<?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;

$classes = array(
'wp-block-navigation-item',
);
$classes = array_merge(
$classes,
$font_sizes['css_classes']
);
if ( $has_submenu ) {
$classes[] = 'has-child';
}
if ( $open_on_click ) {
$classes[] = 'open-on-click';
}
if ( $open_on_hover_and_click ) {
$classes[] = 'open-on-hover-click';
}
if ( $is_active ) {
$classes[] = 'current-menu-item';
}

$wrapper_attributes = get_block_wrapper_attributes(
array(
'class' => implode( ' ', $classes ),
'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 .= '<span class="wp-block-navigation-item__label">';
$html .= $label;
$html .= '</span>';

// Add description if available.
if ( ! empty( $attributes['description'] ) ) {
$html .= '<span class="wp-block-navigation-item__description">';
$html .= wp_kses_post( $attributes['description'] );
$html .= '</span>';
}

$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>';

// Add description if available.
if ( ! empty( $attributes['description'] ) ) {
$html .= '<span class="wp-block-navigation-item__description">';
$html .= wp_kses_post( $attributes['description'] );
$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 );
while ( $tag_processor->next_tag( array( 'class_name' => 'wp-block-navigation-item' ) ) ) {
$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' );