rowassembler.php

См. документацию.

<?php
 
namespace Bitrix\Main\Grid\Row;
 
use Generator;

abstract class RowAssembler
{
    private array $fieldAssemblers;
    private array $visibleColumnIds;

    public function __construct(array $visibleColumnIds)
    {
        $this->visibleColumnIds = $visibleColumnIds;
    }

    abstract protected function prepareFieldAssemblers(): array;

    final protected function getVisibleColumnIds(): array
    {
        return $this->visibleColumnIds;
    }

    private function getAssemblers(): array
    {
        if (!isset($this->fieldAssemblers))
        {
            $this->fieldAssemblers = [];
 
            foreach ($this->prepareFieldAssemblers() as $assembler)
            {
                $this->fieldAssemblers[] = $assembler;
            }
        }
 
        return $this->fieldAssemblers;
    }

    private function getFilteredAssemblers(): Generator
    {
        foreach ($this->getAssemblers() as $fieldAssembler)
        {
            $assemblerColumnsIds = $fieldAssembler->getColumnIds();
            $columnsIds = array_intersect($assemblerColumnsIds, $this->getVisibleColumnIds());
 
            if (!empty($columnsIds))
            {
                if (count($assemblerColumnsIds) !== count($columnsIds))
                {
                    yield $fieldAssembler->clone($columnsIds);
                }
                else
                {
                    yield $fieldAssembler;
                }
            }
        }
    }

    public function prepareRows(array $rowsList): array
    {
        foreach ($this->getFilteredAssemblers() as $fieldAssembler)
        {
            $rowsList = $fieldAssembler->prepareRows($rowsList);
        }
 
        return $rowsList;
    }
}