streams/Zotlabs/Module/Filestorage.php

<?php
namespace Zotlabs\Module;
/**
 * @file Zotlabs/Module/Filestorage.php
 *
 */


use Zotlabs\Lib\Libsync;

class Filestorage extends \Zotlabs\Web\Controller {

	function post() {

		$channel_id = ((x($_POST, 'uid')) ? intval($_POST['uid']) : 0);

		if((! $channel_id) || (! local_channel()) || ($channel_id != local_channel())) {
			notice( t('Permission denied.') . EOL);
			return;
		}

		$recurse = ((x($_POST, 'recurse')) ? intval($_POST['recurse']) : 0);
		$resource = ((x($_POST, 'filehash')) ? notags($_POST['filehash']) : '');
		$notify = ((x($_POST, 'notify_edit')) ? intval($_POST['notify_edit']) : 0);

		if(! $resource) {
			notice(t('Item not found.') . EOL);
			return;
		}

		$channel = \App::get_channel();

		$acl = new \Zotlabs\Access\AccessList($channel);
		$acl->set_from_array($_POST);
		$x = $acl->get();

		$url = get_cloud_url($channel_id, $channel['channel_address'], $resource);

		//get the object before permissions change so we can catch eventual former allowed members
		$object = get_file_activity_object($channel_id, $resource, $url);

		attach_change_permissions($channel_id, $resource, $x['allow_cid'], $x['allow_gid'], $x['deny_cid'], $x['deny_gid'], $recurse, true);

		file_activity($channel_id, $object, $x['allow_cid'], $x['allow_gid'], $x['deny_cid'], $x['deny_gid'], 'post', $notify);

		goaway(dirname($url));
	}

	function get() {

		if(argc() > 1)
			$which = argv(1);
		else {
			notice( t('Requested profile is not available.') . EOL );
			\App::$error = 404;
			return;
		}

		$r = q("select * from channel where channel_address = '%s'",
			dbesc($which)
		);
		if($r) {
			$channel = $r[0];
			$owner = intval($r[0]['channel_id']);
		}

		$observer = \App::get_observer();
		$ob_hash = (($observer) ? $observer['xchan_hash'] : '');

		$perms = get_all_perms($owner, $ob_hash);

		if(! ($perms['view_storage'] || is_site_admin())){
			notice( t('Permission denied.') . EOL);
			return;
		}

		// Since we have ACL'd files in the wild, but don't have ACL here yet, we
		// need to return for anyone other than the owner, despite the perms check for now.

		$is_owner = (((local_channel()) && ($owner  == local_channel())) ? true : false);
		if(! ($is_owner || is_site_admin())){
			info( t('Permission Denied.') . EOL );
			return;
		}

		if(argc() > 3 && argv(3) === 'delete') {

			if(argc() > 4 && argv(4) === 'json')
				$json_return = true;


			$admin_delete = false;

			if(! $perms['write_storage']) {
				if(is_site_admin()) {
					$admin_delete = true;
				}
				else {
					notice( t('Permission denied.') . EOL);
					if($json_return) 
						json_return_and_die([ 'success' => false ]);
					return;
				}
			}

			$file = intval(argv(2));
			$r = q("SELECT hash FROM attach WHERE id = %d AND uid = %d LIMIT 1",
				dbesc($file),
				intval($owner)
			);
			if(! $r) {
				if($json_return) 
					json_return_and_die([ 'success' => false ]);

				notice( t('File not found.') . EOL);
				goaway(z_root() . '/cloud/' . $which);
			}

			$f = $r[0];

			$channel = channelx_by_n($owner);

			$url = get_cloud_url($channel['channel_id'], $channel['channel_address'], $f['hash']);

			attach_delete($owner, $f['hash']);

			if(! $admin_delete) {
				$sync = attach_export_data($channel, $f['hash'], true);
				if($sync) {
					Libsync::build_sync_packet($channel['channel_id'], array('file' => array($sync)));
				}
			}

			if(json_return)
				json_return_and_die([ 'success' => true ]);

			goaway(dirname($url));
		}

		if(argc() > 3 && argv(3) === 'edit') {
			require_once('include/acl_selectors.php');
			if(! $perms['write_storage']) {
				notice( t('Permission denied.') . EOL);
				return;
			}
			$file = intval(argv(2));

			$r = q("select id, uid, folder, filename, revision, flags, is_dir, os_storage, hash, allow_cid, allow_gid, deny_cid, deny_gid from attach where id = %d and uid = %d limit 1",
				intval($file),
				intval($owner)
			);

			$f = $r[0];
			$channel = \App::get_channel();

			$cloudpath = get_cloudpath($f);

			$aclselect_e = populate_acl($f, false, \Zotlabs\Lib\PermissionDescription::fromGlobalPermission('view_storage'));
			$is_a_dir = (intval($f['is_dir']) ? true : false);

			$lockstate = (($f['allow_cid'] || $f['allow_gid'] || $f['deny_cid'] || $f['deny_gid']) ? 'lock' : 'unlock');

			// Encode path that is used for link so it's a valid URL
			// Keep slashes as slashes, otherwise mod_rewrite doesn't work correctly
			$encoded_path = str_replace('%2F', '/', rawurlencode($cloudpath));

			$o = replace_macros(get_markup_template('attach_edit.tpl'), array(
				'$header' => t('Edit file permissions'),
				'$file' => $f,
				'$cloudpath' => z_root() . '/' . $encoded_path,
				'$uid' => $channel['channel_id'],
				'$channelnick' => $channel['channel_address'],
				'$permissions' => t('Permissions'),
				'$aclselect' => $aclselect_e,
				'$allow_cid' => acl2json($f['allow_cid']),
				'$allow_gid' => acl2json($f['allow_gid']),
				'$deny_cid' => acl2json($f['deny_cid']),
				'$deny_gid' => acl2json($f['deny_gid']),
				'$lockstate' => $lockstate,
				'$permset' => t('Set/edit permissions'),
				'$recurse' => array('recurse', t('Include all files and sub folders'), 0, '', array(t('No'), t('Yes'))),
				'$backlink' => t('Return to file list'),
				'$isadir' => $is_a_dir,
				'$cpdesc' => t('Copy/paste this code to attach file to a post'),
				'$cpldesc' => t('Copy/paste this URL to link file from a web page'),
				'$submit' => t('Submit'),
				'$attach_btn_title' => t('Share this file'),
				'$link_btn_title' => t('Show URL to this file'),
				'$notify' => array('notify_edit', t('Show in your contacts shared folder'), 0, '', array(t('No'), t('Yes'))),
			));

			echo $o;
			killme();
		}

		goaway(z_root() . '/cloud/' . $which);
	}

}