ContentOwnerSubscriptions.php

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<?php

namespace Elgg\Upgrades;

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

class ContentOwnerSubscriptions extends AsynchronousUpgrade {

    public function getVersion(): int {
        return 2021060401;
    }

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

    public function shouldBeSkipped(): bool {
        $methods = elgg_get_notification_methods();
        if (empty($methods)) {
            return true;
        }
        
        return empty($this->countItems());
    }

    public function countItems(): int {
        return elgg_count_entities($this->getOptions());
    }

    public function run(Result $result, $offset): Result {
        
        /* @var $entities \ElggBatch */
        $entities = elgg_get_entities($this->getOptions([
            'offset' => $offset,
        ]));
        
        $process_entity = function (\ElggEntity $entity) use (&$result) {
            // using setMetadata because we don't want te rely on the magic setters,
            // as they can store data in a different table (eg. widgets, plugins)
            $entity->setMetadata('__content_owner_subscription_upgrade_migrated', time());
            
            $result->addSuccesses();
        };
        
        /* @var $entity \ElggEntity */
        foreach ($entities as $entity) {
            $owner = $entity->getOwnerEntity();
            if (!$owner instanceof \ElggUser) {
                // how did this happen?
                $process_entity($entity);
                continue;
            }
            
            // get user preferences
            $content_preferences = $owner->getNotificationSettings('content_create');
            $enabled_methods = array_keys(array_filter($content_preferences));
            if (empty($enabled_methods)) {
                $process_entity($entity);
                continue;
            }
            
            if ($entity->hasSubscriptions($owner->guid)) {
                // already subscribed
                $process_entity($entity);
                continue;
            }
            
            // add subscption
            $entity->addSubscription($owner->guid, $enabled_methods);
            
            $process_entity($entity);
        }
        
        return $result;
    }
    
    protected function getOptions(array $options = []): array {
        $upgrade = $this->getUpgrade();
        
        $defaults = [
            'created_before' => $upgrade->time_created,
            'limit' => 100,
            'batch' => true,
            'batch_inc_offset' => $this->needsIncrementOffset(),
            'batch_size' => 50,
            'preload_owners' => true,
            'wheres' => [
                function (QueryBuilder $qb, $main_alias) {
                    $owner_guids = $qb->subquery('entities');
                    $owner_guids->select('guid')
                        ->andWhere($qb->compare('type', '=', 'user', ELGG_VALUE_STRING));
                    
                    return $qb->compare("{$main_alias}.owner_guid", 'in', $owner_guids->getSQL());
                },
                function (QueryBuilder $qb, $main_alias) {
                    $metadata = $qb->subquery('metadata', 'md');
                    $metadata->select('md.entity_guid')
                        ->where($qb->compare('md.name', '=', '__content_owner_subscription_upgrade_migrated', ELGG_VALUE_STRING));
                    
                    return $qb->compare("{$main_alias}.guid", 'NOT IN', $metadata->getSQL());
                },
                function (QueryBuilder $qb, $main_alias) {
                    // exclude some subtypes of objects
                    $object = $qb->merge([
                        $qb->compare("{$main_alias}.type", '=', 'object', ELGG_VALUE_STRING),
                        $qb->compare("{$main_alias}.subtype", 'NOT IN', ['widget', 'site_notification', 'messages'], ELGG_VALUE_STRING),
                    ], 'AND');
                    
                    // migrate objects and groups
                    return $qb->merge([
                        $qb->compare("{$main_alias}.type", '=', 'group', ELGG_VALUE_STRING),
                        $object,
                    ], 'OR');
                },
                function (QueryBuilder $qb, $main_alias) {
                    $notification_relationship = $qb->subquery('entity_relationships', 'er');
                    $notification_relationship->select('er.guid_one')
                        ->andWhere($qb->compare('er.guid_two', '=', "{$main_alias}.guid"))
                        ->andWhere($qb->compare('relationship', '=', SubscriptionsService::MUTE_NOTIFICATIONS_RELATIONSHIP, ELGG_VALUE_STRING));
                    
                    return $qb->compare("{$main_alias}.owner_guid", 'NOT IN', $notification_relationship->getSQL());
                },
            ],
        ];
        
        return array_merge($defaults, $options);
    }
}