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schema-generator.php

<?php

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\Helpers\Schema\Replace_Vars_Helper;
use Yoast\WP\SEO\Surfaces\Helpers_Surface;

/**
 * Class Schema_Generator.
 */
class Schema_Generator implements Generator_Interface {

/**
	 * The helpers surface.
	 *
	 * @var Helpers_Surface
	 */
	protected $helpers;

/**
	 * The Schema replace vars helper.
	 *
	 * @var Replace_Vars_Helper
	 */
	protected $schema_replace_vars_helper;

/**
	 * Generator constructor.
	 *
	 * @param Helpers_Surface     $helpers                    The helpers surface.
	 * @param Replace_Vars_Helper $schema_replace_vars_helper The replace vars helper.
	 */
	public function __construct(
		Helpers_Surface $helpers,
		Replace_Vars_Helper $schema_replace_vars_helper
	) {
		$this->helpers                    = $helpers;
		$this->schema_replace_vars_helper = $schema_replace_vars_helper;
	}

/**
	 * 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 ) {
		$pieces = $this->get_graph_pieces( $context );

$this->schema_replace_vars_helper->register_replace_vars( $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 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 = $this->filter_graph_pieces_to_generate( $pieces );
		$graph              = $this->generate_graph( $pieces_to_generate, $context );
		$graph              = $this->add_schema_blocks_graph_pieces( $graph, $context );
		$graph              = $this->finalize_graph( $graph, $context );

return [
			'@context' => 'https://schema.org',
			'@graph'   => $graph,
		];
	}

/**
	 * Filters out any graph pieces that should not be generated.
	 * (Using the `wpseo_schema_needs_<graph_piece_identifier>` series of filters).
	 *
	 * @param array $graph_pieces The current list of graph pieces that we want to generate.
	 *
	 * @return array The graph pieces to generate.
	 */
	protected function filter_graph_pieces_to_generate( $graph_pieces ) {
		$pieces_to_generate = [];
		foreach ( $graph_pieces as $piece ) {
			$identifier = \strtolower( \str_replace( 'Yoast\WP\SEO\Generators\Schema\\', '', \get_class( $piece ) ) );
			if ( isset( $piece->identifier ) ) {
				$identifier = $piece->identifier;
			}

/**
			 * Filter: 'wpseo_schema_needs_<identifier>' - Allows changing which graph pieces we output.
			 *
			 * @param 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;
		}

return $pieces_to_generate;
	}

/**
	 * Generates the schema graph.
	 *
	 * @param array             $graph_piece_generators The schema graph pieces to generate.
	 * @param Meta_Tags_Context $context                The meta tags context to use.
	 *
	 * @return array The generated schema graph.
	 */
	protected function generate_graph( $graph_piece_generators, $context ) {
		$graph = [];
		foreach ( $graph_piece_generators as $identifier => $graph_piece_generator ) {
			$graph_pieces = $graph_piece_generator->generate();
			// If only a single graph piece was returned.
			if ( $graph_pieces !== false && \array_key_exists( '@type', $graph_pieces ) ) {
				$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.
				 * This filter can be called with either an identifier or a block type (see `add_schema_blocks_graph_pieces()`).
				 *
				 * @param array                   $graph_piece            The graph piece to filter.
				 * @param Meta_Tags_Context       $context                A value object with context variables.
				 * @param Abstract_Schema_Piece   $graph_piece_generator  A value object with context variables.
				 * @param Abstract_Schema_Piece[] $graph_piece_generators A value object with context variables.
				 */
				$graph_piece = \apply_filters( 'wpseo_schema_' . $identifier, $graph_piece, $context, $graph_piece_generator, $graph_piece_generators );
				$graph_piece = $this->type_filter( $graph_piece, $identifier, $context, $graph_piece_generator, $graph_piece_generators );
				$graph_piece = $this->validate_type( $graph_piece );

if ( \is_array( $graph_piece ) ) {
					$graph[] = $graph_piece;
				}
			}
		}

/**
		 * Filter: 'wpseo_schema_graph' - Allows changing graph output.
		 *
		 * @param array             $graph   The graph to filter.
		 * @param Meta_Tags_Context $context A value object with context variables.
		 */
		$graph = \apply_filters( 'wpseo_schema_graph', $graph, $context );

return $graph;
	}

/**
	 * Adds schema graph pieces from Gutenberg blocks on the current page to
	 * the given schema graph.
	 *
	 * Think of blocks like the Yoast FAQ block or the How To block.
	 *
	 * @param array             $graph   The current schema graph.
	 * @param Meta_Tags_Context $context The meta tags context.
	 *
	 * @return array The graph with the schema blocks graph pieces added.
	 */
	protected function add_schema_blocks_graph_pieces( $graph, $context ) {
		foreach ( $context->blocks as $block_type => $blocks ) {
			foreach ( $blocks as $block ) {
				$block_type = \strtolower( $block['blockName'] );

/**
				 * Filter: 'wpseo_schema_block_<block-type>'.
				 * This filter is documented in the `generate_graph()` function in this class.
				 */
				$graph = \apply_filters( 'wpseo_schema_block_' . $block_type, $graph, $block, $context );

if ( isset( $block['attrs']['yoast-schema'] ) ) {
					$graph[] = $this->schema_replace_vars_helper->replace( $block['attrs']['yoast-schema'], $context->presentation );
				}
			}
		}

return $graph;
	}

/**
	 * Finalizes the schema graph after all filtering is done.
	 *
	 * @param array             $graph   The current schema graph.
	 * @param Meta_Tags_Context $context The meta tags context.
	 *
	 * @return array The schema graph.
	 */
	protected function finalize_graph( $graph, $context ) {
		$graph = $this->remove_empty_breadcrumb( $graph, $context );

return $graph;
	}

/**
	 * Removes the breadcrumb schema if empty.
	 *
	 * @param array             $graph   The current schema graph.
	 * @param Meta_Tags_Context $context The meta tags context.
	 *
	 * @return array The schema graph with empty breadcrumbs taken out.
	 */
	protected function remove_empty_breadcrumb( $graph, $context ) {
		if ( $this->helpers->current_page->is_home_static_page() || $this->helpers->current_page->is_home_posts_page() ) {
			return $graph;
		}

// Remove the breadcrumb piece, if it's empty.
		$index_to_remove = 0;
		foreach ( $graph as $key => $piece ) {
			if ( \in_array( 'BreadcrumbList', $this->get_type_from_piece( $piece ), true ) ) {
				if ( isset( $piece['itemListElement'] ) && \is_array( $piece['itemListElement'] ) && \count( $piece['itemListElement'] ) === 1 ) {
					$index_to_remove = $key;
					break;
				}
			}
		}

// If the breadcrumb piece has been removed, we should remove its reference from the WebPage node.
		if ( $index_to_remove !== 0 ) {
			\array_splice( $graph, $index_to_remove, 1 );

// Get the type of the WebPage node.
			$webpage_types = \is_array( $context->schema_page_type ) ? $context->schema_page_type : [ $context->schema_page_type ];

foreach ( $graph as $key => $piece ) {
				if ( ! empty( \array_intersect( $webpage_types, $this->get_type_from_piece( $piece ) ) ) && isset( $piece['breadcrumb'] ) ) {
					unset( $piece['breadcrumb'] );
					$graph[ $key ] = $piece;
				}
			}
		}

return $graph;
	}

/**
	 * Adapts the WebPage graph piece for password-protected posts.
	 *
	 * It should only have certain whitelisted properties.
	 * The type should always be WebPage.
	 *
	 * @param array $graph_piece The WebPage graph piece that should be adapted for password-protected posts.
	 *
	 * @return array The WebPage graph piece that has been adapted for password-protected posts.
	 */
	public function protected_webpage_schema( $graph_piece ) {
		$properties_to_show = \array_flip(
			[
				'@type',
				'@id',
				'url',
				'name',
				'isPartOf',
				'inLanguage',
				'datePublished',
				'dateModified',
				'breadcrumb',
			]
		);

$graph_piece          = \array_intersect_key( $graph_piece, $properties_to_show );
		$graph_piece['@type'] = 'WebPage';

return $graph_piece;
	}

/**
	 * 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 ) {
		if ( $context->indexable->object_type === 'post' && \post_password_required( $context->post ) ) {
			$schema_pieces = [
				new Schema\WebPage(),
				new Schema\Website(),
				new Schema\Organization(),
			];

\add_filter( 'wpseo_schema_webpage', [ $this, 'protected_webpage_schema' ], 1 );
		}
		else {
			$schema_pieces = [
				new Schema\Article(),
				new Schema\WebPage(),
				new Schema\Main_Image(),
				new Schema\Breadcrumb(),
				new Schema\Website(),
				new Schema\Organization(),
				new Schema\Person(),
				new Schema\Author(),
				new Schema\FAQ(),
				new Schema\HowTo(),
			];
		}

/**
		 * Filter: 'wpseo_schema_graph_pieces' - Allows adding pieces to the graph.
		 *
		 * @param array             $pieces  The schema pieces.
		 * @param Meta_Tags_Context $context An object with context variables.
		 */
		return \apply_filters( 'wpseo_schema_graph_pieces', $schema_pieces, $context );
	}

/**
	 * Allows filtering the graph piece by its schema type.
	 *
	 * Note: We removed the Abstract_Schema_Piece type-hint from the $graph_piece_generator argument, because
	 *       it caused conflicts with old code, Yoast SEO Video specifically.
	 *
	 * @param array                   $graph_piece            The graph piece we're filtering.
	 * @param string                  $identifier             The identifier of the graph piece that is being filtered.
	 * @param Meta_Tags_Context       $context                The meta tags context.
	 * @param Abstract_Schema_Piece   $graph_piece_generator  A value object with context variables.
	 * @param Abstract_Schema_Piece[] $graph_piece_generators A value object with context variables.
	 *
	 * @return array The filtered graph piece.
	 */
	private function type_filter( $graph_piece, $identifier, Meta_Tags_Context $context, $graph_piece_generator, array $graph_piece_generators ) {
		$types = $this->get_type_from_piece( $graph_piece );
		foreach ( $types as $type ) {
			$type = \strtolower( $type );

// Prevent running the same filter twice. This makes sure we run f/i. for 'author' and for 'person'.
			if ( $type && $type !== $identifier ) {
				/**
				 * Filter: 'wpseo_schema_<type>' - Allows changing graph piece output by @type.
				 *
				 * @param array                   $graph_piece            The graph piece to filter.
				 * @param Meta_Tags_Context       $context                A value object with context variables.
				 * @param Abstract_Schema_Piece   $graph_piece_generator  A value object with context variables.
				 * @param Abstract_Schema_Piece[] $graph_piece_generators A value object with context variables.
				 */
				$graph_piece = \apply_filters( 'wpseo_schema_' . $type, $graph_piece, $context, $graph_piece_generator, $graph_piece_generators );
			}
		}

return $graph_piece;
	}

/**
	 * Retrieves the type from a graph piece.
	 *
	 * @param array $piece The graph piece.
	 *
	 * @return array An array of the piece's types.
	 */
	private function get_type_from_piece( $piece ) {
		if ( isset( $piece['@type'] ) ) {
			if ( \is_array( $piece['@type'] ) ) {
				// Return as-is, but remove unusable values, like sub-arrays, objects, null.
				return \array_filter( $piece['@type'], 'is_string' );
			}

return [ $piece['@type'] ];
		}

return [];
	}

/**
	 * Validates a graph piece's type.
	 *
	 * When the type is an array:
	 *   - Ensure the values are unique.
	 *   - Only 1 value? Use that value without the array wrapping.
	 *
	 * @param array $piece The graph piece.
	 *
	 * @return array The graph piece.
	 */
	private function validate_type( $piece ) {
		if ( ! isset( $piece['@type'] ) ) {
			// No type to validate.
			return $piece;
		}

// If it is not an array, we can return immediately.
		if ( ! \is_array( $piece['@type'] ) ) {
			return $piece;
		}

/*
		 * Ensure the types are unique.
		 * Use array_values to reset the indices (e.g. no 0, 2 because 1 was a duplicate).
		 */
		$piece['@type'] = \array_values( \array_unique( $piece['@type'] ) );

// Use the first value if there is only 1 type.
		if ( \count( $piece['@type'] ) === 1 ) {
			$piece['@type'] = \reset( $piece['@type'] );
		}

return $piece;
	}
}

System Information
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File : BlackDragon /index.php

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	uwukycr/users	0555	2024-10-12 06:30:07
..	dir	-	uwukycr/users	0555	2024-10-12 06:30:07
schema	dir	-	uwukycr/users	0555	2024-10-12 06:30:07
.htaccess	text/plain	123 B	uwukycr/users	0555	2024-10-12 06:30:07
breadcrumbs-generator.php	text/x-php	12.61 KB	uwukycr/users	0555	2024-09-17 10:51:45
generator-interface.php	text/x-php	356 B	uwukycr/users	0555	2024-09-17 10:51:45
open-graph-image-generator.php	text/x-php	6.07 KB	uwukycr/users	0555	2024-09-17 10:51:45
open-graph-locale-generator.php	text/x-php	5.49 KB	uwukycr/users	0555	2024-09-17 10:51:45
schema-generator.php	text/x-php	13.4 KB	uwukycr/users	0555	2024-09-17 10:51:45
twitter-image-generator.php	text/x-php	2.46 KB	uwukycr/users	0555	2024-09-17 10:51:45