{

use HasFactory;

protected $fillable = [

'user_id',

'viewable_id',

'viewable_type',

];

public function user()

{

return $this->belongsTo(User::class);

}

public static function setViewed($user, $viewable)

{

return self::firstOrCreate([

'user_id' => $user->id,

'viewable_type' => get_class($viewable),

'viewable_id' => $viewable->id,

]);

}

public static function addToResourceCollection(Collection &$collection, User|null $user)

{

if (!$user) {

return $collection;

}

if ($collection->count() === 0) {

return $collection;

}

$class = null;

$firstItem = $collection->first();

if (property_exists($firstItem, 'resource')) {

$firstResource = $firstItem->resource;

if ($firstResource instanceof ProcessRequest) {

$class = ProcessRequest::class;

} elseif ($firstResource instanceof ProcessRequestToken) {

$class = ProcessRequestToken::class;

}

}

if (!$class) {

return $collection;

}

$result = self::where('user_id', $user->id)

->whereIn('viewable_id', $collection->pluck('id'))

->where('viewable_type', $class)

->pluck('created_at', 'viewable_id');

// Use transform instead of map to (maybe) save memory

$collection->transform(function ($item) use ($result) {

$userViewedAt = $result->get($item->id);

$item['user_viewed_at'] = $userViewedAt ? (string) $userViewedAt : null;

return $item;

});

}