*/
/**
* Get ID of requested archive.org book embed.
*
* @since 4.5.0
*
* @param $atts
*
* @return int|string
*/
function jetpack_shortcode_get_archiveorg_book_id( $atts ) {
if ( isset( $atts[0] ) ) {
$atts[0] = trim( $atts[0] , '=' );
if ( preg_match( '#archive.org/stream/(.+)/?$#i', $atts[0], $match ) ) {
$id = $match[1];
} else {
$id = $atts[0];
}
return $id;
}
return 0;
}
/**
* Convert an archive.org book shortcode into an embed code.
*
* @since 4.5.0
*
* @param array $atts An array of shortcode attributes.
* @return string The embed code for the Archive.org book
*/
function jetpack_archiveorg_book_shortcode( $atts ) {
global $content_width;
if ( isset( $atts[0] ) && empty( $atts['id'] ) ) {
$atts['id'] = jetpack_shortcode_get_archiveorg_book_id( $atts );
}
$atts = shortcode_atts( array(
'id' => '',
'width' => 480,
'height' => 430,
), $atts );
if ( ! $atts['id'] ) {
return '';
}
$id = $atts['id'];
if ( ! $atts['width'] ) {
$width = absint( $content_width );
} else {
$width = intval( $atts['width'] );
}
if ( ! $atts['height'] ) {
$height = round( ( $width / 640 ) * 360 );
} else {
$height = intval( $atts['height'] );
}
$url = esc_url( set_url_scheme( "http://archive.org/stream/{$id}?ui=embed#mode/1up" ) );
$html = "";
return $html;
}
add_shortcode( 'archiveorg-book', 'jetpack_archiveorg_book_shortcode' );
/**
* Compose shortcode from archive.org book iframe.
*
* @since 4.5.0
*
* @param string $content
*
* @return mixed
*/
function jetpack_archiveorg_book_embed_to_shortcode( $content ) {
if ( ! is_string( $content ) || false === stripos( $content, 'archive.org/stream/' ) ) {
return $content;
}
$regexp = '!!i';
if ( ! preg_match_all( $regexp, $content, $matches, PREG_SET_ORDER ) ) {
return $content;
}
foreach ( $matches as $match ) {
$url = explode( '?', $match[3] );
$id = $url[0];
$params = $match[4];
$params = wp_kses_hair( $params, array( 'http' ) );
$width = isset( $params['width'] ) ? absint( $params['width']['value'] ) : 0;
$height = isset( $params['height'] ) ? absint( $params['height']['value'] ) : 0;
$wh = '';
if ( $width && $height ) {
$wh = ' width=' . $width . ' height=' . $height;
}
$shortcode = '[archiveorg-book ' . $id . $wh . ']';
$content = str_replace( $match[0], $shortcode, $content );
}
return $content;
}
add_filter( 'pre_kses', 'jetpack_archiveorg_book_embed_to_shortcode' );