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<?php
/**
* Common theme functions
*
* @package WordPress
* @subpackage Twenty_Nineteen
* @since Twenty Nineteen 1.5
*/
/**
* Determines if post thumbnail can be displayed.
*/
function twentynineteen_can_show_post_thumbnail() {
return apply_filters( 'twentynineteen_can_show_post_thumbnail', ! post_password_required() && ! is_attachment() && has_post_thumbnail() );
}
/**
* Returns true if image filters are enabled on the theme options.
*/
function twentynineteen_image_filters_enabled() {
return 0 !== get_theme_mod( 'image_filter', 1 );
}
/**
* Returns the size for avatars used in the theme.
*/
function twentynineteen_get_avatar_size() {
return 60;
}
/**
* Returns true if comment is by author of the post.
*
* @see get_comment_class()
*/
function twentynineteen_is_comment_by_post_author( $comment = null ) {
if ( is_object( $comment ) && $comment->user_id > 0 ) {
$user = get_userdata( $comment->user_id );
$post = get_post( $comment->comment_post_ID );
if ( ! empty( $user ) && ! empty( $post ) ) {
return $comment->user_id === $post->post_author;
}
}
return false;
}
/**
* Returns information about the current post's discussion, with cache support.
*/
function twentynineteen_get_discussion_data() {
static $discussion, $post_id;
$current_post_id = get_the_ID();
if ( $current_post_id === $post_id ) {
return $discussion; /* If we have discussion information for post ID, return cached object */
} else {
$post_id = $current_post_id;
}
$comments = get_comments(
array(
'post_id' => $current_post_id,
'orderby' => 'comment_date_gmt',
'order' => get_option( 'comment_order', 'asc' ), /* Respect comment order from Settings ยป Discussion. */
'status' => 'approve',
'number' => 20, /* Only retrieve the last 20 comments, as the end goal is just 6 unique authors */
)
);
$authors = array();
foreach ( $comments as $comment ) {
$authors[] = ( (int) $comment->user_id > 0 ) ? (int) $comment->user_id : $comment->comment_author_email;
}
$authors = array_unique( $authors );
$discussion = (object) array(
'authors' => array_slice( $authors, 0, 6 ), /* Six unique authors commenting on the post. */
'responses' => get_comments_number( $current_post_id ), /* Number of responses. */
);
return $discussion;
}
/**
* Converts HSL to HEX colors.
*/
function twentynineteen_hsl_hex( $h, $s, $l, $to_hex = true ) {
$h /= 360;
$s /= 100;
$l /= 100;
$r = $l;
$g = $l;
$b = $l;
$v = ( $l <= 0.5 ) ? ( $l * ( 1.0 + $s ) ) : ( $l + $s - $l * $s );
if ( $v > 0 ) {
$m = $l + $l - $v;
$sv = ( $v - $m ) / $v;
$h *= 6.0;
$sextant = floor( $h );
$fract = $h - $sextant;
$vsf = $v * $sv * $fract;
$mid1 = $m + $vsf;
$mid2 = $v - $vsf;
switch ( $sextant ) {
case 0:
$r = $v;
$g = $mid1;
$b = $m;
break;
case 1:
$r = $mid2;
$g = $v;
$b = $m;
break;
case 2:
$r = $m;
$g = $v;
$b = $mid1;
break;
case 3:
$r = $m;
$g = $mid2;
$b = $v;
break;
case 4:
$r = $mid1;
$g = $m;
$b = $v;
break;
case 5:
$r = $v;
$g = $m;
$b = $mid2;
break;
}
}
$r = round( $r * 255, 0 );
$g = round( $g * 255, 0 );
$b = round( $b * 255, 0 );
if ( $to_hex ) {
$r = ( $r < 15 ) ? '0' . dechex( $r ) : dechex( $r );
$g = ( $g < 15 ) ? '0' . dechex( $g ) : dechex( $g );
$b = ( $b < 15 ) ? '0' . dechex( $b ) : dechex( $b );
return "#$r$g$b";
}
return "rgb($r, $g, $b)";
}
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