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✏️ Editing: AbstractScopeSniff.php

<?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);
 *         $phpcsFile->addWarning('encountered a method within class '.$className, $stackPtr, 'MethodFound');
 *     }
 * }
 * </code>
 *
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/HEAD/licence.txt BSD Licence
 */

namespace PHP_CodeSniffer\Sniffs;

use PHP_CodeSniffer\Exceptions\RuntimeException;
use PHP_CodeSniffer\Files\File;

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 array<int|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 array<int|string>
     * @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` 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);
        }

}//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` 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                         $stackPtr  The position in the stack where this
     *                                               token was found.
     *
     * @return void|int Optionally returns a stack pointer. The sniff will not be
     *                  called again on the current file until the returned stack
     *                  pointer is reached. Return `$phpcsFile->numTokens` to skip
     *                  the rest of the file.
     */
    abstract protected function processTokenOutsideScope(File $phpcsFile, $stackPtr);

}//end class

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