Chris@17: <?php
Chris@17: /**
Chris@17:  * Allows tests that extend this class to listen for tokens within a particular scope.
Chris@17:  *
Chris@17:  * Below is a test that listens to methods that exist only within classes:
Chris@17:  * <code>
Chris@17:  * class ClassScopeTest extends PHP_CodeSniffer_Standards_AbstractScopeSniff
Chris@17:  * {
Chris@17:  *     public function __construct()
Chris@17:  *     {
Chris@17:  *         parent::__construct(array(T_CLASS), array(T_FUNCTION));
Chris@17:  *     }
Chris@17:  *
Chris@17:  *     protected function processTokenWithinScope(\PHP_CodeSniffer\Files\File $phpcsFile, $stackPtr, $currScope)
Chris@17:  *     {
Chris@17:  *         $className = $phpcsFile->getDeclarationName($currScope);
Chris@17:  *         echo 'encountered a method within class '.$className;
Chris@17:  *     }
Chris@17:  * }
Chris@17:  * </code>
Chris@17:  *
Chris@17:  * @author    Greg Sherwood <gsherwood@squiz.net>
Chris@17:  * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
Chris@17:  * @license   https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
Chris@17:  */
Chris@17: 
Chris@17: namespace PHP_CodeSniffer\Sniffs;
Chris@17: 
Chris@17: use PHP_CodeSniffer\Files\File;
Chris@17: use PHP_CodeSniffer\Exceptions\RuntimeException;
Chris@17: 
Chris@17: abstract class AbstractScopeSniff implements Sniff
Chris@17: {
Chris@17: 
Chris@17:     /**
Chris@17:      * The token types that this test wishes to listen to within the scope.
Chris@17:      *
Chris@17:      * @var array
Chris@17:      */
Chris@17:     private $tokens = [];
Chris@17: 
Chris@17:     /**
Chris@17:      * The type of scope opener tokens that this test wishes to listen to.
Chris@17:      *
Chris@17:      * @var string
Chris@17:      */
Chris@17:     private $scopeTokens = [];
Chris@17: 
Chris@17:     /**
Chris@17:      * True if this test should fire on tokens outside of the scope.
Chris@17:      *
Chris@17:      * @var boolean
Chris@17:      */
Chris@17:     private $listenOutside = false;
Chris@17: 
Chris@17: 
Chris@17:     /**
Chris@17:      * Constructs a new AbstractScopeTest.
Chris@17:      *
Chris@17:      * @param array   $scopeTokens   The type of scope the test wishes to listen to.
Chris@17:      * @param array   $tokens        The tokens that the test wishes to listen to
Chris@17:      *                               within the scope.
Chris@17:      * @param boolean $listenOutside If true this test will also alert the
Chris@17:      *                               extending class when a token is found outside
Chris@17:      *                               the scope, by calling the
Chris@17:      *                               processTokenOutsideScope method.
Chris@17:      *
Chris@17:      * @see    PHP_CodeSniffer.getValidScopeTokeners()
Chris@17:      * @throws \PHP_CodeSniffer\Exceptions\RuntimeException If the specified tokens array is empty.
Chris@17:      */
Chris@17:     public function __construct(
Chris@17:         array $scopeTokens,
Chris@17:         array $tokens,
Chris@17:         $listenOutside=false
Chris@17:     ) {
Chris@17:         if (empty($scopeTokens) === true) {
Chris@17:             $error = 'The scope tokens list cannot be empty';
Chris@17:             throw new RuntimeException($error);
Chris@17:         }
Chris@17: 
Chris@17:         if (empty($tokens) === true) {
Chris@17:             $error = 'The tokens list cannot be empty';
Chris@17:             throw new RuntimeException($error);
Chris@17:         }
Chris@17: 
Chris@17:         $invalidScopeTokens = array_intersect($scopeTokens, $tokens);
Chris@17:         if (empty($invalidScopeTokens) === false) {
Chris@17:             $invalid = implode(', ', $invalidScopeTokens);
Chris@17:             $error   = "Scope tokens [$invalid] can't be in the tokens array";
Chris@17:             throw new RuntimeException($error);
Chris@17:         }
Chris@17: 
Chris@17:         $this->listenOutside = $listenOutside;
Chris@17:         $this->scopeTokens   = array_flip($scopeTokens);
Chris@17:         $this->tokens        = $tokens;
Chris@17: 
Chris@17:     }//end __construct()
Chris@17: 
Chris@17: 
Chris@17:     /**
Chris@17:      * The method that is called to register the tokens this test wishes to
Chris@17:      * listen to.
Chris@17:      *
Chris@17:      * DO NOT OVERRIDE THIS METHOD. Use the constructor of this class to register
Chris@17:      * for the desired tokens and scope.
Chris@17:      *
Chris@17:      * @return int[]
Chris@17:      * @see    __constructor()
Chris@17:      */
Chris@17:     final public function register()
Chris@17:     {
Chris@17:         return $this->tokens;
Chris@17: 
Chris@17:     }//end register()
Chris@17: 
Chris@17: 
Chris@17:     /**
Chris@17:      * Processes the tokens that this test is listening for.
Chris@17:      *
Chris@17:      * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where this token was found.
Chris@17:      * @param int                         $stackPtr  The position in the stack where this
Chris@17:      *                                               token was found.
Chris@17:      *
Chris@17:      * @return void|int Optionally returns a stack pointer. The sniff will not be
Chris@17:      *                  called again on the current file until the returned stack
Chris@17:      *                  pointer is reached. Return ($phpcsFile->numTokens + 1) to skip
Chris@17:      *                  the rest of the file.
Chris@17:      * @see    processTokenWithinScope()
Chris@17:      */
Chris@17:     final public function process(File $phpcsFile, $stackPtr)
Chris@17:     {
Chris@17:         $tokens = $phpcsFile->getTokens();
Chris@17: 
Chris@17:         $foundScope = false;
Chris@17:         $skipPtrs   = [];
Chris@17:         foreach ($tokens[$stackPtr]['conditions'] as $scope => $code) {
Chris@17:             if (isset($this->scopeTokens[$code]) === true) {
Chris@17:                 $skipPtrs[] = $this->processTokenWithinScope($phpcsFile, $stackPtr, $scope);
Chris@17:                 $foundScope = true;
Chris@17:             }
Chris@17:         }
Chris@17: 
Chris@17:         if ($this->listenOutside === true && $foundScope === false) {
Chris@17:             $skipPtrs[] = $this->processTokenOutsideScope($phpcsFile, $stackPtr);
Chris@17:         }
Chris@17: 
Chris@17:         if (empty($skipPtrs) === false) {
Chris@17:             return min($skipPtrs);
Chris@17:         }
Chris@17: 
Chris@17:         return;
Chris@17: 
Chris@17:     }//end process()
Chris@17: 
Chris@17: 
Chris@17:     /**
Chris@17:      * Processes a token that is found within the scope that this test is
Chris@17:      * listening to.
Chris@17:      *
Chris@17:      * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where this token was found.
Chris@17:      * @param int                         $stackPtr  The position in the stack where this
Chris@17:      *                                               token was found.
Chris@17:      * @param int                         $currScope The position in the tokens array that
Chris@17:      *                                               opened the scope that this test is
Chris@17:      *                                               listening for.
Chris@17:      *
Chris@17:      * @return void|int Optionally returns a stack pointer. The sniff will not be
Chris@17:      *                  called again on the current file until the returned stack
Chris@17:      *                  pointer is reached. Return ($phpcsFile->numTokens + 1) to skip
Chris@17:      *                  the rest of the file.
Chris@17:      */
Chris@17:     abstract protected function processTokenWithinScope(File $phpcsFile, $stackPtr, $currScope);
Chris@17: 
Chris@17: 
Chris@17:     /**
Chris@17:      * Processes a token that is found outside the scope that this test is
Chris@17:      * listening to.
Chris@17:      *
Chris@17:      * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where this token was found.
Chris@17:      * @param int                         $stackPtr  The position in the stack where this
Chris@17:      *                                               token was found.
Chris@17:      *
Chris@17:      * @return void|int Optionally returns a stack pointer. The sniff will not be
Chris@17:      *                  called again on the current file until the returned stack
Chris@17:      *                  pointer is reached. Return (count($tokens) + 1) to skip
Chris@17:      *                  the rest of the file.
Chris@17:      */
Chris@17:     abstract protected function processTokenOutsideScope(File $phpcsFile, $stackPtr);
Chris@17: 
Chris@17: 
Chris@17: }//end class