<?php /** @file */

use Sabre\DAV;
require_once('vendor/autoload.php');

class RedInode implements DAV\INode {

	private $attach;

	function __construct($attach) {
		$this->attach = $attach;
	}


	function delete() {
		if(! perm_is_allowed($this->channel_id,'','view_storage'))
			return;

		/**
		 * Since I don't believe this is documented elsewhere -
		 * ATTACH_FLAG_OS means that the file contents are stored in the OS
		 * rather than in the DB - as is the case for attachments.
		 * Exactly how they are stored (what path and filename) are still
		 * TBD. We will probably not be using the original filename but 
		 * instead the attachment 'hash' as this will prevent folks from 
		 * uploading PHP code onto misconfigured servers and executing it.
		 * It's easy to misconfigure servers because we can provide a 
		 * rule for Apache, but folks using nginx will then be susceptible.
		 * Then there are those who don't understand these kinds of exploits
		 * and don't have any idea allowing uploaded PHP files to be executed
		 * by the server could be a problem. We also don't have any idea what
		 * executable types are served on their system - like .py, .pyc, .pl, .sh
		 * .cgi, .exe, .bat, .net, whatever.  
		 */

		if($this->attach['flags'] & ATTACH_FLAG_OS) {
			// FIXME delete physical file
		}
		if($this->attach['flags'] & ATTACH_FLAG_DIR) {
			// FIXME delete contents (recursive?)
		}
		
		q("delete from attach where id = %d limit 1",
			intval($this->attach['id'])
		);

	}

	function getName() {
		return $this->attach['filename'];
	}

	function setName($newName) {

		if((! $newName) || (! perm_is_allowed($this->channel_id,'','view_storage')))
			return;

		$this->attach['filename'] = $newName;
		$r = q("update attach set filename = '%s' where id = %d limit 1",
			dbesc($this->attach['filename']),
			intval($this->attach['id'])
		);

	}

	function getLastModified() {
		return $this->attach['edited'];
	}

}


class RedDirectory extends DAV\Node implements DAV\ICollection {

	private $red_path;
	private $root_dir = '';
	private $dir_key;
	private $auth;
	private $channel_id;


	function __construct($red_path,&$auth_plugin) {
		logger('RedDirectory::__construct()');
		$this->red_path = $red_path;
		$this->auth = $auth_plugin;
		logger('RedDirectory: ' . print_r($this->auth,true));

	}

	function getChildren() {

		logger('RedDirectory::getChildren : ' . print_r($this->auth,true));

		if(! perm_is_allowed($this->auth->channel_id,$this->auth->observer,'view_storage'))
			return array();

		if($this->red_path === '/' . $this->auth->channel_name) {

			return new RedFile('/' . $this->auth->channel_name . '/' . 'test',$this->auth);

		}


		$ret = array();
		$r = q("select distinct filename from attach where folder = '%s' and uid = %d group by filename",
			dbesc($this->dir_key),
			intval($this->channel_id)
		);
		if($r) {
			foreach($r as $rr) {
				$ret[] = $rr['filename'];
			}
		}
		return $ret;

	}


	function getChild($name) {


		logger('RedDirectory::getChild : ' . $name);
		logger('RedDirectory::getChild red_path : ' . $this->red_path);

		logger('RedDirectory::getChild : ' . print_r($this->auth,true));


		if(! perm_is_allowed($this->auth->channel_id,$this->auth->observer,'view_storage')) {
			throw new DAV\Exception\Forbidden('Permission denied.');
			return;
		}


		// These should be constants

		if($this->red_path == 'store' && $name == 'cloud') {
			return new RedDirectory('/' . $this->auth->channel_name,$this->auth);
		}
		
		if($this->red_path === '/' . $this->auth->channel_name) {

			return new RedFile('/' . $this->auth->channel_name . '/' . 'test',$this->auth);

		}

		// FIXME check file revisions


		$r = q("select * from attach where folder = '%s' and filename = '%s' and uid = %d limit 1",
			dbesc($this->dir_key),
			dbesc($name),
			dbesc($this->auth->channel_id)
		);
		if(! $r) {
			throw new DAV\Exception\NotFound('The file with name: ' . $name . ' could not be found');
      	}

		
	}

	function getName() {
		logger('RedDirectory::getName : ' . print_r($this->auth,true));


	}


	function createFile($name,$data = null) {


	}

	function createDirectory($name) {


	}


	function childExists($name) {

		logger('RedDirectory::childExists : ' . print_r($this->auth,true));

		$r = q("select distinct filename from attach where folder = '%s' and filename = '%s' and uid = %d group by filename",
			dbesc($this->dir_key),
			dbesc($name),
			intval($this->auth->channel_id)
		);
		if($r)
			return true;
		return false;

	}

}


class RedFile extends DAV\Node implements DAV\IFile {

	private $data;
	private $auth;
	private $name;

	function __construct($name, &$auth) {
		logger('RedFile::_construct: ' . $name);
		$this->name = $name;
		$this->auth = $auth;
		$this->data = RedFileData($name,$auth);

		logger('RedFile::_construct: ' . print_r($this->data,true));
	}


	function getName() {
		logger('RedFile::getName');
		return basename($data);

	}

	function put($data) {

	}


	function get() {


	}

	function getETag() {


	}


	function getContentType() {
		$type = 'text/plain';
		return $type;

//		return $this->data['filetype'];
	}


	function getSize() {
		return 33122;
//		return $this->data['filesize'];
	}

}


function RedFileData($file, $auth) {


	if(substr($file,0,1) !== '/')
		return null;
	$path_arr = explode('/',$file);
	if(! $path_arr)
		return null;

	$channel_name = $path_arr[0];

	$folder = '';

	for($x = 1; $x < count($path_arr); $x ++) {
		
		$r = q("select distinct filename from attach where folder = '%s' and filename = '%s' and uid = %d group by filename",
			dbesc($folder),
			dbesc($path_arr[$x]),
			intval($this->auth->channel_id)
		);

		if($r && ( $r[0]['flags'] && ATTACH_FLAG_DIR)) {
			$folder = $r[0]['filename'];
		}
	}

	return $r[0];

}