<?php

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/**

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* VR Viewer Shortcode

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* converts [vr] shortcode to an iframe viewer hosted on vr.me.sh

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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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* Scrub URL paramaters for VR viewer

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*

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* @param array $params {

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* parameter array which is passed to the jetpack_vr_viewer.

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*

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* @type string $url url of 360 media

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* @type string $guid guid for videopress

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* @type string $view cinema, 360 - controls if panaroma view, or 360

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* @type string $rotation number for rotating media

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* @type string $preview show preview image or not

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* }

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*

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* @return array|false $url_params Array of URL parameters.

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*/

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function jetpack_vr_viewer_get_viewer_url_params( $params ) {

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$url_params = array();

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if ( isset( $params['rotation'] ) ) {

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$url_params['rotation'] = (int) $params['rotation'];

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}

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if ( isset( $params['view'] ) && in_array( $params['view'], array( 'cinema', '360' ), true ) ) {

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$url_params['view'] = $params['view'];

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}

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if ( isset( $params['preview'] ) && $params['preview'] ) {

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$url_params['preview'] = 1;

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}

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if ( isset( $params['url'] ) ) {

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return array_merge( $url_params, array( 'url' => $params['url'] ) );

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} elseif ( isset( $params['guid'] ) ) {

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return array_merge( $url_params, array( 'guid' => $params['guid'] ) );

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}

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return false;

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}

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/**

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* Get padding for IFRAME depending on view type

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*

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* @param string $view string cinema, 360 - default cinema.

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*

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* @return string $css padding

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*/

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function jetpack_vr_viewer_iframe_padding( $view ) {

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if ( '360' === $view ) {

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return '100%'; // 1:1 square aspect for 360

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}

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return '50%'; // 2:1 panorama aspect

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}

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/**

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* Create HTML for VR Viewer IFRAME and wrapper

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* The viewer code is hosted on vr.me.sh site which is then displayed

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* within posts via an IFRAME. This function returns the IFRAME html.

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*

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* @param array $url_params {

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* parameter array which is passed to the jetpack_vr_viewer.

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*

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* @type string $url url of 360 media

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* @type string $guid guid for videopress

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* @type string $view cinema, 360 - controls if panaroma view, or 360

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* @type string $rotation number for rotating media

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* @type string $preview show preview image or not

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* }

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*

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* @return string $rtn an iframe for viewer.

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*/

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function jetpack_vr_viewer_get_html( $url_params ) {

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global $content_width;

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$iframe = add_query_arg( $url_params, 'https://vr.me.sh/view/' );

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// set some defaults.

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$maxwidth = ( is_numeric( $content_width ) && $content_width > 0 ) ? $content_width : 720;

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$view = ( isset( $url_params['view'] ) ) ? $url_params['view'] : 'cinema';

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

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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( $iframe )

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);

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}

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}

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$rtn = '<div style="position: relative; max-width: ' . $maxwidth . 'px; margin-left: auto; margin-right: auto; overflow: hidden; margin-bottom: 1em;">';

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$rtn .= '<div style="padding-top: ' . jetpack_vr_viewer_iframe_padding( $view ) . ';"></div>';

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$rtn .= '<iframe style="position: absolute; top: 0; right: 0; bottom: 0; left: 0; height: 100%" allowfullscreen="true" frameborder="0" width="100%" height="300" src="' . esc_url( $iframe ) . '">';

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$rtn .= '</iframe>';

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$rtn .= '</div>';

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return $rtn;

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}

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/**

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* Convert [vr] shortcode to viewer

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*

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* Shortcode example:

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* [vr url="https://en-blog.files.wordpress.com/2016/12/regents_park.jpg" view="360"]

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*

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* VR Viewer embed code:

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* <div style="position: relative; max-width: 720px; margin-left: auto; margin-right: auto; overflow: hidden;">

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* <div style="padding-top: 100%;"></div>

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* <iframe style="position: absolute; top: 0; right: 0; bottom: 0; left: 0; height: 100%" allowfullscreen="true" frameborder="0" width="100%" height="400" src="https://vr.me.sh/view/?view=360&amp;url=https://en-blog.files.wordpress.com/2016/12/regents_park.jpg">

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* </iframe>

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* </div>

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*

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* @param array $atts Shortcode attributes.

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*

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* @return string complete vr viewer html

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*/

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function jetpack_vr_viewer_shortcode( $atts ) {

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$params = shortcode_atts(

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array(

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0 => null,

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'url' => null,

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'src' => null,

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'guid' => null,

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'rotation' => null,

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'view' => null,

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'preview' => false,

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),

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$atts

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);

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// We offer a few ways to specify the URL.

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if ( $params[0] ) {

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$params['url'] = $params[0];

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} elseif ( $params['src'] ) {

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$params['url'] = $params['src'];

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}

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$url_params = jetpack_vr_viewer_get_viewer_url_params( $params );

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if ( $url_params ) {

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return jetpack_vr_viewer_get_html( $url_params );

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}

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// add check for user.

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if ( current_user_can( 'edit_posts' ) ) {

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return '[vr] shortcode requires a data source to be given';

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} else {

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return '';

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}

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}

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add_shortcode( 'vr', 'jetpack_vr_viewer_shortcode' );

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