<?php

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/**

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* Kickstarter shortcode

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*

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* Usage:

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* [kickstarter url="https://www.kickstarter.com/projects/peaktoplateau/yak-wool-baselayers-from-tibet-to-the-world" width="480" height=""]

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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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add_shortcode( 'kickstarter', 'jetpack_kickstarter_shortcode' );

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if ( jetpack_shortcodes_should_hook_pre_kses() ) {

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add_filter( 'pre_kses', 'jetpack_kickstarter_embed_to_shortcode' );

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}

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/**

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* Parse shortcode arguments and render its output.

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*

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* @since 4.5.0

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*

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* @param array $atts Shortcode parameters.

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*

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* @return string

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*/

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function jetpack_kickstarter_shortcode( $atts ) {

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if ( empty( $atts['url'] ) ) {

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return '';

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}

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$url = esc_url_raw( $atts['url'] );

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if ( ! preg_match( '#^(www\.)?kickstarter\.com$#i', wp_parse_url( $url, PHP_URL_HOST ) ) ) {

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return '<!-- Invalid Kickstarter URL -->';

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}

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global $wp_embed;

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return $wp_embed->shortcode( $atts, $url );

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}

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/**

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* Converts Kickstarter iframe embeds to a shortcode.

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*

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* EG: <iframe width="480" height="360" src="http://www.kickstarter.com/projects/deweymac/dewey-mac-kid-detective-book-make-diy-and-stem-spy/widget/video.html" frameborder="0" scrolling="no"> </iframe>

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*

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* @since 4.5.0

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*

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* @param string $content Entry content that possibly includes a Kickstarter embed.

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*

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* @return string

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*/

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function jetpack_kickstarter_embed_to_shortcode( $content ) {

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if ( ! is_string( $content ) || false === stripos( $content, 'www.kickstarter.com/projects' ) ) {

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return $content;

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}

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$regexp = '!<iframe((?:\s+\w+=[\'"][^\'"]*[\'"])*)\s+src=[\'"](http://www\.kickstarter\.com/projects/[^/]+/[^/]+)/[^\'"]+[\'"]((?:\s+\w+=[\'"][^\'"]*[\'"])*)>[\s]*</iframe>!i';

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$regexp_ent = str_replace( '&amp;#0*58;', '&amp;#0*58;|&#0*58;', htmlspecialchars( $regexp, ENT_NOQUOTES ) ); // phpcs:ignore

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foreach ( array( 'regexp', 'regexp_ent' ) as $reg ) {

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

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continue;

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}

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foreach ( $matches as $match ) {

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$url = esc_url( $match[2] );

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$params = $match[1] . $match[3];

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if ( 'regexp_ent' === $reg ) {

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$params = html_entity_decode( $params, ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401 );

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}

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

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

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$shortcode = '[kickstarter url=' . $url . ( ( ! empty( $width ) ) ? " width=$width" : '' ) . ']';

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

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}

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}

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return $content;

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}

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