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