<?php

system::includeLib('treesort');

class documents
{
	/**
	 * @var mysqliConnection
	 */
	private $_db;
	private $_tableName;
	
	public function __construct(&$db)
	{
		$this->_db = &$db;
		$this->_tableName = config::get('documents', 'tableName');
		
		$db->checkTable($this->_tableName, "
			`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
			`title` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
			`body` text COLLATE utf8_unicode_ci NOT NULL,
			`link` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
			`parent_id` int(10) unsigned NOT NULL,
			`is_locked` tinyint(1) unsigned NOT NULL,
			`is_visible` tinyint(1) unsigned NOT NULL,
			`created` datetime NOT NULL,
			`updated` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
			PRIMARY KEY (`id`)
		");
	}
	
	public function create($title)
	{
		$this->_db->insert($this->_tableName,
			array('title' => $title,
				'body' => '',
				'parent_id' => 0,
				'is_locked' => 0,
				'is_visible' => 0,
				'created' => 'FROM_UNIXTIME(' . time() . ')'));
		return $this->_db->lastInsertedId();
	}
	
	public function edit($id, $title, $body, $visible, $parent_id)
	{
		if (empty($title)) {
			$title = trim(substr(strip_tags($body), 0, 10)) . '...';
		}
		
		$array = array(
			'title' => $title,
			'body' => $body,
			'is_visible' => $visible,
			'parent_id' => $parent_id
		);
		
		$document = $this->get($id);
		if ($document['is_locked'] == 0) {
			$array['link'] = $this->_makeLink($title);
		}
		
		$this->_db->update($this->_tableName, $array, 'id = '.$this->_db->quote($id));
	}
	
	public function generateMenu($documents)
	{
		return treesort::sort($documents);
	}
	
	/*public function generateMenu($documents)
	{
		$menu = array();
		$tempOrphans = array();
		$links = array();
		foreach ($documents as $document) {
			if ($document['parent_id'] == 0) {
				$menu[$document['id']] = $document;
				$links[$document['id']] = &$menu[$document['id']];
				
				if (isset($tempOrphans[$document['id']])) {
					$menu[$document['id']]['children'] = $tempOrphans[$document['id']];
				} else {
					$menu[$document['id']]['children'] = array();
				}
			} else {
				if (!isset($links[$document['parent_id']])) {
					$tempOrphans[$document['id']][] = $document;
				} else {
					$links[$document['parent_id']]['children'][] = $document;
				}
			}
		}
		var_dump($menu);die;
		return $menu;
	}
	
	public function generateMenuFlat($documents)
	{*/
		/*$menu = array();
		$links = array();
		foreach ($documents as $document) {
			if (!isset($links[$document['location']])) {
				$menu[] = $document;
				$links[$document['id']] = count($menu) - 1;
			} else {
				for ($i = $links[$document['location']] + 1; $menu[$i]['location'] == $document['location']; $i++) {}
				
				array_splice($menu, $i, 0, $document);
			}
		}*/
		/*
		return $this->_flattenMenu($this->generateMenu($documents));;
	}*/
	
	public function get($id)
	{
		$document = $this->_db->getRow($this->_tableName, '*', 'id', $id);
		
		if (is_null($document)) {
			die('Document does not exist');
		}
		
		return $document;
	}
	
	public function getAll($cols = '*', $filterParentId = 0, $onlyVisible = false)
	{
		$tableName = $this->_tableName;
		
		$whereArray = array();
		if (!empty($filterParentId)) {
			$whereArray[] = "parent_id = " . $this->_db->quote($filterParentId);
		}
		if ($onlyVisible) {
			$whereArray[] = 'is_visible = 1';
		}
		
		$where = !empty($whereArray) ? 'WHERE' : '';
		
		$sql_query = "SELECT $cols FROM $tableName $where " . implode(' AND ', $whereArray) . " ORDER BY id ASC";
		return $this->_db->getRows($sql_query);
	}
	
	public function getByLink($link)
	{
		return $this->_db->getRow($this->_tableName, '*', 'link', $link);
	}
	
	public function getIncludeKeys($body, $keys)
	{
		$includeKeys = array();
		
		foreach ($keys as $key) {
			$includeKeys[$key] = array();
			preg_match_all("/%($key)(\(([a-z0-9]+)='([^']*)'(,\s*([a-z0-9]+)='([^']*)')*\))?%/", $body, $matches);
			
			foreach ($matches[1] as $index => $keyName) {
				$parameters = array();
				for ($i = 3; !empty($matches[$i][$index]); $i += 3) {
					$parameters[$matches[$i][$index]] = html_entity_decode($matches[$i + 1][$index], ENT_COMPAT, 'utf-8');
				}
				
				$includeKeys[$key][] = array(
					'includeString' => $matches[0][$index],
					'name' => $keyName,
					'parameters' => $parameters
				);
			}
		}
		
		return $includeKeys;
	}
	
	public function remove($id)
	{
		$this->_db->delete($this->_tableName, 'id = '.$this->_db->quote($id));
	}
	
	/*private function _flattenMenu($menu, $level = 0)
	{
		$flatMenu = array();
		foreach ($menu as $item) {
			$flatChildren = array();
			// Get children
			if (!empty($item['children'])) {
				$flatChildren = $this->_flattenMenu($item['children'], $level + 1);
			}
			
			// Set level
			$item['level'] = $level;
			// Remove children, because we are flattening
			unset($item['children']);
			// Add item
			$flatMenu[] = $item;
			// Add children
			array_splice($flatMenu, count($flatMenu), 0, $flatChildren);
		}
		
		return $flatMenu;
	}*/
	
	private function _makeLink($text)
	{
		$linkUnique = $link = $this->_linkify($text);
		
		$i = 1;
		while (!is_null($this->getByLink($linkUnique))) {
			$linkUnique = $link . '-' . $i++;
		}
		
		return $linkUnique;
	}
	
	private function _linkify($filename, $additionalCharacters = '')
	{
		if (mb_detect_encoding($filename, 'UTF-8, ISO-8859-1') == 'UTF-8') {
			$filename = utf8_decode($filename);
		}
		if (mb_detect_encoding($additionalCharacters, 'UTF-8, ISO-8859-1') == 'UTF-8') {
			$additionalCharacters = utf8_decode($additionalCharacters);
		}
		
		return utf8_encode(preg_replace("/[^a-z0-9{$additionalCharacters}_.!~*')(-]/", '',
			preg_replace('/\s+/', '-',
				strtolower($filename)
			)
		));
	}
}