<?php
// HttpHeaders.php
// Created: 2022-02-08
// Updated: 2022-02-27

namespace Index\Http;

use RuntimeException;

class HttpHeaders {
    private array $headers;

    public function __construct(array $headers) {
        $real = [];

        foreach($headers as $header)
            if($header instanceof HttpHeader)
                $real[strtolower((string)$header->getName())] = $header;

        $this->headers = $real;
    }

    public function hasHeader(string $name): bool {
        return isset($this->headers[strtolower($name)]);
    }

    public function getHeaders(): array {
        return array_values($this->headers);
    }

    public function getHeader(string $name): HttpHeader {
        $name = strtolower($name);
        if(!isset($this->headers[$name]))
            throw new RuntimeException('No header with that name is present.');

        return $this->headers[$name];
    }

    public function getHeaderLine(string $name): string {
        if(!$this->hasHeader($name))
            return '';
        return (string)$this->getHeader($name);
    }

    public function getHeaderLines(string $name): array {
        if(!$this->hasHeader($name))
            return [];
        return $this->getHeader($name)->getLines();
    }

    public function getHeaderFirstLine(string $name): string {
        if(!$this->hasHeader($name))
            return '';
        return $this->getHeader($name)->getFirstLine();
    }
}