elten Durchschnittswert mit anderen Haushalten vergleichen. Ist dieser Wert im Vergleich recht hoch, können Sie sich auf die Suche nach Stromfressern im Haus machen. Sehr häufig genutzte Elektronik, wie etwa Kühlschränke, Spielekonsolen, Computer oder Fernseher können hier ein guter Anfang sein. Außerdem sind häufige Ursachen für einen hohen Stromverbrauch veraltete Elektrogeräte oder ineffiziente Glühbirnen. Die Energieeffizienzklasse ihrer Lampen können Sie ohne große Umstände beispielsweise mit unserem Energieeffizienzklasse Rechner online ermitteln.</p>

<h3>Energieeffizienzklasse: Worauf achten bei der Heizung?</h3>

<p>Kommen wir nun zur Effizienz der Heizung bzw. der Dämmung. Wichtig ist hierbei der Jahresheizwärmebedarf, der in Kilowattstunden pro Quadratmeter und Jahr (kWh/m2a) berechnet wird. Ein typisches Haus aus den 1970er Jahren weist hier beispielsweise einen Wert von etwa 300 kWh/m2a auf, während ein hochmodernes Haus der Energieeffizienzklasse A auf gerade einmal 15 kWh/m2a kommt. Neubauten sind also auf der Energieeffizienzskala in jedem Fall sparsamer als ältere Immobilien. Falls Sie die Berechnung der Effizienzklasse ihres Hauses selbst durchführen möchten, können Sie folgende Formel anwenden:</p>

<p>Jahresheizwärmebedarf = [Gradtagsfaktor x (Transmissionswärmeverlust + Lüftungswärmeverlust)] – [Nutzungsgrad interner Gewinne x (solare Gewinne + interne Gewinne)] in Kilowattstunden pro Jahr.</p>

<p>Wie Sie sehen ist das nicht unbedingt eine einfache Kalkulation, daher kann es sich unter Umständen lohnen, Hilfe bei der Bewertung zu finden. Wo das am besten geht möchten wir Ihnen gerne als nächstes erklären.</p>

<h3>Wer berechnet Energieeffizienzklassen?</h3>

<p>Prinzipiell können Sie Ihren Energieverbrauch bzw. die Energieeffizienzklasse mit etwas Aufwand und den entsprechenden mathematischen Formeln natürlich selbst berechnen. Diesen komplexen Prozess können Sie aber mit ein paar praktischen Tools im Internet vereinfachen. So können Sie zum Beispiel unseren Energieeffizienzklasse Rechner oder viele andere Rechner, die zum Beispiel von Stromanbietern angeboten werden, nutzen.</p>

<p>Falls das für Sie trotzdem einen zu hohen Aufwand darstellt oder Ihnen schlicht zu kompliziert erscheint, können Sie sich notwendige Informationen, zum Beispiel einen Energieausweis, auch bei Ihrer Hausverwaltung, Ihrem Stromanbieter oder der Baufirma Ihres Gebäudes einholen. Eine weitere Möglichkeit für Sie wäre außerdem spezialisierte Fachbetriebe oder Energieberater zu kontaktieren, die sich mit der Anlagentechnik in jedem Bereich bestens auskennen und Ihnen bei der Ermittlung der Effizienz von Heizung und Strom oder der Ausstellung von einem Energielabel helfen. Einen Überblick über entsprechende Personen mit Expertise in Ihrer Region finden Sie in der <a href="https://www.energie-effizienz-experten.de/fuer-private-bauherren/finden-sie-experten-in-ihrer-naehe" rel="noopener noreferrer" target="_blank">Energieeffizienz-Expertenliste</a>.</p>

<h2>Unser Fazit</h2>

<p>Einen Blick auf die Effizienz Ihrer Immobilie in jedem einzelnen Bereich zu werfen lohnt sich für Sie als Verbraucher in jedem Fall. Sie können mit dem Einsparen von Energie nicht nur einen wichtigen Beitrag zur Erhaltung unserer Umwelt leisten, sondern auch Ihren Energieverbrauch und somit Ihre Ausgaben erheblich senken. Ein großer Aufwand ist bei der Verbesserung der Effizienz Ihres Haushaltes auch nicht zwangsweise notwendig - Fangen Sie am besten in kleinen Schritten beim Stromverbrauch an. Hierfür können Sie diverse Energieeffizienzklassen Rechner zur Bewertung im Internet nutzen und so auf sehr einfache Weise unnötige Stromfresser ausfindig machen. Diese sind insbesondere bei alten Haushaltsgeräten wie Kühlschränken zu finden. Der teilweise höhere Preis von neuen Geräten auf dem Markt rentiert sich also schnell. Sollten Sie sehr alte Geräte noch betreiben, ist es also ratsam sich unter der Berücksichtigung der Angaben des Energieverbrauchs bzw. dem Energielabel nach modernere		'single'         => array(
			'title'       => _x( 'Single Post', 'Template name' ),
			'description' => __( 'Displays a single post.' ),
		),
		'page'           => array(
			'title'       => _x( 'Page', 'Template name' ),
			'description' => __( 'Displays a single page.' ),
		),
		'archive'        => array(
			'title'       => _x( 'Archive', 'Template name' ),
			'description' => __( 'Displays post categories, tags, and other archives.' ),
		),
		'author'         => array(
			'title'       => _x( 'Author', 'Template name' ),
			'description' => __( 'Displays latest posts written by a single author.' ),
		),
		'category'       => array(
			'title'       => _x( 'Category', 'Template name' ),
			'description' => __( 'Displays latest posts in single post category.' ),
		),
		'taxonomy'       => array(
			'title'       => _x( 'Taxonomy', 'Template name' ),
			'description' => __( 'Displays latest posts from a single post taxonomy.' ),
		),
		'date'           => array(
			'title'       => _x( 'Date', 'Template name' ),
			'description' => __( 'Displays posts from a specific date.' ),
		),
		'tag'            => array(
			'title'       => _x( 'Tag', 'Template name' ),
			'description' => __( 'Displays latest posts with a single post tag.' ),
		),
		'attachment'     => array(
			'title'       => __( 'Media' ),
			'description' => __( 'Displays individual media items or attachments.' ),
		),
		'search'         => array(
			'title'       => _x( 'Search', 'Template name' ),
			'description' => __( 'Displays search results.' ),
		),
		'privacy-policy' => array(
			'title'       => __( 'Privacy Policy' ),
			'description' => __( 'Displays the privacy policy page.' ),
		),
		'404'            => array(
			'title'       => _x( '404', 'Template name' ),
			'description' => __( 'Displays when no content is found.' ),
		),
	);

	/**
	 * Filters the list of template types.
	 *
	 * @since 5.9.0
	 *
	 * @param array $default_template_types An array of template types, formatted as [ slug => [ title, description ] ].
	 */
	return apply_filters( 'default_template_types', $default_template_types );
}

/**
 * Checks whether the input 'area' is a supported value.
 * Returns the input if supported, otherwise returns the 'uncategorized' value.
 *
 * @since 5.9.0
 * @access private
 *
 * @param string $type Template part area name.
 *
 * @return string Input if supported, else the uncategorized value.
 */
function _filter_block_template_part_area( $type ) {
	$allowed_areas = array_map(
		static function ( $item ) {
			return $item['area'];
		},
		get_allowed_block_template_part_areas()
	);
	if ( in_array( $type, $allowed_areas, true ) ) {
		return $type;
	}

	$warning_message = sprintf(
		/* translators: %1$s: Template area type, %2$s: the uncategorized template area value. */
		__( '"%1$s" is not a supported wp_template_part area value and has been added as "%2$s".' ),
		$type,
		WP_TEMPLATE_PART_AREA_UNCATEGORIZED
	);
	trigger_error( $warning_message, E_USER_NOTICE );
	return WP_TEMPLATE_PART_AREA_UNCATEGORIZED;
}

/**
 * Finds all nested template part file paths in a theme's directory.
 *
 * @since 5.9.0
 * @access private
 *
 * @param string $base_directory The theme's file path.
 * @return array A list of paths to all template part files.
 */
function _get_block_templates_paths( $base_directory ) {
	$path_list = array();
	if ( file_exists( $base_directory ) ) {
		$nested_files      = new RecursiveIteratorIterator( new RecursiveDirectoryIterator( $base_directory ) );
		$nested_html_files = new RegexIterator( $nested_files, '/^.+\.html$/i', RecursiveRegexIterator::GET_MATCH );
		foreach ( $nested_html_files as $path => $file ) {
			$path_list[] = $path;
		}
	}
	return $path_list;
}

/**
 * Retrieves the template file from the theme for a given slug.
 *
 * @since 5.9.0
 * @access private
 *
 * @param string $template_type 'wp_template' or 'wp_template_part'.
 * @param string $slug          Template slug.
 *
 * @return array|null Template.
 */
function _get_block_template_file( $template_type, $slug ) {
	if ( 'wp_template' !== $template_type && 'wp_template_part' !== $template_type ) {
		return null;
	}

	$themes = array(
		get_stylesheet() => get_stylesheet_directory(),
		get_template()   => get_template_directory(),
	);
	foreach ( $themes as $theme_slug => $theme_dir ) {
		$template_base_paths = get_block_theme_folders( $theme_slug );
		$file_path           = $theme_dir . '/' . $template_base_paths[ $template_type ] . '/' . $slug . '.html';
		if ( file_exists( $file_path ) ) {
			$new_template_item = array(
				'slug'  => $slug,
				'path'  => $file_path,
				'theme' => $theme_slug,
				'type'  => $template_type,
			);

			if ( 'wp_template_part' === $template_type ) {
				return _add_block_template_part_area_info( $new_template_item );
			}

			if ( 'wp_template' === $template_type ) {
				return _add_block_template_info( $new_template_item );
			}

			return $new_template_item;
		}
	}

	return null;
}

/**
 * Retrieves the template files from the theme.
 *
 * @since 5.9.0
 * @access private
 *
 * @param string $template_type 'wp_template' or 'wp_template_part'.
 *
 * @return array Template.
 */
function _get_block_templates_files( $template_type ) {
	if ( 'wp_template' !== $template_type && 'wp_template_part' !== $template_type ) {
		return null;
	}

	$themes         = array(
		get_stylesheet() => get_stylesheet_directory(),
		get_template()   => get_template_directory(),
	);
	$template_files = array();
	foreach ( $themes as $theme_slug => $theme_dir ) {
		$template_base_paths  = get_block_theme_folders( $theme_slug );
		$theme_template_files = _get_block_templates_paths( $theme_dir . '/' . $template_base_paths[ $template_type ] );
		foreach ( $theme_template_files as $template_file ) {
			$template_base_path = $template_base_paths[ $template_type ];
			$template_slug      = substr(
				$template_file,
				// Starting position of slug.
				strpos( $template_file, $template_base_path . DIRECTORY_SEPARATOR ) + 1 + strlen( $template_base_path ),
				// Subtract ending '.html'.
				-5
			);
			$new_template_item = array(
				'slug'  => $template_slug,
				'path'  => $template_file,
				'theme' => $theme_slug,
				'type'  => $template_type,
			);

			if ( 'wp_template_part' === $template_type ) {
				$template_files[] = _add_block_template_part_area_info( $new_template_item );
			}

			if ( 'wp_template' === $template_type ) {
				$template_files[] = _add_block_template_info( $new_template_item );
			}
		}
	}

	return $template_files;
}

/**
 * Attempts to add custom template information to the template item.
 *
 * @since 5.9.0
 * @access private
 *
 * @param array $template_item Template to add information to (requires 'slug' field).
 * @return array Template item.
 */
function _add_block_template_info( $template_item ) {
	if ( ! WP_Theme_JSON_Resolver::theme_has_support() ) {
		return $template_item;
	}

	$theme_data = WP_Theme_JSON_Resolver::get_theme_data()->get_custom_templates();
	if ( isset( $theme_data[ $template_item['slug'] ] ) ) {
		$template_item['title']     = $theme_data[ $template_item['slug'] ]['title'];
		$template_item['postTypes'] = $theme_data[ $template_item['slug'] ]['postTypes'];
	}

	return $template_item;
}

/**
 * Attempts to add the template part's area information to the input template.
 *
 * @since 5.9.0
 * @access private
 *
 * @param array $template_info Template to add information to (requires 'type' and 'slug' fields).
 *
 * @return array Template info.
 */
function _add_block_template_part_area_info( $template_info ) {
	if ( WP_Theme_JSON_Resolver::theme_has_support() ) {
		$theme_data = WP_Theme_JSON_Resolver::get_theme_data()->get_template_parts();
	}

	if ( isset( $theme_data[ $template_info['slug'] ]['area'] ) ) {
		$template_info['title'] = $theme_data[ $template_info['slug'] ]['title'];
		$template_info['area']  = _filter_block_template_part_area( $theme_data[ $template_info['slug'] ]['area'] );
	} else {
		$template_info['area'] = WP_TEMPLATE_PART_AREA_UNCATEGORIZED;
	}

	return $template_info;
}

/**
 * Returns an array containing the references of
 * the passed blocks and their inner blocks.
 *
 * @since 5.9.0
 * @access private
 *
 * @param array $blocks array of blocks.
 *
 * @return array block references to the passed blocks and their inner blocks.
 */
function _flatten_blocks( &$blocks ) {
	$all_blocks = array();
	$queue      = array();
	foreach ( $blocks as &$block ) {
		$queue[] = &$block;
	}

	while ( count( $queue ) > 0 ) {
		$block = &$queue[0];
		array_shift( $queue );
		$all_blocks[] = &$block;

		if ( ! empty( $block['innerBlocks'] ) ) {
			foreach ( $block['innerBlocks'] as &$inner_block ) {
				$queue[] = &$inner_block;
			}
		}
	}

	return $all_blocks;
}

/**
 * Parses wp_template content and injects the active theme's
 * stylesheet as a theme attribute into each wp_template_part
 *
 * @since 5.9.0
 * @access private
 *
 * @param string $template_content serialized wp_template content.
 *
 * @return string Updated 'wp_template' content.
 */
function _inject_theme_attribute_in_block_template_content( $template_content ) {
	$has_updated_content = false;
	$new_content         = '';
	$template_blocks     = parse_blocks( $template_content );

	$blocks = _flatten_blocks( $template_blocks );
	foreach ( $blocks as &$block ) {
		if (
			'core/template-part' === $block['blockName'] &&
			! isset( $block['attrs']['theme'] )
		) {
			$block['attrs']['theme'] = wp_get_theme()->get_stylesheet();
			$has_updated_content     = true;
		}
	}

	if ( $has_updated_content ) {
		foreach ( $template_blocks as &$block ) {
			$new_content .= serialize_block( $block );
		}

		return $new_content;
	}

	return $template_content;
}

/**
 * Parses a block template and removes the theme attribute from each template part.
 *
 * @since 5.9.0
 * @access private
 *
 * @param string $template_content Serialized block template content.
 * @return string Updated block template content.
 */
function _remove_theme_attribute_in_block_template_content( $template_content ) {
	$has_updated_content = false;
	$new_content         = '';
	$template_blocks     = parse_blocks( $template_content );

	$blocks = _flatten_blocks( $template_blocks );
	foreach ( $blocks as $key => $block ) {
		if ( 'core/template-part' === $block['blockName'] && isset( $block['attrs']['theme'] ) ) {
			unset( $blocks[ $key ]['attrs']['theme'] );
			$has_updated_content = true;
		}
	}

	if ( ! $has_updated_content ) {
		return $template_content;
	}

	foreach ( $template_blocks as $block ) {
		$new_content .= serialize_block( $block );
	}

	return $new_content;
}

/**
 * Build a unified template object based on a theme file.
 *
 * @since 5.9.0
 * @access private
 *
 * @param array  $template_file Theme file.
 * @param string $template_type 'wp_template' or 'wp_template_part'.
 *
 * @return WP_Block_Template Template.
 */
function _build_block_template_result_from_file( $template_file, $template_type ) {
	$default_template_types = get_default_block_template_types();
	$template_content       = file_get_contents( $template_file['path'] );
	$theme                  = wp_get_theme()->get_stylesheet();

	$template                 = new WP_Block_Template();
	$template->id             = $theme . '//' . $template_file['slug'];
	$template->theme          = $theme;
	$template->content        = _inject_theme_attribute_in_block_template_content( $template_content );
	$template->slug           = $template_file['slug'];
	$template->source         = 'theme';
	$template->type           = $template_type;
	$template->title          = ! empty( $template_file['title'] ) ? $template_file['title'] : $template_file['slug'];
	$template->status         = 'publish';
	$template->has_theme_file = true;
	$template->is_custom      = true;

	if ( 'wp_template' === $template_type && isset( $default_template_types[ $template_file['slug'] ] ) ) {
		$template->description = $default_template_types[ $template_file['slug'] ]['description'];
		$template->title       = $default_template_types[ $template_file['slug'] ]['title'];
		$template->is_custom   = false;
	}

	if ( 'wp_template' === $template_type && isset( $template_file['postTypes'] ) ) {
		$template->post_types = $template_file['postTypes'];
	}

	if ( 'wp_template_part' === $template_type && isset( $template_file['area'] ) ) {
		$template->area = $template_file['area'];
	}

	return $template;
}

/**
 * Build a unified template object based a post Object.
 *
 * @since 5.9.0
 * @access private
 *
 * @param WP_Post $post Template post.
 *
 * @return WP_Block_Template|WP_Error Template.
 */
function _build_block_template_result_from_post( $post ) {
	$default_template_types = get_default_block_template_types();
	$terms                  = get_the_terms( $post, 'wp_theme' );

	if ( is_wp_error( $terms ) ) {
		return $terms;
	}

	if ( ! $terms ) {
		return new WP_Error( 'template_missing_theme', __( 'No theme is defined for this template.' ) );
	}

	$theme          = $terms[0]->name;
	$has_theme_file = wp_get_theme()->get_stylesheet() === $theme &&
		null !== _get_block_template_file( $post->post_type, $post->post_name );

	$origin = get_post_meta( $post->ID, 'origin', true );

	$template                 = new WP_Block_Template();
	$template->wp_id          = $post->ID;
	$template->id             = $theme . '//' . $post->post_name;
	$template->theme          = $theme;
	$template->content        = $post->post_content;
	$template->slug           = $post->post_name;
	$template->source         = 'custom';
	$template->origin         = ! empty( $origin ) ? $origin : null;
	$template->type           = $post->post_type;
	$template->description    = $post->post_excerpt;
	$template->title          = $post->post_title;
	$template->status         = $post->post_status;
	$template->has_theme_file = $has_theme_file;
	$template->is_custom      = true;
	$template->author         = $post->post_author;

	if ( 'wp_template' === $post->post_type && isset( $default_template_types[ $template->slug ] ) ) {
		$template->is_custom = false;
	}

	if ( 'wp_template_part' === $post->post_type ) {
		$type_terms = get_the_terms( $post, 'wp_template_part_area' );
		if ( ! is_wp_error( $type_terms ) && false !== $type_terms ) {
			$template->area = $type_terms[0]->name;
		}
	}

	return $template;
}

/**
 * Retrieves a list of unified template objects based on a query.
 *
 * @since 5.8.0
 *
 * @param array  $query {
 *     Optional. Arguments to retrieve templates.
 *
 *     @type array  $slug__in  List of slugs to include.
 *     @type int    $wp_id     Post ID of customized template.
 *     @type string $area      A 'wp_template_part_area' taxonomy value to filter by (for wp_template_part template type only).
 *     @type string $post_type Post type to get the templates for.
 * }
 * @param string $template_type 'wp_template' or 'wp_template_part'.
 *
 * @return array Templates.
 */
function get_block_templates( $query = array(), $template_type = 'wp_template' ) {
	/**
	 * Filters the block templates array before the query takes place.
	 *
	 * Return a non-null value to bypass the WordPress queries.
	 *
	 * @since 5.9.0
	 *
	 * @param WP_Block_Template[]|null $block_templates Return an array of block templates to short-circuit the default query,
	 *                                                  or null to allow WP to run it's normal queries.
	 * @param array  $query {
	 *     Optional. Arguments to retrieve templates.
	 *
	 *     @type array  $slug__in List of slugs to include.
	 *     @type int    $wp_id Post ID of customized template.
	 *     @type string $post_type Post type to get the templates for.
	 * }
	 * @param string $template_type wp_template or wp_template_part.
	 */
	$templates = apply_filters( 'pre_get_block_templates', null, $query, $template_type );
	if ( ! is_null( $templates ) ) {
		return $templates;
	}

	$post_type     = isset( $query['post_type'] ) ? $query['post_type'] : '';
	$wp_query_args = array(
		'post_status'    => array( 'auto-draft', 'draft', 'publish' ),
		'post_type'      => $template_type,
		'posts_per_page' => -1,
		'no_found_rows'  => true,
		'tax_query'      => array(
			array(
				'taxonomy' => 'wp_theme',
				'field'    => 'name',
				'terms'    => wp_get_theme()->get_stylesheet(),
			),
		),
	);

	if ( 'wp_template_part' === $template_type && isset( $query['area'] ) ) {
		$wp_query_args['tax_query'][]           = array(
			'taxonomy' => 'wp_template_part_area',
			'field'    => 'name',
			'terms'    => $query['area'],
		);
		$wp_query_args['tax_query']['relation'] = 'AND';
	}

	if ( isset( $query['slug__in'] ) ) {
		$wp_query_args['post_name__in'] = $query['slug__in'];
	}

	// This is only needed for the regular templates/template parts post type listing and editor.
	if ( isset( $query['wp_id'] ) ) {
		$wp_query_args['p'] = $query['wp_id'];
	} else {
		$wp_query_args['post_status'] = 'publish';
	}

	$template_query = new WP_Query( $wp_query_args );
	$query_result   = array();
	foreach ( $template_query->posts as $post ) {
		$template = _build_block_template_result_from_post( $post );

		if ( is_wp_error( $template ) ) {
			continue;
		}

		if ( $post_type && ! $template->is_custom ) {
			continue;
		}

		$query_result[] = $template;
	}

	if ( ! isset( $query['wp_id'] ) ) {
		$template_files = _get_block_templates_files( $template_type );
		foreach ( $template_files as $template_file ) {
			$template = _build_block_template_result_from_file( $template_file, $template_type );

			if ( $post_type && ! $template->is_custom ) {
				continue;
			}

			if ( $post_type &&
				isset( $template->post_types ) &&
				! in_array( $post_type, $template->post_types, true )
			) {
				continue;
			}

			$is_not_custom   = false === array_search(
				wp_get_theme()->get_stylesheet() . '//' . $template_file['slug'],
				wp_list_pluck( $query_result, 'id' ),
				true
			);
			$fits_slug_query =
				! isset( $query['slug__in'] ) || in_array( $template_file['slug'], $query['slug__in'], true );
			$fits_area_query =
				! isset( $query['area'] ) || $template_file['area'] === $query['area'];
			$should_include  = $is_not_custom && $fits_slug_query && $fits_area_query;
			if ( $should_include ) {
				$query_result[] = $template;
			}
		}
	}

	/**
	 * Filters the array of queried block templates array after they've been fetched.
	 *
	 * @since 5.9.0
	 *
	 * @param WP_Block_Template[] $query_result Array of found block templates.
	 * @param array  $query {
	 *     Optional. Arguments to retrieve templates.
	 *
	 *     @type array  $slug__in List of slugs to include.
	 *     @type int    $wp_id Post ID of customized template.
	 * }
	 * @param string $template_type wp_template or wp_template_part.
	 */
	return apply_filters( 'get_block_templates', $query_result, $query, $template_type );
}

/**
 * Retrieves a single unified template object using its id.
 *
 * @since 5.8.0
 *
 * @param string $id            Template unique identifier (example: theme_slug//template_slug).
 * @param string $template_type Optional. Template type: `'wp_template'` or '`wp_template_part'`.
 *                              Default `'wp_template'`.
 *
 * @return WP_Block_Template|null Template.
 */
function get_block_template( $id, $template_type = 'wp_template' ) {
	/**
	 *Filters the block template object before the query takes place.
	 *
	 * Return a non-null value to bypass the WordPress queries.
	 *
	 * @since 5.9.0
	 *
	 * @param WP_Block_Template|null $block_template Return block template object to short-circuit the default query,
	 *                                               or null to allow WP to run its normal queries.
	 * @param string $id                             Template unique identifier (example: theme_slug//template_slug).
	 * @param string $template_type                  Template type: `'wp_template'` or '`wp_template_part'`.
	 */
	$block_template = apply_filters( 'pre_get_block_template', null, $id, $template_type );
	if ( ! is_null( $block_template ) ) {
		return $block_template;
	}

	$parts = explode( '//', $id, 2 );
	if ( count( $parts ) < 2 ) {
		return null;
	}
	list( $theme, $slug ) = $parts;
	$wp_query_args        = array(
		'post_name__in'  => array( $slug ),
		'post_type'      => $template_type,
		'post_status'    => array( 'auto-draft', 'draft', 'publish', 'trash' ),
		'posts_per_page' => 1,
		'no_found_rows'  => true,
		'tax_query'      => array(
			array(
				'taxonomy' => 'wp_theme',
				'field'    => 'name',
				'terms'    => $theme,
			),
		),
	);
	$template_query       = new WP_Query( $wp_query_args );
	$posts                = $template_query->posts;

	if ( count( $posts ) > 0 ) {
		$template = _build_block_template_result_from_post( $posts[0] );

		if ( ! is_wp_error( $template ) ) {
			return $template;
		}
	}

	$block_template = get_block_file_template( $id, $template_type );

	/**
	 * Filters the queried block template object after it's been fetched.
	 *
	 * @since 5.9.0
	 *
	 * @param WP_Block_Template|null $block_template The found block template, or null if there isn't one.
	 * @param string                 $id             Template unique identifier (example: theme_slug//template_slug).
	 * @param array                  $template_type  Template type: `'wp_template'` or '`wp_template_part'`.
	 */
	return apply_filters( 'get_block_template', $block_template, $id, $template_type );
}

/**
 * Retrieves a single unified template object using its id.
 *
 * @since 5.9.0
 *
 * @param string $id            Template unique identifier (example: theme_slug//template_slug).
 * @param string $template_type Optional. Template type: `'wp_template'` or '`wp_template_part'`.
 *                              Default `'wp_template'`.
 * @return WP_Block_Template|null The found block template, or null if there isn't one.
 */
function get_block_file_template( $id, $template_type = 'wp_template' ) {
	/**
	 * Filters the block templates array before the query takes place.
	 *
	 * Return a non-null value to bypass the WordPress queries.
	 *
	 * @since 5.9.0
	 *
	 * @param WP_Block_Template|null $block_template Return block template object to short-circuit the default query,
	 *                                               or null to allow WP to run its normal queries.
	 * @param string                 $id             Template unique identifier (example: theme_slug//template_slug).
	 * @param string                 $template_type  Template type: `'wp_template'` or '`wp_template_part'`.
	 */
	$block_template = apply_filters( 'pre_get_block_file_template', null, $id, $template_type );
	if ( ! is_null( $block_template ) ) {
		return $block_template;
	}

	$parts = explode( '//', $id, 2 );
	if ( count( $parts ) < 2 ) {
		/** This filter is documented in wp-includes/block-template-utils.php */
		return apply_filters( 'get_block_file_template', null, $id, $template_type );
	}
	list( $theme, $slug ) = $parts;

	if ( wp_get_theme()->get_stylesheet() !== $theme ) {
		/** This filter is documented in wp-includes/block-template-utils.php */
		return apply_filters( 'get_block_file_template', null, $id, $template_type );
	}

	$template_file = _get_block_template_file( $template_type, $slug );
	if ( null === $template_file ) {
		/** This filter is documented in wp-includes/block-template-utils.php */
		return apply_filters( 'get_block_file_template', null, $id, $template_type );
	}

	$block_template = _build_block_template_result_from_file( $template_file, $template_type );

	/**
	 * Filters the array of queried block templates array after they've been fetched.
	 *
	 * @since 5.9.0
	 *
	 * @param WP_Block_Template|null $block_template The found block template, or null if there is none.
	 * @param string                 $id             Template unique identifier (example: theme_slug//template_slug).
	 * @param string                 $template_type  Template type: `'wp_template'` or '`wp_template_part'`.
	 */
	return apply_filters( 'get_block_file_template', $block_template, $id, $template_type );
}

/**
 * Print a template-part.
 *
 * @since 5.9.0
 *
 * @param string $part The template-part to print. Use "header" or "footer".
 */
function block_template_part( $part ) {
	$template_part = get_block_template( get_stylesheet() . '//' . $part, 'wp_template_part' );
	if ( ! $template_part || empty( $template_part->content ) ) {
		return;
	}
	echo do_blocks( $template_part->content );
}

/**
 * Print the header template-part.
 *
 * @since 5.9.0
 */
function block_header_area() {
	block_template_part( 'header' );
}

/**
 * Print the footer template-part.
 *
 * @since 5.9.0
 */
function block_footer_area() {
	block_template_part( 'footer' );
}

/**
 * Filters theme directories that should be ignored during export.
 *
 * @since 6.0.0
 *
 * @param string $path The path of the file in the theme.
 * @return Bool Whether this file is in an ignored directory.
 */
function wp_is_theme_directory_ignored( $path ) {
	$directories_to_ignore = array( '.svn', '.git', '.hg', '.bzr', 'node_modules', 'vendor' );
	foreach ( $directories_to_ignore as $directory ) {
		if ( strpos( $path, $directory ) === 0 ) {
			return true;
		}
	}

	return false;
}

/**
 * Creates an export of the current templates and
 * template parts from the site editor at the
 * specified path in a ZIP file.
 *
 * @since 5.9.0
 * @since 6.0.0 Adds the whole theme to the export archive.
 *
 * @return WP_Error|string Path of the ZIP file or error on failure.
 */
function wp_generate_block_templates_export_file() {
	if ( ! class_exists( 'ZipArchive' ) ) {
		return new WP_Error( 'missing_zip_package', __( 'Zip Export not supported.' ) );
	}

	$obscura    = wp_generate_password( 12, false, false );
	$theme_name = basename( get_stylesheet() );
	$filename   = get_temp_dir() . $theme_name . $obscura . '.zip';

	$zip = new ZipArchive();
	if ( true !== $zip->open( $filename, ZipArchive::CREATE | ZipArchive::OVERWRITE ) ) {
		return new WP_Error( 'unable_to_create_zip', __( 'Unable to open export file (archive) for writing.' ) );
	}

	$zip->addEmptyDir( 'templates' );
	$zip->addEmptyDir( 'parts' );

	// Get path of the theme.
	$theme_path = wp_normalize_path( get_stylesheet_directory() );

	// Create recursive directory iterator.
	$theme_files = new RecursiveIteratorIterator(
		new RecursiveDirectoryIterator( $theme_path ),
		RecursiveIteratorIterator::LEAVES_ONLY
	);

	// Make a copy of the current theme.
	foreach ( $theme_files as $file ) {
		// Skip directories as they are added automatically.
		if ( ! $file->isDir() ) {
			// Get real and relative path for current file.
			$file_path     = wp_normalize_path( $file );
			$relative_path = substr( $file_path, strlen( $theme_path ) + 1 );

			if ( ! wp_is_theme_directory_ignored( $relative_path ) ) {
				$zip->addFile( $file_path, $relative_path );
			}
		}
	}

	// Load templates into the zip file.
	$templates = get_block_templates();
	foreach ( $templates as $template ) {
		$template->content = _remove_theme_attribute_in_block_template_content( $template->content );

		$zip->addFromString(
			'templates/' . $template->slug . '.html',
			$template->content
		);
	}

	// Load template parts into the zip file.
	$template_parts = get_block_templates( array(), 'wp_template_part' );
	foreach ( $template_parts as $template_part ) {
		$zip->addFromString(
			'parts/' . $template_part->slug . '.html',
			$template_part->content
		);
	}

	// Load theme.json into the zip file.
	$tree = WP_Theme_JSON_Resolver::get_theme_data( array(), array( 'with_supports' => false ) );
	// Merge with user data.
	$tree->merge( WP_Theme_JSON_Resolver::get_user_data() );

	$theme_json_raw = $tree->get_data();
	// If a version is defined, add a schema.
	if ( $theme_json_raw['version'] ) {
		global $wp_version;
		$theme_json_version = 'wp/' . substr( $wp_version, 0, 3 );
		$schema             = array( '$schema' => 'https://schemas.wp.org/' . $theme_json_version . '/theme.json' );
		$theme_json_raw     = array_merge( $schema, $theme_json_raw );
	}

	// Convert to a string.
	$theme_json_encoded = wp_json_encode( $theme_json_raw, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE );

	// Replace 4 spaces with a tab.
	$theme_json_tabbed = preg_replace( '~(?:^|\G)\h{4}~m', "\t", $theme_json_encoded );

	// Add the theme.json file to the zip.
	$zip->addFromString(
		'theme.json',
		$theme_json_tabbed
	);

	// Save changes to the zip file.
	$zip->close();

	return $filename;
}