430 lines
12 KiB
PHP
430 lines
12 KiB
PHP
<?php
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/**
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* Post format functions.
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*
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* @package WordPress
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* @subpackage Post
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*/
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/**
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* Retrieve the format slug for a post
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*
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* @since 3.1.0
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*
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* @param int|object $post A post
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*
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* @return mixed The format if successful. False if no format is set. WP_Error if errors.
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*/
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function get_post_format( $post = null ) {
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$post = get_post($post);
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if ( ! post_type_supports( $post->post_type, 'post-formats' ) )
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return false;
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$_format = get_the_terms( $post->ID, 'post_format' );
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if ( empty( $_format ) )
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return false;
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$format = array_shift( $_format );
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return ( str_replace('post-format-', '', $format->slug ) );
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}
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/**
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* Check if a post has a particular format
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*
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* @since 3.1.0
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* @uses has_term()
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*
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* @param string $format The format to check for
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* @param object|id $post The post to check. If not supplied, defaults to the current post if used in the loop.
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* @return bool True if the post has the format, false otherwise.
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*/
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function has_post_format( $format, $post = null ) {
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return has_term('post-format-' . sanitize_key($format), 'post_format', $post);
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}
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/**
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* Assign a format to a post
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*
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* @since 3.1.0
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*
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* @param int|object $post The post for which to assign a format
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* @param string $format A format to assign. Use an empty string or array to remove all formats from the post.
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* @return mixed WP_Error on error. Array of affected term IDs on success.
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*/
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function set_post_format( $post, $format ) {
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$post = get_post($post);
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if ( empty($post) )
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return new WP_Error('invalid_post', __('Invalid post'));
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if ( !empty($format) ) {
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$format = sanitize_key($format);
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if ( 'standard' == $format || !in_array( $format, array_keys( get_post_format_slugs() ) ) )
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$format = '';
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else
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$format = 'post-format-' . $format;
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}
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return wp_set_post_terms($post->ID, $format, 'post_format');
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}
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/**
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* Retrieve post format metadata for a post
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*
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* @since 3.6.0
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*
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* @param int $post_id
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* @return null
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*/
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function get_post_format_meta( $post_id = 0 ) {
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$values = array(
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'quote' => '',
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'quote_source' => '',
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'image' => '',
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'url' => '',
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'gallery' => '',
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'media' => '',
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);
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foreach ( $values as $key => $value )
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$values[$key] = get_post_meta( $post_id, '_wp_format_' . $key, true );
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return $values;
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}
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/**
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* Returns an array of post format slugs to their translated and pretty display versions
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*
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* @since 3.1.0
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*
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* @return array The array of translations
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*/
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function get_post_format_strings() {
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$strings = array(
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'standard' => _x( 'Standard', 'Post format' ), // Special case. any value that evals to false will be considered standard
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'aside' => _x( 'Aside', 'Post format' ),
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'chat' => _x( 'Chat', 'Post format' ),
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'gallery' => _x( 'Gallery', 'Post format' ),
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'link' => _x( 'Link', 'Post format' ),
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'image' => _x( 'Image', 'Post format' ),
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'quote' => _x( 'Quote', 'Post format' ),
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'status' => _x( 'Status', 'Post format' ),
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'video' => _x( 'Video', 'Post format' ),
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'audio' => _x( 'Audio', 'Post format' ),
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);
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return $strings;
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}
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/**
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* Retrieves an array of post format slugs.
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*
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* @since 3.1.0
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*
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* @return array The array of post format slugs.
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*/
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function get_post_format_slugs() {
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$slugs = array_keys( get_post_format_strings() );
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return array_combine( $slugs, $slugs );
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}
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/**
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* Returns a pretty, translated version of a post format slug
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*
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* @since 3.1.0
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*
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* @param string $slug A post format slug
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* @return string The translated post format name
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*/
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function get_post_format_string( $slug ) {
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$strings = get_post_format_strings();
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if ( !$slug )
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return $strings['standard'];
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else
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return ( isset( $strings[$slug] ) ) ? $strings[$slug] : '';
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}
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/**
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* Returns a link to a post format index.
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*
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* @since 3.1.0
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*
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* @param string $format Post format
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* @return string Link
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*/
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function get_post_format_link( $format ) {
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$term = get_term_by('slug', 'post-format-' . $format, 'post_format' );
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if ( ! $term || is_wp_error( $term ) )
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return false;
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return get_term_link( $term );
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}
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/**
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* Filters the request to allow for the format prefix.
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*
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* @access private
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* @since 3.1.0
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*/
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function _post_format_request( $qvs ) {
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if ( ! isset( $qvs['post_format'] ) )
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return $qvs;
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$slugs = get_post_format_slugs();
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if ( isset( $slugs[ $qvs['post_format'] ] ) )
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$qvs['post_format'] = 'post-format-' . $slugs[ $qvs['post_format'] ];
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$tax = get_taxonomy( 'post_format' );
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if ( ! is_admin() )
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$qvs['post_type'] = $tax->object_type;
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return $qvs;
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}
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add_filter( 'request', '_post_format_request' );
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/**
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* Filters the post format term link to remove the format prefix.
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*
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* @access private
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* @since 3.1.0
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*/
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function _post_format_link( $link, $term, $taxonomy ) {
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global $wp_rewrite;
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if ( 'post_format' != $taxonomy )
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return $link;
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if ( $wp_rewrite->get_extra_permastruct( $taxonomy ) ) {
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return str_replace( "/{$term->slug}", '/' . str_replace( 'post-format-', '', $term->slug ), $link );
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} else {
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$link = remove_query_arg( 'post_format', $link );
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return add_query_arg( 'post_format', str_replace( 'post-format-', '', $term->slug ), $link );
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}
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}
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add_filter( 'term_link', '_post_format_link', 10, 3 );
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/**
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* Remove the post format prefix from the name property of the term object created by get_term().
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*
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* @access private
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* @since 3.1.0
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*/
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function _post_format_get_term( $term ) {
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if ( isset( $term->slug ) ) {
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$term->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
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}
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return $term;
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}
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add_filter( 'get_post_format', '_post_format_get_term' );
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/**
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* Remove the post format prefix from the name property of the term objects created by get_terms().
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*
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* @access private
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* @since 3.1.0
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*/
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function _post_format_get_terms( $terms, $taxonomies, $args ) {
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if ( in_array( 'post_format', (array) $taxonomies ) ) {
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if ( isset( $args['fields'] ) && 'names' == $args['fields'] ) {
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foreach( $terms as $order => $name ) {
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$terms[$order] = get_post_format_string( str_replace( 'post-format-', '', $name ) );
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}
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} else {
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foreach ( (array) $terms as $order => $term ) {
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if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
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$terms[$order]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
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}
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}
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}
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}
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return $terms;
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}
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add_filter( 'get_terms', '_post_format_get_terms', 10, 3 );
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/**
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* Remove the post format prefix from the name property of the term objects created by wp_get_object_terms().
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*
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* @access private
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* @since 3.1.0
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*/
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function _post_format_wp_get_object_terms( $terms ) {
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foreach ( (array) $terms as $order => $term ) {
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if ( isset( $term->taxonomy ) && 'post_format' == $term->taxonomy ) {
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$terms[$order]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
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}
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}
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return $terms;
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}
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add_filter( 'wp_get_object_terms', '_post_format_wp_get_object_terms' );
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/**
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* Return the class for a post format content wrapper
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*
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* @since 3.6.0
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*
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* @param string $format
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*/
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function get_post_format_content_class( $format ) {
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return apply_filters( 'post_format_content_class', 'post-format-content', $format );
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}
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/**
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* Ouput the class for a post format content wrapper
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*
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* @since 3.6.0
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*
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* @param string $format
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*/
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function post_format_content_class( $format ) {
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echo get_post_format_content_class( $format );
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}
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/**
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* Provide fallback behavior for Posts that have associated post format
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*
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* @since 3.6.0
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*
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* @param string $content
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*/
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function post_formats_compat( $content, $id = 0 ) {
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$post = empty( $id ) ? get_post() : get_post( $id );
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if ( empty( $post ) )
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return $content;
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$format = get_post_format( $post );
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if ( empty( $format ) || in_array( $format, array( 'status', 'aside', 'chat' ) ) )
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return $content;
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if ( current_theme_supports( 'post-formats', $format ) )
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return $content;
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$defaults = array(
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'position' => 'after',
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'tag' => 'div',
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'class' => get_post_format_content_class( $format ),
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'link_class' => '',
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'image_class' => '',
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'gallery' => '[gallery]',
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'audio' => '',
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'video' => ''
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);
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$args = apply_filters( 'post_format_compat', array() );
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$compat = wp_parse_args( $args, $defaults );
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$show_content = true;
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$format_output = '';
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$meta = get_post_format_meta( $post->ID );
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switch ( $format ) {
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case 'link':
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$compat['tag'] = '';
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if ( ! empty( $meta['url'] ) ) {
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$esc_url = preg_quote( $meta['url'], '#' );
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// Make sure the same URL isn't in the post (modified/extended versions allowed)
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if ( ! preg_match( '#' . $esc_url . '[^/&\?]#', $content ) ) {
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$format_output .= sprintf(
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'<a %shref="%s">%s</a>',
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empty( $compat['link_class'] ) ? '' : sprintf( 'class="%s" ', esc_attr( $compat['link_class'] ) ),
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esc_url( $meta['url'] ),
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empty( $post->post_title ) ? esc_url( $meta['url'] ) : apply_filters( 'the_title', $post->post_title )
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);
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}
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}
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break;
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case 'quote':
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if ( ! empty( $meta['quote'] ) && ! stristr( $content, $meta['quote'] ) ) {
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$format_output .= sprintf( '<blockquote>%s</blockquote>', $meta['quote'] );
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if ( ! empty( $meta['quote_source'] ) ) {
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$format_output .= sprintf(
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'<cite>%s</cite>',
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! empty( $meta['url'] ) ?
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sprintf( '<a href="%s">%s</a>', esc_url( $meta['url'] ), $meta['quote_source'] ) :
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$meta['quote_source']
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);
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}
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}
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break;
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case 'image':
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if ( ! empty( $meta['image'] ) ) {
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$image = is_numeric( $meta['image'] ) ? wp_get_attachment_url( $meta['image'] ) : $meta['image'];
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if ( ! empty( $image ) && ! stristr( $content, $image ) ) {
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$image_html = sprintf(
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'<img %ssrc="%s" alt="" />',
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empty( $compat['image_class'] ) ? '' : sprintf( 'class="%s" ', esc_attr( $compat['image_class'] ) ),
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$image
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);
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if ( empty( $meta['url'] ) ) {
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$format_output .= $image_html;
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} else {
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$format_output .= sprintf(
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'<a href="%s">%s</a>',
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esc_url( $meta['url'] ),
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$image_html
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);
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}
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}
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}
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break;
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case 'gallery':
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preg_match_all( '/' . get_shortcode_regex() . '/s', $content, $matches );
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if ( ! empty( $matches ) && isset( $matches[2] ) ) {
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foreach ( (array) $matches[2] as $match ) {
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if ( 'gallery' === $match )
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break 2; // foreach + case
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}
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}
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if ( empty( $meta['gallery'] ) && ! empty( $compat['gallery'] ) ) {
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$format_output .= $compat['gallery'];
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} elseif ( ! empty( $meta['gallery'] ) ) {
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$format_output .= $meta['gallery'];
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}
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break;
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case 'video':
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case 'audio':
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$shortcode_regex = '/' . get_shortcode_regex() . '/s';
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$matches = preg_match( $shortcode_regex, $content );
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if ( ! $matches || $format !== $matches[2] ) {
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if ( empty( $meta['media'] ) && ! empty( $compat[$format] ) ) {
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$format_output .= $compat[$format];
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} elseif ( ! empty( $meta['media'] ) ) {
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// the metadata is a shortcode or an embed code
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if ( preg_match( $shortcode_regex, $meta['media'] ) || preg_match( '#<[^>]+>#', $meta['media'] ) ) {
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$format_output .= $meta['media'];
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} elseif ( ! stristr( $content, $meta['media'] ) ) {
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// attempt to embed the URL
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$format_output .= sprintf( '[embed]%s[/embed]', $meta['media'] );
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}
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}
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}
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break;
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default:
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return $content;
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break;
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}
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if ( empty( $format_output ) )
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return $content;
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$output = '';
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if ( ! empty( $content ) && $show_content && 'before' !== $compat['position'] )
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$output .= $content . PHP_EOL . PHP_EOL;
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if ( ! empty( $compat['tag'] ) )
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$output .= sprintf( '<%s class="%s">', tag_escape( $compat['tag'] ), esc_attr( $compat['class'] ) );
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$output .= $format_output;
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if ( ! empty( $compat['tag'] ) )
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$output .= sprintf( '</%s>', tag_escape( $compat['tag'] ) );
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if ( ! empty( $content ) && $show_content && 'before' === $compat['position'] )
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$output .= PHP_EOL . PHP_EOL . $content;
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return $output;
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}
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