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<?php
namespace Egulias\EmailValidator\Parser;
use Egulias\EmailValidator\EmailLexer;
use Egulias\EmailValidator\Result\Result;
use Egulias\EmailValidator\Result\ValidEmail;
use Egulias\EmailValidator\Result\InvalidEmail;
use Egulias\EmailValidator\Warning\LocalTooLong;
use Egulias\EmailValidator\Result\Reason\DotAtEnd;
use Egulias\EmailValidator\Result\Reason\DotAtStart;
use Egulias\EmailValidator\Result\Reason\ConsecutiveDot;
use Egulias\EmailValidator\Result\Reason\ExpectingATEXT;
use Egulias\EmailValidator\Parser\CommentStrategy\LocalComment;
class LocalPart extends PartParser
{
public const INVALID_TOKENS = [
EmailLexer::S_COMMA => EmailLexer::S_COMMA,
EmailLexer::S_CLOSEBRACKET => EmailLexer::S_CLOSEBRACKET,
EmailLexer::S_OPENBRACKET => EmailLexer::S_OPENBRACKET,
EmailLexer::S_GREATERTHAN => EmailLexer::S_GREATERTHAN,
EmailLexer::S_LOWERTHAN => EmailLexer::S_LOWERTHAN,
EmailLexer::S_COLON => EmailLexer::S_COLON,
EmailLexer::S_SEMICOLON => EmailLexer::S_SEMICOLON,
EmailLexer::INVALID => EmailLexer::INVALID
];
/**
* @var string
*/
private $localPart = '';
public function parse() : Result
{
$this->lexer->startRecording();
while (((array) $this->lexer->token)['type'] !== EmailLexer::S_AT && null !== ((array) $this->lexer->token)['type']) {
if ($this->hasDotAtStart()) {
return new InvalidEmail(new DotAtStart(), ((array) $this->lexer->token)['value']);
}
if (((array) $this->lexer->token)['type'] === EmailLexer::S_DQUOTE) {
$dquoteParsingResult = $this->parseDoubleQuote();
//Invalid double quote parsing
if($dquoteParsingResult->isInvalid()) {
return $dquoteParsingResult;
}
}
if (((array) $this->lexer->token)['type'] === EmailLexer::S_OPENPARENTHESIS ||
((array) $this->lexer->token)['type'] === EmailLexer::S_CLOSEPARENTHESIS ) {
$commentsResult = $this->parseComments();
//Invalid comment parsing
if($commentsResult->isInvalid()) {
return $commentsResult;
}
}
if (((array) $this->lexer->token)['type'] === EmailLexer::S_DOT && $this->lexer->isNextToken(EmailLexer::S_DOT)) {
return new InvalidEmail(new ConsecutiveDot(), ((array) $this->lexer->token)['value']);
}
if (((array) $this->lexer->token)['type'] === EmailLexer::S_DOT &&
$this->lexer->isNextToken(EmailLexer::S_AT)
) {
return new InvalidEmail(new DotAtEnd(), ((array) $this->lexer->token)['value']);
}
$resultEscaping = $this->validateEscaping();
if ($resultEscaping->isInvalid()) {
return $resultEscaping;
}
$resultToken = $this->validateTokens(false);
if ($resultToken->isInvalid()) {
return $resultToken;
}
$resultFWS = $this->parseLocalFWS();
if($resultFWS->isInvalid()) {
return $resultFWS;
}
$this->lexer->moveNext();
}
$this->lexer->stopRecording();
$this->localPart = rtrim($this->lexer->getAccumulatedValues(), '@');
if (strlen($this->localPart) > LocalTooLong::LOCAL_PART_LENGTH) {
$this->warnings[LocalTooLong::CODE] = new LocalTooLong();
}
return new ValidEmail();
}
protected function validateTokens(bool $hasComments) : Result
{
if (isset(self::INVALID_TOKENS[((array) $this->lexer->token)['type']])) {
return new InvalidEmail(new ExpectingATEXT('Invalid token found'), ((array) $this->lexer->token)['value']);
}
return new ValidEmail();
}
public function localPart() : string
{
return $this->localPart;
}
private function parseLocalFWS() : Result
{
$foldingWS = new FoldingWhiteSpace($this->lexer);
$resultFWS = $foldingWS->parse();
if ($resultFWS->isValid()) {
$this->warnings = array_merge($this->warnings, $foldingWS->getWarnings());
}
return $resultFWS;
}
private function hasDotAtStart() : bool
{
return ((array) $this->lexer->token)['type'] === EmailLexer::S_DOT && null === $this->lexer->getPrevious()['type'];
}
private function parseDoubleQuote() : Result
{
$dquoteParser = new DoubleQuote($this->lexer);
$parseAgain = $dquoteParser->parse();
$this->warnings = array_merge($this->warnings, $dquoteParser->getWarnings());
return $parseAgain;
}
protected function parseComments(): Result
{
$commentParser = new Comment($this->lexer, new LocalComment());
$result = $commentParser->parse();
$this->warnings = array_merge($this->warnings, $commentParser->getWarnings());
if($result->isInvalid()) {
return $result;
}
return $result;
}
private function validateEscaping() : Result
{
//Backslash found
if (((array) $this->lexer->token)['type'] !== EmailLexer::S_BACKSLASH) {
return new ValidEmail();
}
if ($this->lexer->isNextToken(EmailLexer::GENERIC)) {
return new InvalidEmail(new ExpectingATEXT('Found ATOM after escaping'), ((array) $this->lexer->token)['value']);
}
if (!$this->lexer->isNextTokenAny(array(EmailLexer::S_SP, EmailLexer::S_HTAB, EmailLexer::C_DEL))) {
return new ValidEmail();
}
return new ValidEmail();
}
}