sw/webdir/index.php

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//$Header: /home/dashley/cvsrep/e3ft_gpl01/e3ft_gpl01/webprojs/fboprime/sw/webdir/index.php,v 1.37 2006/11/04 21:09:14 dashley Exp $
//-------------------------------------------------------------------------------------------------
//Copyright 2006 David T. Ashley
//-------------------------------------------------------------------------------------------------
//This source code and any program in which it is compiled/used is provided under the GNU GENERAL
//PUBLIC LICENSE, Version 3, full license text below.
//-------------------------------------------------------------------------------------------------
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//OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
//THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
//PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
//IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
//ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
//
//  16. Limitation of Liability.
//
//  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
//WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
//THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
//GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
//USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
//DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
//PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
//EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
//SUCH DAMAGES.
//
//  17. Interpretation of Sections 15 and 16.
//
//  If the disclaimer of warranty and limitation of liability provided
//above cannot be given local legal effect according to their terms,
//reviewing courts shall apply local law that most closely approximates
//an absolute waiver of all civil liability in connection with the
//Program, unless a warranty or assumption of liability accompanies a
//copy of the Program in return for a fee.
//
//                     END OF TERMS AND CONDITIONS
//
//            How to Apply These Terms to Your New Programs
//
//  If you develop a new program, and you want it to be of the greatest
//possible use to the public, the best way to achieve this is to make it
//free software which everyone can redistribute and change under these terms.
//
//  To do so, attach the following notices to the program.  It is safest
//to attach them to the start of each source file to most effectively
//state the exclusion of warranty; and each file should have at least
//the "copyright" line and a pointer to where the full notice is found.
//
//    <one line to give the program's name and a brief idea of what it does.>
//    Copyright (C) <year>  <name of author>
//
//    This program is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    This program is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
//Also add information on how to contact you by electronic and paper mail.
//
//  If the program does terminal interaction, make it output a short
//notice like this when it starts in an interactive mode:
//
//    <program>  Copyright (C) <year>  <name of author>
//    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
//    This is free software, and you are welcome to redistribute it
//    under certain conditions; type `show c' for details.
//
//The hypothetical commands `show w' and `show c' should show the appropriate
//parts of the General Public License.  Of course, your program's commands
//might be different; for a GUI interface, you would use an "about box".
//
//  You should also get your employer (if you work as a programmer) or school,
//if any, to sign a "copyright disclaimer" for the program, if necessary.
//For more information on this, and how to apply and follow the GNU GPL, see
//<http://www.gnu.org/licenses/>.
//
//  The GNU General Public License does not permit incorporating your program
//into proprietary programs.  If your program is a subroutine library, you
//may consider it more useful to permit linking proprietary applications with
//the library.  If this is what you want to do, use the GNU Lesser General
//Public License instead of this License.  But first, please read
//<http://www.gnu.org/philosophy/why-not-lgpl.html>.
//-------------------------------------------------------------------------------------------------
//----------------------------------------------------------------------------------------------------
//Prevent browser or proxy caching.
//
header("Cache-Control: no-cache, must-revalidate");
header("Pragma: no-cache");
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
//----------------------------------------------------------------------------------------------------
//The include path (set in the PHP config file) has to be overridden.  This allows many users of
//the same server to each have their own PHP library, located just about anywhere the server has
//permissions to read.
set_include_path("/var/www/php_library/fboprime");
//
//----------------------------------------------------------------------------------------------------
//Include the necessary PHP include (a.k.a. "PHP library") files.
require_once("config.inc");
require_once("db.inc");         //Make sure shutdown function available.
require_once("dt8.inc");
require_once("global.inc");
require_once("htmlformat.inc");
require_once("log.inc");
require_once("par.inc");
require_once("resv.inc");
require_once("rscs.inc");
require_once("schedview.inc");
require_once("sess.inc");
require_once("stdformat.inc");
require_once("t4.inc");
require_once("tod.inc");
//
//
require_once("devel.inc");
//----------------------------------------------------------------------------------------------------
function display_pwchange_redirect(
                                  $curuserinfo_in,
                                  $cursessioninfo_in,
                                  $sddt_year_int_in,  $sddt_month_int_in,  $sddt_day_int_in,
                                  $sdtim_hour_int_in, $sdtim_minute_int_in
                                  )
   {
   $redirect_time = 20; //Time until redirection.

   //Reconstruct the strings to be used in GET/POST parameters.
   $sddt_in  = DT8_make_from_ints($sddt_year_int_in, $sddt_month_int_in, $sddt_day_int_in);
   $sdtim_in = sprintf("%02d", $sdtim_hour_int_in) . sprintf("%02d", $sdtim_minute_int_in);
 
   //Get the URL get string to be appended to the base URL as a function of the date and time.
   //This operation is so common that there is a function for it.
   $url_get_trailer = STRFUNC_datetime_get_url_trailer($sddt_in, $sdtim_in);

   //Do da page.
   HTMLFORMAT_echo_push_nl("<html>");
      HTMLFORMAT_echo_push_nl("<head>");
         HTMLFORMAT_echo_noop_nl("<title>FBO-Prime Redirection to Password Change</title>");
         HTMLFORMAT_echo_noop_nl(
                                "<meta http-equiv=\"Refresh\" content=\"" 
                                . 
                                (string)$redirect_time 
                                .
                                "; URL=userpwchange.php"
                                .
                                $url_get_trailer
                                .
                                "\">"
                                );
      HTMLFORMAT_echo_pull_nl("</head>");
      HTMLFORMAT_echo_push_nl("<body>");
         HTMLFORMAT_echo_push_nl("<table width=\"100%\" border=\"1\" cellspacing=\"0\" cellpadding=\"4\" rules=\"none\">");
            HTMLFORMAT_echo_push_nl("<tr>");
               HTMLFORMAT_echo_push_nl("<td align=\"center\">");
                  HTMLFORMAT_echo_noop_nl("<p><br><br><b>Password Change Recommended Due to Use of Temporary Password</b></p>");
                  HTMLFORMAT_echo_noop_nl("<p>You've logged in with a temporary password.&nbsp; Please change your password to");
                  HTMLFORMAT_echo_noop_nl("a value that you will remember.</p>");
                  HTMLFORMAT_echo_noop_nl("<p>You will be redirected to the password change page in " . (string)$redirect_time . " seconds.&nbsp;");
                  HTMLFORMAT_echo_noop_nl("On the password change page, please use your temporary password as your current password.</p>");
                  HTMLFORMAT_echo_noop_nl("<p>If you are not automatically redirected, click ");
                  HTMLFORMAT_echo_noop_nl("<a href=\"userpwchange.php" . $url_get_trailer . 
                                          "\">here</a> to go to the password change page.<br><br><br></p>");
               HTMLFORMAT_echo_pull_nl("</td>");
            HTMLFORMAT_echo_pull_nl("</tr>");
         HTMLFORMAT_echo_pull_nl("</table>");
         STDFORMAT_stdfooter_tabular($curuserinfo_in, $sddt_in, $sdtim_in);
      HTMLFORMAT_echo_pull_nl("</body>");
   HTMLFORMAT_echo_pull_nl("</html>"); 
   }
//
//----------------------------------------------------------------------------------------------------
//Display the dayview page for a given date and time.
//
//Parameters:
//   userinfo             :  The array of user information for the logged in user (pulled from the MySQL
//                           database), or FALSE if no user is logged in.
//
//   sessioninfo          :  The array of session information for the logged in user (pulled from the
//                           MySQL database), or FALSE if no user is logged in.
//
//   dateyear             :  The year of the date to display (an integer).
//
//   datemonth            :  The month of the date to display (an integer).
//
//   dateday              :  The day of the date to display (an integer).
//
//   timehour             :  The hour of the time to display (an integer).
//
//   timemin              :  The minute of the time to display (an integer).
//
//   diff_time_perm_array :  An array of permissions about previous and future times
//                           specifying which should be displayed.
//   pwauthfailure        :  TRUE if a userid was supplied but the password didn't match.
//                           This means login was attempted but didn't work.
//
function display_dayview_page($userinfo,
                              $sessioninfo,
                              $dateyear, $datemonth, $dateday,
                              $timehour, $timemin,
                              $diff_time_perm_array,
                              $panel,
                              $pwauthfailure
                              )
   {
   global $GLOBAL_stime_year;
   global $GLOBAL_stime_month;
   global $GLOBAL_stime_day;

   HTMLFORMAT_echo_push_nl("<html>");
      HTMLFORMAT_echo_push_nl("<head>");
         HTMLFORMAT_echo_noop_nl("<title>" . CONFIG_FBO_NAME_LONG . " Daily Flight Schedule ("
                                 .
                                 DATEFUNC_stdlongdate_w_dow($dateyear, $datemonth, $dateday)
                                 .
                                 ")</title>");
      HTMLFORMAT_echo_pull_nl("</head>");
      HTMLFORMAT_echo_push_nl("<body link=\"#" 
                              . CONFIG_GLOBAL_COLOR_UVLINK 
                              . "\" vlink=\"#"
                              . CONFIG_GLOBAL_COLOR_VLINK
                              . "\" alink=\"#"
                              . CONFIG_GLOBAL_COLOR_ALINK
                              . "\">");
         HTMLFORMAT_echo_push_nl("<table border=\"1\" cellspacing=\"0\" cellpadding=\"4\">");
            HTMLFORMAT_echo_push_nl("<tr>");

               if ($userinfo === FALSE)
                  {
                  HTMLFORMAT_echo_push_nl("<td bgcolor=\"#" . CONFIG_SCHED_COLOR_BACKGROUND . "\">");
                     SCHEDVIEW_login_form_echo(
                                              $userinfo, 
                                              DT8_make_from_ints($dateyear, $datemonth, $dateday),
                                              sprintf("%02d", $timehour) . sprintf("%02d", $timemin),
                                              $pwauthfailure
                                              );   //Emit the login form. 
                  HTMLFORMAT_echo_pull_nl("</td>");
                  }

               HTMLFORMAT_echo_push_nl("<td bgcolor=\"#" . CONFIG_SCHED_COLOR_BACKGROUND . "\">");
                  SCHEDVIEW_dayview_page_navigation_bar(
                                                          $userinfo, 
                                                          $sessioninfo,
                                                          DT8_make_from_ints($dateyear, $datemonth, $dateday),
                                                          sprintf("%02d", $timehour) . sprintf("%02d", $timemin) 
                                                       ); //Page navigation choices.
               HTMLFORMAT_echo_pull_nl("</td>");

   //If we are not at the lower limit for what can be viewed, display the
   //previous month's calendar.
   //
   if ($diff_time_perm_array[0])
      {
      DATEFUNC_offset_month($dateyear, $datemonth, -1, $prev_month_year, $prev_month_month, $prev_month_result_code);

      HTMLFORMAT_echo_push_nl("<td bgcolor=\"#" . CONFIG_SCHED_COLOR_BACKGROUND . "\">");
      SCHEDVIEW_dayview_calendar($prev_month_year, $prev_month_month,
                                 $dateyear, $datemonth, $dateday);
      HTMLFORMAT_echo_pull_nl("</td>");
      }

   //Display the current month.  This is definitely displayable (this was checked before
   //this function was called).
   HTMLFORMAT_echo_push_nl("<td bgcolor=\"#" . CONFIG_SCHED_COLOR_BACKGROUND . "\">");
      SCHEDVIEW_dayview_calendar($dateyear, $datemonth,
                                 $dateyear, $datemonth, $dateday);
   HTMLFORMAT_echo_pull_nl("</td>");

   //If we are not at the upper limit for what can be viewed, display the
   //previous month's calendar.
   //
   if ($diff_time_perm_array[7])
      {
      DATEFUNC_offset_month($dateyear, $datemonth, 1, $next_month_year, $next_month_month, $next_month_result_code);

      HTMLFORMAT_echo_push_nl("<td bgcolor=\"#" . CONFIG_SCHED_COLOR_BACKGROUND . "\">");
      SCHEDVIEW_dayview_calendar($next_month_year, $next_month_month,
                                 $dateyear, $datemonth, $dateday);
      HTMLFORMAT_echo_pull_nl("</td>");
      }


            HTMLFORMAT_echo_pull_nl("</tr>");
         HTMLFORMAT_echo_pull_nl("</table>");
      SCHEDVIEW_scheduling_area($userinfo, $sessioninfo,
                                $dateyear, $datemonth, $dateday,
                                $timehour, $timemin,
                                $diff_time_perm_array,
                                $panel);
      STDFORMAT_stdfooter_tabular($userinfo, 
                                  DT8_make_from_ints($dateyear, $datemonth, $dateday), 
                                  sprintf("%02d%02d", $timehour, $timemin));
      HTMLFORMAT_echo_pull_nl("</body>");
   HTMLFORMAT_echo_pull_nl("</html>");
   }
//
//----------------------------------------------------------------------------------------------------
//----------------------------------------------------------------------------------------------------
//-----  M A I N    S C R I P T  ---------------------------------------------------------------------
//----------------------------------------------------------------------------------------------------
//----------------------------------------------------------------------------------------------------
//Set all of the global variables to initial values.  This action includes acquiring both Unix
//timestamps and a consistent locale timestamp.  The timestamp is acquired only once per page
//load for economy and guaranteed consistency.
//
GLOBAL_init();
//
//----------------------------------------------------------------------------------------------------
//Sanitize and copy in any GET/POST parameters and cookies that are used by this web page.
//The rest of them are simply ignored.
//
PAR_get_authuserid();                //User ID, if supplied.
PAR_get_authuserpasswd();            //Password, if supplied.
PAR_get_fbopsid();                   //Session identifier cookie.
PAR_get_logout();                    //Logout parameter.
PAR_get_sddt();                      //Scheduling date.
PAR_get_sdtim();                     //Scheduling time.
PAR_get_todaynow();                  //SDDT/SDTIM reset to current time if necessary.
PAR_get_menulvladjst();              //Menu detail level adjustment.
//
//----------------------------------------------------------------------------------------------------
//Start off believing there was not a password authentication failure.
//
$pwauthfailure   = FALSE;
//
//Start off believing that we are logging in with a permanent password and there is no need to
//change password.
$temppasswdlogin = FALSE;
//
//----------------------------------------------------------------------------------------------------
//Try to connect to the MySQL daemon.  If we can't connect, this is an exceptional circumstance
//and we have to display an error screen and abort.
//
$GLOBAL_dbhandle = mysql_connect(CONFIG_MYSQL_SERVER, CONFIG_MYSQL_USERNAME, CONFIG_MYSQL_PASSWORD);
if ($GLOBAL_dbhandle === FALSE)
   {
   //Write an error screen.
   STDFORMAT_dbstartuperrorpage();

   //Make a log entry to the system log.
   LOG_syslog("Failure to make MySQL connection in \"" . $_SERVER["PHP_SELF"] . "\".");
   
   //Gracefully terminate the script.
   exit(0);
   }
//
//----------------------------------------------------------------------------------------------------
//Attempt to connect to the correct database.  If there is an error, this is an
//exceptional circumstance and we have to display an error screen and abort.
//
if (mysql_select_db(CONFIG_MYSQL_DATABASE, $GLOBAL_dbhandle) === FALSE)
   {
   //Write an error screen.
   STDFORMAT_dbstartuperrorpage();

   //Make a log entry to the system log.
   LOG_syslog("Failure to select MySQL database in \"" . $_SERVER["PHP_SELF"] . "\".");
   
   //Gracefully terminate the script.
   exit(0);
   }
//
//----------------------------------------------------------------------------------------------------
//Make provisions for abnormal termination.  First, make sure that in the event of abnormal
//termination, a shutdown function that unlocks all database tables is called.  If this isn't done,
//if FBO-Prime is run on a system 
//
register_shutdown_function("DB_db_shutdown_func");
//
//Make sure that this script will always run to completion. even if the TCP connection is lost or
//a user clicks the STOP button on the browser.  There are more complex applications where one
//might want to allow an abort, but for this application where no query should take a lot of time,
//it is more conservative and safer to let every script run to completion.
//
ignore_user_abort(TRUE);  //The PHP documentation was apparently wrong.  An examination of the user
                          //comments and a search by function name on the web seems to indicate
                          //that calling this function with TRUE will disable user abort.  However,
                          //there is a margin for error in what users have said ... if there are
                          //ever any suspected locking or termination problems, the behavior of this
                          //function should be empirically confirmed.
//
//----------------------------------------------------------------------------------------------------
//Assume, by default, that no current user is logged in and that no current session is active.
//We may modify those assumptions later.
//
$curuserinfo    = FALSE;
$cursessioninfo = FALSE;
//
//----------------------------------------------------------------------------------------------------
//If the "logout" parameter is supplied, this means to log out the user, if any.
//
if ($PAR_logout)
   {
   //Destroy client side and server-side session state.
   SESS_logout($curuserinfo, $cursessioninfo);
   }
//
//If there was a userid supplied, try to authenticate that and the password.  Choose this path over
//even an existing good cookie.  It shouldn't be easy to supply a userid with an existing good
//cookie (the form shouldn't be displayed), but cover that case indirectly, anyway.
//
else if ($PAR_authuserid !== FALSE)
   {
   //Destroy any existing session information.
   //
   //Try to authenticate and open a new session.
   //
   //On success:
   //  Open a new session.
   //
   //On failure:
   //  Set a flag to give the option of e-mailed passwords.
   //
   SESS_userid_pwd_authenticate_open_session($PAR_authuserid, $PAR_authuserpasswd, $authrcode, $curuserinfo, $cursessioninfo);
   //
   if ($curuserinfo === FALSE)
      {
      //There was a user ID supplied, but yet no user was authenticated.  This is an authentication
      //failure.
      //
      $pwauthfailure = TRUE;
      }
   else
      {
      USRS_set_mostrecentlogin($curuserinfo, SubStr($GLOBAL_stime_string, 2, 8));
      }
   //
   //If the return code indicates a temporary password was used, then set the temporary password
   //login flag so we display the password redirect page.
   //
   if ($authrcode == SESS_RCODE_SUCCESS_TEMP_PASSWORD)
      {
      $temppasswdlogin = TRUE;
      USRS_set_mostrecentlogin($curuserinfo,  SubStr($GLOBAL_stime_string, 2, 8));
      }
   }
//
//----------------------------------------------------------------------------------------------------
//If a session ID exists (it would have been passed in as a cookie or else the global variable
//would have been assigned if we made a login on this page load):
//   a)Authenticate the SID.
//   b)On success:
//        1)Update the session information.
//        2)Retrieve user and session information (this will be used throughout the page).
//   c)On failure:
//        1)Set variable(s) to indicate failure.
//----------------------------------------------------------------------------------------------------
else if ($PAR_fbopsid !== FALSE)
   {
   SESS_revalidate($curuserinfo, $cursessioninfo);
   }
//----------------------------------------------------------------------------------------------------
//Log the page hit, including the GET/POST parameters.
//
if ($PAR_sddt !== FALSE)
   $logpars = "sddt=" . $PAR_sddt;
else
   $logpars = "";

if ($PAR_sdtim !== FALSE)
   {
   if (strlen($logpars) > 0)
      $logpars .= (", ");
   $logpars .= ("sdtim=" . $PAR_sdtim);
   }

if ($PAR_logout !== FALSE)
   {
   if (strlen($logpars) > 0)
      $logpars .= (", ");
   $logpars .= ("logout");
   }

LOG_log(LOG_ET_PAGEHIT, 
        $GLOBAL_stime_string, 
        $GLOBAL_client_ip, 
        ($curuserinfo !== FALSE)    ? ($curuserinfo["userid"]) : (""), 
        ($cursessioninfo !== FALSE) ? ($cursessioninfo["sid"]) : (""),
        $_SERVER["PHP_SELF"],
        $logpars,
        __FILE__,
        __LINE__, 
        "Page hit.");
//
//----------------------------------------------------------------------------------------------------
//Condition the "$PAR_sdtim" parameter and get it into range as the variable $sdtim.  If it doesn't 
//exist or can't be made sense of, assign it to be the current time.
//
if (T4_is_valid($PAR_sdtim) && !$PAR_todaynow)
   {
   $sdtim = $PAR_sdtim;                                           //The input parameter is valid.  Use it.
   T4_extract_ints($sdtim, $sdtim_hour_int, $sdtim_minute_int);   //Extract hours and minutes.
   }
else if ((($cursessioninfo !== FALSE) && (T4_is_valid($cursessioninfo["sdtim"]))) && !$PAR_todaynow) 
   //User logged in and stored info valid.
   {
   $sdtim = $cursessioninfo["sdtim"];                             //Grab the saved value from the session.
   T4_extract_ints($sdtim, $sdtim_hour_int, $sdtim_minute_int);   //Extract hours and minutes.
   }
else
   {
   $sdtim = T4_now_pageload();                                    //It is invalid or missing.  Use the present time.
   T4_extract_ints($sdtim, $sdtim_hour_int, $sdtim_minute_int);   //Extract hours and minutes.
   }
//
//Calculate the panel that we are in with the time.
$panel = TOD_best_panel($sdtim_hour_int, $sdtim_minute_int, $CONFIG_SCHED_DAY_PANELS);
//
//----------------------------------------------------------------------------------------------------
//Condition the "sddt" parameter and get it into range.  If it doesn't exist or can't be made
//sense of, assign it to be today's date.
//
DT8_extract_components($PAR_sddt, $sddt_is_valid, $sddt_components);
if ($sddt_is_valid && !$PAR_todaynow)
   {
   //The DT8 passed in via GET/POST is valid.  Assign the integer dates based on that.
   $sddt           = $PAR_sddt;
   $sddt_year_int  = $sddt_components[0];
   $sddt_month_int = $sddt_components[1];
   $sddt_day_int   = $sddt_components[2];
   }
else
   {
   if (($cursessioninfo !== NULL) && (!$PAR_todaynow))  //User is logged in. 
      {
      DT8_extract_components($cursessioninfo["sddt"], $sddt_is_valid, $sddt_components);

      if ($sddt_is_valid)
         {
         //There is a user logged in, and the date from the session is fine.  Use that.
         $sddt           = $cursessioninfo["sddt"];
         $sddt_year_int  = $sddt_components[0];
         $sddt_month_int = $sddt_components[1];
         $sddt_day_int   = $sddt_components[2];
         }
      else
         {
         //There is a user logged in, but the sddt stored in the session record is bad.
         //Use today's date instead.
         $sddt = DT8_make_from_ints($GLOBAL_stime_year, $GLOBAL_stime_month, $GLOBAL_stime_day);
         $sddt_year_int  = $GLOBAL_stime_year;
         $sddt_month_int = $GLOBAL_stime_month;
         $sddt_day_int   = $GLOBAL_stime_day;
         }
      }
   else
      {
      //The DT8 passed in via GET/POST is not valid, and there is no user logged in so can't try
      //to use the date from session.  Use today's date.
      $sddt = DT8_make_from_ints($GLOBAL_stime_year, $GLOBAL_stime_month, $GLOBAL_stime_day);
      $sddt_year_int  = $GLOBAL_stime_year;
      $sddt_month_int = $GLOBAL_stime_month;
      $sddt_day_int   = $GLOBAL_stime_day;
      }
   }
//
//Clip the DT8 at the lower and upper bounds of what the calendaring functionality can
//support and what we are allowed to view.
$result = DATEFUNC_is_not_displayable($sddt_year_int, $sddt_month_int);
if ($result == -1)
   {
   //The date specified by the DT8 is too early.  We have to clip it to the first day
   //of the month that we can view.
   DATEFUNC_offset_month($GLOBAL_stime_year,
                         $GLOBAL_stime_month,
                         -CONFIG_SCHED_SCHEDACC_PREV_MO,
                         $year_clipped,
                         $month_clipped,
                         $trash_result_flag);
   $sddt_year_int  = $year_clipped;
   $sddt_month_int = $month_clipped;
   $sddt_day_int   = 1;
   $sddt = DT8_make_from_ints($sddt_year_int, $sddt_month_int, $sddt_day_int);
   }
else if ($result == 1)
   {
   //The date specified by the DT8 is too late.  We have to clip it to the last
   //day of the month that we can view.
   DATEFUNC_offset_month($GLOBAL_stime_year,
                         $GLOBAL_stime_month,
                         CONFIG_SCHED_SCHEDACC_FUTU_MO,
                         $year_clipped,
                         $month_clipped,
                         $trash_result_flag);
   $sddt_year_int  = $year_clipped;
   $sddt_month_int = $month_clipped;
   $sddt_day_int   = DATEFUNC_year_month_days($year_clipped, $month_clipped);
   $sddt = DT8_make_from_ints($sddt_year_int, $sddt_month_int, $sddt_day_int);
   }
else
   {
   //Do nothing.  Selected date is satisfactory.
   }
//
//----------------------------------------------------------------------------------------------------
//Store the sddt and sdtim as part of the session, if a user is logged in.  This eliminates the
//hassle (for a logged-in user) of carrying these GET/POST parameters all over the place.
//
if ($cursessioninfo !== FALSE)
   SESS_update_sddt_sdtim($cursessioninfo["sid"], $sddt, $sdtim);
//
//----------------------------------------------------------------------------------------------------
//Calculate an array of results to determine whether it is OK to set the date/time to:
//
//   a)A month ago.
//   b)A week ago.
//   c)A day ago.
//   d)One panel back.
//   e)One panel forward.
//   f)One day forward.
//   g)One week forward.
//   h)One month forward.
//
//This is done only once for computational ecomony.
//
$diff_time_perm_array = DATEFUNC_viewschedtime_differential_array(
                                                                  $sddt_year_int, 
                                                                  $sddt_month_int,
                                                                  $sddt_day_int,
                                                                  $sdtim_hour_int,
                                                                  $sdtim_minute_int
                                                                 );
//----------------------------------------------------------------------------------------------------
//Process the menu level adjustment request, if it was supplied.
//
if ($cursessioninfo !== FALSE)
   {
   if ($PAR_menulvladjst !== FALSE)
      {
      if ($PAR_menulvladjst == -1)
         $cursessioninfo["menulvl"] = SESS_menulevel_decrement($cursessioninfo["sid"], $cursessioninfo["menulvl"]);
      else if ($PAR_menulvladjst == 1)
         $cursessioninfo["menulvl"] = SESS_menulevel_increment($cursessioninfo["sid"], $cursessioninfo["menulvl"]);
      }
   }
//
//----------------------------------------------------------------------------------------------------
//Do the page proper.
//
//echo "Year is : " . $sddt_year_int . " ";
if ($temppasswdlogin)
   {
   //Redirect to password change if the user logs in using a temporary password.  
   //User can back out of it, but this is a strong hint.
   //
   display_pwchange_redirect(
                            $curuserinfo,
                            $cursessioninfo,
                            $sddt_year_int,  $sddt_month_int,  $sddt_day_int,
                            $sdtim_hour_int, $sdtim_minute_int
                            );
   }
else
   {
   //The ordinary page.
   //
   display_dayview_page(
                       $curuserinfo,
                       $cursessioninfo,
                       $sddt_year_int,  $sddt_month_int,  $sddt_day_int,
                       $sdtim_hour_int, $sdtim_minute_int,
                       $diff_time_perm_array,
                       $panel,
                       $pwauthfailure
                       );
   }
//
//----------------------------------------------------------------------------------------------------
//Although it is done automatically, close the MySQL connection if it is open.
//
if ($GLOBAL_dbhandle !== FALSE)
   {
     if (mysql_close($GLOBAL_dbhandle) === FALSE)
       {
       //Make a log entry to the system log.
       LOG_syslog("Failure to close MySQL connection in \"" . $_SERVER["PHP_SELF"] . "\".");
       }
     else
       {
       //The close was successful.  Set the global variable to FALSE.  This must be done in
       //order to prevent the registered shutdown function from whining.
       $GLOBAL_dbhandle = FALSE;
       }
   }
//
//----------------------------------------------------------------------------------------------------
//End of $RCSfile: index.php,v $.
//----------------------------------------------------------------------------------------------------
?>