grandprix/lib.php at master · bdaloukas/grandprix · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
<?php

function connectdb()
{
    global $CFG;

    mysql_connect( $CFG->dbhost, $CFG->dbuser, $CFG->dbpass);
    mysql_select_db( $CFG->dbname);
    mysql_query("set names utf8");
}

  function GetHeader( $title)
  {
    $s = "";
    $s .= "<HTML> <head>";
  	$s .= "<title>$title</title>";
	  $s .= '<meta http-equiv="Content-Type" content="text/html; charset=utf-8">';
    $s .= "</head>\n";

    return $s;
  }

      function require_login( $filephp)
    {
        global $userid, $gameid;

        if( !array_key_exists( 'userid', $_SESSION))
        {
            ShowFormLogin( $filephp);
            die;
        }
        $userid = $_SESSION[ 'userid'];
		$gameid = $_SESSION[ 'gameid'];
    }

function ShowFormLogin( $filephp, $msg='')
{
    echo GetHeader( 'Είσοδος');

    if( $msg != '')
        echo '<br><b>'.$msg.'<br><br>';

    echo '<table cellpadding=0 border=0>';
    echo '<form name="MainForm" method="post" action="'.$filephp.'">';

    echo '<tr><td>Όνομα χρήστη:</td>';
    echo '<td><input name="username" id="username" type="text" id="username"> ';
    echo '</td></tr>';

    echo '<tr><td>Κωδικός:</td>';
    echo '<td><input name="password" type="password" id="password"> ';
    echo '</td></tr>';
    echo '<tr><td></td><td><center><br><input type="submit" value="Είσοδος"></td>';
    echo '</table>';
    echo '</form>';
?>
	<script type="text/JavaScript">

		document.forms['MainForm'].elements['username'].focus();
	</script>
<?php
}

  function GetParamPost( $name, $default='')
  {
    if( array_key_exists( $name, $_POST))
        return $_POST[ $name];
    else
        return '';
  }

  function OnLogin2( $filephp)
  {
    global $CFG, $userid, $gameid;

    $username = $_POST[ 'username'];

    echo GetHeader( '');

    $username = $_POST[ 'username'];
    $password = $_POST[ 'password'];

    $query = "SELECT * FROM {$CFG->prefix}users WHERE username='$username'";
    $result = mysql_query($query);
    $row = mysql_fetch_array($result);

    if( $row == false)
    {
        ShowFormLogin( $filephp, '<b>Λάθος όνομα χρήστη</b>');
        die;
    }

    if( $row[ 'password'] != '')
    {
        if( md5( $password) != $row[ 'password'])
        {
            ShowFormLogin( $filephp, '<b>Λάθος κωδικός</b>');
            die;
        }
    }

    $ip = GetMyIP();
    $hostname = gethostname();
    $userid = $row['id'];
	$gameid = $row['gameid'];
    $query = "INSERT INTO {$CFG->prefix}logins(userid,hostname,ip) SELECT $userid, '$hostname','$ip'";
    mysql_query($query);

    $query = "UPDATE {$CFG->prefix}users SET lastip='$ip' WHERE id=$userid";
    mysql_query($query);

    $_SESSION[ 'userid'] = $userid;
    $_SESSION[ 'gameid'] = $gameid;
  }

  function GetMyIP()
  {
    if( array_key_exists( "HTTP_X_FORWARDED_FOR", $_SERVER))
      return $_SERVER[ "HTTP_X_FORWARDED_FOR"];
    else
      return $_SERVER['REMOTE_ADDR'];
  }

function ComputeTimerStudent( &$resttime, &$question, &$questiontext, &$md5, &$infoanswer)
{
	global $CFG, $gameid;

	$userid = $_SESSION[ 'userid'];

	$sql = "SELECT * FROM {$CFG->prefix}game WHERE id=$gameid";
	$result = mysql_query( $sql) or die("MySQL Query Error: ".mysql_error().' '.$sql);
	$game = mysql_fetch_assoc( $result);
	$gameid = $game[ 'id'];
	$resttime = $game[ 'timefinish'] - time();

	if( $resttime < 0)
    	$resttime = 0;

	$question = $game[ 'question'];
	$questiontext = $game[ 'questiontext'];
	$md5 = $game[ 'md5questiontext'];

	$sql = "SELECT * FROM {$CFG->prefix}users WHERE id=$userid";
	$result = mysql_query( $sql) or die("MySQL Query Error: ".mysql_error().' '.$sql);
	$user = mysql_fetch_assoc( $result);
	if( $user == false)
    	die( $sql);

	$ip = GetMyIP();
	if( $user[ 'lastip'] != $ip)
    	die( 'Λάθος IP: '.$ip.' user='.$user[ 'username']);

	$sql = "SELECT * FROM {$CFG->prefix}hits WHERE question=$question AND todelete=0 AND userid=$userid";
	$result = mysql_query( $sql) or die("MySQL Query Error: ".mysql_error().' '.$sql);
	$rec = mysql_fetch_assoc( $result);
	$infoanswer = '';
	if( $rec == false)
    	$infoanswer = '<b>'.$user[ 'name'].'</b>: Δεν δώσατε ακόμη καμία απάντηση';
	else
	{
    	$answer = $rec[ 'answer'];
    	$infoanswer = '<b>'.$user[ 'name'].'</b>: Σαν απάντηση δώσατε: <b>'.$answer.'</b>';
		if( $rec[ 'graded'])
		{
			if( $rec[ 'grade'] == 1)
				$s = '1 βαθμός';
			else
				$s = $rec[ 'grade'].' βαθμοί';
			$infoanswer .= ' Απαντήσατε σωστά ('.$s.')';
		}
	}
}