generated from Nodarx/template
117 lines
3.1 KiB
PHP
117 lines
3.1 KiB
PHP
<?php
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declare(strict_types=1);
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namespace KTXM\ProviderImap\Client\Protocol\Parser;
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use KTXM\ProviderImap\Client\ImapException;
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use KTXM\ProviderImap\Client\Mailbox;
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/**
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* Decodes an individual LIST response payload into a mailbox.
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*/
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final class ListResponseParser
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{
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public function parse(string $payload): Mailbox
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{
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$payload = trim($payload);
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$offset = 0;
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$attributesToken = $this->readToken($payload, $offset);
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$delimiterToken = $this->readToken($payload, $offset);
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$nameToken = $this->readToken($payload, $offset);
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if ($attributesToken === null || $delimiterToken === null || $nameToken === null) {
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throw new ImapException('Unable to parse LIST response payload: ' . $payload);
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}
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$attributeString = trim($attributesToken, '() ');
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$attributes = $attributeString === '' || strtoupper($attributeString) === 'NIL'
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? []
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: array_map('strtoupper', preg_split('/\s+/', $attributeString) ?: []);
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$delimiter = $this->decodeAtom($delimiterToken);
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$name = $this->decodeMailboxName($nameToken);
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return new Mailbox($name, $delimiter, $attributes);
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}
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private function readToken(string $payload, int &$offset): ?string
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{
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$length = strlen($payload);
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while ($offset < $length && ctype_space($payload[$offset])) {
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$offset++;
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}
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if ($offset >= $length) {
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return null;
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}
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if ($payload[$offset] === '(') {
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$end = strpos($payload, ')', $offset);
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if ($end === false) {
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throw new ImapException('Unterminated LIST attribute block: ' . $payload);
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}
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$token = substr($payload, $offset, $end - $offset + 1);
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$offset = $end + 1;
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return $token;
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}
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if ($payload[$offset] === '"') {
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$start = $offset;
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$offset++;
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while ($offset < $length) {
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if ($payload[$offset] === '\\') {
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$offset += 2;
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continue;
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}
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if ($payload[$offset] === '"') {
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$offset++;
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return substr($payload, $start, $offset - $start);
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}
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$offset++;
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}
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throw new ImapException('Unterminated quoted LIST token: ' . $payload);
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}
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$start = $offset;
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while ($offset < $length && !ctype_space($payload[$offset])) {
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$offset++;
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}
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return substr($payload, $start, $offset - $start);
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}
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private function decodeAtom(string $value): ?string
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{
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$value = trim($value);
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if (strtoupper($value) === 'NIL') {
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return null;
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}
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if (str_starts_with($value, '"') && str_ends_with($value, '"')) {
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return stripcslashes(substr($value, 1, -1));
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}
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return $value;
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}
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private function decodeMailboxName(string $value): string
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{
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$name = $this->decodeAtom($value);
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// LIST may advertise the root mailbox as an empty quoted string.
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return $name ?? '';
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}
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}
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