user/filters/lib.php

   1 <?php
   2
   3 require_once($CFG->dirroot.'/user/filters/text.php');
   4 require_once($CFG->dirroot.'/user/filters/date.php');
   5 require_once($CFG->dirroot.'/user/filters/select.php');
   6 require_once($CFG->dirroot.'/user/filters/simpleselect.php');
   7 require_once($CFG->dirroot.'/user/filters/courserole.php');
   8 require_once($CFG->dirroot.'/user/filters/globalrole.php');
   9 require_once($CFG->dirroot.'/user/filters/profilefield.php');
  10 require_once($CFG->dirroot.'/user/filters/yesno.php');
  11 require_once($CFG->dirroot.'/user/filters/cohort.php');
  12 require_once($CFG->dirroot.'/user/filters/user_filter_forms.php');
  13 require_once($CFG->dirroot.'/user/filters/checkbox.php');
  14
  15 /**
  16  * User filtering wrapper class.
  17  */
  18 class user_filtering {
  19     var $_fields;
  20     var $_addform;
  21     var $_activeform;
  22
  23     /**
  24      * Contructor
  25      * @param array array of visible user fields
  26      * @param string base url used for submission/return, null if the same of current page
  27      * @param array extra page parameters
  28      */
  29     function user_filtering($fieldnames=null, $baseurl=null, $extraparams=null) {
  30         global $SESSION;
  31
  32         if (!isset($SESSION->user_filtering)) {
  33             $SESSION->user_filtering = array();
  34         }
  35
  36         if (empty($fieldnames)) {
  37             $fieldnames = array('realname'=>0, 'lastname'=>1, 'firstname'=>1, 'email'=>1, 'city'=>1, 'country'=>1,
  38                                 'confirmed'=>1, 'profile'=>1, 'courserole'=>1, 'systemrole'=>1, 'cohort'=>1,
  39                                 'firstaccess'=>1, 'lastaccess'=>1, 'neveraccessed'=>1, 'timemodified'=>1,
  40                                 'nevermodified'=>1, 'username'=>1, 'auth'=>1, 'mnethostid'=>1);
  41         }
  42
  43         $this->_fields  = array();
  44
  45         foreach ($fieldnames as $fieldname=>$advanced) {
  46             if ($field = $this->get_field($fieldname, $advanced)) {
  47                 $this->_fields[$fieldname] = $field;
  48             }
  49         }
  50
  51         // fist the new filter form
  52         $this->_addform = new user_add_filter_form($baseurl, array('fields'=>$this->_fields, 'extraparams'=>$extraparams));
  53         if ($adddata = $this->_addform->get_data()) {
  54             foreach($this->_fields as $fname=>$field) {
  55                 $data = $field->check_data($adddata);
  56                 if ($data === false) {
  57                     continue; // nothing new
  58                 }
  59                 if (!array_key_exists($fname, $SESSION->user_filtering)) {
  60                     $SESSION->user_filtering[$fname] = array();
  61                 }
  62                 $SESSION->user_filtering[$fname][] = $data;
  63             }
  64             // clear the form
  65             $_POST = array();
  66             $this->_addform = new user_add_filter_form($baseurl, array('fields'=>$this->_fields, 'extraparams'=>$extraparams));
  67         }
  68
  69         // now the active filters
  70         $this->_activeform = new user_active_filter_form($baseurl, array('fields'=>$this->_fields, 'extraparams'=>$extraparams));
  71         if ($adddata = $this->_activeform->get_data()) {
  72             if (!empty($adddata->removeall)) {
  73                 $SESSION->user_filtering = array();
  74
  75             } else if (!empty($adddata->removeselected) and !empty($adddata->filter)) {
  76                 foreach($adddata->filter as $fname=>$instances) {
  77                     foreach ($instances as $i=>$val) {
  78                         if (empty($val)) {
  79                             continue;
  80                         }
  81                         unset($SESSION->user_filtering[$fname][$i]);
  82                     }
  83                     if (empty($SESSION->user_filtering[$fname])) {
  84                         unset($SESSION->user_filtering[$fname]);
  85                     }
  86                 }
  87             }
  88             // clear+reload the form
  89             $_POST = array();
  90             $this->_activeform = new user_active_filter_form($baseurl, array('fields'=>$this->_fields, 'extraparams'=>$extraparams));
  91         }
  92         // now the active filters
  93     }
  94
  95     /**
  96      * Creates known user filter if present
  97      * @param string $fieldname
  98      * @param boolean $advanced
  99      * @return object filter
 100      */
 101     function get_field($fieldname, $advanced) {
 102         global $USER, $CFG, $DB, $SITE;
 103
 104         switch ($fieldname) {
 105             case 'username':    return new user_filter_text('username', get_string('username'), $advanced, 'username');
 106             case 'realname':    return new user_filter_text('realname', get_string('fullnameuser'), $advanced, $DB->sql_fullname());
 107             case 'lastname':    return new user_filter_text('lastname', get_string('lastname'), $advanced, 'lastname');
 108             case 'firstname':    return new user_filter_text('firstname', get_string('firstname'), $advanced, 'firstname');
 109             case 'email':       return new user_filter_text('email', get_string('email'), $advanced, 'email');
 110             case 'city':        return new user_filter_text('city', get_string('city'), $advanced, 'city');
 111             case 'country':     return new user_filter_select('country', get_string('country'), $advanced, 'country', get_string_manager()->get_list_of_countries(), $USER->country);
 112             case 'confirmed':   return new user_filter_yesno('confirmed', get_string('confirmed', 'admin'), $advanced, 'confirmed');
 113             case 'profile':     return new user_filter_profilefield('profile', get_string('profile'), $advanced);
 114             case 'courserole':  return new user_filter_courserole('courserole', get_string('courserole', 'filters'), $advanced);
 115             case 'systemrole':  return new user_filter_globalrole('systemrole', get_string('globalrole', 'role'), $advanced);
 116             case 'firstaccess': return new user_filter_date('firstaccess', get_string('firstaccess', 'filters'), $advanced, 'firstaccess');
 117             case 'lastaccess':  return new user_filter_date('lastaccess', get_string('lastaccess'), $advanced, 'lastaccess');
 118             case 'neveraccessed': return new user_filter_checkbox('neveraccessed', get_string('neveraccessed', 'filters'), $advanced, 'firstaccess', array('lastaccess_sck', 'lastaccess_eck', 'firstaccess_eck', 'firstaccess_sck'));
 119             case 'timemodified': return new user_filter_date('timemodified', get_string('lastmodified'), $advanced, 'timemodified');
 120             case 'nevermodified': return new user_filter_checkbox('nevermodified', get_string('nevermodified', 'filters'), $advanced, array('timemodified', 'timecreated'), array('timemodified_sck', 'timemodified_eck'));
 121             case 'cohort':      return new user_filter_cohort($advanced);
 122             case 'auth':
 123                 $plugins = get_plugin_list('auth');
 124                 $choices = array();
 125                 foreach ($plugins as $auth => $unused) {
 126                     $choices[$auth] = get_string('pluginname', "auth_{$auth}");
 127                 }
 128                 return new user_filter_simpleselect('auth', get_string('authentication'), $advanced, 'auth', $choices);
 129
 130             case 'mnethostid':
 131                 // include all hosts even those deleted or otherwise problematic
 132                 if (!$hosts = $DB->get_records('mnet_host', null, 'id', 'id, wwwroot, name')) {
 133                     $hosts = array();
 134                 }
 135                 $choices = array();
 136                 foreach ($hosts as $host) {
 137                     if ($host->id == $CFG->mnet_localhost_id) {
 138                         $choices[$host->id] =  format_string($SITE->fullname).' ('.get_string('local').')';
 139                     } else if (empty($host->wwwroot)) {
 140                         // All hosts
 141                         continue;
 142                     } else {
 143                         $choices[$host->id] = $host->name.' ('.$host->wwwroot.')';
 144                     }
 145                 }
 146                 if ($usedhosts = $DB->get_fieldset_sql("SELECT DISTINCT mnethostid FROM {user} WHERE deleted=0")) {
 147                     foreach ($usedhosts as $hostid) {
 148                         if (empty($hosts[$hostid])) {
 149                             $choices[$hostid] = 'id: '.$hostid.' ('.get_string('error').')';
 150                         }
 151                     }
 152                 }
 153                 if (count($choices) < 2) {
 154                     return null; // filter not needed
 155                 }
 156                 return new user_filter_simpleselect('mnethostid', get_string('mnetidprovider', 'mnet'), $advanced, 'mnethostid', $choices);
 157
 158             default:            return null;
 159         }
 160     }
 161
 162     /**
 163      * Returns sql where statement based on active user filters
 164      * @param string $extra sql
 165      * @param array named params (recommended prefix ex)
 166      * @return array sql string and $params
 167      */
 168     function get_sql_filter($extra='', array $params=null) {
 169         global $SESSION;
 170
 171         $sqls = array();
 172         if ($extra != '') {
 173             $sqls[] = $extra;
 174         }
 175         $params = (array)$params;
 176
 177         if (!empty($SESSION->user_filtering)) {
 178             foreach ($SESSION->user_filtering as $fname=>$datas) {
 179                 if (!array_key_exists($fname, $this->_fields)) {
 180                     continue; // filter not used
 181                 }
 182                 $field = $this->_fields[$fname];
 183                 foreach($datas as $i=>$data) {
 184                     list($s, $p) = $field->get_sql_filter($data);
 185                     $sqls[] = $s;
 186                     $params = $params + $p;
 187                 }
 188             }
 189         }
 190
 191         if (empty($sqls)) {
 192             return array('', array());
 193         } else {
 194             $sqls = implode(' AND ', $sqls);
 195             return array($sqls, $params);
 196         }
 197     }
 198
 199     /**
 200      * Print the add filter form.
 201      */
 202     function display_add() {
 203         $this->_addform->display();
 204     }
 205
 206     /**
 207      * Print the active filter form.
 208      */
 209     function display_active() {
 210         $this->_activeform->display();
 211     }
 212
 213 }
 214
 215 /**
 216  * The base user filter class. All abstract classes must be implemented.
 217  */
 218 class user_filter_type {
 219     /**
 220      * The name of this filter instance.
 221      */
 222     var $_name;
 223
 224     /**
 225      * The label of this filter instance.
 226      */
 227     var $_label;
 228
 229     /**
 230      * Advanced form element flag
 231      */
 232     var $_advanced;
 233
 234     /**
 235      * Constructor
 236      * @param string $name the name of the filter instance
 237      * @param string $label the label of the filter instance
 238      * @param boolean $advanced advanced form element flag
 239      */
 240     function user_filter_type($name, $label, $advanced) {
 241         $this->_name     = $name;
 242         $this->_label    = $label;
 243         $this->_advanced = $advanced;
 244     }
 245
 246     /**
 247      * Returns the condition to be used with SQL where
 248      * @param array $data filter settings
 249      * @return string the filtering condition or null if the filter is disabled
 250      */
 251     function get_sql_filter($data) {
 252         print_error('mustbeoveride', 'debug', '', 'get_sql_filter');
 253     }
 254
 255     /**
 256      * Retrieves data from the form data
 257      * @param object $formdata data submited with the form
 258      * @return mixed array filter data or false when filter not set
 259      */
 260     function check_data($formdata) {
 261         print_error('mustbeoveride', 'debug', '', 'check_data');
 262     }
 263
 264     /**
 265      * Adds controls specific to this filter in the form.
 266      * @param object $mform a MoodleForm object to setup
 267      */
 268     function setupForm(&$mform) {
 269         print_error('mustbeoveride', 'debug', '', 'setupForm');
 270     }
 271
 272     /**
 273      * Returns a human friendly description of the filter used as label.
 274      * @param array $data filter settings
 275      * @return string active filter label
 276      */
 277     function get_label($data) {
 278         print_error('mustbeoveride', 'debug', '', 'get_label');
 279     }
 280 }