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✏️ Editing: chapter.php

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

namespace mod_book\search;

defined('MOODLE_INTERNAL') || die();

/**
 * Search area for mod_book chapters.
 *
 * @package    mod_book
 * @copyright  2016 Eric Merrill {@link http://www.merrilldigital.com}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class chapter extends \core_search\base_mod {
    /**
     * @var array Cache of book records.
     */
    protected $bookscache = array();

/**
     * Returns a recordset with all required chapter information.
     *
     * @param int $modifiedfrom
     * @param \context|null $context Optional context to restrict scope of returned results
     * @return moodle_recordset|null Recordset (or null if no results)
     */
    public function get_document_recordset($modifiedfrom = 0, \context $context = null) {
        global $DB;

list ($contextjoin, $contextparams) = $this->get_context_restriction_sql(
                $context, 'book', 'b');
        if ($contextjoin === null) {
            return null;
        }

$sql = "SELECT c.*, b.id AS bookid, b.course AS courseid
                  FROM {book_chapters} c
                  JOIN {book} b ON b.id = c.bookid
          $contextjoin
                 WHERE c.timemodified >= ? ORDER BY c.timemodified ASC";
        return $DB->get_recordset_sql($sql, array_merge($contextparams, [$modifiedfrom]));
    }

/**
     * Returns the document for a particular chapter.
     *
     * @param \stdClass $record A record containing, at least, the indexed document id and a modified timestamp
     * @param array     $options Options for document creation
     * @return \core_search\document
     */
    public function get_document($record, $options = array()) {
        try {
            $cm = $this->get_cm('book', $record->bookid, $record->courseid);
            $context = \context_module::instance($cm->id);
        } catch (\dml_missing_record_exception $ex) {
            // Notify it as we run here as admin, we should see everything.
            debugging('Error retrieving ' . $this->areaid . ' ' . $record->id . ' document, not all required data is available: ' .
                $ex->getMessage(), DEBUG_DEVELOPER);
            return false;
        } catch (\dml_exception $ex) {
            // Notify it as we run here as admin, we should see everything.
            debugging('Error retrieving ' . $this->areaid . ' ' . $record->id . ' document: ' . $ex->getMessage(), DEBUG_DEVELOPER);
            return false;
        }

// Prepare associative array with data from DB.
        $doc = \core_search\document_factory::instance($record->id, $this->componentname, $this->areaname);
        $doc->set('title', content_to_text($record->title, false));
        $doc->set('content', content_to_text($record->content, $record->contentformat));
        $doc->set('contextid', $context->id);
        $doc->set('courseid', $record->courseid);
        $doc->set('owneruserid', \core_search\manager::NO_OWNER_ID);
        $doc->set('modified', $record->timemodified);

// Check if this document should be considered new.
        if (isset($options['lastindexedtime']) && ($options['lastindexedtime'] < $record->timecreated)) {
            // If the document was created after the last index time, it must be new.
            $doc->set_is_new(true);
        }

return $doc;
    }

/**
     * Can the current user see the document.
     *
     * @param int $id The internal search area entity id.
     * @return bool True if the user can see it, false otherwise
     */
    public function check_access($id) {
        global $DB;

try {
            $chapter = $DB->get_record('book_chapters', array('id' => $id), '*', MUST_EXIST);
            if (!isset($this->bookscache[$chapter->bookid])) {
                $this->bookscache[$chapter->bookid] = $DB->get_record('book', array('id' => $chapter->bookid), '*', MUST_EXIST);
            }
            $book = $this->bookscache[$chapter->bookid];
            $cminfo = $this->get_cm('book', $chapter->bookid, $book->course);
        } catch (\dml_missing_record_exception $ex) {
            return \core_search\manager::ACCESS_DELETED;
        } catch (\dml_exception $ex) {
            return \core_search\manager::ACCESS_DENIED;
        }

// Recheck uservisible although it should have already been checked in core_search.
        if ($cminfo->uservisible === false) {
            return \core_search\manager::ACCESS_DENIED;
        }

$context = \context_module::instance($cminfo->id);

if (!has_capability('mod/book:read', $context)) {
            return \core_search\manager::ACCESS_DENIED;
        }

// See if the user can see chapter if it is hidden.
        if ($chapter->hidden && !has_capability('mod/book:viewhiddenchapters', $context)) {
            return \core_search\manager::ACCESS_DENIED;
        }

return \core_search\manager::ACCESS_GRANTED;
    }

/**
     * Returns a url to the chapter.
     *
     * @param \core_search\document $doc
     * @return \moodle_url
     */
    public function get_doc_url(\core_search\document $doc) {
        $contextmodule = \context::instance_by_id($doc->get('contextid'));
        $params = array('id' => $contextmodule->instanceid, 'chapterid' => $doc->get('itemid'));
        return new \moodle_url('/mod/book/view.php', $params);
    }

/**
     * Returns a url to the book.
     *
     * @param \core_search\document $doc
     * @return \moodle_url
     */
    public function get_context_url(\core_search\document $doc) {
        $contextmodule = \context::instance_by_id($doc->get('contextid'));
        return new \moodle_url('/mod/book/view.php', array('id' => $contextmodule->instanceid));
    }

/**
     * Returns true if this area uses file indexing.
     *
     * @return bool
     */
    public function uses_file_indexing() {
        return true;
    }

/**
     * Return the context info required to index files for
     * this search area.
     *
     * @return array
     */
    public function get_search_fileareas() {
        $fileareas = array('chapter'); // Filearea.

return $fileareas;
    }
}

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