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1<?php
2/**
3 * Google Calendar block render implementation.
4 *
5 * Loaded lazily from google-calendar.php only when the block is rendered, to keep
6 * the render body out of the eager front-end PHP/opcache footprint.
7 *
8 * @package automattic/jetpack
9 */
10
11namespace Automattic\Jetpack\Extensions\Google_Calendar;
12
13use Automattic\Jetpack\Blocks;
14use Jetpack_Gutenberg;
15
16if ( ! defined( 'ABSPATH' ) ) {
17    exit( 0 );
18}
19
20/**
21 * Dynamic rendering of the block.
22 *
23 * @param array $attr Array containing the Google Calendar block attributes.
24 * @return string
25 */
26function render_implementation( $attr ) {
27    $height  = $attr['height'] ?? '600';
28    $url     = isset( $attr['url'] )
29        ? Jetpack_Gutenberg::validate_block_embed_url( $attr['url'], array( 'calendar.google.com' ) ) :
30        '';
31    $classes = Blocks::classes( Blocks::get_block_feature( __DIR__ ), $attr );
32
33    Jetpack_Gutenberg::load_assets_as_required( __DIR__ );
34
35    if ( empty( $url ) ) {
36        return '';
37    }
38
39    $sandbox = 'allow-scripts allow-same-origin allow-popups';
40    if ( Blocks::is_amp_request() ) {
41        $noscript_src = str_replace(
42            '//calendar.google.com/calendar/embed',
43            '//calendar.google.com/calendar/htmlembed',
44            $url
45        );
46
47        $iframe = sprintf(
48            '<amp-iframe src="%1$s" frameborder="0" scrolling="no" height="%2$d" layout="fixed-height" sandbox="%3$s">%4$s%5$s</amp-iframe>',
49            esc_url( $url ),
50            absint( $height ),
51            esc_attr( $sandbox ),
52            sprintf(
53                '<a href="%s" placeholder>%s</a>',
54                esc_url( $url ),
55                esc_html__( 'Google Calendar', 'jetpack' )
56            ),
57            sprintf(
58                '<noscript><iframe src="%1$s" frameborder="0" scrolling="no" sandbox="%2$s"></iframe></noscript>',
59                esc_url( $noscript_src ),
60                esc_attr( $sandbox )
61            )
62        );
63    } else {
64        $iframe = sprintf(
65            '<iframe src="%1$s" frameborder="0" style="border:0" scrolling="no" height="%2$d" width="100%%" sandbox="%3$s"></iframe>',
66            esc_url( $url ),
67            absint( $height ),
68            esc_attr( $sandbox )
69        );
70    }
71
72    return sprintf( '<div class="%s">%s</div>', esc_attr( $classes ), $iframe );
73}