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  <?php
namespace Drupal\Sniffs\NamingConventions;
use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Standards\Generic\Sniffs\NamingConventions\CamelCapsFunctionNameSniff;
use PHP_CodeSniffer\Util\Common;
class ValidFunctionNameSniff extends CamelCapsFunctionNameSniff {
  
  protected function processTokenWithinScope(File $phpcsFile, $stackPtr, $currScope) {
    $methodName = $phpcsFile
      ->getDeclarationName($stackPtr);
    if ($methodName === null) {
      
      return;
    }
    $className = $phpcsFile
      ->getDeclarationName($currScope);
    $errorData = array(
      $className . '::' . $methodName,
    );
    
    if (preg_match('|^__|', $methodName) !== 0) {
      $magicPart = strtolower(substr($methodName, 2));
      if (isset($this->magicMethods[$magicPart]) === false && isset($this->methodsDoubleUnderscore[$magicPart]) === false) {
        $error = 'Method name "%s" is invalid; only PHP magic methods should be prefixed with a double underscore';
        $phpcsFile
          ->addError($error, $stackPtr, 'MethodDoubleUnderscore', $errorData);
      }
      return;
    }
    $methodProps = $phpcsFile
      ->getMethodProperties($stackPtr);
    if (Common::isCamelCaps($methodName, false, true, $this->strict) === false) {
      if ($methodProps['scope_specified'] === true) {
        $error = '%s method name "%s" is not in lowerCamel format';
        $data = array(
          ucfirst($methodProps['scope']),
          $errorData[0],
        );
        $phpcsFile
          ->addError($error, $stackPtr, 'ScopeNotCamelCaps', $data);
      }
      else {
        $error = 'Method name "%s" is not in lowerCamel format';
        $phpcsFile
          ->addError($error, $stackPtr, 'NotCamelCaps', $errorData);
      }
      $phpcsFile
        ->recordMetric($stackPtr, 'CamelCase method name', 'no');
      return;
    }
    else {
      $phpcsFile
        ->recordMetric($stackPtr, 'CamelCase method name', 'yes');
    }
  }
  
  
  protected function processTokenOutsideScope(File $phpcsFile, $stackPtr) {
    $functionName = $phpcsFile
      ->getDeclarationName($stackPtr);
    if ($functionName === null) {
      
      return;
    }
    $isApiFile = substr($phpcsFile
      ->getFilename(), -8) === '.api.php';
    $isHookExample = substr($functionName, 0, 5) === 'hook_';
    if ($isApiFile === true && $isHookExample === true) {
      
      return;
    }
    if ($functionName !== strtolower($functionName)) {
      $expected = strtolower(preg_replace('/([^_])([A-Z])/', '$1_$2', $functionName));
      $error = 'Invalid function name, expected %s but found %s';
      $data = array(
        $expected,
        $functionName,
      );
      $phpcsFile
        ->addError($error, $stackPtr, 'InvalidName', $data);
    }
  }
}