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Edit File: MailPoetCssInliner.php

<?php declare(strict_types = 1);

namespace MailPoet\EmailEditor\Integrations\MailPoet;

if (!defined('ABSPATH')) exit;

use Automattic\WooCommerce\EmailEditor\Engine\Renderer\Css_Inliner;
use MailPoetVendor\Pelago\Emogrifier\CssInliner;

class MailPoetCssInliner implements Css_Inliner {
  private CssInliner $inliner;

public function from_html(string $unprocessed_html): self { // phpcs:ignore PSR1.Methods.CamelCapsMethodName.NotCamelCaps -- we need to match the interface
    $that = new self();
    $that->inliner = CssInliner::fromHtml($unprocessed_html);
    /** @phpstan-ignore-next-line return.type - Interface has static in PHP docs but it goes against coding standards in this repo */
    return $that;
  }

public function inline_css(string $css = ''): self {// phpcs:ignore PSR1.Methods.CamelCapsMethodName.NotCamelCaps -- we need to match the interface
    if (!isset($this->inliner)) {
      throw new \LogicException('You must call from_html before calling inline_css');
    }
    $this->inliner->inlineCss($css);
    return $this;
  }

public function render(): string {
    if (!isset($this->inliner)) {
      throw new \LogicException('You must call from_html before calling inline_css');
    }
    return $this->inliner->render();
  }
}

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