<?php
/**
* Server-side rendering of the `core/search` block.
*
* @package WordPress
*/

/**
* Dynamically renders the `core/search` block.
*
* @since 6.3.0 Using block.json `viewScript` to register script, and update `view_script_handles()` only when needed.
*
* @param array $attributes The block attributes.
* @param string $content The saved content.
* @param WP_Block $block The parsed block.
*
* @return string The search block markup.
*/
function render_block_core_search( $attributes ) {
// Older versions of the Search block defaulted the label and buttonText
// attributes to `__( 'Search' )` meaning that many posts contain `<!--
// wp:search /-->`. Support these by defaulting an undefined label and
// buttonText to `__( 'Search' )`.
$attributes = wp_parse_args(
$attributes,
array(
'label' => __( 'Search' ),
'buttonText' => __( 'Search' ),
)
);

$input_id = wp_unique_id( 'wp-block-search__input-' );
$classnames = classnames_for_block_core_search( $attributes );
$show_label = ! empty( $attributes['showLabel'] );
$use_icon_button = ! empty( $attributes['buttonUseIcon'] );
$show_button = ( ! empty( $attributes['buttonPosition'] ) && 'no-button' === $attributes['buttonPosition'] ) ? false : true;
$button_position = $show_button ? $attributes['buttonPosition'] : null;
$query_params = ( ! empty( $attributes['query'] ) ) ? $attributes['query'] : array();
$button = '';
$query_params_markup = '';
$inline_styles = styles_for_block_core_search( $attributes );
$color_classes = get_color_classes_for_block_core_search( $attributes );
$typography_classes = get_typography_classes_for_block_core_search( $attributes );
$is_button_inside = ! empty( $attributes['buttonPosition'] ) &&
'button-inside' === $attributes['buttonPosition'];
// Border color classes need to be applied to the elements that have a border color.
$border_color_classes = get_border_color_classes_for_block_core_search( $attributes );
// This variable is a constant and its value is always false at this moment.
// It is defined this way because some values depend on it, in case it changes in the future.
$open_by_default = false;

$label_inner_html = empty( $attributes['label'] ) ? __( 'Search' ) : wp_kses_post( $attributes['label'] );
$label = new WP_HTML_Tag_Processor( sprintf( '<label %1$s>%2$s</label>', $inline_styles['label'], $label_inner_html ) );
if ( $label->next_tag() ) {
$label->set_attribute( 'for', $input_id );
$label->add_class( 'wp-block-search__label' );
if ( $show_label && ! empty( $attributes['label'] ) ) {
if ( ! empty( $typography_classes ) ) {
$label->add_class( $typography_classes );
}
} else {
$label->add_class( 'screen-reader-text' );
}
}

$input = new WP_HTML_Tag_Processor( sprintf( '<input type="search" name="s" required %s/>', $inline_styles['input'] ) );
$input_classes = array( 'wp-block-search__input' );
if ( ! $is_button_inside && ! empty( $border_color_classes ) ) {
$input_classes[] = $border_color_classes;
}
if ( ! empty( $typography_classes ) ) {
$input_classes[] = $typography_classes;
}
if ( $input->next_tag() ) {
$input->add_class( implode( ' ', $input_classes ) );
$input->set_attribute( 'id', $input_id );
$input->set_attribute( 'value', get_search_query() );
$input->set_attribute( 'placeholder', $attributes['placeholder'] );

// If it's interactive, enqueue the script module and add the directives.
$is_expandable_searchfield = 'button-only' === $button_position;
if ( $is_expandable_searchfield ) {
wp_enqueue_script_module( '@wordpress/block-library/search/view' );

$input->set_attribute( 'data-wp-bind--aria-hidden', '!context.isSearchInputVisible' );
$input->set_attribute( 'data-wp-bind--tabindex', 'state.tabindex' );

// Adding these attributes manually is needed until the Interactivity API
// SSR logic is added to core.
$input->set_attribute( 'aria-hidden', 'true' );
$input->set_attribute( 'tabindex', '-1' );
}
}

if ( count( $query_params ) > 0 ) {
foreach ( $query_params as $param => $value ) {
$query_params_markup .= sprintf(
'<input type="hidden" name="%s" value="%s" />',
esc_attr( $param ),
esc_attr( $value )
);
}
}

if ( $show_button ) {
$button_classes = array( 'wp-block-search__button' );
$button_internal_markup = '';
if ( ! empty( $color_classes ) ) {
$button_classes[] = $color_classes;
}
if ( ! empty( $typography_classes ) ) {
$button_classes[] = $typography_classes;
}

if ( ! $is_button_inside && ! empty( $border_color_classes ) ) {
$button_classes[] = $border_color_classes;
}
if ( ! $use_icon_button ) {
if ( ! empty( $attributes['buttonText'] ) ) {
$button_internal_markup = wp_kses_post( $attributes['buttonText'] );
}
} else {
$button_classes[] = 'has-icon';
$button_internal_markup =
'<svg class="search-icon" viewBox="0 0 24 24" width="24" height="24">
<path d="M13 5c-3.3 0-6 2.7-6 6 0 1.4.5 2.7 1.3 3.7l-3.8 3.8 1.1 1.1 3.8-3.8c1 .8 2.3 1.3 3.7 1.3 3.3 0 6-2.7 6-6S16.3 5 13 5zm0 10.5c-2.5 0-4.5-2-4.5-4.5s2-4.5 4.5-4.5 4.5 2 4.5 4.5-2 4.5-4.5 4.5z"></path>
</svg>';
}

// Include the button element class.
$button_classes[] = wp_theme_get_element_class_name( 'button' );
$button = new WP_HTML_Tag_Processor( sprintf( '<button type="submit" %s>%s</button>', $inline_styles['button'], $button_internal_markup ) );

if ( $button->next_tag() ) {
$button->add_class( implode( ' ', $button_classes ) );
if ( 'button-only' === $attributes['buttonPosition'] ) {
$button->set_attribute( 'data-wp-bind--aria-label', 'state.ariaLabel' );
$button->set_attribute( 'data-wp-bind--aria-controls', 'state.ariaControls' );
$button->set_attribute( 'data-wp-bind--aria-expanded', 'context.isSearchInputVisible' );
$button->set_attribute( 'data-wp-bind--type', 'state.type' );
$button->set_attribute( 'data-wp-on--click', 'actions.openSearchInput' );

// Adding these attributes manually is needed until the Interactivity
// API SSR logic is added to core.
$button->set_attribute( 'aria-label', __( 'Expand search field' ) );
$button->set_attribute( 'aria-controls', 'wp-block-search__input-' . $input_id );
$button->set_attribute( 'aria-expanded', 'false' );
$button->set_attribute( 'type', 'button' );
} else {
$button->set_attribute( 'aria-label', wp_strip_all_tags( $attributes['buttonText'] ) );
}
}
}

$field_markup_classes = $is_button_inside ? $border_color_classes : '';
$field_markup = sprintf(
'<div class="wp-block-search__inside-wrapper %s" %s>%s</div>',
esc_attr( $field_markup_classes ),
$inline_styles['wrapper'],
$input . $query_params_markup . $button
);
$wrapper_attributes = get_block_wrapper_attributes(
array( 'class' => $classnames )
);
$form_directives = '';

// If it's interactive, add the directives.
if ( $is_expandable_searchfield ) {
$aria_label_expanded = __( 'Submit Search' );
$aria_label_collapsed = __( 'Expand search field' );
$form_context = wp_interactivity_data_wp_context(
array(
'isSearchInputVisible' => $open_by_default,
'inputId' => $input_id,
'ariaLabelExpanded' => $aria_label_expanded,
'ariaLabelCollapsed' => $aria_label_collapsed,
)
);
$form_directives = '
data-wp-interactive="core/search"
' . $form_context . '
data-wp-class--wp-block-search__searchfield-hidden="!context.isSearchInputVisible"
data-wp-on-async--keydown="actions.handleSearchKeydown"
data-wp-on-async--focusout="actions.handleSearchFocusout"
';
}

return sprintf(
'<form role="search" method="get" action="%1s" %2s %3s>%4s</form>',
esc_url( home_url( '/' ) ),
$wrapper_attributes,
$form_directives,
$label . $field_markup
);
}

/**
* Registers the `core/search` block on the server.
*
* @since 5.2.0
*/
function register_block_core_search() {
register_block_type_from_metadata(
__DIR__ . '/search',
array(
'render_callback' => 'render_block_core_search',
)
);
}
add_action( 'init', 'register_block_core_search' );

/**
* Builds the correct top level classnames for the 'core/search' block.
*
* @since 5.6.0
*
* @param array $attributes The block attributes.
*
* @return string The classnames used in the block.
*/
function classnames_for_block_core_search( $attributes ) {
$classnames = array();

if ( ! empty( $attributes['buttonPosition'] ) ) {
if ( 'button-inside' === $attributes['buttonPosition'] ) {
$classnames[] = 'wp-block-search__button-inside';
}

if ( 'button-outside' === $attributes['buttonPosition'] ) {
$classnames[] = 'wp-block-search__button-outside';
}

if ( 'no-button' === $attributes['buttonPosition'] ) {
$classnames[] = 'wp-block-search__no-button';
}

if ( 'button-only' === $attributes['buttonPosition'] ) {
$classnames[] = 'wp-block-search__button-only wp-block-search__searchfield-hidden';
}
}

if ( isset( $attributes['buttonUseIcon'] ) ) {
if ( ! empty( $attributes['buttonPosition'] ) && 'no-button' !== $attributes['buttonPosition'] ) {
if ( $attributes['buttonUseIcon'] ) {
$classnames[] = 'wp-block-search__icon-button';
} else {
$classnames[] = 'wp-block-search__text-button';
}
}
}

return implode( ' ', $classnames );
}

/**
* This generates a CSS rule for the given border property and side if provided.
* Based on whether the Search block is configured to display the button inside
* or not, the generated rule is injected into the appropriate collection of
* styles for later application in the block's markup.
*
* @since 6.1.0
*
* @param array $attributes The block attributes.
* @param string $property Border property to generate rule for e.g. width or color.
* @param string $side Optional side border. The dictates the value retrieved and final CSS property.
* @param array $wrapper_styles Current collection of wrapper styles.
* @param array $button_styles Current collection of button styles.
* @param array $input_styles Current collection of input styles.
*/
function apply_block_core_search_border_style( $attributes, $property, $side, &$wrapper_styles, &$button_styles, &$input_styles ) {
$is_button_inside = isset( $attributes['buttonPosition'] ) && 'button-inside' === $attributes['buttonPosition'];

$path = array( 'style', 'border', $property );

if ( $side ) {
array_splice( $path, 2, 0, $side );
}

$value = _wp_array_get( $attributes, $path, false );

if ( empty( $value ) ) {
return;
}

if ( 'color' === $property && $side ) {
$has_color_preset = str_contains( $value, 'var:preset|color|' );
if ( $has_color_preset ) {
$named_color_value = substr( $value, strrpos( $value, '|' ) + 1 );
$value = sprintf( 'var(--wp--preset--color--%s)', $named_color_value );
}
}

$property_suffix = $side ? sprintf( '%s-%s', $side, $property ) : $property;

if ( $is_button_inside ) {
$wrapper_styles[] = sprintf( 'border-%s: %s;', $property_suffix, esc_attr( $value ) );
} else {
$button_styles[] = sprintf( 'border-%s: %s;', $property_suffix, esc_attr( $value ) );
$input_styles[] = sprintf( 'border-%s: %s;', $property_suffix, esc_attr( $value ) );
}
}

/**
* This adds CSS rules for a given border property e.g. width or color. It
* injects rules into the provided wrapper, button and input style arrays for
* uniform "flat" borders or those with individual sides configured.
*
* @since 6.1.0
*
* @param array $attributes The block attributes.
* @param string $property Border property to generate rule for e.g. width or color.
* @param array $wrapper_styles Current collection of wrapper styles.
* @param array $button_styles Current collection of button styles.
* @param array $input_styles Current collection of input styles.
*/
function apply_block_core_search_border_styles( $attributes, $property, &$wrapper_styles, &$button_styles, &$input_styles ) {
apply_block_core_search_border_style( $attributes, $property, null, $wrapper_styles, $button_styles, $input_styles );
apply_block_core_search_border_style( $attributes, $property, 'top', $wrapper_styles, $button_styles, $input_styles );
apply_block_core_search_border_style( $attributes, $property, 'right', $wrapper_styles, $button_styles, $input_styles );
apply_block_core_search_border_style( $attributes, $property, 'bottom', $wrapper_styles, $button_styles, $input_styles );
apply_block_core_search_border_style( $attributes, $property, 'left', $wrapper_styles, $button_styles, $input_styles );
}

/**
* Builds an array of inline styles for the search block.
*
* The result will contain one entry for shared styles such as those for the
* inner input or button and a second for the inner wrapper should the block
* be positioning the button "inside".
*
* @since 5.8.0
*
* @param array $attributes The block attributes.
*
* @return array Style HTML attribute.
*/
function styles_for_block_core_search( $attributes ) {
$wrapper_styles = array();
$button_styles = array();
$input_styles = array();
$label_styles = array();
$is_button_inside = ! empty( $attributes['buttonPosition'] ) &&
'button-inside' === $attributes['buttonPosition'];
$show_label = ( isset( $attributes['showLabel'] ) ) && false !== $attributes['showLabel'];

// Add width styles.
$has_width = ! empty( $attributes['width'] ) && ! empty( $attributes['widthUnit'] );

if ( $has_width ) {
$wrapper_styles[] = sprintf(
'width: %d%s;',
esc_attr( $attributes['width'] ),
esc_attr( $attributes['widthUnit'] )
);
}

// Add border width and color styles.
apply_block_core_search_border_styles( $attributes, 'width', $wrapper_styles, $button_styles, $input_styles );
apply_block_core_search_border_styles( $attributes, 'color', $wrapper_styles, $button_styles, $input_styles );
apply_block_core_search_border_styles( $attributes, 'style', $wrapper_styles, $button_styles, $input_styles );

// Add border radius styles.
$has_border_radius = ! empty( $attributes['style']['border']['radius'] );

if ( $has_border_radius ) {
$default_padding = '4px';
$border_radius = $attributes['style']['border']['radius'];

if ( is_array( $border_radius ) ) {
// Apply styles for individual corner border radii.
foreach ( $border_radius as $key => $value ) {
if ( null !== $value ) {
// Convert camelCase key to kebab-case.
$name = strtolower( preg_replace( '/(?<!^)[A-Z]/', '-$0', $key ) );

// Add shared styles for individual border radii for input & button.
$border_style = sprintf(
'border-%s-radius: %s;',
esc_attr( $name ),
esc_attr( $value )
);
$input_styles[] = $border_style;
$button_styles[] = $border_style;

// Add adjusted border radius styles for the wrapper element
// if button is positioned inside.
if ( $is_button_inside && intval( $value ) !== 0 ) {
$wrapper_styles[] = sprintf(
'border-%s-radius: calc(%s + %s);',
esc_attr( $name ),
esc_attr( $value ),
$default_padding
);
}
}
}
} else {
// Numeric check is for backwards compatibility purposes.
$border_radius = is_numeric( $border_radius ) ? $border_radius . 'px' : $border_radius;
$border_style = sprintf( 'border-radius: %s;', esc_attr( $border_radius ) );
$input_styles[] = $border_style;
$button_styles[] = $border_style;

if ( $is_button_inside && intval( $border_radius ) !== 0 ) {
// Adjust wrapper border radii to maintain visual consistency
// with inner elements when button is positioned inside.
$wrapper_styles[] = sprintf(
'border-radius: calc(%s + %s);',
esc_attr( $border_radius ),
$default_padding
);
}
}
}

// Add color styles.
$has_text_color = ! empty( $attributes['style']['color']['text'] );
if ( $has_text_color ) {
$button_styles[] = sprintf( 'color: %s;', $attributes['style']['color']['text'] );
}

$has_background_color = ! empty( $attributes['style']['color']['background'] );
if ( $has_background_color ) {
$button_styles[] = sprintf( 'background-color: %s;', $attributes['style']['color']['background'] );
}

$has_custom_gradient = ! empty( $attributes['style']['color']['gradient'] );
if ( $has_custom_gradient ) {
$button_styles[] = sprintf( 'background: %s;', $attributes['style']['color']['gradient'] );
}

// Get typography styles to be shared across inner elements.
$typography_styles = esc_attr( get_typography_styles_for_block_core_search( $attributes ) );
if ( ! empty( $typography_styles ) ) {
$label_styles [] = $typography_styles;
$button_styles[] = $typography_styles;
$input_styles [] = $typography_styles;
}

// Typography text-decoration is only applied to the label and button.
if ( ! empty( $attributes['style']['typography']['textDecoration'] ) ) {
$text_decoration_value = sprintf( 'text-decoration: %s;', esc_attr( $attributes['style']['typography']['textDecoration'] ) );
$button_styles[] = $text_decoration_value;
// Input opts out of text decoration.
if ( $show_label ) {
$label_styles[] = $text_decoration_value;
}
}

return array(
'input' => ! empty( $input_styles ) ? sprintf( ' style="%s"', esc_attr( safecss_filter_attr( implode( ' ', $input_styles ) ) ) ) : '',
'button' => ! empty( $button_styles ) ? sprintf( ' style="%s"', esc_attr( safecss_filter_attr( implode( ' ', $button_styles ) ) ) ) : '',
'wrapper' => ! empty( $wrapper_styles ) ? sprintf( ' style="%s"', esc_attr( safecss_filter_attr( implode( ' ', $wrapper_styles ) ) ) ) : '',
'label' => ! empty( $label_styles ) ? sprintf( ' style="%s"', esc_attr( safecss_filter_attr( implode( ' ', $label_styles ) ) ) ) : '',
);
}

/**
* Returns typography classnames depending on whether there are named font sizes/families.
*
* @since 6.1.0
*
* @param array $attributes The block attributes.
*
* @return string The typography color classnames to be applied to the block elements.
*/
function get_typography_classes_for_block_core_search( $attributes ) {
$typography_classes = array();
$has_named_font_family = ! empty( $attributes['fontFamily'] );
$has_named_font_size = ! empty( $attributes['fontSize'] );

if ( $has_named_font_size ) {
$typography_classes[] = sprintf( 'has-%s-font-size', esc_attr( $attributes['fontSize'] ) );
}

if ( $has_named_font_family ) {
$typography_classes[] = sprintf( 'has-%s-font-family', esc_attr( $attributes['fontFamily'] ) );
}

return implode( ' ', $typography_classes );
}

/**
* Returns typography styles to be included in an HTML style tag.
* This excludes text-decoration, which is applied only to the label and button elements of the search block.
*
* @since 6.1.0
*
* @param array $attributes The block attributes.
*
* @return string A string of typography CSS declarations.
*/
function get_typography_styles_for_block_core_search( $attributes ) {
$typography_styles = array();

// Add typography styles.
if ( ! empty( $attributes['style']['typography']['fontSize'] ) ) {
$typography_styles[] = sprintf(
'font-size: %s;',
wp_get_typography_font_size_value(
array(
'size' => $attributes['style']['typography']['fontSize'],
)
)
);

}

if ( ! empty( $attributes['style']['typography']['fontFamily'] ) ) {
$typography_styles[] = sprintf( 'font-family: %s;', $attributes['style']['typography']['fontFamily'] );
}

if ( ! empty( $attributes['style']['typography']['letterSpacing'] ) ) {
$typography_styles[] = sprintf( 'letter-spacing: %s;', $attributes['style']['typography']['letterSpacing'] );
}

if ( ! empty( $attributes['style']['typography']['fontWeight'] ) ) {
$typography_styles[] = sprintf( 'font-weight: %s;', $attributes['style']['typography']['fontWeight'] );
}

if ( ! empty( $attributes['style']['typography']['fontStyle'] ) ) {
$typography_styles[] = sprintf( 'font-style: %s;', $attributes['style']['typography']['fontStyle'] );
}

if ( ! empty( $attributes['style']['typography']['lineHeight'] ) ) {
$typography_styles[] = sprintf( 'line-height: %s;', $attributes['style']['typography']['lineHeight'] );
}

if ( ! empty( $attributes['style']['typography']['textTransform'] ) ) {
$typography_styles[] = sprintf( 'text-transform: %s;', $attributes['style']['typography']['textTransform'] );
}

return implode( '', $typography_styles );
}

/**
* Returns border color classnames depending on whether there are named or custom border colors.
*
* @since 5.9.0
*
* @param array $attributes The block attributes.
*
* @return string The border color classnames to be applied to the block elements.
*/
function get_border_color_classes_for_block_core_search( $attributes ) {
$border_color_classes = array();
$has_custom_border_color = ! empty( $attributes['style']['border']['color'] );
$has_named_border_color = ! empty( $attributes['borderColor'] );

if ( $has_custom_border_color || $has_named_border_color ) {
$border_color_classes[] = 'has-border-color';
}

if ( $has_named_border_color ) {
$border_color_classes[] = sprintf( 'has-%s-border-color', esc_attr( $attributes['borderColor'] ) );
}

return implode( ' ', $border_color_classes );
}

/**
* Returns color classnames depending on whether there are named or custom text and background colors.
*
* @since 5.9.0
*
* @param array $attributes The block attributes.
*
* @return string The color classnames to be applied to the block elements.
*/
function get_color_classes_for_block_core_search( $attributes ) {
$classnames = array();

// Text color.
$has_named_text_color = ! empty( $attributes['textColor'] );
$has_custom_text_color = ! empty( $attributes['style']['color']['text'] );
if ( $has_named_text_color ) {
$classnames[] = sprintf( 'has-text-color has-%s-color', $attributes['textColor'] );
} elseif ( $has_custom_text_color ) {
// If a custom 'textColor' was selected instead of a preset, still add the generic `has-text-color` class.
$classnames[] = 'has-text-color';
}

// Background color.
$has_named_background_color = ! empty( $attributes['backgroundColor'] );
$has_custom_background_color = ! empty( $attributes['style']['color']['background'] );
$has_named_gradient = ! empty( $attributes['gradient'] );
$has_custom_gradient = ! empty( $attributes['style']['color']['gradient'] );
if (
$has_named_background_color ||
$has_custom_background_color ||
$has_named_gradient ||
$has_custom_gradient
) {
$classnames[] = 'has-background';
}
if ( $has_named_background_color ) {
$classnames[] = sprintf( 'has-%s-background-color', $attributes['backgroundColor'] );
}
if ( $has_named_gradient ) {
$classnames[] = sprintf( 'has-%s-gradient-background', $attributes['gradient'] );
}

return implode( ' ', $classnames );
}