<?php

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/**

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* Spotify shortcode.

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*

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* Usage:

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* [spotify id="spotify:track:4bz7uB4edifWKJXSDxwHcs" width="400" height="100"]

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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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if ( ! shortcode_exists( 'spotify' ) ) {

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add_shortcode( 'spotify', 'jetpack_spotify_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 attributes.

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* @param string $content Post Content.

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*

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* @return string

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*/

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function jetpack_spotify_shortcode( $atts = array(), $content = '' ) {

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if ( ! is_array( $atts ) ) {

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$atts = array();

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}

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if ( ! empty( $content ) ) {

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$id = $content;

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} elseif ( ! empty( $atts['id'] ) ) {

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$id = $atts['id'];

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} elseif ( ! empty( $atts[0] ) ) {

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$id = $atts[0];

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} else {

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return '<!-- Missing Spotify ID -->';

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}

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

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$atts['width'] = 300;

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}

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

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$atts['height'] = 380;

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}

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

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

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// Spotify accepts both URLs and their Spotify ID format, so let them sort it out and validate.

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$embed_url = add_query_arg( 'uri', rawurlencode( $id ), 'https://embed.spotify.com/' );

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// If the shortcode is displayed in a WPCOM notification, display a simple link only.

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// When the shortcode is displayed in the WPCOM Reader, use iframe instead.

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if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {

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require_once WP_CONTENT_DIR . '/lib/display-context.php';

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$context = A8C\Display_Context\get_current_context();

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if ( A8C\Display_Context\NOTIFICATIONS === $context ) {

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return sprintf(

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'<a href="%1$s" target="_blank" rel="noopener noreferrer">%1$s</a>',

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esc_url( $id )

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);

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} elseif ( A8C\Display_Context\READER === $context ) {

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return sprintf(

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'<iframe src="%1$s" height="%2$s" width="%3$s"></iframe>',

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esc_url( $embed_url ),

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esc_attr( $atts['height'] ),

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esc_attr( $atts['width'] )

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);

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}

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}

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return '<iframe src="' . esc_url( $embed_url ) . '" style="display:block; margin:0 auto; width:' . esc_attr( $atts['width'] ) . 'px; height:' . esc_attr( $atts['height'] ) . 'px;" frameborder="0" allowtransparency="true" loading="lazy"></iframe>';

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}

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/**

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* Turn text like this on it's own line into an embed: spotify:track:4bz7uB4edifWKJXSDxwHcs

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* The core WordPress embed functionality only works with URLs

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* Modified version of WP_Embed::autoembed()

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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 string

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*/

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function jetpack_spotify_embed_ids( $content ) {

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$textarr = wp_html_split( $content );

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foreach ( $textarr as &$element ) {

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if ( '' === $element || '<' === $element[0] ) {

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continue;

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}

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// If this element does not contain a Spotify embed, continue.

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if ( ! str_contains( $element, 'spotify:' ) ) {

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continue;

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}

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$element = preg_replace_callback( '|^\s*(spotify:[^\s"]+:[^\s"]+)\s*$|im', 'jetpack_spotify_embed_ids_callback', $element );

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}

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return implode( '', $textarr );

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}

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add_filter( 'the_content', 'jetpack_spotify_embed_ids', 7 );

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/**

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* Call shortcode with ID provided by matching pattern.

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*

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* @since 4.5.0

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*

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* @param array $matches Array of matches for Spofify links.

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*

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* @return string

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*/

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function jetpack_spotify_embed_ids_callback( $matches ) {

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return "\n" . jetpack_spotify_shortcode( array(), $matches[1] ) . "\n";

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}

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