public function content( $atts ) {
		$atts = shortcode_atts(
			array(
				'id'               => null,
				'include_carousel' => true,
			),
			$atts,
			'invp_photo_slider'
		); // Use shortcode_atts_inventory_slider to filter the incoming attributes.

		// Parse boolean values to make life easy on users.
		$atts['include_carousel'] = filter_var( $atts['include_carousel'], FILTER_VALIDATE_BOOLEAN );

		if ( ! wp_style_is( 'flexslider', 'registered' ) ) {
			Inventory_Presser_Plugin::include_scripts_and_styles();
		}
		// Need flexslider for this content.
		wp_enqueue_style( 'flexslider' );
		wp_enqueue_style( 'invp-flexslider' );
		wp_enqueue_script( 'invp-flexslider' );

		// Was the post ID passed in as an argument?
		if ( ! empty( $atts['id'] ) ) {
			$post_id = intval( $atts['id'] );
		} else {
			$post_id = get_the_ID();
		}

		$image_url_lists = invp_get_the_photos( array( 'full', 'large', 'thumb' ), $post_id );

		ob_start();
		?>
		<div id="slider-width"></div>
		<div id="slider" class="flexslider">
			<ul class="slides">
			<?php

			if ( isset( $image_url_lists['large'] ) ) {
				$image_count = count( $image_url_lists['large'] );
				for ( $p = 0; $p < $image_count; $p++ ) {
					// Inventory Presser versions 8.1.0 and above provide the 'urls'.
					if ( isset( $image_url_lists['urls'][ $p ] ) ) {
						printf(
							'<li><a data-href="%s">%s</a></li>',
							esc_url( $image_url_lists['urls'][ $p ] ),
							wp_kses_post( $image_url_lists['large'][ $p ] )
						);
					} else {
						printf(
							'<li>%s</li>',
							wp_kses_post( $image_url_lists['large'][ $p ] )
						);
					}
				}
			}
			?>
			</ul>
		</div>
		<?php

		if ( $atts['include_carousel'] && isset( $image_url_lists['thumb'] ) && count( $image_url_lists['thumb'] ) > 1 ) {
			?>
			<div id="carousel" class="flexslider no-preview">
				<ul class="slides">
				<?php

				foreach ( $image_url_lists['thumb'] as $image ) {
					printf( '<li>%s</li>', wp_kses_post( $image ) );
				}

				?>
				</ul>
			</div>
			<?php
		}

		return ob_get_clean();
	}