<?php

class Blocksy_WP_Block_Parser extends WP_Block_Parser {
	function parse($document) {
		$result = parent::parse($document);

		$current_index = 0;
		$current_heading_index = 0;

		foreach ($result as $index => $first_level_block) {
			$result[$index]['firstLevelBlock'] = true;

			if (! empty(trim($first_level_block['innerHTML']))) {
				$result[$index]['firstLevelBlockIndex'] = $current_index++;

				if (strpos($first_level_block['blockName'], 'heading') !== false) {
					$result[$index]['firstLevelHeadingIndex'] = $current_heading_index++;
				}
			}
		}

		return $result;
	}
}