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<?php
/**
* WPSEO plugin file.
*
* @package Yoast\WP\SEO\Generators
*/
namespace Yoast\WP\SEO\Generators;
use WP_Block_Parser_Block;
use Yoast\WP\SEO\Context\Meta_Tags_Context;
use Yoast\WP\SEO\Generators\Schema\Abstract_Schema_Piece;
use Yoast\WP\SEO\Surfaces\Helpers_Surface;
/**
* Class Schema_Generator
*/
class Schema_Generator implements Generator_Interface {
/**
* The helpers surface.
*
* @var Helpers_Surface
*/
private $helpers;
/**
* Generator constructor.
*
* @param Helpers_Surface $helpers The helpers surface.
*/
public function __construct( Helpers_Surface $helpers ) {
$this->helpers = $helpers;
}
/**
* Returns a Schema graph array.
*
* @param Meta_Tags_Context $context The meta tags context.
*
* @return array The graph.
*/
public function generate( Meta_Tags_Context $context ) {
$graph = [];
$pieces = $this->get_graph_pieces( $context );
foreach ( \array_keys( $context->blocks ) as $block_type ) {
/**
* Filter: 'wpseo_pre_schema_block_type_<block-type>' - Allows hooking things to change graph output based on the blocks on the page.
*
* @param string $block_type The block type.
* @param WP_Block_Parser_Block[] $blocks All the blocks of this block type.
* @param Meta_Tags_Context $context A value object with context variables.
*/
\do_action( 'wpseo_pre_schema_block_type_' . $block_type, $context->blocks[ $block_type ], $context );
}
// Do a loop before everything else to inject the context and helpers.
foreach ( $pieces as $piece ) {
if ( \is_a( $piece, Abstract_Schema_Piece::class ) ) {
$piece->context = $context;
$piece->helpers = $this->helpers;
}
}
$pieces_to_generate = [];
foreach ( $pieces as $piece ) {
$identifier = \strtolower( \str_replace( 'Yoast\WP\SEO\Generators\Schema\\', '', \get_class( $piece ) ) );
if ( \property_exists( $piece, 'identifier' ) ) {
$identifier = $piece->identifier;
}
/**
* Filter: 'wpseo_schema_needs_<identifier>' - Allows changing which graph pieces we output.
*
* @api bool $is_needed Whether or not to show a graph piece.
*/
$is_needed = \apply_filters( 'wpseo_schema_needs_' . $identifier, $piece->is_needed() );
if ( ! $is_needed ) {
continue;
}
$pieces_to_generate[ $identifier ] = $piece;
}
foreach ( $pieces_to_generate as $identifier => $piece ) {
$graph_pieces = $piece->generate();
// If only a single graph piece was returned.
if ( isset( $graph_pieces['@type'] ) ) {
$graph_pieces = [ $graph_pieces ];
}
if ( ! \is_array( $graph_pieces ) ) {
continue;
}
foreach ( $graph_pieces as $graph_piece ) {
/**
* Filter: 'wpseo_schema_<identifier>' - Allows changing graph piece output.
*
* @api array $graph_piece The graph piece to filter.
*
* @param Meta_Tags_Context $context A value object with context variables.
*/
$graph_piece = \apply_filters( 'wpseo_schema_' . $identifier, $graph_piece, $context );
if ( \is_array( $graph_piece ) ) {
$graph[] = $graph_piece;
}
}
}
foreach ( $context->blocks as $block_type => $blocks ) {
foreach ( $blocks as $block ) {
/**
* Filter: 'wpseo_schema_block_<block-type>' - Allows filtering graph output per block.
*
* @param WP_Block_Parser_Block $block The block.
* @param Meta_Tags_Context $context A value object with context variables.
*
* @api array $graph Our Schema output.
*/
$block_type = \strtolower( $block['blockName'] );
$graph = \apply_filters( 'wpseo_schema_block_' . $block_type, $graph, $block, $context );
}
}
return [
'@context' => 'https://schema.org',
'@graph' => $graph,
];
}
/**
* Gets all the graph pieces we need.
*
* @param Meta_Tags_Context $context The meta tags context.
*
* @return Abstract_Schema_Piece[] A filtered array of graph pieces.
*/
protected function get_graph_pieces( $context ) {
$schema_pieces = [
new Schema\Organization(),
new Schema\Person(),
new Schema\Website(),
new Schema\Main_Image(),
new Schema\WebPage(),
new Schema\Breadcrumb(),
new Schema\Article(),
new Schema\Author(),
new Schema\FAQ(),
new Schema\HowTo(),
];
/**
* Filter: 'wpseo_schema_graph_pieces' - Allows adding pieces to the graph.
*
* @param Meta_Tags_Context $context An object with context variables.
*
* @api array $pieces The schema pieces.
*/
return \apply_filters( 'wpseo_schema_graph_pieces', $schema_pieces, $context );
}
}