<?php
// If accessed directly, exit.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * This class is responsible for catching all ajax calls in wpaf
 *
 * @author CouponThemes
 * @since 1.0.1
 */
class WPAF_AJAX {

    /**
     * Hook in methods - uses WordPress ajax handlers (admin-ajax).
     */
    public static function LoadEvents() {

        $ajax_events = array(
            'vote' => true,
        );

        foreach ( $ajax_events as $ajax_event => $status ) {
            if ( $status ) {
                add_action( 'wp_ajax_wpaf_' . $ajax_event, array( __CLASS__, $ajax_event ) );
                add_action( 'wp_ajax_nopriv_wpaf_' . $ajax_event, array( __CLASS__, $ajax_event ) );
            }
        }
    }

    /**
     * AJAX adding new vote
     */
    public static function vote() {
        if ( ! check_ajax_referer( 'wpaf-security-nonce', 'security' ) ) {
            wp_die();
        }
        $coupon_id = isset( $_POST['coupon_id'] ) ? absint( wp_unslash( $_POST['coupon_id'] ) ) : 0;
        $meta      = isset( $_POST['meta'] ) ? sanitize_key( wp_unslash( $_POST['meta'] ) ) : '';

        if ( $meta === "up" || $meta === "down" ) {
            $up_count   = absint( get_post_meta( $coupon_id, '_up_count', true ) );
            $down_count = absint( get_post_meta( $coupon_id, '_down_count', true ) );

            if ( 0 === $up_count && 0 === $down_count ) {
                $up_count   = count( array_filter( explode( ",", get_post_meta( $coupon_id, "_up", true ) ) ) );
                $down_count = count( array_filter( explode( ",", get_post_meta( $coupon_id, "_down", true ) ) ) );
            }

            if ( 'up' === $meta ) {
                $up_count++;
                update_post_meta( $coupon_id, '_up_count', $up_count );
            } else {
                $down_count++;
                update_post_meta( $coupon_id, '_down_count', $down_count );
            }

            $all_votes = $up_count + $down_count;
            $percent   = $all_votes > 0 ? (int) ceil( $up_count / $all_votes * 100 ) : 100;
            /* translators: %d: integer percent of upvotes */
            echo esc_html( sprintf( __( '%d%% Success', 'affcoupon' ), $percent ) );

        } else {
            echo esc_html__( 'Failed', 'affcoupon' );
        }
        wp_die();
    }

}