componentcreator.php

<?php
 
 
namespace Bitrix\Calendar\ICal\Builder;
 
 
use Bitrix\Calendar\ICal\Basic\Content;
use Bitrix\Calendar\ICal\Basic\PropertyCreator;
 
class ComponentCreator
{
    private $content;
 
    public function __construct(Content $content)
    {
        $this->content = $content;
    }
 
    public function build(): string
    {
        $lines = [];
 
        foreach ($this->buildComponent() as $line) {
            $lines = array_merge($lines, $this->chipLine($line));
        }
 
        return implode("\r\n", $lines)."\r\n";
    }
 
    public function buildComponent(): array
    {
        $lines[] = "BEGIN:{$this->content->getType()}";
 
        $lines = array_merge(
            $lines,
            $this->buildProperties(),
            $this->buildSubComponents()
        );
 
        $lines[] = "END:{$this->content->getType()}";
 
        return $lines;
    }
 
    private function buildProperties(): array
    {
        $lines = [];
 
        foreach ($this->content->getProperties() as $key => $property)
        {
            $builder = new PropertyCreator($property);
 
            $lines = array_merge(
                $lines,
                $builder->build()
            );
        }
 
        return $lines;
    }
 
    private function buildSubComponents(): array
    {
        $lines = [];
 
        foreach ($this->content->getSubComponents() as $component) {
            $builder = new ComponentCreator($component->accessContent());
 
            $lines = array_merge(
                $lines,
                $builder->buildComponent()
            );
        }
 
        return $lines;
    }
 
    private function chipLine(string $line): array
    {
        $chippedLines = [];
 
        while (strlen($line) > 0)
        {
            if (strlen($line) > 75)
            {
                $chippedLines[] = mb_strcut($line, 0, 75, 'utf-8');
                $line = ' '.mb_strcut($line, 75, strlen($line), 'utf-8');
            }
            else
            {
                $chippedLines[] = $line;
 
                break;
            }
        }
 
        return $chippedLines;
    }
}