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

namespace DrupalPractice\Sniffs\Objects;

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

/**
 * Checks that \Drupal::service() and friends is not used in forms, controllers, services.
 *
 * @category PHP
 * @package  PHP_CodeSniffer
 * @link     http://pear.php.net/package/PHP_CodeSniffer
 */
class GlobalDrupalSniff implements Sniff
{

    /**
     * List of base classes where \Drupal should not be used in an extending class.
     *
     * @var string[]
     */
    public static $baseClasses = array(
                                  '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
     */
    public function register()
    {
        return array(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);

        if (($extendsName === false || in_array($extendsName, static::$baseClasses) === false)
            && Project::isServiceClass($phpcsFile, $classPtr) === false
        ) {
            return;
        }

        $warning = '\Drupal calls should be avoided in classes, use dependency injection instead';
        $phpcsFile->addWarning($warning, $stackPtr, 'GlobalDrupal');

    }//end process()


}//end class