The start of something beautiful

2024-09-11 22:48:07 -06:00
parent 45acea47f3
commit f5997ee5ec
5614 changed files with 630696 additions and 0 deletions
@@ -0,0 +1,162 @@
+<?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
+    {
+        $this->lexer->startRecording();
+
+        while (!$this->lexer->current->isA(EmailLexer::S_AT) && !$this->lexer->current->isA(EmailLexer::S_EMPTY)) {
+            if ($this->hasDotAtStart()) {
+                return new InvalidEmail(new DotAtStart(), $this->lexer->current->value);
+            }
+
+            if ($this->lexer->current->isA(EmailLexer::S_DQUOTE)) {
+                $dquoteParsingResult = $this->parseDoubleQuote();
+
+                //Invalid double quote parsing
+                if ($dquoteParsingResult->isInvalid()) {
+                    return $dquoteParsingResult;
+                }
+            }
+
+            if (
+                $this->lexer->current->isA(EmailLexer::S_OPENPARENTHESIS) ||
+                $this->lexer->current->isA(EmailLexer::S_CLOSEPARENTHESIS)
+            ) {
+                $commentsResult = $this->parseComments();
+
+                //Invalid comment parsing
+                if ($commentsResult->isInvalid()) {
+                    return $commentsResult;
+                }
+            }
+
+            if ($this->lexer->current->isA(EmailLexer::S_DOT) && $this->lexer->isNextToken(EmailLexer::S_DOT)) {
+                return new InvalidEmail(new ConsecutiveDot(), $this->lexer->current->value);
+            }
+
+            if (
+                $this->lexer->current->isA(EmailLexer::S_DOT) &&
+                $this->lexer->isNextToken(EmailLexer::S_AT)
+            ) {
+                return new InvalidEmail(new DotAtEnd(), $this->lexer->current->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 $hasComments): Result
+    {
+        if (isset(self::INVALID_TOKENS[$this->lexer->current->type])) {
+            return new InvalidEmail(new ExpectingATEXT('Invalid token found'), $this->lexer->current->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()) {
+            $this->warnings = [...$this->warnings, ...$foldingWS->getWarnings()];
+        }
+        return $resultFWS;
+    }
+
+    private function hasDotAtStart(): bool
+    {
+        return $this->lexer->current->isA(EmailLexer::S_DOT) && $this->lexer->getPrevious()->isA(EmailLexer::S_EMPTY);
+    }
+
+    private function parseDoubleQuote(): Result
+    {
+        $dquoteParser = new DoubleQuote($this->lexer);
+        $parseAgain = $dquoteParser->parse();
+        $this->warnings = [...$this->warnings, ...$dquoteParser->getWarnings()];
+
+        return $parseAgain;
+    }
+
+    protected function parseComments(): Result
+    {
+        $commentParser = new Comment($this->lexer, new LocalComment());
+        $result = $commentParser->parse();
+        $this->warnings = [...$this->warnings, ...$commentParser->getWarnings()];
+
+        return $result;
+    }
+
+    private function validateEscaping(): Result
+    {
+        //Backslash found
+        if (!$this->lexer->current->isA(EmailLexer::S_BACKSLASH)) {
+            return new ValidEmail();
+        }
+
+        if ($this->lexer->isNextToken(EmailLexer::GENERIC)) {
+            return new InvalidEmail(new ExpectingATEXT('Found ATOM after escaping'), $this->lexer->current->value);
+        }
+
+        return new ValidEmail();
+    }
+}