index/src/Http/Headers/RangeHeader.php

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2022-09-13 13:13:11 +00:00
<?php
// RangeHeader.php
// Created: 2022-02-14
// Updated: 2022-02-27
namespace Index\Http\Headers;
use stdClass;
use Index\Http\HttpHeader;
class RangeHeader {
private string $unit;
private array $ranges;
public function __construct(string $unit, array $ranges) {
$this->unit = $unit;
$this->ranges = $ranges;
}
public function getUnit(): string {
return $this->unit;
}
public function isBytes(): bool {
return $this->unit === 'bytes';
}
public function getRanges(): array {
return $this->ranges;
}
public static function parse(HttpHeader $header): RangeHeader {
$parts = explode('=', trim($header->getFirstLine()), 2);
$unit = trim($parts[0]);
$ranges = [];
$rawRanges = explode(',', $parts[1] ?? '', 2);
foreach($rawRanges as $raw) {
$raw = explode('-', trim($raw), 2);
$start = trim($raw[0]);
$end = trim($raw[1] ?? '');
$ranges[] = $range = new stdClass;
if($start === '' && is_numeric($end)) {
$range->type = 'suffix-length';
$range->length = intval($end);
} elseif(is_numeric($start) && $end === '') {
$range->type = 'start';
$range->start = intval($start);
} else {
$range->type = 'range';
$range->start = intval($start);
$range->end = intval($end);
}
}
return new RangeHeader($unit, $ranges);
}
}