<?php

class DocBookXml2Array extends AgaviConfigHandler {

	protected $chapterNumber = 0;

	public function execute($config, $context = null)
	{
		return '<?php return ' . var_export($this->getSections($config), true) . ' ?>';
	}

	public function getSections($filename)
	{
		$result = array();

		$book = new SimpleXMLElement(file_get_contents($filename));

		//preface
		$id = (string) $book->preface['id'];
		$title = (string) $book->preface->title;
		$result[$id] = array(
				'title'=>$title,
				'parent' => null,
				'path' => $title
			);

		//preface's sections
		foreach ($book->preface->section as $section) {
			$result += $this->parseSection($section, $id, $title);
		}

		//chapters
		foreach ($book->chapter as $chapter) {
			$result += $this->parseChapter($chapter);
		}

		return $result;
	}

	protected function parseChapter(SimpleXMLElement $chapter)
	{
		$result = array();

		$id = (string) $chapter['id'];
		$title = ++$this->chapterNumber .'. '. (string) $chapter->title;

		$result[$id] = array(
				'title'=> $title,
				'parent' => null,
				'path' => $title,
			);
		foreach ($chapter->section as $section) {
			$result += $this->parseSection($section, $id, $title);
		}

		return $result;
	}

	protected function parseSection(SimpleXMLElement $section, $parentId, $path)
	{
		$result = array();

		$id = (string) $section['id'];
		$title = (string) $section->title;
		$path .= ' / ' . (string) $section->title;

		$result[$id] = array(
				'title' => $title,
				'parent' => $parentId,
				'path' => $path,
			);

		if ($section->section) {
			foreach ($section->section as $innerSection) {
				$result += $this->parseSection($innerSection, $id, $path);
			}
		}

		return $result;
	}


}


?>