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<?php

/**
* ZipDownload
*
* Plugin to allow the download of all message attachments in one zip file
*
* @version @package_version@
* @requires php_zip extension (including ZipArchive class)
* @author Philip Weir
* @author Thomas Bruderli
*/
class zipdownload extends rcube_plugin
{
public $task = 'mail';
private $charset = 'ASCII';

/**
* Plugin initialization
*/
public function init()
{
// check requirements first
if (!class_exists('ZipArchive', false)) {
rcmail::raise_error(array(
'code' => 520, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => "php_zip extension is required for the zipdownload plugin"), true, false);
return;
}

$rcmail = rcmail::get_instance();
$this->charset = $rcmail->config->get('zipdownload_charset', RCMAIL_CHARSET);

$this->load_config();
$this->add_texts('localization');

if ($rcmail->config->get('zipdownload_attachments', 1) > -1 && ($rcmail->action == 'show' || $rcmail->action == 'preview'))
$this->add_hook('template_object_messageattachments', array($this, 'attachment_ziplink'));

$this->register_action('plugin.zipdownload.zip_attachments', array($this, 'download_attachments'));
$this->register_action('plugin.zipdownload.zip_messages', array($this, 'download_selection'));
$this->register_action('plugin.zipdownload.zip_folder', array($this, 'download_folder'));

if ($rcmail->config->get('zipdownload_folder', false) || $rcmail->config->get('zipdownload_selection', false)) {
$this->include_script('zipdownload.js');
$this->api->output->set_env('zipdownload_selection', $rcmail->config->get('zipdownload_selection', false));

if ($rcmail->config->get('zipdownload_folder', false) && ($rcmail->action == '' || $rcmail->action == 'show')) {
$zipdownload = $this->api->output->button(array('command' => 'plugin.zipdownload.zip_folder', 'type' => 'link', 'classact' => 'active', 'content' => $this->gettext('downloadfolder')));
$this->api->add_content(html::tag('li', array('class' => 'separator_above'), $zipdownload), 'mailboxoptions');
}
}
}

/**
* Place a link/button after attachments listing to trigger download
*/
public function attachment_ziplink($p)
{
$rcmail = rcmail::get_instance();

// only show the link if there is more than the configured number of attachments
if (substr_count($p['content'], '<li') > $rcmail->config->get('zipdownload_attachments', 1)) {
$link = html::a(array(
'href' => rcmail_url('plugin.zipdownload.zip_attachments', array('_mbox' => $rcmail->output->env['mailbox'], '_uid' => $rcmail->output->env['uid'])),
'class' => 'button zipdownload',
),
Q($this->gettext('downloadall'))
);

// append link to attachments list, slightly different in some skins
switch (rcmail::get_instance()->config->get('skin')) {
case 'classic':
$p['content'] = str_replace('</ul>', html::tag('li', array('class' => 'zipdownload'), $link) . '</ul>', $p['content']);
break;

default:
$p['content'] .= $link;
break;
}

$this->include_stylesheet($this->local_skin_path() . '/zipdownload.css');
}

return $p;
}

/**
* Handler for attachment download action
*/
public function download_attachments()
{
$rcmail = rcmail::get_instance();
$imap = $rcmail->storage;
$temp_dir = $rcmail->config->get('temp_dir');
$tmpfname = tempnam($temp_dir, 'zipdownload');
$tempfiles = array($tmpfname);
$message = new rcube_message(get_input_value('_uid', RCUBE_INPUT_GET));

// open zip file
$zip = new ZipArchive();
$zip->open($tmpfname, ZIPARCHIVE::OVERWRITE);

foreach ($message->attachments as $part) {
$pid = $part->mime_id;
$part = $message->mime_parts[$pid];
$disp_name = $this->_convert_filename($part->filename, $part->charset);

if ($part->body) {
$orig_message_raw = $part->body;
$zip->addFromString($disp_name, $orig_message_raw);
}
else {
$tmpfn = tempnam($temp_dir, 'zipattach');
$tmpfp = fopen($tmpfn, 'w');
$imap->get_message_part($message->uid, $part->mime_id, $part, null, $tmpfp, true);
$tempfiles[] = $tmpfn;
fclose($tmpfp);
$zip->addFile($tmpfn, $disp_name);
}

}

$zip->close();

$filename = ($message->subject ? $message->subject : 'roundcube') . '.zip';
$this->_deliver_zipfile($tmpfname, $filename);

// delete temporary files from disk
foreach ($tempfiles as $tmpfn)
unlink($tmpfn);

exit;
}

/**
* Handler for message download action
*/
public function download_selection()
{
if (isset($_REQUEST['_uid'])) {
$uids = explode(",", get_input_value('_uid', RCUBE_INPUT_GPC));

if (sizeof($uids) > 0)
$this->_download_messages($uids);
}
}

/**
* Handler for folder download action
*/
public function download_folder()
{
$imap = rcmail::get_instance()->storage;
$mbox_name = $imap->get_folder();

// initialize searching result if search_filter is used
if ($_SESSION['search_filter'] && $_SESSION['search_filter'] != 'ALL') {
$imap->search($mbox_name, $_SESSION['search_filter'], RCMAIL_CHARSET);
}

// fetch message headers for all pages
$uids = array();
if ($count = $imap->count($mbox_name, $imap->get_threading() ? 'THREADS' : 'ALL', FALSE)) {
for ($i = 0; ($i * $imap->get_pagesize()) <= $count; $i++) {
$a_headers = $imap->list_messages($mbox_name, ($i + 1));

foreach ($a_headers as $n => $header) {
if (empty($header))
continue;

array_push($uids, $header->uid);
}
}
}

if (sizeof($uids) > 0)
$this->_download_messages($uids);
}

/**
* Helper method to packs all the given messages into a zip archive
*
* @param array List of message UIDs to download
*/
private function _download_messages($uids)
{
$rcmail = rcmail::get_instance();
$imap = $rcmail->storage;
$temp_dir = $rcmail->config->get('temp_dir');
$tmpfname = tempnam($temp_dir, 'zipdownload');
$tempfiles = array($tmpfname);

// open zip file
$zip = new ZipArchive();
$zip->open($tmpfname, ZIPARCHIVE::OVERWRITE);

foreach ($uids as $key => $uid){
$headers = $imap->get_message_headers($uid);
$subject = rcube_mime::decode_mime_string((string)$headers->subject);
$subject = $this->_convert_filename($subject);
$subject = substr($subject, 0, 16);

if (isset($subject) && $subject !="")
$disp_name = $subject . ".eml";
else
$disp_name = "message_rfc822.eml";

$disp_name = $uid . "_" . $disp_name;

$tmpfn = tempnam($temp_dir, 'zipmessage');
$tmpfp = fopen($tmpfn, 'w');
$imap->get_raw_body($uid, $tmpfp);
$tempfiles[] = $tmpfn;
fclose($tmpfp);
$zip->addFile($tmpfn, $disp_name);
}

$zip->close();

$this->_deliver_zipfile($tmpfname, $imap->get_folder() . '.zip');

// delete temporary files from disk
foreach ($tempfiles as $tmpfn)
unlink($tmpfn);

exit;
}

/**
* Helper method to send the zip archive to the browser
*/
private function _deliver_zipfile($tmpfname, $filename)
{
$browser = new rcube_browser;
send_nocacheing_headers();

if ($browser->ie && $browser->ver < 7)
$filename = rawurlencode(abbreviate_string($filename, 55));
else if ($browser->ie)
$filename = rawurlencode($filename);
else
$filename = addcslashes($filename, '"');

// send download headers
header("Content-Type: application/octet-stream");
if ($browser->ie)
header("Content-Type: application/force-download");

// don't kill the connection if download takes more than 30 sec.
@set_time_limit(0);
header("Content-Disposition: attachment; filename=\"". $filename ."\"");
header("Content-length: " . filesize($tmpfname));
readfile($tmpfname);
}

/**
* Helper function to convert filenames to the configured charset
*/
private function _convert_filename($str, $from = RCMAIL_CHARSET)
{
return strtr(rcube_charset_convert($str, $from, $this->charset), array(':'=>'', '/'=>'-'));
}
}

?>
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