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<?php declare(strict_types = 1); |
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namespace Codor\Sniffs\Classes; |
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use PHP_CodeSniffer_Sniff; |
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use PHP_CodeSniffer_File; |
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class PropertyDeclarationSniff implements PHP_CodeSniffer_Sniff |
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{ |
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/** |
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* The decalred member variables in the class. |
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* @var array |
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*/ |
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protected $memberVars = []; |
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/** |
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* The referenced member variables in the class. |
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* @var array |
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*/ |
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protected $referencedMemberVars = []; |
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/** |
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* Visibility Tokens. |
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* @var array |
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*/ |
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protected $visibilityTokens = ['T_PRIVATE', 'T_PUBLIC', 'T_PROTECTED']; |
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/** |
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* Holds the value if the class is extended or not. |
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* @var boolean |
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*/ |
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protected $isExtendedClass = false; |
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/** |
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* Returns the token types that this sniff is interested in. |
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* @return array |
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*/ |
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public function register(): array |
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{ |
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return [T_CLASS]; |
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} |
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/** |
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* Processes the tokens that this sniff is interested in. |
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* |
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* @param PHP_CodeSniffer_File $phpcsFile The file where the token was found. |
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* @param int $stackPtr The position in the stack where |
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* the token was found. |
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* @return void |
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* @SuppressWarnings(PHPMD.UnusedLocalVariable) |
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*/ |
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public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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{ |
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$this->memberVars = []; |
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$this->referencedMemberVars = []; |
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$tokens = $phpcsFile->getTokens(); |
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foreach ($tokens as $index => $token) { |
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$this->handleToken($tokens, $index); |
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} |
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$undeclaredMemberVars = array_diff($this->referencedMemberVars, $this->memberVars); |
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foreach ($undeclaredMemberVars as $undeclaredVariable) { |
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$this->handleError($undeclaredVariable, $phpcsFile, $stackPtr); |
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} |
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} |
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/** |
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* Handle the incoming token. |
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* @param array $tokens List of tokens. |
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* @param integer $index Current token index. |
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* @return void |
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*/ |
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protected function handleToken($tokens, $index) |
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{ |
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$token = $tokens[$index]; |
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if ($token['type'] === 'T_EXTENDS') { |
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$this->isExtendedClass = true; |
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return; |
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} |
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if ($this->isVisibilityToken($token)) { |
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$this->handleVisibilityToken($tokens, $index); |
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return; |
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} |
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if ($token['type'] === 'T_OBJECT_OPERATOR') { |
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$this->handleObjectOperatorToken($tokens, $index); |
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return; |
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} |
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} |
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/** |
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* Determines if the provided token is a visiblity token. |
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* @param array $token Token data. |
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* @return boolean |
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*/ |
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protected function isVisibilityToken($token): bool |
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{ |
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return in_array($token['type'], $this->visibilityTokens); |
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} |
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/** |
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* Handles the logic for a visiblity type token. |
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* @param array $tokens List of tokens. |
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* @param integer $index Current token index. |
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* @return void |
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*/ |
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protected function handleVisibilityToken($tokens, $index) |
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{ |
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$possibleVariable = $tokens[$index + 2]; |
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if ($possibleVariable['type'] !== 'T_VARIABLE') { |
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return; |
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} |
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$this->memberVars[] = str_replace('$', '', $possibleVariable['content']); |
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} |
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/** |
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* Handles the logic for an object operator token. |
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* @param array $tokens List of tokens. |
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* @param integer $index Current token index. |
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* @return void |
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*/ |
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protected function handleObjectOperatorToken($tokens, $index) |
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{ |
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$previousToken = $tokens[$index-1]; |
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$nextToken = $tokens[$index+1]; |
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$tokenAfterNext = $tokens[$index+2]; |
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if ($previousToken['content'] !== '$this') { |
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return; |
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} |
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if (($tokenAfterNext['type'] !== 'T_WHITESPACE') && ($tokenAfterNext['type'] !== 'T_EQUAL')) { |
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return; |
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} |
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$this->referencedMemberVars[] = $nextToken['content']; |
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} |
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/** |
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* If the class is extended from another class then a warning is produced. |
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* Otherwise an error is produced. |
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* @param string $undeclaredVariable Name of the undeclared member variable. |
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* @param PHP_CodeSniffer_File $phpcsFile PHP Code Sniffer File. |
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* @param integer $index Index of where the undeclared variable was found in the file. |
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* @return void |
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*/ |
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protected function handleError($undeclaredVariable, $phpcsFile, $index) |
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{ |
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if ($this->isExtendedClass) { |
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$phpcsFile->addWarning("Class contains undeclared property {$undeclaredVariable}.", $index); |
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return; |
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} |
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$phpcsFile->addError("Class contains undeclared property {$undeclaredVariable}.", $index); |
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} |
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} |
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bmitch /
Codor
