<?php

include("include/session.php");

class Process {
    /* Class constructor */

    function Process() {
        global $session;
        // echo "<pre>";
        //    print_r($_POST);
        // echo "</pre>";
        // die();
        /* User submitted login form */
        if (isset($_POST['sublogin'])) {
            $this->procLogin();
        }
        /* User submitted registration form */
        else if (isset($_POST['subjoin'])) {
            $this->procRegister();
        }

        /* User submitted forgot password form */
        else if (isset($_POST['subforgot'])) {
            $this->procForgotPass();
        }
        /* User submitted edit account form */
        else if (isset($_POST['subedit'])) {
            $this->procEditAccount();
        }
        else if (isset($_POST['vacationsrequest'])){
            $this->vacationsRequest();
        }
                else if (isset($_POST['approvevacations'])){
            $this->approveVacations();
        }
        else if (isset($_POST['vacationdatechange'])) {
            $this->changeVacationsUpdate();
        }
        /**
         * The only other reason user should be directed here
         * is if he wants to logout, which means user is
         * logged in currently.
         */ else if ($session->logged_in) {
            $this->procLogout();
        }
        /**
         * Should not get here, which means user is viewing this page
         * by mistake and therefore is redirected.
         */ else {
            header("Location: index.php");
        }
    }

    /**
     * procLogin - Processes the user submitted login form, if errors
     * are found, the user is redirected to correct the information,
     * if not, the user is effectively logged in to the system.
     */
    function procLogin() {
        global $session, $form;
        /* Login attempt */
        $retval = $session->login($_POST['user'], $_POST['pass'], isset($_POST['remember']));

        /* Login successful */
        if ($retval) {
            $session->logged_in = 1;
            header("Location: " . $session->referrer);
        }
        /* Login failed */ else {
            $session->logged_in = null;
            $_SESSION['value_array'] = $_POST;
            $_SESSION['error_array'] = $form->getErrorArray();
            header("Location: " . $session->referrer);
        }
    }

    /**
     * procLogout - Simply attempts to log the user out of the system
     * given that there is no logout form to process.
     */
    function procLogout() {
        global $session;
        $retval = $session->logout();
        header("Location: index.php");
    }

    /**
     * procRegister - Processes the user submitted registration form,
     * if errors are found, the user is redirected to correct the
     * information, if not, the user is effectively registered with
     * the system and an email is (optionally) sent to the newly
     * created user.
     */
    function procRegister() {
        global $session, $form;
        /* Convert username to all lowercase (by option) */
        if (ALL_LOWERCASE) {
            $_POST['user'] = strtolower($_POST['user']);
        }
        /* Registration attempt */
        $retval = $session->register($_POST['user'], $_POST['pass'], $_POST['email']);

        /* Registration Successful */
        if ($retval == 0) {
            $_SESSION['reguname'] = $_POST['user'];
            $_SESSION['regsuccess'] = true;
            header("Location: " . $session->referrer);
        }
        /* Error found with form */ else if ($retval == 1) {
            $_SESSION['value_array'] = $_POST;
            $_SESSION['error_array'] = $form->getErrorArray();
            header("Location: " . $session->referrer);
        }
        /* Registration attempt failed */ else if ($retval == 2) {
            $_SESSION['reguname'] = $_POST['user'];
            $_SESSION['regsuccess'] = false;
            header("Location: " . $session->referrer);
        }
    }

    /**
     * procForgotPass - Validates the given username then if
     * everything is fine, a new password is generated and
     * emailed to the address the user gave on sign up.
     */
    function procForgotPass() {
        global $database, $session, $mailer, $form;
        /* Username error checking */
        $subuser = $_POST['user'];
        $field = "user";  //Use field name for username
        if (!$subuser || strlen($subuser = trim($subuser)) == 0) {
            $form->setError($field, "* Neįvestas vartotojo vardas<br>");
        } else {
            /* Make sure username is in database */
            $subuser = stripslashes($subuser);
            if (strlen($subuser) < 5 || strlen($subuser) > 30 ||
                    !eregi("^([0-9a-z])+$", $subuser) ||
                    (!$database->usernameTaken($subuser))) {
                $form->setError($field, "* Vartotojas neegzistuoja<br>");
            }
        }

        /* Errors exist, have user correct them */
        if ($form->num_errors > 0) {
            $_SESSION['value_array'] = $_POST;
            $_SESSION['error_array'] = $form->getErrorArray();
        }
        /* Generate new password and email it to user */ else {
            /* Generate new password */
            $newpass = $session->generateRandStr(8);

            /* Get email of user */
            $usrinf = $database->getUserInfo($subuser);
            $email = $usrinf['email'];

            /* Attempt to send the email with new password */
            if ($mailer->sendNewPass($subuser, $email, $newpass)) {
                /* Email sent, update database */
                $database->updateUserField($subuser, "password", md5($newpass));
                $_SESSION['forgotpass'] = true;
            }
            /* Email failure, do not change password */ else {
                $_SESSION['forgotpass'] = false;
            }
        }

        header("Location: " . $session->referrer);
    }

    /**
     * procEditAccount - Attempts to edit the user's account
     * information, including the password, which must be verified
     * before a change is made.
     */
    function procEditAccount() {
        global $session, $form;
        /* Account edit attempt */
        $retval = $session->editAccount($_POST['curpass'], $_POST['newpass'], $_POST['confirm-newpass'], $_POST['email']);

        /* Account edit successful */
        if ($retval) {
            $_SESSION['useredit'] = true;
            header("Location: " . $session->referrer);
        }
        /* Error found with form */ else {
            $_SESSION['value_array'] = $_POST;
            $_SESSION['error_array'] = $form->getErrorArray();
            header("Location: " . $session->referrer);
        }
    }

       function changeVacationsUpdate() {
        global $session, $database, $form;
        /* Username error checking */
        // echo "<pre>";
        //    print_r($_POST);
        // echo "</pre>";
        // die();
        /* Errors exist, have user correct them */
        if ($form->num_errors > 0) {
            // die();
            $_SESSION['value_array'] = $_POST;
            $_SESSION['error_array'] = $form->getErrorArray();
            header("Location: " . $session->referrer);

        }
        /* Update user olevel */ else {
            $datefrom = $_POST['datefrom'];
            $dateto = $_POST['dateto'];
            if(strtotime($datefrom) > strtotime($dateto)) {
                $tempdate = $datefrom;
                $datefrom = $dateto;
                $dateto = $tempdate;
            }
            $today=date("Y-m-d");
            if ($datefrom > date('Y-m-d', strtotime($today . ' +14 days'))){

                // echo $datefrom;
                // die();

                $database->updateRequestField($_POST['vacation_request_id'], "vacations_from", $datefrom);
                $database->updateRequestField($_POST['vacation_request_id'], "vacations_till", $dateto);

            }
            else {
                $_SESSION['datechangeerror'] = false;
            }
            header("Location: " . $session->referrer . "?username=" . $_POST['username']);
        }

    }

    /**
     */
    function vacationsRequest() {
        global $session, $database, $form;
        $vacationsRequest = $_POST;

        // echo "<pre>";
        //    print_r($vacationsRequest);
        // echo "</pre>";
        // die();


        if( (isset($vacationsRequest['datefrom']) &&
            !strlen($vacationsRequest['datefrom'] = trim($vacationsRequest['datefrom'])) == 0) &&
            (isset($vacationsRequest['dateto']) &&
            !strlen($vacationsRequest['dateto'] = trim($vacationsRequest['dateto'])) == 0)
        ) {
            $vacationsRequest['username'] = $session->username;

        $datefrom = new DateTime($vacationsRequest['datefrom']);
        $dateto = new DateTime($vacationsRequest['dateto']);
        $days_until_appt = $dateto->diff($datefrom)->days+1;
        $user_info = $database->getUserInfo($vacationsRequest['username']);
                                if($user_info != NULL) {
                $max_days = $user_info['max_vacation_days'];
                if ($days_until_appt <= $max_days) {
                $return = $database->saveVacations($vacationsRequest);
                $_SESSION['maxdatechangeerror'] = true;
            if($return) {

            }
                }
            else {
                $_SESSION['maxdatechangeerror'] = false;
            }
            }

        }


        // die();
        header("Location: " . $session->referrer);

    }
}

    function approveVacations() {
        global $session, $database, $form;
        $approveVacations = $_POST;
        // echo "<pre>";
        //    print_r($vacationsRequest);
        // echo "</pre>";
        // die();


        if( (isset($approveVacations['datefrom']) &&
            !strlen($approveVacations['datefrom'] = trim($approveVacations['datefrom'])) == 0) &&
            (isset($approveVacations['dateto']) &&
            !strlen($approveVacations['dateto'] = trim($approveVacations['dateto'])) == 0)
        ) {
            $approveVacations['username'] = $session->username;

            // echo "<br>rezultatai:";
            // echo "<pre>";
            //    print_r($vacationsRequest);
            // echo "</pre>";
            // die();
            $return = $database->saveApprovedVacations($approveVacations);

            if($return) {

            }
        }


        // die();
        header("Location: " . $session->referrer);

    }

/* Initialize process */
$process = new Process;
?>