CourselistMaker.php

<?php
declare(strict_types = 1);
require_once "CurlRequest.php";

class CourselistMaker
{
    const DELAY = 1; // delay between page refreshes when they can't be reached, in seconds

    private $cookieFile;
    private $curlHandler;
    private $loggedIn = false;
    private $currCourses = [];

    public function __construct()
    {
        $this->cookieFile = tempnam(__DIR__ . "/tmp/", "clmaker-ckk-");
        $this->curlHandler = new CurlRequest(null, ["cookie" => $this->cookieFile]);
        $this->curlHandler->setExtra([
            CURLOPT_ENCODING => 'gzip, deflate',
            CURLOPT_HTTPHEADER => [
                "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
                "Accept-Encoding: gzip, deflate",
                "Accept-Language: tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3",
                "Connection: keep-alive",
                "Accept-Encoding: keep-alive"
            ],
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_TIMEOUT => 45,
            CURLOPT_CONNECTTIMEOUT => 45
        ]);
    }

    /**
     * @param string|int $userid Student number
     * @param string|int $pass Password for registration.boun.edu.tr
     */
    public function login($userid, $pass)
    {
        while (($loginResponse = $this->curlHandler->get("https://registration.boun.edu.tr/scripts/loginst.asp", [
                "user_id" => $userid,
                "user_pass" => $pass
            ])) === false) {
            echo "- Couldn't reach the login page, trying again." . PHP_EOL;
            $this->sleep();
        }
        if (preg_match("#30 seconds#si", $loginResponse)) {
            echo "- Waiting 30 seconds to login" . PHP_EOL;
            sleep(5);
            $this->login($userid, $pass);
            return;
        } else if (preg_match("#(Invalid login)|(Wrong User)#si", $loginResponse)) {
            echo "- Invalid user ID & password combination." . PHP_EOL;
            return;
        }
        echo "+ Successfully logged in." . PHP_EOL;
        $this->loggedIn = true;
    }

    private function sleep()
    {
        usleep(self::DELAY * 1000000);
    }

    private function checkLoginStatus()
    {
        if ($this->loggedIn !== true) {
            echo "- You must login before adding courses." . PHP_EOL;
            die();
        }
    }

    /**
     * A single course or multiple courses in an array are both acceptable as parameters.
     *
     * @param mixed $courseAbbr Course abbreviation (e.g. CMPE, MATH)
     * @param mixed $courseCode Course code (e.g. 101,150)
     * @param mixed $section Course secttion (e.g. 01,02)
     * @param array|bool $nc Non-credit(true) or credit(false)
     * @return string Response message from server
     */
    public function addCourse($courseAbbr, $courseCode, $section, $nc = false)
    {
        $this->checkLoginStatus();
        if (!is_array($courseAbbr))
            $courseAbbr = (array)$courseAbbr;
        if (!is_array($courseCode))
            $courseCode = (array)$courseCode;
        if (!is_array($section))
            $section = (array)$section;
        if (!is_array($nc))
            $nc = (array)$nc;

        $postData = [
            "D1" => "REQUIRED COURSE",
            "B1" => "Quick Add",
            "formaction" => ""
        ];

        for ($i = 1; $i < 8; ++$i) {
            $postData["abbr" . $i] = array_key_exists($i - 1, $courseAbbr) ? $courseAbbr[$i - 1] : "";
            $postData["code" . $i] = array_key_exists($i - 1, $courseCode) ? $courseCode[$i - 1] : "";
            $postData["section" . $i] = array_key_exists($i - 1, $section) ? $section[$i - 1] : "01";
            $postData["rnc" . $i] = array_key_exists($i - 1, $nc) ? ($nc[$i - 1] === true ? "NC" : "N") : "N";
            $postData["rcourse" . $i] = "";
        }

        while (($addCourseResponse = $this->curlHandler->get("https://registration.boun.edu.tr/scripts/studentaction.asp", $postData, [
                CURLOPT_REFERER => "https://registration.boun.edu.tr/scripts/student.asp"
            ])) === false) {
            echo "- Couldn't reach the course list preparation page, trying again." . PHP_EOL;
            $this->sleep();
        }

        preg_match("#Add[^-]*Drop[^-]*Action[^-]*Warnings[^-]*Start[^>]*>(.*?)<!---#si", $addCourseResponse, $responseWarnings);
        while (!array_key_exists(1, $responseWarnings)) {
            while (($addCourseResponse = $this->curlHandler->get("https://registration.boun.edu.tr/scripts/studentaction.asp", $postData, [
                    CURLOPT_REFERER => "https://registration.boun.edu.tr/scripts/student.asp"
                ])) === false) {
                echo "- Couldn't reach the course list preparation page, trying again." . PHP_EOL;
                $this->sleep();
            }
            echo "- Trying again to add the courses." . PHP_EOL;
            preg_match("#Add[^-]*Drop[^-]*Action[^-]*Warnings[^-]*Start[^>]*>(.*?)<!---#si", $addCourseResponse, $responseWarnings);
        }
        echo "+ Course add request is sent, response:" . PHP_EOL;
        $responseWarnings = preg_replace("/\s+/", " ", strip_tags($responseWarnings[1]));
        echo $responseWarnings . PHP_EOL;

        $this->currCourses = [];
        return $responseWarnings;
    }

    public function changeSection($courseAbbr, $courseCode, $newSection)
    {
        if (strlen((string)$newSection) == 1) $newSection = "0" . $newSection;
        $this->checkLoginStatus();

        /* Not necessary, lel.
        $postData = [
            "R1" => "{$courseAbbr}  {$courseCode}." . str_pad($section, 2, "0", STR_PAD_LEFT) . ".0.0",
            "D1" => "REQUIRED COURSE",
            "B1" => "Change Section",
            "formaction" => ""
        ];
        while (($changeSectionResponse = $this->curlHandler->get("https://registration.boun.edu.tr/scripts/studentaction.asp", $postData, [
                CURLOPT_REFERER => "https://registration.boun.edu.tr/scripts/student.asp"
            ])) === false) {
            echo "- Couldn't reach the change section page, trying again." . PHP_EOL;
            $this->sleep();
        }
        */

        $postData = [
            "B1" => "Change",
            "R1" => "{$courseAbbr} {$courseCode}.{$newSection}"
        ];

        while (($changeSectionResponse = $this->curlHandler->get("https://registration.boun.edu.tr/scripts/secchaact.asp", $postData, [
                CURLOPT_REFERER => "https://registration.boun.edu.tr/scripts/studentaction.asp"
            ])) === false) {
            echo "- Couldn't make the section change request, trying again." . PHP_EOL;
            $this->sleep();
        }
        preg_match("#<font[^>]*>(.*?)</font>#si", $changeSectionResponse, $responseWarnings);

        if (empty($responseWarnings[1])) {
            echo "+ Section is changed.";
            return true;
        }

        echo "+ Section change request is sent for {$courseAbbr} {$courseCode}.{$newSection}, response:" . PHP_EOL;
        echo preg_replace("/\s+/", " ", strip_tags($responseWarnings[1])) . PHP_EOL;
        return false;
    }

    public function sendConsent($courseAbbr, $courseCode, $section, $msg)
    {
        if (strlen((string)$section) == 1) $section = "0" . $section;
        if (strlen($msg) > 400) {
            echo "- Your message is too long, it can have a max. of 400 characters." . PHP_EOL;
            return;
        }
        $this->checkLoginStatus();
        while (($consentResponse = $this->curlHandler->get("https://registration.boun.edu.tr/scripts/stuconsent.asp", [
                "action" => "add",
                "courseabbr" => "",
                "coursename" => "{$courseAbbr} {$courseCode}.{$section}",
                "comment" => $msg,
                "remLen2" => (400 - strlen($msg))
            ], [
                CURLOPT_REFERER => "https://registration.boun.edu.tr/scripts/stuconsent.asp"
            ])) === false) {
            echo "- Couldn't reach the consent page, trying again." . PHP_EOL;
        }
        echo "+ Consent request is sent." . PHP_EOL;
    }

    public function getCurrentCourses()
    {
        $this->checkLoginStatus();
        while (($stdPage = $this->curlHandler->get("https://registration.boun.edu.tr/scripts/student.asp")) === false) {
            echo "- Couldn't reach the student page, trying again." . PHP_EOL;
            $this->sleep();
        }
        echo "+ Student page is opened." . PHP_EOL;
        if (!preg_match_all('!<input[^>]*type="radio"[^>]*name="R1"[^>]*value="([^"]*)">[^<]*</td>.*?<a[^>]*href="#"[^>]*courseDesc[^>]*>([^<]*)</a>(.*?)</tr>!si', $stdPage, $courseData)) {
            echo "Student page is broken. (It can be a regex problem though) Trying again." . PHP_EOL;
            $this->getCurrentCourses();
            return;
        }
        for ($i = 0; $i < count($courseData[1]); ++$i) {
            preg_match("#.*<div[^>]*>([^<]*)<#si", $courseData[3][$i], $courseHours);
            $courseHours = $courseHours[1];
            $t = explode(".", $courseData[1][$i]);
            array_walk($t, function (&$v) {
                return $v = preg_replace("/\s/", null, $v);
            });
            $this->currCourses[$i] = [
                "name" => $t[0] . "." . $t[1],
                "description" => $courseData[2][$i],
                "credit" => $t[2],
                "hours" => $courseHours
            ];
        }
        return $this->currCourses;
    }

    public function displayCurrentCourses()
    {
        if (empty($this->currCourses)) {
            $this->getCurrentCourses();
            return;
        }
        echo "+ Here are your courses: " . PHP_EOL;
        foreach ($this->currCourses as $course) {
            echo $course["name"] . " - " . $course["description"] . " - " . $course["credit"] . " - " . $course["hours"] . PHP_EOL;
        }
    }

    public function __destruct()
    {
        @unlink($this->cookieFile);
    }
}