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<?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();
}
}
}
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