<?php
// Make sure to place connectdb.php in outer directory during production
include('connectdb.php');

function fetchdropped() {
	// echo '<br>';

	$db = connectdb();

	$username = $_SESSION['username'];
	$courses_arr = array();

	$query = <<<EOF
select user_id from students where username='$username';
EOF;

	$userid = pg_query($db, $query);
	if(!$userid) {
		echo 'userid fetch for ' . $username . ' failed.<br>';
	} else {
		$userid = pg_fetch_row($userid)[0];
		// echo 'userid: ' . $userid . '<br>';
		$query = <<<EOF
select course_id from dropped_courses where user_id=$userid;
EOF;
		$course_ids = pg_query($db, $query);
		if(!$course_ids) {
			echo pg_last_error($db);
		}
		while ($row1 = pg_fetch_row($course_ids)) {
			$courseid = $row1[0];
			// echo 'courseid: ' . $courseid . ', ';
			$query = <<<EOF
select course_name from courses where course_id=$courseid;
EOF;
			$res = pg_query($db, $query);
			if (!$res) {
				echo pg_last_error($db);
			}
			$coursename = pg_fetch_row($res)[0];
			// echo 'coursename: ' . $coursename. '<br>';
			array_push($courses_arr, $coursename);
		}
	}
	// print_r($courses_arr);
	// echo 'Success';
	return $courses_arr;
}

function credits($coursename) {
	$db = connectdb();

	$query = <<<EOF
select course_credits from courses where course_name='$coursename';
EOF;

	$res = pg_query($db, $query);

	if (!$res) {
		echo pg_last_error($db);
	}
	$creds = pg_fetch_row($res)[0];

	return $creds;
}

?>