updated-packages

vendor/egulias/email-validator/src/Parser/DomainPart.php

@@ -0,0 +1,443 @@
+<?php
+
+namespace Egulias\EmailValidator\Parser;
+
+use Egulias\EmailValidator\EmailLexer;
+use Egulias\EmailValidator\Exception\CharNotAllowed;
+use Egulias\EmailValidator\Exception\CommaInDomain;
+use Egulias\EmailValidator\Exception\ConsecutiveAt;
+use Egulias\EmailValidator\Exception\CRLFAtTheEnd;
+use Egulias\EmailValidator\Exception\CRNoLF;
+use Egulias\EmailValidator\Exception\DomainHyphened;
+use Egulias\EmailValidator\Exception\DotAtEnd;
+use Egulias\EmailValidator\Exception\DotAtStart;
+use Egulias\EmailValidator\Exception\ExpectingATEXT;
+use Egulias\EmailValidator\Exception\ExpectingDomainLiteralClose;
+use Egulias\EmailValidator\Exception\ExpectingDTEXT;
+use Egulias\EmailValidator\Exception\NoDomainPart;
+use Egulias\EmailValidator\Exception\UnopenedComment;
+use Egulias\EmailValidator\Warning\AddressLiteral;
+use Egulias\EmailValidator\Warning\CFWSWithFWS;
+use Egulias\EmailValidator\Warning\DeprecatedComment;
+use Egulias\EmailValidator\Warning\DomainLiteral;
+use Egulias\EmailValidator\Warning\DomainTooLong;
+use Egulias\EmailValidator\Warning\IPV6BadChar;
+use Egulias\EmailValidator\Warning\IPV6ColonEnd;
+use Egulias\EmailValidator\Warning\IPV6ColonStart;
+use Egulias\EmailValidator\Warning\IPV6Deprecated;
+use Egulias\EmailValidator\Warning\IPV6DoubleColon;
+use Egulias\EmailValidator\Warning\IPV6GroupCount;
+use Egulias\EmailValidator\Warning\IPV6MaxGroups;
+use Egulias\EmailValidator\Warning\LabelTooLong;
+use Egulias\EmailValidator\Warning\ObsoleteDTEXT;
+use Egulias\EmailValidator\Warning\TLD;
+
+class DomainPart extends Parser
+{
+    const DOMAIN_MAX_LENGTH = 254;
+    const LABEL_MAX_LENGTH = 63;
+
+    /**
+     * @var string
+     */
+    protected $domainPart = '';
+
+    public function parse($domainPart)
+    {
+        $this->lexer->moveNext();
+
+        $this->performDomainStartChecks();
+
+        $domain = $this->doParseDomainPart();
+
+        $prev = $this->lexer->getPrevious();
+        $length = strlen($domain);
+
+        if ($prev['type'] === EmailLexer::S_DOT) {
+            throw new DotAtEnd();
+        }
+        if ($prev['type'] === EmailLexer::S_HYPHEN) {
+            throw new DomainHyphened();
+        }
+        if ($length > self::DOMAIN_MAX_LENGTH) {
+            $this->warnings[DomainTooLong::CODE] = new DomainTooLong();
+        }
+        if ($prev['type'] === EmailLexer::S_CR) {
+            throw new CRLFAtTheEnd();
+        }
+        $this->domainPart = $domain;
+    }
+
+    private function performDomainStartChecks()
+    {
+        $this->checkInvalidTokensAfterAT();
+        $this->checkEmptyDomain();
+
+        if ($this->lexer->token['type'] === EmailLexer::S_OPENPARENTHESIS) {
+            $this->warnings[DeprecatedComment::CODE] = new DeprecatedComment();
+            $this->parseDomainComments();
+        }
+    }
+
+    private function checkEmptyDomain()
+    {
+        $thereIsNoDomain = $this->lexer->token['type'] === EmailLexer::S_EMPTY ||
+            ($this->lexer->token['type'] === EmailLexer::S_SP &&
+            !$this->lexer->isNextToken(EmailLexer::GENERIC));
+
+        if ($thereIsNoDomain) {
+            throw new NoDomainPart();
+        }
+    }
+
+    private function checkInvalidTokensAfterAT()
+    {
+        if ($this->lexer->token['type'] === EmailLexer::S_DOT) {
+            throw new DotAtStart();
+        }
+        if ($this->lexer->token['type'] === EmailLexer::S_HYPHEN) {
+            throw new DomainHyphened();
+        }
+    }
+
+    /**
+     * @return string
+     */
+    public function getDomainPart()
+    {
+        return $this->domainPart;
+    }
+
+    /**
+     * @param string $addressLiteral
+     * @param int $maxGroups
+     */
+    public function checkIPV6Tag($addressLiteral, $maxGroups = 8)
+    {
+        $prev = $this->lexer->getPrevious();
+        if ($prev['type'] === EmailLexer::S_COLON) {
+            $this->warnings[IPV6ColonEnd::CODE] = new IPV6ColonEnd();
+        }
+
+        $IPv6       = substr($addressLiteral, 5);
+        //Daniel Marschall's new IPv6 testing strategy
+        $matchesIP  = explode(':', $IPv6);
+        $groupCount = count($matchesIP);
+        $colons     = strpos($IPv6, '::');
+
+        if (count(preg_grep('/^[0-9A-Fa-f]{0,4}$/', $matchesIP, PREG_GREP_INVERT)) !== 0) {
+            $this->warnings[IPV6BadChar::CODE] = new IPV6BadChar();
+        }
+
+        if ($colons === false) {
+            // We need exactly the right number of groups
+            if ($groupCount !== $maxGroups) {
+                $this->warnings[IPV6GroupCount::CODE] = new IPV6GroupCount();
+            }
+            return;
+        }
+
+        if ($colons !== strrpos($IPv6, '::')) {
+            $this->warnings[IPV6DoubleColon::CODE] = new IPV6DoubleColon();
+            return;
+        }
+
+        if ($colons === 0 || $colons === (strlen($IPv6) - 2)) {
+            // RFC 4291 allows :: at the start or end of an address
+            //with 7 other groups in addition
+            ++$maxGroups;
+        }
+
+        if ($groupCount > $maxGroups) {
+            $this->warnings[IPV6MaxGroups::CODE] = new IPV6MaxGroups();
+        } elseif ($groupCount === $maxGroups) {
+            $this->warnings[IPV6Deprecated::CODE] = new IPV6Deprecated();
+        }
+    }
+
+    /**
+     * @return string
+     */
+    protected function doParseDomainPart()
+    {
+        $domain = '';
+        $label = '';
+        $openedParenthesis = 0;
+        do {
+            $prev = $this->lexer->getPrevious();
+
+            $this->checkNotAllowedChars($this->lexer->token);
+
+            if ($this->lexer->token['type'] === EmailLexer::S_OPENPARENTHESIS) {
+                $this->parseComments();
+                $openedParenthesis += $this->getOpenedParenthesis();
+                $this->lexer->moveNext();
+                $tmpPrev = $this->lexer->getPrevious();
+                if ($tmpPrev['type'] === EmailLexer::S_CLOSEPARENTHESIS) {
+                    $openedParenthesis--;
+                }
+            }
+            if ($this->lexer->token['type'] === EmailLexer::S_CLOSEPARENTHESIS) {
+                if ($openedParenthesis === 0) {
+                    throw new UnopenedComment();
+                } else {
+                    $openedParenthesis--;
+                }
+            }
+
+            $this->checkConsecutiveDots();
+            $this->checkDomainPartExceptions($prev);
+
+            if ($this->hasBrackets()) {
+                $this->parseDomainLiteral();
+            }
+
+            if ($this->lexer->token['type'] === EmailLexer::S_DOT) {
+                $this->checkLabelLength($label);
+                $label = '';
+            } else {
+                $label .= $this->lexer->token['value'];
+            }
+
+            if ($this->isFWS()) {
+                $this->parseFWS();
+            }
+
+            $domain .= $this->lexer->token['value'];
+            $this->lexer->moveNext();
+            if ($this->lexer->token['type'] === EmailLexer::S_SP) {
+                throw new CharNotAllowed();
+            }
+        } while (null !== $this->lexer->token['type']);
+
+        $this->checkLabelLength($label);
+
+        return $domain;
+    }
+
+    private function checkNotAllowedChars(array $token)
+    {
+        $notAllowed = [EmailLexer::S_BACKSLASH => true, EmailLexer::S_SLASH=> true];
+        if (isset($notAllowed[$token['type']])) {
+            throw new CharNotAllowed();
+        }
+    }
+
+    /**
+     * @return string|false
+     */
+    protected function parseDomainLiteral()
+    {
+        if ($this->lexer->isNextToken(EmailLexer::S_COLON)) {
+            $this->warnings[IPV6ColonStart::CODE] = new IPV6ColonStart();
+        }
+        if ($this->lexer->isNextToken(EmailLexer::S_IPV6TAG)) {
+            $lexer = clone $this->lexer;
+            $lexer->moveNext();
+            if ($lexer->isNextToken(EmailLexer::S_DOUBLECOLON)) {
+                $this->warnings[IPV6ColonStart::CODE] = new IPV6ColonStart();
+            }
+        }
+
+        return $this->doParseDomainLiteral();
+    }
+
+    /**
+     * @return string|false
+     */
+    protected function doParseDomainLiteral()
+    {
+        $IPv6TAG = false;
+        $addressLiteral = '';
+        do {
+            if ($this->lexer->token['type'] === EmailLexer::C_NUL) {
+                throw new ExpectingDTEXT();
+            }
+
+            if ($this->lexer->token['type'] === EmailLexer::INVALID ||
+                $this->lexer->token['type'] === EmailLexer::C_DEL   ||
+                $this->lexer->token['type'] === EmailLexer::S_LF
+            ) {
+                $this->warnings[ObsoleteDTEXT::CODE] = new ObsoleteDTEXT();
+            }
+
+            if ($this->lexer->isNextTokenAny(array(EmailLexer::S_OPENQBRACKET, EmailLexer::S_OPENBRACKET))) {
+                throw new ExpectingDTEXT();
+            }
+
+            if ($this->lexer->isNextTokenAny(
+                array(EmailLexer::S_HTAB, EmailLexer::S_SP, $this->lexer->token['type'] === EmailLexer::CRLF)
+            )) {
+                $this->warnings[CFWSWithFWS::CODE] = new CFWSWithFWS();
+                $this->parseFWS();
+            }
+
+            if ($this->lexer->isNextToken(EmailLexer::S_CR)) {
+                throw new CRNoLF();
+            }
+
+            if ($this->lexer->token['type'] === EmailLexer::S_BACKSLASH) {
+                $this->warnings[ObsoleteDTEXT::CODE] = new ObsoleteDTEXT();
+                $addressLiteral .= $this->lexer->token['value'];
+                $this->lexer->moveNext();
+                $this->validateQuotedPair();
+            }
+            if ($this->lexer->token['type'] === EmailLexer::S_IPV6TAG) {
+                $IPv6TAG = true;
+            }
+            if ($this->lexer->token['type'] === EmailLexer::S_CLOSEQBRACKET) {
+                break;
+            }
+
+            $addressLiteral .= $this->lexer->token['value'];
+
+        } while ($this->lexer->moveNext());
+
+        $addressLiteral = str_replace('[', '', $addressLiteral);
+        $addressLiteral = $this->checkIPV4Tag($addressLiteral);
+
+        if (false === $addressLiteral) {
+            return $addressLiteral;
+        }
+
+        if (!$IPv6TAG) {
+            $this->warnings[DomainLiteral::CODE] = new DomainLiteral();
+            return $addressLiteral;
+        }
+
+        $this->warnings[AddressLiteral::CODE] = new AddressLiteral();
+
+        $this->checkIPV6Tag($addressLiteral);
+
+        return $addressLiteral;
+    }
+
+    /**
+     * @param string $addressLiteral
+     *
+     * @return string|false
+     */
+    protected function checkIPV4Tag($addressLiteral)
+    {
+        $matchesIP  = array();
+
+        // Extract IPv4 part from the end of the address-literal (if there is one)
+        if (preg_match(
+            '/\\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/',
+            $addressLiteral,
+            $matchesIP
+        ) > 0
+        ) {
+            $index = strrpos($addressLiteral, $matchesIP[0]);
+            if ($index === 0) {
+                $this->warnings[AddressLiteral::CODE] = new AddressLiteral();
+                return false;
+            }
+            // Convert IPv4 part to IPv6 format for further testing
+            $addressLiteral = substr($addressLiteral, 0, (int) $index) . '0:0';
+        }
+
+        return $addressLiteral;
+    }
+
+    protected function checkDomainPartExceptions(array $prev)
+    {
+        $invalidDomainTokens = array(
+            EmailLexer::S_DQUOTE => true,
+            EmailLexer::S_SQUOTE => true,
+            EmailLexer::S_BACKTICK => true,
+            EmailLexer::S_SEMICOLON => true,
+            EmailLexer::S_GREATERTHAN => true,
+            EmailLexer::S_LOWERTHAN => true,
+        );
+
+        if (isset($invalidDomainTokens[$this->lexer->token['type']])) {
+            throw new ExpectingATEXT();
+        }
+
+        if ($this->lexer->token['type'] === EmailLexer::S_COMMA) {
+            throw new CommaInDomain();
+        }
+
+        if ($this->lexer->token['type'] === EmailLexer::S_AT) {
+            throw new ConsecutiveAt();
+        }
+
+        if ($this->lexer->token['type'] === EmailLexer::S_OPENQBRACKET && $prev['type'] !== EmailLexer::S_AT) {
+            throw new ExpectingATEXT();
+        }
+
+        if ($this->lexer->token['type'] === EmailLexer::S_HYPHEN && $this->lexer->isNextToken(EmailLexer::S_DOT)) {
+            throw new DomainHyphened();
+        }
+
+        if ($this->lexer->token['type'] === EmailLexer::S_BACKSLASH
+            && $this->lexer->isNextToken(EmailLexer::GENERIC)) {
+            throw new ExpectingATEXT();
+        }
+    }
+
+    /**
+     * @return bool
+     */
+    protected function hasBrackets()
+    {
+        if ($this->lexer->token['type'] !== EmailLexer::S_OPENBRACKET) {
+            return false;
+        }
+
+        try {
+            $this->lexer->find(EmailLexer::S_CLOSEBRACKET);
+        } catch (\RuntimeException $e) {
+            throw new ExpectingDomainLiteralClose();
+        }
+
+        return true;
+    }
+
+    /**
+     * @param string $label
+     */
+    protected function checkLabelLength($label)
+    {
+        if ($this->isLabelTooLong($label)) {
+            $this->warnings[LabelTooLong::CODE] = new LabelTooLong();
+        }
+    }
+
+    /**
+     * @param string $label
+     * @return bool
+     */
+    private function isLabelTooLong($label)
+    {
+        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;
+    }
+
+    protected function parseDomainComments()
+    {
+        $this->isUnclosedComment();
+        while (!$this->lexer->isNextToken(EmailLexer::S_CLOSEPARENTHESIS)) {
+            $this->warnEscaping();
+            $this->lexer->moveNext();
+        }
+
+        $this->lexer->moveNext();
+        if ($this->lexer->isNextToken(EmailLexer::S_DOT)) {
+            throw new ExpectingATEXT();
+        }
+    }
+
+    protected function addTLDWarnings()
+    {
+        if ($this->warnings[DomainLiteral::CODE]) {
+            $this->warnings[TLD::CODE] = new TLD();
+        }
+    }
+}

vendor/egulias/email-validator/src/Parser/LocalPart.php

@@ -0,0 +1,145 @@
+<?php
+
+namespace Egulias\EmailValidator\Parser;
+
+use Egulias\EmailValidator\Exception\DotAtEnd;
+use Egulias\EmailValidator\Exception\DotAtStart;
+use Egulias\EmailValidator\EmailLexer;
+use Egulias\EmailValidator\Exception\ExpectingAT;
+use Egulias\EmailValidator\Exception\ExpectingATEXT;
+use Egulias\EmailValidator\Exception\UnclosedQuotedString;
+use Egulias\EmailValidator\Exception\UnopenedComment;
+use Egulias\EmailValidator\Warning\CFWSWithFWS;
+use Egulias\EmailValidator\Warning\LocalTooLong;
+
+class LocalPart extends Parser
+{
+    public function parse($localPart)
+    {
+        $parseDQuote = true;
+        $closingQuote = false;
+        $openedParenthesis = 0;
+        $totalLength = 0;
+
+        while ($this->lexer->token['type'] !== EmailLexer::S_AT && null !== $this->lexer->token['type']) {
+            if ($this->lexer->token['type'] === EmailLexer::S_DOT && null === $this->lexer->getPrevious()['type']) {
+                throw new DotAtStart();
+            }
+
+            $closingQuote = $this->checkDQUOTE($closingQuote);
+            if ($closingQuote && $parseDQuote) {
+                $parseDQuote = $this->parseDoubleQuote();
+            }
+
+            if ($this->lexer->token['type'] === EmailLexer::S_OPENPARENTHESIS) {
+                $this->parseComments();
+                $openedParenthesis += $this->getOpenedParenthesis();
+            }
+
+            if ($this->lexer->token['type'] === EmailLexer::S_CLOSEPARENTHESIS) {
+                if ($openedParenthesis === 0) {
+                    throw new UnopenedComment();
+                }
+
+                $openedParenthesis--;
+            }
+
+            $this->checkConsecutiveDots();
+
+            if ($this->lexer->token['type'] === EmailLexer::S_DOT &&
+                $this->lexer->isNextToken(EmailLexer::S_AT)
+            ) {
+                throw new DotAtEnd();
+            }
+
+            $this->warnEscaping();
+            $this->isInvalidToken($this->lexer->token, $closingQuote);
+
+            if ($this->isFWS()) {
+                $this->parseFWS();
+            }
+
+            $totalLength += strlen($this->lexer->token['value']);
+            $this->lexer->moveNext();
+        }
+
+        if ($totalLength > LocalTooLong::LOCAL_PART_LENGTH) {
+            $this->warnings[LocalTooLong::CODE] = new LocalTooLong();
+        }
+    }
+
+    /**
+     * @return bool
+     */
+    protected function parseDoubleQuote()
+    {
+        $parseAgain = true;
+        $special = array(
+            EmailLexer::S_CR => true,
+            EmailLexer::S_HTAB => true,
+            EmailLexer::S_LF => true
+        );
+
+        $invalid = array(
+            EmailLexer::C_NUL => true,
+            EmailLexer::S_HTAB => true,
+            EmailLexer::S_CR => true,
+            EmailLexer::S_LF => true
+        );
+        $setSpecialsWarning = true;
+
+        $this->lexer->moveNext();
+
+        while ($this->lexer->token['type'] !== EmailLexer::S_DQUOTE && null !== $this->lexer->token['type']) {
+            $parseAgain = false;
+            if (isset($special[$this->lexer->token['type']]) && $setSpecialsWarning) {
+                $this->warnings[CFWSWithFWS::CODE] = new CFWSWithFWS();
+                $setSpecialsWarning = false;
+            }
+            if ($this->lexer->token['type'] === EmailLexer::S_BACKSLASH && $this->lexer->isNextToken(EmailLexer::S_DQUOTE)) {
+                $this->lexer->moveNext();
+            }
+
+            $this->lexer->moveNext();
+
+            if (!$this->escaped() && isset($invalid[$this->lexer->token['type']])) {
+                throw new ExpectingATEXT();
+            }
+        }
+
+        $prev = $this->lexer->getPrevious();
+
+        if ($prev['type'] === EmailLexer::S_BACKSLASH) {
+            if (!$this->checkDQUOTE(false)) {
+                throw new UnclosedQuotedString();
+            }
+        }
+
+        if (!$this->lexer->isNextToken(EmailLexer::S_AT) && $prev['type'] !== EmailLexer::S_BACKSLASH) {
+            throw new ExpectingAT();
+        }
+
+        return $parseAgain;
+    }
+
+    /**
+     * @param bool $closingQuote
+     */
+    protected function isInvalidToken(array $token, $closingQuote)
+    {
+        $forbidden = array(
+            EmailLexer::S_COMMA,
+            EmailLexer::S_CLOSEBRACKET,
+            EmailLexer::S_OPENBRACKET,
+            EmailLexer::S_GREATERTHAN,
+            EmailLexer::S_LOWERTHAN,
+            EmailLexer::S_COLON,
+            EmailLexer::S_SEMICOLON,
+            EmailLexer::INVALID
+        );
+
+        if (in_array($token['type'], $forbidden) && !$closingQuote) {
+            throw new ExpectingATEXT();
+        }
+    }
+}

vendor/egulias/email-validator/src/Parser/Parser.php

@@ -0,0 +1,249 @@
+<?php
+
+namespace Egulias\EmailValidator\Parser;
+
+use Egulias\EmailValidator\EmailLexer;
+use Egulias\EmailValidator\Exception\AtextAfterCFWS;
+use Egulias\EmailValidator\Exception\ConsecutiveDot;
+use Egulias\EmailValidator\Exception\CRLFAtTheEnd;
+use Egulias\EmailValidator\Exception\CRLFX2;
+use Egulias\EmailValidator\Exception\CRNoLF;
+use Egulias\EmailValidator\Exception\ExpectingQPair;
+use Egulias\EmailValidator\Exception\ExpectingATEXT;
+use Egulias\EmailValidator\Exception\ExpectingCTEXT;
+use Egulias\EmailValidator\Exception\UnclosedComment;
+use Egulias\EmailValidator\Exception\UnclosedQuotedString;
+use Egulias\EmailValidator\Warning\CFWSNearAt;
+use Egulias\EmailValidator\Warning\CFWSWithFWS;
+use Egulias\EmailValidator\Warning\Comment;
+use Egulias\EmailValidator\Warning\QuotedPart;
+use Egulias\EmailValidator\Warning\QuotedString;
+
+abstract class Parser
+{
+    /**
+     * @var array
+     */
+    protected $warnings = [];
+
+    /**
+     * @var EmailLexer
+     */
+    protected $lexer;
+
+    /**
+     * @var int
+     */
+    protected $openedParenthesis = 0;
+
+    public function __construct(EmailLexer $lexer)
+    {
+        $this->lexer = $lexer;
+    }
+
+    /**
+     * @return \Egulias\EmailValidator\Warning\Warning[]
+     */
+    public function getWarnings()
+    {
+        return $this->warnings;
+    }
+
+    /**
+     * @param string $str
+     */
+    abstract public function parse($str);
+
+    /** @return int */
+    public function getOpenedParenthesis()
+    {
+        return $this->openedParenthesis;
+    }
+
+    /**
+     * validateQuotedPair
+     */
+    protected function validateQuotedPair()
+    {
+        if (!($this->lexer->token['type'] === EmailLexer::INVALID
+            || $this->lexer->token['type'] === EmailLexer::C_DEL)) {
+            throw new ExpectingQPair();
+        }
+
+        $this->warnings[QuotedPart::CODE] =
+            new QuotedPart($this->lexer->getPrevious()['type'], $this->lexer->token['type']);
+    }
+
+    protected function parseComments()
+    {
+        $this->openedParenthesis = 1;
+        $this->isUnclosedComment();
+        $this->warnings[Comment::CODE] = new Comment();
+        while (!$this->lexer->isNextToken(EmailLexer::S_CLOSEPARENTHESIS)) {
+            if ($this->lexer->isNextToken(EmailLexer::S_OPENPARENTHESIS)) {
+                $this->openedParenthesis++;
+            }
+            $this->warnEscaping();
+            $this->lexer->moveNext();
+        }
+
+        $this->lexer->moveNext();
+        if ($this->lexer->isNextTokenAny(array(EmailLexer::GENERIC, EmailLexer::S_EMPTY))) {
+            throw new ExpectingATEXT();
+        }
+
+        if ($this->lexer->isNextToken(EmailLexer::S_AT)) {
+            $this->warnings[CFWSNearAt::CODE] = new CFWSNearAt();
+        }
+    }
+
+    /**
+     * @return bool
+     */
+    protected function isUnclosedComment()
+    {
+        try {
+            $this->lexer->find(EmailLexer::S_CLOSEPARENTHESIS);
+            return true;
+        } catch (\RuntimeException $e) {
+            throw new UnclosedComment();
+        }
+    }
+
+    protected function parseFWS()
+    {
+        $previous = $this->lexer->getPrevious();
+
+        $this->checkCRLFInFWS();
+
+        if ($this->lexer->token['type'] === EmailLexer::S_CR) {
+            throw new CRNoLF();
+        }
+
+        if ($this->lexer->isNextToken(EmailLexer::GENERIC) && $previous['type']  !== EmailLexer::S_AT) {
+            throw new AtextAfterCFWS();
+        }
+
+        if ($this->lexer->token['type'] === EmailLexer::S_LF || $this->lexer->token['type'] === EmailLexer::C_NUL) {
+            throw new ExpectingCTEXT();
+        }
+
+        if ($this->lexer->isNextToken(EmailLexer::S_AT) || $previous['type']  === EmailLexer::S_AT) {
+            $this->warnings[CFWSNearAt::CODE] = new CFWSNearAt();
+        } else {
+            $this->warnings[CFWSWithFWS::CODE] = new CFWSWithFWS();
+        }
+    }
+
+    protected function checkConsecutiveDots()
+    {
+        if ($this->lexer->token['type'] === EmailLexer::S_DOT && $this->lexer->isNextToken(EmailLexer::S_DOT)) {
+            throw new ConsecutiveDot();
+        }
+    }
+
+    /**
+     * @return bool
+     */
+    protected function isFWS()
+    {
+        if ($this->escaped()) {
+            return false;
+        }
+
+        if ($this->lexer->token['type'] === EmailLexer::S_SP ||
+            $this->lexer->token['type'] === EmailLexer::S_HTAB ||
+            $this->lexer->token['type'] === EmailLexer::S_CR ||
+            $this->lexer->token['type'] === EmailLexer::S_LF ||
+            $this->lexer->token['type'] === EmailLexer::CRLF
+        ) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * @return bool
+     */
+    protected function escaped()
+    {
+        $previous = $this->lexer->getPrevious();
+
+        if ($previous && $previous['type'] === EmailLexer::S_BACKSLASH
+            &&
+            $this->lexer->token['type'] !== EmailLexer::GENERIC
+        ) {
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * @return bool
+     */
+    protected function warnEscaping()
+    {
+        if ($this->lexer->token['type'] !== EmailLexer::S_BACKSLASH) {
+            return false;
+        }
+
+        if ($this->lexer->isNextToken(EmailLexer::GENERIC)) {
+            throw new ExpectingATEXT();
+        }
+
+        if (!$this->lexer->isNextTokenAny(array(EmailLexer::S_SP, EmailLexer::S_HTAB, EmailLexer::C_DEL))) {
+            return false;
+        }
+
+        $this->warnings[QuotedPart::CODE] =
+            new QuotedPart($this->lexer->getPrevious()['type'], $this->lexer->token['type']);
+        return true;
+
+    }
+
+    /**
+     * @param bool $hasClosingQuote
+     *
+     * @return bool
+     */
+    protected function checkDQUOTE($hasClosingQuote)
+    {
+        if ($this->lexer->token['type'] !== EmailLexer::S_DQUOTE) {
+            return $hasClosingQuote;
+        }
+        if ($hasClosingQuote) {
+            return $hasClosingQuote;
+        }
+        $previous = $this->lexer->getPrevious();
+        if ($this->lexer->isNextToken(EmailLexer::GENERIC) && $previous['type'] === EmailLexer::GENERIC) {
+            throw new ExpectingATEXT();
+        }
+
+        try {
+            $this->lexer->find(EmailLexer::S_DQUOTE);
+            $hasClosingQuote = true;
+        } catch (\Exception $e) {
+            throw new UnclosedQuotedString();
+        }
+        $this->warnings[QuotedString::CODE] = new QuotedString($previous['value'], $this->lexer->token['value']);
+
+        return $hasClosingQuote;
+    }
+
+    protected function checkCRLFInFWS()
+    {
+        if ($this->lexer->token['type'] !== EmailLexer::CRLF) {
+            return;
+        }
+
+        if (!$this->lexer->isNextTokenAny(array(EmailLexer::S_SP, EmailLexer::S_HTAB))) {
+            throw new CRLFX2();
+        }
+
+        if (!$this->lexer->isNextTokenAny(array(EmailLexer::S_SP, EmailLexer::S_HTAB))) {
+            throw new CRLFAtTheEnd();
+        }
+    }
+}