<?php
namespace Psso;

class Input {
    // input-type constants that map to their HTML equivalents
    /** Plain text. */
    public const string TEXT = 'text';
    /** Hidden/masked text. */
    public const string SECRET = 'password';
    /** Integer. */
    public const string NUMERIC = 'number';

    public protected(set) string $id;
    public protected(set) string $type;
    public protected(set) string $label;
    public protected(set) bool $required;
    public private(set) string $serial;
    
    public function __construct(
        string $id, string $type, string $label, bool $required = true
    ) {
        $this->id = $id;
        $this->type = $type;
        $this->label = $label;
        $this->required = $required;
        $this->serial = base64_encode(random_bytes(9));
    }

    private function getUniqueName(): string {
        return $this->id . '__' . $this->serial;
    }

    public function addAsHtml(\SimpleXMLElement $parent): void {
        $label = $parent->addChild('label', L($this->label));
        $label->addAttribute('for', 'input-' . $this->getUniqueName());
        $input = $parent->addChild('input');
        $input->addAttribute('type', $this->type);
        $input->addAttribute('name', $this->getUniqueName());
        $input->addAttribute('id', 'input-' . $this->getUniqueName());
        if ($this->required) $input->addAttribute('required', '');
    }
}