integrated moodleoverflow into the global search

classes/search/moodleoverflowposts.php

@@ -0,0 +1,173 @@
+<?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/>.
+
+/**
+ * Search api for moodleoverflowposts
+ * Copyright 2020 Robin Tschudi
+ */
+
+namespace mod_moodleoverflow\search;
+use core_search\document;
+defined('MOODLE_INTERNAL') || die();
+require_once(dirname(__FILE__) . '/../../locallib.php');
+class moodleoverflowposts extends \core_search\base_mod {
+
+    /**
+     * @var array Internal quick static cache.
+     */
+    protected $postsdata = array();
+    protected $moodleoverflows = array();
+    protected $discussions = array();
+
+    protected static $levels = [CONTEXT_COURSE];
+
+    public function uses_file_indexing() {
+        return false;
+    }
+
+    public function get_document($record, $options = array()) {
+        try {
+            $cm = $this->get_cm('moodleoverflow', $record->moodleoverflowid, $record->course);
+            $context = \context_module::instance($cm->id);
+        } catch (\dml_missing_record_exception $ex) {
+            debugging('Error retrieving ' . $this->areaid . ' ' . $record->id . ' document, not all required data is available: ' .
+                $ex->getMessage(), DEBUG_DEVELOPER);
+            return false;
+        } catch (\dml_exception $ex) {
+            debugging('Error retrieving ' . $this->areaid . ' ' . $record->id . ' document: ' . $ex->getMessage(), DEBUG_DEVELOPER);
+            return false;
+        }
+
+        $doc = \core_search\document_factory::instance($record->id, $this->componentname, $this->areaname);
+
+        $doc->set('title', content_to_text($record->title, true));
+        $doc->set('content', content_to_text($record->message, FORMAT_HTML));
+        $doc->set('contextid', $context->id);
+        $doc->set('type', \core_search\manager::TYPE_TEXT);
+        $doc->set('courseid', $record->course);
+        $doc->set('modified', $record->modified);
+        $doc->set('userid', $record->userid);
+        $doc->set('owneruserid', \core_search\manager::NO_OWNER_ID);
+        $postdata[$record->id[0]] = array('discussionid' => $record->discussion, 'moodleoverflowid' => $record->moodleoverflowid);
+        if (isset($options['lastindexedtime']) && ($options['lastindexedtime'] < $record->created)) {
+            // If the document was created after the last index time, it must be new.
+            $doc->set_is_new(true);
+        }
+
+        return $doc;
+    }
+
+    private function get_discussion_from_id($discussionid) {
+        global $DB;
+        if (isset($this->discussions[$discussionid])) {
+            return $this->discussions[$discussionid];
+        } else {
+            if (!$discussion = $DB->get_record('moodleoverflow_discussions', array('id' => $discussionid))) {
+                return false;
+            }
+            $this->discussions[$discussionid] = $discussion;
+            return $discussion;
+        }
+    }
+
+    private function get_moodleoverflow_from_id($moodleoverflowid) {
+        global $DB;
+        if (isset($this->moodleoverflows[$moodleoverflowid])) {
+            return $this->moodleoverflows[$moodleoverflowid];
+        } else {
+            if (!$moodleoverflow = $DB->get_record('moodleoverflow', array('id' => $moodleoverflowid))) {
+                return false;
+            }
+            $this->moodleoverflows[$moodleoverflowid] = $moodleoverflow;
+            return $moodleoverflow;
+        }
+    }
+
+    public function check_access($id) {
+        try {
+            $post = moodleoverflow_get_post_full($id);
+            if (!$discussion = $this->get_discussion_from_id($post->discussion)) {
+                return \core_search\manager::ACCESS_DELETED;
+            }
+            if (!$moodleoverflow = $this->get_moodleoverflow_from_id($post->moodleoverflow)) {
+                return \core_search\manager::ACCESS_DELETED;
+            }
+            $context = moodleoverflow_get_context($post->moodleoverflow);
+        } catch (\dml_missing_record_exception $ex) {
+            return \core_search\manager::ACCESS_DELETED;
+        } catch (\dml_exception $ex) {
+            return \core_search\manager::ACCESS_DENIED;
+        }
+        if (moodleoverflow_user_can_see_discussion($moodleoverflow, $discussion, $context)) {
+            return \core_search\manager::ACCESS_GRANTED;
+        }
+        return \core_search\manager::ACCESS_DENIED;
+    }
+
+    public function get_discussionid_for_document(document $doc) {
+        global $DB;
+        $postid = $doc->get('itemid');
+        if (isset($this->postsdata[$postid]) && isset($this->postsdata[$postid]['discussionid'])) {
+            return $this->postsdata[$postid]['discussionid'];
+        } else {
+            $discussionid = $DB->get_field('moodleoverflow_posts', 'discussion', array('id' => $postid));
+            if (!isset($this->postsdata[$postid])) {
+                $this->postsdata[$postid] = array();
+            }
+            $this->postsdata[$postid]['discussionid'] = $discussionid;
+            return $discussionid;
+        }
+    }
+
+    public function get_moodleoverflowid_for_document(document $doc) {
+        global $DB;
+        $discussionid = $this->get_discussionid_for_document($doc);
+        $postid = $doc->get('itemid');
+        if (isset($this->postsdata[$postid]) && isset($this->postsdata[$postid]["moodleoverflowid"])) {
+            return $this->postsdata[$postid]["moodleoverflowid"];
+        } else {
+            $moodleoverflowid = $DB->get_field('moodleoverflow_discussions', 'moodleoverflow', array('id' => $discussionid));
+            if (!isset($this->postsdata[$postid])) {
+                $this->postsdata[$postid] = array();
+            }
+            $this->postsdata[$postid]['moodleoverflowid'] = $moodleoverflowid;
+            return $moodleoverflowid;
+        }
+    }
+
+    public function get_doc_url(document $doc) {
+        return new \moodle_url('/mod/moodleoverflow/discussion.php', array('d' => $this->get_discussionid_for_document($doc)),
+            "p" . $doc->get('itemid'));
+    }
+
+    public function get_context_url(document $doc) {
+        return new \moodle_url('/mod/moodleoverflow/view.php', array('m' => $this->get_moodleoverflowid_for_document($doc)));
+    }
+
+    public function get_document_recordset($modifiedfrom = 0, \context $context = null) {
+        global $DB;
+        list($contextjoin, $contextparams) = $this->get_context_restriction_sql($context, 'moodleoverflow', 'discussions');
+        if ($contextjoin === null) {
+            return null;
+        }
+        $sql = "SELECT md.name as title, mp.*, mo.course, mo.id as moodleoverflowid FROM {moodleoverflow_posts} mp
+                                                        JOIN {moodleoverflow_discussions} md ON mp.discussion = md.id
+                                                        JOIN {moodleoverflow} mo ON md.moodleoverflow = mo.id
+                    $contextjoin
+                WHERE mp.modified >= ? ORDER BY mp.modified ASC";
+        return $DB->get_recordset_sql($sql, array_merge($contextparams, [$modifiedfrom]));
+    }
+}

lang/en/moodleoverflow.php

@@ -390,4 +390,7 @@
 $string['updategrades'] = 'Update grades';
 $string['gradesreport'] = 'Grades report';
 $string['gradesupdated'] = 'Grades updated';
-$string['taskupdategrades'] = 'Moodleoverflow maintenance job to update grades';
+$string['taskupdategrades'] = 'Moodleoverflow maintenance job to update grades';
+
+// Search.
+$string['search:moodleoverflowposts'] = 'Moodleoverflow Posts';