<?php
/*
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2008, Controlez-Vous, Inc.
 *
 * 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); }

require_once(INSTALLDIR.'/lib/settingsaction.php');
require_once(INSTALLDIR.'/lib/openid.php');

class OpenidsettingsAction extends SettingsAction {

	function get_instructions() {
		return _('[OpenID](%%doc.openid%%) lets you log into many sites ' .
		          ' with the same user account. '.
		          ' Manage your associated OpenIDs from here.');
	}

	function show_form($msg=NULL, $success=false) {

		$user = common_current_user();

		$this->form_header(_('OpenID settings'), $msg, $success);

		common_element_start('form', array('method' => 'post',
										   'id' => 'openidadd',
										   'action' =>
										   common_local_url('openidsettings')));
		common_hidden('token', common_session_token());
		common_element('h2', NULL, _('Add OpenID'));
		common_element('p', NULL,
					   _('If you want to add an OpenID to your account, ' .
						  'enter it in the box below and click "Add".'));
		common_element_start('p');
		common_element('label', array('for' => 'openid_url'),
					   _('OpenID URL'));
		common_element('input', array('name' => 'openid_url',
									  'type' => 'text',
									  'id' => 'openid_url'));
		common_element('input', array('type' => 'submit',
									  'id' => 'add',
									  'name' => 'add',
									  'class' => 'submit',
									  'value' => _('Add')));
		common_element_end('p');
		common_element_end('form');

		$oid = new User_openid();
		$oid->user_id = $user->id;

		$cnt = $oid->find();

		if ($cnt > 0) {

			common_element('h2', NULL, _('Remove OpenID'));

			if ($cnt == 1 && !$user->password) {

				common_element('p', NULL,
							   _('Removing your only OpenID would make it impossible to log in! ' .
								  'If you need to remove it, add another OpenID first.'));

				if ($oid->fetch()) {
					common_element_start('p');
					common_element('a', array('href' => $oid->canonical),
								   $oid->display);
					common_element_end('p');
				}

			} else {

				common_element('p', NULL,
							   _('You can remove an OpenID from your account '.
								  'by clicking the button marked "Remove".'));
				$idx = 0;

				while ($oid->fetch()) {
					common_element_start('form', array('method' => 'POST',
													   'id' => 'openiddelete' . $idx,
													   'action' =>
													   common_local_url('openidsettings')));
					common_element_start('p');
					common_hidden('token', common_session_token());
					common_element('a', array('href' => $oid->canonical),
								   $oid->display);
					common_element('input', array('type' => 'hidden',
												  'id' => 'openid_url'.$idx,
												  'name' => 'openid_url',
												  'value' => $oid->canonical));
					common_element('input', array('type' => 'submit',
												  'id' => 'remove'.$idx,
												  'name' => 'remove',
												  'class' => 'submit',
												  'value' => _('Remove')));
					common_element_end('p');
					common_element_end('form');
					$idx++;
				}
			}
		}

		common_show_footer();
	}

	function handle_post() {
		# CSRF protection
		$token = $this->trimmed('token');
		if (!$token || $token != common_session_token()) {
			$this->show_form(_('There was a problem with your session token. Try again, please.'));
			return;
		}

		if ($this->arg('add')) {
			$result = oid_authenticate($this->trimmed('openid_url'), 'finishaddopenid');
			if (is_string($result)) { # error message
				$this->show_form($result);
			}
		} else if ($this->arg('remove')) {
			$this->remove_openid();
		} else {
			$this->show_form(_('Something weird happened.'));
		}
	}

	function remove_openid() {

		$openid_url = $this->trimmed('openid_url');
		$oid = User_openid::staticGet('canonical', $openid_url);
		if (!$oid) {
			$this->show_form(_('No such OpenID.'));
			return;
		}
		$cur = common_current_user();
		if (!$cur || $oid->user_id != $cur->id) {
			$this->show_form(_('That OpenID does not belong to you.'));
			return;
		}
		$oid->delete();
		$this->show_form(_('OpenID removed.'), true);
		return;
	}
}