folders.inc
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folders.inc
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	<?php

	/*
	+-----------------------------------------------------------------------+
	\| program/steps/settings/folders.inc \|
	\| \|
	\| This file is part of the Roundcube Webmail client \|
	\| Copyright (C) 2005-2009, The Roundcube Dev Team \|
	\| \|
	\| Licensed under the GNU General Public License version 3 or \|
	\| any later version with exceptions for skins & plugins. \|
	\| See the README file for a full license statement. \|
	\| \|
	\| PURPOSE: \|
	\| Provide functionality of folders management \|
	\| \|
	+-----------------------------------------------------------------------+
	\| Author: Thomas Bruederli <roundcube@gmail.com> \|
	\| Author: Aleksander Machniak <alec@alec.pl> \|
	+-----------------------------------------------------------------------+

	$Id$

	*/

	// WARNING: folder names in UI are encoded with RCMAIL_CHARSET

	// init IMAP connection
	$STORAGE = $RCMAIL->get_storage();

	// subscribe mailbox
	if ($RCMAIL->action == 'subscribe')
	{
	$mbox = get_input_value('_mbox', RCUBE_INPUT_POST, true, 'UTF7-IMAP');
	if (strlen($mbox)) {
	$result = $STORAGE->subscribe(array($mbox));

	// Handle virtual (non-existing) folders
	if (!$result && $STORAGE->get_error_code() == -1 &&
	$STORAGE->get_response_code() == rcube_storage::TRYCREATE
	) {
	$result = $STORAGE->create_folder($mbox, true);
	if ($result) {
	// @TODO: remove 'virtual' class of folder's row
	}
	}

	if ($result) {
	// Handle subscription of protected folder (#1487656)
	if ($CONFIG['protect_default_folders'] == true
	&& in_array($mbox, $CONFIG['default_folders'])
	) {
	$OUTPUT->command('disable_subscription', $mbox);
	}

	$OUTPUT->show_message('foldersubscribed', 'confirmation');
	}
	else
	rcmail_display_server_error('errorsaving');
	}
	}

	// unsubscribe mailbox
	else if ($RCMAIL->action == 'unsubscribe')
	{
	$mbox = get_input_value('_mbox', RCUBE_INPUT_POST, true, 'UTF7-IMAP');
	if (strlen($mbox)) {
	$result = $STORAGE->unsubscribe(array($mbox));
	if ($result)
	$OUTPUT->show_message('folderunsubscribed', 'confirmation');
	else
	rcmail_display_server_error('errorsaving');
	}
	}

	// delete an existing mailbox
	else if ($RCMAIL->action == 'delete-folder')
	{
	$mbox_utf8 = get_input_value('_mbox', RCUBE_INPUT_POST, true);
	$mbox = rcube_charset_convert($mbox_utf8, RCMAIL_CHARSET, 'UTF7-IMAP');

	if (strlen($mbox)) {
	$plugin = $RCMAIL->plugins->exec_hook('folder_delete', array('name' => $mbox));

	if (!$plugin['abort']) {
	$deleted = $STORAGE->delete_folder($plugin['name']);
	}
	else {
	$deleted = $plugin['result'];
	}
	}

	if ($OUTPUT->ajax_call && $deleted) {
	// Remove folder and subfolders rows
	$OUTPUT->command('remove_folder_row', $mbox_utf8, true);
	$OUTPUT->show_message('folderdeleted', 'confirmation');
	// Clear content frame
	$OUTPUT->command('subscription_select');
	$OUTPUT->command('set_quota', rcmail_quota_content());
	}
	else if (!$deleted) {
	rcmail_display_server_error('errorsaving');
	}
	}

	// rename an existing mailbox
	else if ($RCMAIL->action == 'rename-folder')
	{
	$name_utf8 = trim(get_input_value('_folder_newname', RCUBE_INPUT_POST, true));
	$oldname_utf8 = trim(get_input_value('_folder_oldname', RCUBE_INPUT_POST, true));

	if (strlen($name_utf8) && strlen($oldname_utf8)) {
	$name = rcube_charset_convert($name_utf8, RCMAIL_CHARSET, 'UTF7-IMAP');
	$oldname = rcube_charset_convert($oldname_utf8, RCMAIL_CHARSET, 'UTF7-IMAP');

	$rename = rcmail_rename_folder($oldname, $name);
	}

	if ($rename && $OUTPUT->ajax_call) {
	rcmail_update_folder_row($name, $oldname);
	}
	else if (!$rename) {
	rcmail_display_server_error('errorsaving');
	}
	}

	// clear mailbox
	else if ($RCMAIL->action == 'purge')
	{
	$mbox_utf8 = get_input_value('_mbox', RCUBE_INPUT_POST, true);
	$mbox = rcube_charset_convert($mbox_utf8, RCMAIL_CHARSET, 'UTF7-IMAP');
	$delimiter = $STORAGE->get_hierarchy_delimiter();
	$trash_regexp = '/^' . preg_quote($CONFIG['trash_mbox'] . $delimiter, '/') . '/';

	// we should only be purging trash (or their subfolders)
	if (!strlen($CONFIG['trash_mbox']) \|\| $mbox == $CONFIG['trash_mbox']
	\|\| preg_match($trash_regexp, $mbox)
	) {
	$success = $STORAGE->delete_message('*', $mbox);
	$delete = true;
	}
	// copy to Trash
	else {
	$success = $STORAGE->move_message('1:*', $CONFIG['trash_mbox'], $mbox);
	$delete = false;
	}

	if ($success) {
	$OUTPUT->set_env('messagecount', 0);
	if ($delete) {
	$OUTPUT->show_message('folderpurged', 'confirmation');
	$OUTPUT->command('set_quota', rcmail_quota_content());
	}
	else {
	$OUTPUT->show_message('messagemoved', 'confirmation');
	}
	$_SESSION['unseen_count'][$mbox] = 0;
	$OUTPUT->command('show_folder', $mbox_utf8, null, true);
	}
	else {
	rcmail_display_server_error('errorsaving');
	}
	}

	// get mailbox size
	else if ($RCMAIL->action == 'folder-size')
	{
	$name = trim(get_input_value('_mbox', RCUBE_INPUT_POST, true));

	$size = $STORAGE->folder_size($name);

	// @TODO: check quota and show percentage usage of specified mailbox?

	if ($size !== false) {
	$OUTPUT->command('folder_size_update', show_bytes($size));
	}
	else {
	rcmail_display_server_error();
	}
	}

	if ($OUTPUT->ajax_call)
	$OUTPUT->send();


	// build table with all folders listed by server
	function rcube_subscription_form($attrib)
	{
	global $RCMAIL, $OUTPUT;

	list($form_start, $form_end) = get_form_tags($attrib, 'folders');
	unset($attrib['form']);

	if (!$attrib['id'])
	$attrib['id'] = 'rcmSubscriptionlist';

	$table = new html_table();

	if ($attrib['noheader'] !== true && $attrib['noheader'] != "true") {
	// add table header
	$table->add_header('name', rcube_label('foldername'));
	$table->add_header('subscribed', '');
	}

	$STORAGE = $RCMAIL->get_storage();

	// get folders from server
	$STORAGE->clear_cache('mailboxes', true);

	$a_unsubscribed = $STORAGE->list_folders();
	$a_subscribed = $STORAGE->list_folders_subscribed('', '*', null, null, true); // unsorted
	$delimiter = $STORAGE->get_hierarchy_delimiter();
	$namespace = $STORAGE->get_namespace();
	$a_js_folders = array();
	$seen = array();
	$list_folders = array();

	$default_folders = (array) $RCMAIL->config->get('default_folders');
	$protect_default = $RCMAIL->config->get('protect_default_folders');

	// pre-process folders list
	foreach ($a_unsubscribed as $i => $folder) {
	$folder_id = $folder;
	$folder = $STORAGE->mod_folder($folder);
	$foldersplit = explode($delimiter, $folder);
	$name = rcube_charset_convert(array_pop($foldersplit), 'UTF7-IMAP');
	$parent_folder = join($delimiter, $foldersplit);
	$level = count($foldersplit);

	// add any necessary "virtual" parent folders
	if ($parent_folder && !isset($seen[$parent_folder])) {
	for ($i=1; $i<=$level; $i++) {
	$ancestor_folder = join($delimiter, array_slice($foldersplit, 0, $i));
	if ($ancestor_folder && !$seen[$ancestor_folder]++) {
	$ancestor_name = rcube_charset_convert($foldersplit[$i-1], 'UTF7-IMAP');
	$list_folders[] = array(
	'id' => $ancestor_folder,
	'name' => $ancestor_name,
	'level' => $i-1,
	'virtual' => true,
	);
	}
	}
	}

	// Handle properly INBOX.INBOX situation
	if (isset($seen[$folder])) {
	continue;
	}

	$seen[$folder]++;

	$list_folders[] = array(
	'id' => $folder_id,
	'name' => $name,
	'level' => $level,
	);
	}

	unset($seen);

	// add drop-target representing 'root'
	$table->add_row(array('id' => 'mailboxroot', 'class' => 'virtual root'));
	$table->add('name', ' ');
	$table->add(null, ' ');

	$a_js_folders['mailboxroot'] = array('', '', true);

	$checkbox_subscribe = new html_checkbox(array(
	'name' => '_subscribed[]',
	'title' => rcube_label('changesubscription'),
	'onclick' => JS_OBJECT_NAME.".command(this.checked?'subscribe':'unsubscribe',this.value)",
	));

	// create list of available folders
	foreach ($list_folders as $i => $folder) {
	$idx = $i + 1;
	$sub_key = array_search($folder['id'], $a_subscribed);
	$subscribed = $sub_key !== false;
	$protected = $protect_default && in_array($folder['id'], $default_folders);
	$noselect = false;
	$classes = array($i%2 ? 'even' : 'odd');

	$folder_js = Q($folder['id']);
	$folder_utf8 = rcube_charset_convert($folder['id'], 'UTF7-IMAP');
	$display_folder = str_repeat('    ', $folder['level'])
	. Q($protected ? rcmail_localize_foldername($folder['id']) : $folder['name']);

	if ($folder['virtual']) {
	$classes[] = 'virtual';
	}

	if (!$protected) {
	$attrs = $STORAGE->folder_attributes($folder['id']);
	$noselect = in_array('\\Noselect', $attrs);
	}

	$disabled = (($protected && $subscribed) \|\| $noselect);

	// check if the folder is a namespace prefix, then disable subscription option on it
	if (!$disabled && $folder['virtual'] && $folder['level'] == 0 && !empty($namespace)) {
	$fname = $folder['id'] . $delimiter;
	foreach ($namespace as $ns) {
	if (is_array($ns)) {
	foreach ($ns as $item) {
	if ($item[0] === $fname) {
	$disabled = true;
	break 2;
	}
	}
	}
	}
	}
	// check if the folder is an other users virtual-root folder, then disable subscription option on it
	if (!$disabled && $folder['virtual'] && $folder['level'] == 1
	&& !empty($namespace) && !empty($namespace['other'])
	) {
	$parts = explode($delimiter, $folder['id']);
	$fname = $parts[0] . $delimiter;
	foreach ($namespace['other'] as $item) {
	if ($item[0] === $fname) {
	$disabled = true;
	break;
	}
	}
	}
	// check if the folder is shared, then disable subscription option on it
	if (!$disabled && $folder['virtual'] && !empty($namespace)) {
	$tmp_ns = array_merge((array)$namespace['other'], (array)$namespace['shared']);
	foreach ($tmp_ns as $item) {
	if (strpos($folder['id'], $item[0]) === 0) {
	$disabled = true;
	break;
	}
	}
	}

	$table->add_row(array('id' => 'rcmrow'.$idx, 'class' => join(' ', $classes),
	'foldername' => $folder['id']));

	$table->add('name', $display_folder);
	$table->add('subscribed', $checkbox_subscribe->show(($subscribed ? $folder_utf8 : ''),
	array('value' => $folder_utf8, 'disabled' => $disabled ? 'disabled' : '')));

	$a_js_folders['rcmrow'.$idx] = array($folder_utf8,
	Q($display_folder), $protected \|\| $folder['virtual']);
	}

	$RCMAIL->plugins->exec_hook('folders_list', array('table' => $table));

	$OUTPUT->add_gui_object('subscriptionlist', $attrib['id']);
	$OUTPUT->set_env('subscriptionrows', $a_js_folders);
	$OUTPUT->set_env('defaultfolders', $default_folders);
	$OUTPUT->set_env('delimiter', $delimiter);

	return $form_start . $table->show($attrib) . $form_end;
	}

	function rcmail_folder_frame($attrib)
	{
	global $OUTPUT;

	if (!$attrib['id'])
	$attrib['id'] = 'rcmfolderframe';

	$attrib['name'] = $attrib['id'];

	$OUTPUT->set_env('contentframe', $attrib['name']);
	$OUTPUT->set_env('blankpage', $attrib['src'] ? $OUTPUT->abs_url($attrib['src']) : 'program/blank.gif');

	return html::iframe($attrib);
	}

	function rcmail_rename_folder($oldname, $newname)
	{
	global $RCMAIL;

	$storage = $RCMAIL->get_storage();
	$delimiter = $storage->get_hierarchy_delimiter();

	$plugin = $RCMAIL->plugins->exec_hook('folder_rename', array(
	'oldname' => $oldname, 'newname' => $newname));

	if (!$plugin['abort']) {
	$renamed = $storage->rename_folder($oldname, $newname);
	}
	else {
	$renamed = $plugin['result'];
	}

	// update per-folder options for modified folder and its subfolders
	if ($renamed) {
	$a_threaded = (array) $RCMAIL->config->get('message_threading', array());
	$oldprefix = '/^' . preg_quote($oldname . $delimiter, '/') . '/';

	foreach ($a_threaded as $key => $val) {
	if ($key == $oldname) {
	unset($a_threaded[$key]);
	$a_threaded[$newname] = true;
	}
	else if (preg_match($oldprefix, $key)) {
	unset($a_threaded[$key]);
	$a_threaded[preg_replace($oldprefix, $newname.$delimiter, $key)] = true;
	}
	}
	$RCMAIL->user->save_prefs(array('message_threading' => $a_threaded));

	return true;
	}

	return false;
	}


	$OUTPUT->set_pagetitle(rcube_label('folders'));
	$OUTPUT->include_script('list.js');
	$OUTPUT->set_env('quota', $STORAGE->get_capability('QUOTA'));
	$OUTPUT->set_env('prefix_ns', $STORAGE->get_namespace('prefix'));

	// add some labels to client
	$OUTPUT->add_label('deletefolderconfirm', 'purgefolderconfirm', 'folderdeleting',
	'foldermoving', 'foldersubscribing', 'folderunsubscribing', 'quota');

	// register UI objects
	$OUTPUT->add_handlers(array(
	'foldersubscription' => 'rcube_subscription_form',
	'folderframe' => 'rcmail_folder_frame',
	'quotadisplay' => 'rcmail_quota_display',
	));

	$OUTPUT->send('folders');

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