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Mini Shell
<?php
namespace Egulias\EmailValidator\Parser;
use Doctrine\Common\Lexer\Token;
use Egulias\EmailValidator\EmailLexer;
use Egulias\EmailValidator\Warning\TLD;
use Egulias\EmailValidator\Result\Result;
use Egulias\EmailValidator\Result\ValidEmail;
use Egulias\EmailValidator\Result\InvalidEmail;
use Egulias\EmailValidator\Result\Reason\DotAtEnd;
use Egulias\EmailValidator\Result\Reason\DotAtStart;
use Egulias\EmailValidator\Warning\DeprecatedComment;
use Egulias\EmailValidator\Result\Reason\CRLFAtTheEnd;
use Egulias\EmailValidator\Result\Reason\LabelTooLong;
use Egulias\EmailValidator\Result\Reason\NoDomainPart;
use Egulias\EmailValidator\Result\Reason\ConsecutiveAt;
use Egulias\EmailValidator\Result\Reason\DomainTooLong;
use Egulias\EmailValidator\Result\Reason\CharNotAllowed;
use Egulias\EmailValidator\Result\Reason\DomainHyphened;
use Egulias\EmailValidator\Result\Reason\ExpectingATEXT;
use Egulias\EmailValidator\Parser\CommentStrategy\DomainComment;
use Egulias\EmailValidator\Result\Reason\ExpectingDomainLiteralClose;
use Egulias\EmailValidator\Parser\DomainLiteral as DomainLiteralParser;
class DomainPart extends PartParser
{
public const DOMAIN_MAX_LENGTH = 253;
public const LABEL_MAX_LENGTH = 63;
/**
* @var string
*/
protected $domainPart = '';
/**
* @var string
*/
protected $label = '';
public function parse() : Result
{
$this->lexer->clearRecorded();
$this->lexer->startRecording();
$this->lexer->moveNext();
$domainChecks = $this->performDomainStartChecks();
if ($domainChecks->isInvalid()) {
return $domainChecks;
}
if ($this->lexer->token['type'] === EmailLexer::S_AT) {
return new InvalidEmail(new ConsecutiveAt(), $this->lexer->token['value']);
}
$result = $this->doParseDomainPart();
if ($result->isInvalid()) {
return $result;
}
$end = $this->checkEndOfDomain();
if ($end->isInvalid()) {
return $end;
}
$this->lexer->stopRecording();
$this->domainPart = $this->lexer->getAccumulatedValues();
$length = strlen($this->domainPart);
if ($length > self::DOMAIN_MAX_LENGTH) {
return new InvalidEmail(new DomainTooLong(), $this->lexer->token['value']);
}
return new ValidEmail();
}
private function checkEndOfDomain() : Result
{
$prev = $this->lexer->getPrevious();
if ($prev['type'] === EmailLexer::S_DOT) {
return new InvalidEmail(new DotAtEnd(), $this->lexer->token['value']);
}
if ($prev['type'] === EmailLexer::S_HYPHEN) {
return new InvalidEmail(new DomainHyphened('Hypen found at the end of the domain'), $prev['value']);
}
if ($this->lexer->token['type'] === EmailLexer::S_SP) {
return new InvalidEmail(new CRLFAtTheEnd(), $prev['value']);
}
return new ValidEmail();
}
private function performDomainStartChecks() : Result
{
$invalidTokens = $this->checkInvalidTokensAfterAT();
if ($invalidTokens->isInvalid()) {
return $invalidTokens;
}
$missingDomain = $this->checkEmptyDomain();
if ($missingDomain->isInvalid()) {
return $missingDomain;
}
if ($this->lexer->token['type'] === EmailLexer::S_OPENPARENTHESIS) {
$this->warnings[DeprecatedComment::CODE] = new DeprecatedComment();
}
return new ValidEmail();
}
private function checkEmptyDomain() : Result
{
$thereIsNoDomain = $this->lexer->token['type'] === EmailLexer::S_EMPTY ||
($this->lexer->token['type'] === EmailLexer::S_SP &&
!$this->lexer->isNextToken(EmailLexer::GENERIC));
if ($thereIsNoDomain) {
return new InvalidEmail(new NoDomainPart(), $this->lexer->token['value']);
}
return new ValidEmail();
}
private function checkInvalidTokensAfterAT() : Result
{
if ($this->lexer->token['type'] === EmailLexer::S_DOT) {
return new InvalidEmail(new DotAtStart(), $this->lexer->token['value']);
}
if ($this->lexer->token['type'] === EmailLexer::S_HYPHEN) {
return new InvalidEmail(new DomainHyphened('After AT'), $this->lexer->token['value']);
}
return new ValidEmail();
}
protected function parseComments(): Result
{
$commentParser = new Comment($this->lexer, new DomainComment());
$result = $commentParser->parse();
$this->warnings = array_merge($this->warnings, $commentParser->getWarnings());
return $result;
}
protected function doParseDomainPart() : Result
{
$tldMissing = true;
$hasComments = false;
$domain = '';
do {
$prev = $this->lexer->getPrevious();
$notAllowedChars = $this->checkNotAllowedChars($this->lexer->token);
if ($notAllowedChars->isInvalid()) {
return $notAllowedChars;
}
if ($this->lexer->token['type'] === EmailLexer::S_OPENPARENTHESIS ||
$this->lexer->token['type'] === EmailLexer::S_CLOSEPARENTHESIS ) {
$hasComments = true;
$commentsResult = $this->parseComments();
//Invalid comment parsing
if($commentsResult->isInvalid()) {
return $commentsResult;
}
}
$dotsResult = $this->checkConsecutiveDots();
if ($dotsResult->isInvalid()) {
return $dotsResult;
}
if ($this->lexer->token['type'] === EmailLexer::S_OPENBRACKET) {
$literalResult = $this->parseDomainLiteral();
$this->addTLDWarnings($tldMissing);
return $literalResult;
}
$labelCheck = $this->checkLabelLength();
if ($labelCheck->isInvalid()) {
return $labelCheck;
}
$FwsResult = $this->parseFWS();
if($FwsResult->isInvalid()) {
return $FwsResult;
}
$domain .= $this->lexer->token['value'];
if ($this->lexer->token['type'] === EmailLexer::S_DOT && $this->lexer->isNextToken(EmailLexer::GENERIC)) {
$tldMissing = false;
}
$exceptionsResult = $this->checkDomainPartExceptions($prev, $hasComments);
if ($exceptionsResult->isInvalid()) {
return $exceptionsResult;
}
$this->lexer->moveNext();
} while (null !== $this->lexer->token['type']);
$labelCheck = $this->checkLabelLength(true);
if ($labelCheck->isInvalid()) {
return $labelCheck;
}
$this->addTLDWarnings($tldMissing);
$this->domainPart = $domain;
return new ValidEmail();
}
/**
* @psalm-param array|Token<int, string> $token
*/
private function checkNotAllowedChars($token) : Result
{
$notAllowed = [EmailLexer::S_BACKSLASH => true, EmailLexer::S_SLASH=> true];
if (isset($notAllowed[$token['type']])) {
return new InvalidEmail(new CharNotAllowed(), $token['value']);
}
return new ValidEmail();
}
/**
* @return Result
*/
protected function parseDomainLiteral() : Result
{
try {
$this->lexer->find(EmailLexer::S_CLOSEBRACKET);
} catch (\RuntimeException $e) {
return new InvalidEmail(new ExpectingDomainLiteralClose(), $this->lexer->token['value']);
}
$domainLiteralParser = new DomainLiteralParser($this->lexer);
$result = $domainLiteralParser->parse();
$this->warnings = array_merge($this->warnings, $domainLiteralParser->getWarnings());
return $result;
}
protected function checkDomainPartExceptions(array $prev, bool $hasComments) : Result
{
if ($this->lexer->token['type'] === EmailLexer::S_OPENBRACKET && $prev['type'] !== EmailLexer::S_AT) {
return new InvalidEmail(new ExpectingATEXT('OPENBRACKET not after AT'), $this->lexer->token['value']);
}
if ($this->lexer->token['type'] === EmailLexer::S_HYPHEN && $this->lexer->isNextToken(EmailLexer::S_DOT)) {
return new InvalidEmail(new DomainHyphened('Hypen found near DOT'), $this->lexer->token['value']);
}
if ($this->lexer->token['type'] === EmailLexer::S_BACKSLASH
&& $this->lexer->isNextToken(EmailLexer::GENERIC)) {
return new InvalidEmail(new ExpectingATEXT('Escaping following "ATOM"'), $this->lexer->token['value']);
}
return $this->validateTokens($hasComments);
}
protected function validateTokens(bool $hasComments) : Result
{
$validDomainTokens = array(
EmailLexer::GENERIC => true,
EmailLexer::S_HYPHEN => true,
EmailLexer::S_DOT => true,
);
if ($hasComments) {
$validDomainTokens[EmailLexer::S_OPENPARENTHESIS] = true;
$validDomainTokens[EmailLexer::S_CLOSEPARENTHESIS] = true;
}
if (!isset($validDomainTokens[$this->lexer->token['type']])) {
return new InvalidEmail(new ExpectingATEXT('Invalid token in domain: ' . $this->lexer->token['value']), $this->lexer->token['value']);
}
return new ValidEmail();
}
private function checkLabelLength(bool $isEndOfDomain = false) : Result
{
if ($this->lexer->token['type'] === EmailLexer::S_DOT || $isEndOfDomain) {
if ($this->isLabelTooLong($this->label)) {
return new InvalidEmail(new LabelTooLong(), $this->lexer->token['value']);
}
$this->label = '';
}
$this->label .= $this->lexer->token['value'];
return new ValidEmail();
}
private function isLabelTooLong(string $label) : bool
{
if (preg_match('/[^\x00-\x7F]/', $label)) {
idn_to_ascii($label, IDNA_DEFAULT, INTL_IDNA_VARIANT_UTS46, $idnaInfo);
return (bool) ($idnaInfo['errors'] & IDNA_ERROR_LABEL_TOO_LONG);
}
return strlen($label) > self::LABEL_MAX_LENGTH;
}
private function addTLDWarnings(bool $isTLDMissing) : void
{
if ($isTLDMissing) {
$this->warnings[TLD::CODE] = new TLD();
}
}
public function domainPart() : string
{
return $this->domainPart;
}
}
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