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# Axis--User.php

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    00001 <?PHP
    00002
    00003 #
    00004 #   Axis--User.php
    00005 #   An Object for Handling User Information
    00006 #
    00007 #   Copyright 1999-2001 Axis Data
    00008 #   This code is free software that can be used or redistributed under the
    00009 #   terms of Version 2 of the GNU General Public License, as published by the
    00010 #   Free Software Foundation (http://www.fsf.org).
    00011 #
    00012 #   Author:  Edward Almasy (almasy@axisdata.com)
    00013 #
    00014 #   Part of the AxisPHP library v1.2.4
    00015 #   For more information see http://www.axisdata.com/AxisPHP/
    00016 #
    00017
    00018 # status values (error codes)
    00019 define("U_OKAY",                0);
    00020 define("U_ERROR",               1);
    00021 define("U_BADPASSWORD",         2);
    00022 define("U_NOSUCHUSER",          3);
    00023 define("U_PASSWORDSDONTMATCH",  4);
    00024 define("U_EMAILSDONTMATCH",     5);
    00025 define("U_DUPLICATEUSERNAME",   6);
    00026 define("U_ILLEGALUSERNAME",     7);
    00027 define("U_EMPTYUSERNAME",       8);
    00028 define("U_ILLEGALPASSWORD",     9);
    00029 define("U_ILLEGALPASSWORDAGAIN",10);
    00030 define("U_EMPTYPASSWORD",       11);
    00031 define("U_EMPTYPASSWORDAGAIN",  12);
    00032 define("U_ILLEGALEMAIL",        13);
    00033 define("U_ILLEGALEMAILAGAIN",   14);
    00034 define("U_EMPTYEMAIL",          15);
    00035 define("U_EMPTYEMAILAGAIN",     16);
    00036 define("U_NOTLOGGEDIN",         17);
    00037 define("U_MAILINGERROR",        18);
    00038 define("U_TEMPLATENOTFOUND",    19);
    00039 define("U_DUPLICATEEMAIL",      20);
    00040
    00041
    00042 class User {
    00043
    00044     # ---- PUBLIC INTERFACE --------------------------------------------------
    00045
    00046     function User(&$SessionOrDb, $UserInfo=NULL)
    00047     {
    00048         # assume constructor will succeed and user is not logged in
    00049         $this->Result = U_OKAY;
    00050         $this->LoggedIn = FALSE;
    00051
    00052         # if a session was passed in
    00053         if (is_object($SessionOrDb) && method_exists($SessionOrDb, "Session"))
    00054         {
    00055             # save pointer to session
    00056             $this->Session =& $SessionOrDb;
    00057
    00058             # swipe database handle from session
    00059             $this->DB =& $this->Session->DB;
    00060
    00061             # if user ID is available from session
    00062             if ($this->Session->Get("APUserId") !== NULL)
    00063             {
    00064                 # save user ID
    00065                 $this->UserId = $this->Session->Get("APUserId");
    00066
    00067                 # set flag indicating user is currently logged in
    00068                 $this->LoggedIn = TRUE;
    00069             }
    00070         }
    00071         # else if database handle was passed in
    00072         elseif (is_object($SessionOrDb)
    00073                 && method_exists($SessionOrDb, "Database"))
    00074         {
    00075             # save database handle
    00076             $this->DB =& $SessionOrDb;
    00077
    00078             # if user ID was passed in
    00079             if (is_int($UserInfo))
    00080             {
    00081                 # save user ID
    00082                 $this->UserId = $UserInfo;
    00083             }
    00084             # else if user name was passed in
    00085             elseif (is_string($UserInfo))
    00086             {
    00087                 # look up user ID in database
    00088                 $this->DB->Query("SELECT UserId FROM APUsers"
    00089                         ." WHERE UserName='".addslashes($UserInfo)."'");
    00090
    00091                 # if user ID was found
    00092                 if ($this->DB->NumRowsSelected() > 0)
    00093                 {
    00094                     $this->UserId = $this->DB->FetchField("UserId");
    00095                 }
    00096                 else
    00097                 {
    00098                     # if name looks like it could actually be a user ID
    00099                     if (preg_match("/^[-]*[0-9]+$/", $UserInfo))
    00100                     {
    00101                         # assume name was user ID
    00102                         $this->UserId = $UserInfo;
    00103                     }
    00104                     else
    00105                     {
    00106                         # set code indicating no user found
    00107                         $this->Result = U_NOSUCHUSER;
    00108                     }
    00109                 }
    00110             }
    00111         }
    00112         else
    00113         {
    00114             # error out
    00115             $this->Result = U_ERROR;
    00116             exit("ERROR: User object creation attempted without DB or session");
    00117         }
    00118     }
    00119
    00120     function Status()
    00121     {
    00122         return $this->Result;
    00123     }
    00124
    00125     # return text message corresponding to current (or specified) status code
    00126     function StatusMessage($StatusCode = NULL)
    00127     {
    00128         $APUserStatusMessages = array(
    00129                 U_OKAY                => "The operation was successful.",
    00130                 U_ERROR               => "There has been an error.",
    00131                 U_BADPASSWORD         => "The password you entered was"
    00132                                             ." incorrect.",
    00133                 U_NOSUCHUSER          => "No such user name was found.",
    00134                 U_PASSWORDSDONTMATCH  => "The new passwords you entered do"
    00135                                             ." not match.",
    00136                 U_EMAILSDONTMATCH     => "The e-mail addresses you entered"
    00137                                             ." do not match.",
    00138                 U_DUPLICATEUSERNAME   => "The user name you requested is"
    00139                                             ." already in use.",
    00140                 U_ILLEGALUSERNAME     => "The user name you requested is too"
    00141                                             ." short, too long, or contains"
    00142                                             ." illegal characters.",
    00143                 U_ILLEGALPASSWORD     => "The new password you requested is"
    00144                                             ." too short, too long, or"
    00145                                             ." contains illegal characters.",
    00146                 U_ILLEGALEMAIL        => "The e-mail address you entered"
    00147                                             ." appears to be invalid.",
    00148                 U_NOTLOGGEDIN         => "The user is not logged in.",
    00149                 U_MAILINGERROR        => "An error occurred while attempting"
    00150                                             ." to send e-mail.  Please notify"
    00151                                             ." the system administrator.",
    00152                 U_TEMPLATENOTFOUND    => "An error occurred while attempting"
    00153                                             ." to generate e-mail.  Please"
    00154                                             ." notify the system administrator.",
    00155                 U_DUPLICATEEMAIL      => "The e-mail address you supplied already"
    00156                                             ." has an account associated with it.",
    00157                 );
    00158
    00159         return ($StatusCode === NULL) ? $APUserStatusMessages[$this->Result]
    00160                 : $APUserStatusMessages[$StatusCode];
    00161     }
    00162
    00163     function Delete()
    00164     {
    00165         # clear priv list values
    00166         $this->DB->Query("DELETE FROM APUserPrivileges WHERE UserId = '".$this->UserId."'");
    00167
    00168         # delete user record from database
    00169         $this->DB->Query("DELETE FROM APUsers WHERE UserId = '".$this->UserId."'");
    00170
    00171         # report to caller that everything succeeded
    00172         $this->Result = U_OKAY;
    00173         return $this->Result;
    00174     }
    00175
    00176
    00177     # ---- Getting/Setting Values --------------------------------------------
    00178
    00179     function Id()
    00180     {
    00181         return $this->UserId;
    00182     }
    00183     function Name()
    00184     {
    00185         return $this->Get("UserName");
    00186     }
    00187     function LastLocation($NewLocation = NULL)
    00188     {
    00189         if ($NewLocation)
    00190         {
    00191             $this->DB->Query("UPDATE APUsers SET"
    00192                     ." LastLocation = '".addslashes($NewLocation)."',"
    00193                     ." LastActiveDate = NOW(),"
    00194                     ." LastIPAddress = '".$_SERVER["REMOTE_ADDR"]."'"
    00195                     ." WHERE UserId = '".addslashes($this->UserId)."'");
    00196             if (isset($this->DBFields))
    00197             {
    00198                 $this->DBFields["LastLocation"] = $NewLocation;
    00199                 $this->DBFields["LastActiveDate"] = date("Y-m-d H:i:s");
    00200             }
    00201         }
    00202         return $this->Get("LastLocation");
    00203     }
    00204     function LastActiveDate()
    00205     {
    00206         return $this->Get("LastActiveDate");
    00207     }
    00208     function LastIPAddress()
    00209     {
    00210         return $this->Get("LastIPAddress");
    00211     }
    00212
    00213     # get value from specified field
    00214     function Get($FieldName)
    00215     {
    00216         return $this->UpdateValue($FieldName);
    00217     }
    00218
    00219     # get value (formatted as a date) from specified field
    00220     function GetDate($FieldName, $Format = "")
    00221     {
    00222         # retrieve specified value from database
    00223         if (strlen($Format) > 0)
    00224         {
    00225             $this->DB->Query("SELECT DATE_FORMAT(`".addslashes($FieldName)."`, '".addslashes($Format)."') AS `".addslashes($FieldName)."` FROM APUsers WHERE UserId='".$this->UserId."'");
    00226         }
    00227         else
    00228         {
    00229             $this->DB->Query("SELECT `".addslashes($FieldName)."` FROM APUsers WHERE UserId='".$this->UserId."'");
    00230         }
    00231         $Record = $this->DB->FetchRow();
    00232
    00233         # return value to caller
    00234         return $Record[$FieldName];
    00235     }
    00236
    00237     # set value in specified field
    00238     function Set($FieldName, $NewValue)
    00239     {
    00240         $this->UpdateValue($FieldName, $NewValue);
    00241         $this->Result = U_OKAY;
    00242         return $this->Result;
    00243     }
    00244
    00245
    00246     # ---- Login Functions ---------------------------------------------------
    00247
    00248     function Login($UserName, $Password, $IgnorePassword = FALSE)
    00249     {
    00250         global $APUserId;
    00251
    00252         # error out if we are not part of a session
    00253         if (!isset($this->Session))
    00254         {
    00255             exit("ERROR: User->Login() called on object without session");
    00256         }
    00257
    00258         # if user not found in DB
    00259         $this->DB->Query("SELECT * FROM APUsers"
    00260                 ." WHERE UserName = '"
    00261                         .addslashes($this->NormalizeUserName($UserName))."'");
    00262         if ($this->DB->NumRowsSelected() < 1)
    00263         {
    00264             # result is no user by that name
    00265             $this->Result = U_NOSUCHUSER;
    00266         }
    00267         else
    00268         {
    00269             # grab password from DB
    00270             $Record = $this->DB->FetchRow();
    00271             $StoredPassword = $Record["UserPassword"];
    00272
    00273             if (isset($Password[0]) && $Password[0] == " ")
    00274             {
    00275                 $Challenge = md5(date("Ymd").$_SERVER["REMOTE_ADDR"]);
    00276                 $StoredPassword = md5( $Challenge . $StoredPassword );
    00277
    00278                 $EncryptedPassword = trim($Password);
    00279             }
    00280             else
    00281             {
    00282                 # if supplied password matches encrypted password
    00283                 $EncryptedPassword = crypt($Password, $StoredPassword);
    00284             }
    00285
    00286             if (($EncryptedPassword == $StoredPassword) || $IgnorePassword)
    00287             {
    00288                 # result is success
    00289                 $this->Result = U_OKAY;
    00290
    00291                 # store user ID for session
    00292                 $this->UserId = $Record["UserId"];
    00293                 $APUserId = $this->UserId;
    00294                 $this->Session->RegisterVariable("APUserId");
    00295
    00296                 # update last login date
    00297                 $this->DB->Query("UPDATE APUsers SET LastLoginDate = NOW() "
    00298                         ."WHERE UserId = '".$this->UserId."'");
    00299
    00300                 # Check for old format hashes, and rehash if possible
    00301                 if ($EncryptedPassword === $StoredPassword &&
    00302                     substr($StoredPassword,0,3) !== "$1$" &&
    00303                     $Password[0] !== " " &&
    00304                     CRYPT_MD5 )
    00305                 {
    00306                     $NewPassword = crypt($Password);
    00307                     $this->DB->Query(
    00308                         "UPDATE APUsers SET UserPassword='".addslashes($NewPassword)."' "
    00309                         ."WHERE UserId='".$this->UserId."'");
    00310                 }
    00311
    00312                 # set flag to indicate we are logged in
    00313                 $this->LoggedIn = TRUE;
    00314             }
    00315             else
    00316             {
    00317                 # result is bad password
    00318                 $this->Result = U_BADPASSWORD;
    00319             }
    00320         }
    00321
    00322         # return result to caller
    00323         return $this->Result;
    00324     }
    00325
    00326     # log this user out
    00327     function Logout()
    00328     {
    00329         # if we are part of a session
    00330         if (isset($this->Session))
    00331         {
    00332             # clear user ID for session
    00333             $this->Session->UnregisterVariable("APUserId");
    00334         }
    00335
    00336         # set flag to indicate user is no longer logged in
    00337         $this->LoggedIn = FALSE;
    00338     }
    00339
    00340     function GetPasswordSalt($UserName)
    00341     {
    00342         $this->DB->Query(
    00343             "SELECT * FROM APUsers WHERE UserName = '"
    00344             .addslashes($this->NormalizeUserName($UserName))."'");
    00345
    00346         if ($this->DB->NumRowsSelected() < 1)
    00347         {
    00348             # result is no user by that name, generate a fake salt
    00349             # to discourage user enumeration. Make it be an old-format
    00350             # crypt() salt so that it's harder.
    00351             $SaltString = $_SERVER["SERVER_ADDR"].$UserName;
    00352             $Result = substr(base64_encode(md5($SaltString)),0,2);
    00353         }
    00354         else
    00355         {
    00356             # grab password from DB
    00357             # Assumes that we used php's crypt() for the passowrd
    00358             # management stuff, and will need to be changed if we
    00359             # go to something else.
    00360             $Record = $this->DB->FetchRow();
    00361             $StoredPassword = $Record["UserPassword"];
    00362
    00363             if (substr($StoredPassword,0,3)==="$1$")
    00364             {
    00365                 $Result = substr($StoredPassword, 0,12);
    00366             }
    00367             else
    00368             {
    00369                 $Result = substr($StoredPassword, 0,2);
    00370             }
    00371         }
    00372
    00373         return $Result;
    00374     }
    00375
    00376     # report whether this user is or is not currently logged in
    00377     function IsLoggedIn() {  return $this->LoggedIn;  }
    00378     function IsNotLoggedIn() {  return !$this->LoggedIn;  }
    00379
    00380
    00381     # ---- Password Functions ------------------------------------------------
    00382
    00383     # set new password (with checks against old password)
    00384     function ChangePassword($OldPassword, $NewPassword, $NewPasswordAgain)
    00385     {
    00386         # if we are part of a session make sure a user is logged in
    00387         if (isset($this->Session) && ($this->IsLoggedIn() == FALSE))
    00388         {
    00389             $this->Result = U_NOTLOGGEDIN;
    00390             return $this->Result;
    00391         }
    00392
    00393         # if old password is not correct
    00394         $StoredPassword = $this->DB->Query("SELECT UserPassword FROM APUsers"
    00395                 ." WHERE UserId='".$this->UserId."'", "UserPassword");
    00396         $EncryptedPassword = crypt($OldPassword, $StoredPassword);
    00397         if ($EncryptedPassword != $StoredPassword)
    00398         {
    00399             # set status to indicate error
    00400             $this->Result = U_BADPASSWORD;
    00401         }
    00402         # else if new password is not legal
    00403         elseif (!$this->IsValidPassword($NewPassword))
    00404         {
    00405             # set status to indicate error
    00406             $this->Result = U_ILLEGALPASSWORD;
    00407         }
    00408         # else if both instances of new password do not match
    00409         elseif ($this->NormalizePassword($NewPassword)
    00410                 != $this->NormalizePassword($NewPasswordAgain))
    00411         {
    00412             # set status to indicate error
    00413             $this->Result = U_PASSWORDSDONTMATCH;
    00414         }
    00415         else
    00416         {
    00417             # set new password
    00418             $this->SetPassword($NewPassword);
    00419
    00420             # set status to indicate password successfully changed
    00421             $this->Result = U_OKAY;
    00422         }
    00423
    00424         # report to caller that everything succeeded
    00425         return $this->Result;
    00426     }
    00427
    00428     # set new password
    00429     function SetPassword($NewPassword)
    00430     {
    00431         # generate encrypted password
    00432         $EncryptedPassword = crypt($this->NormalizePassword($NewPassword));
    00433
    00434         # save encrypted password
    00435         $this->UpdateValue("UserPassword", $EncryptedPassword);
    00436     }
    00437
    00438     function CreateNewUserWithEMailedPassword(
    00439             $UserName, $EMail, $EMailAgain,
    00440             $TemplateFile = "Axis--User--EMailTemplate.txt")
    00441     {
    00442         return CreateNewUserAndMailPasswordFromFile(
    00443                 $UserName, $EMail, $EMailAgain, $TemplateFile);
    00444     }
    00445
    00446     function CreateNewUserAndMailPasswordFromFile(
    00447             $UserName, $EMail, $EMailAgain,
    00448             $TemplateFile = "Axis--User--EMailTemplate.txt")
    00449     {
    00450         # load e-mail template from file (first line is subject)
    00451         $Template = file($TemplateFile, 1);
    00452         $EMailSubject = array_shift($Template);
    00453         $EMailBody = join("", $Template);
    00454
    00455         return CreateNewUserAndMailPassword(
    00456                 $UserName, $EMail, $EMailAgain, $EMailSubject, $EMailBody);
    00457     }
    00458
    00459     function CreateNewUserAndMailPassword(
    00460             $UserName, $EMail, $EMailAgain, $EMailSubject, $EMailBody)
    00461     {
    00462         # make sure e-mail addresses match
    00463         if ($EMail != $EMailAgain)
    00464         {
    00465             $this->Result = U_EMAILSDONTMATCH;
    00466             return $this->Result;
    00467         }
    00468
    00469         # make sure e-mail address looks valid
    00470         if ($this->IsValidLookingEMailAddress($EMail) == FALSE)
    00471         {
    00472             $this->Result = U_ILLEGALEMAIL;
    00473             return $this->Result;
    00474         }
    00475
    00476         # generate random password
    00477         $Password = $this->GetRandomPassword();
    00478
    00479         # attempt to create new user with password
    00480         $Result = $this->CreateNewUser($UserName, $Password, $Password);
    00481
    00482         # if user creation failed
    00483         if ($Result != U_OKAY)
    00484         {
    00485             # report error result to caller
    00486             return $Result;
    00487         }
    00488         # else
    00489         else
    00490         {
    00491             # set e-mail address in user record
    00492             $this->Set("EMail", $EMail);
    00493
    00494             # plug appropriate values into subject and body of e-mail message
    00495             $EMailSubject = str_replace("X-USERNAME-X", $UserName, $EMailSubject);
    00496             $EMailBody = str_replace("X-USERNAME-X", $UserName, $EMailBody);
    00497             $EMailBody = str_replace("X-PASSWORD-X", $Password, $EMailBody);
    00498
    00499             # send out e-mail message with new account info
    00500             $Result = mail($EMail, $EMailSubject, $EMailBody,
    00501                 "Auto-Submitted: auto-generated");
    00502
    00503             # if mailing attempt failed
    00504             if ($Result != TRUE)
    00505             {
    00506                 # report error to caller
    00507                 $this->Result = U_MAILINGERROR;
    00508                 return $this->Result;
    00509             }
    00510             # else
    00511             else
    00512             {
    00513                 # report success to caller
    00514                 $this->Result = U_OKAY;
    00515                 return $this->Result;
    00516             }
    00517         }
    00518     }
    00519
    00520     # get code for user to submit to confirm registration
    00521     function GetActivationCode()
    00522     {
    00523         # code is MD5 sum based on user name and encrypted password
    00524         $ActivationCodeLength = 6;
    00525         return $this->GetUniqueCode("Activation", $ActivationCodeLength);
    00526     }
    00527
    00528     # check whether confirmation code is valid
    00529     function IsActivationCodeGood($Code)
    00530     {
    00531         return (strtoupper(trim($Code)) == $this->GetActivationCode())
    00532                 ? TRUE : FALSE;
    00533     }
    00534
    00535     # get/set whether user registration has been confirmed
    00536     function IsActivated($NewValue = DB_NOVALUE)
    00537     {
    00538         return $this->UpdateValue("RegistrationConfirmed", $NewValue);
    00539     }
    00540
    00541     # get code for user to submit to confirm password reset
    00542     function GetResetCode()
    00543     {
    00544         # code is MD5 sum based on user name and encrypted password
    00545         $ResetCodeLength = 10;
    00546         return $this->GetUniqueCode("Reset", $ResetCodeLength);
    00547     }
    00548
    00549     # check whether password reset code is valid
    00550     function IsResetCodeGood($Code)
    00551     {
    00552         return (strtoupper(trim($Code)) == $this->GetResetCode())
    00553                 ? TRUE : FALSE;
    00554     }
    00555
    00556     # get code for user to submit to confirm mail change request
    00557     function GetMailChangeCode()
    00558     {
    00559       $ResetCodeLength = 10;
    00560
    00561       return $this->GetUniqueCode("MailChange".$this->Get("EMail").$this->Get("NewEMail"),
    00562                                   $ResetCodeLength);
    00563     }
    00564
    00565     function IsMailChangeCodeGood($Code)
    00566     {
    00567       return (strtoupper(trim($Code)) == $this->GetMailChangeCode())
    00568         ? TRUE : FALSE;
    00569     }
    00570
    00571     # send e-mail to user (returns TRUE on success)
    00572     function SendEMail(
    00573                   $TemplateTextOrFileName, $FromAddress = NULL, $MoreSubstitutions = NULL,
    00574                   $ToAddress = NULL)
    00575     {
    00576         # if template is file name
    00577         if (@is_file($TemplateTextOrFileName))
    00578         {
    00579             # load in template from file
    00580             $Template = file($TemplateTextOrFileName, 1);
    00581
    00582             # report error to caller if template load failed
    00583             if ($Template == FALSE)
    00584             {
    00585                 $this->Status = U_TEMPLATENOTFOUND;
    00586                 return $this->Status;
    00587             }
    00588
    00589             # join into one text block
    00590             $TemplateTextOrFileName = join("", $Template);
    00591         }
    00592
    00593         # split template into lines
    00594         $Template = explode("\n", $TemplateTextOrFileName);
    00595
    00596         # strip any comments out of template
    00597         $FilteredTemplate = array();
    00598         foreach ($Template as $Line)
    00599         {
    00600             if (!preg_match("/^[\\s]*#/", $Line))
    00601             {
    00602                 $FilteredTemplate[] = $Line;
    00603             }
    00604         }
    00605
    00606         # split subject line out of template (first non-comment line in file)
    00607         $EMailSubject = array_shift($FilteredTemplate);
    00608         $EMailBody = join("\n", $FilteredTemplate);
    00609
    00610         # set up our substitutions
    00611         $Substitutions = array(
    00612                 "X-USERNAME-X" => $this->Get("UserName"),
    00613                 "X-EMAILADDRESS-X" =>  $this->Get("EMail"),
    00614                 "X-ACTIVATIONCODE-X" => $this->GetActivationCode(),
    00615                 "X-RESETCODE-X" => $this->GetResetCode(),
    00616                 "X-CHANGECODE-X" => $this->GetMailChangeCode(),
    00617                 "X-IPADDRESS-X" => @$_SERVER["REMOTE_ADDR"],
    00618                 );
    00619
    00620         # if caller provided additional substitutions
    00621         if (is_array($MoreSubstitutions))
    00622         {
    00623             # add in entries from caller to substitution list
    00624             $Substitutions = array_merge(
    00625                     $Substitutions, $MoreSubstitutions);
    00626         }
    00627
    00628         # perform substitutions on subject and body of message
    00629         $EMailSubject = str_replace(array_keys($Substitutions),
    00630                 array_values($Substitutions), $EMailSubject);
    00631         $EMailBody = str_replace(array_keys($Substitutions),
    00632                 array_values($Substitutions), $EMailBody);
    00633
    00634         $AdditionalHeaders = "Auto-Submitted: auto-generated";
    00635
    00636         # if caller provided "From" address
    00637         if ($FromAddress)
    00638         {
    00639             # prepend "From" address onto message
    00640             $AdditionalHeaders .= "\r\nFrom: ".$FromAddress;
    00641         }
    00642
    00643         # send out mail message
    00644         $Result = mail(is_null($ToAddress)?$this->Get("EMail"):$ToAddress,
    00645                        $EMailSubject,
    00646                        $EMailBody, $AdditionalHeaders);
    00647
    00648         # report result of mailing attempt to caller
    00649         $this->Status = ($Result == TRUE) ? U_OKAY : U_MAILINGERROR;
    00650         return ($this->Status == U_OKAY);
    00651     }
    00652
    00653
    00654     # ---- Privilege Functions -----------------------------------------------
    00655
    00656     function HasPriv($Privilege, $Privilege2 = NULL, $Privilege3 = NULL,
    00657             $Privilege4 = NULL, $Privilege5 = NULL, $Privilege6 = NULL)
    00658     {
    00659         # make sure a user is logged in (no privileges if not logged in)
    00660         if ($this->IsLoggedIn() == FALSE) {  return FALSE;  }
    00661
    00662         # build database query to check privileges
    00663         $Query = "SELECT COUNT(*) AS PrivCount FROM APUserPrivileges "
    00664                         ."WHERE UserId='".$this->UserId."'"
    00665                             ." AND (Privilege='".$Privilege."'";
    00666         if ($Privilege2 != NULL)
    00667                 { $Query .= " OR Privilege='".$Privilege2."'";  }
    00668         if ($Privilege3 != NULL)
    00669                 {  $Query .= " OR Privilege='".$Privilege3."'";  }
    00670         if ($Privilege4 != NULL)
    00671                 {  $Query .= " OR Privilege='".$Privilege4."'";  }
    00672         if ($Privilege5 != NULL)
    00673                 {  $Query .= " OR Privilege='".$Privilege5."'";  }
    00674         if ($Privilege6 != NULL)
    00675                 {  $Query .= " OR Privilege='".$Privilege6."'";  }
    00676         $Query .= ")";
    00677
    00678         # look for privilege in database
    00679         $PrivCount = $this->DB->Query($Query, "PrivCount");
    00680
    00681         # return value to caller
    00682         return ($PrivCount > 0) ? TRUE : FALSE;
    00683     }
    00684
    00685     function GrantPriv($Privilege)
    00686     {
    00687         # if privilege value is invalid
    00688         if (intval($Privilege) != trim($Privilege))
    00689         {
    00690             # set code to indicate error
    00691             $this->Result = U_ERROR;
    00692         }
    00693         else
    00694         {
    00695             # if user does not already have privilege
    00696             $PrivCount = $this->DB->Query("SELECT COUNT(*) AS PrivCount"
    00697                     ." FROM APUserPrivileges"
    00698                     ." WHERE UserId='".$this->UserId."'"
    00699                     ." AND Privilege='".$Privilege."'",
    00700                     "PrivCount");
    00701             if ($PrivCount == 0)
    00702             {
    00703                 # add privilege for this user to database
    00704                 $this->DB->Query("INSERT INTO APUserPrivileges"
    00705                         ." (UserId, Privilege) VALUES"
    00706                         ." ('".$this->UserId."', ".$Privilege.")");
    00707             }
    00708
    00709             # set code to indicate success
    00710             $this->Result = U_OKAY;
    00711         }
    00712
    00713         # report result to caller
    00714         return $this->Result;
    00715     }
    00716
    00717     function RevokePriv($Privilege)
    00718     {
    00719         # remove privilege from database (if present)
    00720         $this->DB->Query("DELETE FROM APUserPrivileges"
    00721                          ." WHERE UserId = '".$this->UserId."'"
    00722                          ." AND Privilege = '".$Privilege."'");
    00723
    00724         # report success to caller
    00725         $this->Result = U_OKAY;
    00726         return $this->Result;
    00727     }
    00728
    00729     function GetPrivList()
    00730     {
    00731         # read privileges from database and return array to caller
    00732         $this->DB->Query("SELECT Privilege FROM APUserPrivileges"
    00733                 ." WHERE UserId='".$this->UserId."'");
    00734         return $this->DB->FetchColumn("Privilege");
    00735     }
    00736
    00737     function SetPrivList($NewPrivileges)
    00738     {
    00739         # clear old priv list values
    00740         $this->DB->Query("DELETE FROM APUserPrivileges"
    00741                 ." WHERE UserId='".$this->UserId."'");
    00742
    00743         # for each priv value passed in
    00744         foreach ($NewPrivileges as $Privilege)
    00745         {
    00746             # set priv for user
    00747             $this->GrantPriv($Privilege);
    00748         }
    00749     }
    00750
    00751
    00752     # ---- Miscellaneous Functions -------------------------------------------
    00753
    00754     # get unique alphanumeric code for user
    00755     function GetUniqueCode($SeedString, $CodeLength)
    00756     {
    00757         return substr(strtoupper(md5(
    00758                 $this->Get("UserName").$this->Get("UserPassword").$SeedString)),
    00759                 0, $CodeLength);
    00760     }
    00761
    00762
    00763     # ---- PRIVATE INTERFACE -------------------------------------------------
    00764
    00765     var $DB;        # handle to SQL database we use to store user information
    00766     var $Session;   # session to use in storing persistent information
    00767     var $UserId;    # user ID number for reference into database
    00768     var $Result;    # result of last operation
    00769     var $LoggedIn;  # flag indicating whether user is logged in
    00770     var $DBFields;  # used for caching user values
    00771
    00772     # check whether a user name is valid  (alphanumeric string of 2-24 chars)
    00773     function IsValidUserName($UserName)
    00774     {
    00775         if (preg_match("/^[a-zA-Z0-9]{2,24}$/", $UserName)) {  return TRUE;  } else {  return FALSE;  }
    00776     }
    00777
    00778     # check whether a password is valid  (at least 6 characters)
    00779     function IsValidPassword($Password)
    00780     {
    00781         if (strlen(User::NormalizePassword($Password)) < 6)
    00782                 {  return FALSE;  } else {  return TRUE;  }
    00783     }
    00784
    00785     # check whether an e-mail address looks valid
    00786     function IsValidLookingEMailAddress($EMail)
    00787     {
    00788         if (preg_match("/^[a-zA-Z0-9._\-]+@[a-zA-Z0-9._\-]+\.[a-zA-Z]{2,3}$/", $EMail)) {  return TRUE;  } else {  return FALSE;  }
    00789     }
    00790
    00791     # get normalized version of e-mail address
    00792     # (may be called statically)
    00793     function NormalizeEMailAddress($EMailAddress)
    00794     {
    00795         return strtolower(trim($EMailAddress));
    00796     }
    00797
    00798     # get normalized version of user name
    00799     # (may be called statically)
    00800     function NormalizeUserName($UserName)
    00801     {
    00802         return trim($UserName);
    00803     }
    00804
    00805     # get normalized version of password
    00806     # (may be called statically)
    00807     function NormalizePassword($Password)
    00808     {
    00809         return trim($Password);
    00810     }
    00811
    00812     # generate random password
    00813     # generate random password
    00814     function GetRandomPassword($PasswordMinLength = 6, $PasswordMaxLength = 8)
    00815     {
    00816         # seed random number generator
    00817         mt_srand((double)microtime() * 1000000);
    00818
    00819         # generate password of requested length
    00820         return sprintf("%06d", mt_rand(pow(10, ($PasswordMinLength - 1)),
    00821                 (pow(10, $PasswordMaxLength) - 1)));
    00822     }
    00823
    00824     # convenience function to supply parameters to Database->UpdateValue()
    00825     function UpdateValue($FieldName, $NewValue = DB_NOVALUE)
    00826     {
    00827         return $this->DB->UpdateValue("APUsers", $FieldName, $NewValue,
    00828                 "UserId = '".$this->UserId."'", $this->DBFields);
    00829     }
    00830
    00831     # methods for backward compatibility with earlier versions of User
    00832     function GivePriv($Privilege) {  $this->GrantPriv($Privilege);  }
    00833 };
    00834
    00835
    00836 ?>