TableView.php

<?php

declare(strict_types=1);

namespace DragonCode\Benchmark\View;

use function array_keys;
use function array_map;
use function array_values;
use function implode;
use function max;
use function mb_str_pad;
use function mb_strlen;

class TableView extends View
{
    public function show(array $data): void
    {
        $headers = $this->headers($data);
        $widths  = $this->columnWidths($headers, $data);

        $this->writeHeaderLine($widths);
        $this->writeLine($this->formatRow($headers, $widths));
        $this->writeLine($this->separator($widths));

        foreach ($data as $row) {
            if ($row === [null]) {
                $this->writeLine($this->separator($widths));

                continue;
            }

            $this->writeLine($this->formatRow(array_values($row), $widths));
        }

        $this->writeFooterLine($widths);
    }

    protected function headers(array $data): array
    {
        return array_keys(array_values($data)[0]);
    }

    protected function columnWidths(array $headers, array $data): array
    {
        $widths = array_map(static fn ($header) => mb_strlen((string) $header), $headers);

        foreach ($data as $row) {
            foreach (array_values($row) as $i => $value) {
                $widths[$i] = max($widths[$i], mb_strlen((string) $value));
            }
        }

        return $widths;
    }

    protected function writeHeaderLine(array $widths): void
    {
        $this->writeLine(
            $this->separator($widths, '┌', '┬', '┐')
        );
    }

    protected function writeFooterLine(array $widths): void
    {
        $this->writeLine(
            $this->separator($widths, '└', '┴', '┘')
        );
    }

    protected function separator(array $widths, string $start = '├', string $divider = '┼', string $end = '┤'): string
    {
        $parts = array_map(static fn (int $w) => str_repeat('─', $w + 2), $widths);

        return $start . implode($divider, $parts) . $end;
    }

    protected function formatRow(array $values, array $widths): string
    {
        $cells = [];

        foreach ($values as $i => $value) {
            $cells[] = ' ' . mb_str_pad((string) $value, $widths[$i]) . ' ';
        }

        return '│' . implode('│', $cells) . '│';
    }
}