application/models/users_model.php

   1 <?php
   2
   3 /**
   4  * Class Users_model models user information from DB
   5  *
   6  * @category    Model
   7  * @author              calinburloiu
   8  *
   9  */
  10 class Users_model extends CI_Model {
  11         public $db = NULL;
  12
  13         public function __construct()
  14         {
  15                 parent::__construct();
  16
  17                 if ($this->db === NULL)
  18                 {
  19                         $this->load->library('singleton_db');
  20                         $this->db = $this->singleton_db->connect();
  21                 }
  22         }
  23
  24         /**
  25          * Check authentication credentials. $username can be username or e-mail.
  26          *
  27          * @param string $username
  28          * @param string $password
  29          * @return mixed can return FALSE if authentication failed, a `users`DB row
  30          * as an associative array if authentication was successful
  31          */
  32         public function login($username, $password)
  33         {
  34                 $this->load->helper('email');
  35
  36                 // User logs with e-mail address.
  37                 if (! valid_email($username))
  38                         $cond_user = "username = '$username'";
  39                 else
  40                         $cond_user = "email = '$username'";
  41
  42                 $enc_password = sha1($password);
  43
  44                 $query = $this->db->query("SELECT u.*, a.activation_code
  45                         FROM `users` u LEFT JOIN `users_unactivated` a ON (u.id = a.user_id)
  46                         WHERE $cond_user
  47                                 AND (auth_src = 'ldap' OR password = '$enc_password')");
  48
  49                 // It is possible that the user has a LDAP account but he's
  50                 // authenticating here for the first time so it does not have an entry
  51                 // in `users` table.
  52                 if ($query->num_rows() === 0)
  53                 {
  54                         $ldap_userdata = $this->ldap_login($username, $password);
  55                         if ($ldap_userdata === FALSE)
  56                                 return FALSE;
  57                         $userdata = $this->convert_ldap_userdata($ldap_userdata);
  58                         $this->register($userdata);
  59
  60                         $user = $this->login($username, $password);
  61                         $user['import'] = TRUE;
  62                         return $user;
  63                 }
  64
  65                 $user = $query->row_array();
  66
  67                 // Authenticate with LDAP.
  68                 if ($user['auth_src'] == 'ldap'
  69                                 && ! $this->ldap_login($username, $password))
  70                         return FALSE;
  71
  72                 if (empty($user['username']) || empty($user['email'])
  73                                 || empty($user['first_name']) || empty($user['last_name'])
  74                                 || empty($user['country']))
  75                         $user['import'] = TRUE;
  76
  77                 // Update last login time.
  78                 $this->db->query("UPDATE `users`
  79                         SET last_login = UTC_TIMESTAMP()
  80                         WHERE username = '$username'");
  81
  82                 // If we are here internal authentication has successful.
  83                 return $user;
  84         }
  85
  86         /**
  87          * Begin the OpenID login by redirecting user to the OP to authenticate.
  88          *
  89          * @param string $openid
  90          */
  91         public function openid_begin_login($openid)
  92         {
  93                 $this->lang->load('openid');
  94                 $this->load->library('openid');
  95
  96                 $request_to = site_url('user/check_openid_login');
  97
  98                 $req = array('nickname');
  99                 $opt = array('fullname', 'email', 'dob', 'country');
 100                 $policy = site_url('user/openid_policy');
 101
 102                 $ax_attributes[] = Auth_OpenID_AX_AttrInfo::make(
 103                                 'http://axschema.org/contact/email', 1, TRUE);
 104                 $ax_attributes[] = Auth_OpenID_AX_AttrInfo::make(
 105                                 'http://axschema.org/namePerson/first', 1, TRUE);
 106                 $ax_attributes[] = Auth_OpenID_AX_AttrInfo::make(
 107                                 'http://axschema.org/namePerson/last', 1, TRUE);
 108                 $ax_attributes[] = Auth_OpenID_AX_AttrInfo::make(
 109                                 'http://axschema.org/contact/country', 1, TRUE);
 110
 111                 $this->openid->set_request_to($request_to);
 112                 $this->openid->set_trust_root(base_url());
 113                 $this->openid->set_sreg(TRUE, $req, $opt, $policy);
 114                 $this->openid->set_ax(TRUE, $ax_attributes);
 115
 116                 // Redirection to OP site will follow.
 117                 $this->openid->authenticate($openid);
 118         }
 119
 120         /**
 121          * Finalize the OpenID login. Register user if is here for the first time.
 122          *
 123          * @return mixed returns a `users` DB row as an associative array if
 124          * authentication was successful or Auth_OpenID_CANCEL/_FAILURE if it was
 125          * unsuccessful.
 126          */
 127         public function openid_complete_login()
 128         {
 129                 $this->lang->load('openid');
 130                 $this->load->library('openid');
 131
 132                 $request_to = site_url('user/check_openid_login');
 133                 $this->openid->set_request_to($request_to);
 134
 135                 $response = $this->openid->get_response();
 136
 137                 if ($response->status === Auth_OpenID_CANCEL
 138                                 || $response->status === Auth_OpenID_FAILURE)
 139                         return $response->status;
 140
 141                 // Auth_OpenID_SUCCESS
 142                 $openid = $response->getDisplayIdentifier();
 143                 //$esc_openid = htmlspecialchars($openid, ENT_QUOTES);
 144
 145                 // Get user_id to see if it's the first time the user logs in with
 146                 // OpenID.
 147                 $query = $this->db->query("SELECT * from `users_openid`
 148                         WHERE openid_url = '$openid'");
 149                 $import = FALSE;
 150
 151                 // First time with OpenID => register user
 152                 if ($query->num_rows() === 0)
 153                 {
 154                         $user_id = $this->openid_register($response);
 155                         $import = TRUE;
 156                 }
 157                 // Not first time with OpenID.
 158                 else
 159                         $user_id = $query->row()->user_id;
 160
 161                 // Login
 162                 $query = $this->db->query("SELECT * FROM `users`
 163                         WHERE id = $user_id");
 164                 $userdata = $query->row_array();
 165                 $userdata['import'] = $import;
 166
 167                 if (empty($userdata['username']) || empty($userdata['email'])
 168                                 || empty($userdata['first_name'])
 169                                 || empty($userdata['last_name'])
 170                                 || empty($userdata['country']))
 171                         $userdata['import'] = TRUE;
 172
 173                 // Update last login time.
 174                 $this->db->query("UPDATE `users`
 175                         SET last_login = UTC_TIMESTAMP()
 176                         WHERE id = $user_id");
 177
 178                 return $userdata;
 179         }
 180
 181         /**
 182          * Register an user that logged in with OpenID for the first time.
 183          *
 184          * @param object $op_response object returned by Janrain
 185          * Consumer::complete method.
 186          * @return mixed the user_id inserted or FALSE on error
 187          */
 188         public function openid_register($op_response)
 189         {
 190                 $sreg_resp = Auth_OpenID_SRegResponse::fromSuccessResponse($op_response);
 191                 $ax_resp = Auth_OpenID_AX_FetchResponse::fromSuccessResponse($op_response);
 192
 193                 // E-mail
 194                 $email = $ax_resp->get('http://axschema.org/contact/email');
 195                 if (empty($email) || is_a($email, 'Auth_OpenID_AX_Error'))
 196                         $data['email'] = $sreg_resp->get('email', '');
 197                 else
 198                         $data['email'] = $email[0];
 199
 200                 // First Name
 201                 $first_name = $ax_resp->get('http://axschema.org/namePerson/first');
 202                 if (empty($first_name) || is_a($first_name, 'Auth_OpenID_AX_Error'))
 203                         $data['first_name'] = '';
 204                 else
 205                         $data['first_name'] = $first_name[0];
 206
 207                 // Sur Name
 208                 $last_name = $ax_resp->get('http://axschema.org/namePerson/last');
 209                 if (empty($last_name) || is_a($last_name, 'Auth_OpenID_AX_Error'))
 210                         $data['last_name'] = '';
 211                 else
 212                         $data['last_name'] = $last_name[0];
 213
 214                 // First Name and Last Name
 215                 if (empty($data['first_name']) || empty($data['last_name']))
 216                 {
 217                         $fullname = $sreg_resp->get('fullname');
 218
 219                         if ($fullname)
 220                         {
 221                                 if (empty($data['first_name']))
 222                                         $data['first_name'] = substr(
 223                                                         $fullname, 0, strrpos($fullname, ' '));
 224                                 if (empty($data['last_name']))
 225                                         $data['last_name'] = substr(
 226                                                         $fullname, strrpos($fullname, ' ') + 1);
 227                         }
 228                 }
 229
 230                 // Username
 231                 $data['username'] = $sreg_resp->get('nickname');
 232                 if (!$data['username'])
 233                 {
 234                         if (!empty($data['email']))
 235                         {
 236                                 $data['email'] = strtolower($data['email']);
 237                                 $data['username'] = substr($data['email'],
 238                                                 0, strpos($data['email'], '@'));
 239                                 $data['username'] = preg_replace(array('/[^a-z0-9\._]*/'),
 240                                                 array(''), $data['username']);
 241                         }
 242                         else if(!empty($data['first_name']) || !empty($data['last_name']))
 243                         {
 244                                 $data['username'] = $data['first_name'] . '_'
 245                                                 . $data['last_name'];
 246                                 $data['username'] = substr($data['username'], 0, 32);
 247                         }
 248                         else
 249                                 $data['username'] = $this->gen_username();
 250                 }
 251                 if ($this->get_userdata($data['username']))
 252                 {
 253                         $chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
 254                         $len_chars = strlen($chars);
 255                         $data['username'] .= '_';
 256                         do
 257                         {
 258                                 $data['username'] .= $chars[ mt_rand(0, $len_chars - 1) ];
 259                         } while($this->get_userdata($data['username']));
 260                 }
 261
 262                 // Country
 263                 $country = $ax_resp->get('http://axschema.org/contact/country');
 264                 if (empty($country) || is_a($country, 'Auth_OpenID_AX_Error'))
 265                         $data['country'] = $sreg_resp->get('country', '');
 266                 else
 267                         $data['country'] = $country[0];
 268
 269                 // Birth Date
 270                 $data['birth_date'] = $sreg_resp->get('dob', NULL);
 271
 272                 // OpenID
 273                 $data['auth_src'] = 'openid';
 274
 275 //              print_r($data);
 276
 277                 if (!$this->register($data, $op_response->getDisplayIdentifier()))
 278                         return FALSE;
 279
 280                 $query = $this->db->query("SELECT id from `users`
 281                         WHERE username = '{$data['username']}'");
 282                 return $query->row()->id;
 283         }
 284
 285         /**
 286          * Converts an array returned by LDAP login to an array which contains
 287          * user data ready to be used in `users` DB.
 288          *
 289          * @param array $ldap_userdata
 290          * @return array
 291          */
 292         public function convert_ldap_userdata($ldap_userdata)
 293         {
 294                 $userdata['username'] = $ldap_userdata['uid'][0];
 295                 $userdata['email'] = $ldap_userdata['mail'][0];
 296                 $userdata['first_name'] = $ldap_userdata['givenname'][0];
 297                 $userdata['last_name'] = $ldap_userdata['sn'][0];
 298
 299                 $userdata['auth_src'] = 'ldap';
 300
 301                 return $userdata;
 302         }
 303
 304         /**
 305         * Login with LDAP.
 306         *
 307         * @param string $username
 308         * @param string $password
 309         * @return boolean
 310         * @author  Alex Herișanu, Răzvan Deaconescu, Călin-Andrei Burloiu
 311         */
 312         public function ldap_login($username, $password)
 313         {
 314                 $this->config->load('ldap');
 315
 316                 // First connection: binding.
 317                 // TODO exception
 318                 $ds = ldap_connect($this->config->item('ldap_server')) or die("Can't connect to ldap server.\n");
 319                 if (!@ldap_bind($ds, $this->config->item('ldap_bind_user'),
 320                         $this->config->item('ldap_bind_password')))
 321                 {
 322                         ldap_close($ds);
 323                         die("Can't connect to ".$this->config->item('ldap_server')."\n");
 324                         return FALSE;
 325                 }
 326                 $sr = ldap_search($ds, "dc=cs,dc=curs,dc=pub,dc=ro", "(uid=" . $username . ")");
 327                 if (ldap_count_entries($ds, $sr) > 1)
 328                 die("Multiple entries with the same uid in LDAP database??");
 329                 if (ldap_count_entries($ds, $sr) < 1) {
 330                         ldap_close($ds);
 331                         return FALSE;
 332                 }
 333
 334                 $info = ldap_get_entries($ds, $sr);
 335                 $dn = $info[0]["dn"];
 336                 ldap_close($ds);
 337
 338                 // Second connection: connect with user's credentials.
 339                 $ds = ldap_connect($this->config->item('ldap_server')) or die("Can't connect to ldap server\n");
 340                 if (!@ldap_bind($ds, $dn, $password) or $password == '') {
 341                         ldap_close($ds);
 342                         return FALSE;
 343                 }
 344
 345                 // Verifify if DN belongs to the requested OU.
 346                 $info[0]['ou_ok'] = $this->ldap_dn_belongs_ou( $dn, $this->config->item('ldap_req_ou') );
 347
 348                 // Set authentication source.
 349                 $info[0]['auth_src'] = 'ldap_first_time';
 350
 351                 return $info[0];
 352         }
 353
 354         /**
 355         * Verify if a user belongs to a group.
 356         *
 357         * @param string $dn = "ou=Student,ou=People..."
 358         * @param array $ou = array ("Student", etc
 359         * @return TRUE or FALSE
 360         * @author  Răzvan Herișanu, Răzvan Deaconescu, Călin-Andrei Burloiu
 361         */
 362         public function ldap_dn_belongs_ou($dn, $ou)
 363         {
 364                 if (!is_array($ou))
 365                         $ou = array ($ou);
 366
 367                 $founded = FALSE;
 368                 $words = explode(',', $dn);
 369                 foreach ($words as $c) {
 370                         $parts = explode("=", $c);
 371                         $key = $parts[0];
 372                         $value = $parts[1];
 373
 374                         if (strtolower($key) == "ou" && in_array($value, $ou) )
 375                                 $founded = TRUE;
 376                 }
 377
 378                 return $founded;
 379         }
 380
 381         /**
 382          * Adds a new user to DB.
 383          * Do not add join_date and last_login column, they will be automatically
 384          * added.
 385          * Provide an 'openid' with the OpenID as value in order to register users
 386          * logging in this way.
 387          *
 388          * @param array $data   corresponds to DB columns
 389          */
 390         public function register($data, $openid = NULL)
 391         {
 392                 $this->load->helper('array');
 393
 394                 // TODO verify mandatory data existance
 395
 396                 // Process data.
 397                 if (isset($data['password']))
 398                         $data['password'] = sha1($data['password']);
 399
 400                 if (empty($data['birth_date']))
 401                         $data['birth_date'] = NULL;
 402
 403                 $cols = '';
 404                 $vals = '';
 405                 foreach ($data as $col=> $val)
 406                 {
 407                         if ($val === NULL)
 408                         {
 409                                 $cols .= "$col, ";
 410                                 $vals .= "NULL, ";
 411                                 continue;
 412                         }
 413
 414                         $cols .= "$col, ";
 415                         if (is_int($val))
 416                                 $vals .= "$val, ";
 417                         else if (is_string($val))
 418                                 $vals .= "'$val', ";
 419                 }
 420                 $cols = substr($cols, 0, -2);
 421                 $vals = substr($vals, 0, -2);
 422
 423                 $query = $this->db->query("INSERT INTO `users`
 424                         ($cols, registration_date, last_login)
 425                         VALUES ($vals, utc_timestamp(), utc_timestamp())");
 426                 if ($query === FALSE)
 427                         return FALSE;
 428
 429                 // If registered with OpenID insert a row in `users_openid`.
 430                 if ($openid)
 431                 {
 432                         // Find user_id.
 433                         $query = $this->db->query("SELECT id from `users`
 434                                 WHERE username = '{$data['username']}'");
 435                         if ($query->num_rows() === 0)
 436                                 return FALSE;
 437                         $user_id = $query->row()->id;
 438
 439                         // Insert row in `users_openid`.
 440                         $query = $this->db->query("INSERT INTO `users_openid`
 441                                 (openid_url, user_id)
 442                                 VALUES ('$openid', $user_id)");
 443                         if (!$query)
 444                                 return FALSE;
 445                 }
 446
 447                 // If registered with internal authentication it needs to activate
 448                 // the account.
 449                 if ($data['auth_src'] == 'internal')
 450                 {
 451                         $activation_code = Users_model::gen_activation_code($data['username']);
 452                         $user_id = $this->get_user_id($data['username']);
 453                         $query = $this->db->query("INSERT INTO `users_unactivated`
 454                                 (user_id, activation_code)
 455                                 VALUES ($user_id, '$activation_code')");
 456                         $this->send_activation_email($user_id, $data['email'],
 457                                 $activation_code, $data['username']);
 458                 }
 459
 460                 // TODO exception on failure
 461                 return $query;
 462         }
 463
 464         public function get_user_id($username)
 465         {
 466                 $query = $this->db->query("SELECT id FROM `users`
 467                         WHERE username = '$username'");
 468
 469                 if ($query->num_rows() === 0)
 470                         return FALSE;
 471
 472                 return $query->row()->id;
 473         }
 474
 475         // TODO cleanup account activation
 476         public function cleanup_account_activation()
 477         {
 478
 479         }
 480
 481         /**
 482          * Activated an account for an user having $user_id with $activation_code.
 483          *
 484          * @param int $user_id
 485          * @param string $activation_code       hexa 16 characters string
 486          * @return returns TRUE if activation was successful and FALSE otherwise
 487          */
 488         public function activate_account($user_id, $activation_code)
 489         {
 490                 $query = $this->db->query("SELECT * FROM `users_unactivated`
 491                         WHERE user_id = $user_id
 492                                 AND activation_code = '$activation_code'");
 493
 494                 if ($query->num_rows() === 0)
 495                         return FALSE;
 496
 497                 $this->db->query("DELETE FROM `users_unactivated`
 498                         WHERE user_id = $user_id");
 499
 500                 return TRUE;
 501         }
 502
 503         public function send_activation_email($user_id, $email = NULL,
 504                         $activation_code = NULL, $username = NULL)
 505         {
 506                 if (!$activation_code || !$email || !$username)
 507                 {
 508                         if (!$email)
 509                                 $cols = 'email, ';
 510                         else
 511                                 $cols = '';
 512
 513                         $userdata = $this->get_userdata($user_id,
 514                                         $cols. "a.activation_code, username");
 515                         $activation_code =& $userdata['activation_code'];
 516
 517                         if (!$email)
 518                                 $email =& $userdata['email'];
 519                         $username =& $userdata['username'];
 520                 }
 521
 522                 if ($activation_code === NULL)
 523                         return TRUE;
 524
 525                 $subject = '['. $this->config->item('site_name')
 526                                 . '] Account Activation';
 527                 $activation_url =
 528                                 site_url("user/activate/$user_id/code/$activation_code");
 529                 $msg = sprintf($this->lang->line('user_activation_email_content'),
 530                         $username, $this->config->item('site_name'), site_url(),
 531                         $activation_url, $activation_code);
 532                 $headers = "From: ". $this->config->item('noreply_email');
 533
 534                 return mail($email, $subject, $msg, $headers);
 535         }
 536
 537         public function recover_password($username, $email)
 538         {
 539                 $userdata = $this->get_userdata($username, 'email, username, id');
 540
 541                 if (strcmp($userdata['email'], $email) !== 0)
 542                         return FALSE;
 543
 544                 $recovered_password = Users_model::gen_password();
 545
 546                 $this->set_userdata(intval($userdata['id']), array('password'=>
 547                                 $recovered_password));
 548
 549                 $subject = '['. $this->config->item('site_name')
 550                 . '] Password Recovery';
 551                 $msg = sprintf($this->lang->line('user_password_recovery_email_content'),
 552                         $username, $this->config->item('site_name'), site_url(),
 553                         $recovered_password);
 554                 $headers = "From: ". $this->config->item('noreply_email');
 555
 556                 mail($email, $subject, $msg, $headers);
 557
 558                 return TRUE;
 559         }
 560
 561         /**
 562          * Returns data from `users` table. If $user is int it is used as an
 563          * id, if it is string it is used as an username.
 564          *
 565          * @param mixed $user
 566          * @param string $table_cols    (optional) string with comma separated
 567          * `users` table column names. Use a.activation_code to check user's
 568          * account activation_code. If this value is NULL than the account is
 569          * active.
 570          * @return array        associative array with userdata from DB
 571          */
 572         public function get_userdata($user, $table_cols = '*')
 573         {
 574                 if (is_int($user))
 575                         $cond = "id = $user";
 576                 else
 577                         $cond = "username = '$user'";
 578
 579                 $query = $this->db->query("SELECT $table_cols
 580                         FROM `users` u LEFT JOIN `users_unactivated` a
 581                                 ON (u.id = a.user_id)
 582                         WHERE $cond");
 583
 584                 if ($query->num_rows() === 0)
 585                         return FALSE;
 586
 587                 $userdata = $query->row_array();
 588
 589                 // Post process userdata.
 590                 if (isset($userdata['picture']))
 591                 {
 592                         $userdata['picture_thumb'] = site_url(
 593                                 "data/user_pictures/{$userdata['picture']}-thumb.jpg");
 594                         $userdata['picture'] = site_url(
 595                                 "data/user_pictures/{$userdata['picture']}");
 596                 }
 597
 598                 return $userdata;
 599         }
 600
 601         /**
 602          * Modifies data from `users` table for user with $user_id.
 603          *
 604          * @param int $user_id
 605          * @param array $data   key-value pairs with columns and new values to be
 606          * modified
 607          * @return boolean      returns TRUE on success and FALSE otherwise
 608          */
 609         public function set_userdata($user_id, $data)
 610         {
 611                 // TODO verify mandatory data existance
 612
 613                 // Process data.
 614                 if (isset($data['password']))
 615                         $data['password'] = sha1($data['password']);
 616                 // TODO picture data: save, convert, make it thumbnail
 617
 618                 if (empty($data['birth_date']))
 619                         $data['birth_date'] = NULL;
 620
 621                 $set = '';
 622                 foreach ($data as $col => $val)
 623                 {
 624                         if ($val === NULL)
 625                         {
 626                                 $set .= "$col = NULL, ";
 627                                 continue;
 628                         }
 629
 630                         if (is_int($val))
 631                                 $set .= "$col = $val, ";
 632                         else if (is_string($val))
 633                                 $set .= "$col = '$val', ";
 634                 }
 635                 $set = substr($set, 0, -2);
 636
 637                 $query_str = "UPDATE `users`
 638                         SET $set WHERE id = $user_id";
 639                 //echo "<p>$query_str</p>";
 640                 $query = $this->db->query($query_str);
 641
 642                 // TODO exception
 643                 return $query;
 644         }
 645
 646         public static function gen_activation_code($str = '')
 647         {
 648                 $ci =& get_instance();
 649
 650                 $activation_code = substr(
 651                         sha1(''. $str. $ci->config->item('encryption_key')
 652                                 . mt_rand()),
 653                         0,
 654                         16);
 655
 656                 return $activation_code;
 657         }
 658
 659         public static function gen_password()
 660         {
 661                 $ci =& get_instance();
 662                 $length = 16;
 663                 $chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ,.?!_-';
 664                 $len_chars = strlen($chars);
 665                 $enc_key = $ci->config->item('encryption_key');
 666                 $len_enc_key = strlen($enc_key);
 667                 $password = '';
 668
 669                 for ($p = 0; $p < $length; $p++)
 670                 {
 671                         $i = (mt_rand(1, 100) * ord($enc_key[ mt_rand(0, $len_enc_key-1) ]))
 672                                 % $len_chars;
 673                         $password .= $chars[$i];
 674                 }
 675
 676                 return $password;
 677         }
 678
 679         public static function gen_username()
 680         {
 681                 $chars = 'abcdefghijklmnopqrstuvwxyz0123456789._';
 682                 $len_chars = strlen($chars);
 683                 $len = 8;
 684                 $username = '';
 685
 686                 for ($i = 0; $i < $len; $i++)
 687                         $username .= $chars[ mt_rand(0, $len_chars - 1) ];
 688
 689                 return $username;
 690         }
 691
 692         public static function roles_to_string($roles)
 693         {
 694                 $ci =& get_instance();
 695                 $ci->lang->load('user');
 696
 697                 if ($roles == USER_ROLE_STANDARD)
 698                         return $ci->lang->line('user_role_standard');
 699                 else
 700                 {
 701                         $str_roles = '';
 702
 703                         if ($roles & USER_ROLE_ADMIN)
 704                                 $str_roles .= $ci->lang->line('user_role_admin') . '; ';
 705                 }
 706
 707                 return $str_roles;
 708         }
 709 }
 710
 711 /* End of file users_model.php */
 712 /* Location: ./application/models/users_model.php */