<?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('Mail.php');

function mail_backend() {
	static $backend = NULL;

	if (!$backend) {
		global $config;
		$backend = Mail::factory($config['mail']['backend'],
								 ($config['mail']['params']) ? $config['mail']['params'] : array());
		if (PEAR::isError($backend)) {
			common_server_error($backend->getMessage(), 500);
		}
	}
	return $backend;
}

# XXX: use Mail_Queue... maybe

function mail_send($recipients, $headers, $body) {
	$backend = mail_backend();
	assert($backend); # throws an error if it's bad
	$sent = $backend->send($recipients, $headers, $body);
	if (PEAR::isError($sent)) {
		common_log(LOG_ERR, 'Email error: ' . $sent->getMessage());
		return false;
	}
	return true;
}

function mail_domain() {
	$maildomain = common_config('mail', 'domain');
	if (!$maildomain) {
		$maildomain = common_config('site', 'server');
	}
	return $maildomain;
}

function mail_notify_from() {
	$notifyfrom = common_config('mail', 'notifyfrom');
	if (!$notifyfrom) {
		$domain = mail_domain();
		$notifyfrom = common_config('site', 'name') .' <noreply@'.$domain.'>';
	}
	return $notifyfrom;
}

function mail_to_user(&$user, $subject, $body, $address=NULL) {
	if (!$address) {
		$address = $user->email;
	}

	$recipients = $address;
	$profile = $user->getProfile();

	$headers['From'] = mail_notify_from();
	$headers['To'] = $profile->getBestName() . ' <' . $address . '>';
	$headers['Subject'] = $subject;

	return mail_send($recipients, $headers, $body);
}

# For confirming a Jabber address
# XXX: change to use mail_to_user() above

function mail_confirm_address($code, $nickname, $address) {
	$recipients = $address;
	$headers['From'] = mail_notify_from();
	$headers['To'] = $nickname . ' <' . $address . '>';
	$headers['Subject'] = _('Email address confirmation');

	$body = "Hey, $nickname.";
	$body .= "\n\n";
	$body .= 'Someone just entered this email address on ' . common_config('site', 'name') . '.';
	$body .= "\n\n";
	$body .= 'If it was you, and you want to confirm your entry, use the URL below:';
	$body .= "\n\n";
	$body .= "\t".common_local_url('confirmaddress',
								   array('code' => $code));
	$body .= "\n\n";
	$body .= 'If not, just ignore this message.';
	$body .= "\n\n";
	$body .= 'Thanks for your time, ';
	$body .= "\n";
	$body .= common_config('site', 'name');
	$body .= "\n";

	mail_send($recipients, $headers, $body);
}

function mail_subscribe_notify($listenee, $listener) {
	$other = $listener->getProfile();
	mail_subscribe_notify_profile($listenee, $other);
}

function mail_subscribe_notify_profile($listenee, $other) {
	if ($listenee->email && $listenee->emailnotifysub) {
		$profile = $listenee->getProfile();
		$name = $profile->getBestName();
		$long_name = ($other->fullname) ? ($other->fullname . ' (' . $other->nickname . ')') : $other->nickname;
		$recipients = $listenee->email;
		$headers['From'] = mail_notify_from();
		$headers['To'] = $name . ' <' . $listenee->email . '>';
		$headers['Subject'] = sprintf(_('%1$s is now listening to your notices on %2$s.'), $other->getBestName(),
									  common_config('site', 'name'));
		$body  = sprintf(_('%1$s is now listening to your notices on %2$s.'."\n\n".
						   "\t".'%3$s'."\n\n".
						   'Faithfully yours,'."\n".'%4$s.'."\n"),
						 $long_name,
						 common_config('site', 'name'),
						 $other->profileurl,
						 common_config('site', 'name'));
		mail_send($recipients, $headers, $body);
	}
}

function mail_new_incoming_notify($user) {

	$profile = $user->getProfile();
	$name = $profile->getBestName();

	$headers['From'] = $user->incomingemail;
	$headers['To'] = $name . ' <' . $user->email . '>';
	$headers['Subject'] = sprintf(_('New email address for posting to %s'),
								  common_config('site', 'name'));

	$body  = sprintf(_("You have a new posting address on %1\$s.\n\n".
					   "Send email to %2\$s to post new messages.\n\n".
					   "More email instructions at %3\$s.\n\n".
					   "Faithfully yours,\n%4\$s"),
					 common_config('site', 'name'),
					 $user->incomingemail,
					 common_local_url('doc', array('title' => 'email')),
					 common_config('site', 'name'));

	mail_send($user->email, $headers, $body);
}

function mail_new_incoming_address() {
	$prefix = common_good_rand(8);
	$suffix = mail_domain();
	return $prefix . '@' . $suffix;
}

function mail_broadcast_notice_sms($notice) {

    # Now, get users subscribed to this profile

	$user = new User();

	$user->query('SELECT nickname, smsemail, incomingemail ' .
				 'FROM user JOIN subscription ' .
				 'ON user.id = subscription.subscriber ' .
				 'WHERE subscription.subscribed = ' . $notice->profile_id . ' ' .
				 'AND user.smsemail IS NOT NULL ' .
				 'AND user.smsnotify = 1');

	while ($user->fetch()) {
		common_log(LOG_INFO,
				   'Sending notice ' . $notice->id . ' to ' . $user->smsemail,
				   __FILE__);
		$success = mail_send_sms_notice_address($notice, $user->smsemail, $user->incomingemail);
		if (!$success) {
			# XXX: Not sure, but I think that's the right thing to do
			common_log(LOG_WARNING,
					   'Sending notice ' . $notice->id . ' to ' . $user->smsemail . ' FAILED, cancelling.',
					   __FILE__);
			return false;
		}
	}

	$user->free();
	unset($user);
	
	return true;
}

function mail_send_sms_notice($notice, $user) {
	return mail_send_sms_notice_address($notice, $user->smsemail, $user->incomingemail);
}

function mail_send_sms_notice_address($notice, $smsemail, $incomingemail) {

	$to = $nickname . ' <' . $smsemail . '>';
	$other = $notice->getProfile();

	common_log(LOG_INFO, "Sending notice " . $notice->id . " to " . $smsemail, __FILE__);

	$headers = array();
	$headers['From'] = (isset($incomingemail)) ? $incomingemail : mail_notify_from();
	$headers['To'] = $to;
	$headers['Subject'] = sprintf(_('%s status'),
								  $other->getBestName());
	$body = $notice->content;

	return mail_send($smsemail, $headers, $body);
}

function mail_confirm_sms($code, $nickname, $address) {

	$recipients = $address;

	$headers['From'] = mail_notify_from();
	$headers['To'] = $nickname . ' <' . $address . '>';
	$headers['Subject'] = _('SMS confirmation');

	$body = "$nickname: confirm you own this phone number with this code:";
	$body .= "\n\n";
	$body .= $code;
	$body .= "\n\n";

	mail_send($recipients, $headers, $body);
}