Electro - Add recently viewed products before footer

functions.php

/**
 * Track product views.
 */
if( ! function_exists( 'electro_wc_track_product_view' ) ) {
	function electro_wc_track_product_view() {
		if ( ! is_singular( 'product' ) ) {
			return;
		}
		
		global $post;
		
		if ( empty( $_COOKIE['electro_wc_recently_viewed'] ) ) {
			$viewed_products = array();
		} else {
			$viewed_products = (array) explode( '|', $_COOKIE['electro_wc_recently_viewed'] );
		}
		
		if ( ! in_array( $post->ID, $viewed_products ) ) {
			$viewed_products[] = $post->ID;
		}
		
		if ( sizeof( $viewed_products ) > 15 ) {
			array_shift( $viewed_products );
		}
		
		// Store for session only
		wc_setcookie( 'electro_wc_recently_viewed', implode( '|', $viewed_products ) );
	}
}

add_action( 'template_redirect', 'electro_wc_track_product_view', 20 );

if( ! function_exists( 'electro_before_footer_products_recently_viewed' ) ) {
	function electro_before_footer_products_recently_viewed() {
		
		$viewed_products = ! empty( $_COOKIE['electro_wc_recently_viewed'] ) ? (array) explode( '|', $_COOKIE['electro_wc_recently_viewed'] ) : array();
		$viewed_products = array_reverse( array_filter( array_map( 'absint', $viewed_products ) ) );

		if ( empty( $viewed_products ) ) {
			return;
		}

		$ids = implode( ',', $viewed_products );

		?>
		<section class="products-recently-viewed">
			<div class="container">
				<header>
					<h2 class="h1"><?php echo esc_html__( 'Recently Viewed Products', 'electro' ); ?></h2>
				</header>
				<?php echo do_shortcode( '[products columns=4 limit=8 ids='.$ids.']' ); ?>
			</div>
		</section>
		<?php
	}
}

add_action( 'electro_before_footer', 'electro_before_footer_products_recently_viewed', 10 );