init

wp-content/plugins/jetpack/modules/shortlinks.php

@@ -0,0 +1,188 @@
+<?php
+/**
+ * Module Name: WP.me Shortlinks
+ * Module Description: Generates shorter links using the wp.me domain.
+ * Sort Order: 8
+ * First Introduced: 1.1
+ * Requires Connection: Yes
+ * Auto Activate: No
+ * Module Tags: Social
+ * Feature: Writing
+ * Additional Search Queries: shortlinks, wp.me
+ *
+ * @package automattic/jetpack
+ */
+
+add_filter( 'pre_get_shortlink', 'wpme_get_shortlink_handler', 1, 4 );
+
+if ( ! function_exists( 'wpme_dec2sixtwo' ) ) {
+	/**
+	 * Converts number to base 62.
+	 *
+	 * @param int $num Number.
+	 *
+	 * @return string Value in base 62.
+	 */
+	function wpme_dec2sixtwo( $num ) {
+		$index = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+		$out   = '';
+
+		if ( $num < 0 ) {
+			$out = '-';
+			$num = abs( $num );
+		}
+
+		for ( $t = floor( log10( $num ) / log10( 62 ) ); $t >= 0; $t-- ) {
+			$a   = floor( $num / pow( 62, $t ) );
+			$out = $out . substr( $index, $a, 1 );
+			$num = $num - ( $a * pow( 62, $t ) );
+		}
+
+		return $out;
+	}
+}
+
+/**
+ * Returns the WP.me shortlink.
+ *
+ * @param int    $id Post ID, or 0 for the current post.
+ * @param string $context The context for the link. One of 'post' or 'query'.
+ * @param bool   $allow_slugs Whether to allow post slugs in the shortlink.
+ *
+ * @return string
+ */
+function wpme_get_shortlink( $id = 0, $context = 'post', $allow_slugs = true ) {
+	global $wp_query;
+
+	$blog_id = Jetpack_Options::get_option( 'id' );
+
+	if ( 'query' === $context ) {
+		if ( is_singular() ) {
+			$id      = $wp_query->get_queried_object_id();
+			$context = 'post';
+		} elseif ( is_front_page() ) {
+			$context = 'blog';
+		} else {
+			return '';
+		}
+	}
+
+	if ( 'blog' === $context ) {
+		if ( empty( $id ) ) {
+			$id = $blog_id;
+		}
+
+		return 'https://wp.me/' . wpme_dec2sixtwo( $id );
+	}
+
+	$post = get_post( $id );
+
+	if ( empty( $post ) ) {
+			return '';
+	}
+
+	$post_id = $post->ID;
+	$type    = '';
+
+	if ( $allow_slugs && 'publish' === $post->post_status && 'post' === $post->post_type && strlen( $post->post_name ) <= 8 && ! str_contains( $post->post_name, '%' )
+		&& ! str_contains( $post->post_name, '-' ) ) {
+		$id   = $post->post_name;
+		$type = 's';
+	} else {
+		$id = wpme_dec2sixtwo( $post_id );
+		if ( 'page' === $post->post_type ) {
+			$type = 'P';
+		} elseif ( 'post' === $post->post_type || post_type_supports( $post->post_type, 'shortlinks' ) ) {
+			$type = 'p';
+		} elseif ( 'attachment' === $post->post_type ) {
+			$type = 'a';
+		}
+	}
+
+	if ( empty( $type ) ) {
+		return '';
+	}
+
+	return 'https://wp.me/' . $type . wpme_dec2sixtwo( $blog_id ) . '-' . $id;
+}
+
+/**
+ * Get the shortlink handler.
+ *
+ * Used with the Core pre_get_shortlink hook.
+ *
+ * @param string $shortlink Shortlink value from the action. Ignored.
+ * @param int    $id Post ID (0 for the current post).
+ * @param string $context The context for the link. One of 'post' or 'query'.
+ * @param bool   $allow_slugs Whether to allow post slugs in the shortlink.
+ *
+ * @return string
+ */
+function wpme_get_shortlink_handler( $shortlink, $id, $context, $allow_slugs ) {
+	return wpme_get_shortlink( $id, $context, $allow_slugs );
+}
+
+/**
+ * Add Shortlinks to the REST API responses.
+ *
+ * @since 6.9.0
+ *
+ * @action rest_api_init
+ * @uses register_rest_field, wpme_rest_get_shortlink
+ */
+function wpme_rest_register_shortlinks() {
+	// Post types that support shortlinks by default.
+	$supported_post_types = array(
+		'attachment',
+		'page',
+		'post',
+	);
+
+	// Add any CPT that may have declared support for shortlinks.
+	foreach ( get_post_types() as $post_type ) {
+		if (
+			post_type_supports( $post_type, 'shortlinks' )
+			&& post_type_supports( $post_type, 'editor' )
+		) {
+			$supported_post_types[] = $post_type;
+		}
+	}
+
+	register_rest_field(
+		$supported_post_types,
+		'jetpack_shortlink',
+		array(
+			'get_callback'    => 'wpme_rest_get_shortlink',
+			'update_callback' => null,
+			'schema'          => null,
+		)
+	);
+}
+
+/**
+ * Get the shortlink of a post.
+ *
+ * @since 6.9.0
+ *
+ * @param array $object Details of current post.
+ *
+ * @uses wpme_get_shortlink
+ *
+ * @return string
+ */
+function wpme_rest_get_shortlink( $object ) {
+	$object_id = $object['id'] ?? 0;
+	return wpme_get_shortlink( $object_id, array() );
+}
+
+// Add shortlinks to the REST API Post response.
+add_action( 'rest_api_init', 'wpme_rest_register_shortlinks' );
+
+/**
+ * Set the Shortlink Gutenberg extension as available.
+ */
+function wpme_set_extension_available() {
+	Jetpack_Gutenberg::set_extension_available( 'shortlinks' );
+}
+
+add_action( 'init', 'wpme_set_extension_available' );