post_parent ) {
/**
* Grab the IDs of all the image attachments in a gallery so we can get the
* URL of the next adjacent image in a gallery, or the first image (if
* we're looking at the last image in a gallery), or, in a gallery of one,
* just the link to that image file.
*/
$attachment_ids = get_posts( array(
'post_parent' => $post->post_parent,
'fields' => 'ids',
'numberposts' => 999,
'post_status' => 'inherit',
'post_type' => 'attachment',
'post_mime_type' => 'image',
'order' => 'ASC',
'orderby' => 'menu_order ID'
) );
// If there is more than 1 attachment in a gallery...
if ( is_countable( $attachment_ids ) && count( $attachment_ids ) > 1 ) {
foreach ( $attachment_ids as $idx => $attachment_id ) {
if ( $attachment_id == $post->ID ) {
$next_id = $attachment_ids[ ( $idx + 1 ) % count( $attachment_ids ) ];
break;
}
}
// get the URL of the next image attachment...
if ( $next_id )
$next_attachment_url = get_attachment_link( $next_id );
// or get the URL of the first image attachment.
else
$next_attachment_url = get_attachment_link( array_shift( $attachment_ids ) );
}
}
printf( '%3$s',
esc_url( $next_attachment_url ),
the_title_attribute( array( 'echo' => false ) ),
wp_get_attachment_image( $post->ID, $attachment_size )
);
}
endif;
if ( ! function_exists( 'panel_posted_on' ) ) :
/**
* Prints HTML with meta information for the current post-date/time and author.
*/
function panel_posted_on() {
if ( is_sticky() && ! is_single() ) {
printf( __( 'Featured', 'panel' ),
esc_url( get_permalink() ),
esc_attr( get_the_time() )
);
} else {
printf( __( '', 'panel' ),
esc_url( get_permalink() ),
esc_attr( get_the_time() ),
esc_attr( get_the_date( 'c' ) ),
esc_html( get_the_date() )
);
}
}
endif;
if ( ! function_exists( 'panel_posted_by' ) ) :
/**
* Prints HTML with meta information for the current post-date/time and author.
*/
function panel_posted_by() {
printf( __( ' ~ %3$s', 'panel' ),
esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
esc_attr( sprintf( __( 'View all posts by %s', 'panel' ), get_the_author() ) ),
get_the_author()
);
}
endif;
/**
* Returns true if a blog has more than 1 category
*/
function panel_categorized_blog() {
if ( false === ( $all_the_cool_cats = get_transient( 'all_the_cool_cats' ) ) ) {
// Create an array of all the categories that are attached to posts
$all_the_cool_cats = get_categories( array(
'hide_empty' => 1,
) );
// Count the number of categories that are attached to the posts
$all_the_cool_cats = is_countable( $all_the_cool_cats ) ? count( $all_the_cool_cats ) : 0;
set_transient( 'all_the_cool_cats', $all_the_cool_cats );
}
if ( '1' != $all_the_cool_cats ) {
// This blog has more than 1 category so panel_categorized_blog should return true
return true;
} else {
// This blog has only 1 category so panel_categorized_blog should return false
return false;
}
}
/**
* Flush out the transients used in panel_categorized_blog
*/
function panel_category_transient_flusher() {
// Like, beat it. Dig?
delete_transient( 'all_the_cool_cats' );
}
add_action( 'edit_category', 'panel_category_transient_flusher' );
add_action( 'save_post', 'panel_category_transient_flusher' );
/**
* Link to the first post in a series.
*
* @param string $format
* @param array $args
*/
function panel_get_first_post_link( $args = array() ) {
$args['order'] = 'ASC';
return panel_get_bookend_post_link( $args );
}
/**
* Link to the last post in a series.
*
* @param string $format
* @param array $args
*/
function panel_get_last_post_link( $args = array() ) {
$args['order'] = 'DESC';
return panel_get_bookend_post_link( $args );
}
/**
* Get the first or last link in a series.
*
* @param array $args
*/
function panel_get_bookend_post_link( $args = array() ) {
$args['orderby'] = 'date';
$args['posts_per_page'] = 1;
$q = new WP_Query( $args );
if ( $q->have_posts() )
return get_permalink( $q->next_post()->ID );
return '';
}