342 lines
9.6 KiB
PHP
342 lines
9.6 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 Post ID or post object. Optional, default is the current post from the loop.
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* @return mixed The format if successful. False otherwise.
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*/
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function get_post_format( $post = null ) {
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if ( ! $post = get_post( $post ) )
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return false;
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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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*
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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|int $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( $format, get_post_format_slugs() ) )
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$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, $format, 'post_format' );
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}
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/**
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* Returns an array of post format slugs to their translated and pretty display versions
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*
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* @since 3.1.0
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*
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* @return array The array of translated post format names.
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*/
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function get_post_format_strings() {
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$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 $strings;
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}
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/**
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* Retrieves an array of post format slugs.
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*
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* @since 3.1.0
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*
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* @uses get_post_format_strings()
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*
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* @return array The array of post format slugs.
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*/
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function get_post_format_slugs() {
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$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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* @uses get_post_format_strings()
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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 The post format slug.
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* @return string The post format term 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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* Extract a URL from passed content, if possible
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* Checks for a URL on the first line of the content or the first encountered href attribute.
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*
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* @since 3.6.0
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*
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* @param string $content A string which might contain a URL.
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* @return string The found URL.
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*/
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function get_content_url( $content ) {
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if ( empty( $content ) )
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return '';
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// the content is a URL
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$trimmed = trim( $content );
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if ( 0 === stripos( $trimmed, 'http' ) && ! preg_match( '#\s#', $trimmed ) ) {
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return $trimmed;
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// the content is HTML so we grab the first href
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} elseif ( preg_match( '/<a\s[^>]*?href=([\'"])(.+?)\1/is', $content, $matches ) ) {
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return esc_url_raw( $matches[2] );
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}
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$lines = explode( "\n", $trimmed );
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$line = trim( array_shift( $lines ) );
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// the content is a URL followed by content
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if ( 0 === stripos( $line, 'http' ) )
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return esc_url_raw( $line );
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return '';
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}
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/**
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* Don't display post titles for asides and status posts on the front end.
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*
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* @since 3.6.0
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* @access private
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*/
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function _post_formats_title( $title, $post_id = 0 ) {
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if ( ! $post_id || is_admin() || is_feed() || ! in_array( get_post_format( $post_id ), array( 'aside', 'status' ) ) )
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return $title;
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// Return an empty string only if the title is auto-generated.
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$post = get_post( $post_id );
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if ( $title == _post_formats_generate_title( $post->post_content, get_post_format( $post_id ) ) )
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$title = '';
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return $title;
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}
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/**
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* Generate a title from the post content or format.
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*
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* @since 3.6.0
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* @access private
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*/
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function _post_formats_generate_title( $content, $post_format = '' ) {
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$title = wp_trim_words( strip_shortcodes( $content ), 8, '' );
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if ( empty( $title ) )
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$title = get_post_format_string( $post_format );
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return $title;
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}
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/**
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* Fixes empty titles for aside and status formats.
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*
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* Passes a generated post title to the 'wp_insert_post_data' filter.
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*
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* @since 3.6.0
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* @access private
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*
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* @uses _post_formats_generate_title()
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*/
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function _post_formats_fix_empty_title( $data, $postarr ) {
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if ( 'auto-draft' == $data['post_status'] || ! post_type_supports( $data['post_type'], 'post-formats' ) )
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return $data;
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$post_id = ( isset( $postarr['ID'] ) ) ? absint( $postarr['ID'] ) : 0;
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$post_format = '';
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if ( $post_id )
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$post_format = get_post_format( $post_id );
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if ( isset( $postarr['post_format'] ) )
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$post_format = ( in_array( $postarr['post_format'], get_post_format_slugs() ) ) ? $postarr['post_format'] : '';
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if ( ! in_array( $post_format, array( 'aside', 'status' ) ) )
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return $data;
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if ( $data['post_title'] == _post_formats_generate_title( $data['post_content'], $post_format ) )
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return $data;
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// If updating an existing post, check whether the title was auto-generated.
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if ( $post_id && $post = get_post( $post_id ) )
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if ( $post->post_title == $data['post_title'] && $post->post_title == _post_formats_generate_title( $post->post_content, get_post_format( $post->ID ) ) )
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$data['post_title'] = '';
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if ( empty( $data['post_title'] ) )
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$data['post_title'] = _post_formats_generate_title( $data['post_content'], $post_format );
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return $data;
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}
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