<?php

namespace App\Ingest;

class MDConvertor
{
    protected $content;

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

    public function execute()
    {
        return $this->handleParagraphs($this->content);
    }

    protected function handleParagraphs(array $paragraphs, $depth = 1)
    {
        $content = '';

        foreach ($paragraphs as $paragraph) {
            $content = $content .
                str_repeat('#', $depth) .
                ' ' .
                (isset($paragraph['numbering']) ? $paragraph['numbering'] : '') .
                ' ' .
                $this->parseContent($paragraph['content']) .
                "\n";

            if (
                array_key_exists('children', $paragraph) &&
                $paragraph['children'] &&
                is_array($paragraph['children'])
            ) {
                $childrenContent = $this->handleParagraphs($paragraph['children'], $depth + 1);

                $content = $content . $childrenContent;
            }
        }

        return $content;
    }

    protected function parseContent($content)
    {
        $content = preg_replace("/\xE2\x80\x8B/", "", $content);
        $content = preg_replace("/[\x{200B}-\x{200D}\x{FEFF}]/u", "", $content);

        return utf8_decode($content);
    }
}