Automattic / jetpack

modules/theme-tools/content-options/featured-images.php

<?php
/**
 * The function to prevent for Featured Images to be displayed in a theme.
 */
function jetpack_featured_images_remove_post_thumbnail( $metadata, $object_id, $meta_key, $single ) {
	$opts = jetpack_featured_images_get_settings();

	/**
	 * Allow featured images to be displayed at all times for specific CPTs.
	 *
	 * @module theme-tools
	 *
	 * @since 9.1.0
	 *
	 * @param array $excluded_post_types Array of excluded post types.
	 */
	$excluded_post_types = apply_filters(
		'jetpack_content_options_featured_image_exclude_cpt',
		array( 'jp_pay_product' )
	);

	// Automatically return metadata for specific post types, when we don't want to hide the Featured Image.
	if ( in_array( get_post_type( $object_id ), $excluded_post_types, true ) ) {
		return $metadata;
	}

	// Return false if the archive option or singular option is unticked.
	if (
		( true === $opts['archive']
			&& ( is_home() || is_archive() || is_search() )
			&& ! jetpack_is_shop_page()
			&& ! $opts['archive-option']
			&& ( isset( $meta_key )
			&& '_thumbnail_id' === $meta_key )
			&& in_the_loop()
		)
		|| ( true === $opts['post']
			&& is_single()
			&& ! jetpack_is_product()
			&& ! $opts['post-option']
			&& ( isset( $meta_key )
			&& '_thumbnail_id' === $meta_key )
			&& in_the_loop()
		)
		|| ( true === $opts['page']
			&& is_singular()
			&& is_page()
			&& ! $opts['page-option']
			&& ( isset( $meta_key )
			&& '_thumbnail_id' === $meta_key )
			&& in_the_loop()
		)
		|| ( true === $opts['portfolio']
			&& post_type_exists( 'jetpack-portfolio' )
			&& is_singular( 'jetpack-portfolio' )
			&& ! $opts['portfolio-option']
			&& ( isset( $meta_key )
			&& '_thumbnail_id' === $meta_key )
			&& in_the_loop()
		)
	) {
		return false;
	} else {
		return $metadata;
	}
}
add_filter( 'get_post_metadata', 'jetpack_featured_images_remove_post_thumbnail', true, 4 );

true is of type boolean, but the function expects a integer.

/**
 * Check if we are in a WooCommerce Product in order to exclude it from the is_single check.
 */
function jetpack_is_product() {
	return ( function_exists( 'is_product' ) ) ? is_product() : false;
}

/**
 * Check if we are in a WooCommerce Shop in order to exclude it from the is_archive check.
 */
function jetpack_is_shop_page() {
	// Check if WooCommerce is active first.
	if ( ! class_exists( 'WooCommerce' ) ) {
		return false;
	}

	global $wp_query;

	$front_page_id        = get_option( 'page_on_front' );
	$current_page_id      = $wp_query->get( 'page_id' );
	$is_static_front_page = 'page' === get_option( 'show_on_front' );

	if ( $is_static_front_page && $front_page_id === $current_page_id ) {
		$is_shop_page = ( $current_page_id === wc_get_page_id( 'shop' ) ) ? true : false;
	} else {
		$is_shop_page = is_shop();
	}

	return $is_shop_page;
}