--- /dev/null
+<?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/>.
+
+/**
+ * @package block_tags
+ * @copyright 2016 Marina Glancy
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+/**
+ * Specialised restore task for the tags block
+ * (using execute_after_tasks for recoding of tag collection id)
+ *
+ * @package block_tags
+ * @copyright 2016 Marina Glancy
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class restore_tags_block_task extends restore_block_task {
+
+ protected function define_my_settings() {
+ }
+
+ protected function define_my_steps() {
+ }
+
+ public function get_fileareas() {
+ return array(); // No associated fileareas.
+ }
+
+ public function get_configdata_encoded_attributes() {
+ return array(); // No special handling of configdata.
+ }
+
+ /**
+ * This function, executed after all the tasks in the plan
+ * have been executed, will remove tag collection reference in case block was restored into another site.
+ * Also get mapping of contextid.
+ */
+ public function after_restore() {
+ global $DB;
+
+ // Get the blockid.
+ $blockid = $this->get_blockid();
+
+ // Extract block configdata and remove tag collection reference if this is another site. Also map contextid.
+ if ($configdata = $DB->get_field('block_instances', 'configdata', array('id' => $blockid))) {
+ $config = unserialize(base64_decode($configdata));
+ $changed = false;
+ if (!empty($config->tagcoll) && $config->tagcoll > 1 && !$this->is_samesite()) {
+ $config->tagcoll = 0;
+ $changed = true;
+ }
+ if (!empty($config->ctx)) {
+ if ($ctxmap = restore_dbops::get_backup_ids_record($this->get_restoreid(), 'context', $config->ctx)) {
+ $config->ctx = $ctxmap->newitemid;
+ } else {
+ $config->ctx = 0;
+ }
+ $changed = true;
+ }
+ if ($changed) {
+ $configdata = base64_encode(serialize($config));
+ $DB->set_field('block_instances', 'configdata', $configdata, array('id' => $blockid));
+ }
+ }
+ }
+
+ static public function define_decode_contents() {
+ return array();
+ }
+
+ static public function define_decode_rules() {
+ return array();
+ }
+}