cx/lib/sessions.php

   1 <?php
   2
   3 cx_require('lib', 'db.php');
   4 cx_require('lib', 'setup.php');
   5
   6 function cx_sessions_create_session($user) {
   7         $uid = sha1(random_bytes(100));
   8         $update_time = $creation_time = time();
   9
  10         $sql = 'INSERT INTO sessions (
  11                 session_uid,
  12                 session_user_id,
  13                 session_creation_time,
  14                 session_update_time,
  15                 session_closed_time)
  16         VALUES (?, ?, ?, ?, ?);';
  17         cx_db_exec($sql, $uid, $user, $creation_time, $update_time, -1);
  18
  19         return $uid;
  20 }
  21
  22 function cx_sessions_close_session($uid) {
  23         $close_time = time();
  24
  25         $sql = 'UPDATE sessions
  26                 SET session_closed_time = ?
  27                 WHERE session_uid == ?;';
  28                 //LIMIT 1;';
  29
  30         cx_db_exec($sql, $close_time, $uid);
  31 }
  32
  33 function cx_sessions_active_session_user($uid, $lifetime) {
  34         $sql = 'SELECT
  35                 session_user_id
  36                 FROM sessions
  37                 WHERE session_uid == ?
  38                 AND session_update_time >= ?
  39                 AND session_closed_time == -1
  40                 LIMIT 1;';
  41
  42         $update_time = time() - $lifetime;
  43
  44         foreach (cx_db_query($sql, $uid, $update_time) as $session) {
  45                 return $session['session_user_id'];
  46         }
  47
  48         return null;
  49 }
  50
  51 cx_setup_register(1, function() {
  52         cx_db_exec('CREATE TABLE sessions (
  53                 session_id INTEGER PRIMARY KEY,
  54                 session_uid STRING,
  55                 session_user_id INTEGER,
  56                 session_creation_time INTEGER,
  57                 session_update_time INTEGER,
  58                 session_closed_time INTEGER,
  59
  60                 FOREIGN KEY(session_user_id) REFERENCES users(user_id))');
  61 });
  62
  63