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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* Base class for forms
*
* 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 Widget
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @author Sarven Capadisli <csarven@controlyourself.ca>
* @copyright 2009 Control Yourself, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
if (!defined('LACONICA')) {
exit(1);
}
require_once INSTALLDIR.'/lib/widget.php';
/**
* Base class for forms
*
* We have a lot of common forms (subscribe, fave, delete) and this superclass
* lets us abstract out the basic features of the form.
*
* @category Widget
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @author Sarven Capadisli <csarven@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*
* @see HTMLOutputter
*/
class Form extends Widget
{
/**
* Show the form
*
* Uses a recipe to output the form.
*
* @return void
* @see Widget::show()
*/
function show()
{
$this->out->elementStart('form',
array('id' => $this->id(),
'method' => 'POST',
'action' => $this->action()));
$this->sessionToken();
$this->formData();
$this->formActions();
$this->out->elementEnd('form');
}
/**
* Include a session token for CSRF protection
*
* @return void
*/
function sessionToken()
{
$this->out->hidden('token', common_session_token());
}
/**
* Visible or invisible data elements
*
* Display the form fields that make up the data of the form.
* Sub-classes should overload this to show their data.
*
* @return void
*/
function formData()
{
}
/**
* Buttons for form actions
*
* Submit and cancel buttons (or whatever)
* Sub-classes should overload this to show their own buttons.
*
* @return void
*/
function formActions()
{
}
/**
* ID of the form
*
* Should be unique on the page. Sub-classes should overload this
* to show their own IDs.
*
* @return int ID of the form
*/
function id()
{
return null;
}
/**
* Action of the form.
*
* URL to post to. Should be overloaded by subclasses to give
* somewhere to post to.
*
* @return string URL to post to
*/
function action()
{
}
}
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