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Add support for script modules #39

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Add support for script modules #39

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46 changes: 45 additions & 1 deletion h2push.php
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,8 @@

namespace Required\H2Push;

use ReflectionClass;

/**
* Starts an output buffer for `wp_head`.
*
Expand Down Expand Up @@ -145,7 +147,7 @@ function get_link_tag( array $attributes ): string {

foreach ( $attributes as $attr => $value ) {
if (
! is_scalar( $value ) ||
! \is_scalar( $value ) ||
( ! \in_array( $attr, [ 'rel', 'href', 'as', 'crossorigin', 'type' ], true ) && ! is_numeric( $attr ) )
) {
continue;
Expand Down Expand Up @@ -286,6 +288,48 @@ function get_push_resources(): array {
'href' => $src,
'as' => 'script',
];

// Script modules.
if ( \function_exists( 'wp_script_modules' ) ) {
$modules = wp_script_modules();

$reflector = new ReflectionClass( $modules );

$get_marked_for_enqueue = $reflector->getMethod( 'get_marked_for_enqueue' );
( \PHP_VERSION_ID < 80100 ) && $get_marked_for_enqueue->setAccessible( true );
$get_src = $reflector->getMethod( 'get_src' );
( \PHP_VERSION_ID < 80100 ) && $get_src->setAccessible( true );

$enqueued = $get_marked_for_enqueue->invoke( $modules );

foreach ( $enqueued as $id => $module ) {
$src = $get_src->invoke( $modules, $id );

if ( empty( $src ) ) {
continue;
}

// Check if it's a local resource.
if ( '/' !== $src[0] ) {
$src_host = wp_parse_url( $src, PHP_URL_HOST );
$is_local = $home_url_host === $src_host;
$is_allowed_host = apply_filters( 'h2push.is_allowed_push_host', $is_local, $src_host );
if ( ! $is_allowed_host ) {
continue;
}
}

$src = str_replace( $home_url, '', $src );

$push_resources[ 'script_module.' . $id ] = [
'href' => $src,
'rel' => 'modulepreload',
];
}

( \PHP_VERSION_ID < 80100 ) && $get_marked_for_enqueue->setAccessible( false );
( \PHP_VERSION_ID < 80100 ) && $get_src->setAccessible( false );
}
}

/**
Expand Down
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