-info-content">
			<div id="top-posts" class="stats-section">
				<div class="stats-section-inner">
				<h3 class="heading"><?php esc_html_e( 'Top Posts', 'jetpack' ); ?></h3>
				<?php
				if ( empty( $top_posts ) ) {
					?>
					<p class="nothing"><?php esc_html_e( 'Sorry, nothing to report.', 'jetpack' ); ?></p>
					<?php
				} else {
					foreach ( $top_posts as $post ) {
						if ( ! get_post( $post['post_id'] ) ) {
							continue;
						}
						?>
						<p>
						<?php
						printf(
							esc_html(
								/* Translators: Stats dashboard widget Post list with view count: "Post Title 1 View (or Views if plural)". */
								_n( '%1$s %2$s View', '%1$s %2$s Views', $post['views'], 'jetpack' )
							),
							'<a href="' . esc_url( get_permalink( $post['post_id'] ) ) . '">' . esc_html( get_the_title( $post['post_id'] ) ) . '</a>',
							esc_html( number_format_i18n( $post['views'] ) )
						);
						?>
					</p>
						<?php
					}
				}
				?>
				</div>
			</div>
			<div id="top-search" class="stats-section">
				<div class="stats-section-inner">
				<h3 class="heading"><?php esc_html_e( 'Top Searches', 'jetpack' ); ?></h3>
				<?php
				if ( empty( $searches ) ) {
					?>
					<p class="nothing"><?php esc_html_e( 'Sorry, nothing to report.', 'jetpack' ); ?></p>
					<?php
				} else {
					foreach ( $searches as $search_term_item ) {
						printf(
							'<p>%s</p>',
							esc_html( $search_term_item )
						);
					}
				}
				?>
				</div>
			</div>
		</div>
	</div>
</div>
	<?php
	exit( 0 );
}

/**
 * Stats Print WP Remote Error.
 *
 * @access public
 * @param mixed $get Get.
 * @param mixed $url URL.
 * @return void
 */
function stats_print_wp_remote_error( $get, $url ) {
	$state_name     = 'stats_remote_error_' . substr( md5( $url ), 0, 8 );
	$previous_error = Jetpack::state( $state_name );
	$error          = md5( wp_json_encode( compact( 'get', 'url' ), JSON_UNESCAPED_SLASHES ) );
	Jetpack::state( $state_name, $error );
	if ( $error !== $previous_error ) {
		?>
			<div class="wrap">
				<p><?php esc_html_e( 'We were unable to get your stats just now. Please reload this page to try again.', 'jetpack' ); ?></p>
			</div>
		<?php
		return;
	}
	?>
	<div class="wrap">
	<p>
		<?php
			printf(
				/* translators: placeholder is an a href for a support site. */
				esc_html__( 'We were unable to get your stats just now. Please reload this page to try again. If this error persists, please contact %1$s. In your report, please include the information below.', 'jetpack' ),
				sprintf(
					'<a href="https://support.wordpress.com/contact/?jetpack=needs-service">%s</a>',
					esc_html__( 'Jetpack Support', 'jetpack' )
				)
			);
		?>
	</p>
	<pre class="stats-widget-error">
		User Agent: "<?php echo isset( $_SERVER['HTTP_USER_AGENT'] ) ? esc_html( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) ) : ''; // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized ?>"
		Page URL: "http<?php echo ( is_ssl() ? 's' : '' ) . '://' . esc_html( ( isset( $_SERVER['HTTP_HOST'] ) ? wp_unslash( $_SERVER['HTTP_HOST'] ) : '' ) . ( isset( $_SERVER['REQUEST_URI'] ) ? wp_unslash( $_SERVER['REQUEST_URI'] ) : '' ) ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized ?>"
		API URL: "<?php echo esc_url( $url ); ?>"
		<?php
		if ( is_wp_error( $get ) ) {
			foreach ( $get->get_error_codes() as $code ) {
				foreach ( $get->get_error_messages( $code ) as $message ) {
					print esc_html( $code ) . ': "' . esc_html( $message ) . '"';
				}
			}
		} else {
			$get_code       = wp_remote_retrieve_response_code( $get );
			$content_length = strlen( wp_remote_retrieve_body( $get ) );
			?>
				Response code: "<?php print esc_html( $get_code ); ?>"
				Content length: "<?php print esc_html( $content_length ); ?>"
			<?php
		}
		?>
	</pre>
	</div>
	<?php
}

/**
 * Get stats from WordPress.com
 *
 * @param string $table The stats which you want to retrieve: postviews, or searchterms.
 * @param array  $args {
 *      An associative array of arguments.
 *
 *      @type bool    $end        The last day of the desired time frame. Format is 'Y-m-d' (e.g. 2007-05-01)
 *                                and default timezone is UTC date. Default value is Now.
 *      @type string  $days       The length of the desired time frame. Default is 30. Maximum 90 days.
 *      @type int     $limit      The maximum number of records to return. Default is 10. Maximum 100.
 *      @type int     $post_id    The ID of the post to retrieve stats data for
 *      @type string  $summarize  If present, summarizes all matching records. Default Null.
 *      @type int     $blog_id    The WordPress.com blog ID to retrieve stats data for. Default is the current blog.
 *
 * }
 *
 * @return array {
 *      An array of post view data, each post as an array
 *
 *      array {
 *          The post view data for a single post
 *
 *          @type string  $post_id         The ID of the post
 *          @type string  $post_title      The title of the post
 *          @type string  $post_permalink  The permalink for the post
 *          @type string  $views           The number of views for the post within the $num_days specified
 *      }
 * }
 */
function stats_get_csv( $table, $args = null ) {
	$defaults = array(
		'end'       => false,
		'days'      => false,
		'limit'     => 3,
		'post_id'   => false,
		'summarize' => '',
		'blog_id'   => Jetpack_Options::get_option( 'id' ),
	);

$args          = wp_parse_args( $args, $defaults );
	$args['table'] = $table;

$stats_csv_url = add_query_arg( $args, 'https://stats.wordpress.com/csv.php' );

$key = md5( $stats_csv_url );

// Get cache.
	$stats_cache = get_option( 'stats_cache' );
	if ( ! $stats_cache || ! is_array( $stats_cache ) ) {
		$stats_cache = array();
	}

// Return or expire this key.
	if ( isset( $stats_cache[ $key ] ) ) {
		$time = key( $stats_cache[ $key ] );
		if ( time() - $time < 300 ) {
			return $stats_cache[ $key ][ $time ];
		}
		unset( $stats_cache[ $key ] );
	}

$stats_rows = array();
	do {
		$stats = stats_get_remote_csv( $stats_csv_url );
		if ( ! $stats ) {
			break;
		}

$labels = array_shift( $stats );

if ( 0 === stripos( $labels[0], 'error' ) ) {
			break;
		}

$stats_rows = array();
		for ( $s = 0; isset( $stats[ $s ] ); $s++ ) {
			$row = array();
			foreach ( $labels as $col => $label ) {
				$row[ $label ] = $stats[ $s ][ $col ];
			}
			$stats_rows[] = $row;
		}
	} while ( 0 );

// Expire old keys.
	foreach ( $stats_cache as $k => $cache ) {
		if ( ! is_array( $cache ) || 300 < time() - key( $cache ) ) {
			unset( $stats_cache[ $k ] );
		}
	}

// Set cache.
		$stats_cache[ $key ] = array( time() => $stats_rows );
	update_option( 'stats_cache', $stats_cache );

return $stats_rows;
}

/**
 * Stats get remote CSV.
 *
 * @access public
 * @param mixed $url URL.
 * @return array
 */
function stats_get_remote_csv( $url ) {
	$method  = 'GET';
	$timeout = 90;
	$user_id = 0; // Blog token.

/**
 * Recursively run str_getcsv on the stats csv.
 *
 * @since 9.7.0 Remove custom handling since str_getcsv is available on all servers running this now.
 *
 * @param mixed $csv CSV.
 * @return array
 */
function stats_str_getcsv( $csv ) {
	// @todo Correctly handle embedded newlines. Note, despite claims online, `str_getcsv( $csv, "\n" )` does not actually work.
	$lines = explode( "\n", rtrim( $csv, "\n" ) );
	return array_map(
		function ( $line ) {
			return str_getcsv( $line, ',', '"', '' );
		},
		$lines
	);
}

/**
 * Abstract out building the rest api stats path.
 *
 * @param  string $resource Resource.
 * @return string
 */
function jetpack_stats_api_path( $resource = '' ) {
	$resource = ltrim( $resource, '/' );
	return sprintf( '/sites/%d/stats/%s', Stats_Options::get_option( 'blog_id' ), $resource );
}

/**
 * Fetches stats data from the REST API.  Caches locally for 5 minutes.
 *
 * @link: https://developer.wordpress.com/docs/api/1.1/get/sites/%24site/stats/
 * @access public
 * @deprecated 11.5 Use WPCOM_Stats available methodsinstead.
 * @param array  $args (default: array())  The args that are passed to the endpoint.
 * @param string $resource (default: '') Optional sub-endpoint following /stats/.
 * @return array|WP_Error
 */
function stats_get_from_restapi( $args = array(), $resource = '' ) {
	_deprecated_function( __METHOD__, 'jetpack-11.5', 'Please checkout the methods available in Automattic\Jetpack\Stats\WPCOM_Stats' );
	$endpoint    = jetpack_stats_api_path( $resource );
	$api_version = '1.1';
	$args        = wp_parse_args( $args, array() );
	$cache_key   = md5( implode( '|', array( $endpoint, $api_version, wp_json_encode( $args, JSON_UNESCAPED_SLASHES ) ) ) );

$transient_name = "jetpack_restapi_stats_cache_{$cache_key}";

$stats_cache = get_transient( $transient_name );

// Return or expire this key.
	if ( $stats_cache ) {
		$time = key( $stats_cache );
		$data = $stats_cache[ $time ]; // WP_Error or string (JSON encoded object).

if ( is_wp_error( $data ) ) {
			return $data;
		}

return (object) array_merge( array( 'cached_at' => $time ), (array) json_decode( $data ) );
	}

// Do the dirty work.
	$response = Client::wpcom_json_api_request_as_blog( $endpoint, $api_version, $args );
	if ( 200 !== wp_remote_retrieve_response_code( $response ) ) {
		// WP_Error.
		$data = is_wp_error( $response ) ? $response : new WP_Error( 'stats_error' );
		// WP_Error.
		$return = $data;
	} else {
		// string (JSON encoded object).
		$data = wp_remote_retrieve_body( $response );
		// object (rare: null on JSON failure).
		$return = json_decode( $data );
	}

// To reduce size in storage: store with time as key, store JSON encoded data (unless error).
	set_transient( $transient_name, array( time() => $data ), 5 * MINUTE_IN_SECONDS );

return $return;
}

/**
 * Add the Jetpack plugin version to the stats tracking data.
 *
 * @param  array $kvs The stats array in key values.
 * @return array
 */
function filter_stats_array_add_jp_version( $kvs ) {
	$kvs['j'] = sprintf( '%s:%s', JETPACK__API_VERSION, JETPACK__VERSION );

return $kvs;
}

/**
 * Convert stats array to object after sanity checking the array is valid.
 *
 * @param  array $stats_array The stats array.
 * @return WP_Error|Object|null
 */
function convert_stats_array_to_object( $stats_array ) {
	_deprecated_function( __FUNCTION__, 'jetpack-13.2', 'Automattic\Jetpack\Stats\WPCOM_Stats->convert_stats_array_to_object' );

return ( new WPCOM_Stats() )->convert_stats_array_to_object( $stats_array );
}

Editing: stats.php

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