C:/xampp/htdocs/moodle/backup/moodle2/restore_plugin.class.php

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<?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/>.

abstract class restore_plugin {

    protected $plugintype;
    protected $pluginname;
    protected $connectionpoint;
    protected $step;
    protected $task;

    public function __construct($plugintype, $pluginname, $step) {
        $this->plugintype = $plugintype;
        $this->pluginname = $pluginname;
        $this->step          = $step;
        $this->task          = $step->get_task();
        $this->connectionpoint = '';
    }

    public function define_plugin_structure($connectionpoint) {
        if (!$connectionpoint instanceof restore_path_element) {
            throw new restore_step_exception('restore_path_element_required', $connectionpoint);
        }

        $paths = array();
        $this->connectionpoint = $connectionpoint;
        $methodname = 'define_' . basename($this->connectionpoint->get_path()) . '_plugin_structure';

        if (method_exists($this, $methodname)) {
            if ($bluginpaths = $this->$methodname()) {
                foreach ($bluginpaths as $path) {
                    $path->set_processing_object($this);
                    $paths[] = $path;
                }
            }
        }
        return $paths;
    }

    public function launch_after_execute_methods() {
        // Check if the after_execute method exists and launch it
        $afterexecute = 'after_execute_' . basename($this->connectionpoint->get_path());
        if (method_exists($this, $afterexecute)) {
            $this->$afterexecute();
        }
    }

    public function launch_after_restore_methods() {
        // Check if the after_restore method exists and launch it
        $afterrestore = 'after_restore_' . basename($this->connectionpoint->get_path());
        if (method_exists($this, $afterrestore)) {
            $this->$afterrestore();
        }
    }

    static public function get_restore_decode_contents($plugintype) {
        $decodecontents = array();
        // Check the requested plugintype is a valid one
        if (!array_key_exists($plugintype, get_plugin_types($plugintype))) {
             throw new backup_step_exception('incorrect_plugin_type', $plugintype);
        }
        // Check the base plugin class exists
        $classname = 'restore_' . $plugintype . '_plugin';
        if (!class_exists($classname)) {
             throw new backup_step_exception('plugin_class_not_found', $classname);
        }
        // First, call to the define_plugin_decode_contents in the base plugin class
        // (must exist by design in all the plugin base classes)
        if (method_exists($classname, 'define_plugin_decode_contents')) {
            $decodecontents = array_merge($decodecontents, call_user_func(array($classname, 'define_plugin_decode_contents')));
        }
        // Now, iterate over all the possible plugins available
        // (only the needed ones have been loaded, so they will
        // be the ones being asked here). Fetch their restore contents
        // by calling (if exists) to their define_decode_contents() method
        $plugins = get_plugin_list($plugintype);
        foreach ($plugins as $plugin => $plugindir) {
            $classname = 'restore_' . $plugintype . '_' . $plugin . '_plugin';
            if (class_exists($classname)) {
                if (method_exists($classname, 'define_decode_contents')) {
                    $decodecontents = array_merge($decodecontents, call_user_func(array($classname, 'define_decode_contents')));
                }
            }
        }
        return $decodecontents;
    }

    static public function define_plugin_decode_contents() {
        throw new coding_exception('define_plugin_decode_contents() method needs to be overridden in each subclass of restore_plugin');
    }

// Protected API starts here

// restore_step/structure_step/task wrappers

    protected function get_restoreid() {
        if (is_null($this->task)) {
            throw new restore_step_exception('not_specified_restore_task');
        }
        return $this->task->get_restoreid();
    }

    protected function set_mapping($itemname, $oldid, $newid, $restorefiles = false, $filesctxid = null, $parentid = null) {
        $this->step->set_mapping($itemname, $oldid, $newid, $restorefiles, $filesctxid, $parentid);
    }

    protected function get_old_parentid($itemname) {
        return $this->step->get_old_parentid($itemname);
    }

    protected function get_new_parentid($itemname) {
        return $this->step->get_new_parentid($itemname);
    }

    protected function get_mappingid($itemname, $oldid, $ifnotfound = false) {
        return $this->step->get_mappingid($itemname, $oldid, $ifnotfound);
    }

    protected function get_mapping($itemname, $oldid) {
        return $this->step->get_mapping($itemname, $oldid);
    }

    protected function add_related_files($component, $filearea, $mappingitemname, $filesctxid = null, $olditemid = null) {
        $this->step->add_related_files($component, $filearea, $mappingitemname, $filesctxid, $olditemid);
    }

    protected function apply_date_offset($value) {
        return $this->step->apply_date_offset($value);
    }

    protected function get_setting_value($name) {
        if (is_null($this->task)) {
            throw new restore_step_exception('not_specified_restore_task');
        }
        return $this->task->get_setting_value($name);
    }

// end of restore_step/structure_step/task wrappers

    protected function get_namefor($name = '') {
        $name = $name !== '' ? '_' . $name : '';
        return $this->plugintype . '_' . $this->pluginname . $name;
    }

    protected function get_pathfor($path = '') {
        $path = trim($path, '/') !== '' ? '/' . trim($path, '/') : '';
        return $this->connectionpoint->get_path() . '/' .
               'plugin_' . $this->plugintype . '_' .
               $this->pluginname . '_' . basename($this->connectionpoint->get_path()) . $path;
    }
}