MDL-66631 mod_forum: add date filters to export

mod/forum/classes/form/export_form.php

@@ -69,6 +69,12 @@ public function definition() {
         ];
         $mform->addElement('autocomplete', 'discussionids', get_string('discussions', 'mod_forum'), $discussions, $options);
 
+        // Date fields.
+        $mform->addElement('date_time_selector', 'from', get_string('postsfrom', 'mod_forum'),
+                ['optional' => true]);
+        $mform->addElement('date_time_selector', 'to', get_string('poststo', 'mod_forum'),
+                ['optional' => true]);
+
         // Export formats.
         $formats = \core_plugin_manager::instance()->get_plugins_of_type('dataformat');
         $options = [];

mod/forum/classes/local/vaults/post.php

@@ -157,39 +157,70 @@ public function get_from_discussion_ids(
     }
 
     /**
-     * The method returns posts made by the supplied users in the supplied discussions.
+     * The method returns posts based on a set of filters.
      *
      * @param stdClass $user Only used when restricting private replies
-     * @param int[] $discussionids The list of discussion ids to load posts for
-     * @param int[] $userids Only return posts made by these users
+     * @param array $filters Export filters, valid filters are:
+     *
+     * 'discussionids' => array of discussion ids eg [1,2,3]
+     * 'userids' => array of user ids eg [1,2,3]
+     * 'from' => timestamp to filter posts from this date.
+     *  'to' => timestamp to filter posts till this date.
+     *
      * @param bool $canseeprivatereplies Whether this user can see all private replies or not
      * @param string $orderby Order the results
      * @return post_entity[]
      */
-    public function get_from_discussion_ids_and_user_ids(
+    public function get_from_filters(
             stdClass $user,
-            array $discussionids,
-            array $userids,
+            array $filters,
             bool $canseeprivatereplies,
             string $orderby = ''
     ): array {
-        if (empty($discussionids) || empty($userids)) {
+        if (count($filters) == 0) {
             return [];
         }
-
+        $wheresql = [];
+        $params = [];
         $alias = $this->get_table_alias();
 
-        list($indiscussionssql, $indiscussionsparams) = $this->get_db()->get_in_or_equal($discussionids, SQL_PARAMS_NAMED);
-        list($inuserssql, $inusersparams) = $this->get_db()->get_in_or_equal($userids, SQL_PARAMS_NAMED);
+        // Filter by discussion ids.
+        if (!empty($filters['discussionids'])) {
+            list($indiscussionssql, $indiscussionsparams) = $this->get_db()->get_in_or_equal($filters['discussionids'],
+                SQL_PARAMS_NAMED);
+            $wheresql[] = "{$alias}.discussion {$indiscussionssql}";
+            $params += $indiscussionsparams;
+        }
+
+        // Filter by user ids.
+        if (!empty($filters['userids'])) {
+            list($inuserssql, $inusersparams) = $this->get_db()->get_in_or_equal($filters['userids'],
+                SQL_PARAMS_NAMED);
+            $wheresql[] = "{$alias}.userid {$inuserssql}";
+            $params += $inusersparams;
+        }
 
+        // Filter posts by from and to dates.
+        if (isset($filters['from'])) {
+            $wheresql[] = "{$alias}.created >= :from";
+            $params['from'] = $filters['from'];
+        }
+
+        if (isset($filters['to'])) {
+            $wheresql[] = "{$alias}.created < :to";
+            $params['to'] = $filters['to'];
+        }
+
+        // We need to build the WHERE here, because get_private_reply_sql returns the query with the AND clause.
+        $wheresql = implode(' AND ', $wheresql);
+
+        // Build private replies sql.
         [
             'where' => $privatewhere,
             'params' => $privateparams,
         ] = $this->get_private_reply_sql($user, $canseeprivatereplies);
-
-        $wheresql = "{$alias}.discussion {$indiscussionssql}
-                 AND {$alias}.userid {$inuserssql}
-                     {$privatewhere}";
+        $wheresql .= "{$privatewhere}";
+        $params += $privateparams;
 
         if ($orderby) {
             $orderbysql = $alias . '.' . $orderby;
@@ -198,7 +229,7 @@ public function get_from_discussion_ids_and_user_ids(
         }
 
         $sql = $this->generate_get_records_sql($wheresql, $orderbysql);
-        $records = $this->get_db()->get_records_sql($sql, array_merge($indiscussionsparams, $inusersparams, $privateparams));
+        $records = $this->get_db()->get_records_sql($sql, $params);
 
         return $this->transform_db_records_to_entities($records);
     }

mod/forum/export.php

@@ -78,16 +78,19 @@
         }, $discussions);
     }
 
+    $filters = ['discussionids' => $discussionids];
     if ($data->userids) {
-        $posts = $postvault->get_from_discussion_ids_and_user_ids($USER,
-                                                                  $discussionids,
-                                                                  $data->userids,
-                                                                  $capabilitymanager->can_view_any_private_reply($USER));
-    } else {
-        $posts = $postvault->get_from_discussion_ids($USER,
-                                                     $discussionids,
-                                                     $capabilitymanager->can_view_any_private_reply($USER));
+        $filters['userids'] = $data->userids;
+    }
+    if ($data->from) {
+        $filters['from'] = $data->from;
     }
+    if ($data->to) {
+        $filters['to'] = $data->to;
+    }
+
+    // Retrieve posts based on the selected filters.
+    $posts = $postvault->get_from_filters($USER, $filters, $capabilitymanager->can_view_any_private_reply($USER));
 
     $fields = ['id', 'discussion', 'parent', 'userid', 'created', 'modified', 'mailed', 'subject', 'message',
                 'messageformat', 'messagetrust', 'attachment', 'totalscore', 'mailnow', 'deleted', 'privatereplyto'];

mod/forum/lang/en/forum.php

@@ -495,8 +495,10 @@
 $string['postrating2'] = 'Separate and connected';
 $string['postrating3'] = 'Mostly connected knowing';
 $string['posts'] = 'Posts';
+$string['postsfrom'] = 'Posts from';
 $string['postsmadebyuser'] = 'Posts made by {$a}';
 $string['postsmadebyuserincourse'] = 'Posts made by {$a->fullname} in {$a->coursename}';
+$string['poststo'] = 'Posts to';
 $string['posttoforum'] = 'Post to forum';
 $string['postupdated'] = 'Your post was updated';
 $string['potentialsubscribers'] = 'Potential subscribers';