<?php

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/**

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* Archive.org Shortcode

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*

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* Usage:

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* [archiveorg-book goodytwoshoes00newyiala]

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* [archiveorg-book https://www.archive.org/stream/goodytwoshoes00newyiala]

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* [archiveorg id=goodytwoshoes00newyiala width=480 height=430]

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* <iframe src="https://www.archive.org/stream/goodytwoshoes00newyiala?ui=embed#mode/1up" width="480px" height="430px" frameborder="0" ></iframe>

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*

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* @package automattic/jetpack

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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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/**

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* Get ID of requested archive.org book embed.

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*

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* @since 4.5.0

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*

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* @param array $atts Shortcode attributes.

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*

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* @return int|string

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*/

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function jetpack_shortcode_get_archiveorg_book_id( $atts ) {

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if ( isset( $atts[0] ) ) {

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$atts[0] = trim( $atts[0], '=' );

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if ( preg_match( '#archive.org/stream/(.+)/?$#i', $atts[0], $match ) ) {

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$id = $match[1];

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} else {

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$id = $atts[0];

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}

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return $id;

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}

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return 0;

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}

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/**

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* Convert an archive.org book shortcode into an embed code.

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*

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* @since 4.5.0

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*

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* @param array $atts An array of shortcode attributes.

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* @return string The embed code for the Archive.org book

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*/

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function jetpack_archiveorg_book_shortcode( $atts ) {

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global $content_width;

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if ( isset( $atts[0] ) && empty( $atts['id'] ) ) {

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$atts['id'] = jetpack_shortcode_get_archiveorg_book_id( $atts );

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}

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$atts = shortcode_atts(

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array(

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'id' => '',

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'width' => 480,

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'height' => 430,

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),

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$atts

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);

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if ( ! $atts['id'] ) {

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return '<!-- error: missing archive.org book ID -->';

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}

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$id = $atts['id'];

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if ( ! $atts['width'] ) {

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$width = absint( $content_width );

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} else {

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$width = (int) $atts['width'];

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}

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if ( ! $atts['height'] ) {

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$height = round( ( $width / 640 ) * 360 );

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} else {

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$height = (int) $atts['height'];

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}

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return sprintf(

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'<div class="embed-archiveorg-book" style="text-align:center;"><iframe title="%s" src="%s" width="%s" height="%s" style="border:0;" webkitallowfullscreen="true" mozallowfullscreen="true" allowfullscreen></iframe></div>',

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esc_attr__( 'Archive.org Book', 'jetpack' ),

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esc_url( "https://archive.org/stream/{$id}?ui=embed#mode/1up" ),

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esc_attr( $width ),

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esc_attr( $height )

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);

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}

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add_shortcode( 'archiveorg-book', 'jetpack_archiveorg_book_shortcode' );

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/**

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* Compose shortcode from archive.org book iframe.

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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 mixed

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*/

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function jetpack_archiveorg_book_embed_to_shortcode( $content ) {

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if ( ! is_string( $content ) || false === stripos( $content, 'archive.org/stream/' ) ) {

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return $content;

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}

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$regexp = '!<iframe\s+src=[\'"](http|https)://(www.archive|archive)\.org/stream/([^\'"]+)[\'"]((?:\s+\w+(=[\'"][^\'"]*[\'"])?)*)\s></iframe>!i';

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if ( ! preg_match_all( $regexp, $content, $matches, PREG_SET_ORDER ) ) {

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return $content;

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}

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foreach ( $matches as $match ) {

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$url = explode( '?', $match[3] );

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$id = $url[0];

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$params = $match[4];

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$params = wp_kses_hair( $params, array( 'http' ) );

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$width = isset( $params['width'] ) ? absint( $params['width']['value'] ) : 0;

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$height = isset( $params['height'] ) ? absint( $params['height']['value'] ) : 0;

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$wh = '';

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if ( $width && $height ) {

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$wh = ' width=' . $width . ' height=' . $height;

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}

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$shortcode = '[archiveorg-book ' . $id . $wh . ']';

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$content = str_replace( $match[0], $shortcode, $content );

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}

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return $content;

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}

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if ( jetpack_shortcodes_should_hook_pre_kses() ) {

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add_filter( 'pre_kses', 'jetpack_archiveorg_book_embed_to_shortcode' );

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}

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