1<?php
  2/**
  3 * Server-side rendering of the `core/home-link` block.
  4 *
  5 * @package WordPress
  6 */
  7
  8/**
  9 * Build an array with CSS classes and inline styles defining the colors
 10 * which will be applied to the home link markup in the front-end.
 11 *
 12 * @since 6.0.0
 13 *
 14 * @param  array $context home link block context.
 15 * @return array Colors CSS classes and inline styles.
 16 */
 17function block_core_home_link_build_css_colors( $context ) {
 18	$colors = array(
 19		'css_classes'   => array(),
 20		'inline_styles' => '',
 21	);
 22
 23	// Text color.
 24	$has_named_text_color  = array_key_exists( 'textColor', $context );
 25	$has_custom_text_color = isset( $context['style']['color']['text'] );
 26
 27	// If has text color.
 28	if ( $has_custom_text_color || $has_named_text_color ) {
 29		// Add has-text-color class.
 30		$colors['css_classes'][] = 'has-text-color';
 31	}
 32
 33	if ( $has_named_text_color ) {
 34		// Add the color class.
 35		$colors['css_classes'][] = sprintf( 'has-%s-color', $context['textColor'] );
 36	} elseif ( $has_custom_text_color ) {
 37		// Add the custom color inline style.
 38		$colors['inline_styles'] .= sprintf( 'color: %s;', $context['style']['color']['text'] );
 39	}
 40
 41	// Background color.
 42	$has_named_background_color  = array_key_exists( 'backgroundColor', $context );
 43	$has_custom_background_color = isset( $context['style']['color']['background'] );
 44
 45	// If has background color.
 46	if ( $has_custom_background_color || $has_named_background_color ) {
 47		// Add has-background class.
 48		$colors['css_classes'][] = 'has-background';
 49	}
 50
 51	if ( $has_named_background_color ) {
 52		// Add the background-color class.
 53		$colors['css_classes'][] = sprintf( 'has-%s-background-color', $context['backgroundColor'] );
 54	} elseif ( $has_custom_background_color ) {
 55		// Add the custom background-color inline style.
 56		$colors['inline_styles'] .= sprintf( 'background-color: %s;', $context['style']['color']['background'] );
 57	}
 58
 59	return $colors;
 60}
 61
 62/**
 63 * Build an array with CSS classes and inline styles defining the font sizes
 64 * which will be applied to the home link markup in the front-end.
 65 *
 66 * @since 6.0.0
 67 *
 68 * @param  array $context Home link block context.
 69 * @return array Font size CSS classes and inline styles.
 70 */
 71function block_core_home_link_build_css_font_sizes( $context ) {
 72	// CSS classes.
 73	$font_sizes = array(
 74		'css_classes'   => array(),
 75		'inline_styles' => '',
 76	);
 77
 78	$has_named_font_size  = array_key_exists( 'fontSize', $context );
 79	$has_custom_font_size = isset( $context['style']['typography']['fontSize'] );
 80
 81	if ( $has_named_font_size ) {
 82		// Add the font size class.
 83		$font_sizes['css_classes'][] = sprintf( 'has-%s-font-size', $context['fontSize'] );
 84	} elseif ( $has_custom_font_size ) {
 85		// Add the custom font size inline style.
 86		$font_sizes['inline_styles'] = sprintf( 'font-size: %s;', $context['style']['typography']['fontSize'] );
 87	}
 88
 89	return $font_sizes;
 90}
 91
 92/**
 93 * Builds an array with classes and style for the li wrapper
 94 *
 95 * @since 6.0.0
 96 *
 97 * @param  array $context    Home link block context.
 98 * @return string The li wrapper attributes.
 99 */
100function block_core_home_link_build_li_wrapper_attributes( $context ) {
101	$colors          = block_core_home_link_build_css_colors( $context );
102	$font_sizes      = block_core_home_link_build_css_font_sizes( $context );
103	$classes         = array_merge(
104		$colors['css_classes'],
105		$font_sizes['css_classes']
106	);
107	$style_attribute = ( $colors['inline_styles'] . $font_sizes['inline_styles'] );
108	$classes[]       = 'wp-block-navigation-item';
109
110	if ( is_front_page() ) {
111		$classes[] = 'current-menu-item';
112	} elseif ( is_home() && ( (int) get_option( 'page_for_posts' ) !== get_queried_object_id() ) ) {
113		// Edge case where the Reading settings has a posts page set but not a static homepage.
114		$classes[] = 'current-menu-item';
115	}
116
117	$wrapper_attributes = get_block_wrapper_attributes(
118		array(
119			'class' => implode( ' ', $classes ),
120			'style' => $style_attribute,
121		)
122	);
123
124	return $wrapper_attributes;
125}
126
127/**
128 * Renders the `core/home-link` block.
129 *
130 * @since 6.0.0
131 *
132 * @param array    $attributes The block attributes.
133 * @param string   $content    The saved content.
134 * @param WP_Block $block      The parsed block.
135 *
136 * @return string Returns the post content with the home url added.
137 */
138function render_block_core_home_link( $attributes, $content, $block ) {
139	if ( empty( $attributes['label'] ) ) {
140		$attributes['label'] = __( 'Home' );
141	}
142	$aria_current = '';
143
144	if ( is_front_page() ) {
145		$aria_current = ' aria-current="page"';
146	} elseif ( is_home() && ( (int) get_option( 'page_for_posts' ) !== get_queried_object_id() ) ) {
147		// Edge case where the Reading settings has a posts page set but not a static homepage.
148		$aria_current = ' aria-current="page"';
149	}
150
151	return sprintf(
152		'<li %1$s><a class="wp-block-home-link__content wp-block-navigation-item__content" href="%2$s" rel="home"%3$s>%4$s</a></li>',
153		block_core_home_link_build_li_wrapper_attributes( $block->context ),
154		esc_url( home_url() ),
155		$aria_current,
156		wp_kses_post( $attributes['label'] )
157	);
158}
159
160/**
161 * Register the home block
162 *
163 * @since 6.0.0
164 *
165 * @uses render_block_core_home_link()
166 * @throws WP_Error An WP_Error exception parsing the block definition.
167 */
168function register_block_core_home_link() {
169	register_block_type_from_metadata(
170		__DIR__ . '/home-link',
171		array(
172			'render_callback' => 'render_block_core_home_link',
173		)
174	);
175}
176add_action( 'init', 'register_block_core_home_link' );
177