gnu-social/lib/noticelist.php

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<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* widget for displaying a list of notices
*
* PHP version 5
*
* LICENCE: 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 UI
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @author Sarven Capadisli <csarven@status.net>
* @copyright 2008 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
*/
if (!defined('GNUSOCIAL') && !defined('STATUSNET')) { exit(1); }
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/**
* widget for displaying a list of notices
*
* There are a number of actions that display a list of notices, in
* reverse chronological order. This widget abstracts out most of the
* code for UI for notice lists. It's overridden to hide some
* data for e.g. the profile page.
*
* @category UI
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
* @see Notice
* @see NoticeListItem
* @see ProfileNoticeList
*/
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class NoticeList extends Widget
{
/** the current stream of notices being displayed. */
var $notice = null;
protected $addressees = true;
protected $attachments = true;
protected $id_prefix = null;
protected $maxchars = 0;
protected $options = true;
protected $show_n = NOTICES_PER_PAGE;
/**
* constructor
*
* @param Notice $notice stream of notices from DB_DataObject
*/
function __construct(Notice $notice, $out=null, array $prefs=array())
{
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parent::__construct($out);
$this->notice = $notice;
// integer preferences
foreach(array('show_n', 'maxchars') as $key) {
if (array_key_exists($key, $prefs)) {
$this->$key = (int)$prefs[$key];
}
}
// boolean preferences
foreach(array('addressees', 'attachments', 'options') as $key) {
if (array_key_exists($key, $prefs)) {
$this->$key = (bool)$prefs[$key];
}
}
// string preferences
foreach(array('id_prefix') as $key) {
if (array_key_exists($key, $prefs)) {
$this->$key = $prefs[$key];
}
}
}
/**
* show the list of notices
*
* "Uses up" the stream by looping through it. So, probably can't
* be called twice on the same list.
*
* @param integer $n The amount of notices to show.
*
* @return int Total amount of notices actually available.
*/
public function show()
{
$this->out->elementStart('ol', array('class' => 'notices xoxo'));
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$notices = $this->notice->fetchAll();
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$total = count($notices);
$notices = array_slice($notices, 0, $this->show_n);
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self::prefill($notices);
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foreach ($notices as $notice) {
try {
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$item = $this->newListItem($notice);
$item->show();
} catch (Exception $e) {
// we log exceptions and continue
common_log(LOG_ERR, $e->getMessage());
continue;
}
}
$this->out->elementEnd('ol');
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return $total;
}
/**
* returns a new list item for the current notice
*
* Recipe (factory?) method; overridden by sub-classes to give
* a different list item class.
*
* @param Notice $notice the current notice
*
* @return NoticeListItem a list item for displaying the notice
*/
function newListItem(Notice $notice)
{
$prefs = array('addressees' => $this->addressees,
'attachments' => $this->attachments,
'id_prefix' => $this->id_prefix,
'maxchars' => $this->maxchars,
'options' => $this->options);
return new NoticeListItem($notice, $this->out, $prefs);
}
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static function prefill(array &$notices)
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{
$scoped = Profile::current();
$notice_ids = Notice::_idsOf($notices);
if (Event::handle('StartNoticeListPrefill', array(&$notices, $notice_ids, $scoped))) {
// Prefill attachments
Notice::fillAttachments($notices);
// Prefill the profiles
$profiles = Notice::fillProfiles($notices);
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Event::handle('EndNoticeListPrefill', array(&$notices, &$profiles, $notice_ids, $scoped));
}
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}
}