<?php

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/**

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* Scribd Shortcode

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*

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* [scribd id=DOCUMENT_ID key=DOCUMENT_KEY mode=MODE]

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* DOCUMENT_ID is an integer (also used as an object_id)

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* DOCUMENT_KEY is an alphanumeric hash ('-' character as well)

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* MODE can be 'list', 'book', 'slide', 'slideshow', or 'tile'

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*

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* [scribd id=39027960 key=key-3kaiwcjqhtipf25m8tw mode=list]

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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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* Register Scribd shortcode.

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*

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* @param array $atts Shortcode attributes.

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*/

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function scribd_shortcode_handler( $atts ) {

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$atts = shortcode_atts(

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array(

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'id' => 0,

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'key' => 0,

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'mode' => '',

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),

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$atts,

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'scribd'

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);

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$modes = array( 'list', 'book', 'slide', 'slideshow', 'tile' );

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

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if ( preg_match( '/^[A-Za-z0-9-]+$/', $atts['key'], $m ) ) {

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$atts['key'] = $m[0];

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if ( ! in_array( $atts['mode'], $modes, true ) ) {

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$atts['mode'] = '';

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}

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return scribd_shortcode_markup( $atts );

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} else {

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return '';

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}

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}

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/**

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* Display the shortcode.

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*

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* @param array $atts Shortcode attributes.

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* @return string The rendered shortcode.

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*/

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function scribd_shortcode_markup( $atts ) {

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$sandbox = class_exists( 'Jetpack_AMP_Support' ) && Jetpack_AMP_Support::is_amp_request()

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? 'sandbox="allow-popups allow-scripts allow-same-origin"'

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: '';

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$url = add_query_arg(

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array(

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'start_page' => '1',

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'view_mode' => esc_attr( $atts['mode'] ),

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'access_key' => esc_attr( $atts['key'] ),

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),

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esc_url(

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sprintf(

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'https://www.scribd.com/embeds/%1$d/content',

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absint( $atts['id'] )

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)

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)

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);

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return sprintf(

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'<iframe class="scribd_iframe_embed" src="%1$s" %2$s data-auto-height="true" scrolling="no" id="scribd_%3$d" width="100%%" height="500" frameborder="0"></iframe>

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<div style="font-size:10px;text-align:center;width:100%%"><a href="https://www.scribd.com/doc/%3$d" rel="noopener noreferrer" target="_blank">%4$s</a></div>',

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$url,

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$sandbox,

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absint( $atts['id'] ),

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esc_html__( 'View this document on Scribd', 'jetpack' )

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);

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}

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add_shortcode( 'scribd', 'scribd_shortcode_handler' );

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/**

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* Scribd supports HTTPS, so use that endpoint to get HTTPS-compatible embeds.

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*

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* @param array $providers Array of oEmbed providers.

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*/

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function scribd_https_oembed( $providers ) {

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if ( isset( $providers['#https?://(www\.)?scribd\.com/doc/.*#i'] ) ) {

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$providers['#https?://(www\.)?scribd\.com/doc/.*#i'][0] = 'https://www.scribd.com/services/oembed';

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}

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return $providers;

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}

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add_filter( 'oembed_providers', 'scribd_https_oembed' );

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