<?php
/**
 * @file
 * module file for Alerts
*/


// Define a constant for a "system-generated" alert
define('ALERT_SYSTEM_USER_ID', -99);




function alerts_menu() {
  $items = array();
  
  $items["alerts"] = array(
    "title" => "Alerts%ALERTS_ADVISEE_ALERTS_COUNT%", 
    "page_callback" => "fp_render_form",
    "page_arguments" => array("alerts_advisees_alerts_form"),
    "access_arguments" => array("view_advisee_alerts"),
    "tab_family" => "alerts",
    "weight" => 10,
    "type" => MENU_TYPE_TAB,
    "page_settings" => array(    
      "menu_links" => array(         
        0 => array(
          "text" => "Dashboard",
          "path" => "main",          
        ),
      ),
    ),    
  );  
  
  
  $items["advisee-activities"] = array(
    "title" => "Advisee Activities",
    "page_callback" => "alerts_display_advisee_activities_page",
    "access_arguments" => array('can_view_advisee_activity_records'),
    "type" => MENU_TYPE_TAB,
    'tab_family' => 'alerts',
    'weight' => 20,
    "page_settings" => array(
      "menu_links" => array(         
        0 => array(
          "text" => "Dashboard",
          "path" => "main",          
        ),
      ),
    ),
  );
    
    
  // Settings screen
  $items["admin/config/alerts-settings"] = array(
    "title" => "Alerts settings",                                                
    "description" => "Configure settings for Alerts in the system",
    "page_callback" => "fp_render_form",
    "page_arguments" => array("alerts_settings_form", "system_settings"),
    "access_arguments" => array("administer_alerts"),
    "page_settings" => array(                                        
      "page_hide_report_error" => TRUE,
      "menu_links" => array(                    
        0 => array(                                               
          "text" => "Admin Console",                   
          "path" => "admin-tools/admin",                                                           
        ),                                                                         
      ),
      "menu_icon" => fp_get_module_path('system') . "/icons/bell.png",                                                               
    ),    
    "type" => MENU_TYPE_NORMAL_ITEM,            
    "tab_parent" => "admin-tools/admin",    
  );
    
  
  
  return $items;
}


function alerts_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 Alerts settings", array('%school' => $school_name)));
    if ($school_id !== 0) {
      $fs = "~~school_" . $school_id;
    }
  }
  
  $form['school_id'] = array(
    'type' => 'hidden',
    'value' => $school_id,
  );  
  
  
  $form['alerts_tags' . $fs] = array(
    'label' => t("Tags"),
    'type' => 'textarea',
    'value' => variable_get_for_school("alerts_tags", "", $school_id, TRUE),
    'description' => t("These are tags wich may be selected when creating a new Alert.
                        Enter tags one per line.  For example: 
                        <br> &nbsp; Academics<br> &nbsp; Financial Aid<br> &nbsp; English"),
    
  );
    
    
  
  return $form;
}







/**
 * implements hook_menu_handle_replacement_pattern
 */
function alerts_menu_handle_replacement_pattern($str) {
      
  if (strstr($str, "%ALERTS_ADVISEE_ALERTS_COUNT%")) {
    // Get our count.
    $alert_counts = fp_get_alert_count_by_type();        
    $c = intval($alert_counts['alerts']['alert']['unread']);
    
    $x = "";
    if ($c > 0) {
      $x .= " ($c)";
    }  
    
    $str = str_replace("%ALERTS_ADVISEE_ALERTS_COUNT%", $x, $str);
  }    
  
  return $str;
}




/**
 * Implements hook_get_count_for_alert_type
 * 
 * Set and Return back "unread" (not in content_last_access)
 * 
 */
function alerts_get_alert_count_by_type($account = NULL) {
  global $user;
  if ($account === NULL) $account = $user;
  
  if ($account->id == 0) return FALSE;
  
  $rtn = array();
  $types = array('alert'); 
  
  // We need to know this user's list of advisees.
  $advisees = advise_get_advisees($account->cwid);
  $advisee_line = "";
  if ($advisees && count($advisees) > 0) {
    
    $advisees_list = "'" . join("','", $advisees) . "'";
    
    $advisee_line = " AND b.field__student_id IN (" . $advisees_list . ") ";
  }
  else {
    $advisee_line = " AND b.field__student_id IN ('') ";  // Meaning, no advisees.  We do this so as not to break the queries and return back ALL alerts.
  }
  
  // If you have no advisees, that's OK, because you might have alerts which are targetting you.  
  $total_count = $read_count = 0;  
  foreach ($types as $type) {
        
    $total_count = intval(db_result(db_query("SELECT COUNT(*) as mycount 
                      FROM content__$type b,                                            
                           content n
                     WHERE n.type = ?
                     AND n.published = 1
                     AND n.delete_flag = 0
                     AND b.vid = n.vid
                     AND b.cid = n.cid
                     AND b.field__exclude_advisor != 1
                     $advisee_line ", array($type)))); 
    
    
    // Also search for alerts which are targeting the account user.
    $total_count += intval(db_result(db_query("SELECT COUNT(*) as mycount 
                      FROM content__$type b,                                            
                           content n
                     WHERE n.type = ?
                     AND n.published = 1
                     AND n.delete_flag = 0
                     AND b.vid = n.vid
                     AND b.cid = n.cid
                     AND b.field__target_faculty_id = ?
                      ", array($type, $account->cwid))));     
    
    
    ////////////////////////
    // Get Read count for alerts
    
    
    
    $read_count = intval(db_result(db_query("SELECT COUNT(*) as mycount 
                      FROM content_last_access a,
                           content__$type b,                                            
                           content n
                     WHERE n.type = ?
                     AND n.published = 1
                     AND n.delete_flag = 0
                     AND n.cid = a.cid                     
                     AND b.vid = n.vid
                     AND n.cid = b.cid
                     AND b.field__exclude_advisor != 1
                     $advisee_line
                     AND a.user_id = ?", array($type, $account->id))));
    
    
    // Also search for read alerts which are targeting the account user.
    $read_count += intval(db_result(db_query("SELECT COUNT(*) as mycount 
                      FROM content_last_access a,
                           content__$type b,                                            
                           content n
                     WHERE n.type = ?
                     AND n.published = 1
                     AND n.delete_flag = 0
                     AND n.cid = a.cid                     
                     AND b.vid = n.vid
                     AND n.cid = b.cid
                     AND b.field__target_faculty_id = ?                     
                     AND a.user_id = ?", array($type, $account->cwid, $account->id))));
        
    
    
    $rtn[$type]['total'] = $total_count;
    $rtn[$type]['read'] = $read_count;
    $rtn[$type]['unread'] = $total_count - $read_count; 
        
        
    // TODO:  A setting such that "read" is actually "closed" and "unread" means "open".    
        
        
  } // foreach types 
  
  return $rtn;
  
} // alerts_get_alert_count_by_type





/**
 * Display all advisee activities since the beginning of time, thanks to pager query.
 * 
 *  
 *  
 */
function alerts_display_advisee_activities_page() {
  global $user;
  $rtn = "";
  
  fp_add_css(fp_get_module_path('alerts') . '/css/style.css');
  
  fp_set_title('');
  
  // Needs to only be within my advisees list....
  $student_ids = advise_get_advisees($user->cwid); 
  $students_line = "''";
  if ($student_ids && count($student_ids) > 0) {
    $students_line = "'" . join("','", $student_ids) . "'";
  }
  
  $icons = array(
    'alert' => 'fa-bell-o',
    'mail' => 'fa-envelope-o',
    'comment' => 'fa-comment-o',
    'calendar' => 'fa-calendar-o',
  );
             
  if ($students_line) {
    $students_line = " AND field__student_id IN ($students_line) ";
  }
 
  $table_headers = array();
 
  $table_headers[] = array("label" => "Type", "field" => "field__activity_type");
  $table_headers[] = array("label" => "Student");
  $table_headers[] = array("label" => "Description", "field" => "title");  
    
  $table_headers[] = array("label" => "Posted", "field" => "n.updated");
  
    // Set our initial sort, if none is already set.   
  theme_table_header_sortable_set_initial_sort('n.updated', 'DESC');
  
  
  $rtn .= "<table border='0' class='advisees-alerts'>";
  // Draw our our table headers, with links....
  $rtn .= theme_table_header_sortable($table_headers);  
  // Get our order by clause based on selected table header, if any.    
  $order_by = theme_table_header_sortable_order_by($table_headers);  
  
  $filter_line = "";
  $filter_params = array();
  $limit = 20;
  
  
  // Now, we are going to search for alerts about these students, in the form of a pager query.
  // Query for alerts for this student.  We will be using a pager_query, so we can display a complete history, if we wish.
  $res = pager_query("SELECT DISTINCT(a.cid) FROM content__activity_record a, content n
                     WHERE a.vid = n.vid
                     AND a.cid = n.cid
                     AND n.delete_flag = 0
                     AND n.published = 1
                     $students_line
                     $filter_line                                  
                     $order_by", $filter_params, $limit, 0, "SELECT COUNT(DISTINCT(a.cid)) FROM content__activity_record a, content n
                                                               WHERE a.vid = n.vid
                                                               AND a.cid = n.cid
                                                               AND n.delete_flag = 0
                                                               AND n.published = 1
                                                               $students_line
                                                               $filter_line
                                                               $order_by");  
    
      
      
      
       
  while ($cur = db_fetch_object($res)) {
    $cid = $cur->cid;      
    $content = content_load($cid);
    
    $student_name = fp_get_student_name($content->field__student_id['value'], TRUE);
                  
    $disp_date = date("m/d/Y g:ia", convert_time($content->updated));
    
    $icon = $icons[$content->field__activity_type['value']];
    
    $rtn .= "
      <tr>
        <td class='type'><i class='fa $icon'></i></td>
        <td class='student'>$student_name</td>             
        <td class='short-desc'><div class='short-desc-wrapper'>{$content->title}</div></td>
        <td class='updated'>$disp_date</td>
      </tr>
    ";
  } // while cur

  
  $rtn .= "</table>";
  
  $rtn .= theme_pager(array(t('« newest'), t('‹ newer'), '', t('older ›'), t('oldest »')));
      
  
  
  
  return $rtn;
} // alerts_display_advisee_activities_page






/**
 * Displays alerts for our various advisees.
 */
function alerts_advisees_alerts_form($only_student_id = "", $limit = 25) {
  global $user;  
  $html = "";
  $form = array();
  
  
  fp_set_title('');
    
  fp_add_css(fp_get_module_path('alerts') . '/css/style.css');
  
  $students_line = "'$only_student_id'";
  
  if ($only_student_id == "") {  
    $student_ids = advise_get_advisees($user->cwid);    
    if ($student_ids && count($student_ids) > 0) {
      $students_line = "'" . join("','", $student_ids) . "'";
    }
  }
  
  
  $filter_status = @trim($_SESSION['alerts_filter_status']);
  $filter_line = "";
  $filter_params = array();
  
  $filter_params[':faculty_id'] = $user->cwid;
  
  if ($filter_status) {
    $filter_line = "AND field__alert_status = :status";
    $filter_params[":status"] = $filter_status;
  }
  
  // filter options form.  Ex:  Status
  $form['filter_status'] = array(
    'label' => t('Filter by:'),
    'type' => 'select',
    'options' => array('open' => 'Open', 'closed' => 'Closed'),
    'value' => $filter_status,
  );
  
  $form['submit_btn'] = array(
    'type' => 'submit',
    'value' => t('Submit'),
  );
  
  
  
  $table_headers = array();
  $table_headers[] = array("label" => t("Actions"));  
  $table_headers[] = array("label" => t("Status"), "field" => "field__alert_status");
  if (!$only_student_id) {  
    $table_headers[] = array("label" => t("Student"));
  }  
  $table_headers[] = array("label" => t("To Faculty/Staff"));  
  $table_headers[] = array("label" => t("Short Description"));  
  $table_headers[] = array("label" => t("Author"));  
  $table_headers[] = array("label" => t("Updated"), "field" => "n.updated");
  
  // Set our initial sort, if none is already set.   
  theme_table_header_sortable_set_initial_sort('n.updated', 'DESC');
  
  
  $html .= "<table border='0' class='advisees-alerts'>";
  // Draw our our table headers, with links....
  $html .= theme_table_header_sortable($table_headers);  
  // Get our order by clause based on selected table header, if any.    
  $order_by = theme_table_header_sortable_order_by($table_headers);  
              
  
  // Now, we are going to search for alerts about these students, in the form of a pager query.
  // Query for alerts for this student.  We will be using a pager_query, so we can display a complete history, if we wish.
  $res = pager_query("SELECT DISTINCT(a.cid) FROM content__alert a, content n
                   WHERE 
                    (
                      (field__student_id IN ($students_line) AND a.field__exclude_advisor != 1)
                         OR
                      (field__target_faculty_id = :faculty_id)
                    ) 
                   AND a.vid = n.vid
                   AND a.cid = n.cid
                   AND n.delete_flag = 0
                   AND n.published = 1  
                   $filter_line                                  
                   $order_by", $filter_params, $limit, 0, "SELECT COUNT(DISTINCT(a.cid)) FROM content__alert a, content n
                                                                                                         WHERE 
                                                                                                          (
                                                                                                            (field__student_id IN ($students_line) AND a.field__exclude_advisor != 1)
                                                                                                               OR
                                                                                                            (field__target_faculty_id = :faculty_id)
                                                                                                          ) 
                                                                                                         AND a.vid = n.vid
                                                                                                         AND a.cid = n.cid
                                                                                                         AND n.delete_flag = 0
                                                                                                         AND n.published = 1
                                                                                                         $filter_line
                                                                                                         $order_by");  

  while ($cur = db_fetch_object($res)) {
    $cid = $cur->cid;
    $content = content_load($cid);
        
    $updated = format_date($content->updated, 'short');
    $author = "System";
    if ($content->user_id != ALERT_SYSTEM_USER_ID) {
      $tuser = fp_load_user($content->user_id);
      $author = fp_get_faculty_name($tuser->cwid);
    }
    
    $bool_no_student = TRUE;
    $student_id = $content->field__student_id['value'];
    $faculty_id = $content->field__target_faculty_id['value'];
    $student_name = t("N/A");
    if ($student_id) {
      $bool_no_student = FALSE;
      $student_name = fp_get_student_name($student_id, TRUE);
    }
    $faculty_name = t("- Advisor -");
    if ($faculty_id) {
      $faculty_name = fp_get_faculty_name($faculty_id);
    }    
        
        
        
    $extra_class = "";
    // If this content hasn't been read by this user, mark as "unread"
    if (!content_get_last_access($cid)) {
      $extra_class .= " unread";
    }    
    
    $student_url = fp_url('student-profile', "current_student_id=$student_id");
    $view_url = fp_url("content/$cid", "window_mode=popup&content_tabs=false");
    $dtitle = t("View Alert");
    $view_link = "<a href='javascript:fpOpenLargeIframeDialog(\"$view_url\",\"$dtitle\");' title='" . t("View") . "' class='action-link' ><i class='fa fa-eye'></i></a>";    

    $student_profile_link = "<a href='$student_url' title='" . t("Student Profile") . "' class='action-link'><i class='fa fa-user'></i></a>";
    if ($only_student_id || $bool_no_student == TRUE) $student_profile_link = "";    
    
      
    $edit_link = "";    
    if (user_has_permission('can_edit_alerts')) {
      $edit_url = fp_url("content/$cid/edit", "window_mode=popup&content_tabs=false");
      $dtitle = t("Edit Alert");
      $edit_link = "<a href='javascript:fpOpenLargeIframeDialog(\"$edit_url\",\"$dtitle\");' title='" . t("Edit") . "' class='action-link'><i class='fa fa-pencil'></i></a>";
    }    
        
    $remove_link = "";
    if (user_has_permission('can_remove_alerts')) {
      // Load dialog with a custom "remove" screen.  Either "Yes" or "Cancel".  If we hit yes, we redirect to wherever we are supposed to, just as if we saved.  Cancel closes
      // the dialog window.
      $remove_url = fp_url("content/$cid/remove", "window_mode=popup&content_tabs=false&type=alert");
      $dtitle = t("Remove Alert");
      $remove_link = "<a href='javascript:fpOpenLargeIframeDialog(\"$remove_url\",\"$dtitle\");' title='" . t("Remove") . "' class='action-link action-link-remove'><i class='fa fa-remove'></i></a>";
      
             
    }
    
        
        
    $html .= "
      <tr class='{$content->field__alert_status['value']} $extra_class'>
        <td class='actions'>$view_link $edit_link $remove_link $student_profile_link</td>
        <td class='status'>{$content->field__alert_status['display_value']}</td>
        ";
        if ($only_student_id == "") {
          $html .= "<td class='student'>$student_name</td>";
        }
     $html .= "        
        <td class='faculty'>$faculty_name</td>
        <td class='short-desc'><div class='short-desc-wrapper'>{$content->title}</div></td>
        <td class='author'>$author</td>
        <td class='updated'>$updated</td>
      </tr>
    ";
  } // while cur

  
  $html .= "</table>";
  
  $html .= theme_pager(array(t('« newest'), t('‹ newer'), '', t('older ›'), t('oldest »')));
    
  
  
  $form['mark_table'] = array(
    'type' => 'markup',
    'value' => $html,
  );
  
  
  
  
  return $form;
} // alerts_advisees_alerts_form



/**
 * Our main goal with this submit handler is just to place our filter values
 * into a session variable, so we can remember them later.
 */
function alerts_advisees_alerts_form_submit($form, $form_state) {
    
  $filter_status = @trim($form_state['values']['filter_status']);
  $_SESSION['alerts_filter_status'] = $filter_status;
  
}






/**
 * For use with the content module.  We will register our custom content type(s)
 * for use with this module.
 */
function alerts_content_register_content_type() {
  global $current_student_id;
  $school_id = db_get_school_id_for_student_id($current_student_id);    
    
  
  $arr = array();
  
  $arr['alert'] = array(
    'title' => 'Alert',
    'description' => 'Signal an alert, notification, or issue to be resolved for a student.',
    'settings' => array(
      'title' => array(
        'label' => t('Title / Short Description'),    
        'weight' => 15,    
      ),
    ),
  );
  

  $arr['activity_record'] = array(
    'title' => 'Activity Record',
    'description' => 'This is generally created directly by FlightPath, and is a note that some activity has occured which, while not an alert, should be
                        brought to the advisors attention.  For example, the student sent a text message, or opened an email.',
    'settings' => array(
      'title' => array(
        'label' => t('Title / Short Description'),    
        'weight' => 15,    
      ),
    ),
  );

  
  
  
  // If we are in a popup (dialog)...
  if (@$_GET['window_mode'] == 'popup') {
    // We want to make sure we redirect to our handler URL, which will close the dialog.
    $arr['alert']['settings']['#redirect'] = array(
      'path' => 'content-dialog-handle-after-save',
      'query' => '',        
    );

    // We want to make sure we redirect to our handler URL, which will close the dialog.
    $arr['activity_record']['settings']['#redirect'] = array(
      'path' => 'content-dialog-handle-after-save',
      'query' => '',        
    );

    
  }
  
  
  
  
  $fields = array();

  $fields['student_id'] = array(
    'type' => 'textfield',
    'label' => 'Student',
    'weight' => 10,
  );

  $fields['target_faculty_id'] = array(
    'type' => 'hidden',
    'value' => '', 
  );

  $fields['exclude_advisor'] = array(
    'type' => 'hidden',
    'value' => "0",
  );


      
  $fields['alert_status'] = array(
    'type' => 'select',
    'label' => 'Status',
    'options' => array(
      'open' => t('Open'),
      'closed' => t('Closed'),
    ),
    'required' => TRUE,
    'hide_please_select' => TRUE,
    'weight' => 40,
  );

  
    
  $options = csv_to_form_api_array(variable_get_for_school('alerts_tags', '', $school_id), "\n");
  $fields['tags'] = array(
    'type' => 'checkboxes',
    'options' => $options,
    'label' => 'Tags',
    'weight' => 60,
  );  

    
  $fields['alert_msg'] = array(
    'type' => 'textarea_editor',  
    'label' => 'Message',
    'filter' => 'basic',
    'weight' => 70,    
  );

  
  
  $fields['visibility'] = array(
    'type' => 'radios',  
    'label' => 'Visible to:',
    'options' => array('public' => 'Anyone (incl. student)', 'faculty' => 'Faculty/Staff only'),   
    'weight' => 80,    
  );
    
  $arr['alert']['fields'] = $fields;
  

  ///////////////////////////////////
  $fields = array();

  $fields['student_id'] = array(
    'type' => 'textfield',
    'label' => 'Student',
    'weight' => 10,
  );

  $fields['faculty_id'] = array(
    'type' => 'textfield',
    'label' => 'Faculty',
    'weight' => 15,
    'description' => 'optional',
  );

      
  $fields['activity_type'] = array(
    'type' => 'select',
    'label' => 'Activity Type (sets the icon)',
    'options' => array(
      'alert' => t('Alert - Bell'),
      'mail' => t('Mail - Envelope'),
      'comment' => t('Comment - txt message'),
      'calendar' => t('Calendar - appointment related'),
    ),
    'required' => TRUE,
    'hide_please_select' => TRUE,
    'weight' => 40,
  );


  $arr['activity_record']['fields'] = $fields;
      
  
  
  
  
      
  
  return $arr;
  
} // hook_content_register_content_type



function alerts_form_alter(&$form, $form_id) {
  
if ($form_id == 'content_edit_content_form') {
    if (@$form['type']['value'] == 'alert') {

      fp_add_css(fp_get_module_path('alerts') . '/css/style.css');      
        
      $db = get_global_database_handler();
      
      // If this is a NEW form, then check for values in the URL to auto-fill.      
      if ($form['cid']['value'] === 'new') {
        
        if (isset($_GET['student_id'])) {
          $form['student_id']['value'] = $_GET['student_id'];
          
          $form['student_id']['attributes'] = array('class' => 'hidden');
          $extra_mark = "";
          
          if ($form['student_id']['value'] != "") {
            $form['mark_to'] = array(
              'type' => 'markup',
              'value' => "<div class='alert-field-mark alert-student'>
                                 " . $db->get_student_name($form['student_id']['value'], TRUE) . "<span class='alert-student-extra-mark'>$extra_mark</span>
                          </div>",
              'weight' => $form['student_id']['weight'], 
            );          
          }
          
        } // if _GET[student_id]
      } // if "new"
      else {
        // This is NOT new!  We display display the student information and hide the field.
                
        $form['student_id']['attributes'] = array('class' => 'hidden');
        $extra_mark = "";
        if ($form['student_id']['value'] != "") {
          $form['mark_to'] = array(
            'type' => 'markup',
            'value' => "<div class='alert-field-mark alert-student'>
                               " . $db->get_student_name($form['student_id']['value'], TRUE) . "<span class='alert-student-extra-mark'>$extra_mark</span>
                        </div>",
            'weight' => $form['student_id']['weight'], 
          );
                
        }
        
      }
      
    } // if type == alert
  } // if form_id   
  
  
} // hook_form_alter








function alerts_perm() {
  return array(
    'administer_alerts' => array(
      'title' => t('Administer Alerts Settings'),
      'description' => t('The user may configure various settings involving Alerts in the system.'),      
    ),
    'can_view_alerts' => array(
      'title' => t('Can view Alerts'),
      'description' => t('The user may view alerts (only "Anyone" by default)'),      
    ),
    'can_edit_alerts' => array(
      'title' => t("Can edit Alerts"),
      'description' => t("The user is allowed to change the status (open/closed), comments, etc. of alerts.  Give this
                          to users who will be directly responsible for responding to alerts."),
    ),
    'can_remove_alerts' => array(
      'title' => t("Can remove Alerts"),
      'description' => t("The user is allowed to 'remove' an alert, effectively deleting it.  It will no longer be available
                          in reports."),
    ),    
    'can_view_faculty_alerts' => array(
      'title' => t('View "Faculty/Staff" Alerts'),
      'description' => t('The user is allowed to view alerts marked visible for "Faculty/Staff".'),      
    ),
    'view_advisee_alerts' => array(
      'title' => t('View Advisee Alerts'),
      'description' => t('The user may view alerts from all of their advisees.  Only give to faculty/staff users.'),
    ),
    'can_view_advisee_activity_records' => array(
      'title' => t('View Activity Records for advisees'),
      'description' => t('The user is allowed to view activity records for their advisees.  Give to users who would have such advisees.'),      
    ),    
    
  );
}