ArrayDiffFormatter.php

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<?php
class ArrayDiffFormatter extends DiffFormatter {
 
    public function format( $diff ) {
        $oldline = 1;
        $newline = 1;
        $retval = [];
        foreach ( $diff->getEdits() as $edit ) {
            switch ( $edit->getType() ) {
                case 'add':
                    foreach ( $edit->getClosing() as $line ) {
                        $retval[] = [
                            'action' => 'add',
                            'new' => $line,
                            'newline' => $newline++
                        ];
                    }
                    break;
                case 'delete':
                    foreach ( $edit->getOrig() as $line ) {
                        $retval[] = [
                            'action' => 'delete',
                            'old' => $line,
                            'oldline' => $oldline++,
                        ];
                    }
                    break;
                case 'change':
                    foreach ( $edit->getOrig() as $key => $line ) {
                        $retval[] = [
                            'action' => 'change',
                            'old' => $line,
                            'new' => $edit->getClosing( $key ),
                            'oldline' => $oldline++,
                            'newline' => $newline++,
                        ];
                    }
                    break;
                case 'copy':
                    $oldline += count( $edit->getOrig() );
                    $newline += count( $edit->getOrig() );
            }
        }
 
        return $retval;
    }
 
}