An integration between Woocommerce and Revolution Sliders that allows adding a slider to the top of a product category.

kareless-product-sliders.php

<?php
/*
Plugin Name: Kareless Product Sliders
Plugin URI: https://kareless.com
Description: Allows you to add a Revolution slider to the top of a WooCommerce product archive
Version: 0.1.0
Author: Eric Binnion
Author URI: https://manofhustle.com
Text Domain: kareless-product-sliders
*/

class KarelessProductSliders {
	function __construct() {
		add_action( 'wp_loaded', array( $this, 'init' ) );
	}

	function init() {
		// Since this plugin integrates Revolution Slider with WooCommerce product categories,
		// make sure those plugins are activated.
		if ( class_exists( 'WooCommerce' ) && class_exists( 'RevSlider' ) ) {
			if ( is_admin() ) {
				add_action( 'product_cat_add_form_fields', array( $this, 'add_slider_select' ) );
				add_action( 'product_cat_edit_form_fields', array( $this, 'add_slider_select' ) );
				add_action( 'created_term', array( $this, 'save_field' ) , 10, 3 );
				add_action( 'edit_term', array( $this, 'save_field' ) , 10, 3 );
			} else {
				add_action( 'storefront_content_top', array( $this, 'display_slider' ), 20 );
			}
		}
	}

	function get_sliders() {
		$rev_slider = new RevSlider();
		return $rev_slider->getAllSliderAliases();
	}

	function get_cat_slider() {
		$category = get_query_var( 'product_cat' );
		$term = get_term_by( 'slug', $category, 'product_cat' );
		return get_term_meta( $term->term_id, 'kareless_product_slider', true );
	}

	function add_slider_select( $term ) {
		$slider_aliases = $this->get_sliders();
		if ( empty( $slider_aliases ) ) {
			return;
		}

		$selected = get_term_meta( $term->term_id, 'kareless_product_slider', true );
		?>
			<tr class="form-field">  
				<th scope="row" valign="top">
				<label for="kareless-slideshow-select">
						<?php _e( 'Select Slideshow', 'kareless-product-sliders' ); ?>
					</label>
				</th>
				<td>
					<select class="postform" id="kareless-slideshow-select" name="kareless-slideshow-select">
						<option value="0" <?php selected( false, $selected ); ?>>
							<?php _e( 'None', 'kareless-product-sliders' ); ?>
						</option>
						<?php foreach ( $slider_aliases as $alias ) : ?>
							<option value="<?php echo esc_attr( $alias ); ?>" <?php selected( $alias, $selected ); ?>>
								<?php echo esc_attr( $alias ); ?>
							</option>
						<?php endforeach; ?>
					</select>
					<p class="description">
						<?php _e(
							'If a slider is selected, it will be shown on the product archive page.',
							'kareless-product-sliders'
						); ?>
					</p>
				</td>
			</tr>
		<?php
	}

	function save_field( $term_id, $tt_id = '', $taxonomy_slug = '' ) {
		if ( isset( $_POST['kareless-slideshow-select'] ) && 'product_cat' === $taxonomy_slug ) {
			$slider_aliases = $this->get_sliders();
			if ( empty( $slider_aliases ) ) {
				return;
			}

			update_term_meta( $term_id, 'kareless_product_slider', sanitize_text_field( $_POST['kareless-slideshow-select'] ) );
		}
	}

	function display_slider() {
		if ( ! is_product_category() ) {
			return;
		}

		$slider = $this->get_cat_slider();
		if ( ! empty( $slider ) && checkRevSliderExists( $slider ) ) { ?>
			<div class="kareless-product-sliders" style="margin-bottom: 4.236em;">
				<?php putRevSlider( $slider ); ?>
			</div>
		<?php }
	}
}

$karelessProductSliders = new KarelessProductSliders();