class GlobalDrupalSniff

class GlobalDrupalSniff implements Sniff {
    
    /**
     * List of base classes where \Drupal should not be used in an extending class.
     *
     * @var string[]
     */
    public static $baseClasses = [
        'BlockBase',
        'ConfigFormBase',
        'ContentEntityForm',
        'ControllerBase',
        'EntityForm',
        'EntityReferenceFormatterBase',
        'FileFormatterBase',
        'FormatterBase',
        'FormBase',
        'ImageFormatter',
        'ImageFormatterBase',
        'WidgetBase',
    ];
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_STRING,
        ];
    }
    
    //end register()
    
    /**
     * Processes this test, when one of its tokens is encountered.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned.
     * @param int                         $stackPtr  The position of the current token
     *                                               in the stack passed in $tokens.
     *
     * @return void
     */
    public function process(File $phpcsFile, $stackPtr) {
        $tokens = $phpcsFile->getTokens();
        // We are only interested in Drupal:: static method calls, not in the global
        // scope.
        if ($tokens[$stackPtr]['content'] !== 'Drupal' || $tokens[$stackPtr + 1]['code'] !== T_DOUBLE_COLON || isset($tokens[$stackPtr + 2]) === false || $tokens[$stackPtr + 2]['code'] !== T_STRING || isset($tokens[$stackPtr + 3]) === false || $tokens[$stackPtr + 3]['code'] !== T_OPEN_PARENTHESIS || empty($tokens[$stackPtr]['conditions']) === true) {
            return;
        }
        // Check that this statement is not in a static function.
        foreach ($tokens[$stackPtr]['conditions'] as $conditionPtr => $conditionCode) {
            if ($conditionCode === T_FUNCTION && $phpcsFile->getMethodProperties($conditionPtr)['is_static'] === true) {
                return;
            }
        }
        // Check if the class extends another class and get the name of the class
        // that is extended.
        $classPtr = key($tokens[$stackPtr]['conditions']);
        $extendsName = $phpcsFile->findExtendedClassName($classPtr);
        // Check if the class implements ContainerInjectionInterface.
        $implementedInterfaceNames = $phpcsFile->findImplementedInterfaceNames($classPtr);
        $canAccessContainer = !empty($implementedInterfaceNames) && in_array('ContainerInjectionInterface', $implementedInterfaceNames);
        if (($extendsName === false || in_array($extendsName, static::$baseClasses) === false) && Project::isServiceClass($phpcsFile, $classPtr) === false && $canAccessContainer === false) {
            return;
        }
        $warning = '\\Drupal calls should be avoided in classes, use dependency injection instead';
        $phpcsFile->addWarning($warning, $stackPtr, 'GlobalDrupal');
    }
    
    //end process()

}