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<?php |
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/** |
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* Server-side rendering of the `core/footnotes` block. |
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* |
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* @package WordPress |
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*/ |
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|
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/** |
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* Renders the `core/footnotes` block on the server. |
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* |
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* @param array $attributes Block attributes. |
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* @param string $content Block default content. |
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* @param WP_Block $block Block instance. |
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* |
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* @return string Returns the HTML representing the footnotes. |
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*/ |
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function gutenberg_render_block_core_footnotes( $attributes, $content, $block ) { |
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// Bail out early if the post ID is not set for some reason. |
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if ( empty( $block->context['postId'] ) ) { |
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return ''; |
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} |
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|
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if ( post_password_required( $block->context['postId'] ) ) { |
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return; |
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} |
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|
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$footnotes = get_post_meta( $block->context['postId'], 'footnotes', true ); |
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|
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if ( ! $footnotes ) { |
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return; |
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} |
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|
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$footnotes = json_decode( $footnotes, true ); |
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|
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if ( count( $footnotes ) === 0 ) { |
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return ''; |
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} |
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|
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$wrapper_attributes = get_block_wrapper_attributes(); |
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|
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$block_content = ''; |
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|
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foreach ( $footnotes as $footnote ) { |
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$block_content .= sprintf( |
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'<li id="%1$s">%2$s <a href="#%1$s-link">↩︎</a></li>', |
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$footnote['id'], |
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$footnote['content'] |
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); |
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} |
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|
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return sprintf( |
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'<ol %1$s>%2$s</ol>', |
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$wrapper_attributes, |
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$block_content |
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); |
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} |
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|
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/** |
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* Registers the `core/footnotes` block on the server. |
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*/ |
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function gutenberg_register_block_core_footnotes() { |
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foreach ( array( 'post', 'page' ) as $post_type ) { |
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register_post_meta( |
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$post_type, |
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'footnotes', |
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array( |
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'show_in_rest' => true, |
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'single' => true, |
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'type' => 'string', |
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) |
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); |
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} |
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register_block_type_from_metadata( |
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__DIR__ . '/footnotes', |
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array( |
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'render_callback' => 'gutenberg_render_block_core_footnotes', |
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) |
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); |
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} |
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add_action( 'init', 'gutenberg_register_block_core_footnotes', 20 ); |
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|
