gnu-social/actions/conversation.php

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<?php
/**
* Display a conversation in the browser
*
* PHP version 5
*
* @category Action
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://laconi.ca/
*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2009, Control Yourself, Inc.
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*
* 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/>.
*/
if (!defined('LACONICA')) {
exit(1);
}
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// XXX: not sure how to do paging yet,
// so set a 60-notice limit
define('CONVERSATION_LIMIT', 60);
require_once INSTALLDIR.'/lib/noticelist.php';
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/**
* Conversation tree in the browser
*
* @category Action
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://laconi.ca/
*/
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class ConversationAction extends Action
{
var $id = null;
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var $page = null;
/**
* Initialization.
*
* @param array $args Web and URL arguments
*
* @return boolean false if id not passed in
*/
function prepare($args)
{
parent::prepare($args);
$this->id = $this->trimmed('id');
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if (empty($this->id)) {
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return false;
}
$this->id = $this->id+0;
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$this->page = $this->trimmed('page');
if (empty($this->page)) {
$this->page = 1;
}
return true;
}
/**
* Handle the action
*
* @param array $args Web and URL arguments
*
* @return void
*/
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function handle($args)
{
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parent::handle($args);
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$this->showPage();
}
/**
* Returns the page title
*
* @return string page title
*/
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function title()
{
return _("Conversation");
}
/**
* Show content.
*
* Display a hierarchical unordered list in the content area.
* Uses ConversationTree to do most of the heavy lifting.
*
* @return void
*/
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function showContent()
{
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$notices = Notice::conversationStream($this->id, null, CONVERSATION_LIMIT);
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$ct = new ConversationTree($notices, $this);
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$cnt = $ct->show();
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}
}
/**
* Conversation tree
*
* The widget class for displaying a hierarchical list of notices.
*
* @category Widget
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://laconi.ca/
*/
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class ConversationTree extends NoticeList
{
var $tree = null;
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var $table = null;
/**
* Show the tree of notices
*
* @return void
*/
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function show()
{
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$cnt = $this->_buildTree();
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$this->out->elementStart('div', array('id' =>'notices_primary'));
$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()
{
$this->tree = array();
$this->table = array();
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while ($this->notice->fetch()) {
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$cnt++;
$id = $this->notice->id;
$notice = clone($this->notice);
$this->table[$id] = $notice;
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if (is_null($notice->reply_to)) {
$this->tree['root'] = array($notice->id);
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} 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);
}
}
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return $cnt;
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}
/**
* Shows a notice plus its list of children.
*
* @param integer $id ID of the notice to show
*
* @return void
*/
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function showNoticePlus($id)
{
$notice = $this->table[$id];
// We take responsibility for doing the li
$this->out->elementStart('li', array('class' => 'hentry notice',
'id' => 'notice-' . $id));
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$item = $this->newListItem($notice);
$item->show();
if (array_key_exists($id, $this->tree)) {
$children = $this->tree[$id];
$this->out->elementStart('ol', array('class' => 'notices'));
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sort($children);
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foreach ($children as $child) {
$this->showNoticePlus($child);
}
$this->out->elementEnd('ol');
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}
$this->out->elementEnd('li');
}
/**
* Override parent class to return our preferred item.
*
* @param Notice $notice Notice to display
*
* @return NoticeListItem a list item to show
*/
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function newListItem($notice)
{
return new ConversationTreeItem($notice, $this->out);
}
}
/**
* Conversation tree list item
*
* Special class of NoticeListItem for use inside conversation trees.
*
* @category Widget
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://laconi.ca/
*/
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class ConversationTreeItem extends NoticeListItem
{
/**
* start a single notice.
*
* The default creates the <li>; we skip, since the ConversationTree
* takes care of that.
*
* @return void
*/
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function showStart()
{
return;
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}
/**
* finish the notice
*
* The default closes the <li>; we skip, since the ConversationTree
* takes care of that.
*
* @return void
*/
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function showEnd()
{
return;
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}
/**
* show link to notice conversation page
*
* Since we're only used on the conversation page, we skip this
*
* @return void
*/
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function showContext()
{
return;
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}
}