wikimedia/mediawiki-extensions-Wikibase

<?php

namespace Wikibase\Repo\ChangeOp;

/**
 * Counts changes to entity that are not language bound
 * (not instance of {@link LanguageBoundChangeOpResult}) in {@link ChangeOpResult} tree.
 *
 * Does not count non-leaf nodes (instances of {@link ChangeOpsResult}).
 * @license GPL-2.0-or-later
 */
class NonLanguageBoundChangesCounter {

    use ChangeOpResultTraversal;

    /**
     * @param ChangeOpResult $changeOpResult
     *
     * @return int count of non-language-bound changes to an entity
     */
    public function countChanges( ChangeOpResult $changeOpResult ) {
        $traversable = $this->makeRecursiveTraversable( $changeOpResult );

        $count = 0;
        foreach ( $traversable as $result ) {
            if ( !$result instanceof ChangeOpsResult &&
                 !$result instanceof LanguageBoundChangeOpResult &&
                 $result->isEntityChanged()
            ) {
                $count += 1;
            }
        }

        return $count;
    }

}