<?php
/**
* Jetpack's Sharing feature, nee Sharedaddy.
* The most super duper sharing tool on the interwebs.
*
* @package automattic/jetpack
*/
// Set up Sharing in wp-admin.
require_once plugin_dir_path( __FILE__ ) . 'sharing.php';
/**
* Send an email via the Email sharing button.
*
* @param array $data Array of information about the shared message.
*
* @return void
*
* @deprecated 11.0
*/
function sharing_email_send_post( $data ) {
$content = sharing_email_send_post_content( $data );
// Borrowed from wp_mail();
if ( empty( $_SERVER['SERVER_NAME'] ) ) {
return;
}
$sitename = strtolower( sanitize_text_field( wp_unslash( $_SERVER['SERVER_NAME'] ) ) );
if ( substr( $sitename, 0, 4 ) === 'www.' ) {
$sitename = substr( $sitename, 4 );
}
/** This filter is documented in core/src/wp-includes/pluggable.php */
$from_email = apply_filters( 'wp_mail_from', 'wordpress@' . $sitename );
if ( ! empty( $data['name'] ) ) {
$s_name = (string) $data['name'];
$name_needs_encoding_regex =
'/[' .
// SpamAssasin's list of characters which "need MIME" encoding
'\x00-\x08\x0b\x0c\x0e-\x1f\x7f-\xff' .
// Our list of "unsafe" characters
'<\r\n' .
']/';
$needs_encoding =
// If it contains any blocked chars.
preg_match( $name_needs_encoding_regex, $s_name ) ||
// Or if we can't use `mb_convert_encoding`
! function_exists( 'mb_convert_encoding' ) ||
// Or if it's not already ASCII
mb_convert_encoding( $data['name'], 'ASCII' ) !== $s_name;
if ( $needs_encoding ) {
$data['name'] = sprintf( '=?UTF-8?B?%s?=', base64_encode( $data['name'] ) ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
}
}
$headers = array();
$headers[] = sprintf( 'From: %1$s <%2$s>', $data['name'], $from_email );
$headers[] = sprintf( 'Reply-To: %1$s <%2$s>', $data['name'], $data['source'] );
// Make sure to pass the title through the normal sharing filters.
$title = $data['sharing_source']->get_share_title( $data['post']->ID );
/**
* Filter the Sharing Email Send Post Subject.
*
* @module sharedaddy
*
* @since 5.8.0
*
* @param string $var Sharing Email Send Post Subject. Default is "Shared Post".
*/
$subject = apply_filters( 'wp_sharing_email_send_post_subject', '[' . __( 'Shared Post', 'jetpack' ) . '] ' . $title );
wp_mail( $data['target'], $subject, $content, $headers );
}
/**
* Checks for spam using Akismet if available.
* Return $data as it if email about to be send out is not spam.
*
* @param array $data Array of information about the shared message.
*
* @return array $data
*
* @deprecated 11.0
*/
function sharing_email_check_for_spam_via_akismet( $data ) {
if ( ! Jetpack::is_akismet_active() ) {
return $data;
}
// Prepare the body_request for akismet
$body_request = array(
'blog' => get_option( 'home' ),
'permalink' => $data['sharing_source']->get_share_url( $data['post']->ID ),
'comment_type' => 'share',
'comment_author' => $data['name'],
'comment_author_email' => $data['source'],
'comment_content' => sharing_email_send_post_content( $data ),
'user_agent' => ( isset( $_SERVER['HTTP_USER_AGENT'] )
? filter_var( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) )
: null
),
);
if ( method_exists( 'Akismet', 'http_post' ) ) {
$body_request['user_ip'] = Akismet::get_ip_address();
$response = Akismet::http_post( build_query( $body_request ), 'comment-check' );
} else {
global $akismet_api_host, $akismet_api_port;
$body_request['user_ip'] = ( isset( $_SERVER['REMOTE_ADDR'] )
? filter_var( wp_unslash( $_SERVER['REMOTE_ADDR'] ) )
: null
);
$response = akismet_http_post( build_query( $body_request ), $akismet_api_host, '/1.1/comment-check', $akismet_api_port );
}
/*
* The Response is spam lets not send the email.
* 'true' is spam
*/
if (
! empty( $response )
&& isset( $response[1] )
&& 'true' == trim( $response[1] ) // phpcs:ignore Universal.Operators.StrictComparisons.LooseEqual -- response comes from the Akismet API.
) {
return false; // don't send the email
}
return $data;
}
/**
* Content of the emails sent to the target email address.
*
* @param array $data Array of information about the shared message.
*
* @return string $content
*
* @deprecated 11.0
*/
function sharing_email_send_post_content( $data ) {
$content = sprintf(
/* translators: included in email when post is shared via email. First item is sender's name. Second is sender's email address. */
__( '%1$s (%2$s) thinks you may be interested in the following post:', 'jetpack' ),
$data['name'],
$data['source']
);
$content .= "\n\n";
// Make sure to pass the title and URL through the normal sharing filters.
$content .= $data['sharing_source']->get_share_title( $data['post']->ID ) . "\n";
$content .= $data['sharing_source']->get_share_url( $data['post']->ID ) . "\n";
return $content;
}
/**
* Add a meta box to the post editing screen for sharing.
*
* @return void
*/
function sharing_add_meta_box() {
global $post;
if ( empty( $post ) ) { // If a current post is not defined, such as when editing a comment.
return;
}
/**
* Filter whether to display the Sharing Meta Box or not.
*
* @module sharedaddy
*
* @since 3.8.0
*
* @param bool true Display Sharing Meta Box.
* @param $post Post.
*/
if ( ! apply_filters( 'sharing_meta_box_show', true, $post ) ) {
return;
}
$post_types = get_post_types( array( 'public' => true ) );
/**
* Filter the Sharing Meta Box title.
*
* @module sharedaddy
*
* @since 2.2.0
*
* @param string $var Sharing Meta Box title. Default is "Sharing".
*/
$title = apply_filters( 'sharing_meta_box_title', __( 'Sharing', 'jetpack' ) );
if ( $post->ID !== get_option( 'page_for_posts' ) ) {
foreach ( $post_types as $post_type ) {
add_meta_box( 'sharing_meta', $title, 'sharing_meta_box_content', $post_type, 'side', 'default', array( '__back_compat_meta_box' => true ) );
}
}
}
/**
* Content of the meta box.
*
* @param WP_Post $post The post to share.
*
* @return void
*/
function sharing_meta_box_content( $post ) {
/**
* Fires before the sharing meta box content.
*
* @module sharedaddy
*
* @since 2.2.0
*
* @param WP_Post $post The post to share.
*/
do_action( 'start_sharing_meta_box_content', $post );
$disabled = get_post_meta( $post->ID, 'sharing_disabled', true ); ?>
<p>
<label for="enable_post_sharing">
<input type="checkbox" name="enable_post_sharing" id="enable_post_sharing" value="1" <?php checked( ! $disabled ); ?>>
<?php esc_html_e( 'Show sharing buttons.', 'jetpack' ); ?>
</label>
<input type="hidden" name="sharing_status_hidden" value="1" />
</p>
<?php
/**
* Fires after the sharing meta box content.
*
* @module sharedaddy
*
* @since 2.2.0
*
* @param WP_Post $post The post to share.
*/
do_action( 'end_sharing_meta_box_content', $post );
}
/**
* Save new sharing status in post meta in the meta box.
*
* @param int $post_id Post ID.
*
* @return int
*/
function sharing_meta_box_save( $post_id ) {
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
return $post_id;
}
if ( ! isset( $_POST['post_type'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing -- Core takes care of the validation.
return $post_id;
}
$post_type_object = get_post_type_object( sanitize_key( $_POST['post_type'] ) ); // phpcs:ignore WordPress.Security.NonceVerification.Missing -- Core takes care of the validation.
// Record sharing disable.
if (
$post_type_object->public
&& current_user_can( 'edit_post', $post_id )
&& isset( $_POST['sharing_status_hidden'] ) // phpcs:ignore WordPress.Security.NonceVerification.Missing -- Core takes care of the validation.
) {
if ( ! isset( $_POST['enable_post_sharing'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing -- Core takes care of the validation.
update_post_meta( $post_id, 'sharing_disabled', 1 );
} else {
delete_post_meta( $post_id, 'sharing_disabled' );
}
}
return $post_id;
}
/**
* If Sharing is disabled, disable the meta box.
*
* @param bool $protected Whether the key is considered protected.
* @param string $meta_key Metadata key.
*
* @return bool
*/
function sharing_meta_box_protected( $protected, $meta_key ) {
if ( 'sharing_disabled' === $meta_key ) {
$protected = true;
}
return $protected;
}
add_filter( 'is_protected_meta', 'sharing_meta_box_protected', 10, 2 );
/**
* Add link to sharing settings in the Plugins screen.
*
* @param array $links An array of plugin action links.
*
* @return array
*/
function sharing_plugin_settings( $links ) {
$settings_link = '<a href="options-general.php?page=sharing.php">' . __( 'Settings', 'jetpack' ) . '</a>';
array_unshift( $links, $settings_link );
return $links;
}
/**
* Add links to settings and support in the plugin row.
*
* @param array $links An array of the plugin's metadata, including the version, author, author URI, and plugin URI.
* @param string $file Path to the plugin file relative to the plugins directory.
*
* @return array
*/
function sharing_add_plugin_settings( $links, $file ) {
if ( $file === basename( __DIR__ ) . '/' . basename( __FILE__ ) ) {
$links[] = '<a href="options-general.php?page=sharing.php">' . __( 'Settings', 'jetpack' ) . '</a>';
$links[] = '<a href="https://support.wordpress.com/sharing/" rel="noopener noreferrer" target="_blank">' . __( 'Support', 'jetpack' ) . '</a>';
}
return $links;
}
/**
* Disable sharing on the frontend if disabled in the admin.
*
* @return void
*/
function sharing_init() {
if ( Jetpack_Options::get_option_and_ensure_autoload( 'sharedaddy_disable_resources', '0' ) ) {
add_filter( 'sharing_js', '__return_false' );
remove_action( 'wp_head', 'sharing_add_header', 1 );
}
}
/**
* Add settings to disable CSS and JS normally enqueued by our feature.
*
* @return void
*/
function sharing_global_resources() {
$disable = get_option( 'sharedaddy_disable_resources' );
?>
<tr valign="top">
<th scope="row"><label for="disable_css"><?php esc_html_e( 'Disable CSS and JS', 'jetpack' ); ?></label></th>
<td>
<?php
printf(
'<input id="disable_css" type="checkbox" name="disable_resources"%1$s /> <small><em>%2$s</em></small>',
( 1 == $disable ) ? ' checked="checked"' : '', // phpcs:ignore Universal.Operators.StrictComparisons.LooseEqual
esc_html__( 'Advanced. If this option is checked, you must include these files in your theme manually for the sharing links to work.', 'jetpack' )
);
?>
</td>
</tr>
<?php
}
/**
* Save settings to disable CSS and JS normally enqueued by our feature.
*
* @return void
*/
function sharing_global_resources_save() {
update_option( 'sharedaddy_disable_resources', isset( $_POST['disable_resources'] ) ? 1 : 0 ); // phpcs:ignore WordPress.Security.NonceVerification.Missing -- nonce handling is handled for all elements at once.
}
/**
* Returns the Recaptcha site/public key.
*
* Supports legacy RECAPTCHA_PUBLIC_KEY or RECAPTCHA_SITE_KEY.
*
* @return string
*
* @deprecated 11.0
*/
function sharing_recaptcha_site_key() {
if ( ! defined( 'RECAPTCHA_PUBLIC_KEY' ) && ! defined( 'RECAPTCHA_SITE_KEY' ) ) {
return '';
}
if ( defined( 'RECAPTCHA_PUBLIC_KEY' ) && ! defined( 'RECAPTCHA_SITE_KEY' ) ) {
define( 'RECAPTCHA_SITE_KEY', RECAPTCHA_PUBLIC_KEY );
}
return RECAPTCHA_SITE_KEY;
}
/**
* Returns the Recaptcha private/secret key.
*
* Supports legacy RECAPTCHA_PRIVATE_KEY or RECAPTCHA_SECRET_KEY.
*
* @return string
*
* @deprecated 11.0
*/
function sharing_recaptcha_secret_key() {
if ( ! defined( 'RECAPTCHA_PRIVATE_KEY' ) && ! defined( 'RECAPTCHA_SECRET_KEY' ) ) {
return '';
}
if ( defined( 'RECAPTCHA_PRIVATE_KEY' ) && ! defined( 'RECAPTCHA_SECRET_KEY' ) ) {
define( 'RECAPTCHA_SECRET_KEY', RECAPTCHA_PRIVATE_KEY );
}
return RECAPTCHA_SECRET_KEY;
}
/**
* Contents of a reCAPTCHA box.
*
* @return void
*
* @deprecated 11.0
*/
function sharing_email_dialog() {
require_once plugin_dir_path( __FILE__ ) . 'recaptcha.php';
$recaptcha = new Jetpack_ReCaptcha(
sharing_recaptcha_site_key(),
sharing_recaptcha_secret_key(),
array( 'script_lazy' => true )
);
echo $recaptcha->get_recaptcha_html(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- escaped in method.
}
/**
* Short-circuit the email sharing button based on the results of reCAPTCHA.
*
* @param bool $true Should we check if the message isn't spam.
* @param object $post Post information.
* @param array $data Information about the shared message.
*
* @deprecated 11.0
*/
function sharing_email_check( $true, $post, $data ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
require_once plugin_dir_path( __FILE__ ) . 'recaptcha.php';
$recaptcha = new Jetpack_ReCaptcha( sharing_recaptcha_site_key(), sharing_recaptcha_secret_key(), array( 'script_lazy' => true ) );
$response = ! empty( $_POST['g-recaptcha-response'] ) // phpcs:ignore WordPress.Security.NonceVerification.Missing -- we do not change anything on the site based on that.
? filter_var( wp_unslash( $_POST['g-recaptcha-response'] ) ) // phpcs:ignore WordPress.Security.NonceVerification.Missing -- we do not change anything on the site based on that.
: '';
$remote_addr = ! empty( $_SERVER['REMOTE_ADDR'] )
? filter_var( wp_unslash( $_SERVER['REMOTE_ADDR'] ) )
: '';
$result = $recaptcha->verify( $response, $remote_addr );
return ( true === $result );
}
add_action( 'init', 'sharing_init' );
add_action( 'add_meta_boxes', 'sharing_add_meta_box' );
add_action( 'save_post', 'sharing_meta_box_save' );
add_action( 'edit_attachment', 'sharing_meta_box_save' );
add_action( 'sharing_global_options', 'sharing_global_resources', 30 );
add_action( 'sharing_admin_update', 'sharing_global_resources_save' );
add_action( 'plugin_action_links_' . basename( __DIR__ ) . '/' . basename( __FILE__ ), 'sharing_plugin_settings', 10, 4 );
add_filter( 'plugin_row_meta', 'sharing_add_plugin_settings', 10, 2 );