class InterfaceNameSniff

class InterfaceNameSniff implements Sniff {
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_INTERFACE,
        ];
    }
    
    //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();
        $namePtr = $phpcsFile->findNext(T_WHITESPACE, $stackPtr + 1, null, true);
        $name = $tokens[$namePtr]['content'];
        if (substr($name, -9) !== 'Interface') {
            $warn = 'Interface names should always have the suffix "Interface"';
            $phpcsFile->addWarning($warn, $namePtr, 'InterfaceSuffix');
        }
    }
    
    //end process()

}