<?php
/**
 * The WebPage node and its variants.
 *
 * @package ElevenRank
 * @since   1.0.0
 */

namespace ElevenRank\Modules\Schema;

use ElevenRank\Modules\Meta\Context;

defined( 'ABSPATH' ) || exit;

/**
 * WebPage for pages and posts, CollectionPage for archives, SearchResultsPage for searches and
 * ProfilePage for authors.
 *
 * @since 1.0.0
 */
final class Webpage_Node {

	/**
	 * The node for the page.
	 *
	 * @since 1.0.0
	 *
	 * @param Node_Context $c           Page information.
	 * @param bool         $breadcrumb  Whether the graph has a breadcrumb for this page.
	 * @param bool         $has_image   Whether the graph has a primary image for this page.
	 * @return array<string, mixed>
	 */
	public static function build( Node_Context $c, bool $breadcrumb, bool $has_image ): array {
		$type = self::type( $c->context );
		$node = array(
			'@type'      => $type,
			'@id'        => $c->id( 'webpage' ),
			'url'        => $c->url,
			'name'       => $c->title(),
			'isPartOf'   => array( '@id' => Ids::website() ),
			'inLanguage' => get_bloginfo( 'language' ),
		);

		$description = $c->description();

		if ( '' !== $description ) {
			$node['description'] = $description;
		}

		$post = $c->post();

		if ( null !== $post && in_array( $c->context->type(), array( Context::SINGULAR, Context::ATTACHMENT ), true ) ) {
			$node['datePublished'] = get_post_time( 'c', false, $post );
			$node['dateModified']  = get_post_modified_time( 'c', false, $post );
		}

		if ( $breadcrumb ) {
			$node['breadcrumb'] = array( '@id' => $c->id( 'breadcrumb' ) );
		}

		if ( $has_image ) {
			$node['primaryImageOfPage'] = array( '@id' => $c->id( 'primaryimage' ) );
			$node['image']              = array( '@id' => $c->id( 'primaryimage' ) );
		}

		if ( 'ProfilePage' === $type && null !== $c->context->user() ) {
			$node['mainEntity'] = array( '@id' => Ids::author( $c->context->user()->ID ) );
		}

		return $node;
	}

	/**
	 * The type of page node for a context.
	 *
	 * @since 1.0.0
	 *
	 * @param Context $context Page context.
	 * @return string
	 */
	public static function type( Context $context ): string {
		switch ( $context->type() ) {
			case Context::SEARCH:
				return 'SearchResultsPage';

			case Context::AUTHOR:
				return 'ProfilePage';

			case Context::TERM:
			case Context::DATE:
			case Context::POST_TYPE_ARCHIVE:
			case Context::HOME:
				return 'CollectionPage';
		}

		return 'WebPage';
	}
}