<?php

/**
 * @file
 * This module allows users to search for courses, descriptions, and, if supported, rotation schedules
 * and sample syllabi.
 */


function course_search_menu() {
  $items = array();
  
  $items["tools/course-search"] = array(
    "title" => "Course Search",
    "description" => "Use this tool to view course descriptions, sample syllabi, and projected course offering schedules.",
    "page_callback" => "course_search_display_search",
    "access_arguments" => array('access_course_search'),
    "page_settings" => array(
      "page_hide_report_error" => TRUE,
      "target" => "_blank",
      "menu_icon" => fp_get_module_path('course_search') . "/icons/book_go.png",
    ),
    "type" => MENU_TYPE_NORMAL_ITEM,
  ); 

  
  $items["course-search/get-syllabus"] = array(
    "title" => "Course Search",
    "page_callback" => "course_search_download_syllabus",
    "access_arguments" => array('access_course_search'),
    "type" => MENU_TYPE_CALLBACK,
  );

  
  
  $items["admin/config/course-search"] = array(
    "title" => "Course Search settings",
    "description" => "Administer the Course Search module's settings",    
    "page_callback" => "fp_render_form",
    "page_arguments" => array("course_search_settings_form", "system_settings"),
    "access_arguments" => array("administer_course_search"),
    "page_settings" => array(
      
      
      "page_hide_report_error" => TRUE,      
      "menu_icon" => fp_get_module_path('course_search') . "/icons/book_go.png",
      "menu_links" => array(         
        0 => array(
          "text" => "Admin Console",
          "path" => "admin-tools/admin",
          "query" => "de_catalog_year=%DE_CATALOG_YEAR%",
        ),
      ),      
    ),
    "type" => MENU_TYPE_NORMAL_ITEM,
  );  
  
  $items["tools/course-search/courses"] = array(
    "title" => "Course Search",
    "page_callback" => "course_search_display_courses",
    "access_arguments" => array('access_course_search'),
    "page_settings" => array(
      
      
      "page_hide_report_error" => TRUE,
    ),
    "type" => MENU_TYPE_CALLBACK,
  );

  
  $items["tools/course-search/edit-list"] = array(
    "title" => "Update Course Information",
    "page_callback" => "course_search_display_edit_courses",
    "access_arguments" => array("can_update_course_info_details"),
    "page_settings" => array(
            
      "menu_links" => array(
        0 => array(
          "text" => "Back to Course Search",
          "path" => "tools/course-search",
        ),
      ),
    ),    
    "file" => menu_get_module_path("course_search") . "/course_search.edit.inc",
    "type" => MENU_TYPE_CALLBACK,
  );  
  
  
  $items["tools/course-search/edit-info-details"] = array(
    "title" => "Edit Course Info Details",
    "page_callback" => "fp_render_form",
    "page_arguments" => array("course_search_edit_course_details_form"),
    "access_arguments" => array("can_update_course_info_details"),
    "page_settings" => array(
      
      
      "menu_links" => array(
        0 => array(
          "text" => "Back to Course Search",
          "path" => "tools/course-search",
        ),
        1 => array(
          "text" => "Back to Course Edit List",
          "path" => "tools/course-search/edit-list",
          "query" =>"school_id=%SCHOOL_ID%",
        ),
      ),      
    ),        
    "file" => menu_get_module_path("course_search") . "/course_search.edit.inc",
    "type" => MENU_TYPE_CALLBACK,
  );

    
  return $items;
}

/**
 * Implements hook
 */
function course_search_menu_handle_replacement_pattern($str) {
  
  if (strpos($str, "%SCHOOL_ID%") !== 0) {
    if (!isset($_SESSION['last_saved_school_id'])) $_SESSION['last_saved_school_id'] = 0;
    // It contains this replacement pattern!
    $str = str_replace("%SCHOOL_ID%", intval($_SESSION['last_saved_school_id']), $str);
    unset($_SESSION['last_saved_school_id']);
  }
  
  if (strpos($str, "%SEV_FILTER%") !== 0) {
    // It contains this replacement pattern!
    $str = str_replace("%SEV_FILTER%", @$_GET["sev_filter"], $str);
  }

  if (strpos($str, "%TYPE_FILTER%") !== 0) {
    // It contains this replacement pattern!
    $str = str_replace("%TYPE_FILTER%", @$_GET["type_filter"], $str);
  }
  
  
  if (strpos($str, "%PAGE%") !== 0) {
    // It contains this replacement pattern!
    $str = str_replace("%PAGE%", @$_GET["page"], $str);
  }
    
  
  
  return $str;
}







function course_search_perm() {
  return array(
          "access_course_search" => array(
            'title' => t('Access course search'),
            'description' => t('Users with this setting are allowed to actually view the course search link,
                                descriptions, syllabi, etc.'),
          ),
          "administer_course_search" => array(
            "title" => t("Administer course search"),
            "description" => t("Users with this setting will be able
                              to modify settings for the Course Search module."),
          ),
          "can_update_course_info_details" => array(
            "title" => t("Can update course info details"),
            "description" => t("Allows users to update the 'course info' details,
                                like the course's sample syllabus and rotation
                                schedule."),
          ),
                    
          
  );
}



/**
 * The system settins form for course_search settings.
 */
function course_search_settings_form($school_id = 0) {
  $form = array();
  
  $school_id = intval($school_id);
  
  $fs = "";  // The field name suffix.  We will add this to the end of all of our field names.  If this is the default school, leave blank.
  if (module_enabled("schools")) {
    $school_name = schools_get_school_name_for_id($school_id);
    fp_set_title(t("Configure %school Course Search settings", array('%school' => $school_name)));
    if ($school_id !== 0) {
      $fs = "~~school_" . $school_id;
    }
  }
  
  $form['school_id'] = array(
    'type' => 'hidden',
    'value' => $school_id,
  );
    
    
  
  $form["course_search_avail_term_id_suffix_order" . $fs] = array(
    "type" => "textfield",
    "label" => t("Available Term ID Suffixes & Order"),
    "value" => variable_get_for_school("course_search_avail_term_id_suffix_order", "", $school_id, TRUE),
    "description" => t("Enter the order of term ID suffixes, so that they will display
                in the correct order in the table of available course
                offerings.  Separate by comma.") . "
                <br>
                Ex: 60, 40, 41, 80, 81, mm",
  );    
  
  
  $form["course_search_avail_term_headers" . $fs] = array(
    "type" => "textfield",
    "label" => t("Available Term Table Headers"),
    "value" => variable_get_for_school("course_search_avail_term_headers", "", $school_id, TRUE),
    "description" => t("Enter the table headers for the available table, in the same
                order as the suffix order above.") . "
                <br>
                Ex: Spring, May, Summer 1, Summer 2, Fall, Winter",
  );    

  
  // TODO:  I am not sure this is even used anymore.  If not, get rid of it.
  $form["course_search_avail_term_mobile_headers" . $fs] = array(
    "type" => "textfield",
    "label" => t("Available Term Mobile Table Headers"),
    "value" => variable_get_for_school("course_search_avail_term_mobile_headers", "", $school_id, TRUE),
    "description" => t("Enter the table headers for the available table, in the same
                order as the suffix order above, as it should be displayed on
                a mobile device (with a smaller screen).") . "
                <br>
                Ex: Spr, May, Sum1, Sum2, Fall, Win",
  );    
    

  
  

  
  return $form;
}



/**
 * This function will actually deliver a syllabus to the user's browser
 * for download.
 *
 */
function course_search_download_syllabus() {
  // Get our global variables...
  
  
  $id = trim($_REQUEST["id"]);
  
  $db = get_global_database_handler();
  
  
  $query = "select * from course_syllabi
          where course_id = ? ";
  $params = array($id);            

  
  $res = db_query($query, $params);
  $cur = db_fetch_array($res);
  $filename = $cur["filename"];
  
  $course_id = $cur["course_id"];
  $school_id = $db->get_school_id_for_course_id($course_id);
  
  // Get the latest subject_id and course_num for this course!
  $new_course = new Course();
  $new_course->course_id = $course_id;
  $new_course->school_id = $school_id;  
  $new_course->catalog_year = variable_get_for_school("current_catalog_year", 2006, $school_id);
  $new_course->load_descriptive_data(false, false, true);
  
  $subject_id = $new_course->subject_id;
  $course_num = $new_course->course_num;
  
  $files_path = $GLOBALS["fp_system_settings"]["file_system_path"];
  
  if ($filename == "" || !file_exists("$files_path/custom/files/syllabi/$filename"))
  { // Check to make sure the src file actually exists.
    // Display a message, letting the user know it does not
    // exist.
    watchdog("syllabus", "fail,$course_id", array(), WATCHDOG_ERROR);
    fp_add_message(t("Sorry, the syllabus for @course could not be found.", array("@course" => "$subject_id $course_num")));
    // Just so admins can see:
    fpm("Admin: file path attempted: $files_path/custom/files/syllabi/$filename");
    return;
  }
  
  watchdog("syllabus", "get,$course_id");
  
  $content_type = "application/plain";  // default, save as generic binary file.
  $temp = explode("\.", $filename);
  $ext = $temp[count($temp) - 1];  // get the original file extension.
  
  // attempt to match to the correct content_type...
  if ($ext == "pdf"){ $content_type = "application/pdf"; }
  if ($ext == "doc") { $content_type = "application/msword"; }
  if ($ext == "docx") { $content_type = "application/vnd.openxmlformats-officedocument.wordprocessingml.document"; }
  if ($ext == "txt") { $content_type = "text/plain"; }
  if ($ext == "pot") { $content_type = "application/mspowerpoint"; }
  if ($ext == "ppt") { $content_type = "application/powerpoint"; }
  if (strstr($ext,"xl")) { $content_type = "application/excel"; }
  
  
  
  
  $fn = urlencode($subject_id . "_" . $course_num . "_SAMPLE_SYLLABUS") .".$ext";  // make it a safe filename.
  $fn = str_replace("+"," ",$fn); // restore spaces from + symbols...
  
  // Give it to the browser!
  header('Content-type: ' . $content_type . '');
  header('Content-Disposition: attachment; filename="' . $fn . '"');
  readfile("$files_path/custom/files/syllabi/" . $filename . "");
  die;    
}



/**
 * Show the user their select of courses.
 */
function course_search_display_courses() {
  $rtn = "";
   
  fp_add_css(fp_get_module_path("course_search") . "/css/course_search_style.css");
  
  fp_set_title('');
  
  $mode = "";
  
  
  // We are going to be setting up a render array for this screen, so other modules can alter it later.
  $render = array();
  $render["#id"] = "course_search_display_courses";
      
  $school_id = intval(@$_REQUEST["school_id"]);

  
  $current_catalog_year = variable_get_for_school("current_catalog_year",'', $school_id);

  // catalog_year is always just whatever the current year is.
  $catalog_year = $current_catalog_year;  
  $subject_id = $_REQUEST["subject_id"];
  

  $render["#catalog_year"] = $catalog_year;
  $render["#school_id"] = $school_id; 
  $render["#subject_id"] = $subject_id;





  $clean_urls = variable_get("clean_urls", FALSE);
  
  // Try to find out the title to this subject, if one exists
  // in our subjects table.
  $res = db_query("SELECT * FROM subjects
                   WHERE subject_id =?
                   AND school_id = ? ", $subject_id, $school_id);
  $cur = db_fetch_array($res);
  $title = $cur["title"];
  if ($title == "") $title = strip_tags($subject_id);
  
  
  //$rtn .= t("Current catalog year:") . " <b>$catalog_year-" . ($catalog_year +1) . "</b>   
  //    ";
  
  if (module_enabled("schools")) {
    $render['selected_school_name'] = array(
      'value' => "<div class='current-school'>" . t("Current school: ") . "<strong>" . schools_get_school_name_for_id($school_id) . "</strong>
                     - " . l(t("Change?"), "tools/course-search") . "</div>",
    
    );
  }
      
  $render["current_cat_year"] = array(
    "value" => "<div class='current-cat-year-line'>" . t("Current catalog year:") . " <strong>$catalog_year-" . ($catalog_year +1) . "</strong></div>", 
  );
          
  
  $render["subject_title"] = array(
    "value" => "<div class='subject-title'><h2>$title</h2></div>",
  );
    
  // Draw the term selector.
  $html = "";
  $only_term = @strip_tags($_REQUEST["only_term"]);
  $html .= "<form id='term_form' action='" . fp_url("tools/course-search/courses") . "' method='GET'>           
           <input type='hidden' name='mode' value='$subject_id'>
           <input type='hidden' name='subject_id' value='$subject_id'>
           <input type='hidden' name='school_id' value='$school_id'>
           ";
  
  if (!$clean_urls) {
      // Hack for if clean URLs isn't enabled
      $html .= "<input type='hidden' name='q' value='tools/course-search/courses'>";
  }
             
  $html .= "           
           View courses offered:
           <select name='only_term' onChange='document.getElementById(\"term_form\").submit();'>
             <option value=''>Any term</option>
             ";
  
  $term_array = csv_to_array(variable_get_for_school("course_search_avail_term_id_suffix_order", '', $school_id));
  
  $schedule_text = "";
  
  for ($t = $catalog_year; $t <= $catalog_year + 4; $t++)
  {
    $html .= "<option value=''>---------------------</option>";
    foreach($term_array as $x)
    {
      $schedule_text .= "<td class='tenpt' align='center'>";
      $the_term_id = $t . $x;
      
      $temp_course = new Course();
      $temp_course->term_id = $the_term_id;
      $term_desc = $temp_course->get_term_description(false);
      
      $sel = "";
      if ($only_term != "" && $only_term == "$the_term_id") {
        $sel = " selected";
      }
      
      $html .= "<option value='$the_term_id' $sel>$term_desc</option> \n";     
    }   
    
  } 
  $html .= "
           </select>
         </form>";
  
  
  $render["term_selector_form"] = array(
    "value" => $html,
  );
  
  
  
  if ($only_term != "") {
    $temp_course = new Course();
    $temp_course->term_id = $only_term;
    $term_desc = $temp_course->get_term_description(false);

                
    $render["term_selected_only_term"] = array(
      "value" => "<div style='font-weight: bold; padding-bottom: 20px;'>
                 " . t("The following courses are currently scheduled to be offered during @termdesc", array("@termdesc" => $term_desc)) . "
                </div>",
     
    );            
            
  }
  
  $term_structures = get_term_structures($school_id);
    
  $grad_notice_flag = false;
  $temp_course = new Course();
  
  $result = db_query("SELECT * FROM courses
              WHERE catalog_year = ? 
              AND subject_id = ? 
              AND exclude = 0 
              AND delete_flag = 0
              AND school_id = ?
              ORDER BY course_num ", $catalog_year, $subject_id, $school_id);
  if ($result)
  {
    while ($cur = db_fetch_array($result))
    {
      $n_subject_id = trim($cur["subject_id"]);
      $n_course_num = trim($cur["course_num"]);
      $n_course_id = $cur["course_id"];
      $n_school_id = $cur['school_id'];
      $bool_hide = FALSE;
      
      $title = trim($cur["title"]);

      $title = $temp_course->fix_title($title);

      $description = trim($cur["description"]);
      if ($description == "") {
        $description = t("No description is available at this time.  Consult
              the official course catalog for listings.");
      }

      $syllabus_text = "";     
      $syllabus_array = course_search_get_course_syllabus_details($n_course_id);
      
      if (@$syllabus_array["url"] != "")
      {
        $syllabus_text = "<div class='course-search-sample-syllabus'>
                          <a href='{$syllabus_array["url"]}' class='nounderline'>
                 <i class='fa fa-file-text-o'></i> 
                  " . t("Sample Syllabus") . "</a>
                  
                </div>
                ";
      }

      // Look for all 5 years.
      $long_schedule_array = course_search_get_course_rotation_schedule($n_course_id, $catalog_year, 100, TRUE);
      
      $schedule_array = course_search_get_course_rotation_schedule($n_course_id, $catalog_year);  
      
      $full_schedule_array = course_search_get_course_rotation_schedule($n_course_id);
      $schedule_text = "";

      if (count($long_schedule_array) > 0) {
        $schedule_text .= "
              <div>
                <b>" . t("Anticipated availability:", array("@cat" => $catalog_year)) . "</b>
                ";
        $s_disp = "auto";        
        if ($mode != "advanced")
        { // only show this in the basic mode, not advanced.
          foreach ($schedule_array as $term_id)
          {
            
            $temp_course = new Course();
            $temp_course->term_id = $term_id;
            $schedule_text .= " " . $temp_course->get_term_description(true) . ",";
          }
          $schedule_text = substr($schedule_text, 0, -1); // take off comma.
          $rnd_div_id = sha1(rand(1,999999) . time());
          $schedule_text .= "
            &nbsp; | &nbsp;
            <a href='javascript: toggleHideDiv(\"$rnd_div_id\");' class='nounderline'>
              <span id='SPAN$rnd_div_id'>
                " . t("more&raquo;") . "
                </span></a> ";
          $s_disp = "none";
        }


        // Consult our settings to find out what order our terms should be in.
        $term_array = csv_to_array(variable_get_for_school("course_search_avail_term_id_suffix_order", '', $school_id));
       
        // Get our table headers
        $avail_headers = variable_get_for_school("course_search_avail_term_headers", '', $school_id);
        $avail_mobile_headers = variable_get_for_school("course_search_avail_term_mobile_headers", '', $school_id);
        
        
        $th = explode(",", $avail_headers);
        
        $twidth = "90%";
        $mleft = "20px;";
        
        $schedule_text .= "
              </div>
            <div id='$rnd_div_id' style='display: $s_disp; margin-left: $mleft;'>
            <table border='1' width='$twidth' class='fp-course-search-avail'>
              <tr>
               <td>" . t("Year") . "</td>
              ";
        foreach ($th as $header_text) {
          $schedule_text .= "<td>" . trim($header_text) . "</td>";
        }
        $schedule_text .= "      </tr>";
        
        for ($t = $catalog_year; $t <= $catalog_year + 4; $t++)
        {
          $schedule_text .= "<tr>
                    <td class='tenpt' align='center'>
                    <b>$t</b>
                    </td>";
          foreach($term_array as $x)
          {
            $schedule_text .= "<td class='tenpt' align='center'>";
            $the_term_id = $t . $x;

            // Does the term suffix ($x) call for the year to be
            // subtracted by 1, or modified at all?  This is the case at ULM for fall.
            // Ex:  201340  is Fall of *2012*, not 2013.
            // We can tell this because the term structure (from admin settings)            
            //fpm($term_structures);
            if (strtoupper($term_structures[$x]["disp_adjust"]) == "[Y-1]" || strtoupper($term_structures[$x]["disp_adjust"]) == "[Y4-1]") {
              // It is subtracted by one.  So the year for "XYZ of 2016" is actually recorded as 2017xyz                
              $the_term_id = ($t + 1) . $x;
            }            
            if (strtoupper($term_structures[$x]["disp_adjust"]) == "[Y+1]" || strtoupper($term_structures[$x]["disp_adjust"]) == "[Y4+1]") {
              // It is added by one.  So the year for "XYZ of 2016" is actually recorded as 2015xyz                              
              $the_term_id = ($t - 1) . $x;
            }
            
            
            
            
            if (in_array($the_term_id, $full_schedule_array))
            {              
              $schedule_text .= "<img src='" . fp_theme_location() . "/images/small_check.gif'>";             
            }
            else {
              if ($only_term != "" && $only_term == $the_term_id) {
                // Meaning, the term that the user selected is NOT in this 
                // course's schedule.  So, we should hide it.
                $bool_hide = TRUE;
              }
            }
            $schedule_text .= "&nbsp;</td>";

          }
          $schedule_text .= "</tr>";
        }


        $schedule_text .= "
            </table>
            </div>
                ";



      }
      else if ($only_term != "") {
        // This is if there are NO schedule offerings, yet the user
        // selected to view a particular term.
        $bool_hide = TRUE;
      }
      
            
      if (course_search_get_course_rotation_schedule_not_anticipated($n_course_id))
      {
        
        // This course has no anticipated offerings!
        $schedule_text = "<div><b>" . t("Anticipated availability:") . "</b>
              " . t("There are no anticipated course offerings
              at this time.") . "</div>";
        if ($only_term != "") $bool_hide = TRUE;
      }


      $min_hours = trim($cur["min_hours"]*1);
      $max_hours = trim($cur["max_hours"]*1);
      if ($min_hours == $max_hours)
      {
        $hours = $min_hours;
      } else {
        $hours = "$min_hours to $max_hours";
      }

      $repeat = "";
      if (trim($cur["repeat_hours"]*1) > $min_hours)
      {
        $repeat = "<div class='course-search-repeat'>" . t("May be repeated for up to @repeat hours of credit.", array("@repeat" => $cur["repeat_hours"]*1)) . "</div>";
        if (trim($cur["repeat_hours"]*1) > 20) {
          $repeat = "<div class='course-search-repeat'>" . t("May be repeated for credit.") . "</div>";
        }
      }
      
      
      // Draw it on screen...
      if ($bool_hide != true) {
        
  
        $details = $schedule_text . $syllabus_text;

        $hyp1 = " - ";
        $on_click = "";
        
        $html = "";
        
        // Note, the HTML comments are so other modules, that wish to manipulate this block, have something easy to find/replace
        
        $html .= "<div class='course-search-course-block'>
                 <!-- TITLE-ROW -->
                 <div class='course-search-course-title-row' 
                      $on_click>                       
                       <!-- COURSE-NAME -->
                       <span class='course-search-course-name'>$n_subject_id $n_course_num</span>
                        $hyp1
                        <!-- END-COURSE-NAME ->
                        <!-- COURSE-TITLE --> 
                        <span class='course-search-course-title'>$title</span> - $hours " . t("hrs.") . "$repeat
                        <!-- END-COURSE-TITLE --> 
                 </div>
                 <!-- END-TITLE-ROW -->
                 <!-- COURSE-EXTRA -->
                 <div class='course-search-course-extra'>
                   <!-- DESC -->
                   <div class='course-search-course-description'>$description</div>
                   <!-- END-DESC -->
                   <!-- DETAILS -->
                   <div class='course-search-course-details'>$details</div>
                   <!-- END-DETAILS -->
                 ";

        
        
                 
        $html .= "</div>
                  <!-- END-COURSE-EXTRA -->"; // div course-search-course-extra
                       
        $html .= "</div>"; // div course-search-course-block
        
        $render["course_search_course_block__$n_course_id"] = array(
          "value" => $html,
        );
                
        
      }
  
    }
  }


  watchdog("course_search", "User viewed courses in subject: @subject", array("@subject" => $subject_id));


  //$pC .= $screen->get_java_script_code();
  $html = '    
    <script type="text/javascript">
    function toggleHideDiv(rndDivID)
    {
      var d = document.getElementById(rndDivID);
      if (d.style.display == "none")
      {
        d.style.display = "";
        document.getElementById("SPAN" + rndDivID).innerHTML = "&laquo;less";
      } else {
        d.style.display = "none";
        document.getElementById("SPAN" + rndDivID).innerHTML = "more&raquo;";
      }
      
    }
    
    function toggleCourseExtra(e) {
      $(e).siblings(".course-search-course-extra").slideToggle("medium");
    }   
    
    </script>
  
      ';

  
  $render["extra_javascript"] = array(
    "value" => $html,
  );

  $rtn .= fp_render_content($render);



  // Let's set our breadcrumbs  
  $crumbs = array();
  $crumbs[] = array(
    'text' => 'Courses',
    'path' => 'tools/course-search',
  );
  fp_set_breadcrumbs($crumbs);    






  return $rtn;
}



function course_search_get_course_rotation_schedule_not_anticipated($course_id)
{
  $rtn = FALSE;
  
	// Returns TRUE if not is NOT ANTICIPATED.  False, if this
	// is a normal courses which has an offering, or a blank
	// offering.  This will
	// only return true if NOTA is set as a term for this course.
	$res = db_query("SELECT * FROM course_rotation_schedule
							WHERE course_id = '?'
							AND term_id = 'NOTA'
							", $course_id);
	if (db_num_rows($res) > 0) {
		$rtn = TRUE;
	}

  
  //////////////////////////////////////
  // Okay, now we invoke a hook, to see if any other modules
  // would like to add or alter our answer
  invoke_hook("course_search_get_course_rotation_schedule_not_anticipated", array(&$rtn, $course_id));    

	return $rtn;

}



function course_search_get_course_capacity($course_id, $term_id) {
  
  // Return from cache if we already have it.
  if (isset($GLOBALS['fp_cache_course_capacity'][$course_id])) {
    return $GLOBALS['fp_cache_course_capacity'][$course_id];
  }
  
  
  $cap = db_result(db_query("SELECT capacity FROM course_rotation_schedule
                             WHERE course_id = ?
                             AND term_id = ?", array($course_id, $term_id)));
                             
  $cap = intval($cap);
  $GLOBALS['fp_cache_course_capacity'][$course_id] = $cap;  // save to simple globals cache
  
  return $cap;
                             
}


function course_search_get_course_rotation_schedule($course_id, $year = "", $limit = 20, $bool_include_next_five_years = FALSE)
{
    
  // Has this already been saved to our globals cache?  If so, just return that.          
  if (isset($GLOBALS['cache_course_search_rotation_schedule'][$course_id][$year][$limit][intval($bool_include_next_five_years)])) {
    return $GLOBALS['cache_course_search_rotation_schedule'][$course_id][$year][$limit][intval($bool_include_next_five_years)];
  }        
        
      
  $year = intval($year);
  $limit = intval($limit);
   
  
  // return an array containing the terms that this course
	// is going to be offered, if any.
	$rtn_array = array();
	$arr = array();
	$year_line = "";
	if ($year != "")
	{ // if a year is entered, we will get the next few years, and the previous
	  // one for good measure.
		$year_line = "and (`term_id` LIKE '$year%' or `term_id` LIKE '" . ($year+1) . "%') ";
		if ($bool_include_next_five_years)
		{
			$yearm1 = $year - 1;
			$year2 = $year + 1;
			$year3 = $year + 2;
			$year4 = $year + 3;
			$year5 = $year + 4;
			$year6 = $year + 5;

			$year_line = "and (`term_id` LIKE '$year%'
							or `term_id` LIKE '$yearm1%'
							or `term_id` LIKE '$year2%'
							or `term_id` LIKE '$year3%'
							or `term_id` LIKE '$year4%'
							or `term_id` LIKE '$year5%'
							or `term_id` LIKE '$year6%'
					) ";
		}

	}

	$res = db_query("SELECT * FROM course_rotation_schedule
							WHERE `course_id`= ?
							$year_line
							ORDER BY term_id DESC
							LIMIT $limit", $course_id);
	while($cur = db_fetch_array($res))
	{
		$t = $cur["term_id"];
		// Get the term from the end.
		$ss = trim(substr($t,4,1));
		if ($ss == "m"){$ss = "1.5";}
		
    if (is_numeric($ss)) {
		  $ss = $ss * 10;
    }
    
		$year = trim(substr($t,0,4));

		// We do all this so we can establish an order to the terms
		// by using a sort() command later.
		$arr[] = $year . "~" . $ss . "~" . $t;
	}

	sort($arr);
	// Now we want to get out JUST the terms...
	foreach($arr as $line)
	{
		$temp = explode("~",$line);
		$rtn_array[] = trim($temp[2]);
	}

	
  //////////////////////////////////////
  // Okay, now we invoke a hook, to see if any other modules
  // would like to add or alter our rotation schedule (notice $rtn_array is passed by reference)
  invoke_hook("course_search_get_course_rotation_schedule", array(&$rtn_array, $course_id, $year, $limit, $bool_include_next_five_years));  
	

	// Save to globals cache to make it faster lookup
	$GLOBALS['cache_course_search_rotation_schedule'][$course_id][$year][$limit][intval($bool_include_next_five_years)] = $rtn_array;
	
	
	return $rtn_array;
}



function course_search_get_course_syllabus_details($course_id)
{
  
	// This will return an array containing information
	// about a course's syllabus, if it exists.
	$rtn_array = FALSE;

	// Does this course have a syllabus?
	  $query = "SELECT * FROM course_syllabi
				WHERE course_id = ? ";
	
	$res = db_query($query, $course_id);
	$cur = db_fetch_array($res);
	
	

	if (isset($cur["filename"]) && $cur['filename'] != "") {
	  $rtn_array = array();
		$rtn_array["url"] = $GLOBALS["fp_system_settings"]["base_url"] . "/" . fp_url("course-search/get-syllabus", "id=" . $course_id, FALSE);
		$rtn_array["filename"] = $cur["filename"];
		$rtn_array["posted"] = $cur["posted"];
	}


	return $rtn_array;

}



function course_search_select_school_form() {
  $form = array();
  
  $options = schools_get_schools_for_fapi(TRUE, FALSE); // we don't need special permissions to view.
  $form['school_id'] = array(
    'type' => 'select',
    'label' => t('Please begin by selecting a school:'),
    'options' => $options,        
    'value' => @$_REQUEST['school_id'],
    'hide_please_select' => TRUE,
    'required' => TRUE,    
  );
  
  $form['submit_btn'] = array(
    'type' => 'submit',
    'value' => t("Continue"),
  );
  
  return $form;
}


function course_search_select_school_form_submit($form, $form_state) {
  $values = $form_state['values'];
  fp_goto('tools/course-search', 'school_id=' . $values['school_id']);
}


/**
 * Displays the search pulldown for the user to use to find courses.
 */
function course_search_display_search() {
    
   
  fp_add_css(fp_get_module_path("course_search") . "/css/course_search_style.css");
  
  
   // We are going to be setting up a render array for this screen, so other modules can alter it later.
  $render = array();
  $render["#id"] = "course_search_display_search";
      
  $school_id = 0;
  
  if (module_enabled("schools")) {  // The schools module is enabled.  We need to first ask what school we want to look at. 
    if (!isset($_REQUEST['school_id'])) {
      
      $rtn .= fp_render_form('course_search_select_school_form');      
      return $rtn;
    } // not isset school_id
    $school_id = intval($_REQUEST['school_id']);
    $render['current_school'] = array(
      'value' => "<div class='current-school'>" . t("Current school: ") . "<strong>" . schools_get_school_name_for_id($school_id) . "</strong>
                     - " . l(t("Change?"), "tools/course-search") . "</div>",
      
      'weight' => 0,
    );
  }
  
  $clean_urls = variable_get("clean_urls", FALSE);
  
  $school_id = intval(@$_REQUEST['school_id']);
  $current_catalog_year = variable_get_for_school('current_catalog_year', 2006, $school_id);
  // catalog_year is always just whatever the current year is.
  $catalog_year = $current_catalog_year;
  
  $render['#school_id'] = $school_id;
  $render['#catalog_year'] = $catalog_year;
    
  
  if (user_has_permission("can_update_course_info_details")) {
    $html = "<div>" . t("Administrators:") . " " . l("<i class='fa fa-pencil'></i> " . t("Edit course schedules, capacity, and syllabi"), "tools/course-search/edit-list", "school_id=$school_id") . "</div>";
    $render['edit_course_schedules'] = array(
      'value' => $html,
      'weight' => 100,
    );
  }  
  
  
    // Catalog year has been selected.

  $html = "<div class='current-cat-year-line'>" . t("Current catalog year: <strong>@cat</strong></div>", array('@cat' => "$catalog_year-" . ($catalog_year +1)));
  $render['current_catalog_line'] = array(
    'value' => $html,
    'weight' => 200,
  );
  
  $html = "";    
  $html .= "<br><br>
    <label>Please select an available subject from the list below.</label>       
    
    <form action='" . fp_url("tools/course-search/courses") . "' method='GET' name='mainform' id='myform'>
    <input type='hidden' name='school_id' value='$school_id'> ";
    
  
  if (!$clean_urls) {
    // Hack for if clean URLs isn't enabled
    $html .= "<input type='hidden' name='q' value='tools/course-search/courses'>";
  }
  

  $html .= "
    <div id='element-inner-wrapper-course-search-subject' class='form-element element-type-select '>
      <select class='course-search-subject' name='subject_id'>
    ";    

 
  
  // We want to make a pull-down list of all available subjects.
  // Keep in mind with this join-- we may have courses who have
  // a subject_id, for which we don't have that subject in the subjects
  // table.
 
  
  $query = "SELECT DISTINCT b.subject_id, a.title FROM courses b LEFT JOIN subjects a
            ON (a.subject_id = b.subject_id)
            WHERE exclude = 0
            AND catalog_year = ?
            AND a.school_id = b.school_id
            AND b.school_id = ?
            ";
  
  $subjects = array();
  $result = db_query($query, $catalog_year, $school_id);
  while ($cur = db_fetch_array($result))
  {      
    //fpm($cur);
    $title = trim($cur["title"]);
    $subject_id = trim($cur["subject_id"]);
    
    if ($title == "") {
      $title = $subject_id;
    }
    
    $subjects[$subject_id] = $title;
  }
  
  asort($subjects);
  
  foreach ($subjects as $subject_id => $title) {
    
    $html .= "<option value='$subject_id'>$title ($subject_id)</option>";
    
    
    
  }


  $html .= " </select>       
          </div>
      
      <div class='course-search-buttons buttons form-element element-type-submit'>
        <input type='submit' value='Select'>
      </div>    
  
    </form>";
  
  $render['selection_form'] = array(
    'value' => $html,
    'weight' => 300,
  );
  

  $rtn = fp_render_content($render);
  
  return $rtn;
}