MDL-50851 block_tags: map context and colleciton in restore

diff --git a/blocks/tags/backup/moodle2/restore_tags_block_task.class.php b/blocks/tags/backup/moodle2/restore_tags_block_task.class.php
new file mode 100644 (file)
index 0000000..11d2087
--- /dev/null
+++ b/blocks/tags/backup/moodle2/restore_tags_block_task.class.php
@@ -0,0 +1,88 @@
+<?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();
+    }
+}