<?php
/**
 * Copyright 2013-2014 Horde LLC (http://www.horde.org/)
 *
 * See the enclosed file LICENSE for license information (BSD). If you
 * did not receive this file, see http://www.horde.org/licenses/bsd.
 *
 * @author   Jan Schneider <jan@horde.org>
 * @category Horde
 * @license  http://www.horde.org/licenses/bsd BSD
 * @package  Dav
 */

use \Sabre\DAV;

/**
 * A file object.
 *
 * @author   Jan Schneider <jan@horde.org>
 * @category Horde
 * @license  http://www.horde.org/licenses/bsd BSD
 * @package  Dav
 */
class Horde_Dav_File extends Sabre\DAV\File implements DAV\IProperties
{
    /**
     * A registry object.
     *
     * @var Horde_Registry
     */
    protected $_registry;

    /**
     * The path to the current file.
     *
     * @var string
     */
    protected $_path;

    /**
     * File details.
     *
     * @var array
     */
    protected $_item;

    /**
     * File size.
     *
     * This will only be set if the actual file data is requested, to avoid the
     * overhead of building the file content only to retrieve the file size.
     *
     * @var integer
     */
    protected $_size;

    /**
     * Mapping of WebDAV property names to Horde API's browse() properties.
     *
     * @var array
     */
    protected static $_propertyMap = array(
        '{DAV:}getcontentlength'            => 'contentlength',
        '{DAV:}getcontenttype'              => 'contentype',
        '{DAV:}getetag'                     => 'etag',
        '{DAV:}owner'                       => 'owner',
        '{http://sabredav.org/ns}read-only' => 'read-only',
    );

    /**
     * Constructor.
     *
     * @param Horde_Registry $registry  A registry object.
     * @param string $path              The path to this file.
     * @param array $item               File details.
     */
    public function __construct(Horde_Registry $registry, $path = null,
                                array $item = array())
    {
        $this->_registry = $registry;
        $this->_path = $path;
        $this->_item = $item;
    }

    /**
     * Deletes the current node.
     */
    public function delete()
    {
        list($base) = explode('/', $this->_path);
        try {
            $this->_registry->callByPackage(
                $base,
                'path_delete',
                array($this->_path)
            );
        } catch (Horde_Exception_NotFound $e) {
            throw new DAV\Exception\NotFound($this->_path . ' not found');
        } catch (Horde_Exception $e) {
            throw new DAV\Exception($e);
        }
    }

    /**
     * Returns the name of the node.
     *
     * This is used to generate the url.
     *
     * @return string
     */
    public function getName()
    {
        list($dir, $base) = DAV\URLUtil::splitPath($this->_path);
        return $base;
    }

    /**
     * Returns the last modification time, as a unix timestamp
     *
     * @return int
     */
    public function getLastModified()
    {
        if (!empty($this->_item['modified'])) {
            return $this->_item['modified'];
        }
        if (!empty($this->_item['created'])) {
            return $this->_item['created'];
        }
        return parent::getLastModified();
    }

    /**
     * Updates the data
     *
     * data is a readable stream resource.
     *
     * @param resource $data
     * @return void
     */
    public function put($data)
    {
        list($base) = explode('/', $this->_path);
        try {
            rewind($data);
            $this->_registry->callByPackage(
                $base,
                'put',
                array(
                    $this->_path,
                    stream_get_contents($data),
                    $this->getContentType() ?: 'application/octet-stream'
                )
            );
        } catch (Horde_Exception_NotFound $e) {
            throw new DAV\Exception\NotFound($this->_path . ' not found');
        } catch (Horde_Exception $e) {
            throw new DAV\Exception($e);
        }
    }

    /**
     * Returns the data
     *
     * This method may either return a string or a readable stream resource
     *
     * @return mixed
     */
    public function get()
    {
        list($base) = explode('/', $this->_path);
        try {
            $items = $this->_registry->callByPackage(
                $base, 'browse', array($this->_path)
            );
        } catch (Horde_Exception_NotFound $e) {
            throw new DAV\Exception\NotFound($this->_path . ' not found');
        } catch (Horde_Exception $e) {
            throw new DAV\Exception($e);
        }

        if (!$items) {
            throw new DAV\Exception\NotFound($this->_path . ' not found');
        }

        $item = reset($items);
        $this->_size = strlen($item);

        return $item;
    }

    /**
     * Returns the size of the file, in bytes.
     *
     * @return int
     */
    public function getSize()
    {
        return isset($this->_size)
            ? $this->_size
            : (isset($this->_item['contentlength'])
                ? $this->_item['contentlength']
                : null);
    }

    /**
     * Returns the ETag for a file.
     *
     * @return string|null
     */
    public function getETag()
    {
        return empty($this->_item['etag']) ? null : $this->_item['etag'];
    }

    /**
     * Returns the mime-type for a file
     *
     * If null is returned, we'll assume application/octet-stream
     *
     * @return string|null
     */
    public function getContentType()
    {
        return isset($this->_item['contenttype'])
            ? $this->_item['contenttype']
            : null;
    }

    /**
     * Updates properties on this node.
     *
     * @param array $mutations
     * @return bool|array
     */
    public function updateProperties($mutations)
    {
        return false;
    }

    /**
     * Returns a list of properties for this nodes.
     *
     * @param array $properties
     * @return void
     */
    public function getProperties($properties)
    {
        $response = array();
        foreach (self::$_propertyMap as $property => $apiProperty) {
            if (isset($this->_item[$apiProperty])) {
                $response[$property] = $this->_item[$apiProperty];
            }
        }
        if (isset($this->_item['modified'])) {
            $response['{DAV:}getlastmodified'] = new DAV\Property\GetLastModified(
                $this->_item['modified']
            );
        }
        if (isset($this->_item['displayname'])) {
            $response['{DAV:}displayname'] = $this->_item['displayname'];
        } elseif (isset($this->_item['name'])) {
            $response['{DAV:}displayname'] = $this->_item['name'];
        }
        return $response;
    }
}
