<?php
/*
 Plugin Name: Affiliates Referrer Info
Plugin URI: http://www.eggemplo.com
Description: Add a shortcode to show referrer info as lineal text (name and email)
Author: eggemplo
Version: 1.0
Author URI: http://www.eggemplo.com
*/
add_action ( 'init', 'add_aff_referrer_info_shortcodes' );
function add_aff_referrer_info_shortcodes() {
    add_shortcode ( 'aff-referrer-info', 'aff_referrer_info' );
}
function aff_referrer_info ($attr = array()) {

    $output = "";
    $sep =  isset( $attr['separator'] ) ? $attr['separator'] : "<br>";
    $direct = isset( $attr['show_direct'] ) ? true : false;

    $name = isset( $attr['show_name'] ) ? true : false;
    $email = isset( $attr['show_email'] ) ? true : false;
        $show_user_id = isset( $attr['show_user_id '] ) ? true : false;

    if ( !class_exists("Affiliates_Service" ) ) {
        require_once( AFFILIATES_CORE_LIB . '/class-affiliates-service.php' );
    }

    $affiliate_id = Affiliates_Service::get_referrer_id();
    if ( $affiliate_id ) {
        $affiliate = affiliates_get_affiliate( $affiliate_id );

        if ( $direct || ( $affiliate_id !== affiliates_get_direct_id() ) ) {
            if ( $name ) {
                $output .= $affiliate['name'] . $sep;
            }

            if ( $affiliate_id ) {
                $output .= $affiliate['user_id'] . $sep;
            }

            if ( $email ) {
                $output .= $affiliate['email'] . $sep;
            }

            if ( strlen($output)>0 ) { // delete last separator
                $output = substr($output, 0, strlen($output)-strlen($sep));
            }

            if ( $show_user_id ) {
                if ( $user_id = affiliates_get_affiliate_user( $affiliate_id ) ) {
                    $user = get_user_by( 'id', $user_id );
                    // now you have a WP_User object and can add the info you need to the output
                }
            }
        }

    }

    return $output;

}
add_filter ( 'affiliates_service_affiliate_id', 'affiliates_service_affiliate_id_from_url', 10, 2 );

function affiliates_service_affiliate_id_from_url ( $affiliate_id, $service )  {
        global $wp, $wpdb;

        $pname = get_option( 'aff_pname', AFFILIATES_PNAME );
        $affiliate_id = isset( $_GET[$pname] ) ? affiliates_check_affiliate_id_encoded( trim( $_GET[$pname] ) ) : $affiliate_id;

        if ( isset( $_GET[$pname] ) ) {
                // affiliates-by-username uses this hook
                $maybe_affiliate_id = apply_filters( 'affiliates_parse_request_affiliate_id', $_GET[$pname], $affiliate_id );
                if ( ( $maybe_affiliate_id !== null ) && $maybe_affiliate_id !== trim( $_GET[$pname] ) ) {
                        $affiliate_id = $maybe_affiliate_id;
                }
        }
        return $affiliate_id;
}