MigrateACLNotificationPreferences.php

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<?php

namespace Elgg\Upgrades;

use Elgg\Upgrade\AsynchronousUpgrade;
use Elgg\Upgrade\Result;
use Elgg\Database\QueryBuilder;

class MigrateACLNotificationPreferences implements AsynchronousUpgrade {

    public function getVersion(): int {
        return 2021040801;
    }

    public function needsIncrementOffset(): bool {
        return false;
    }

    public function shouldBeSkipped(): bool {
        return empty($this->countItems());
    }

    public function countItems(): int {
        return elgg_get_metadata([
            'type' => 'user',
            'count' => true,
            'wheres' => [
                function(QueryBuilder $qb, $main_alias) {
                    return $qb->compare("{$main_alias}.name", 'like', 'collections_notifications_preferences_%', ELGG_VALUE_STRING);
                },
            ],
        ]);
    }

    public function run(Result $result, $offset): Result {
        $metadata = elgg_get_metadata([
            'type' => 'user',
            'limit' => 50,
            'offset' => $offset,
            'wheres' => [
                function(QueryBuilder $qb, $main_alias) {
                    return $qb->compare("{$main_alias}.name", 'like', 'collections_notifications_preferences_%', ELGG_VALUE_STRING);
                },
            ],
        ]);
        
        $remove_md = function (\ElggMetadata $md) use (&$result) {
            if ($md->delete()) {
                $result->addSuccesses();
            } else {
                $result->addFailures();
            }
        };
        
        /* @var $md \ElggMetadata */
        foreach ($metadata as $md) {
            if ($md->value !== -1) {
                // preference for an access collection which isn't migrated
                $remove_md($md);
                continue;
            }
            
            $method = substr($md->name, strlen('collections_notifications_preferences_'));
            $user = $md->getEntity();
            if ($user instanceof \ElggUser) {
                // only truthy values were saved
                $user->setNotificationSetting($method, true, 'friends');
            }
            
            $remove_md($md);
        }
        
        return $result;
    }
}