<?php

/**

 * Server-side rendering of the `core/navigation-submenu` block.

 *

 * @package WordPress

 */

/**

 * Build an array with CSS classes and inline styles defining the font sizes

 * which will be applied to the navigation markup in the front-end.

 *

 * @since 5.9.0

 *

 * @param  array $context Navigation block context.

 * @return array Font size CSS classes and inline styles.

 */

function block_core_navigation_submenu_build_css_font_sizes( $context ) {

	// CSS classes.

	$font_sizes = array(

		'css_classes'   => array(),

		'inline_styles' => '',

	);

	$has_named_font_size  = array_key_exists( 'fontSize', $context );

	$has_custom_font_size = isset( $context['style']['typography']['fontSize'] );

	if ( $has_named_font_size ) {

		// Add the font size class.

		$font_sizes['css_classes'][] = sprintf( 'has-%s-font-size', $context['fontSize'] );

	} elseif ( $has_custom_font_size ) {

		// Add the custom font size inline style.

		$font_sizes['inline_styles'] = sprintf(

			'font-size: %s;',

			wp_get_typography_font_size_value(

				array(

					'size' => $context['style']['typography']['fontSize'],

				)

			)

		);

	}

	return $font_sizes;

}

/**

 * Returns the top-level submenu SVG chevron icon.

 *

 * @since 5.9.0

 *

 * @return string

 */

function block_core_navigation_submenu_render_submenu_icon() {

	return '<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12" fill="none" aria-hidden="true" focusable="false"><path d="M1.50002 4L6.00002 8L10.5 4" stroke-width="1.5"></path></svg>';

}

/**

 * Renders the `core/navigation-submenu` block.

 *

 * @since 5.9.0

 *

 * @param array    $attributes The block attributes.

 * @param string   $content    The saved content.

 * @param WP_Block $block      The parsed block.

 *

 * @return string Returns the post content with the legacy widget added.

 */

function render_block_core_navigation_submenu( $attributes, $content, $block ) {

	$navigation_link_has_id = isset( $attributes['id'] ) && is_numeric( $attributes['id'] );

	$is_post_type           = isset( $attributes['kind'] ) && 'post-type' === $attributes['kind'];

	$is_post_type           = $is_post_type || isset( $attributes['type'] ) && ( 'post' === $attributes['type'] || 'page' === $attributes['type'] );

	// Don't render the block's subtree if it is a draft.

	if ( $is_post_type && $navigation_link_has_id && 'publish' !== get_post_status( $attributes['id'] ) ) {

		return '';

	}

	// Don't render the block's subtree if it has no label.

	if ( empty( $attributes['label'] ) ) {

		return '';

	}

	$font_sizes      = block_core_navigation_submenu_build_css_font_sizes( $block->context );

	$style_attribute = $font_sizes['inline_styles'];

	$has_submenu = count( $block->inner_blocks ) > 0;

	$kind        = empty( $attributes['kind'] ) ? 'post_type' : str_replace( '-', '_', $attributes['kind'] );

	$is_active   = ! empty( $attributes['id'] ) && get_queried_object_id() === (int) $attributes['id'] && ! empty( get_queried_object()->$kind );

	if ( is_post_type_archive() ) {

		$queried_archive_link = get_post_type_archive_link( get_queried_object()->name );

		if ( $attributes['url'] === $queried_archive_link ) {

			$is_active = true;

		}

	}

	$show_submenu_indicators = isset( $block->context['showSubmenuIcon'] ) && $block->context['showSubmenuIcon'];

	$open_on_click           = isset( $block->context['openSubmenusOnClick'] ) && $block->context['openSubmenusOnClick'];

	$open_on_hover_and_click = isset( $block->context['openSubmenusOnClick'] ) && ! $block->context['openSubmenusOnClick'] &&

		$show_submenu_indicators;

	$wrapper_attributes = get_block_wrapper_attributes(

		array(

			'style' => $style_attribute,

		)

	);

	$label = '';

	if ( isset( $attributes['label'] ) ) {

		$label .= wp_kses_post( $attributes['label'] );

	}

	$aria_label = sprintf(

		/* translators: Accessibility text. %s: Parent page title. */

		__( '%s submenu' ),

		wp_strip_all_tags( $label )

	);

	$html = '<li ' . $wrapper_attributes . '>';

	// If Submenus open on hover, we render an anchor tag with attributes.

	// If submenu icons are set to show, we also render a submenu button, so the submenu can be opened on click.

	if ( ! $open_on_click ) {

		$item_url = isset( $attributes['url'] ) ? $attributes['url'] : '';

		// Start appending HTML attributes to anchor tag.

		$html .= '<a class="wp-block-navigation-item__content"';

		// The href attribute on a and area elements is not required;

		// when those elements do not have href attributes they do not create hyperlinks.

		// But also The href attribute must have a value that is a valid URL potentially

		// surrounded by spaces.

		// see: https://html.spec.whatwg.org/multipage/links.html#links-created-by-a-and-area-elements.

		if ( ! empty( $item_url ) ) {

			$html .= ' href="' . esc_url( $item_url ) . '"';

		}

		if ( $is_active ) {

			$html .= ' aria-current="page"';

		}

		if ( isset( $attributes['opensInNewTab'] ) && true === $attributes['opensInNewTab'] ) {

			$html .= ' target="_blank"  ';

		}

		if ( isset( $attributes['rel'] ) ) {

			$html .= ' rel="' . esc_attr( $attributes['rel'] ) . '"';

		} elseif ( isset( $attributes['nofollow'] ) && $attributes['nofollow'] ) {

			$html .= ' rel="nofollow"';

		}

		if ( isset( $attributes['title'] ) ) {

			$html .= ' title="' . esc_attr( $attributes['title'] ) . '"';

		}

		$html .= '>';

		// End appending HTML attributes to anchor tag.

		$html .= $label;

		$html .= '</a>';

		// End anchor tag content.

		if ( $show_submenu_indicators ) {

			// The submenu icon is rendered in a button here

			// so that there's a clickable element to open the submenu.

			$html .= '<button aria-label="' . esc_attr( $aria_label ) . '" class="wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle" aria-expanded="false">' . block_core_navigation_submenu_render_submenu_icon() . '</button>';

		}

	} else {

		// If menus open on click, we render the parent as a button.

		$html .= '<button aria-label="' . esc_attr( $aria_label ) . '" class="wp-block-navigation-item__content wp-block-navigation-submenu__toggle" aria-expanded="false">';

		// Wrap title with span to isolate it from submenu icon.

		$html .= '<span class="wp-block-navigation-item__label">';

		$html .= $label;

		$html .= '</span>';

		$html .= '</button>';

		$html .= '<span class="wp-block-navigation__submenu-icon">' . block_core_navigation_submenu_render_submenu_icon() . '</span>';

	}

	if ( $has_submenu ) {

		// Copy some attributes from the parent block to this one.

		// Ideally this would happen in the client when the block is created.

		if ( array_key_exists( 'overlayTextColor', $block->context ) ) {

			$attributes['textColor'] = $block->context['overlayTextColor'];

		}

		if ( array_key_exists( 'overlayBackgroundColor', $block->context ) ) {

			$attributes['backgroundColor'] = $block->context['overlayBackgroundColor'];

		}

		if ( array_key_exists( 'customOverlayTextColor', $block->context ) ) {

			$attributes['style']['color']['text'] = $block->context['customOverlayTextColor'];

		}

		if ( array_key_exists( 'customOverlayBackgroundColor', $block->context ) ) {

			$attributes['style']['color']['background'] = $block->context['customOverlayBackgroundColor'];

		}

		// This allows us to be able to get a response from wp_apply_colors_support.

		$block->block_type->supports['color'] = true;

		$colors_supports                      = wp_apply_colors_support( $block->block_type, $attributes );

		$css_classes                          = 'wp-block-navigation__submenu-container';

		if ( array_key_exists( 'class', $colors_supports ) ) {

			$css_classes .= ' ' . $colors_supports['class'];

		}

		$style_attribute = '';

		if ( array_key_exists( 'style', $colors_supports ) ) {

			$style_attribute = $colors_supports['style'];

		}

		$inner_blocks_html = '';

		foreach ( $block->inner_blocks as $inner_block ) {

			$inner_blocks_html .= $inner_block->render();

		}

		if ( strpos( $inner_blocks_html, 'current-menu-item' ) ) {

			$tag_processor = new WP_HTML_Tag_Processor( $html );

				$tag_processor->add_class( 'current-menu-ancestor' );

			}

			$html = $tag_processor->get_updated_html();

		}

		$wrapper_attributes = get_block_wrapper_attributes(

			array(

				'class' => $css_classes,

				'style' => $style_attribute,

			)

		);

		$html .= sprintf(

			'<ul %s>%s</ul>',

			$wrapper_attributes,

			$inner_blocks_html

		);

	}

	$html .= '</li>';

	return $html;

}

/**

 * Register the navigation submenu block.

 *

 * @since 5.9.0

 *

 * @uses render_block_core_navigation_submenu()

 * @throws WP_Error An WP_Error exception parsing the block definition.

 */

function register_block_core_navigation_submenu() {

	register_block_type_from_metadata(

		__DIR__ . '/navigation-submenu',

		array(

			'render_callback' => 'render_block_core_navigation_submenu',

		)

	);

}

add_action( 'init', 'register_block_core_navigation_submenu' );