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

/**
 * Renders the `core/icon` block on server.
 *
 * @since 7.0.0
 *
 * @param array    $attributes The block attributes.
 * @param string   $content    The block content.
 * @param WP_Block $block      The block instance.
 *
 * @return string Returns the Icon.
 */
function render_block_core_icon( $attributes ) {
    if ( empty( $attributes['icon'] ) ) {
        return;
    }

    $registry = WP_Icons_Registry::get_instance();
    $icon     = $registry->get_registered_icon( $attributes['icon'] );

    if ( is_null( $icon ) ) {
        return;
    }

    // Text color and background color.
    $color_styles = array();

    $preset_text_color    = array_key_exists( 'textColor', $attributes ) ? "var:preset|color|{$attributes['textColor']}" : null;
    $custom_text_color    = $attributes['style']['color']['text'] ?? null;
    $color_styles['text'] = $preset_text_color ? $preset_text_color : $custom_text_color;

    $preset_background_color    = array_key_exists( 'backgroundColor', $attributes ) ? "var:preset|color|{$attributes['backgroundColor']}" : null;
    $custom_background_color    = $attributes['style']['color']['background'] ?? null;
    $color_styles['background'] = $preset_background_color ? $preset_background_color : $custom_background_color;

    // Border.
    $border_styles = array();
    $sides         = array( 'top', 'right', 'bottom', 'left' );

    if ( isset( $attributes['style']['border']['radius'] ) ) {
        $border_styles['radius'] = $attributes['style']['border']['radius'];
    }
    if ( isset( $attributes['style']['border']['style'] ) ) {
        $border_styles['style'] = $attributes['style']['border']['style'];
    }
    if ( isset( $attributes['style']['border']['width'] ) ) {
        $border_styles['width'] = $attributes['style']['border']['width'];
    }

    $preset_color           = array_key_exists( 'borderColor', $attributes ) ? "var:preset|color|{$attributes['borderColor']}" : null;
    $custom_color           = $attributes['style']['border']['color'] ?? null;
    $border_styles['color'] = $preset_color ? $preset_color : $custom_color;

    foreach ( $sides as $side ) {
        $border                 = $attributes['style']['border'][ $side ] ?? null;
        $border_styles[ $side ] = array(
            'color' => $border['color'] ?? null,
            'style' => $border['style'] ?? null,
            'width' => $border['width'] ?? null,
        );
    }

    // Spacing (Padding).
    $spacing_styles = array();
    if ( isset( $attributes['style']['spacing']['padding'] ) ) {
        $spacing_styles['padding'] = $attributes['style']['spacing']['padding'];
    }

    // Dimensions (Width).
    $dimensions_styles = array();
    if ( isset( $attributes['style']['dimensions']['width'] ) ) {
        $dimensions_styles['width'] = $attributes['style']['dimensions']['width'];
    }

    // Generate styles and classes.
    $styles = wp_style_engine_get_styles(
        array(
            'color'      => $color_styles,
            'border'     => $border_styles,
            'spacing'    => $spacing_styles,
            'dimensions' => $dimensions_styles,
        ),
    );

    $processor = new WP_HTML_Tag_Processor( $icon['content'] );
    $processor->next_tag( 'svg' );

    if ( ! empty( $styles['css'] ) ) {
        $processor->set_attribute( 'style', $styles['css'] );
    }
    if ( ! empty( $styles['classnames'] ) ) {
        $processor->add_class( $styles['classnames'] );
    }

    $aria_label = ! empty( $attributes['ariaLabel'] ) ? $attributes['ariaLabel'] : '';

    if ( ! $aria_label ) {
        // Icon is decorative, hide it from screen readers.
        $processor->set_attribute( 'aria-hidden', 'true' );
        $processor->set_attribute( 'focusable', 'false' );
    } else {
        $processor->set_attribute( 'role', 'img' );
        $processor->set_attribute( 'aria-label', $aria_label );
    }

    // Return the updated SVG markup.
    $svg        = $processor->get_updated_html();
    $attributes = get_block_wrapper_attributes();
    return sprintf( '<div %s>%s</div>', $attributes, $svg );
}


/**
 * Registers the `core/icon` block on server.
 *
 * @since 7.0.0
 */
function register_block_core_icon() {
    register_block_type_from_metadata(
        __DIR__ . '/icon',
        array(
            'render_callback' => 'render_block_core_icon',
        )
    );
}
add_action( 'init', 'register_block_core_icon' );