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241 lines
8.5 KiB
241 lines
8.5 KiB
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Search area base class for activities.
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*
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* @package core_search
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* @copyright 2016 Dan Poltawski
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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namespace core_search;
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defined('MOODLE_INTERNAL') || die();
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/**
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* Base implementation for activity modules.
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*
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* @package core_search
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* @copyright 2016 Dan Poltawski
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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abstract class base_activity extends base_mod {
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/**
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* @var string The time modified field name.
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*
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* Activities not using timemodified as field name
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* can overwrite this constant.
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*/
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const MODIFIED_FIELD_NAME = 'timemodified';
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/**
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* Activities with a time created field can overwrite this constant.
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*/
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const CREATED_FIELD_NAME = '';
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/**
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* The context levels the search area is working on.
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* @var array
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*/
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protected static $levels = [CONTEXT_MODULE];
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/**
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* Returns recordset containing all activities within the given context.
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*
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* @param \context|null $context Context
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* @param int $modifiedfrom Return only records modified after this date
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* @return \moodle_recordset|null Recordset, or null if no possible activities in given context
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*/
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public function get_document_recordset($modifiedfrom = 0, \context $context = null) {
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global $DB;
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list ($contextjoin, $contextparams) = $this->get_context_restriction_sql(
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$context, $this->get_module_name(), 'modtable');
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if ($contextjoin === null) {
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return null;
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}
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return $DB->get_recordset_sql('SELECT modtable.* FROM {' . $this->get_module_name() .
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'} modtable ' . $contextjoin . ' WHERE modtable.' . static::MODIFIED_FIELD_NAME .
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' >= ? ORDER BY modtable.' . static::MODIFIED_FIELD_NAME . ' ASC',
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array_merge($contextparams, [$modifiedfrom]));
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}
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/**
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* Returns the document associated with this activity.
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*
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* This default implementation for activities sets the activity name to title and the activity intro to
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* content. Any activity can overwrite this function if it is interested in setting other fields than the
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* default ones, or to fill description optional fields with extra stuff.
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*
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* @param stdClass $record
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* @param array $options
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* @return \core_search\document
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*/
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public function get_document($record, $options = array()) {
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try {
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$cm = $this->get_cm($this->get_module_name(), $record->id, $record->course);
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$context = \context_module::instance($cm->id);
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} catch (\dml_missing_record_exception $ex) {
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// Notify it as we run here as admin, we should see everything.
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debugging('Error retrieving ' . $this->areaid . ' ' . $record->id . ' document, not all required data is available: ' .
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$ex->getMessage(), DEBUG_DEVELOPER);
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return false;
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} catch (\dml_exception $ex) {
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// Notify it as we run here as admin, we should see everything.
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debugging('Error retrieving ' . $this->areaid . ' ' . $record->id . ' document: ' . $ex->getMessage(), DEBUG_DEVELOPER);
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return false;
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}
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// Prepare associative array with data from DB.
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$doc = \core_search\document_factory::instance($record->id, $this->componentname, $this->areaname);
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$doc->set('title', content_to_text($record->name, false));
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$doc->set('content', content_to_text($record->intro, $record->introformat));
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$doc->set('contextid', $context->id);
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$doc->set('courseid', $record->course);
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$doc->set('owneruserid', \core_search\manager::NO_OWNER_ID);
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$doc->set('modified', $record->{static::MODIFIED_FIELD_NAME});
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// Check if this document should be considered new.
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if (isset($options['lastindexedtime'])) {
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$createdfield = static::CREATED_FIELD_NAME;
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if (!empty($createdfield) && ($options['lastindexedtime'] < $record->{$createdfield})) {
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// If the document was created after the last index time, it must be new.
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$doc->set_is_new(true);
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}
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}
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return $doc;
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}
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/**
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* Whether the user can access the document or not.
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*
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* @throws \dml_missing_record_exception
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* @throws \dml_exception
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* @param int $id The activity instance id.
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* @return bool
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*/
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public function check_access($id) {
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global $DB;
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try {
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$activity = $this->get_activity($id);
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$cminfo = $this->get_cm($this->get_module_name(), $activity->id, $activity->course);
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$cminfo->get_course_module_record();
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} catch (\dml_missing_record_exception $ex) {
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return \core_search\manager::ACCESS_DELETED;
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} catch (\dml_exception $ex) {
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return \core_search\manager::ACCESS_DENIED;
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}
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// Recheck uservisible although it should have already been checked in core_search.
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if ($cminfo->uservisible === false) {
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return \core_search\manager::ACCESS_DENIED;
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}
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return \core_search\manager::ACCESS_GRANTED;
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}
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/**
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* Link to the module instance.
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*
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* @param \core_search\document $doc
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* @return \moodle_url
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*/
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public function get_doc_url(\core_search\document $doc) {
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return $this->get_context_url($doc);
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}
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/**
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* Link to the module instance.
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*
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* @param \core_search\document $doc
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* @return \moodle_url
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*/
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public function get_context_url(\core_search\document $doc) {
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$cminfo = $this->get_cm($this->get_module_name(), strval($doc->get('itemid')), $doc->get('courseid'));
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return new \moodle_url('/mod/' . $this->get_module_name() . '/view.php', array('id' => $cminfo->id));
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}
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/**
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* Returns an activity instance. Internally uses the class component to know which activity module should be retrieved.
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*
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* @param int $instanceid
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* @return stdClass
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*/
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protected function get_activity($instanceid) {
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global $DB;
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if (empty($this->activitiesdata[$this->get_module_name()][$instanceid])) {
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$this->activitiesdata[$this->get_module_name()][$instanceid] = $DB->get_record($this->get_module_name(),
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array('id' => $instanceid), '*', MUST_EXIST);
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}
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return $this->activitiesdata[$this->get_module_name()][$instanceid];
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}
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/**
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* Return the context info required to index files for
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* this search area.
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*
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* Should be onerridden by each search area.
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*
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* @return array
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*/
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public function get_search_fileareas() {
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$fileareas = array(
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'intro' // Fileareas.
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);
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return $fileareas;
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}
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/**
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* Files related to the current document are attached,
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* to the document object ready for indexing by
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* Global Search.
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*
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* The default implementation retrieves all files for
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* the file areas returned by get_search_fileareas().
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* If you need to filter files to specific items per
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* file area, you will need to override this method
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* and explicitly provide the items.
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*
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* @param document $document The current document
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* @return void
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*/
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public function attach_files($document) {
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$fileareas = $this->get_search_fileareas();
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if (!empty($fileareas)) {
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$cm = $this->get_cm($this->get_module_name(), $document->get('itemid'), $document->get('courseid'));
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$context = \context_module::instance($cm->id);
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$contextid = $context->id;
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$fs = get_file_storage();
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$files = $fs->get_area_files($contextid, $this->get_component_name(), $fileareas, false, '', false);
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foreach ($files as $file) {
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$document->add_stored_file($file);
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}
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}
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return;
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}
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}
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