<?php defined('BLUDIT') or die('Bludit CMS.');

class dbPages extends dbJSON
{
	private $parentKeyList = array();

	private $dbFields = array(
		'title'=>		array('inFile'=>true,	'value'=>''),
		'content'=>		array('inFile'=>true,	'value'=>''),
		'description'=>		array('inFile'=>false,	'value'=>''),
		'username'=>		array('inFile'=>false,	'value'=>''),
		'tags'=>		array('inFile'=>false,	'value'=>array()),
		'status'=>		array('inFile'=>false,	'value'=>'draft'), // published, draft, scheduled
		'date'=>		array('inFile'=>false,	'value'=>''),
		'dateModified'=>	array('inFile'=>false,	'value'=>''),
		'position'=>		array('inFile'=>false,	'value'=>0),
		'coverImage'=>		array('inFile'=>false,	'value'=>''),
		'category'=>		array('inFile'=>false,	'value'=>''),
		'md5file'=>		array('inFile'=>false,	'value'=>''),
		'uuid'=>		array('inFile'=>false,	'value'=>''),
		'allowComments'=>	array('inFile'=>false,	'value'=>false)
	);

	function __construct()
	{
		parent::__construct(DB_PAGES);
	}

	// Create a new page
	public function add($args)
	{
		$dataForDb = array();	// This data will be saved in the database
		$dataForFile = array(); // This data will be saved in the file

		// The user is always the one loggued
		$args['username'] = Session::get('username');
		if( Text::isEmpty($args['username']) ) {
			return false;
		}

		// Generate key
		$key = $this->generateKey($args['slug'], $args['parent']);

		// Generate UUID
		$args['uuid'] = md5( uniqid() );

		// Get current date
		$args['date'] = Date::current(DB_DATE_FORMAT);

		foreach($this->dbFields as $field=>$options) {
			if( isset($args[$field]) ) {
				if($field=='tags') {
					$value = $this->generateTags($args['tags']);
				}
				else {
					if( !$options['inFile'] ) {
						// Sanitize if will be stored on database
						$value = Sanitize::html($args[$field]);
					}
					else {
						$value = $args[$field];
					}
				}
			}
			else {
				// Default value for the field
				$value = $options['value'];
			}

			// Where the data is stored
			if($options['inFile']) {
				$dataForFile[$field] = Text::firstCharUp($field).': '.$value;
			}
			else {
				// Set type
				settype($value, gettype($options['value']));

				// Save on database
				$dataForDb[$field] = $value;
			}
		}

		// Create the directory
		if( Filesystem::mkdir(PATH_PAGES.$key, true) === false ) {
			Log::set(__METHOD__.LOG_SEP.'Error occurred when trying to create the directory '.PATH_PAGES.$key);
			return false;
		}

		// Make the index.txt and save the file.
		$data = implode("\n", $dataForFile);
		if( file_put_contents(PATH_PAGES.$key.DS.FILENAME, $data) === false ) {
			Log::set(__METHOD__.LOG_SEP.'Error occurred when trying to put the content in the file '.FILENAME);
			return false;
		}

		// Save the database
		$this->db[$key] = $dataForDb;
		if( $this->save() === false ) {
			Log::set(__METHOD__.LOG_SEP.'Error occurred when trying to save the database file.');
			return false;
		}

		return $key;
	}

	public function edit($args)
	{
		$dataForDb = array();
		$dataForFile = array();

		// The user is always the one loggued
		$args['username'] = Session::get('username');
		if( Text::isEmpty($args['username']) ) {
			return false;
		}

		$newKey = $this->generateKey($args['slug'], $args['parent'], false, $args['key']);

		// If the page is draft then the time created is now
		if( $this->db[$args['key']]['status']=='draft' ) {
			$args['date'] = Date::current(DB_DATE_FORMAT);
		}
		else {
			$args['date'] = $this->db[$args['key']]['date'];
		}

		// Current UUID
		$args['uuid'] = $this->db[$args['key']]['uuid'];

		// Modified date
		$args['dateModified'] = Date::current(DB_DATE_FORMAT);

		foreach($this->dbFields as $field=>$options) {
			if( isset($args[$field]) ) {
				if($field=='tags') {
					$value = $this->generateTags($args['tags']);
				}
				else {
					if( !$options['inFile'] ) {
						// Sanitize if will be stored on database
						$value = Sanitize::html($args[$field]);
					}
					else {
						// Default value for the field
						$value = $args[$field];
					}
				}
			}
			else {
				$value = $options['value'];
			}

			// Where the data is stored
			if($options['inFile']) {
				$dataForFile[$field] = Text::firstCharUp($field).': '.$value;
			}
			else {
				// Set type
				settype($value, gettype($options['value']));

				// Save on database
				$dataForDb[$field] = $value;
			}
		}

		// Move the directory from old key to new key.
		if($newKey!==$args['key']) {
			if( Filesystem::mv(PATH_PAGES.$args['key'], PATH_PAGES.$newKey) === false ) {
				Log::set(__METHOD__.LOG_SEP.'Error occurred when trying to move the directory to '.PATH_PAGES.$newKey);
				return false;
			}
		}

		// Make the index.txt and save the file.
		$data = implode("\n", $dataForFile);
		if( file_put_contents(PATH_PAGES.$newKey.DS.FILENAME, $data) === false ) {
			Log::set(__METHOD__.LOG_SEP.'Error occurred when trying to put the content in the file '.FILENAME);
			return false;
		}

		// Remove the old key
		unset( $this->db[$args['key']] );

		// Save the database
		$this->db[$newKey] = $dataForDb;
		if( $this->save() === false ) {
			Log::set(__METHOD__.LOG_SEP.'Error occurred when trying to save the database file.');
			return false;
		}

		return $newKey;
	}

	public function delete($key)
	{
		// Page doesn't exist in database
		if(!$this->pageExists($key)) {
			Log::set(__METHOD__.LOG_SEP.'The page does not exist. Key: '.$key);
		}

		// Delete the index.txt file
		if( Filesystem::rmfile(PATH_PAGES.$key.DS.FILENAME) === false ) {
			Log::set(__METHOD__.LOG_SEP.'Error occurred when trying to delete the file '.FILENAME);
		}

		// Delete the directory
		if( Filesystem::rmdir(PATH_PAGES.$key) === false ) {
			Log::set(__METHOD__.LOG_SEP.'Error occurred when trying to delete the directory '.PATH_PAGES.$key);
		}

		// Remove from database
		unset($this->db[$key]);

		// Save the database.
		if( $this->save() === false ) {
			Log::set(__METHOD__.LOG_SEP.'Error occurred when trying to save the database file.');
		}

		return true;
	}

	// Return an array with the database for a page, FALSE otherwise.
	public function getPageDB($key)
	{
		if( $this->pageExists($key) ) {
			return $this->db[$key];
		}

		return false;
	}

	// Set a field of the database
	public function setField($key, $field, $value)
	{
		if( $this->pageExists($key) ) {
			settype($value, gettype($this->dbFields[$key]['value']));
			$this->db[$key][$field] = $value;
		}

		return false;
	}

	// Return TRUE if the page exists, FALSE otherwise.
	public function pageExists($key)
	{
		return isset($this->db[$key]);
	}

	public function parentKeyList()
	{
		return $this->parentKeyList;
	}

	public function parentKeyExists($key)
	{
		return isset( $this->parentKeyList[$key] );
	}

	public function addParentKey($key)
	{
		$this->parentKeyList[$key] = $key;
	}

	// Generate a valid Key/Slug.
	public function generateKey($text, $parent=NO_PARENT_CHAR, $returnSlug=false, $oldKey='')
	{
		if(Text::isEmpty($text)) {
			$text = 'empty';
		}

		if( Text::isEmpty($parent) || ($parent==NO_PARENT_CHAR) ) {
			$newKey = Text::cleanUrl($text);
		}
		else {
			$newKey = Text::cleanUrl($parent).'/'.Text::cleanUrl($text);
		}

		if($newKey!==$oldKey)
		{
			// Verify if the key is already been used.
			if( isset($this->db[$newKey]) )
			{
				if( !Text::endsWithNumeric($newKey) ) {
					$newKey = $newKey.'-0';
				}

				while( isset($this->db[$newKey]) ) {
					$newKey++;
				}
			}
		}

		if($returnSlug)
		{
			$explode = explode('/', $newKey);

			if(isset($explode[1])) {
				return $explode[1];
			}

			return $explode[0];
		}

		return $newKey;
	}

	// Returns the database
	public function getDB()
	{
		return $this->db;
	}

	// Returns an Array, array('tagSlug'=>'tagName')
	// (string) $tags, tag list separeted by comma.
	public function generateTags($tags)
	{
		$tmp = array();

		$tags = trim($tags);

		if(empty($tags)) {
			return $tmp;
		}

		// Make array
		$tags = explode(',', $tags);

		foreach($tags as $tag)
		{
			$tag = trim($tag);
			$tagKey = Text::cleanUrl($tag);
			$tmp[$tagKey] = $tag;
		}

		return $tmp;
	}

	// Change all posts with the old category key for the new category key
	public function changeCategory($oldCategoryKey, $newCategoryKey)
	{
		foreach($this->db as $key=>$value) {
			if($value['category']==$oldCategoryKey) {
				$this->db[$key]['category'] = $newCategoryKey;
			}
		}

		// Save database
		return $this->save();
	}

	public function count()
	{
		$count = parent::count();

		// DEBUG: Less than - 1 because the error page.
		return $count - 1;
	}

	public function cliMode()
	{
		// LOG
		Log::set('CLI MODE - PAGES - Starting...');

		$pageList = array();

		$pagesDirectories = Filesystem::listDirectories(PATH_PAGES);
		foreach( $pagesDirectories as $directory ) {

			if( Sanitize::pathFile($directory.DS.FILENAME) ) {

				// The key is the directory name
				$key = basename($directory);

				// Add the page key to the list
				$pageList[$key] = true;

				// LOG
				Log::set('CLI MODE - Page found, key: '.$key);

				// Search sub-pages
				$subPaths = Filesystem::listDirectories($directory.DS);
				foreach( $subPaths as $subDirectory )
				{
					// The key of the sub-page
					$subKey = basename($subDirectory);

					if( Sanitize::pathFile($subDirectory.DS.FILENAME) ) {

						// Add the key of the sub-page, the key is composed by the directory/subdirectory
						$pageList[$key.'/'.$subKey] = true;

						// LOG
						Log::set('CLI MODE - Page found, key: '.$key);
					}
				}
			}
		}

		foreach( $pageList as $key=>$value ) {

			if( !isset($this->db[$key]) ) {

				// LOG
				Log::set('CLI MODE - The page is not in the database, key: '.$key);

				// Insert new post
				$this->cliModeInsert($key);
			}
			else {
				$checksum = md5_file(PATH_PAGES.$key.DS.FILENAME);

				// If checksum is different, update the post
				if( !isset($this->db[$key]['md5file']) ||
					$this->db[$key]['md5file']!==$checksum ) {

					// LOG
					Log::set('CLI MODE - Different md5 checksum, key: '.$key);

					// Update the post
					$this->cliModeInsert($key, $update=true);
				}
			}
		}

		// LOG
		Log::set('CLI MODE - Cleaning database...');

		foreach( array_diff_key($this->db, $pageList) as $key=>$data ) {

			// LOG
			Log::set('CLI MODE - Removing page from database, key: '.$key);

			// Remove the page from database
			unset( $this->db[$key] );
		}

		// Save the database
		$this->save();

		// LOG
		Log::set('CLI MODE - PAGES - Finishing...');

		return true;
	}

	private function cliModeInsert($key, $update=false)
	{
		if($update) {
			// LOG
			Log::set('CLI MODE - cliModeInsert() - Updating the page, key: '.$key);

			// Database from the current database
			$dataForDb = $this->db[$key];
			$dataForDb['dateModified'] = Date::current(DB_DATE_FORMAT);
		}
		else {
			// LOG
			Log::set('CLI MODE - cliModeInsert() - Inserting the new post, key: '.$key);

			// Database for the new page, fields with the default values
			$dataForDb = array();
			foreach( $this->dbFields as $field=>$options ) {

				if( !$options['inFile'] ) {
					$dataForDb[$field] = $options['value'];
				}
			}

			// Fields and value predefined in init.php
			$dataForDb['username']	= CLI_USERNAME;
			$dataForDb['status'] 	= CLI_STATUS;
			$dataForDb['date'] 	= Date::current(DB_DATE_FORMAT);
		}

		// MD5 checksum
		$dataForDb['md5file'] = md5_file(PATH_PAGES.$key.DS.FILENAME);

		// Generate the Object from the file
		$Page = new Page($key);

		foreach( $this->dbFields as $field=>$options ) {

			if( !$options['inFile'] ) {

				// Get the field from the file
				// If the field doesn't exist, the function returns FALSE
				$data = $Page->getField($field);

				if( $data!==false ) {

					$tmpValue = '';

					if( $field=='tags' ) {
						$tmpValue = $this->generateTags($data);
					}
					elseif( $field=='date' ) {

						// Validate format date from file
						if( Valid::date($data, DB_DATE_FORMAT) ) {

							$tmpValue = $data;
						}
					}
					else {
						$tmpValue = Sanitize::html($data);
					}

					settype($tmpValue, gettype($options['value']));
					$dataForDb[$field] = $tmpValue;
				}
			}
		}

		// Insert row in the database
		$this->db[$key] = $dataForDb;

		return true;
	}

	public function regenerateCli()
	{
		$db = $this->db;
		$newPaths = array();
		$fields = array();

		// Default fields and value
		foreach($this->dbFields as $field=>$options) {
			if(!$options['inFile']) {
				$fields[$field] = $options['value'];
			}
		}

		//$tmpPaths = glob(PATH_PAGES.'*', GLOB_ONLYDIR);
		$tmpPaths = Filesystem::listDirectories(PATH_PAGES);
		foreach($tmpPaths as $directory)
		{
			$key = basename($directory);

			if(file_exists($directory.DS.FILENAME)) {
				// The key is the directory name
				$newPaths[$key] = true;
			}

			// Recovery pages from subdirectories
			//$subPaths = glob($directory.DS.'*', GLOB_ONLYDIR);
			$subPaths = Filesystem::listDirectories($directory.DS);
			foreach($subPaths as $subDirectory)
			{
				$subKey = basename($subDirectory);

				if(file_exists($subDirectory.DS.FILENAME)) {
					// The key is composed by the directory/subdirectory
					$newPaths[$key.'/'.$subKey] = true;
				}
			}
		}

		foreach($newPaths as $key=>$value)
		{
			if(!isset($this->db[$key]))
			{
				// Default values for the new pages.
				$fields['status'] = CLI_STATUS;
				$fields['date'] = Date::current(DB_DATE_FORMAT);
				$fields['username'] = 'admin';

				// Create the entry for the new page.
				$this->db[$key] = $fields;
			}

			$Page = new Page($key);

			// Update all fields from FILE to DATABASE.
			foreach($fields as $f=>$v)
			{
				// If the field exists on the FILE, update it.
				if($Page->getField($f))
				{
					$valueFromFile = $Page->getField($f);

					if($f=='tags') {
						// Generate tags array.
						$this->db[$key]['tags'] = $this->generateTags($valueFromFile);
					}
					elseif($f=='date') {
						// Validate Date from file
						if(Valid::date($valueFromFile, DB_DATE_FORMAT)) {
							$this->db[$key]['date'] = $valueFromFile;
						}
					}
					else {
						// Sanitize the values from file.
						$this->db[$key][$f] = Sanitize::html($valueFromFile);
					}
				}
			}
		}

		// Remove old pages from db
		foreach( array_diff_key($db, $newPaths) as $key=>$data ) {
			unset($this->db[$key]);
		}

		// Save the database.
		if( $this->save() === false ) {
			Log::set(__METHOD__.LOG_SEP.'Error occurred when trying to save the database file.');
			return false;
		}

		return $this->db!=$db;
	}
}