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<?php |
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/** |
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* Gutenberg Block implementation. |
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* |
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* @package samePosts. |
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* |
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* @since 4.9 |
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*/ |
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|
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namespace samePosts; |
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|
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require_once __DIR__ . '/includes/block-attributes.php'; |
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|
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/** |
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* Markup wrapping the title in the block. |
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* |
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* The classic widget gets before_title / after_title from the sidebar it sits |
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* in. A block has no such args, so it brings its own wrapper. |
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*/ |
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const BLOCK_BEFORE_TITLE = '<h2 class="widget-title">'; |
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const BLOCK_AFTER_TITLE = '</h2>'; |
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|
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/** |
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* Renders the `tiptip/same-posts-block` on the server. |
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* |
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* Uses the same render core as the classic widget, so both produce the same |
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* list. The attributes are translated into a widget instance first -- see |
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* includes/block-attributes.php for why that step cannot be skipped. |
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* |
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* @param array $attributes The block attributes. |
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* @param string $content The block's inner content, unused. |
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* @param \WP_Block $block The block instance, carries the postId context. |
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* |
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* @return string The rendered block content. |
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*/ |
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function render_same_posts_block( $attributes, $content = '', $block = null ) { |
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$current_post_id = current_post_id( $block ); |
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|
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// Nothing to relate to: no post, and not a term archive either. |
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if ( ! $current_post_id && ! is_archive() ) { |
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return ''; |
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} |
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|
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$widget = new Widget(); |
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$instance = block_attributes_to_instance( $attributes ); |
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|
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$html = $widget->render_html( $instance, $current_post_id, BLOCK_BEFORE_TITLE, BLOCK_AFTER_TITLE ); |
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|
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if ( '' === $html ) { |
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return ''; |
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} |
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|
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return sprintf( '<div %1$s>%2$s</div>', get_block_wrapper_attributes(), $html ); |
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} |
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|
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/** |
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* Determines the post the block relates to. |
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* |
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* Three contexts have to be served: |
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* |
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* - a term archive, where the queried term rather than a post is the basis of |
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* the query -- 0 tells the render core to use the queried object; |
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* - a single post or a post template, where the postId context is set; |
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* - the editor's preview, which arrives through the block-renderer REST route |
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* without any query context. WordPress sets up the post from the post_id |
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* that ServerSideRender sends along, so get_the_ID() answers there too. |
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* |
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* @param \WP_Block|null $block The block instance. |
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* |
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* @return int The post id, or 0 when there is none. |
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*/ |
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function current_post_id( $block ) { |
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if ( is_archive() ) { |
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return 0; |
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} |
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|
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if ( $block instanceof \WP_Block && isset( $block->context['postId'] ) ) { |
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return (int) $block->context['postId']; |
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} |
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|
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return (int) get_the_ID(); |
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} |
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|
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/** |
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* Registers the block using the metadata loaded from the `block.json` file. |
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* Behind the scenes, it registers also all assets so they can be enqueued |
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* through the block editor in the corresponding context. |
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* |
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* @see https://developer.wordpress.org/block-editor/tutorials/block-tutorial/writing-your-first-block-type/ |
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*/ |
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function same_posts_block_init() { |
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register_block_type( |
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__DIR__, |
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array( |
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'render_callback' => __NAMESPACE__ . '\render_same_posts_block', |
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) |
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); |
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} |
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add_action( 'init', __NAMESPACE__ . '\same_posts_block_init' ); |
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|
