<?php
/**
* Google Docs and Google Calendar Shortcode
*
* Presentation:
* <iframe src="https://docs.google.com/present/embed?id=dhfhrphh_123drp8s65c&interval=15&autoStart=true&loop=true&size=l" frameborder="0" width="700" height="559"></iframe>
* <iframe src="https://docs.google.com/presentation/embed?id=13ItX4jV0SOSdr-ZjHarcpTh9Lr4omfsHAp87jpxv8-0&start=false&loop=false&delayms=3000" frameborder="0" width="960" height="749" allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>
*
* Document:
* <iframe src="https://docs.google.com/document/pub?id=1kDatklacdZ_tZUOpWtt_ONzY97Ldj2zFcuO9LBY2Ln4&embedded=true"></iframe>
* <iframe src="https://docs.google.com/document/d/1kDatklacdZ_tZUOpWtt_ONzY97Ldj2zFcuO9LBY2Ln4/pub?embedded=true"></iframe>
* <iframe src="https://docs.google.com/document/d/e/2PACX-1vRkpIdasKL-eKXDjJgpEONduUspZTz0YmKaajfie0eJYnzikuyusuG1_V8X8T9XflN9l8A1oCM2sgEA/pub?embedded=true"></iframe>
*
* External document:
* <iframe width=100% height=560px frameborder=0 src=https://docs.google.com/a/pranab.in/viewer?a=v&pid=explorer&chrome=false&embedded=true&srcid=1VTMwdgGiDMt8MCr75-YkQP-4u9WmEp1Qvf6C26KYBgFilxU2qndpd-VHhBIn&hl=en></iframe>
*
* Spreadsheet Form:
* <iframe src="https://spreadsheets.google.com/embeddedform?formkey=dEVOYnMzZG5jMUpGbjFMYjFYNVB3NkE6MQ" width="760" height="710" frameborder="0" marginheight="0" marginwidth="0">Loading...</iframe>
*
* Spreadsheet Widget:
* <iframe width='500' height='300' frameborder='0' src='https://spreadsheets1.google.com/a/petedavies.com/pub?hl=en&hl=en&key=0AjSij7nlnXvKdHNsNjRSWG12YmVfOEFwdlMxQ3J1S1E&single=true&gid=0&output=html&widget=true'></iframe>
* <iframe width='500' height='300' frameborder='0' src='https://spreadsheets.google.com/spreadsheet/pub?hl=en&hl=en&key=0AhInIwfvYrIUdGJiTXhtUEhBSFVPUzdRZU5OMDlqdnc&output=html&widget=true'></iframe>
*
* Calendar:
* <iframe src="https://www.google.com/calendar/embed?src=serjant%40gmail.com&ctz=Europe/Sofia" style="border: 0" width="800" height="600" frameborder="0" scrolling="no"></iframe>
* <iframe src="http://www.google.com/calendar/hosted/belcastro.com/embed?src=n8nr8sd6v9hnus3nmlk7ed1238%40group.calendar.google.com&ctz=Europe/Zurich" style="border: 0" width="800" height="600" frameborder="0" scrolling="no"></iframe>
*
* Customized calendar:
* <iframe src="https://www.google.com/calendar/embed?title=asdf&showTitle=0&showNav=0&showDate=0&showPrint=0&showTabs=0&showCalendars=0&
* showTz=0&mode=AGENDA&height=300&wkst=2&hl=fi&bgcolor=%23ffcccc&src=m52gdmbgelo3itf00u1v44g0ns%40group.calendar.google.com&color=%234E5D6C&
* src=serjant%40gmail.com&color=%235229A3&ctz=Europe%2FRiga" style=" border:solid 1px #777 " width="500" height="300" frameborder="0" scrolling="no"></iframe>
*
* Generic
* <iframe src="https://docs.google.com/file/d/0B0SIdZW7iu-zX1RWREJpMXVHZVU/preview" width="640" height="480"></iframe>
*
* @package automattic/jetpack
*/
add_filter( 'pre_kses', 'googleapps_embed_to_shortcode' );
add_shortcode( 'googleapps', 'googleapps_shortcode' );
/**
* Reverse iframe embed to shortcode mapping HTML attributes to shortcode attributes.
*
* @since 4.5.0
*
* @param string $content Post content.
*
* @return mixed
*/
function googleapps_embed_to_shortcode( $content ) {
if (
! is_string( $content )
|| false === stripos( $content, '<iframe' )
&& false === stripos( $content, '.google.com' )
) {
return $content;
}
$regexp = '#<iframe((?:\s+\w+="[^"]*")*?)\s*src="https?://(docs|drive|spreadsheets\d*|calendar|www)*\.google\.com/(?!maps)([-\w\./]+)(?:\?)?([^"]+)?"\s*((?:\s+\w+="[^"]*")*?)>.*?</iframe>#i';
$regexp_ent = str_replace( '&#0*58;', '&#0*58;|�*58;', htmlspecialchars( $regexp, ENT_NOQUOTES ) );
$regexp_squot = str_replace( '"', "'", $regexp );
$regexp_ent_squot = str_replace( '"', "'", $regexp_ent );
$regexp_noquot = '!<iframe(.*?)src=https://(docs|drive)\.google\.com/[-\.\w/]*?(viewer)\?(.*?)>(.*?)</iframe>!';
$regexp_ent_noquot = str_replace( '&#0*58;', '&#0*58;|�*58;', htmlspecialchars( $regexp_noquot, ENT_NOQUOTES ) );
foreach ( compact( 'regexp', 'regexp_ent', 'regexp_squot', 'regexp_ent_squot', 'regexp_noquot', 'regexp_ent_noquot' ) as $reg => $regexp ) {
if ( ! preg_match_all( $regexp, $content, $matches, PREG_SET_ORDER ) ) {
continue;
}
foreach ( $matches as $match ) {
$params = $match[1] . $match[5];
if ( in_array( $reg, array( 'regexp_ent', 'regexp_ent_squot' ), true ) ) {
$params = html_entity_decode( $params );
}
$params = wp_kses_hair( $params, array( 'http' ) );
$width = 0;
$height = 0;
if ( isset( $params['width'] ) ) {
$width = (int) $params['width']['value'];
}
if ( isset( $params['height'] ) ) {
$height = (int) $params['height']['value'];
}
// allow the user to specify width greater than 200 inside text widgets.
if (
$width > 400
// We don't need to check a nonce here. A nonce is already checked "further up" in most code paths.
// In the case where no nonce is ever checked, setting this $_POST parameter doesn't do anything the submitter couldn't already do (set the width/height).
&& isset( $_POST['widget-text'] ) // phpcs:ignore WordPress.Security.NonceVerification.Missing
) {
$width = 200;
$height = 200;
}
$attributes = '';
if ( isset( $params['width'] ) && '100%' === $params['width']['value'] ) {
$width = '100%';
}
if ( $width ) {
$attributes = ' width="' . $width . '"';
}
if ( $height ) {
$attributes .= ' height="' . $height . '"';
}
$domain = 'spreadsheets';
if ( in_array( $match[2], array( 'docs', 'drive', 'www', 'calendar' ), true ) ) {
$domain = $match[2];
}
// Make sure this is actually something that the shortcode supports. If it's not, leave the HTML alone.
if ( ! googleapps_validate_domain_and_dir( $domain, $match[3] ) ) {
continue;
}
/** This action is documented in modules/widgets/social-media-icons.php */
do_action( 'jetpack_bump_stats_extras', 'html_to_shortcode', googleapps_service_name( $domain, $match[3] ) );
$content = str_replace( $match[0], '[googleapps domain="' . $domain . '" dir="' . $match[3] . '" query="' . esc_attr( $match[4] ) . '"' . $attributes . ' /]', $content );
}
}
return $content;
}
/**
* Parse shortcode attributes and output a Google Docs embed.
*
* @since 4.5.0
*
* @param array $atts Shortcode attributes.
*
* @return string
*/
function googleapps_shortcode( $atts ) {
global $content_width;
$attr = shortcode_atts(
array(
'width' => '100%',
'height' => '560',
'domain' => 'docs',
'dir' => 'document',
'query' => '',
'src' => '',
),
$atts
);
if ( isset( $content_width ) && is_numeric( $attr['width'] ) && $attr['width'] > $content_width ) {
$attr['width'] = $content_width;
}
if ( isset( $content_width ) && '560' === $attr['height'] ) {
$attr['height'] = floor( $content_width * 3 / 4 );
}
if ( isset( $atts[0] ) && $atts[0] ) {
$attr['src'] = $atts[0];
}
if ( $attr['src'] && preg_match( '!https?://(docs|drive|spreadsheets\d*|calendar|www)*\.google\.com/([-\w\./]+)\?([^"]+)!', $attr['src'], $matches ) ) {
$attr['domain'] = $matches[1];
$attr['dir'] = $matches[2];
parse_str( htmlspecialchars_decode( $matches[3] ), $query_ar );
$query_ar['chrome'] = 'false';
$query_ar['embedded'] = 'true';
$attr['query'] = http_build_query( $query_ar );
}
if ( ! googleapps_validate_domain_and_dir( $attr['domain'], $attr['dir'] ) ) {
return '<!-- Unsupported URL -->';
}
$attr['query'] = $attr['dir'] . '?' . $attr['query'];
/** This action is documented in modules/widgets/social-media-icons.php */
do_action( 'jetpack_bump_stats_extras', 'embeds', googleapps_service_name( $attr['domain'], $attr['dir'] ) );
return sprintf(
'<iframe src="%s" frameborder="0" width="%s" height="%s" marginheight="0" marginwidth="0" allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe>',
esc_url( 'https://' . $attr['domain'] . '.google.com/' . $attr['query'] ),
esc_attr( $attr['width'] ),
esc_attr( $attr['height'] )
);
}
/**
* Check that the domain blogs to a Google Apps domain.
*
* @since 4.5.0
*
* @param string $domain Google subdomain.
* @param string $dir Subdirectory of the shared URL.
*
* @return bool
*/
function googleapps_validate_domain_and_dir( $domain, $dir ) {
if ( ! in_array( $domain, array( 'docs', 'drive', 'www', 'spreadsheets', 'calendar' ), true ) ) {
return false;
}
// Calendars.
if ( ( 'www' === $domain || 'calendar' === $domain ) && 'calendar/' !== substr( $dir, 0, 9 ) ) {
return false;
}
// Docs.
if ( in_array( $domain, array( 'docs', 'drive' ), true ) && ! preg_match( '![-\.\w/]*(presentation/embed|presentation/d/(.*)|present/embed|document/pub|spreadsheets/d/(.*)|document/d/(e/)?[\w-]+/pub|file/d/[\w-]+/preview|viewer|forms/d/(.*)/viewform|spreadsheet/\w+)$!', $dir ) ) {
return false;
}
// Spreadsheets.
if ( 'spreadsheets' === $domain && ! preg_match( '!^([-\.\w/]+/pub|[-\.\w/]*embeddedform)$!', $dir ) ) {
return false;
}
return true;
}
/**
* Get the name of the service we'll be embedding.
*
* @since 4.5.0
*
* @param string $domain Google subdomain.
* @param string $dir Subdirectory of the shared URL.
*
* @return string
*/
function googleapps_service_name( $domain, $dir ) {
switch ( $domain ) {
case 'drive':
case 'docs':
$service_name = ( 'present/embed' === $dir ) ? 'googledocs_presentation' : 'googledocs_document';
break;
case 'spreadsheets':
$service_name = ( 'embeddedform' === $dir ) ? 'googledocs_form' : 'googledocs_spreadsheet';
break;
case 'calendar':
default:
$service_name = 'google_calendar';
}
return $service_name;
}