DaPortal

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<?php //$Id$

//This file is part of DeforaOS Web DaPortal

//This program is free software: you can redistribute it and/or modify

//it under the terms of the GNU General Public License as published by

//the Free Software Foundation, version 3 of the License.

//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 General Public License for more details.

//You should have received a copy of the GNU General Public License

//along with this program. If not, see <http://www.gnu.org/licenses/>.

//AtomFormat

class AtomFormat extends Format

{

//methods

//essential

//AtomFormat::match

protected function match(Engine $engine, $type = FALSE)

{

switch($type)

{

case 'application/rss+xml':

return 100;

default:

return 0;

}

//AtomFormat::attach

protected function attach(Engine $engine, $type = FALSE)

{

//for escaping

if(!defined('ENT_XML1'))

define('ENT_XML1', 0);

}

//public

//methods

//rendering

//AtomFormat::render

public function render(Engine $engine, PageElement $page,

$filename = FALSE)

{

global $config;

$encoding = 'utf-8';

$version = '2.0';

$title = $page->getProperty('title');

$text = $page->getProperty('text');

$request = $engine->getRequest();

$link = $engine->getURL($request);

$this->engine = $engine;

if(($charset = $config->get('defaults', 'charset')) !== FALSE)

$encoding = $charset;

$title = '';

print('<?xml version="1.0" encoding="'

.$this->escapeAttribute($encoding).'"?>'."\n");

//begin

print('<rss version="'.$this->escapeAttribute($version).'"'

.' xmlns:atom="http://www.w3.org/2005/Atom">

<channel>'."\n");

if($title !== FALSE)

print("\t\t<title>".$this->escape($title)."</title>\n");

if($link !== FALSE)

{

print("\t\t<link>".$this->escape($link)."</link>\n");

print("\t\t".'<atom:link href="'

.$this->escapeAttribute($link).'"'

.' rel="self"'

.' type="application/rss+xml"/>'."\n");

}

if($text !== FALSE)

print("\t\t<description>".$this->escape($text)

."</description>\n");

$children = $page->getChildren();

foreach($children as $c)

{

if(($type = $c->getType()) != 'row')

continue;

print("\t\t<item>\n");

//properties

$this->_renderTag($c, 'title');

$this->_renderTag($c, 'author', 'username');

//XXX format the date as expected

$this->_renderTag($c, 'pubDate', 'timestamp');

$this->_renderTagLink($c, 'link');

$this->_renderTagLink($c, 'guid');

$this->_renderTag($c, 'description', 'content');

print("\t\t</item>\n");

}

//end

print("\t</channel>

</rss>\n");

$this->engine = FALSE;

}

private function _renderTag($row, $tag, $property = FALSE)

{

if($property === FALSE)

$property = $tag;

$text = $row->getProperty($property);

if($text instanceof PageElement)

$text = $text->getProperty('text');

if($text === FALSE)

return;

print("\t\t\t<$tag>".$this->escape($text)."</$tag>\n");

}

private function _renderTagLink($row, $tag)

{

$title = $row->getProperty('title');

if(!($title instanceof PageElement))

return FALSE;

$request = $title->getProperty('request');

if($request === FALSE)

return;

print("\t\t\t<$tag>".$this->engine->getURL($request, TRUE)

."</$tag>\n");

}

//private

//properties

private $engine = FALSE;

//methods

//escaping

private function escape($text)

{

return str_replace(array('<', '>'), array('<', '>'),

$text);

}

//escapeAttribute

private function escapeAttribute($text)

{

return htmlspecialchars($text, ENT_COMPAT | ENT_XML1);

}