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<?php

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

namespace TUTOR;

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

class Student {

/**
	 * Bagged error messages
	 *
	 * @var $error_msgs
	 */
	protected $error_msgs = '';

/**
	 * Handle Hooks
	 */
	public function __construct() {
		add_action( 'template_redirect', array( $this, 'register_student' ) );
		add_filter( 'get_avatar_url', array( $this, 'filter_avatar' ), 10, 3 );
		add_action( 'tutor_action_tutor_social_profile', array( $this, 'tutor_social_profile' ) );
		
		add_action( 'wp_ajax_tutor_profile_password_reset', array( $this, 'tutor_reset_password' ) );
		add_action( 'wp_ajax_tutor_update_profile', array( $this, 'update_profile' ) );
	}

/**
	 * Register new user and mark him as student
	 *
	 * @since v.1.0.0
	 */
	public function register_student() {
		if ( tutor_utils()->array_get( 'tutor_action', $_POST ) !== 'tutor_register_student' || ! get_option( 'users_can_register', false ) ) {
			// Action must be register, and registrtion must be enabled in dashoard
			return;
		}

// Checking nonce.
		tutor_utils()->checking_nonce();

$required_fields = apply_filters(
			'tutor_student_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();

/*
		*registration_errors
		*push into validation_errors
		*/
		$errors = apply_filters( 'registration_errors', new \WP_Error(), '', '' );
		foreach ( $errors->errors as $key => $value ) {
			$validation_errors[ $key ] = $value[0];

}

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'] = __( 'Your passwords should match each other. Please recheck.', 'tutor' );
		}

if ( count( $validation_errors ) ) {
			$this->error_msgs = $validation_errors;
			add_filter( 'tutor_student_register_validation_errors', array( $this, 'tutor_student_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()->student_role,
			'user_pass'  => $password,
		);

$user_id = wp_insert_user( $userdata );
		if ( ! is_wp_error( $user_id ) ) {
			$user = get_user_by( 'id', $user_id );
			if ( $user ) {
				wp_set_current_user( $user_id, $user->user_login );
				wp_set_auth_cookie( $user_id );
			}

do_action( 'tutor_after_student_signup', $user_id );
			// since 1.9.8 do enroll if guest attempt to enroll
			if(!empty($_POST['tutor_course_enroll_attempt'])) {
				do_action( 'tutor_do_enroll_after_login_if_attempt', $_POST['tutor_course_enroll_attempt'], $user_id );
			}
			
			// Redirect page
			$redirect_page = tutor_utils()->array_get( 'redirect_to', $_REQUEST );
			if ( ! $redirect_page ) {
				$redirect_page = tutor_utils()->tutor_dashboard_url();
			}
			wp_redirect(apply_filters('tutor_student_register_redirect_url', $redirect_page, $user));
			die();
		} else {
			$this->error_msgs = $user_id->get_error_messages();
			add_filter( 'tutor_student_register_validation_errors', array( $this, 'tutor_student_form_validation_errors' ) );
			return;
		}

$registration_page = tutor_utils()->student_register_url();
		wp_redirect( $registration_page );
		die();
	}

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

public function update_profile() {
		// Checking nonce
		tutor_utils()->checking_nonce();

$user_id = get_current_user_id();
		do_action( 'tutor_profile_update_before', $user_id );

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

$display_name = sanitize_text_field( tutor_utils()->input_old( 'display_name' ) );

$userdata = array(
			'ID'           => $user_id,
			'first_name'   => $first_name,
			'last_name'    => $last_name,
			'display_name' => $display_name,
		);
		$user_id  = wp_update_user( $userdata );

if ( ! is_wp_error( $user_id ) ) {
			update_user_meta( $user_id, 'phone_number', $phone_number );
			update_user_meta( $user_id, '_tutor_profile_bio', $tutor_profile_bio );
			update_user_meta( $user_id, '_tutor_profile_job_title', $tutor_profile_job_title );

$tutor_user_social = tutor_utils()->tutor_user_social_icons();
			foreach ( $tutor_user_social as $key => $social ) {
				$user_social_value = sanitize_text_field( tutor_utils()->input_old( $key ) );
				if ( $user_social_value ) {
					update_user_meta( $user_id, $key, $user_social_value );
				} else {
					delete_user_meta( $user_id, $key );
				}
			}
		}
		do_action( 'tutor_profile_update_after', $user_id );
		
		wp_send_json_success( array('message' => __('Profile Updated', 'tutor')) );
	}

/**
	 * Filter Avatar
	 *
	 * @param $url
	 * @param $id_or_email id or email
	 * @param $args extra args
	 *
	 * @return false|string
	 *
	 * Change avatar URL with Tutor User Photo
	 */
	public function filter_avatar( $url, $id_or_email, $args ) {
		global $wpdb;

$finder = false;

if ( is_numeric( $id_or_email ) ) {
			$finder = absint( $id_or_email );
		} elseif ( is_string( $id_or_email ) ) {
			$finder = $id_or_email;
		} elseif ( $id_or_email instanceof WP_User ) {
			// User Object
			$finder = $id_or_email->ID;
		} elseif ( $id_or_email instanceof WP_Post ) {
			// Post Object
			$finder = (int) $id_or_email->post_author;
		} elseif ( $id_or_email instanceof WP_Comment ) {
			return $url;
		}

if ( ! $finder ) {
			return $url;
		}

$user_id = (int) $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM {$wpdb->users} WHERE ID = %s OR user_email = %s ", $finder, $finder ) );
		if ( $user_id ) {
			$profile_photo = get_user_meta( $user_id, '_tutor_profile_photo', true );
			if ( $profile_photo ) {
				$size = isset($args['size']) ? $args['size'] : 'thumbnail';
				$url = wp_get_attachment_image_url( $profile_photo, $size );
			}
		}
		return $url;
	}

/**
	 * Password Rest
	 */
	public function tutor_reset_password() {
		// Checking nonce.
		tutor_utils()->checking_nonce();

$user = wp_get_current_user();

$previous_password    = sanitize_text_field( $_POST['previous_password'] );
		$new_password         = sanitize_text_field( $_POST['new_password'] );
		$confirm_new_password = sanitize_text_field( $_POST['confirm_new_password'] );

$previous_password_checked = wp_check_password( $previous_password, $user->user_pass, $user->ID );

$validation_errors = array();
		if ( ! $previous_password_checked ) {
			$validation_errors['incorrect_previous_password'] = __( 'Incorrect Previous Password', 'tutor' );
		}
		if ( empty( $new_password ) ) {
			$validation_errors['new_password_required'] = __( 'New Password Required', 'tutor' );
		}
		if ( empty( $confirm_new_password ) ) {
			$validation_errors['confirm_password_required'] = __( 'Confirm Password Required', 'tutor' );
		}
		if ( $new_password !== $confirm_new_password ) {
			$validation_errors['password_not_matched'] = __( 'New password and confirm password does not matched', 'tutor' );
		}
		
		if ( $previous_password_checked && ! empty( $new_password ) && $new_password === $confirm_new_password ) {
			wp_set_password( $new_password, $user->ID );
			wp_send_json_success( array('message' => __('Password Changed', 'tutor')) );
		}

$first_message = count($validation_errors) ? $validation_errors[array_keys($validation_errors)[0]] : __('Something went wrong!', 'tutor');
		wp_send_json_error( array('message' => $first_message) );
	}

/**
	 * Handle social links
	 *
	 * @since v2.0.0
	 */
	public function tutor_social_profile() {
		tutor_utils()->checking_nonce();

$user_id           = get_current_user_id();
		$tutor_user_social = tutor_utils()->tutor_user_social_icons();

foreach ( $tutor_user_social as $key => $social ) {
			$user_social_value = sanitize_text_field( tutor_utils()->input_old( $key ) );
			if ( '' !== $user_social_value ) {
				update_user_meta( $user_id, $key, $user_social_value );
			} else {
				delete_user_meta( $user_id, $key );
			}
		}
		wp_redirect( wp_get_raw_referer() );
		die();
	}
}