<?
require_once('path.inc.php');

class PathAPI extends WebAPI {
	private $isAdmin = false;
	private $validIdPrefix = array(
						// array( getIDFunction, GetDBObjectFunc, CheckPermission, HasItemFunc, Formula)
		'defaultsmart' => array('GetId', null, null, null, null),
		'smart' => array('GetName', 'SmartAlbum::GetByNames', null, 'SmartHasItem', 'Decorator::SmartFormula'),
		'tag' => array('GetId', 'Label::GetByIds', null, 'TagHasItem', 'Decorator::TagFormula'),
		'album' => array('GetName', 'Album::GetBySharename', 'AlbumAccessible', 'AlbumHasItem', 'Decorator::AlbumFormula'),
		'category' => array('GetId', 'Category::GetByIds', 'CategoryAccessible', 'CategoryHasItem', 'Decorator::CategoryFormula'),
		'photo' => array('GetItemName', 'File::GetPhotoByDBPath', 'ItemAccessible', 'HasNoItem', 'Decorator::PhotoFormula'),
		'video' => array('GetItemName', 'File::GetVideoByDBPath', 'ItemAccessible', 'HasNoItem', 'Decorator::VideoFormula')
	);

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

	protected function Process()
	{
		if (!strcasecmp($this->method, "getpath")) {
			$this->GetPath();
		} else if (!strcasecmp($this->method, "checkpath")) {
			$this->CheckPath();
		}
	}

	private function GetPath()
	{
		$param = $this->GetParam_GetPath();
		$items = array();
		if (!$param) {
			$this->SetError(WEBAPI_ERR_BAD_REQUEST);
			goto End;
		}
		$items[] = AlbumAPIUtil::GetRootAlbumInfo($param);
		if (0 !== count($param['sharepath'])) {
			$result = Album::GetBySharename($param['sharepath']);

			$allowComment = AlbumAPIUtil::IsAlbumCommentalbGlobal();
			$showAlbumHit = AlbumAPIUtil::IsShowAlbumHit();
			$needThumbSize = in_array('thumb_size', $param['additional']);

			foreach ($param['sharepath'] as $sharepath) {
				$item = array();

				$item = Decorator::AlbumFormula($result[$sharepath], array(
					'allowComment' => $allowComment,
					'showAlbumHit' => $showAlbumHit,
					'param'		   => $param,
					'needThumbSize' => $needThumbSize
				));

				$items[] = $item;
			}
		}

		$resp = array(
			'items' => $items,
			'total' => count($items)
		);
		$this->SetResponse($resp);
	End:
		return;
	}

	private function GetParam_GetPath()
	{
		if (!isset($_REQUEST['id'])){
			return false;
		}
		if (preg_match('/^(photo|video)_/', $_REQUEST['id'])) {
			$ids = explode("_", $_REQUEST['id']);
			$path = @pack("H*", $ids[1]) .'/'. @pack("H*", $ids[2]);
		} else {
			$path = $this->DecodeItemId($_REQUEST['id'], '_');
		}

		if (false === $path) {
			return false;
		}
		$dir = pathinfo($path, PATHINFO_DIRNAME);;
		$dirs = array();
		while (!in_array($dir, array('.', '', '/'), true)) {
			$dirs[] = $dir;
			$dir = pathinfo($dir, PATHINFO_DIRNAME);
		}
		$param = array(
			'additional' => explode(',', $_REQUEST['additional']),
			'sharepath' => array_reverse($dirs),
			'ignore' => explode(',', $_REQUEST['ignore'])
		);

		return $param;
	}

	private function CheckPath()
	{
		$param = $this->GetParam_CheckPath();
		if (!$param) {
			$this->SetError(WEBAPI_ERR_BAD_REQUEST);
			goto End;
		}

		$allowComment = AlbumAPIUtil::IsAlbumCommentalbGlobal();
		$showAlbumHit = AlbumAPIUtil::IsShowAlbumHit();
		$needThumbSize = in_array('thumb_size', $param['additional']);

		$previous = false;
		$items = array();
		$formedItem = array();
		$last_token = end($param['validToken']);

		foreach ($param['validToken'] as $token => $value) {
			$type = $value['type'];
			$id = $value['id'];
			list($idProcessFunc, $GetObjFunc, $permissionFunc, $hasItemFunc, $formula) = $this->validIdPrefix[$type];
			if (!$GetObjFunc) {
				continue;
			}
			$id = $this->$idProcessFunc($id);
			if (in_array($type, array('photo', 'video'))) {
				$objs = call_user_func($GetObjFunc, array($id['dbPath']));
				$item = $objs[$id['dbPath']];
			} else {
				$objs = call_user_func($GetObjFunc, array($id));
				$item = $objs[$id];
			}

			if (!$item) {
				$this->SetError(array(PHOTOSTATION_PATH_ACCESS_DENY));
				goto End;
			}

			$items[$token] = array(
				'id' => $token,
				'type' => $type,
				'info' => $item
			);

			// check current permission
			if ($permissionFunc) {
				$code = $this->$permissionFunc($item);
				if ($type === 'album') {
					if ($code === WEBAPI_ERR_NONE && !$previousCode) {
						$previousToken = $previousCode = null;
					} else if ($last_token != $value && in_array($code, array(PHOTOSTATION_ALBUM_NO_ACCESS_RIGHT, PHOTOSTATION_ALBUM_PASSWORD_ERROR)) && !$previousCode) {
						$previousCode = $code;
						$previousToken = $token;

					// password -> public / private
					} else if ($code === PHOTOSTATION_ALBUM_NO_ACCESS_RIGHT && $previousCode === PHOTOSTATION_ALBUM_PASSWORD_ERROR) {
						// password -> public
						if ($item['public']) {
							$this->SetError(array($previousCode, $previousToken));
							goto End;

						// password -> private
						} else {
							$this->SetError(array($code, $token));
							goto End;
						}

					// private/password -> password (error)
					} else if ($code === PHOTOSTATION_ALBUM_PASSWORD_ERROR &&
						in_array($previousCode, array(PHOTOSTATION_ALBUM_NO_ACCESS_RIGHT, PHOTOSTATION_ALBUM_PASSWORD_ERROR))) {
						$this->SetError(array($code, $token));
						goto End;

					// private/password -> password (passed)
					} else if ($code == WEBAPI_ERR_NONE && $previousCode && $item['password']) {
						$previousCode = $previousToken = null;

					// private -> public
					} else if ($code == WEBAPI_ERR_NONE && $previousCode && $this->NotPasswordAlbum($item)) {
						$this->SetError(array($previousCode, $previousToken));
						goto End;
					} else if ($code !== WEBAPI_ERR_NONE) {
						$this->SetError(array($code, $token));
						goto End;
					}
				} else {
					if ($previousCode) {
						$this->SetError(array($previousCode, $previousToken));
						goto End;
					}
					if ($code !== WEBAPI_ERR_NONE) {
						$this->SetError(array($code, $token));
						goto End;
					}
				}
			}
			
			// check previous and current valid
			if ($previous) {
				$parentObj = $items[$previous];
				$parentFunc = $this->validIdPrefix[$parentObj['type']];

				// check previous has current
				$hasItemFunc = $parentFunc[3];
				if ($hasItemFunc && !$this->$hasItemFunc($parentObj['info'], $type, $id, $item)) {
					$this->SetError(array(PHOTOSTATION_PATH_ACCESS_DENY));
					goto End;
				}
			}
			if ($formula) {
				$formedItem[$token] = call_user_func($formula, $item, array(
						'allowComment' => $allowComment,
						'showAlbumHit' => $showAlbumHit,
						'param'		   => $param,
						'id'		   => $token,
						'needThumbSize' => $needThumbSize
					)
				);
			} else {
				$formedItem[$token] = $items[$token];
			}
			$previous = $token;
		}

		$result = array();
		foreach ($param['tokens'] as $token) {
			if ($formedItem[$token]) {
				$result[] = $formedItem[$token];
			} else {
				$result[] = array(
					"id" => $token
				);
			}
		}
        $resp['total'] = count($result);
		$resp['items'] = $result;
        $this->SetResponse($resp);
	End:
		return;
	}
	private function ItemAccessible($obj)
	{
		$relativePath = substr($obj['path'], strlen(SYNOPHOTO_SERVICE_REAL_DIR_PATH));
		$dirname = pathinfo($relativePath, PATHINFO_DIRNAME);
		$sharename = '.' === $dirname ? '/' : $dirname;
		$accessible = csSYNOPhotoMisc::CheckAlbumAccessible($sharename);
		return $accessible ? WEBAPI_ERR_NONE : PHOTOSTATION_PHOTO_ACCESS_DENY;
	}

	private function AlbumAccessible($obj)
	{
		$sharename = $obj['sharename'];
		$accessible = csSYNOPhotoMisc::CheckAlbumAccessible($sharename);
		if ($obj['password'] && !$accessible) {
			return PHOTOSTATION_ALBUM_PASSWORD_ERROR;
		} else if (!$accessible) {
			return PHOTOSTATION_ALBUM_NO_ACCESS_RIGHT;
		}
		return WEBAPI_ERR_NONE;
	}

	private function CategoryAccessible($obj)
	{
		if ($obj['hidden'] && !$this->isAdmin) {
			return PHOTOSTATION_CATEGORY_ACCESS_DENY;
		}
		return WEBAPI_ERR_NONE;
	}

	private function SmartHasItem($parentObj, $itemType, $itemId, $itemObj)
	{
		$itemlist = SmartAlbum::GetSmartAlbumInstance()->GetItemsInSmartAlbum($parentObj, "filename", "asc", 0, -1);
		foreach ($itemlist as $item) {
			if ($item['id'] === $itemObj['id']) {
				return true;
			}
		}
		return false;
	}

	private function TagHasItem($parentObj, $itemType, $itemId, $itemObj)
	{
		if ('photo' === $itemType) {
			$item = ItemLabel::GetByItemKeyLabelId($itemObj['id'], $parentObj['id'], true);
		} else if ('video' === $itemType) {
			$item = ItemLabel::GetByItemKeyLabelId($itemObj['path'], $parentObj['id'], false);
		} else {
			return false;
		}

		return $item ? true : false;
	}

	private function AlbumHasItem($parentObj, $itemType, $itemId, $itemObj)
	{
		if (in_array($itemType, array('photo', 'video'))) {
			return $itemObj['shareid'] === $parentObj['shareid'];
		}
		return Album::HasItem($parentObj['sharename'], $itemObj['sharename']);
	}

	private function CategoryHasItem($parentObj, $itemType, $itemId, $itemObj)
	{
		if ('album' === $itemType) {
			return Category::HasItem($parentObj['id'], $itemType, $itemObj['shareid']);
		}
		return Category::HasItem($parentObj['id'], $itemType, $itemId);
	}

	private function HasNoItem($parentObj, $itemType, $itemId, $itemObj)
	{
		return false;
	}

	private function GetParam_CheckPath()
	{
		$param = array();

		if(!isset($_REQUEST['token'])) {
			return false;
		}

		$tokens = split('/', $_REQUEST['token']);

		$validTokens = array();
		foreach($tokens as $token) {
			$token = trim($token);
			if (!$token) {
				continue;
			}

			$parts = explode('_', $token, 2);
			if (2 > count($parts) || !array_key_exists($parts[0], $this->validIdPrefix)) {
				continue;
			}
			$validTokens[$token] = array(
				'type' => $parts[0],
				'id' => $parts[1]
			);
		}

		$param = array(
			'tokens' => $tokens,
			'validToken' => $validTokens,
			'ignore' => explode(',', $_REQUEST['ignore']),
			'additional' => explode(',', $_REQUEST['additional'])
		);

		return $param;
	}


	private function GetId ($id) {
		return $id;
	}

	private function GetName ($id) {
		return @pack('H*', $id);
	}

	private function GetItemName ($id) {
		$parts = split('_', $id);
		$sharename = $this->GetName($parts[0]);
		$filename = $this->GetName($parts[1]);
		return array(
			'sharename' => $sharename,
			'filename'	=> $filename,
			'dbPath' => SYNOPHOTO_SERVICE_REAL_DIR_PATH. ('/' === $sharename ? '': "$sharename/"). $filename
		);
	}

	private function NotPasswordAlbum ($item) {
		return !$item['password'];
	}

	protected function CheckPermission()
	{
		$this->isAdmin = isset($_SESSION[SYNOPHOTO_ADMIN_USER]['admin_syno_user']);
		return true;
	}
}

$api = new PathAPI();
$api->Run();