NotificationsPrefix.php

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<?php

namespace Elgg\Upgrades;

use Elgg\Database\Delete;
use Elgg\Database\QueryBuilder;
use Elgg\Database\Select;
use Elgg\Database\Update;
use Elgg\Notifications\SubscriptionsService;
use Elgg\Upgrade\AsynchronousUpgrade;
use Elgg\Upgrade\Result;

class NotificationsPrefix implements AsynchronousUpgrade {

    public function getVersion(): int {
        return 2021022401;
    }
    
    public function needsIncrementOffset(): bool {
        return false;
    }
    
    public function shouldBeSkipped(): bool {
        $methods = _elgg_services()->notifications->getMethods();
        
        return empty($methods) || empty($this->countItems());
    }
    
    public function countItems(): int {
        return elgg_count_entities($this->getEntityGUIDOptions());
    }
    
    public function run(Result $result, $offset): Result {
        $relationship_prefix = SubscriptionsService::RELATIONSHIP_PREFIX;
        $methods = _elgg_services()->notifications->getMethods();
        
        $guids = elgg_get_entities($this->getEntityGUIDOptions([
            'offset' => $offset,
        ]));
        
        foreach ($methods as $method) {
            $select = Select::fromTable('entity_relationships', 'r1');
            
            // exclude already migrated relationships
            $exists = $select->subquery('entity_relationships', 'r2');
            $exists->select('1')
                ->where($select->compare('r1.guid_one', '=', 'r2.guid_one'))
                ->andWhere($select->compare('r1.guid_two', '=', 'r2.guid_two'))
                ->andWhere($select->compare('r2.relationship', '=', "{$relationship_prefix}:{$method}", ELGG_VALUE_STRING));
            
            // get old relationships
            $select->select('id')
                ->where($select->compare('r1.relationship', '=', "{$relationship_prefix}{$method}", ELGG_VALUE_STRING))
                ->andWhere($select->compare('r1.guid_one', 'in', $guids, ELGG_VALUE_GUID))
                ->andWhere($select->compare(null, 'not exists', $exists->getSQL()));
            
            $ids = _elgg_services()->db->getData($select, function($row) {
                return (int) $row->id;
            });
            if (!empty($ids)) {
                // update old relationships to new relationship
                $update = Update::table('entity_relationships');
                $update->set('relationship', $update->param("{$relationship_prefix}:{$method}", ELGG_VALUE_STRING))
                    ->where($update->compare('relationship', '=', "{$relationship_prefix}{$method}", ELGG_VALUE_STRING))
                    ->andWhere($update->compare('id', 'in', $ids, ELGG_VALUE_ID));
                
                _elgg_services()->db->updateData($update);
            }
            
            // delete old relationships that couldn't be migrated because of key constraints
            $delete = Delete::fromTable('entity_relationships');
            $delete->where($delete->compare('guid_one', 'in', $guids, ELGG_VALUE_GUID))
                ->andWhere($delete->compare('relationship', '=', "{$relationship_prefix}{$method}", ELGG_VALUE_STRING));
            
            _elgg_services()->db->deleteData($delete);
        }
        
        $result->addSuccesses(count($guids));
        
        return $result;
    }
    
    protected function getEntityGUIDOptions(array $options = []): array {
        $methods = _elgg_services()->notifications->getMethods();
        
        $defaults = [
            'limit' => 100,
            'callback' => function($row) {
                return (int) $row->guid;
            },
            'wheres' => [
                function(QueryBuilder $qb, $main_alias) use ($methods) {
                    $rel = $qb->joinRelationshipTable($main_alias, 'guid', null, true);
                    
                    $old_relationships = [];
                    foreach ($methods as $method) {
                        $old_relationships[] = SubscriptionsService::RELATIONSHIP_PREFIX . $method;
                    }
                    
                    return $qb->compare("{$rel}.relationship", 'in', $old_relationships, ELGG_VALUE_STRING);
                },
            ],
        ];
        
        return array_merge($defaults, $options);
    }
}