gnu-social/actions/newmessage.php

<?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 NewmessageAction extends Action {
	
	function handle($args) {
		parent::handle($args);

		if (!common_logged_in()) {
			$this->client_error(_('Not logged in.'), 403);
		} else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
			$this->save_new_message();
		} else {
			$this->show_form();
		}
	}

	function save_new_message() {
		$user = common_current_user();
		assert($user); # XXX: maybe an error instead...

		# 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;
		}
		
		$content = $this->trimmed('content');
		$to = $this->trimmed('to');
		
		if (!$content) {
			$this->show_form(_('No content!'));
			return;
		} else {
			$content_shortened = common_shorten_links($content);

			if (mb_strlen($content_shortened) > 140) {
				common_debug("Content = '$content_shortened'", __FILE__);
				common_debug("mb_strlen(\$content) = " . mb_strlen($content_shortened), __FILE__);
				$this->show_form(_('That\'s too long. Max message size is 140 chars.'));
				return;
			}
		}

		$other = User::staticGet('id', $to);
		
		if (!$other) {
			$this->show_form(_('No recipient specified.'));
			return;
		} else if (!$user->mutuallySubscribed($other)) {
			$this->client_error(_('You can\'t send a message to this user.'), 404);
			return;
		} else if ($user->id == $other->id) {
			$this->client_error(_('Don\'t send a message to yourself; just say it to yourself quietly instead.'), 403);
			return;
		}
		
		$message = Message::saveNew($user->id, $other->id, $content, 'web');
		
		if (is_string($message)) {
			$this->show_form($message);
			return;
		}

		$this->notify($user, $other, $message);

		$url = common_local_url('outbox', array('nickname' => $user->nickname));

		common_redirect($url, 303);
	}

	function show_top($params) {

		list($content, $user, $to) = $params;
		
		assert(!is_null($user));

		common_message_form($content, $user, $to);
	}

	function show_form($msg=NULL) {
		
		$content = $this->trimmed('content');
		$user = common_current_user();

		$to = $this->trimmed('to');
		
		$other = User::staticGet('id', $to);

		if (!$other) {
			$this->client_error(_('No such user'), 404);
			return;
		}

		if (!$user->mutuallySubscribed($other)) {
			$this->client_error(_('You can\'t send a message to this user.'), 404);
			return;
		}
		
		common_show_header(_('New message'), NULL,
						   array($content, $user, $other),
		                   array($this, 'show_top'));
		
		if ($msg) {
			common_element('p', array('id'=>'error'), $msg);
		}
		
		common_show_footer();
	}
	
	function notify($from, $to, $message) {
		mail_notify_message($message, $from, $to);
		# XXX: Jabber, SMS notifications... probably queued
	}
}