functions.php

<?php

add_action('blocksy:pro:content-blocks:pre-output', function ($id) {
	if (! function_exists('wopb_function')) {
		return;
	}

	add_action('wp_enqueue_scripts', function () {
		$init = new \WOPB\Initialization();
		$init->register_scripts_common();
	});

	$save_as = wopb_function()->get_setting('css_save_as');
	$save_as = $save_as ? $save_as : '';

	if ($save_as === 'filesystem') {
		add_action('wp_enqueue_scripts', function () use ($id) {
			wopb_function()->set_css_style($id);
		});
	} else {
		add_action('wp_head', function () use ($id) {
			$post_id = $id;

			if (! $post_id) {
				return;
			}

			$upload_dir_url = wp_get_upload_dir();
			$upload_css_dir_url = trailingslashit( $upload_dir_url['basedir'] );
			$css_dir_path = $upload_css_dir_url."product-blocks/wopb-css-{$post_id}.css";

			// Reusable CSS
			$reusable_css = '';
			$reusable_id = wopb_function()->reusable_id($post_id);

			foreach ($reusable_id as $id) {
				$reusable_dir_path = $upload_css_dir_url."product-blocks/wopb-css-{$id}.css";

				if (file_exists($reusable_dir_path)) {
					$reusable_css .= file_get_contents($reusable_dir_path);
				}else{
					$reusable_css .= get_post_meta($id, '_wopb_css', true);
				}
			}

			if (file_exists($css_dir_path)) {
				echo '<style type="text/css">'.file_get_contents($css_dir_path).$reusable_css.'</style>';
			} else {
				$css = get_post_meta($post_id, '_wopb_css', true);

				if($css) {
					echo '<style type="text/css">'.$css.$reusable_css.'</style>';
				}
			}
		}, 100);
	}
});