mirror of
https://github.com/EGroupware/egroupware.git
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2a71bab988
To achive this, some changes to the CSS were made and the ability to return thumbnails with a given size was added to etemplate/thumbnail.php. Miniature images with dimensions smaller than one pixel are now no longer created. In this progress I discovered a minor security issue which might cause multiple egroupware instances to mix up their thumbnails in rare occasions. This was fixed by now hashing the image path together with the webserver url and the thumbnail size. In this progress, the thumbnail generation code has been restructured, making it faster and much easier to understand.
540 lines
20 KiB
PHP
540 lines
20 KiB
PHP
<?php
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/**
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* eGroupWare eTemplate Extension - VFS Widgets
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*
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* @link http://www.egroupware.org
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* @author Ralf Becker <RalfBecker@outdoor-training.de>
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @copyright 2008-10 by RalfBecker@outdoor-training.de
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* @package etemplate
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* @subpackage extensions
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* @version $Id$
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*/
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/**
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* eTemplate extension to display stuff from the VFS system
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*
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* Contains the following widgets:
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* - vfs aka File name+link: clickable filename, with evtl. clickable path-components
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* - vfs-name aka Filename: filename automatically urlencoded on return (urldecoded on display to user)
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* - vfs-size aka File size: human readable filesize, eg. 1.4k
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* - vfs-mode aka File mode: posix mode as string eg. drwxr-x---
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* - vfs-mime aka File icon: mime type icon or thumbnail (if configured AND enabled in the user-prefs)
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* - vfs-uid aka File owner: Owner of file, or 'root' if none
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* - vfs-gid aka File group: Group of file, or 'root' if none
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* - vfs-upload aka VFS file: displays either download and delete (x) links or a file upload
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* + value is either a vfs path or colon separated $app:$id:$relative_path, eg: infolog:123:special/offer
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* + if empty($id) / new entry, file is created in a hidden temporary directory in users home directory
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* and calling app is responsible to move content of that dir to entry directory, after entry is saved
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* + option: required mimetype or regular expression for mimetype to match, eg. '/^text\//i' for all text files
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* + if path ends in a slash, multiple files can be uploaded, their original filename is kept then
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*
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* All widgets accept as value a full path.
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* vfs-mime and vfs itself also allow an array with values like stat (incl. 'path'!) as value.
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* vfs-mime also allows just the mime type as value.
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* All other widgets allow additionally the nummeric value from the stat call (to not call it again).
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*/
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class vfs_widget
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{
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/**
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* exported methods of this class
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*
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* @var array
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*/
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var $public_functions = array(
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'pre_process' => True,
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'post_process' => true, // post_process is only used for vfs-upload (all other widgets set $cell['readlonly']!)
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);
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/**
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* availible extensions and there names for the editor
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*
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* @var array
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*/
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var $human_name = array(
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'vfs' => 'File name+link', // clickable filename, with evtl. clickable path-components
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'vfs-name' => 'File name', // filename automatically urlencoded
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'vfs-size' => 'File size', // human readable filesize
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'vfs-mode' => 'File mode', // posix mode as string eg. drwxr-x---
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'vfs-mime' => 'File icon', // mime type icon or thumbnail
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'vfs-uid' => 'File owner', // Owner of file, or 'root' if none
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'vfs-gid' => 'File group', // Group of file, or 'root' if none
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'vfs-upload' => 'VFS file', // displays either download and delete (x) links or a file upload
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);
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/**
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* pre-processing of the extension
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*
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* This function is called before the extension gets rendered
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*
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* @param string $form_name form-name of the control
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* @param mixed &$value value / existing content, can be modified
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* @param array &$cell array with the widget, can be modified for ui-independent widgets
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* @param array &$readonlys names of widgets as key, to be made readonly
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* @param mixed &$extension_data data the extension can store persisten between pre- and post-process
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* @param object &$tmpl reference to the template we belong too
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* @return boolean true if extra label is allowed, false otherwise
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*/
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function pre_process($form_name,&$value,&$cell,&$readonlys,&$extension_data,&$tmpl)
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{
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//echo "<p>".__METHOD__."($form_name,$value,".array2string($cell).",...)</p>\n";
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$type = $cell['type'];
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if (!in_array($type,array('vfs-name','vfs-upload'))) $cell['readonly'] = true; // to not call post-process
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// check if we have a path and not the raw value, in that case we have to do a stat first
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if (in_array($type,array('vfs-size','vfs-mode','vfs-uid','vfs-gid')) && !is_numeric($value) || $type == 'vfs' && !$value)
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{
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if (!$value || !($stat = egw_vfs::stat($value)))
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{
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if ($value) $value = lang("File '%1' not found!",urldecode($value));
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$cell = etemplate::empty_cell();
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return true; // allow extra value;
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}
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}
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$cell['type'] = 'label';
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switch($type)
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{
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case 'vfs-upload': // option: required mimetype or regular expression for mimetype to match, eg. '/^text\//i' for all text files
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if (empty($value) && preg_match('/^exec.*\[([^]]+)\]$/',$form_name,$matches)) // if no value via content array, use widget name
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{
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$value = $matches[1];
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}
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$extension_data = array('value' => $value, 'mimetype' => $cell['size'], 'type' => $type);
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if ($value[0] != '/')
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{
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list($app,$id,$relpath) = explode(':',$value,3);
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if (empty($id))
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{
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static $tmppath = array(); // static var, so all vfs-uploads get created in the same temporary dir
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if (!isset($tmppath[$app])) $tmppath[$app] = '/home/'.$GLOBALS['egw_info']['user']['account_lid'].'/.'.$app.'_'.md5(time().session_id());
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$value = $tmppath[$app];
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unset($cell['onchange']); // no onchange, if we have to use a temporary dir
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}
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else
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{
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$value = egw_link::vfs_path($app,$id,'',true);
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}
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if (!empty($relpath)) $value .= '/'.$relpath;
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}
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$path = $extension_data['path'] = $value;
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if (substr($path,-1) != '/' && self::file_exists($path) && !egw_vfs::is_dir($path)) // display download link and delete icon
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{
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$extension_data['path'] = $path;
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$cell = $this->file_widget($value,$path,$cell['name'],$cell['label']);
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}
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else // file does NOT exists --> display file upload
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{
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$cell['type'] = 'file';
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// if no explicit help message set and we only allow certain file types --> show them
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if (empty($cell['help']) && $cell['size'])
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{
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if (($type = mime_magic::mime2ext($cell['size'])))
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{
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$type = '*.'.strtoupper($type);
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}
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else
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{
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$type = $cell['size'];
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}
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$cell['help'] = lang('Allowed file type: %1',$type);
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}
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}
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// check if directory (trailing slash) is given --> upload of multiple files
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if (substr($path,-1) == '/' && egw_vfs::file_exists($path) && ($files = egw_vfs::scandir($path)))
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{
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//echo $path; _debug_array($files);
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$upload = $cell;
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$cell = etemplate::empty_cell('vbox','',array('size' => ',,0,0'));
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$extension_data['files'] = $files;
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$value = array();
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foreach($files as $file)
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{
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$file = $path.$file;
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$basename = basename($file);
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unset($widget);
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$widget = $this->file_widget($value[$basename],$file,$upload['name']."[$basename]");
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etemplate::add_child($cell,$widget);
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}
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etemplate::add_child($cell,$upload);
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}
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break;
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case 'vfs-size': // option: add size in bytes in brackets
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$value = egw_vfs::hsize($size = is_numeric($value) ? $value : $stat['size']);
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if ($cell['size']) $value .= ' ('.$size.')';
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$cell['type'] = 'label';
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break;
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case 'vfs-mode':
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$value = egw_vfs::int2mode(is_numeric($value) ? $value : $stat['mode']);
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list($span,$class) = explode(',',$cell['span'],2);
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$class .= ($class ? ' ' : '') . 'vfsMode';
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$cell['span'] = $span.','.$class;
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$cell['no_lang'] = true;
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break;
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case 'vfs-uid':
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case 'vfs-gid':
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$uid = !is_numeric($value) ? $stat[$type=='vfs-uid'?'uid':'gid'] : $value;
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$value = !$uid ? 'root' : $GLOBALS['egw']->accounts->id2name($type=='vfs-uid'?$uid:-$uid); // our internal gid's are negative!
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break;
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case 'vfs':
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if (is_array($value))
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{
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$name = $value['name'];
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$path = substr($value['path'],0,-strlen($name)-1);
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$mime = $value['mime'];
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}
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else
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{
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$name = $value;
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$path = '';
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$mime = egw_vfs::mime_content_type($value);
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$value = array();
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}
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if (($cell_name = $cell['name']) == '$row')
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{
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$cell_name = array_pop($arr=explode('][',substr($form_name,0,-1)));
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}
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$cell['name'] = '';
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$cell['type'] = 'hbox';
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$cell['size'] = '0,,0,0';
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foreach($name != '/' ? explode('/',$name) : array('') as $n => $component)
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{
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if ($n > (int)($path === '/'))
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{
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$sep = soetemplate::empty_cell('label','',array('label' => '/'));
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soetemplate::add_child($cell,$sep);
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unset($sep);
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}
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$value['c'.$n] = $component !== '' ? urldecode($component) : '/';
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$path .= ($path != '/' ? '/' : '').$component;
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// replace id's in /apps again with human readable titles
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$path_parts = explode('/',$path);
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if ($path_parts[1] == 'apps')
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{
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switch(count($path_parts))
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{
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case 2:
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$value['c'.$n] = lang('Applications');
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break;
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case 3:
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$value['c'.$n] = lang($path_parts[2]);
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break;
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case 4:
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if (is_numeric($value['c'.$n])) $value['c'.$n] .= egw_link::title($path_parts[2],$path_parts[3]);
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break;
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}
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}
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if (egw_vfs::is_readable($path)) // show link only if we have access to the file or dir
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{
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if ($n < count($comps)-1 || $mime == egw_vfs::DIR_MIME_TYPE || egw_vfs::is_dir($path))
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{
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$value['l'.$n] = '/index.php?menuaction=filemanager.filemanager_ui.index&path='.urlencode($path);
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$target = '';
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}
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else
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{
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$value['l'.$n] = egw_vfs::download_url($path);
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$target = ',,,_blank';
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}
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}
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if ($cell['onclick'])
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{
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$comp = etemplate::empty_cell('button',$cell_name.'[c'.$n.']',array(
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'size' => '1',
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'no_lang' => true,
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'span' => ',vfsFilename',
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'label' => $value['c'.$n],
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'onclick' => str_replace('$path',"'".addslashes($path)."'",$cell['onclick']),
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));
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}
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else
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{
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$comp = etemplate::empty_cell('label',$cell_name.'[c'.$n.']',array(
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'size' => ',@'.$cell_name.'[l'.$n.']'.$target,
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'no_lang' => true,
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'span' => ',vfsFilename',
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));
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}
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etemplate::add_child($cell,$comp);
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unset($comp);
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}
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unset($cell['onclick']); // otherwise it's handled by the grid too
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//_debug_array($comps); _debug_array($cell); _debug_array($value);
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break;
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case 'vfs-name': // size: [length][,maxLength[,allowPath]]
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$cell['type'] = 'text';
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list($length,$maxLength,$allowPath) = $options = explode(',',$cell['size']);
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$preg = $allowPath ? '' : '/[^\\/]/'; // no slash '/' allowed, if not allowPath set
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$cell['size'] = "$length,$maxLength,$preg";
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$value = urldecode($value);
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$extension_data = array('type' => $type,'allowPath' => $allowPath);
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break;
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case 'vfs-mime':
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if (!$value)
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{
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$cell = etemplate::empty_cell();
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return true;
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}
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if (!is_array($value))
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{
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if ($value[0] == '/' || count(explode('/',$value)) != 2)
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{
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$mime = egw_vfs::mime_content_type($path=$value);
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}
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else
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{
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$mime = $value;
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}
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}
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else
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{
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$path = $value['path'];
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$mime = $value['mime'];
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}
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//error_log(__METHOD__."() type=vfs-mime: value=".array2string($value).": mime=$mime, path=$path");
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$cell['type'] = 'image';
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$cell['label'] = mime_magic::mime2label($mime);
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list($mime_main,$mime_sub) = explode('/',$mime);
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if ($mime_main == 'egw')
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{
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$value = $mime_sub.'/navbar'; // egw-applications for link-widget
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$cell['label'] = lang($mime_sub);
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list($span,$class) = explode(',',$cell['span'],2);
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$class .= ($class ? ' ' : '') . 'vfsMimeIcon';
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$cell['span'] = $span.','.$class;
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}
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elseif($path && $mime_main == 'image' && in_array($mime_sub,array('png','jpeg','jpg','gif','bmp')) &&
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(string)$GLOBALS['egw_info']['server']['link_list_thumbnail'] != '0' &&
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(string)$GLOBALS['egw_info']['user']['preferences']['common']['link_list_thumbnail'] != '0' &&
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// check the size of the image, as too big images get no icon, but a PHP Fatal error: Allowed memory size exhausted
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(!is_array($value) && ($stat = egw_vfs::stat($path)) ? $stat['size'] : $value['size']) < 600000)
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{
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if (substr($path,0,6) == '/apps/')
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{
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$path = parse_url(egw_vfs::resolve_url_symlinks($path),PHP_URL_PATH);
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}
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// Append the "thsize" option, which will only create 16x16 thumbnails
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$value = $GLOBALS['egw']->link('/etemplate/thumbnail.php',array('path' => $path, 'thsize' => '16'));
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}
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else
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{
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$value = egw_vfs::mime_icon($mime);
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}
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// mark symlinks (check if method exists, to allow etemplate to run on 1.6 API!)
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if (method_exists('egw_vfs','is_link') && egw_vfs::is_link($path))
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{
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$broken = !egw_vfs::stat($path);
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list($span,$class) = explode(',',$cell['span'],2);
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$class .= ($class ? ' ' : '') . ($broken ? 'vfsIsBrokenLink' : 'vfsIsLink');
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$cell['span'] = $span.','.$class;
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$cell['label'] = ($broken ? lang('Broken link') : lang('Link')).': '.urldecode(egw_vfs::readlink($path)).
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(!$broken ? ' ('.$cell['label'].')' : '');
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}
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break;
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default:
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$value = 'Not yet implemented';
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}
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return true;
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}
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/**
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* Create widget with download and delete (only if dir is writable) link
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*
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* @param mixed &$value
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* @param string $path vfs path of download
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* @param string $name name of widget
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* @param string $label=null label, if not set basename($path) is used
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* @return array
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*/
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static function file_widget(&$value,$path,$name,$label=null)
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{
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$value = empty($label) ? urldecode(egw_vfs::basename($path)) : lang($label); // display (translated) Label or filename (if label empty)
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$vfs_link = etemplate::empty_cell('label',$name,array(
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'size' => ','.egw_vfs::download_url($path).',,,_blank,,'.$path,
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));
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// if dir is writable, add delete link
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if (egw_vfs::is_writable(egw_vfs::dirname($path)))
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{
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$cell = etemplate::empty_cell('hbox','',array('size' => ',,0,0'));
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etemplate::add_child($cell,$vfs_link);
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$delete_icon = etemplate::empty_cell('button',$path,array(
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'label' => 'delete',
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'size' => 'delete', // icon
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'onclick' => "return confirm('Delete this file');",
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'span' => ',leftPad5',
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));
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etemplate::add_child($cell,$delete_icon);
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}
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else
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{
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$cell = $vfs_link;
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}
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return $cell;
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}
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/**
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* Check if vfs file exists *without* using the extension
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*
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* If you rename a file, you have to clear the cache ($clear_after=true)!
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*
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* @param string &$path on call path without extension, if existing on return full path incl. extension
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* @param boolean $clear_after=null clear file-cache after (true) or before (false), default dont clear
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* @return
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*/
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static function file_exists(&$path,$clear_after=null)
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{
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static $files = array(); // static var, to scan each directory only once
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$dir = egw_vfs::dirname($path);
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if ($clear_after === false) unset($files[$dir]);
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if (!isset($files[$dir])) $files[$dir] = egw_vfs::file_exists($dir) ? egw_vfs::scandir($dir) : array();
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$basename = egw_vfs::basename($path);
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$basename_len = strlen($basename);
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$found = false;
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foreach($files[$dir] as $file)
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{
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if (substr($file,0,$basename_len) == $basename)
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{
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$path = $dir.'/'.$file;
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$found = true;
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}
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}
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if ($clear_after === true) unset($files[$dir]);
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//echo "<p>".__METHOD__."($path) returning ".array2string($found)."</p>\n";
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return $found;
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}
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/**
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* postprocessing method, called after the submission of the form
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*
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* It has to copy the allowed/valid data from $value_in to $value, otherwise the widget
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* will return no data (if it has a preprocessing method). The framework insures that
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* the post-processing of all contained widget has been done before.
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*
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* Only used by vfs-upload so far
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*
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* @param string $name form-name of the widget
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* @param mixed &$value the extension returns here it's input, if there's any
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* @param mixed &$extension_data persistent storage between calls or pre- and post-process
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* @param boolean &$loop can be set to true to request a re-submision of the form/dialog
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* @param object &$tmpl the eTemplate the widget belongs too
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* @param mixed &value_in the posted values (already striped of magic-quotes)
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* @return boolean true if $value has valid content, on false no content will be returned!
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*/
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function post_process($name,&$value,&$extension_data,&$loop,&$tmpl,$value_in)
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{
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//error_log(__METHOD__."('$name',".array2string($value).','.array2string($extension_data).",$loop,,".array2string($value_in).')');
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//echo '<p>'.__METHOD__."('$name',".array2string($value).','.array2string($extension_data).",$loop,,".array2string($value_in).")</p>\n";
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if (!$extension_data) return false;
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switch($extension_data['type'])
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{
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case 'vfs-name':
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$value = $extension_data['allowPath'] ? egw_vfs::encodePath($value_in) : egw_vfs::encodePathComponent($value_in);
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return true;
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case 'vfs-upload':
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break; // handeled below
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default:
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return false;
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}
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// from here on vfs-upload only!
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// check if delete icon clicked
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if ($_POST['submit_button'] == ($fname = str_replace($extension_data['value'],$extension_data['path'],$name)) ||
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substr($extension_data['path'],-1) == '/' && substr($_POST['submit_button'],0,strlen($fname)-1) == substr($fname,0,-1))
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{
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if (substr($extension_data['path'],-1) == '/') // multiple files?
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{
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foreach($extension_data['files'] as $file) // check of each single file, to not allow deleting of arbitrary files
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{
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if ($_POST['submit_button'] == substr($fname,0,-1).$file.']')
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{
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if (!egw_vfs::unlink($extension_data['path'].$file))
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{
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etemplate::set_validation_error($name,lang('Error deleting %1!',urldecode($extension_data['path'].$file)));
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}
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break;
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}
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}
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}
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elseif (!egw_vfs::unlink($extension_data['path']))
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{
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etemplate::set_validation_error($name,lang('Error deleting %1!',urldecode($extension_data['path'])));
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}
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$loop = true;
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return false;
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}
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// handle file upload
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$name = preg_replace('/^exec\[([^]]+)\](.*)$/','\\1\\2',$name); // remove exec prefix
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if (!is_array($_FILES['exec']) || !($filename = etemplate::get_array($_FILES['exec']['name'],$name)))
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{
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return false; // no file attached
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}
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$tmp_name = etemplate::get_array($_FILES['exec']['tmp_name'],$name);
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$error = etemplate::get_array($_FILES['exec']['error'],$name);
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if ($error)
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{
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etemplate::set_validation_error($name,lang('Error uploading file!')."\n".
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etemplate::max_upload_size_message());
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$loop = true;
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return false;
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}
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if (empty($tmp_name) || function_exists('is_uploaded_file') && !is_uploaded_file($tmp_name) || !file_exists($tmp_name))
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{
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return false;
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}
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// check if type matches required mime-type, if specified
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if (!empty($extension_data['mimetype']))
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{
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$type = etemplate::get_array($_FILES['exec']['type'],$name);
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$is_preg = $extension_data['mimetype'][0] == '/';
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if (!$is_preg && strcasecmp($extension_data['mimetype'],$type) || $is_preg && !preg_match($extension_data['mimetype'],$type))
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{
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etemplate::set_validation_error($name,lang('File is of wrong type (%1 != %2)!',$type,$extension_data['mimetype']));
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return false;
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}
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}
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$path = $extension_data['path'];
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if (substr($path,-1) != '/')
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{
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// add extension to path
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$parts = explode('.',$filename);
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if (($extension = array_pop($parts)) && mime_magic::ext2mime($extension)) // really an extension --> add it to path
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{
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$path .= '.'.$extension;
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}
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}
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else // multiple upload with dir given (trailing slash)
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{
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$path .= egw_vfs::encodePathComponent($filename);
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}
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if (!egw_vfs::file_exists($dir = egw_vfs::dirname($path)) && !egw_vfs::mkdir($dir,null,STREAM_MKDIR_RECURSIVE))
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{
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etemplate::set_validation_error($name,lang('Error create parent directory %1!',urldecode($dir)));
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return false;
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}
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if (!copy($tmp_name,egw_vfs::PREFIX.$path))
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{
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etemplate::set_validation_error($name,lang('Error copying uploaded file to vfs!'));
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return false;
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}
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$value = $path; // return path of file, important if only a temporary location is used
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return true;
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}
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}
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