/**

public static function instance() {

new self();

}

/**

private static $client_hints = array(

'sec-ch-dpr',

'sec-ch-width',

'sec-ch-viewport-width',

'ect', // kept in for legacy reasons

'sec-ch-ect',

'sec-ch-ua-full-version',

'sec-ch-ua-full-version-list',

'sec-ch-ua-platform-version',

'sec-ch-ua-arch',

'sec-ch-ua-wow64',

'sec-ch-ua-bitness',

'sec-ch-ua-model',

/**

);

/**

private static $safe_client_hints = array(

'sec-ch-dpr',

'sec-ch-width',

'sec-ch-viewport-width',

);

/**

private static $rewriter;

/**

public static $tests_running = false;

/**

public static $test_headers_written = array();

/**

public static $test_options = array();

/**

public function __construct() {

// Only enable the hooks if the configuration is valid and the plugin is enabled.

if ( self::should_rewrite() ) {

// Rewriter hook.

add_action( 'template_redirect', array( self::class, 'handle_rewrite_hook' ) );

// Rewrite rendered content in REST API.

add_filter( 'the_content', array( self::class, 'rewrite_html' ), 100 );

/**

add_action( 'send_headers', array( self::class, 'add_headers' ), 0 );

// REST API hooks.

add_filter( 'rest_post_dispatch', array( self::class, 'rewrite_rest_api' ), 10, 3 );

// Custom filters that can be used in themes to update bare URLs and URLs in HTML.

add_filter( 'image_cdn_url', array( self::class, 'rewrite_url' ) );

add_filter( 'image_cdn_html', array( self::class, 'rewrite_html' ) );

// Thrive custom filters

if ( class_exists( 'TCB_Landing_Page' ) ) {

add_filter( 'tve_landing_page_content', array( self::class, 'rewrite_html' ), 100 );

add_filter( 'thrive_css_file_content', array( self::class, 'rewrite_html' ), 100 );

add_filter( 'get_post_metadata', array( self::class, 'tve_custom_css_post_metadata' ), 100, 4 );

}

}

// Hooks.

add_action( 'admin_init', array( self::class, 'register_textdomain' ) );

add_action( 'admin_init', array( Settings::class, 'register_settings' ) );

add_action( 'admin_menu', array( Settings::class, 'add_settings_page' ) );

add_action( 'admin_footer', array( Settings::class, 'register_test_config' ) );

add_action( 'wp_ajax_image_cdn_test_config', array( Settings::class, 'test_config' ) );

add_filter( 'plugin_action_links_' . IMAGE_CDN_BASE, array( self::class, 'add_action_link' ) );

add_action( 'admin_post_register', array( Settings::class, 'register' ) );

add_action( 'admin_post_login', array( Settings::class, 'login' ) );

add_action( 'admin_post_logout', array( Settings::class, 'logout' ) );

add_action( 'admin_footer', array( Settings::class, 'register_analytics' ) );

add_action( 'wp_ajax_image_cdn_analytics', array( Settings::class, 'analytics' ) );

}

/**

private static function header( $key, $value ) {

$val = "$key: $value";

if ( self::$tests_running ) {

self::$test_headers_written[] = $val;

return;

}

header( $val );

}

/**

public static function add_headers() {

self::header( 'Accept-CH', strtolower( implode( ', ', self::$client_hints ) ) );

// Add resource hints and feature policy.

$options = self::get_options();

$host = wp_parse_url( $options['url'], PHP_URL_HOST );

if ( empty( $host ) ) {

return;

}

$protocol = is_ssl() ? 'https' : 'http';

// Add Preconnect header.

self::header( 'Link', "<{$protocol}://{$host}>; rel=preconnect" );

// Add Feature-Policy header.

// @deprecated in favor of Permissions-Policy and will be removed once adaquate market

// adoption has been reached (90-95%).

$features = array();

foreach ( self::$client_hints as $hint ) {

$features[] = strtolower( "ch-{$hint} {$protocol}://{$host}" );

}

$permissions = array();

foreach ( self::$client_hints as $hint ) {

$get_hint = str_replace( 'sec-', '', $hint );

if($get_hint ==='ect') continue;

$permissions[] = strtolower( "{$get_hint}=(\"{$protocol}://{$host}\")" );

}

// Add Permissions-Policy header.

// This header replaced Feature-Policy in Chrome 88, released in January 2021.

// @see https://github.com/w3c/webappsec-permissions-policy/blob/main/permissions-policy-explainer.md#appendix-big-changes-since-this-was-called-feature-policy .

self::header( 'Permissions-Policy', strtolower( implode( ', ', $permissions ) ) );

}

/**

public static function add_head_tags() {

// Add client hints.

echo ' <meta http-equiv="Accept-CH" content="' . esc_attr( implode( ', ', self::$client_hints ) ) . '">' . "\n";

// Add resource hints.

$options = self::get_options();

$host = wp_parse_url( $options['url'], PHP_URL_HOST );

if ( ! empty( $host ) ) {

echo ' <link rel="preconnect" href="//' . esc_attr( $host ) . '">' . "\n";

}

}

/**

public static function add_action_link( $data ) {

// check permission.

if ( ! current_user_can( 'manage_options' ) ) {

return $data;

}

return array_merge(

$data,

array(

sprintf(

'<a href="%s">%s</a>',

add_query_arg( array( 'page' => 'image_cdn' ), admin_url( 'admin.php' ) ),

__( 'Settings' )

),

)

);

}

/**

public static function get_client_hints() {

return self::$client_hints;

}

/**

public static function get_safe_client_hints() {

return self::$safe_client_hints;

}

/**

public static function get_unsafe_client_hints() {

return array_diff( self::$client_hints, self::$safe_client_hints );

}

/**

public static function rewrite_rest_api( $result, $server, $request ) {

if ( ! ( $result instanceof \WP_REST_Response && is_array( $result->data ) ) ) {

return $result;

}

$rewriter = self::get_rewriter();

$url_matcher = $rewriter->generate_regex_for_url();

$url = array_key_exists( 'REQUEST_URI', $_SERVER ) ? esc_url_raw( wp_unslash( $_SERVER['REQUEST_URI'] ) ) : '';

$is_woocommerce = strpos( $url, '/wp-json/wc/' ) !== false;

foreach ( $result->data as &$item ) {

if ( ! is_array( $item ) ) {

continue;

}

// Rewrite image URLs for Advanced Custom Fields REST API.

if ( array_key_exists( 'acf', $item ) ) {

foreach ( $item['acf'] as &$field ) {

if ( ! is_array( $field ) ) {

continue;

}

if ( array_key_exists( 'type', $field ) && 'image' === $field['type'] ) {

// Main image.

if ( preg_match( $url_matcher, $field['url'] ) ) {

$field['url'] = $rewriter->rewrite_url( $field['url'] );

}

// Icon.

if ( preg_match( $url_matcher, $field['icon'] ) ) {

$field['icon'] = $rewriter->rewrite_url( $field['icon'] );

}

// Image variants.

foreach ( $field['sizes'] as &$variant ) {

if ( is_string( $variant ) && preg_match( $url_matcher, $variant ) ) {

$variant = $rewriter->rewrite_url( $variant );

}

}

}

}

}

// Rewrite image URLs for WooCommerce REST API.

if ( $is_woocommerce ) {

// Product gallery images.

if ( array_key_exists( 'images', $item ) && is_array( $item['images'] ) ) {

foreach ( $item['images'] as &$image ) {

if ( ! is_array( $image ) ) {

continue;

}

if ( array_key_exists( 'src', $image ) && preg_match( $url_matcher, $image['src'] ) ) {

$image['src'] = $rewriter->rewrite_url( $image['src'] );

}

}

}

// HTML fragments.

foreach ( array( 'description', 'short_description', 'price_html' ) as $fragment ) {

if ( array_key_exists( $fragment, $item ) && is_string( $item[ $fragment ] ) ) {

$item[ $fragment ] = $rewriter->rewrite( $item[ $fragment ] );

}

}

}

}

return $result;

}

/**

public static function handle_uninstall_hook() {

delete_option( 'image_cdn' );

}

/**

public static function default_options() {

$content_path = trim( wp_parse_url( content_url(), PHP_URL_PATH ), '/' );

$includes_path = trim( wp_parse_url( includes_url(), PHP_URL_PATH ), '/' );

return array(

'url' => '',

'dirs' => implode( ',', array( $content_path, $includes_path ) ),

'excludes' => '.php',

'relative' => true,

'https' => true,

'directives' => '',

'enabled' => false,

);

}

/**

public static function handle_activation_hook() {

add_option( 'image_cdn', self::default_options() );

}

/**

public static function settings_redirect( $plugin ) {

if ( ! defined( 'IMAGE_CDN_BASE' ) || IMAGE_CDN_BASE !== $plugin ) {

return;

}

wp_safe_redirect( add_query_arg( array( 'page' => 'image_cdn' ), admin_url( 'admin.php' ) ) );

exit;

}

/**

public static function image_cdn_requirements_check() {

// WordPress version check.

if ( version_compare( $GLOBALS['wp_version'], IMAGE_CDN_MIN_WP . 'alpha', '<' ) ) {

show_message(

sprintf(

'<div class="error"><p>%s</p></div>',

sprintf(

// translators: %s: WordPress version.

__( 'The Image CDN plugin is optimized for WordPress %s. Please disable the plugin or upgrade your WordPress installation (recommended).', 'image-cdn' ),

IMAGE_CDN_MIN_WP

)

)

);

}

}

/**

public static function register_textdomain() {

load_plugin_textdomain( 'image-cdn', false, 'image-cdn/lang' );

}

/**

public static function get_options() {

if ( self::$tests_running ) {

return self::$test_options;

}

return wp_parse_args( get_option( 'image_cdn' ), self::default_options() );

}

/**

public static function update_delivery_address( $delivery_addresses ) {

if ( is_string( $delivery_addresses ) ) {

$delivery_address = $delivery_addresses;

$options = self::get_options();

$options['url'] = (is_ssl() ? "https://" : "http://") . $delivery_address . ".imgeng.in";

// $options['enabled'] = true;

$options['https'] = is_ssl();

self::update_options( $options );

return __( "Delivery address saved!", "image-cdn" );

} else {

$found = false;

$options = self::get_options();

foreach ( $delivery_addresses as &$address ) {

$address = $address . ".imgeng.in";

$url = (is_ssl() ? "https://" : "http://") . $address;

if ( $url == $options['url'] ) {

$found = true;

break;

}

}

if ( $found ) {

return __("Delivery address found! You can choose a different delivery address bellow.", "image-cdn");

} else {

$options['url'] = '';

$options['enabled'] = false;

self::update_options( $options );

return __("Please choose a delivery address bellow!", "image-cdn");

}

}

}

/**

public static function update_options( $options ) {

return update_option( 'image_cdn', $options );

}

/**

public static function get_rewriter() {

if ( ! ( self::$rewriter instanceof Rewriter ) ) {

$options = self::get_options();

$excludes = array_map( 'trim', explode( ',', $options['excludes'] ) );

self::$rewriter = new Rewriter(

get_option( 'home' ),

$options['url'],

$options['dirs'],

$excludes,

$options['relative'],

$options['https'],

$options['directives']

);

}

return self::$rewriter;

}

/**

public static function handle_rewrite_hook() {

$rewriter = self::get_rewriter();

ob_start( array( $rewriter, 'rewrite' ) );

}

/**

public static function rewrite_html( $html ) {

$rewriter = self::get_rewriter();

return $rewriter->rewrite( $html );

}

/**

public static function should_rewrite() {

$options = self::get_options();

if ( ! $options['enabled'] ) {

return false;

}

if ( '' === $options['url'] ) {

return false;

}

return true;

}

/**

public static function rewrite_url( $url ) {

$rewriter = self::get_rewriter();

return $rewriter->rewrite_url( $url );

}

/**

public static function ie_admin_notice() {

$options = self::get_options();

$img_url = $options['url'] . wp_parse_url( plugin_dir_url( IMAGE_CDN_FILE ), PHP_URL_PATH ) . 'assets/logo.png';

global $pagenow;

// check if user is on the settings page.

// phpcs:ignore WordPress.Security.NonceVerification.Recommended

if ( 'admin.php' === $pagenow && isset( $_GET['page'] ) && 'image_cdn' === $_GET['page'] ) {

if ( ! $options['enabled'] || false === self::is_server_imageengine( $img_url ) ) {

?>

<div class="notice notice-warning">

<p>

<?php

printf(

// translators: %s is a link to the ImageEngine site.

esc_html__( 'This plugin will enable the %s CDN on %s.', 'image-cdn' ),

'<a href="https://imageengine.io/?utm_source=WP-plugin-settigns&utm_medium=page&utm_term=wp-imageengine&utm_campaign=wp-imageengine" target="_blank">ImageEngine</a>',

esc_html( get_site_url() )

);

?>

</p>

<ol>

<li><?php esc_html_e( 'Claim your delivery address by signing up, or log in if you already have an account.', 'image-cdn') ?></li>

<li><?php esc_html_e( 'Delivery address appears in the Setup tab below.', 'image-cdn') ?></li>

<?php

if ( ! $options['enabled'] ) {

?>

<li>Enable ImageEngine and hit "Test Configuration" before saving the changes.</li>

<?php

}

?>

</ol>

<p>See <a href="https://support.imageengine.io/hc/en-us/articles/360059238371-Quick-Start/?utm_source=WP-plugin-settigns&utm_medium=page&utm_term=wp-imageengine&utm_campaign=wp-imageengine" target="_blank">full documentation.</a></p>

</div>

<?php

} else {

?>

<div class="notice notice-success">

<p>

<?php

printf(

// translators: %s is a the ImageEngine delivery address .

esc_html__( '%s is a valid ImageEngine delivery address.', 'image-cdn' ),

'<code>' . esc_html( $options['url'] ) . '</code>'

);

?>

</p>

<ul>

<li><a href="https://control.imageengine.io/?utm_source=WP-plugin-settigns&utm_medium=page&utm_term=wp-imageengine&utm_campaign=wp-imageengine" target="_blank">ImageEngine Control Panel</a></li>

<li><a href="https://support.imageengine.io/?utm_source=WP-plugin-settigns&utm_medium=page&utm_term=wp-imageengine&utm_campaign=wp-imageengine" target="_blank">ImageEngine Documentation</a></li>

</ul>

</div>

<?php

}

}

}

/**

public static function is_server_imageengine( $url ) {

$cdn_res = wp_remote_get( $url, array( 'sslverify' => true ) );

if ( is_wp_error( $cdn_res ) ) {

return false;

}

if ( 'ScientiaMobile ImageEngine' === $cdn_res['headers']['server'] ) {

return true;

} else {

return false;

}

}

/**

public static function tve_custom_css_post_metadata( $value, $object_id, $meta_key, $single ) {

if ( isset( $meta_key ) && strpos( $meta_key, 'tve_custom_css' ) !== false ) {

remove_filter( 'get_post_metadata', array( self::class, 'tve_custom_css_post_metadata' ), 100 );

$current_meta = get_post_meta( $object_id, $meta_key, $single );

add_filter( 'get_post_metadata', array( self::class, 'tve_custom_css_post_metadata' ), 100, 4 );

$rewriter = self::get_rewriter();

return $rewriter->rewrite( $current_meta );

}

return $value;

}

}