<?php


class _DatabaseHandler extends stdClass
{
  //
  public $dbc;   // OLD.  DEPRECATED
  public $pdo;

  function __construct()
  {
   
    $db_host = @$GLOBALS["fp_system_settings"]["db_host"];
    $db_port = @$GLOBALS["fp_system_settings"]["db_port"];
    $db_user = @$GLOBALS["fp_system_settings"]["db_user"];
    $db_pass = @$GLOBALS["fp_system_settings"]["db_pass"];
    $db_name = @$GLOBALS["fp_system_settings"]["db_name"];

    if ($db_host == "") return;  // some problem, do not proceed with the attempt to construct.

    $db_host_ip = $db_host;  // set as same as db_host for now.
    
    
        
    //$this->dbc = mysql_connect ($db_host, $db_user, $db_pass) or die('Could not connect to database: ' . mysql_error());
    //mysql_select_db ($db_name);

    // Connection by IP address is fastest, so let's always try to do that.
    // It can be time-consuming to convert our hostname to IP address.  Cache it in our SESSION
    if (isset($_SESSION["fp_db_host_ip"])) {
      $db_host_ip = $_SESSION["fp_db_host_ip"];
      if (!$db_host_ip) $db_host_ip = $db_host;
    }
    else {
      // Convert our db_host into an IP address, then save to simple SESSION cache.
      $db_host_ip = trim(gethostbyname($db_host));
      if (!$db_host_ip) $db_host_ip = $db_host;
      $_SESSION["fp_db_host_ip"] = $db_host_ip;
    }

    // Connect using PDO
    if (!$this->pdo) {
      $this->pdo = new PDO("mysql:host=$db_host_ip;port=$db_port;dbname=$db_name;charset=utf8", $db_user, $db_pass,
        array(
          PDO::MYSQL_ATTR_LOCAL_INFILE => true,
        ));
      // Set our error handling...  (using "silent" so I can catch errors in try/catch and display them, email, etc, if wanted.)
      $this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

           
    }
    
  }


  /**
   * This is a PHP "magic" function.  Called during a serialize command.
   * Basically, we aren't trying to save any local variables.
   * In fact, we will get a fatal exception if we try to serialize our PDO connection.
   */
  function __sleep() {
    return array();  
  }

  /**
   * This function is called when this objectis unserialized.  We want to reconnect to the database, so we'll call our constructor. 
   */
  function __wakeup() {
    $this->__construct();
  }



  function z__get_help_page($i)
  {
    depricated_message();
    
    $rtn_array = array();


    $res = $this->db_query("SELECT * FROM help WHERE `id`='?' ", $i);
    $cur = $this->db_fetch_array($res);
    $rtn_array["title"] = trim($cur["title"]);
    $rtn_array["body"] = trim($cur["body"]);

    return $rtn_array;

  }

  
  function z__add_to_log($action, $extra_data = "", $notes = "")
  {
    
    depricated_message();
    
    // Add a row to the log table.
    $ip = $_SERVER["REMOTE_ADDR"];
    $url = mysql_real_escape_string($_SERVER["REQUEST_URI"]);
    $user_id = $_SESSION["fp_user_id"];
    $user_type = $_SESSION["fp_user_type"]; 
    $user_name = mysql_real_escape_string($_SESSION["fp_user_name"]);
    $action = mysql_real_escape_string($action);
    $extra_data = mysql_real_escape_string($extra_data);
    $notes = mysql_real_escape_string($notes);
    
    if ($GLOBALS["fp_page_is_mobile"]) {
      $notes = "M:" . $notes;
    }
    
    // This needs to be mysql_query, instead of "this->db_query", because
    // otherwise it might get into an infinite loop.
    $now = time();
    $query = "INSERT INTO log (user_id,
            user_name, user_type, action, extra_data, notes,
             ip, posted, from_url) VALUES (
            '$user_id','$user_name','$user_type','$action','$extra_data',
            '$notes',
            '$ip', '$now' ,'$url') ";
    $res = mysql_query($query) or die(mysql_error() . " - " . $query);


    
    

  }

  /**
   * Sets the maintenance mode.  $val should be either 0 (off) or 1 (on)
   *
   * @param integer $val
   */
  function set_maintenance_mode($val)
  {
    // Convenience function for setting maintenance mode. 0 = off, 1 = on.
    $this->set_settings_variable("maintenance_mode", $val);
  }

  
  
  
  function get_substitution_details($sub_id)
  {
    // Simply returns an associative array containing
    // the details of a substitution.  The subID specified
    // is the actual id of the row of the database in
    // flightpath.student_substitutions.

    $rtn_array = array();

    $res = $this->db_query("SELECT * FROM student_substitutions
                WHERE id = '?' ", $sub_id);
    if ($this->db_num_rows($res) > 0)
    {
      $cur = $this->db_fetch_array($res);
      $rtn_array["faculty_id"] = $cur["faculty_id"];
      $rtn_array["remarks"] = trim($cur["sub_remarks"]);
      $rtn_array["sub_hours"] = $cur["sub_hours"];
      $rtn_array["required_course_id"] = $cur["required_course_id"];
      $rtn_array["required_group_id"] = $cur["required_group_id"];
      $rtn_array["posted"] = $cur["posted"];
      $rtn_array["required_degree_id"] = $cur["required_degree_id"];
      $rtn_array["db_record"] = $cur;
    }

    return $rtn_array;

  }

  function update_user_settings_from_post($user_id)
  {
    // This will retrieve various user settings from the POST
    // and write them to the user_settings table as XML.
    $db = new DatabaseHandler();

    if ($user_id*1 < 1)
    {
      
      return false;
    }

    // First, we need to GET the user's settings array...
    if (!$user_settings_array = $this->get_user_settings($user_id))
    {
      // No existing userSettingsArray, or it's corrupted.
      // Make a new one.
      $user_settings_array = array();
    }

    // Now, update values in the settingsArray, if they are
    // present in the POST.
    if (trim($_POST["hide_charts"]) != "")
    {
      $user_settings_array["hide_charts"] = trim($_POST["hide_charts"]);
    }

    // Now, write it back to the settings table...
    $res = $this->db_query("REPLACE INTO user_settings(user_id,
                settings, posted)
                VALUES ('?','?', '?' )", $user_id, serialize($user_settings_array), time());

    watchdog("update_user_settings", "Hide charts set to: @hide", array("@hide" => $user_settings_array["hide_charts"]));

    return true;



  }

  function get_user_settings($user_id)
  {
    // return an array of this user's current settings.

    $res = $this->db_query("SELECT * FROM user_settings
                  WHERE 
                  user_id = '?' ", $user_id);
    $cur = $this->db_fetch_array($res);

    if (!$rtn = unserialize($cur["settings"])) {
      $rtn = array();
    }
    
    return $rtn;
    
  }

  


  function get_developmental_requirements($student_cwid)
  {
    // returns an array which states whether or not the student
    // requires any developmental requirements.

    $rtn_array = array();
    
    $res = $this->db_query("SELECT * FROM student_developmentals
                       WHERE student_id = '?' ", $student_cwid);
    while($cur = $this->db_fetch_array($res)) {
      $rtn_array[] = $cur["requirement"];
    }

    return $rtn_array;

  }



  function z__get_table_transfer_data_string($table_name, $table_structure, $where_clause = "")
  {
    // This function will return a string of all the data
    // in a particular table, formatted with delimeters.
    // %R~ separates rows, %C~ separates columns.
    // We expect the tableStructure to be a csv of the
    // column names.
    $rtn = "";


    $res = mysql_query("select $table_structure from $table_name $where_clause") or die_and_mail(mysql_error());
    while ($cur = mysql_fetch_row($res))
    {
      $new_row = "";

      foreach($cur as $key => $value)
      { // put all the values returned together...
        $new_row .= $value . "%C~";
      }
      // Remove last %C%...
      $new_row = substr($new_row, 0, -3);

      // Add it to the rtn...
      $rtn .= $new_row . "%R~";

    }

    // Remove the last %R%...
    $rtn = substr($rtn, 0, -3);

    return $rtn;
  }


  
  /**
   * This is a simple helper function which "escapes" the question marks (?) in
   * the string, by changing them to "??".  This makes it suitable for use
   * within db_query(), but not necessary if used as an argument.  Ex:
   * db_query("INSERT ... '" . $db->escape_question_marks($xml) . "' ");  is good.
   * db_query("INSERT ... '?' ", $xml);  is good.   This function not needed.
   *
   * @param unknown_type $str
   */
  function escape_question_marks($str) {
    $rtn = str_replace("?", "??", $str);
    return $rtn;
  }
  

  
  /**
   * This function is used to perform a database query. It uses PDO execute, which will
   * take automatically replace ? with variables you supply as the arguments to this function,
   * or as an array to this function.  Either will work.
   * Do this by using ?, or naming the variable like :name or :age.
   * 
   * For example:
   * $result = $db->db_query("SELECT * FROM table WHERE name = ? and age = ? ", $name, $temp_age);
   * or
   * $result = $db->db_query("SELECT * FROM table WHERE name = ? AND age = ? ", array($name, $temp_age));
   * or
   * $result = $db->db_query("SELECT * FROM table WHERE name = :name ", array(":name" => $name));
   *
   * @param unknown_type $sql_query
   * @return unknown
   */
  function db_query($sql_query, $args = array()) {

    // If there were any arguments to this function, then we must first apply
    // replacement patterns.
    $args = func_get_args();
  
    array_shift($args);
    if (isset($args[0]) && is_array($args[0])) {
      // If the first argument was an array, it means we passed an array of values instead
      // of passing them directly.  So use them directly as our args.
      $args = $args[0];      

      // If we were supplied an array, then we need to see if the NEW args[0] is an array...  If it is, grab the first element AGAIN.
      if (isset($args[0]) && is_array($args[0])) {
        $args = $args[0];
      }
    }

    
    // We need to make sure that arguments are passed without being contained in single quotes ('?').  Should be just ?
    $sql_query = str_replace("'?'", "?", $sql_query);

    // If $c (number of replacements performed) does not match the number of replacements
    // specified, warn the user.
    /*
     * Don't do this anymore, as it might throw off queries that don't use ?'s, but instead use :var  as the replacements.
     * 
    if (substr_count($sql_query, "?") != count($args)) {
      fpm("<br><b>WARNING:</b> Replacement count does not match what was supplied to query: $sql_query<br><br>");
    } 
     */    
    
    //////////////////////////////////////////////
    
    // Run the sqlQuery and return the result set.
    if (!isset($this->pdo) || $this->pdo == NULL) fpm(debug_backtrace());
    
    
    try {      
      $result = $this->pdo->prepare($sql_query);
      $result->execute($args);
      $_SESSION["fp_last_insert_id"] = $this->pdo->lastInsertId();  // capture last insert id, in case we ask for it later.   
      return $result;
    } 
    catch (Exception $ex) {
      // Some error happened!
      $this->db_error($ex);
    }
    
    /*
    $result = mysql_query($sql_query, $this->dbc);
    if ($result)
    {
      return $result;
    } else {
      // Meaning, the query failed...
      // Do nothing.  Do not attempt to log anything, as that could cause an infinite loop.     
      
      // Display the error on screen
      $this->db_error();
    }
     **/
    
  } // db_query 
  

  /**
   * Draw out the error onto the screen.
   *
   */
  function db_error(Exception $ex)
  {
    global $user;
        
    $arr = $ex->getTrace();
    
    $when_ts = time();
    $when_english = format_date($when_ts);
    
    $message = $ex->getMessage();
    
    // If the message involves a complaint about the sql_mode, point the user to a
    // help page about setting the sql_mode.
    if (stristr($message, "sql_mode=")) {
    	$message .= "<br><br><b>" . t("It appears this error is being caused because of your server's sql_mode setting.") . "</b> ";
    	$message .= t("To set your sql_mode for MySQL, please see the following help page: <a href='http://getflightpath.com/node/1161' target='_blank'>http://getflightpath.com/node/1161</a>");
    }
    
    
    $file = $arr[2]["file"];
    if (strlen($file) > 50) {
      $file = "..." . substr($file, strlen($file) - 50);
    }
    
    
    $file_and_line = "Line " . $arr[2]["line"] . ": " . $file;
    
    
    // If we are on production, email someone!
    if (@$GLOBALS["fp_system_settings"]["notify_mysql_error_email_address"] != "")
    {
      $server = $_SERVER["SERVER_NAME"] . " - " . $GLOBALS['fp_system_settings']['base_url'];
      $email_msg = t("A MYSQL error has occured in FlightPath.") . "  
      Server: $server
      
      Timestamp: $when_ts ($when_english)
      
      Error:
      $message
      Location:
      $file_and_line
      
      Backtrace:
      " . print_r($arr, true) . "
      ";
      fp_mail($GLOBALS["fp_system_settings"]["notify_mysql_error_email_address"], "FlightPath MYSQL Error Reported on $server", $email_msg);
    }
        
    fpm(t("A MySQL error has occured:") . " $message<br><br>Location: $file_and_line<br><br>" . t("The backtrace:"));
    fpm($arr);

    if (@$GLOBALS["fp_die_mysql_errors"] == TRUE) {
      print "\n<br>The script has stopped executing because of a MySQL error:
                    $message<br>
                    Location: $file_and_line<br>\n
             Please fix the error and try again.<br>\n";
      print "<br><br>Timestamp: $when_ts ($when_english)
              <br><br>Program backtrace:
              <pre>" . print_r($arr, true) . "</pre>";
      die;
    }
    
    // Also, check to see if the mysql_err is because of a lost connection, as in, the
    // server went down.  In that case, we should also terminate immediately, rather
    // than risk spamming an email recipient with error emails.
    if (stristr($message, "Lost connection to MySQL server")
        || stristr($message, "MySQL server has gone away")) {

      print "<h2 style='font-family: Arial, sans serif;'>Database Connection Error</h2>
              <br>
              <div style='font-size: 1.2em; font-family: Arial, sans serif; padding-left: 30px;
                          padding-right: 30px;'>
              Sorry, but it appears the database is currently unavailable.  This may
              simply be part of scheduled maintenance to the database server.  Please
              try again in a few minutes.  If the problem persists for longer
              than an hour, contact your technical support
              staff.
              
              </div>
              
              ";

      
      // DEV:  Comment out when not needed.
      print "<pre>" . print_r($arr, TRUE) . "</pre>";
      
      die;          
    }
    
    

  } // db_error
  
  
  
  
  
  /**
   * This function is used to perform a database query.  It can take simple replacement patterns,
   * by using ?.  If you actually need to have a ? in the query, you can escape it with ??.
   * For example:
   * $result = $db->db_query("SELECT * FROM table WHERE name = '?' and age = ? ", $name, $temp_age);
   *
   * @param unknown_type $sql_query
   * @return unknown
   */
  function z__db_query($sql_query) {
    
    // If there were any arguments to this function, then we must first apply
    // replacement patterns.
    $args = func_get_args();
    array_shift($args);
    if (isset($args[0]) && is_array($args[0])) {
      // If the first argument was an array, it means we passed an array of values instead
      // of passing them directly.  So use them directly as our args.
      $args = $args[0];
    }

    // The query may contain an escaped ?, meaning "??", so I will replace that with something
    // else first, then change it back afterwards.
    $sql_query = str_replace("??", "~ESCAPED_Q_MARK~", $sql_query);
        
    // If $c (number of replacements performed) does not match the number of replacements
    // specified, warn the user.
    if (substr_count($sql_query, "?") != count($args)) {
      fpm("<br><b>WARNING:</b> Replacement count does not match what was supplied to query: $sql_query<br><br>");
    }    
    
    if (count($args) > 0) {
      // Replace each occurance of "?" with what's in our array.
      
      foreach ($args as $replacement) {
        // Escape the replacement...
        // The replacement might ALSO have a question mark in it.  Escape that too.
        if (strpos($replacement, "?") !== 0) {
          $replacement = str_replace("?", "~ESCAPED_Q_MARK~", $replacement);
        }
        
        // Because mysql_real_escape_string will allow \' to pass through, I am going to
        // first use mysql_real_escape_string on all slashes.
        $replacement = str_replace("\\" , mysql_real_escape_string("\\"), $replacement);
        // Okay, perform the replacement
        $replacement = mysql_real_escape_string($replacement);
        
        // If we have a $ followed by a number (like $99), preg_replace will remove it.  So, let's escape the $ if so.
        /// if so.
        $replacement = addcslashes($replacement, '$');
        
        $sql_query = preg_replace("/\?/", $replacement, $sql_query, 1); 
           
      }
      
    }
        
    $sql_query = str_replace("~ESCAPED_Q_MARK~", "?", $sql_query);      
    
    //////////////////////////////////////////////
    
    // Run the sqlQuery and return the result set.
    if (!is_resource($this->dbc)) fpm(debug_backtrace());
    $result = mysql_query($sql_query, $this->dbc);
    if ($result)
    {
      return $result;
    } else {
      // Meaning, the query failed...
      // Do nothing.  Do not attempt to log anything, as that could cause an infinite loop.     
      
      // Display the error on screen
      $this->db_error();
    }
  }


  /**
   * Draw out the error onto the screen.
   *
   * @param unknown_type $sql
   */
  function z__db_error($msg = "")
  {
    
    $arr = debug_backtrace();
    
    $when_ts = time();
    $when_english = format_date($when_ts);
    
    $mysql_err = mysql_error();
    
    // If we are on production, email someone!
    if (@$GLOBALS["fp_system_settings"]["notify_mysql_error_email_address"] != "")
    {
      $server = $_SERVER["SERVER_NAME"];
      $email_msg = t("A MYSQL error has occured in FlightPath.") . "  
      Server: $server
      
      Timestamp: $when_ts ($when_english)
      
      Error:
      $mysql_err
      
      Comments:
      $msg
      
      Backtrace:
      " . print_r($arr, true) . "
      ";
      fp_mail($GLOBALS["fp_system_settings"]["notify_mysql_error_email_address"], "FlightPath MYSQL Error Reported on $server", $email_msg);
    }
        
    fpm(t("A MySQL error has occured:") . " $mysql_err<br><br>" . t("The backtrace:"));
    fpm($arr);

    if (@$GLOBALS["fp_die_mysql_errors"] == TRUE) {
      print "\n<br>The script has stopped executing because of a MySQL error:
                    $mysql_err<br>\n
             Please fix the error and try again.<br>\n";
      print "<br><br>Timestamp: $when_ts ($when_english)
              <br><br>Program backtrace:
              <pre>" . print_r($arr, true) . "</pre>";
      die;
    }
    
    // Also, check to see if the mysql_err is because of a lost connection, as in, the
    // server went down.  In that case, we should also terminate immediately, rather
    // than risk spamming an email recipient with error emails.
    if (stristr($mysql_err, "Lost connection to MySQL server")
        || stristr($mysql_err, "MySQL server has gone away")) {

      print "<h2 style='font-family: Arial, sans serif;'>Database Connection Error</h2>
              <br>
              <div style='font-size: 1.2em; font-family: Arial, sans serif; padding-left: 30px;
                          padding-right: 30px;'>
              Sorry, but it appears the database is currently unavailable.  This may
              simply be part of scheduled maintenance to the database server.  Please
              try again in a few minutes.  If the problem persists for longer
              than an hour, contact your technical support
              staff.
              
              </div>
              
              ";
      die;          
    }
    
    

  }
  
  
  function request_new_group_id()
  {
    // Return a valid new group_id...

    for ($t = 0; $t < 100; $t++)
    {
      $id = mt_rand(1,9999999);
      // Check for collisions...
      $res4 = $this->db_query("SELECT * FROM draft_group_requirements
              WHERE group_id = '$id' LIMIT 1");
      if ($this->db_num_rows($res4) == 0)
      { // Was not in the table already, so use it!
        return $id;
      }
    }

    return false;

  }



  function request_new_course_id()
  {
    // Return a valid new course_id...

    for ($t = 0; $t < 100; $t++)
    {
      $id = mt_rand(1,9999999);
      // Check for collisions...
      $res4 = $this->db_query("SELECT * FROM draft_courses
              WHERE course_id = '$id' LIMIT 1");
      if ($this->db_num_rows($res4) == 0)
      { // Was not in the table already, so use it!
        return $id;
      }
    }

    return false;

  }



  function load_course_descriptive_data($course = null, $course_id = 0)
  {

    $current_catalog_year = variable_get("current_catalog_year", "2006");
    $catalog_year = $current_catalog_year; // currentCatalogYear.
    if ($course != null)
    {
      $course_id = $course->course_id;
      $catalog_year = $course->catalog_year;
    }

    
    $cache_catalog_year = $catalog_year;

    $cache_catalog_year = 0;

    $array_valid_names = array();
    
    /*  NOTE:  This was never running it seems, so commenting it out.
    // First-- is this course in our GLOBALS cache for courses?
    // If it is, then load from that.
    if ($bool_load_from_global_cache == true &&
    $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["subject_id"] != "")
    {
      $subject_id = $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["subject_id"];
      $course_num = $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["course_num"];
      $title = $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["title"];
      $description = $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["description"];
      $min_hours = $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["min_hours"];
      $max_hours = $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["max_hours"];
      $repeat_hours = $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["repeat_hours"];
      $db_exclude = $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["db_exclude"];
      $array_valid_names = $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["array_valid_names"];
      // load this into the course object, if not null.

      return;
    }
    */

    if ($course_id != 0)
    {
      $res = $this->db_query("SELECT * FROM courses
              WHERE course_id = '?' 
              AND catalog_year = '?'
              AND catalog_year <= '?' 
              AND delete_flag = '0' 
              AND exclude = '0' ", $course_id, $catalog_year, $current_catalog_year);
      $cur = $this->db_fetch_array($res);

      if ($this->db_num_rows($res) < 1)
      {
        
        // No results found, so instead pick the most recent
        // catalog year that is not excluded (keeping below the
        // current catalog year from the settings)

        //$this2 = new DatabaseHandler();
        $res2 = $this->db_query("SELECT * FROM courses
              WHERE `course_id`='?' 
              AND `subject_id`!='' 
              AND `delete_flag` = '0' 
              AND `exclude`='0'
              AND `catalog_year` <= '?'
              ORDER BY `catalog_year` DESC LIMIT 1", $course_id, $current_catalog_year);
        $cur = $this->db_fetch_array($res2);

        if ($this->db_num_rows($res2) < 1)
        {

          // Meaning, there were no results found that didn't have
          // the exclude flag set.  So, as a last-ditch effort,
          // go ahead and try to retrieve any course, even if it has
          // been excluded. (keeping below the
          // current catalog year from the settings)
          
          //$this3 = new DatabaseHandler();
          //
          $res3 = $this->db_query("SELECT * FROM courses
              WHERE course_id = '?' 
              AND subject_id != '' 
              AND delete_flag = '0' 
              AND catalog_year <= '?' 
              ORDER BY catalog_year DESC LIMIT 1", $course_id, $current_catalog_year);
          $cur = $this->db_fetch_array($res3);

        }

      }


      $title = $cur["title"];
      $description = trim($cur["description"]);
      $subject_id = trim(strtoupper($cur["subject_id"]));
      $course_num = trim(strtoupper($cur["course_num"]));

      $min_hours = $cur["min_hours"];
      $max_hours = $cur["max_hours"];
      $repeat_hours = $cur["repeat_hours"];
      if ($repeat_hours*1 < 1)
      {
        $repeat_hours = $max_hours;
      }


      $db_exclude = $cur["exclude"];
      $data_entry_comment = $cur["data_entry_comment"];

      // Now, lets get a list of all the valid names for this course.
      // In other words, all the non-excluded names.  For most
      // courses, this will just be one name.  But for cross-listed
      // courses, this will be 2 or more (probably just 2 though).
      // Example: MATH 373 and CSCI 373 are both valid names for that course.
      $res = $this->db_query("SELECT * FROM courses
                    WHERE course_id = '?'
                    AND exclude = '0' ", $course_id);
      while($cur = $this->db_fetch_array($res))
      {
        $si = $cur["subject_id"];
        $cn = $cur["course_num"];
        if (in_array("$si~$cn", $array_valid_names))
        {
          continue;
        }
        $array_valid_names[] = "$si~$cn";
      }


    }





    if ($description == "")
    {
      $description = "There is no course description available at this time.";
    }

    if ($title == "")
    {
      $title = "$subject_id $course_num";
    }


    // Now, to reduce the number of database calls in the future, save this
    // to our GLOBALS cache...

    $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["subject_id"] = $subject_id;
    $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["course_num"] = $course_num;
    $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["title"] = $title;
    $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["description"] = $description;
    $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["min_hours"] = $min_hours;
    $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["max_hours"] = $max_hours;
    $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["repeat_hours"] = $repeat_hours;
    $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["db_exclude"] = $db_exclude;
    $GLOBALS["fp_course_inventory"][$course_id][$cache_catalog_year]["array_valid_names"] = $array_valid_names;

    $GLOBALS["cache_course_inventory"] = true;  //  rebuild this cache before it closes.


    // Should we put all this into our course object?







  }



  function duplicate_course_for_year($course = null, $catalog_year)
  {
    // Duplicate the course for the given catalog_year.
    // If it already exists for that catalog_year, delete it from the
    // table.
    // In other words, copy all course data from some valid year into this
    // new year.

    $c = $course;
    $course_id = $c->course_id;


    $min_hours = $c->min_hours;
    $max_hours = $c->max_hours;
    
    if (@$c->bool_ghost_min_hour) {
      $min_hours = 0;     
    }
    
    if (@$c->bool_ghost_hour) {
      $max_hours = 0;
    }
    

    $res = $this->db_query("DELETE FROM draft_courses WHERE
              course_id = '?' AND catalog_year = '?' 
                AND subject_id = '?' 
                AND course_num = '?' ", $course_id, $catalog_year, $c->subject_id, $c->course_num);

    $res2 = $this->db_query("INSERT INTO draft_courses(course_id,
                subject_id, course_num, catalog_year,
                title, description, min_hours, max_hours,
                repeat_hours, exclude) values (
                '?','?','?','?','?','?','?','?','?','?') 
                ", $course_id, $c->subject_id,$c->course_num,$catalog_year,$c->title,$c->description,$min_hours,$max_hours,$c->repeat_hours,$c->db_exclude);



  }

  function update_course_requirement_from_name($subject_id, $course_num, $new_course_id)
  {
    // This will convert all instances of subject_id/course_num
    // to use the newCourseID.  It looks through the requirements tables
    // that may have listed it as a requirement.  We will
    // look specifically at the data_entry_value to do some of them.

    // ************  IMPORTANT ****************
    // This is used only by dataentry.  It is intentionally
    // not doing the draft tables!
    
    $res = $this->db_query("UPDATE degree_requirements
                set `course_id`='?'
                where `data_entry_value`= ? ", $new_course_id, "$subject_id~$course_num") ;

    $res = $this->db_query("UPDATE group_requirements
                SET `course_id`='?'
                WHERE `data_entry_value`= ? ", $new_course_id, "$subject_id~$course_num") ;



    // Also update substitutions....
    $res = $this->db_query("UPDATE student_substitutions
                SET `sub_course_id`='?'
                WHERE `sub_entry_value`= ? ", $new_course_id, "$subject_id~$course_num") ;

    $res = $this->db_query("UPDATE student_substitutions
                SET `required_course_id`='?'
                WHERE `required_entry_value`= ? ", $new_course_id, "$subject_id~$course_num") ;

    // Also the advising histories....
    $res = $this->db_query("UPDATE advised_courses
                SET `course_id`='?'
                WHERE `entry_value`= ? ", $new_course_id, "$subject_id~$course_num") ;
    
    
    

  }
  
  function add_draft_instruction($text)
  {
    // Adds a new "instruction" to the draft_instructions table.
    // Simple insert.
    $res = $this->db_query("INSERT INTO draft_instructions
                (instruction) VALUES ('?') ", $text);
  }
  

  function update_course_id($from_course_id, $to_course_id, $bool_draft = false)
  {
    // This will convert *all* instances of "fromCourseID"
    // across every table that it is used, to toCourseID.
    // Use this function when you want to change a course's
    // course_id in the database.

    $table_array = array("advised_courses",
    "courses",
    "degree_requirements",
    "group_requirements",
    "student_unassign_group");

    if ($bool_draft)
    { // only do the draft tables...
      $table_array = array(
      "draft_courses",
      "draft_degree_requirements",
      "draft_group_requirements",
      );
    }


    // Do the tables where it's named "course_id"...
    foreach($table_array as $table_name)
    {

      $res = $this->db_query("UPDATE $table_name
                SET course_id = '?'
                WHERE course_id = '?' ", $to_course_id, $from_course_id);
    }


    $res = $this->db_query("update student_substitutions
            set `required_course_id`='?'
            where `required_course_id`='?' ", $to_course_id, $from_course_id);

    $res = $this->db_query("update student_substitutions
            set `sub_course_id`='?'
            where `sub_course_id`='?' 
               and `sub_transfer_flag`='0' ", $to_course_id, $from_course_id);

    $res = $this->db_query("update transfer_eqv_per_student
            set `local_course_id`='?'
            where `local_course_id`='?' ", $to_course_id, $from_course_id);



  }



  /**
   * Given an advising_session_id, create a duplicate of it as a new session_id (and return the new session_id).
   * 
   * All the values can be left blank to mean "keep what is in there".  If they have values supplied in the arguments to this function,
   * then the new values will be used.
   */
  function duplicate_advising_session($advising_session_id, $faculty_id = "", $student_id = "", $term_id = "", $degree_id = "", $is_whatif = "", $is_draft = "") {
    $now = time();     
      
    // First, get the details of this particular advising session....
    $res = db_query("SELECT * FROM advising_sessions WHERE advising_session_id = ?", $advising_session_id);
    $cur = db_fetch_array($res);  
    
    // Get our values....
    $db_student_id = ($student_id == "") ? $cur["student_id"] : $student_id;  
    $db_faculty_id = ($faculty_id == "") ? $cur["faculty_id"] : $faculty_id;  
    $db_term_id = ($term_id == "") ? $cur["term_id"] : $term_id;  
    $db_degree_id = ($degree_id == "") ? $cur["degree_id"] : $degree_id;  
    $db_major_code_csv = $cur["major_code_csv"];  
    $db_catalog_year = $cur["catalog_year"];  
    $db_posted = $now;  
    $db_is_whatif = ($is_whatif == "") ? $cur["is_whatif"] : $is_whatif;
    $db_is_draft = ($is_draft == "") ? $cur["is_draft"] : $is_draft;
    $db_is_empty = $cur["is_empty"];
    
    // Okay, let's INSERT this record, and capture the new advising_session_id...
    $res = db_query("INSERT INTO advising_sessions
              (student_id, faculty_id, term_id, degree_id, major_code_csv, catalog_year, posted, is_whatif, is_draft, is_empty)
              VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
              ", $db_student_id, $db_faculty_id, $db_term_id, $db_degree_id, $db_major_code_csv, $db_catalog_year, $db_posted, $db_is_whatif, $db_is_draft, $db_is_empty);
    
    $new_asid = db_insert_id();
    
    // Okay, now pull out the advised_courses, and insert again under the new_asid...
    $res = db_query("SELECT * FROM advised_courses WHERE advising_session_id = ?", $advising_session_id);
    while ($cur = db_fetch_array($res)) {
          
      db_query("INSERT INTO advised_courses (advising_session_id, course_id, entry_value, semester_num, group_id, var_hours, term_id, degree_id)
                VALUES (?, ?, ?, ?, ?, ?, ?, ?)", $new_asid, $cur["course_id"], $cur["entry_value"], $cur["semester_num"], $cur["group_id"], $cur["var_hours"], $cur["term_id"], $cur["degree_id"]);    
      
    }
    
    // Finished!
    return $new_asid;
      
    
  }


  function get_advising_session_id($faculty_id = "", $student_id = "", $term_id = "", $degree_id = "", $bool_what_if = false, $bool_draft = true, $bool_load_any_active_if_faculty_id_not_found = TRUE)
  {
    $is_what_if = "0";
    $is_draft = "0";    
    $draft_line = " and `is_draft`='0' ";
    $faculty_line = " and `faculty_id`='$faculty_id' ";

    $advising_session_id = 0;  // init

    if ($faculty_id == 0 || $faculty_id == "")
    { // If no faculty is specified, just get the first one to come up.
      $faculty_line = "";
    } 

    if ($bool_what_if == true){$is_what_if = "1";}
    if ($bool_draft == true)
    {
      $is_draft = "1";
      $draft_line = "";
      // If we are told to pull up draft, we can safely
      // assume we just want the most recent save, whether it
      // is saved as a draft or not.
    }



    $query = "select * from advising_sessions
                where
                    student_id = ?
                $faculty_line
                and term_id = ?
                and degree_id = ?
                and is_whatif = ?
                $draft_line
                order by `posted` desc limit 1";
    $result = $this->db_query($query, array($student_id, $term_id, $degree_id, $is_what_if)) ;
    if ($this->db_num_rows($result) > 0)
    {
      $cur = $this->db_fetch_array($result);
      $advising_session_id = $cur["advising_session_id"];
      return $advising_session_id;
    }
    
    
    if (intval($advising_session_id) < 1 && $bool_load_any_active_if_faculty_id_not_found) {
      // Meaning, we couldn't find a record for the supplied faculty_id.  Let's just load the most recent active one, regardless
      // of faculty_id.  Meaning, we need to make sure that is_draft = 0      
      $query = "select * from advising_sessions
                  where
                      student_id = ?                  
                  and term_id = ?
                  and degree_id = ?
                  and is_whatif = ?                  
                  and is_draft = 0
                  order by `posted` desc limit 1";
      $result = $this->db_query($query, array($student_id, $term_id, $degree_id, $is_what_if)) ;
      if ($this->db_num_rows($result) > 0) {
        $cur = $this->db_fetch_array($result);
        $advising_session_id = $cur["advising_session_id"];
        return $advising_session_id;        
      }
            
    }
    
    
    
    
    return 0;

  }


  /**
   * Returns the group_id for the given group name, or FALSE
   */
  function get_group_name($group_id) {
    $temp = explode("_", $group_id);
    $group_id = trim(@$temp[0]);
    

    // If it's already in our static cache, just return that.
    static $group_name_cache = array();
    if (isset($group_name_cache[$group_id])) {
      return $group_name_cache[$group_id];
    }    
    
    
    
    
    
    $res7 = $this->db_query("SELECT group_name FROM groups
              WHERE group_id = ?
              AND delete_flag = 0
               LIMIT 1 ", $group_id) ;
    if ($this->db_num_rows($res7) > 0)
    {
      $cur7 = $this->db_fetch_array($res7);
      
      // Save to our cache before returning.
      $group_name_cache[$group_id] = $cur7['group_name'];
      return $cur7['group_name'];
    }
    return FALSE;
    
    
  }



  function get_group_id($group_name, $catalog_year) {

    if ($catalog_year < $GLOBALS["fp_system_settings"]["earliest_catalog_year"])
    {
      $catalog_year = $GLOBALS["fp_system_settings"]["earliest_catalog_year"];
    }


    // If it's already in our static cache, just return that.
    static $group_id_cache = array();
    if (isset($group_id_cache[$group_name][$catalog_year])) {
      return $group_id_cache[$group_name][$catalog_year];
    }    

    

    $res7 = $this->db_query("SELECT group_id FROM groups
              WHERE group_name = ?
              AND catalog_year = ?
              AND delete_flag = 0
               LIMIT 1 ", $group_name, $catalog_year) ;
    if ($this->db_num_rows($res7) > 0)
    {
      $cur7 = $this->db_fetch_array($res7);
      
      // Save to our cache
      $group_id_cache[$group_name][$catalog_year] = $cur7['group_id'];
      return $cur7['group_id'];
    }
    return false;
  }



  function request_new_degree_id()
  {
    // Return a valid new id...

    for ($t = 0; $t < 100; $t++)
    {
      $id = mt_rand(1,9999999);
      // Check for collisions...
      $res4 = $this->db_query("SELECT * FROM draft_degrees
              WHERE `degree_id`='?' limit 1", $id);
      if ($this->db_num_rows($res4) == 0)
      { // Was not in the table already, so use it!
        return $id;
      }
    }

    return false;

  }


  function get_institution_name($institution_id)
  {
    // Return the name of the institution...
    
    $res = $this->db_query("SELECT * FROM transfer_institutions
                where institution_id = '?' ", $institution_id);
    $cur = $this->db_fetch_array($res);
    return trim($cur['name']);
  }



  /**
   * Retrieve a value from the variables table.
   *
   * @param string $name
   */
  function get_variable($name, $default_value = "") {
    $res = $this->db_query("SELECT value FROM variables
                           WHERE name = '?' ", $name);
    $cur = $this->db_fetch_array($res);
    
    $val = $cur["value"];
    if ($val == "") {
      $val = $default_value;
    }
    
    return $val;
  }
  
  
  /**
   * Sets a variable's value in the variables table.
   *
   * @param unknown_type $name
   * @param unknown_type $value
   */
  function set_variable($name, $value) {    

    $res2 = $this->db_query("REPLACE INTO variables (name, value)
                              VALUES ('?', '?') ", $name, $value);
    
  }
  
  
  function get_course_id($subject_id, $course_num, $catalog_year = "", $bool_use_draft = false)
  {
    // Ignore the colon, if there is one.
    if (strpos($course_num,":"))
    {
      //$course_num = substr($course_num,0,-2);
      $temp = explode(":", $course_num);
      $course_num = trim($temp[0]);
    }

    
    // Always override if the global variable is set.
    if (@$GLOBALS["fp_advising"]["bool_use_draft"] == true) {
      $bool_use_draft = true;
    }
    
    
    $catalog_line = "";

    if ($catalog_year != "")
    {
      $catalog_line = "and `catalog_year`='$catalog_year' ";
    }

    $table_name = "courses";
    if ($bool_use_draft){$table_name = "draft_$table_name";}
    
    $res7 = $this->db_query("SELECT course_id FROM $table_name
              WHERE subject_id = ?
              AND course_num = ?
              $catalog_line
               ORDER BY catalog_year DESC LIMIT 1 ", $subject_id, $course_num) ;
    if ($this->db_num_rows($res7) > 0)
    {
      $cur7 = $this->db_fetch_array($res7);
      return $cur7["course_id"];
    }
    return FALSE;
  }


  function get_student_settings($student_cwid)
  {
    // This returns an array (from the xml) of a student's
    // settings in the student_settings table.  It will
    // return FALSE if the student was not in the table.

    $res = $this->db_query("SELECT settings FROM student_settings
              WHERE student_id = '?' ", $student_cwid) ;
    if ($this->db_num_rows($res) < 1)
    {
      return false;
    }

    $cur = $this->db_fetch_array($res);
    
    if (!$rtn = unserialize($cur["settings"])) {
      $rtn = array();
    }

    return $rtn;

  }


  function get_student_cumulative_hours($student_cwid) {
    
    // Let's perform our queries.
    $res = $this->db_query("SELECT cumulative_hours FROM students 
                      WHERE cwid = '?' ", $student_cwid);

    
    $cur = $this->db_fetch_array($res);
    return $cur["cumulative_hours"];
    
  }


  function get_student_gpa($student_cwid) {
    
    // Let's perform our queries.
    $res = $this->db_query("SELECT gpa FROM students 
                      WHERE cwid = '?' ", $student_cwid);

    
    $cur = $this->db_fetch_array($res);
    return $cur["gpa"];
    
  }



  function get_student_catalog_year($student_cwid) {
      
    // Let's perform our queries.
    $res = $this->db_query("SELECT catalog_year FROM students 
                      WHERE cwid = '?' ", $student_cwid);

    
    $cur = $this->db_fetch_array($res);
    $catalog = $cur["catalog_year"];
    
    $temp = explode("-", $catalog);
    return trim($temp[0]);
  }

  
  /**
   * Returns whatever is in the Rank field for this student.
   * Ex: JR, SR, FR, etc.
   *
   * @param unknown_type $student_id
   * @return unknown
   */
  function get_student_rank($student_cwid) {
    
    
    // Let's perform our queries.
    $res = $this->db_query("SELECT rank_code FROM students 
                      WHERE cwid = '?' ", $student_cwid);

    
    $cur = $this->db_fetch_array($res);
    $rank = $cur["rank_code"];
        
    return trim($rank);
  }
  
  
  
  
  
  /**
   * Returns the student's first and last name, put together.
   * Ex: John Smith or John W Smith.
   *
   * @param int $student_id
   * @return string
   */
  function get_student_name($cwid) {
    
    // Let's perform our queries.
    $res = $this->db_query("SELECT f_name, l_name FROM users 
                      WHERE cwid = ?
                      AND is_student = 1 ", $cwid);
    
    $cur = $this->db_fetch_array($res);
    $name = $cur["f_name"] . " " . $cur["l_name"];

    // Force into pretty capitalization.
    // turns JOHN SMITH into John Smith 
    $name = ucwords(strtolower($name));
    
    return trim($name);
  } 
  
  
  
  /**
   * Returns the faculty's first and last name, put together.
   * Ex: John Smith or John W Smith.
   *
   * @param int $faculty_id
   * @return string
   */
  function get_faculty_name($cwid) {
    // Let's pull the needed variables out of our settings, so we know what
    // to query, because this is a non-FlightPath table.
    //$tsettings = $GLOBALS["fp_system_settings"]["extra_tables"]["human_resources:faculty_staff"];
    //$tf = (object) $tsettings["fields"];  //Convert to object, makes it easier to work with.  
    //$table_name = $tsettings["table_name"];   
    
    
    // Let's perform our queries.
    $res = $this->db_query("SELECT f_name, l_name FROM users 
                      WHERE cwid = '?'
                      AND is_faculty = '1' ", $cwid);

    
    $cur = $this->db_fetch_array($res);
    $name = $cur["f_name"] . " " . $cur["l_name"];


    // Force into pretty capitalization.
    // turns JOHN SMITH into John Smith 
    $name = ucwords(strtolower($name));
    
    return trim($name);
  } 
  
  
  
  
  
    
  /**
   * Looks in our extra tables to find out what major code, if any, has been assigned
   * to this faculty member.
   *
   */
  function get_faculty_major_code_csv($faculty_cwid) {
            
    // Let's pull the needed variables out of our settings, so we know what
    // to query, because this is a non-FlightPath table.
    
    $res = $this->db_query("SELECT major_code_csv FROM faculty WHERE cwid = '?' ", $faculty_cwid);
    $cur = $this->db_fetch_array($res);
    
    return @$cur["major_code_csv"];      
    
  }
  
  // Deprecated, use the "_csv" version of this function instead.    
  function get_faculty_major_code($faculty_cwid) {
    
    depricated_message("db->get_faculty_major_code() is deprecated. Use get_faculty_major_code_csv() instead.");
    return $this->get_faculty_major_code_csv($faculty_cwid);    
    
  }
    
  
  function get_student_major_from_db($student_cwid)
  {
    depricated_message("db->get_student_major_from_db() is deprecated. use get_student_major*s* instead.");
    // Returns the student's major code from the DB.  Does not
    // return the track code.
    
    // Let's perform our queries.
    $res = $this->db_query("SELECT * FROM students 
                      WHERE cwid = '?' ", $student_cwid);
    
    
    $cur = $this->db_fetch_array($res);
    return trim($cur["major_code"]);
  }


  /**
   * Returns an array (or CSV string) of major_codes from the student_degrees table for this student.
   * 
   * If bool_check_for_allow_dynaic is TRUE, it means that, if the student has more than one degree returned, we will make sure that they all
   * have allow_dynamic = TRUE.  If they do not, we will use the first is_editable degree we find ONLY.  We do this because that means the student
   * had a situation like we see in FlightPath 4x, where only one degree may be selected at a time, and the is_editiable degree is the track/option they
   * selected.
   *   
   * 
   */
  function get_student_majors_from_db($student_cwid, $bool_return_as_full_record = FALSE, $perform_join_with_degrees = TRUE, $bool_skip_directives = TRUE, $bool_check_for_allow_dynamic = TRUE) {
    // Looks in the student_degrees table and returns an array of major codes.
    $rtn = array();
    
    // Keep track of degrees which have is_editable set to 1.
    $is_editable_true = array();
    $is_editable_false = array();
    
    
    if ($perform_join_with_degrees) {
        
      $catalog_year = $this->get_student_catalog_year($student_cwid);
      
      $res = $this->db_query("SELECT * FROM student_degrees a, degrees b
                              WHERE student_id = ? 
                              AND a.major_code = b.major_code
                              AND b.catalog_year = ?
                              ORDER BY b.advising_weight, b.major_code
                              ", $student_cwid, $catalog_year);
    }
    else {
      // No need to join with degrees table...
      $res = $this->db_query("SELECT * FROM student_degrees a
                              WHERE student_id = ?
                              ORDER BY major_code
                              ", $student_cwid);      
    }
    while ($cur = $this->db_fetch_array($res)) {
      
      if ($bool_skip_directives && strstr($cur["major_code"], "~")) continue;
      
      if ($bool_return_as_full_record) {
        $rtn[$cur["major_code"]] = $cur;
      }
      else {  
        $rtn[$cur["major_code"]] = $cur["major_code"];
      }
      
      if ($bool_check_for_allow_dynamic && !isset($cur['allow_dynamic']) && isset($cur['degree_id'])) {
        $cur['allow_dynamic'] = $this->get_degree_allow_dynamic($cur['degree_id']);
      }
      
      
      if ($cur['is_editable'] == 1) {
        $is_editable_true[] = $cur;
      }
      else {
        $is_editable_false[] = $cur;
      }
      
    }

    if ($bool_check_for_allow_dynamic && count($rtn) > 1) {
      
      // This means that we have more than one degree selected, and we have been asked to make sure that if any of the degrees have allow_dynamic = 0, then we will
      // only select the is_editable degree.
      
      foreach ($is_editable_false as $major) {
        if (isset($major['allow_dynamic']) && $major['allow_dynamic'] == 0) {
          // Meaning, allow dynamic is NOT allowed.  So, if we have ANYTHING in is_editable_true, then use THAT, else, use THIS.
          if (count($is_editable_true) > 0) {
            // Only get out 1 major.
            $x = $is_editable_true[0];
            $new_rtn[$x['major_code']] = $rtn[$x['major_code']];
            $rtn = $new_rtn;  
          }
          else {            
            $x = $major;
            $new_rtn[$x['major_code']] = $rtn[$x['major_code']];
            $rtn = $new_rtn;              
          }
        }
      }
      
    } // if bool_check_for_allow_dynamic
       
    
        
    
    return $rtn;
  }


  function get_flightpath_settings()
  {
    // Returns an array of everything in the flightpath_settings table.
    $rtn_array = array();
    $res = $this->db_query("SELECT * FROM flightpath_settings ") ;
    while($cur = $this->db_fetch_array($res))
    {
      $rtn_array[$cur["variable_name"]] = trim($cur["value"]);
    }

    return $rtn_array;

  }

  function get_degrees_in_catalog_year($catalog_year, $bool_include_tracks = false, $bool_use_draft = false, $bool_undergrad_only = TRUE, $only_level_nums = array(1,2))
  {
    // Returns an array of all the degrees from a particular year
    // which are entered into FlightPath.
    
    $undergrad_line = $degree_class_line = "";
    
    $table_name = "degrees";
    if ($bool_use_draft){$table_name = "draft_$table_name";}    
    
    // change this to be whatever the graduate code actually is.
    if ($bool_undergrad_only) $undergrad_line = "AND degree_level != 'GR' ";
    
    $degree_class_line = "";
    if (count($only_level_nums) > 0) { 
      $classes = fp_get_degree_classifications();
      foreach ($only_level_nums as $num) {
        foreach ($classes["levels"][$num] as $machine_name => $val) {
          $degree_class_line .= " degree_class = '" . addslashes($machine_name) . "' OR";
        }
      }
      // Remove training "OR" from degree_class_line
      $degree_class_line = substr($degree_class_line, 0, strlen($degree_class_line) - 2);
    }
    
    if ($degree_class_line != "") {
      $degree_class_line = "AND ($degree_class_line)";
    }
            
    $rtn_array = array();
    $res = $this->db_query("SELECT degree_id, major_code, title, degree_class FROM $table_name
                WHERE exclude = '0'
                AND catalog_year = ?                
                $undergrad_line
                $degree_class_line
                ORDER BY title, major_code ", $catalog_year);
    if ($this->db_num_rows($res) < 1)
    {
      return false;
    }

    while ($cur = $this->db_fetch_array($res))
    {
      $degree_id = $cur["degree_id"];
      $major = trim($cur["major_code"]);
      $title = trim($cur["title"]);
      $track_code = "";
      $major_code = $major;
                  
      // The major may have a track specified.  If so, take out
      // the track and make it seperate.
      if (strstr($major, "_"))
      {
        $temp = explode("_", $major);
        $major_code = trim($temp[0]);
        $track_code = trim($temp[1]);
        // The major_code might now have a | at the very end.  If so,
        // get rid of it.
        if (substr($major_code, strlen($major_code)-1, 1) == "|")
        {
          $major_code = str_replace("|","",$major_code);
        }


      }

      // Leave the track in if requested.
      if ($bool_include_tracks == true)
      {
        // Set it back to what we got from the db.
        $major_code = $major;
        $temp_degree = $this->get_degree_plan($major, $catalog_year, true);
        if ($temp_degree->track_code != "")
        {
          $title .= " - " . $temp_degree->track_title;
        }
      }

      $rtn_array[$major_code]["title"] = $title;
      $rtn_array[$major_code]["degree_id"] = $degree_id;
      $rtn_array[$major_code]["degree_class"] = trim(strtoupper($cur["degree_class"]));

    }

    return $rtn_array;

  }

  function get_degree_tracks($major_code, $catalog_year)
  {
    // Will return an array of all the tracks that a particular major
    // has.  Must match the major_code in degree_tracks table.
    // Returns FALSE if there are none.
    $rtn_array = array();
    
    static $degree_tracks_data_cache = array();
    if (isset($degree_tracks_data_cache[$catalog_year][$major_code])) {
      return $degree_tracks_data_cache[$catalog_year][$major_code];
    }    
    
    $res = $this->db_query("SELECT * FROM degree_tracks
                WHERE major_code = ?
                AND catalog_year = ? ", $major_code, $catalog_year);
    if ($this->db_num_rows($res) < 1)
    {
      $degree_tracks_data_cache[$catalog_year][$major_code] = false;
      return FALSE;
    }

    while($cur = $this->db_fetch_array($res))
    {
      extract($cur, 3, "db");
      $rtn_array[] = $db_track_code;
    }

    $degree_tracks_data_cache[$catalog_year][$major_code] = $rtn_array;
    return $rtn_array;

  }

  function get_degree_plan($major_and_track_code, $catalog_year = "", $bool_minimal = false)
  {
    // Returns a degreePlan object from the supplied information.
    
    // If catalog_year is blank, use whatever the current catalog year is, loaded from our settings table.
    if ($catalog_year == "") {
      $catalog_year = variable_get("current_catalog_year", "2006");
    }
    
    $degree_id = $this->get_degree_id(trim($major_and_track_code), $catalog_year);
    $dp = new DegreePlan($degree_id,null,$bool_minimal);
    if ($dp->major_code == "")
    {
      $dp->major_code = trim($major_and_track_code);
    }
    return $dp;
  }

  
  /**
   * Returns the value of a degree's allow_dynamic field in the database.
   * 
   * Returns boolean FALSE if it cannot find the degree.
   *
   * @param unknown_type $degree_id
   * @param unknown_type $bool_use_draft
   */
  function get_degree_allow_dynamic($degree_id, $bool_use_draft = FALSE) {

    $table_name = "degrees";
    if ($bool_use_draft){$table_name = "draft_$table_name";}
    
    $res7 = $this->db_query("SELECT allow_dynamic FROM $table_name
              WHERE degree_id = ?              
               ", $degree_id) ;
    if ($this->db_num_rows($res7) > 0)
    {
      $cur7 = $this->db_fetch_array($res7);
      return $cur7["allow_dynamic"];
    }
    return false;
    
    
    
  }
  
  
  function get_degree_id($major_and_track_code, $catalog_year, $bool_use_draft = FALSE)
  {
    // This function expects the major_code and track_code (if it exists)
    // to be joined using |_.  Example:
    // GSBA|_123  or  KIND|EXCP_231.
    // In other words, all in one.
        
    // Always override if the global variable is set.
    if (@$GLOBALS["fp_advising"]["bool_use_draft"] == true) {
      $bool_use_draft = true;
    }
    
    

    if ($catalog_year < $GLOBALS["fp_system_settings"]["earliest_catalog_year"])
    { // Lowest possible year.
      $catalog_year = $GLOBALS["fp_system_settings"]["earliest_catalog_year"];
    }

    $table_name = "degrees";
    if ($bool_use_draft){$table_name = "draft_$table_name";}
            
    $res7 = $this->db_query("SELECT degree_id FROM $table_name
              WHERE major_code = ?
              AND catalog_year = ?
               LIMIT 1 ", trim($major_and_track_code), $catalog_year) ;
    if ($this->db_num_rows($res7) > 0)
    {
      $cur7 = $this->db_fetch_array($res7);
      return $cur7["degree_id"];
    }
    return false;

  }


  // Returns a simple array of all degree_id's which match this major code, any catalog year.
  function get_degree_ids($major_code) {

    $rtn = array();

    $bool_use_draft = FALSE;

    // Always override if the global variable is set.
    if (@$GLOBALS["fp_advising"]["bool_use_draft"] == true) {
      $bool_use_draft = true;
    }
    
    $table_name = "degrees";
    if ($bool_use_draft){$table_name = "draft_$table_name";}
    
    $res7 = $this->db_query("SELECT degree_id FROM $table_name
                            WHERE major_code = ?              
                            ", trim($major_code)) ;
    
    while ($cur7 = $this->db_fetch_array($res7)) {      
      $rtn[$cur7["degree_id"]] = $cur7["degree_id"];
    }
    
    
    return $rtn;
    
    
  } // get_degree_ids



  function db_fetch_array($result) {
    if (!is_object($result)) return FALSE;
    
    return $result->fetch(PDO::FETCH_ASSOC);
  }

  function db_fetch_object($result) {
    if (!is_object($result)) return FALSE;
    
    return $result->fetch(PDO::FETCH_OBJ);
  }

  function db_num_rows($result) {
    if (!is_object($result)) return FALSE;
    
    return $result->rowCount();
  }

  function db_affected_rows($result) {
    
    return db_num_rows($result);
  }

  function db_insert_id() {
    //fpm($this->pdo->lastInsertId());    
    //return $this->pdo->lastInsertId();
    return $_SESSION["fp_last_insert_id"];
  }

  function db_close() {
    return $this->pdo = NULL;  // this is all you need to do to close a PDO connection.
  }


///////////////////////////////////////////////////
///////////////////////////////////////////////////
///////////////////////////////////////////////////

  function z__db_num_rows($result)  {
    return mysql_num_rows($result);
  }

  function z__db_affected_rows() {
     return mysql_affected_rows();
  }
  
  function z__db_insert_id() {
    return mysql_insert_id();
  }

  function z__db_fetch_array($result) {
    return mysql_fetch_array($result);
  }
  
  
  function z__db_fetch_object($result) {
    return mysql_fetch_object($result);
  }
  

  function z__db_close() {
    return mysql_close($this->dbc);
  }

  
  /////////////////////////////////////////////
  /////////////////////////////////////////////
  /////////////////////////////////////////////
  
  

}