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<?php
/**
 * \DrupalPractice\Sniffs\Constants\GlobalConstantSniff
 *
 * @category PHP
 * @package  PHP_CodeSniffer
 * @link     http://pear.php.net/package/PHP_CodeSniffer
 */

namespace DrupalPractice\Sniffs\Constants;

use DrupalPractice\Project;
use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\Sniff;

/**
 * Checks that globally defined constants are not used in Drupal 8 and higher.
 *
 * @category PHP
 * @package  PHP_CodeSniffer
 * @link     http://pear.php.net/package/PHP_CodeSniffer
 */
class GlobalConstantSniff implements Sniff
{


    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array
     */
    public function register()
    {
        return array(T_CONST);

    }//end register()


    /**
     * Processes this test, when one of its tokens is encountered.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The current file being processed.
     * @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();

        // Only check constants in the global scope.
        if (empty($tokens[$stackPtr]['conditions']) === false) {
            return;
        }

        $coreVersion = Project::getCoreVersion($phpcsFile);
        if ($coreVersion !== '8.x') {
            return;
        }

        // Allow constants if they are deprecated.
        $commentEnd = $phpcsFile->findPrevious(T_WHITESPACE, ($stackPtr - 1), null, true);
        if ($commentEnd !== null && $tokens[$commentEnd]['code'] === T_DOC_COMMENT_CLOSE_TAG) {
            // Go through all comment tags and check if one is @deprecated.
            $commentTag = $commentEnd;
            while ($commentTag !== null && $commentTag > $tokens[$commentEnd]['comment_opener']) {
                if ($tokens[$commentTag]['content'] === '@deprecated') {
                    return;
                }

                $commentTag = $phpcsFile->findPrevious(T_DOC_COMMENT_TAG, ($commentTag - 1), $tokens[$commentEnd]['comment_opener']);
            }
        }

        $warning = 'Global constants should not be used, move it to a class or interface';
        $phpcsFile->addWarning($warning, $stackPtr, 'GlobalConstant');

    }//end process()


}//end class