<?php
/**
* Theme Tools: functions for Featured Images fallback.
*
* @package automattic/jetpack
*/
/**
* Get one image from a specified post in the following order:
* Featured Image then first image from the_content HTML
* and filter the post_thumbnail_html
*
* @param string $html The HTML for the image markup.
* @param int $post_id The post ID to check.
* @param int $post_thumbnail_id The ID of the featured image.
* @param string $size The image size to return, defaults to 'post-thumbnail'.
* @param string|array $attr Optional. Query string or array of attributes.
*
* @return string $html Thumbnail image with markup.
*/
function jetpack_featured_images_fallback_get_image( $html, $post_id, $post_thumbnail_id, $size, $attr ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
$opts = jetpack_featured_images_get_settings();
if ( ! empty( $html ) || (bool) 1 !== (bool) $opts['fallback-option'] ) {
return trim( $html );
}
if ( jetpack_featured_images_should_load() ) {
if (
( true === $opts['archive'] && ( is_home() || is_archive() || is_search() ) && ! $opts['archive-option'] )
|| ( true === $opts['post'] && is_single() && ! $opts['post-option'] )
|| ! $opts['fallback-option']
) {
return trim( $html );
}
}
if ( class_exists( 'Jetpack_PostImages' ) ) {
global $_wp_additional_image_sizes;
$args = array(
'from_thumbnail' => false,
'from_slideshow' => true,
'from_gallery' => true,
'from_attachment' => false,
);
$image = Jetpack_PostImages::get_image( $post_id, $args );
if ( ! empty( $image ) ) {
$image['width'] = '';
$image['height'] = '';
$image['crop'] = '';
if ( array_key_exists( $size, $_wp_additional_image_sizes ) ) {
$image['width'] = $_wp_additional_image_sizes[ $size ]['width'];
$image['height'] = $_wp_additional_image_sizes[ $size ]['height'];
$image['crop'] = $_wp_additional_image_sizes[ $size ]['crop'];
}
$image_src = Jetpack_PostImages::fit_image_url( $image['src'], $image['width'], $image['height'] );
// Use the theme's crop setting rather than forcing to true.
$image_src = add_query_arg( 'crop', $image['crop'], $image_src );
$html = '<img src="' . esc_url( $image_src ) . '" title="' . esc_attr( wp_strip_all_tags( get_the_title() ) ) . '" class="attachment-' . esc_attr( $size ) . ' wp-post-image" />';
return trim( $html );
}
}
return trim( $html );
}
add_filter( 'post_thumbnail_html', 'jetpack_featured_images_fallback_get_image', 10, 5 );
/**
* Get URL of one image from a specified post in the following order:
* Featured Image then first image from the_content HTML
*
* @param int $post_id The post ID to check.
* @param int $post_thumbnail_id The ID of the featured image.
* @param string $size The image size to return, defaults to 'post-thumbnail'.
*
* @return string|null $image_src The URL of the thumbnail image.
*/
function jetpack_featured_images_fallback_get_image_src( $post_id, $post_thumbnail_id, $size ) {
$image_src = wp_get_attachment_image_src( $post_thumbnail_id, $size );
$image_src = ( ! empty( $image_src[0] ) ) ? $image_src[0] : null;
$opts = jetpack_featured_images_get_settings();
if ( ! empty( $image_src ) || (bool) 1 !== (bool) $opts['fallback-option'] ) {
return esc_url( $image_src );
}
if ( jetpack_featured_images_should_load() ) {
if ( ( true === $opts['archive'] && ( is_home() || is_archive() || is_search() ) && ! $opts['archive-option'] )
|| ( true === $opts['post'] && is_single() && ! $opts['post-option'] ) ) {
return esc_url( $image_src );
}
}
if ( class_exists( 'Jetpack_PostImages' ) ) {
global $_wp_additional_image_sizes;
$args = array(
'from_thumbnail' => false,
'from_slideshow' => true,
'from_gallery' => true,
'from_attachment' => false,
);
$image = Jetpack_PostImages::get_image( $post_id, $args );
if ( ! empty( $image ) ) {
$image['width'] = '';
$image['height'] = '';
$image['crop'] = '';
if ( array_key_exists( $size, $_wp_additional_image_sizes ) ) {
$image['width'] = $_wp_additional_image_sizes[ $size ]['width'];
$image['height'] = $_wp_additional_image_sizes[ $size ]['height'];
$image['crop'] = $_wp_additional_image_sizes[ $size ]['crop'];
}
$image_src = Jetpack_PostImages::fit_image_url( $image['src'], $image['width'], $image['height'] );
// Use the theme's crop setting rather than forcing to true.
$image_src = add_query_arg( 'crop', $image['crop'], $image_src );
return esc_url( $image_src );
}
}
return esc_url( $image_src );
}
/**
* Check if post has an image attached, including a fallback.
*
* @param int $post The post ID to check.
*
* @return bool
*/
function jetpack_has_featured_image( $post = null ) {
return (bool) get_the_post_thumbnail( $post );
}
/**
* Adds custom class to the array of post classes.
*
* @param array $classes Classes for the post element.
* @param array $class Optional. Comma separated list of additional classes.
* @param array $post_id Unique The post ID to check.
*
* @return array $classes
*/
function jetpack_featured_images_post_class( $classes, $class, $post_id ) {
$post_password_required = post_password_required( $post_id );
$opts = jetpack_featured_images_get_settings();
if ( jetpack_has_featured_image( $post_id ) && (bool) 1 === (bool) $opts['fallback-option'] && ! is_attachment() && ! $post_password_required && 'post' === get_post_type() ) {
$classes[] = 'has-post-thumbnail';
}
return $classes;
}
add_filter( 'post_class', 'jetpack_featured_images_post_class', 10, 3 );