<?php

namespace craft\migrations;

use craft\db\Migration;
use craft\db\Query;
use craft\db\Table;

/**
 * m180518_173000_permissions_to_uid migration.
 */
class m180518_173000_permissions_to_uid extends Migration
{
    /**
     * @inheritdoc
     */
    public function safeUp()
    {
        $permissions = (new Query())
            ->select(['id', 'name'])
            ->from([Table::USERPERMISSIONS])
            ->pairs();

        $userGroupMap = (new Query())
            ->select(['id', 'uid'])
            ->from([Table::USERGROUPS])
            ->pairs();

        $siteMap = (new Query())
            ->select(['id', 'uid'])
            ->from([Table::SITES])
            ->pairs();

        $sectionMap = (new Query())
            ->select(['id', 'uid'])
            ->from([Table::SECTIONS])
            ->pairs();

        $globalSetMap = (new Query())
            ->select(['id', 'uid'])
            ->from([Table::GLOBALSETS])
            ->pairs();

        $categoryGroupMap = (new Query())
            ->select(['id', 'uid'])
            ->from([Table::CATEGORYGROUPS])
            ->pairs();

        $volumeMap = (new Query())
            ->select(['id', 'uid'])
            ->from([Table::VOLUMES])
            ->pairs();

        $relations = [
            'assignusergroup' => $userGroupMap,
            'editsite' => $siteMap,
            'createentries' => $sectionMap,
            'editentries' => $sectionMap,
            'editpeerentrydrafts' => $sectionMap,
            'editpeerentries' => $sectionMap,
            'publishentries' => $sectionMap,
            'publishpeerentrydrafts' => $sectionMap,
            'publishpeerentries' => $sectionMap,
            'deleteentries' => $sectionMap,
            'deletepeerentrydrafts' => $sectionMap,
            'deletepeerentries' => $sectionMap,
            'editglobalset' => $globalSetMap,
            'editcategories' => $categoryGroupMap,
            'viewvolume' => $volumeMap,
            'saveassetinvolume' => $volumeMap,
            'createfoldersinvolume' => $volumeMap,
            'deletefilesandfoldersinvolume' => $volumeMap,
        ];

        foreach ($permissions as $id => $permission) {
            if (
                preg_match('/([\w]+)(:|-)([\d]+)/i', $permission, $matches) &&
                array_key_exists(strtolower($matches[1]), $relations) &&
                !empty($relations[strtolower($matches[1])][$matches[3]])
            ) {
                $permission = $matches[1] . $matches[2] . $relations[strtolower($matches[1])][$matches[3]];
                $this->update(Table::USERPERMISSIONS, ['name' => $permission], ['id' => $id]);
            }
        }
    }

    /**
     * @inheritdoc
     */
    public function safeDown()
    {
        echo "m180518_173000_permissions_to_uid cannot be reverted.\n";

        return false;
    }
}