[Summary view]

Differences Between: [Versions 401 and 402] [Versions 401 and 403]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Search area for Moodle courses.
  19   *
  20   * @package    core_course
  21   * @copyright  2016 Skylar Kelty <S.Kelty@kent.ac.uk>
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  namespace core_course\search;
  25  
  26  defined('MOODLE_INTERNAL') || die();
  27  
  28  /**
  29   * Search area for Moodle courses.
  30   *
  31   * @package    core_course
  32   * @copyright  2016 Skylar Kelty <S.Kelty@kent.ac.uk>
  33   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  34   */
  35  class course extends \core_search\base {
  36  
  37      /**
  38       * The context levels the search implementation is working on.
  39       *
  40       * @var array
  41       */
  42      protected static $levels = [CONTEXT_COURSE];
  43  
  44      /**
  45       * Returns recordset containing required data for indexing courses.
  46       *
  47       * @param int $modifiedfrom timestamp
  48       * @param \context|null $context Restriction context
  49       * @return \moodle_recordset|null Recordset or null if no change possible
  50       */
  51      public function get_document_recordset($modifiedfrom = 0, \context $context = null) {
  52          global $DB;
  53  
  54          list ($contextjoin, $contextparams) = $this->get_course_level_context_restriction_sql(
  55                  $context, 'c');
  56          if ($contextjoin === null) {
  57              return null;
  58          }
  59  
  60          return $DB->get_recordset_sql("
  61                  SELECT c.*
  62                    FROM {course} c
  63            $contextjoin
  64                   WHERE c.timemodified >= ?
  65                ORDER BY c.timemodified ASC", array_merge($contextparams, [$modifiedfrom]));
  66      }
  67  
  68      /**
  69       * Returns the document associated with this course.
  70       *
  71       * @param stdClass $record
  72       * @param array    $options
  73       * @return \core_search\document
  74       */
  75      public function get_document($record, $options = array()) {
  76          try {
  77              $context = \context_course::instance($record->id);
  78          } catch (\moodle_exception $ex) {
  79              // Notify it as we run here as admin, we should see everything.
  80              debugging('Error retrieving ' . $this->areaid . ' ' . $record->id . ' document, not all required data is available: ' .
  81                  $ex->getMessage(), DEBUG_DEVELOPER);
  82              return false;
  83          }
  84          // Prepare associative array with data from DB.
  85          $doc = \core_search\document_factory::instance($record->id, $this->componentname, $this->areaname);
  86          $doc->set('title', content_to_text($record->fullname, false));
  87          $doc->set('content', content_to_text($record->summary, $record->summaryformat));
  88          $doc->set('contextid', $context->id);
  89          $doc->set('courseid', $record->id);
  90          $doc->set('owneruserid', \core_search\manager::NO_OWNER_ID);
  91          $doc->set('modified', $record->timemodified);
  92          $doc->set('description1', $record->shortname);
  93  
  94          // Check if this document should be considered new.
  95          if (isset($options['lastindexedtime']) && $options['lastindexedtime'] < $record->timecreated) {
  96              // If the document was created after the last index time, it must be new.
  97              $doc->set_is_new(true);
  98          }
  99  
 100          return $doc;
 101      }
 102  
 103      /**
 104       * Whether the user can access the document or not.
 105       *
 106       * @param int $id The course instance id.
 107       * @return int
 108       */
 109      public function check_access($id) {
 110          global $DB;
 111          $course = $DB->get_record('course', array('id' => $id));
 112          if (!$course) {
 113              return \core_search\manager::ACCESS_DELETED;
 114          }
 115  
 116          if (\core_course_category::can_view_course_info($course)) {
 117              return \core_search\manager::ACCESS_GRANTED;
 118          }
 119  
 120          return \core_search\manager::ACCESS_DENIED;
 121      }
 122  
 123      /**
 124       * Link to the course.
 125       *
 126       * @param \core_search\document $doc
 127       * @return \moodle_url
 128       */
 129      public function get_doc_url(\core_search\document $doc) {
 130          return $this->get_context_url($doc);
 131      }
 132  
 133      /**
 134       * Link to the course.
 135       *
 136       * @param \core_search\document $doc
 137       * @return \moodle_url
 138       */
 139      public function get_context_url(\core_search\document $doc) {
 140          return new \moodle_url('/course/view.php', array('id' => $doc->get('courseid')));
 141      }
 142  
 143      /**
 144       * Returns true if this area uses file indexing.
 145       *
 146       * @return bool
 147       */
 148      public function uses_file_indexing() {
 149          return true;
 150      }
 151  
 152      /**
 153       * Return the context info required to index files for
 154       * this search area.
 155       *
 156       * Should be overridden by each search area.
 157       *
 158       * @return array
 159       */
 160      public function get_search_fileareas() {
 161          $fileareas = array(
 162                  'overviewfiles',
 163                  'summary'// Fileareas.
 164          );
 165  
 166          return $fileareas;
 167      }
 168  
 169      /**
 170       * Returns the moodle component name.
 171       *
 172       * It might be the plugin name (whole frankenstyle name) or the core subsystem name.
 173       *
 174       * @return string
 175       */
 176      public function get_component_name() {
 177          return 'course';
 178      }
 179  
 180      /**
 181       * Returns an icon instance for the document.
 182       *
 183       * @param \core_search\document $doc
 184       * @return \core_search\document_icon
 185       */
 186      public function get_doc_icon(\core_search\document $doc) : \core_search\document_icon {
 187          return new \core_search\document_icon('i/course');
 188      }
 189  
 190      /**
 191       * Returns a list of category names associated with the area.
 192       *
 193       * @return array
 194       */
 195      public function get_category_names() {
 196          return [\core_search\manager::SEARCH_AREA_CATEGORY_COURSES];
 197      }
 198  }