<?php //phpcs:ignore WordPress.Files.FileName.InvalidClassFileName

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/**

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* MailChimp Subscriber Popup Form shortcode

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*

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* Example:

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* [mailchimp_subscriber_popup baseUrl="mc.us11.list-manage.com" uuid="1ca7856462585a934b8674c71" lid="2d24f1898b"]

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*

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* Embed code example:

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* <script type="text/javascript" src="//downloads.mailchimp.com/js/signup-forms/popup/unique-methods/embed.js" data-dojo-config="usePlainJson: true, isDebug: false"></script><script type="text/javascript">window.dojoRequire(["mojo/signup-forms/Loader"], function(L) { L.start({"baseUrl":"mc.us11.list-manage.com","uuid":"1ca7856462585a934b8674c71","lid":"2d24f1898b","uniqueMethods":true}) })</script>

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*/

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if ( ! defined( 'ABSPATH' ) ) {

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exit( 0 );

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}

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// phpcs:disable Universal.Files.SeparateFunctionsFromOO.Mixed -- TODO: Move classes to appropriately-named class files.

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/**

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* Register [mailchimp_subscriber_popup] shortcode and add a filter to 'pre_kses' queue to reverse MailChimp embed to shortcode.

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*

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* @since 4.5.0

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*/

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function jetpack_mailchimp_subscriber_popup() {

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add_shortcode(

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'mailchimp_subscriber_popup',

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array(

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'MailChimp_Subscriber_Popup',

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'shortcode',

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)

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);

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if ( jetpack_shortcodes_should_hook_pre_kses() ) {

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add_filter(

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'pre_kses',

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array(

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'MailChimp_Subscriber_Popup',

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'reversal',

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)

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);

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}

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}

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if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {

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add_action( 'init', 'jetpack_mailchimp_subscriber_popup' );

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} else {

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jetpack_mailchimp_subscriber_popup();

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}

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/**

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* Class MailChimp_Subscriber_Popup

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*

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* @since 4.5.0

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*/

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class MailChimp_Subscriber_Popup {

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/**

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* Regular expressions to reverse script tags to shortcodes.

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*

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* @var array

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*/

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private static $reversal_regexes = array(

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/* raw examplejs */

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'/<script type="text\/javascript" src="(https?:)?\/\/downloads\.mailchimp\.com\/js\/signup-forms\/popup\/unique-methods\/embed\.js" data-dojo-config="([^"]*?)"><\/script><script type="text\/javascript">window.dojoRequire\(\["mojo\/signup-forms\/Loader"\]\, function\(L\) { L\.start\({([^}]*?)}\) }\)<\/script>/s', //phpcs:ignore

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/* visual editor */

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'/&lt;script type="text\/javascript" src="(https?:)?\/\/downloads\.mailchimp\.com\/js\/signup-forms\/popup\/unique-methods\/embed\.js" data-dojo-config="([^"]*?)"&gt;&lt;\/script&gt;&lt;script type="text\/javascript"&gt;window.dojoRequire\(\["mojo\/signup-forms\/Loader"]\, function\(L\) { L\.start\({([^}]*?)}\) }\)&lt;\/script&gt;/s',

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);

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/**

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* Allowed configuration attributes. Used in reversal when checking allowed attributes.

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*

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* @var array

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*/

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private static $allowed_config = array(

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'usePlainJson' => 'true',

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'isDebug' => 'false',

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);

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/**

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* Allowed JS variables. Used in reversal to whitelist variables.

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*

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* @var array

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*/

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private static $allowed_js_vars = array(

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'baseUrl',

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'uuid',

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'lid',

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);

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/**

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* Runs the whole reversal.

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*

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* @since 4.5.0

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*

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* @param string $content Post Content.

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*

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* @return string Content with embeds replaced

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*/

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public static function reversal( $content ) {

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// Bail without the js src.

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if ( ! is_string( $content ) || false === stripos( $content, 'downloads.mailchimp.com/js/signup-forms/popup/unique-methods/embed.js' ) ) {

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return $content;

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}

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// loop through our rules and find valid embeds.

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foreach ( self::$reversal_regexes as $regex ) {

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if ( ! preg_match_all( $regex, $content, $matches ) ) {

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continue;

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}

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foreach ( $matches[3] as $index => $js_vars ) {

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// the regex rule for a specific embed.

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$replace_regex = sprintf( '#\s*%s\s*#', preg_quote( $matches[0][ $index ], '#' ) );

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$attrs = json_decode( '{' . $js_vars . '}' );

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if ( $matches[2][ $index ] ) {

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$config_attrs = json_decode( '{' . $matches[2][ $index ] . '}' );

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foreach ( $config_attrs as $key => $value ) {

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$attrs->$key = ( 1 === $value ) ? 'true' : 'false';

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}

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}

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$shortcode = self::build_shortcode_from_reversal_attrs( $attrs );

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$content = preg_replace( $replace_regex, "\n\n$shortcode\n\n", $content );

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/** This action is documented in modules/widgets/social-media-icons.php */

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do_action( 'jetpack_bump_stats_extras', 'html_to_shortcode', 'mailchimp_subscriber_popup' );

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}

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}

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return $content;

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}

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/**

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* Builds the actual shortcode based on passed in attributes.

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*

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* @since 4.5.0

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*

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* @param array $attrs A valid list of attributes (gets matched against self::$allowed_config and self::$allowed_js_vars).

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*

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* @return string

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*/

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private static function build_shortcode_from_reversal_attrs( $attrs ) {

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$shortcode = '[mailchimp_subscriber_popup ';

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foreach ( $attrs as $key => $value ) {

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// skip unsupported keys.

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if (

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! array_key_exists( $key, self::$allowed_config )

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&& ! in_array( $key, self::$allowed_js_vars, true )

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) {

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continue;

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}

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$value = esc_attr( $value );

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$shortcode .= "$key='$value' ";

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}

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return trim( $shortcode ) . ']';

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}

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/**

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* Parses the shortcode back out to embedded information.

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*

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* @since 4.5.0

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*

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* @param array $lcase_attrs Lowercase shortcode attributes.

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*

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* @return string

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*/

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public static function shortcode( $lcase_attrs ) {

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static $displayed_once = false;

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// Limit to one form per page load.

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if ( $displayed_once ) {

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return '';

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}

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if ( empty( $lcase_attrs ) ) {

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return '<!-- Missing MailChimp baseUrl, uuid or lid -->';

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}

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$defaults = array_fill_keys( self::$allowed_js_vars, '' );

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$defaults = array_merge( $defaults, self::$allowed_config );

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// Convert $attrs back to proper casing since they come through in all lowercase.

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$attrs = array();

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foreach ( $defaults as $key => $value ) {

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if ( array_key_exists( strtolower( $key ), $lcase_attrs ) ) {

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$attrs[ $key ] = $lcase_attrs[ strtolower( $key ) ];

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}

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}

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$attrs = array_map( 'esc_js', array_filter( shortcode_atts( $defaults, $attrs ) ) );

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// Split config & js vars.

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$js_vars = array();

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$config_vars = array();

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foreach ( $attrs as $key => $value ) {

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if (

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'baseUrl' === $key

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&& (

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! preg_match( '#mc\.us\d+\.list-manage\d?\.com#', $value, $matches )

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|| $value !== $matches[0]

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)

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) {

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return '<!-- Invalid MailChimp baseUrl -->';

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}

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if ( in_array( $key, self::$allowed_js_vars, true ) ) {

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$js_vars[ $key ] = $value;

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} else {

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$config_vars[] = "$key: $value";

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}

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}

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// If one of these parameters is missing we can't render the form so exist.

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if ( empty( $js_vars['baseUrl'] ) || empty( $js_vars['uuid'] ) || empty( $js_vars['lid'] ) ) {

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return '<!-- Missing MailChimp baseUrl, uuid or lid -->';

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}

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// Add a uniqueMethods parameter if it is missing from the data we got from the embed code.

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$js_vars['uniqueMethods'] = true;

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/** This action is already documented in modules/widgets/gravatar-profile.php */

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do_action( 'jetpack_stats_extra', 'mailchimp_subscriber_popup', 'view' );

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$displayed_once = true;

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return "\n\n" . '<script type="text/javascript" data-dojo-config="' . esc_attr( implode( ', ', $config_vars ) ) . '">jQuery.getScript( "//downloads.mailchimp.com/js/signup-forms/popup/unique-methods/embed.js", function( data, textStatus, jqxhr ) { window.dojoRequire(["mojo/signup-forms/Loader"], function(L) { L.start(' . wp_json_encode( $js_vars ) . ') });} );</script>' . "\n\n";

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}

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}

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