186 lines
6.3 KiB
PHP
186 lines
6.3 KiB
PHP
<?php
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/**
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* Server-side rendering of the `core/post-time-to-read` block.
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*
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* @package WordPress
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*/
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/**
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* Counts words or characters in a provided text string.
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*
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* This function currently employs an array of regular expressions
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* to parse HTML and count words, which may result in inaccurate
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* word counts. However, it is designed primarily to agree with the
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* corresponding JavaScript function.
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*
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* Any improvements in the word counting, for example with the HTML API
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* and {@see \IntlBreakIterator::createWordInstance()} should coordinate
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* with changes to the JavaScript implementation to ensure consistency
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* between the editor and the rendered page.
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*
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* @since 6.9.0
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*
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* @param string $text Text to count elements in.
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* @param string $type The type of count. Accepts 'words', 'characters_excluding_spaces', or 'characters_including_spaces'.
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*
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* @return string The rendered word count.
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*/
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function block_core_post_time_to_read_word_count( $text, $type ) {
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$settings = array(
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'html_regexp' => '/<\/?[a-z][^>]*?>/i',
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'html_comment_regexp' => '/<!--[\s\S]*?-->/',
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'space_regexp' => '/ | /i',
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'html_entity_regexp' => '/&\S+?;/',
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'connector_regexp' => "/--|\x{2014}/u",
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'remove_regexp' => "/[\x{0021}-\x{0040}\x{005B}-\x{0060}\x{007B}-\x{007E}\x{0080}-\x{00BF}\x{00D7}\x{00F7}\x{2000}-\x{2BFF}\x{2E00}-\x{2E7F}]/u",
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'astral_regexp' => "/[\x{010000}-\x{10FFFF}]/u",
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'words_regexp' => '/\S\s+/u',
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'characters_excluding_spaces_regexp' => '/\S/u',
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'characters_including_spaces_regexp' => "/[^\f\n\r\t\v\x{00AD}\x{2028}\x{2029}]/u",
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);
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$count = 0;
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if ( '' === trim( $text ) ) {
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return $count;
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}
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// Sanitize type to one of three possibilities: 'words', 'characters_excluding_spaces' or 'characters_including_spaces'.
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if ( 'characters_excluding_spaces' !== $type && 'characters_including_spaces' !== $type ) {
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$type = 'words';
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}
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$text .= "\n";
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// Replace all HTML with a new-line.
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$text = preg_replace( $settings['html_regexp'], "\n", $text );
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// Remove all HTML comments.
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$text = preg_replace( $settings['html_comment_regexp'], '', $text );
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// If a shortcode regular expression has been provided use it to remove shortcodes.
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if ( ! empty( $settings['shortcodes_regexp'] ) ) {
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$text = preg_replace( $settings['shortcodes_regexp'], "\n", $text );
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}
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// Normalize non-breaking space to a normal space.
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$text = preg_replace( $settings['space_regexp'], ' ', $text );
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if ( 'words' === $type ) {
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// Remove HTML Entities.
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$text = preg_replace( $settings['html_entity_regexp'], '', $text );
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// Convert connectors to spaces to count attached text as words.
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$text = preg_replace( $settings['connector_regexp'], ' ', $text );
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// Remove unwanted characters.
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$text = preg_replace( $settings['remove_regexp'], '', $text );
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} else {
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// Convert HTML Entities to "a".
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$text = preg_replace( $settings['html_entity_regexp'], 'a', $text );
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// Remove surrogate points.
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$text = preg_replace( $settings['astral_regexp'], 'a', $text );
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}
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// Match with the selected type regular expression to count the items.
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return (int) preg_match_all( $settings[ $type . '_regexp' ], $text );
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}
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/**
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* Renders the `core/post-time-to-read` block on the server.
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*
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* @since 6.9.0
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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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* @return string Returns the rendered post author name block.
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*/
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function render_block_core_post_time_to_read( $attributes, $content, $block ) {
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if ( ! isset( $block->context['postId'] ) ) {
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return '';
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}
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$content = get_the_content();
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$average_reading_rate = isset( $attributes['averageReadingSpeed'] ) ? $attributes['averageReadingSpeed'] : 189;
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$display_mode = isset( $attributes['displayMode'] ) ? $attributes['displayMode'] : 'time';
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$word_count_type = wp_get_word_count_type();
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$total_words = block_core_post_time_to_read_word_count( $content, $word_count_type );
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$parts = array();
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// Add "time to read" part, if enabled.
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if ( 'time' === $display_mode ) {
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if ( ! empty( $attributes['displayAsRange'] ) ) {
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// Calculate faster reading rate with 20% speed = lower minutes,
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// and slower reading rate with 20% speed = higher minutes.
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$min_minutes = max( 1, (int) round( $total_words / $average_reading_rate * 0.8 ) );
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$max_minutes = max( 1, (int) round( $total_words / $average_reading_rate * 1.2 ) );
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if ( $min_minutes === $max_minutes ) {
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$max_minutes = $min_minutes + 1;
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}
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/* translators: 1: minimum minutes, 2: maximum minutes to read the post. */
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$time_string = sprintf(
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/* translators: 1: minimum minutes, 2: maximum minutes to read the post. */
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_x( '%1$s–%2$s minutes', 'Range of minutes to read' ),
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$min_minutes,
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$max_minutes
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);
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} else {
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$minutes_to_read = max( 1, (int) round( $total_words / $average_reading_rate ) );
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$time_string = sprintf(
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/* translators: %s: the number of minutes to read the post. */
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_n( '%s minute', '%s minutes', $minutes_to_read ),
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$minutes_to_read
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);
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}
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$parts[] = $time_string;
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}
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// Add "word count" part, if enabled.
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if ( 'words' === $display_mode ) {
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$word_count_string = 'words' === $word_count_type ? sprintf(
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/* translators: %s: the number of words in the post. */
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_n( '%s word', '%s words', $total_words ),
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number_format_i18n( $total_words )
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) : sprintf(
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/* translators: %s: the number of characters in the post. */
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_n( '%s character', '%s characters', $total_words ),
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number_format_i18n( $total_words )
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);
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$parts[] = $word_count_string;
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}
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$display_string = implode( '<br>', $parts );
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$align_class_name = empty( $attributes['textAlign'] ) ? '' : "has-text-align-{$attributes['textAlign']}";
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$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $align_class_name ) );
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return sprintf(
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'<div %1$s>%2$s</div>',
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$wrapper_attributes,
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$display_string
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);
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}
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/**
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* Registers the `core/post-time-to-read` block on the server.
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*
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* @since 6.9.0
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*/
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function register_block_core_post_time_to_read() {
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register_block_type_from_metadata(
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__DIR__ . '/post-time-to-read',
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array(
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'render_callback' => 'render_block_core_post_time_to_read',
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)
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);
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}
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add_action( 'init', 'register_block_core_post_time_to_read' );
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