PHPCompatibility\Sniff::isUseOfGlobalConstant()

Complexity

Conditions	30
Paths	59

Size

Total Lines

116

Duplication

Lines	0
Ratio	0 %

Importance

Changes	2
Bugs	0	Features	0

<?php
    public function isUseOfGlobalConstant(\PHP_CodeSniffer_File $phpcsFile, $stackPtr)
    {
        static $isLowPHPCS, $isLowPHP;

        $tokens = $phpcsFile->getTokens();

        // Check for the existence of the token.
        if (isset($tokens[$stackPtr]) === false) {
            return false;
        }

        // Is this one of the tokens this function handles ?
        if ($tokens[$stackPtr]['code'] !== T_STRING) {
            return false;
        }

        // Check for older PHP, PHPCS version so we can compensate for misidentified tokens.
        if (isset($isLowPHPCS, $isLowPHP) === false) {
            $isLowPHP   = false;
            $isLowPHPCS = false;
            if (version_compare(PHP_VERSION_ID, '50400', '<')) {
                $isLowPHP   = true;
                $isLowPHPCS = version_compare(PHPCSHelper::getVersion(), '2.4.0', '<');
            }
        }

        $next = $phpcsFile->findNext(\PHP_CodeSniffer_Tokens::$emptyTokens, ($stackPtr + 1), null, true);
        if ($next !== false
            && ($tokens[$next]['code'] === T_OPEN_PARENTHESIS
                || $tokens[$next]['code'] === T_DOUBLE_COLON)
        ) {
            // Function call or declaration.
            return false;
        }

        // Array of tokens which if found preceding the $stackPtr indicate that a T_STRING is not a global constant.
        $tokensToIgnore = array(
            'T_NAMESPACE'       => true,
            'T_USE'             => true,
            'T_CLASS'           => true,
            'T_TRAIT'           => true,
            'T_INTERFACE'       => true,
            'T_EXTENDS'         => true,
            'T_IMPLEMENTS'      => true,
            'T_NEW'             => true,
            'T_FUNCTION'        => true,
            'T_DOUBLE_COLON'    => true,
            'T_OBJECT_OPERATOR' => true,
            'T_INSTANCEOF'      => true,
            'T_INSTEADOF'       => true,
            'T_GOTO'            => true,
            'T_AS'              => true,
            'T_PUBLIC'          => true,
            'T_PROTECTED'       => true,
            'T_PRIVATE'         => true,
        );

        $prev = $phpcsFile->findPrevious(\PHP_CodeSniffer_Tokens::$emptyTokens, ($stackPtr - 1), null, true);
        if ($prev !== false
            && (isset($tokensToIgnore[$tokens[$prev]['type']]) === true
                || ($tokens[$prev]['code'] === T_STRING
                    && (($isLowPHPCS === true
                        && $tokens[$prev]['content'] === 'trait')
                    || ($isLowPHP === true
                        && $tokens[$prev]['content'] === 'insteadof'))))
        ) {
            // Not the use of a constant.
            return false;
        }

        if ($prev !== false
            && $tokens[$prev]['code'] === T_NS_SEPARATOR
            && $tokens[($prev - 1)]['code'] === T_STRING
        ) {
            // Namespaced constant of the same name.
            return false;
        }

        if ($prev !== false
            && $tokens[$prev]['code'] === T_CONST
            && $this->isClassConstant($phpcsFile, $prev) === true
        ) {
            // Class constant declaration of the same name.
            return false;
        }

        /*
         * Deal with a number of variations of use statements.
         */
        for ($i = $stackPtr; $i > 0; $i--) {
            if ($tokens[$i]['line'] !== $tokens[$stackPtr]['line']) {
                break;
            }
        }

        $firstOnLine = $phpcsFile->findNext(\PHP_CodeSniffer_Tokens::$emptyTokens, ($i + 1), null, true);
        if ($firstOnLine !== false && $tokens[$firstOnLine]['code'] === T_USE) {
            $nextOnLine = $phpcsFile->findNext(\PHP_CodeSniffer_Tokens::$emptyTokens, ($firstOnLine + 1), null, true);
            if ($nextOnLine !== false) {
                if (($tokens[$nextOnLine]['code'] === T_STRING && $tokens[$nextOnLine]['content'] === 'const')
                    || $tokens[$nextOnLine]['code'] === T_CONST // Happens in some PHPCS versions.
                ) {
                    $hasNsSep = $phpcsFile->findNext(T_NS_SEPARATOR, ($nextOnLine + 1), $stackPtr);
                    if ($hasNsSep !== false) {
                        // Namespaced const (group) use statement.
                        return false;
                    }
                } else {
                    // Not a const use statement.
                    return false;
                }
            }
        }

        return true;
    }