Inventory_Presser_Shortcode_Slider::get_vehicle_IDs( $shortcode_atts )

	public static function get_vehicle_IDs( $shortcode_atts )
	{
		$gpargs = array(
			'posts_per_page' => 10,
			'post_type'   => INVP::POST_TYPE,
			'meta_query'  => array(
				'relation' => 'AND',
				array(
					'key'     => apply_filters( 'invp_prefix_meta_key', 'featured' ),
					'value'   => 1,
					'compare' => '=',
				),
				array(
					'key'	  => '_thumbnail_id',
					'compare' => 'EXISTS',
				)
			),
			'fields'  => 'ids',
			'orderby' => $shortcode_atts['orderby'],
			'order'   => $shortcode_atts['order'],
		);

		$inventory_ids = get_posts($gpargs);

		if (count($inventory_ids) < 10) {

			$gpargs = array(
				'posts_per_page' => 10 - (count($inventory_ids)),
				'post_type'   => INVP::POST_TYPE,
				'meta_query'  => array(
					'relation' => 'AND',
					array(
						'relation' => 'OR',
						array(
							'key'     => apply_filters( 'invp_prefix_meta_key', 'featured' ),
							'value'   => array( '', '0'),
							'compare' => 'IN'
						),
						array(
							'key'     => apply_filters( 'invp_prefix_meta_key', 'featured' ),
							'compare' => 'NOT EXISTS',
						),
					),
					array(
						'key'	  => '_thumbnail_id',
						'compare' => 'EXISTS'
					)
				),
				'fields'  => 'ids',
				'orderby' => $shortcode_atts['orderby'],
				'order'   => $shortcode_atts['order'],
			);

			$inventory_ids += get_posts($gpargs);
		}

		if( ! $inventory_ids ) {
			return [];
		}

		shuffle( $inventory_ids );

		return $inventory_ids;
	}