searchanddisplace-core/app/SearchDisplace/Output/HtmlOutput.php

<?php

namespace App\SearchDisplace\Output;

class HtmlOutput {
    protected $data;
    protected $content;
    protected $indexes = [];
    protected $additions = [];

    public function __construct($data)
    {
        $this->content = $data['content'];
        $this->indexes = $data['indexes'];
    }

    public function getData()
    {
        $html = $this->convertToHTML();

        $indexes = $this->updateIndexes();

        return [
            'content' => $html,
            'indexes' => $indexes
        ];
    }

    protected function convertToHTML()
    {
        $html = '';
        $url = url('/') . '/contracts-images';

        foreach($this->content as $key => $element) {
            $diff = 0;
            if($element->tag !== 'img') {
                $html .= "<$element->tag style=\"$element->style\">$element->content</$element->tag>";
            } else {
                $src = $url . '/' . str_replace(' ', '%20', $element->src);
                $html .= "<img $element->style src=\"$src\" alt=\"$element->details\">";
            }

            if($key !== array_key_last($this->content)) {
                $html .= '<br>';
                $diff = 4;
            }

            if(isset($element->paragraph)) {
                $this->additions[$element->paragraph][] = strlen(utf8_decode($html)) - strlen(utf8_decode($element->content)) - strlen("</$element->tag>") - $diff;
            }
        }

        return $html;
    }

    protected function updateIndexes()
    {
        $indexes = $this->indexes;

        foreach($this->additions as $akey => $addition) {
            foreach($addition as $ckey => $change) {
                $indexes[$akey][$ckey]['start'] += $change;
                $indexes[$akey][$ckey]['end'] += $change;
                $indexes[$akey][$ckey]['original_start'] += $change;
                $indexes[$akey][$ckey]['original_end'] += $change;
            }
        }

        return $indexes;
    }
}