Instructor.php

<?php

/**
 * Class Instructor
 * @package TUTOR
 *
 * @since v.1.0.0
 */

namespace TUTOR;

if ( ! defined( 'ABSPATH' ) )
    exit;


class Instructor {

    protected $error_msgs = '';
    public function __construct() {
        add_action('template_redirect', array($this, 'register_instructor'));
        add_action('template_redirect', array($this, 'apply_instructor'));

        //Add instructor from admin panel.
        add_action('wp_ajax_tutor_add_instructor', array($this, 'add_new_instructor'));
    }

    /**
     * Register new user and mark him as instructor
     *
     * @since v.1.0.0
     */
    public function register_instructor(){
        if ( ! isset($_POST['tutor_action'])  ||  $_POST['tutor_action'] !== 'tutor_register_instructor' ){
            return;
        }
        //Checking nonce
        tutor_utils()->checking_nonce();

        $required_fields = apply_filters('tutor_instructor_registration_required_fields', array(
            'first_name'                => __('First name field is required', 'tutor'),
            'last_name'                 =>  __('Last name field is required', 'tutor'),
            'email'                     => __('E-Mail field is required', 'tutor'),
            'user_login'                => __('User Name field is required', 'tutor'),
            'password'                  => __('Password field is required', 'tutor'),
            'password_confirmation'     => __('Password Confirmation field is required', 'tutor'),
        ));

        $validation_errors = array();
        foreach ($required_fields as $required_key => $required_value){
            if (empty($_POST[$required_key])){
                $validation_errors[$required_key] = $required_value;
            }
        }

        if (!filter_var(tutor_utils()->input_old('email'), FILTER_VALIDATE_EMAIL)) {
            $validation_errors['email'] = __('Valid E-Mail is required', 'tutor');
        }
        if (tutor_utils()->input_old('password') !== tutor_utils()->input_old('password_confirmation')){
            $validation_errors['password_confirmation'] = __('Confirm password does not matched with Password field', 'tutor');
        }

        if (count($validation_errors)){
            $this->error_msgs = $validation_errors;
            add_filter('tutor_instructor_register_validation_errors', array($this, 'tutor_instructor_form_validation_errors'));
            return;
        }

        $first_name     = sanitize_text_field(tutor_utils()->input_old('first_name'));
        $last_name      = sanitize_text_field(tutor_utils()->input_old('last_name'));
        $email          = sanitize_text_field(tutor_utils()->input_old('email'));
        $user_login     = sanitize_text_field(tutor_utils()->input_old('user_login'));
        $password       = sanitize_text_field(tutor_utils()->input_old('password'));

        $userdata = array(
            'user_login'    =>  $user_login,
            'user_email'    =>  $email,
            'first_name'    =>  $first_name,
            'last_name'     =>  $last_name,
            //'role'          =>  tutor()->instructor_role,
            'user_pass'     =>  $password,
        );

        $user_id = wp_insert_user( $userdata ) ;
        if ( ! is_wp_error($user_id)){
            update_user_meta($user_id, '_is_tutor_instructor', time());
            update_user_meta($user_id, '_tutor_instructor_status', apply_filters('tutor_initial_instructor_status', 'pending'));

            $user = get_user_by( 'id', $user_id );
            if( $user ) {
                wp_set_current_user( $user_id, $user->user_login );
                wp_set_auth_cookie( $user_id );
            }
        }else{
            $this->error_msgs = $user_id->get_error_messages();
            add_filter('tutor_instructor_register_validation_errors', array($this, 'tutor_instructor_form_validation_errors'));
            return;
        }

        wp_redirect(tutor_utils()->input_old('_wp_http_referer'));
        die();
    }

    public function tutor_instructor_form_validation_errors(){
        return $this->error_msgs;
    }

    /**
     *
     * Usage for instructor applying when a user already logged in
     *
     * @since v.1.0.0
     */
    public function apply_instructor(){
        if ( ! isset($_POST['tutor_action'])  ||  $_POST['tutor_action'] !== 'tutor_apply_instructor' ){
            return;
        }
        //Checking nonce
        tutor_utils()->checking_nonce();

        $user_id = get_current_user_id();
        if ($user_id){
            if (tutor_utils()->is_instructor()){
                die(__('Already applied for instructor', 'tutor'));
            }else{
                update_user_meta($user_id, '_is_tutor_instructor', time());
                update_user_meta($user_id, '_tutor_instructor_status', apply_filters('tutor_initial_instructor_status', 'pending'));
            }
        }else{
            die(__('Permission denied', 'tutor'));
        }

        wp_redirect(tutor_utils()->input_old('_wp_http_referer'));
        die();
    }


    public function add_new_instructor(){
        $required_fields = apply_filters('tutor_instructor_registration_required_fields', array(
            'first_name'                => __('First name field is required', 'tutor'),
            'last_name'                 =>  __('Last name field is required', 'tutor'),
            'email'                     => __('E-Mail field is required', 'tutor'),
            'user_login'                => __('User Name field is required', 'tutor'),
            'phone_number'              => __('Phone Number field is required', 'tutor'),
            'password'                  => __('Password field is required', 'tutor'),
            'password_confirmation'     => __('Password Confirmation field is required', 'tutor'),
        ));

        $validation_errors = array();
        foreach ($required_fields as $required_key => $required_value){
            if (empty($_POST[$required_key])){
                $validation_errors[$required_key] = $required_value;
            }
        }

        if (!filter_var(tutor_utils()->input_old('email'), FILTER_VALIDATE_EMAIL)) {
            $validation_errors['email'] = __('Valid E-Mail is required', 'tutor');
        }
        if (tutor_utils()->input_old('password') !== tutor_utils()->input_old('password_confirmation')){
            $validation_errors['password_confirmation'] = __('Confirm password does not matched with Password field', 'tutor');
        }

        if (count($validation_errors)){
            wp_send_json_error(array('errors' => $validation_errors));
        }

        $first_name     = sanitize_text_field(tutor_utils()->input_old('first_name'));
        $last_name      = sanitize_text_field(tutor_utils()->input_old('last_name'));
        $email          = sanitize_text_field(tutor_utils()->input_old('email'));
        $user_login     = sanitize_text_field(tutor_utils()->input_old('user_login'));
        $phone_number   = sanitize_text_field(tutor_utils()->input_old('phone_number'));
        $password       = sanitize_text_field(tutor_utils()->input_old('password'));
        $tutor_profile_bio = wp_kses_post(tutor_utils()->input_old('tutor_profile_bio'));

        $userdata = apply_filters('add_new_instructor_data', array(
            'user_login'    =>  $user_login,
            'user_email'    =>  $email,
            'first_name'    =>  $first_name,
            'last_name'     =>  $last_name,
            'role'          =>  tutor()->instructor_role,
            'user_pass'     =>  $password,
        ));

        do_action('tutor_add_new_instructor_before');

        $user_id = wp_insert_user( $userdata ) ;
        if ( ! is_wp_error($user_id)) {
            update_user_meta($user_id, 'phone_number', $phone_number);
            update_user_meta($user_id, 'description', $tutor_profile_bio);
            update_user_meta($user_id, '_tutor_profile_bio', $tutor_profile_bio);
            update_user_meta($user_id, '_is_tutor_instructor', time());
            update_user_meta($user_id, '_tutor_instructor_status', apply_filters('tutor_initial_instructor_status', 'approved'));

            do_action('tutor_add_new_instructor_after', $user_id);

            wp_send_json_success(array('msg' => __('Instructor has been added successfully', 'tutor') ));
        }

        wp_send_json_error(array('errors' => $user_id));
    }

}