<?php

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/**

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* Embed support for Medium

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*

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* Supported formats:

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* - Profiles: https://medium.com/@jeherve

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* - Stories: https://medium.com/@jeherve/this-is-a-story-19f582daaf5b

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* - And all the above in shortcode formats:

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* [medium url="https://medium.com/@jeherve/this-is-a-story-19f582daaf5b" width="100%" border="false" collapsed="true"]

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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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// Faux-oembed support for Medium permalinks.

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wp_embed_register_handler( 'medium', '#^https?://medium.com/([a-zA-z0-9-_@]+)#', 'jetpack_embed_medium_oembed' );

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/**

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* Callback to modify output of embedded Medium posts.

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*

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* @param array $matches Regex partial matches against the URL passed.

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* @param array $attr Attributes received in embed response.

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* @param array $url Requested URL to be embedded.

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*/

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function jetpack_embed_medium_oembed( $matches, $attr, $url ) {

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$attr = jetpack_embed_medium_args( $attr );

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$attr['url'] = $url;

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return jetpack_embed_medium_embed_html( $attr );

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}

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/**

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* Return custom markup to display a Medium profile, collection, or story.

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*

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* @param array $args Attributes received in embed response.

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*/

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function jetpack_embed_medium_embed_html( $args ) {

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$args = jetpack_embed_medium_args( $args );

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

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return;

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}

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$args['type'] = jetpack_embed_medium_get_embed_type( $args['url'] );

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if ( 'collection' === $args['type'] ) {

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return sprintf(

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'<a href="%1$s" target="_blank" rel="noopener noreferrer">%2$s</a>',

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esc_url( $args['url'] ),

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esc_html__( 'View this collection on Medium.com', 'jetpack' )

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);

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}

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wp_enqueue_script(

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'medium-embed',

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'https://static.medium.com/embed.js',

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array(),

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JETPACK__VERSION,

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true

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);

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return sprintf(

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'<a class="m-%1$s" href="%2$s" target="_blank" data-width="%3$s" data-border="%4$s" data-collapsed="%5$s">%6$s</a>',

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esc_attr( $args['type'] ),

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esc_url( $args['url'] ),

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esc_attr( $args['width'] ),

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esc_attr( $args['border'] ),

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esc_attr( $args['collapsed'] ),

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esc_html__( 'View at Medium.com', 'jetpack' )

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);

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}

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/**

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* Shortcode support that allows passing in URL

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*

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* @param array $atts Shortcode attributes.

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*/

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function jetpack_embed_medium_shortcode( $atts ) {

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$atts = jetpack_embed_medium_args( $atts );

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

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global $wp_embed;

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

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} elseif ( current_user_can( 'edit_posts' ) ) {

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return esc_html__( 'You did not provide a valid Medium URL.', 'jetpack' );

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} else {

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return '<!-- Missing Medium URL -->';

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}

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}

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add_shortcode( 'medium', 'jetpack_embed_medium_shortcode' );

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/**

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* Get embed type (profile, collection, or story) based on Medium URL.

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*

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* @param string $url Medium URL.

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*/

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function jetpack_embed_medium_get_embed_type( $url ) {

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$url_path = wp_parse_url( $url, PHP_URL_PATH );

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if ( preg_match( '/^\/@[\.\w]+$/', $url_path ) ) {

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return 'profile';

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} elseif ( preg_match( '/^\/(?:s)\/(.+)$/', $url_path ) ) {

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return 'collection';

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}

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return 'story';

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}

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/**

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* Process Medium shortcode attributes.

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*

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* @param array $atts Shortcode attributes.

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*/

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function jetpack_embed_medium_args( $atts ) {

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return shortcode_atts(

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array(

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'url' => '',

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'width' => '400',

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'border' => true,

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'collapsed' => false,

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),

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$atts,

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'medium'

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);

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}

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