<?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); }

class InviteAction extends Action {
	
	function is_readonly() {				
		return false;
	}
	
    function handle($args) {
        parent::handle($args);
		if (!common_logged_in()) {
			$this->client_error(sprintf(_('You must be logged in to invite other users to use %s'),
										common_config('site', 'name')));
			return;
		} else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
			$this->send_invitation();
		} else {
			$this->show_form();
		}
	}
	
	function send_invitation() {
		
		$user = common_current_user();
		$profile = $user->getProfile();
		
		$bestname = $profile->getBestName();
		$sitename = common_config('site', 'name');
		$personal = $this->trimmed('personal');

		$addresses = explode("\n", $this->trimmed('addresses'));
		
		foreach ($addresses as $email) {
			
			$email = trim($email);
			
			if (!Validate::email($email, true)) {
				$this->show_form(sprintf(_('Invalid email address: %s'), $email));
				return;
			}
		}
		
		foreach ($addresses as $email) {
			
			$email = trim($email);
			
			$recipients = array($email);
			
			$headers['From'] = mail_notify_from();
			$headers['To'] = $email;
			$headers['Subject'] = sprintf(_('%1s has invited you to join them on %2s'), $bestname, $sitename);

			$body = sprintf(_("%1s has invited you to join them on %2s (%3s).\n\n".
							  "%4s is a micro-blogging service that lets you keep up-to-date with people you know and people who interest you.\n\n".
							  "You can also share news about yourself, your thoughts, or your life online with people who know about you.\n\n".
							  "%5s said:\n\n%6s\n\n".
							  "You can see %7s's profile page on %8s here:\n\n".
							  "%9s\n\n".
							  "If you'd like to try the service, click on the link below to accept the invitation.\n\n".
							  "%10s\n\n".
							  "If not, you can ignore this message. Thanks for your patience and your time.\n\n".
							  "Sincerely, %11s\n"),
							$bestname, $sitename, common_root_url(),
							$sitename,
							$bestname, $personal,
							$bestname, $sitename,
							common_local_url('showstream', array('nickname' => $user->nickname)),
							common_local_url('register', array('code' => $invite->code)),
							$sitename);
			
			mail_send($recipients, $headers, $body);
		}
		

		common_show_header(_('Invitation(s) sent'));
		common_element('p', NULL, _('Invitation(s) sent. You will be notified when your invitees accept the invitation and register on the site. Thanks for growing the community!'));
		common_show_footer();
	}
	
	function show_top($error=NULL) {
		if ($error) {
			common_element('p', 'error', $error);
		} else {
			common_element_start('div', 'instructions');
			common_element('p', NULL,
						   _('Use this form to invite your friends and colleagues to use this service.'));
			common_element_end('div');
		}
	}

	function show_form($error=NULL) {
		
		global $config;

		common_show_header(_('Invite new users'), NULL, $error, array($this, 'show_top'));

		common_element_start('form', array('method' => 'post',
										   'id' => 'invite',
										   'action' => common_local_url('invite')));

		common_textarea('addresses', _('Email addresses'),
						$this->trimmed('addresses'),
						_('Addresses of friends to invite (one per line)'));
		
		common_textarea('personal', _('Personal message'),
						$this->trimmed('personal'),
						_('Optionally add a personal message to the invitation.'));
		
		common_submit('preview', _('Preview'));

		common_element_end('form');
		
		common_show_footer();
	}
}