php/utils.php

<?php
	require_once('db.php');

	function nomcurs($curs) {
		$codi = (int)$curs - 1;
		$codiany = intdiv($codi, 3);
		$coditorn = $codi % 3;

		$any = "";
		switch ($codiany) {
			case 0:
				$any = "2018 o abans";
				break;
			case 1:
				$any = "2019";
				break;
			case 2:
				$any = "2020";
				break;
			case 3:
				$any = "2021";
				break;
			case 4:
				$any = "2022";
				break;
			default:
				$any = "?";
		}

		$torn = "";
		switch ($coditorn) {
			case 0:
				$torn = "Matins";
				break;
			case 1:
				$torn = "Mixt";
				break;
			case 2:
				$torn = "Tardes";
				break;
			default:
				$torn = "?";
		}

		return "$any - $torn";
	}

	function nomgrau($grau) {
		switch ($grau) {
			case 1:
				return "Física";
			case 2:
				return "Química";
			case 3:
				return "Electrònica";
			case 4:
				return "Materials";
			case 5:
				return "Màster astrofísica i partícules";
			case 6:
				return "Màster fotònica";
			default:
				return "?";
		}
	}

	class User{
		public $id;
		public $nomcomplet;
		public $curs;
		public $grau;
		public $quimata;

		public function nom() {
			$noms = explode(" ", $this->nomcomplet);
			return $noms[0];
		}

		public function nomcurs() {
			return nomcurs($this->curs);
		}

		public function nomgrau() {
			return nomgrau($this->grau);
		}

		public function pista() {
			return $this->nomgrau()." - ".$this->nomcurs();
		}
	}

	function query($query) {
		global $conn;

		// Execute query and save result
		$result = $conn->query($query);

		// Return result of query
		return $result;
	}

	function get_users($id = 0, $getAsObjects = true) {
		$users = [];

		$credentials = new Credentials();
		$usersdb = $credentials->usersdb();
		$mortsdb = $credentials->mortsdb();

		// Prepare the query
		$query = "SELECT * FROM $usersdb";
		if ($id > 0) $query .= " WHERE id=".(int)$id;

		// Fetch the information of the user
		if ($result = query($query)) {
			while ($row = $result->fetch_row()) {
				if ($getAsObjects) {
					$user = new User();
					$user->id = (int)$row[0];
					$user->nomcomplet = $row[1];
					$user->curs = (int)$row[2];
					$user->grau = (int)$row[3];
					$user->quimata = (int)$row[4];
					$user->requested = (int)$row[5];
					$user->mort = (int)$row[6];
					$user->md5password = $row[7];
					$user->bits = $row[8];
				} else {
					$user = [];
					$user["id"] = (int)$row[0];
					$user["nomcomplet"] = $row[1];
					$user["curs"] = (int)$row[2];
					$user["grau"] = (int)$row[3];
					$user["quimata"] = (int)$row[4];
					$user["requested"] = (int)$row[5];
					$user["mort"] = (int)$row[6];
					$user["md5password"] = $row[7];
					$user["bits"] = $row[8];
					$user["pista"] = nomgrau($row[3])." - ".nomcurs($row[2]);
				}

				array_push($users, $user);
			}
			$result->close();
		} else {
			die("Query failed: " . $query);
		}

		if ($id > 0) return $users[0];
		else return $users;
	}

	// Number n to XXXXXXXXX with X = {0,1} binary format
	function dec2bits($code) {
		$bits = decbin($code);
		while (strlen($bits) < 9) $bits = '0' . $bits;
		return $bits;
	}
?>