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<?php
/**
* Post format functions.
*
* @package WordPress
* @subpackage Post
*/
/**
* Retrieve the format slug for a post
*
* @since 3.1.0
*
* @param int|WP_Post|null $post Optional. Post ID or post object. Defaults to the current post in the loop.
* @return string|false The format if successful. False otherwise.
*/
function get_post_format( $post = null ) {
$post = get_post( $post );
if ( ! $post ) {
return false;
}
if ( ! post_type_supports( $post->post_type, 'post-formats' ) ) {
return false;
}
$_format = get_the_terms( $post->ID, 'post_format' );
if ( empty( $_format ) ) {
return false;
}
$format = reset( $_format );
return str_replace( 'post-format-', '', $format->slug );
}
/**
* Check if a post has any of the given formats, or any format.
*
* @since 3.1.0
*
* @param string|string[] $format Optional. The format or formats to check. Default empty array.
* @param WP_Post|int|null $post Optional. The post to check. Defaults to the current post in the loop.
* @return bool True if the post has any of the given formats (or any format, if no format specified),
* false otherwise.
*/
function has_post_format( $format = array(), $post = null ) {
$prefixed = array();
if ( $format ) {
foreach ( (array) $format as $single ) {
$prefixed[] = 'post-format-' . sanitize_key( $single );
}
}
return has_term( $prefixed, 'post_format', $post );
}
/**
* Assign a format to a post
*
* @since 3.1.0
*
* @param int|WP_Post $post The post for which to assign a format.
* @param string $format A format to assign. Use an empty string or array to remove all formats from the post.
* @return array|WP_Error|false Array of affected term IDs on success. WP_Error on error.
*/
function set_post_format( $post, $format ) {
$post = get_post( $post );
if ( ! $post ) {
return new WP_Error( 'invalid_post', __( 'Invalid post.' ) );
}
if ( ! empty( $format ) ) {
$format = sanitize_key( $format );
if ( 'standard' === $format || ! in_array( $format, get_post_format_slugs(), true ) ) {
$format = '';
} else {
$format = 'post-format-' . $format;
}
}
return wp_set_post_terms( $post->ID, $format, 'post_format' );
}
/**
* Returns an array of post format slugs to their translated and pretty display versions
*
* @since 3.1.0
*
* @return string[] Array of post format labels keyed by format slug.
*/
function get_post_format_strings() {
$strings = array(
'standard' => _x( 'Standard', 'Post format' ), // Special case. Any value that evals to false will be considered standard.
'aside' => _x( 'Aside', 'Post format' ),
'chat' => _x( 'Chat', 'Post format' ),
'gallery' => _x( 'Gallery', 'Post format' ),
'link' => _x( 'Link', 'Post format' ),
'image' => _x( 'Image', 'Post format' ),
'quote' => _x( 'Quote', 'Post format' ),
'status' => _x( 'Status', 'Post format' ),
'video' => _x( 'Video', 'Post format' ),
'audio' => _x( 'Audio', 'Post format' ),
);
return $strings;
}
/**
* Retrieves the array of post format slugs.
*
* @since 3.1.0
*
* @return string[] The array of post format slugs as both keys and values.
*/
function get_post_format_slugs() {
$slugs = array_keys( get_post_format_strings() );
return array_combine( $slugs, $slugs );
}
/**
* Returns a pretty, translated version of a post format slug
*
* @since 3.1.0
*
* @param string $slug A post format slug.
* @return string The translated post format name.
*/
function get_post_format_string( $slug ) {
$strings = get_post_format_strings();
if ( ! $slug ) {
return $strings['standard'];
} else {
return ( isset( $strings[ $slug ] ) ) ? $strings[ $slug ] : '';
}
}
/**
* Returns a link to a post format index.
*
* @since 3.1.0
*
* @param string $format The post format slug.
* @return string|WP_Error|false The post format term link.
*/
function get_post_format_link( $format ) {
$term = get_term_by( 'slug', 'post-format-' . $format, 'post_format' );
if ( ! $term || is_wp_error( $term ) ) {
return false;
}
return get_term_link( $term );
}
/**
* Filters the request to allow for the format prefix.
*
* @access private
* @since 3.1.0
*
* @param array $qvs
* @return array
*/
function _post_format_request( $qvs ) {
if ( ! isset( $qvs['post_format'] ) ) {
return $qvs;
}
$slugs = get_post_format_slugs();
if ( isset( $slugs[ $qvs['post_format'] ] ) ) {
$qvs['post_format'] = 'post-format-' . $slugs[ $qvs['post_format'] ];
}
$tax = get_taxonomy( 'post_format' );
if ( ! is_admin() ) {
$qvs['post_type'] = $tax->object_type;
}
return $qvs;
}
/**
* Filters the post format term link to remove the format prefix.
*
* @access private
* @since 3.1.0
*
* @global WP_Rewrite $wp_rewrite WordPress rewrite component.
*
* @param string $link
* @param WP_Term $term
* @param string $taxonomy
* @return string
*/
function _post_format_link( $link, $term, $taxonomy ) {
global $wp_rewrite;
if ( 'post_format' !== $taxonomy ) {
return $link;
}
if ( $wp_rewrite->get_extra_permastruct( $taxonomy ) ) {
return str_replace( "/{$term->slug}", '/' . str_replace( 'post-format-', '', $term->slug ), $link );
} else {
$link = remove_query_arg( 'post_format', $link );
return add_query_arg( 'post_format', str_replace( 'post-format-', '', $term->slug ), $link );
}
}
/**
* Remove the post format prefix from the name property of the term object created by get_term().
*
* @access private
* @since 3.1.0
*
* @param object $term
* @return object
*/
function _post_format_get_term( $term ) {
if ( isset( $term->slug ) ) {
$term->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
}
return $term;
}
/**
* Remove the post format prefix from the name property of the term objects created by get_terms().
*
* @access private
* @since 3.1.0
*
* @param array $terms
* @param string|array $taxonomies
* @param array $args
* @return array
*/
function _post_format_get_terms( $terms, $taxonomies, $args ) {
if ( in_array( 'post_format', (array) $taxonomies, true ) ) {
if ( isset( $args['fields'] ) && 'names' === $args['fields'] ) {
foreach ( $terms as $order => $name ) {
$terms[ $order ] = get_post_format_string( str_replace( 'post-format-', '', $name ) );
}
} else {
foreach ( (array) $terms as $order => $term ) {
if ( isset( $term->taxonomy ) && 'post_format' === $term->taxonomy ) {
$terms[ $order ]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
}
}
}
}
return $terms;
}
/**
* Remove the post format prefix from the name property of the term objects created by wp_get_object_terms().
*
* @access private
* @since 3.1.0
*
* @param array $terms
* @return array
*/
function _post_format_wp_get_object_terms( $terms ) {
foreach ( (array) $terms as $order => $term ) {
if ( isset( $term->taxonomy ) && 'post_format' === $term->taxonomy ) {
$terms[ $order ]->name = get_post_format_string( str_replace( 'post-format-', '', $term->slug ) );
}
}
return $terms;
}