gnu-social/lib/conversationtree.php

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2011-09-24 14:29:12 +01:00
<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2011, StatusNet, Inc.
*
* Conversation tree widget for oooooold school playas
*
* PHP version 5
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Widget
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2011 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
// This check helps protect against security problems;
// your code file can't be executed directly from the web.
exit(1);
}
/**
* Conversation tree
*
* The widget class for displaying a hierarchical list of notices.
*
* @category Widget
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://status.net/
*/
class ConversationTree extends NoticeList
{
var $tree = null;
var $table = null;
/**
* Show the tree of notices
*
* @return void
*/
function show()
{
$cnt = $this->_buildTree();
$this->out->elementStart('div', array('id' =>'notices_primary'));
// TRANS: Header on conversation page. Hidden by default (h2).
$this->out->element('h2', null, _('Notices'));
$this->out->elementStart('ol', array('class' => 'notices xoxo'));
if (array_key_exists('root', $this->tree)) {
$rootid = $this->tree['root'][0];
$this->showNoticePlus($rootid);
}
$this->out->elementEnd('ol');
$this->out->elementEnd('div');
return $cnt;
}
function _buildTree()
{
$cnt = 0;
$this->tree = array();
$this->table = array();
while ($this->notice->fetch()) {
$cnt++;
$id = $this->notice->id;
$notice = clone($this->notice);
$this->table[$id] = $notice;
if (is_null($notice->reply_to)) {
$this->tree['root'] = array($notice->id);
} else if (array_key_exists($notice->reply_to, $this->tree)) {
$this->tree[$notice->reply_to][] = $notice->id;
} else {
$this->tree[$notice->reply_to] = array($notice->id);
}
}
return $cnt;
}
/**
* Shows a notice plus its list of children.
*
* @param integer $id ID of the notice to show
*
* @return void
*/
function showNoticePlus($id)
{
$notice = $this->table[$id];
$this->out->elementStart('li', array('class' => 'hentry notice',
'id' => 'notice-' . $id));
$item = $this->newListItem($notice);
$item->show();
if (array_key_exists($id, $this->tree)) {
$children = $this->tree[$id];
$this->out->elementStart('ol', array('class' => 'notices'));
sort($children);
foreach ($children as $child) {
$this->showNoticePlus($child);
}
$this->out->elementEnd('ol');
}
$this->out->elementEnd('li');
}
/**
* Override parent class to return our preferred item.
*
* @param Notice $notice Notice to display
*
* @return NoticeListItem a list item to show
*/
function newListItem($notice)
{
return new ConversationTreeItem($notice, $this->out);
}
}
/**
* Conversation tree list item
*
* Special class of NoticeListItem for use inside conversation trees.
*
* @category Widget
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://status.net/
*/
class ConversationTreeItem extends NoticeListItem
{
/**
* start a single notice.
*
* The default creates the <li>; we skip, since the ConversationTree
* takes care of that.
*
* @return void
*/
function showStart()
{
return;
}
/**
* finish the notice
*
* The default closes the <li>; we skip, since the ConversationTree
* takes care of that.
*
* @return void
*/
function showEnd()
{
return;
}
/**
* show link to notice conversation page
*
* Since we're only used on the conversation page, we skip this
*
* @return void
*/
function showContext()
{
return;
}
/**
* show people this notice is in reply to
*
* Tree context shows this, so we skip it.
*
* @return void
*/
function showAddressees()
{
return;
}
}