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Edit File: Notify.php

<?php

/**
 * This file contains just the functions that turn on and off notifications
 * to topics or boards.
 *
 * Simple Machines Forum (SMF)
 *
 * @package SMF
 * @author Simple Machines https://www.simplemachines.org
 * @copyright 2022 Simple Machines and individual contributors
 * @license https://www.simplemachines.org/about/smf/license.php BSD
 *
 * @version 2.1.0
 */

if (!defined('SMF'))
	die('No direct access...');

/**
 * Turn off/on notification for a particular board.
 * Must be called with a board specified in the URL.
 * Only uses the template if no mode (or subaction) was given.
 * Redirects the user back to the board after it is done.
 * Accessed via ?action=notifyboard.
 *
 * @uses template_notify_board()
 */
function BoardNotify()
{
	global $board, $user_info, $context, $smcFunc, $sourcedir, $scripturl, $txt;

require_once($sourcedir . '/Subs-Notify.php');

// Subscribing or unsubscribing with a token.
	if (isset($_REQUEST['u']) && isset($_REQUEST['token']))
	{
		$member_info = getMemberWithToken('board');
		$skipCheckSession = true;
	}
	// No token, so try with the current user.
	else
	{
		// Permissions are an important part of anything ;).
		is_not_guest();
		$member_info = $user_info;
	}

// You have to specify a board to turn notifications on!
	if (empty($board))
		fatal_lang_error('no_board', false);

// sa=on/off is used for email subscribe/unsubscribe links
	if (!isset($_GET['mode']) && isset($_GET['sa']))
	{
		$_GET['mode'] = $_GET['sa'] == 'on' ? 3 : -1;
		unset($_GET['sa']);
	}

// No mode: find out what to do.
	if (!isset($_GET['mode']) && !isset($_GET['xml']))
	{
		// We're gonna need the notify template...
		loadTemplate('Notify');

// Find out if they have notification set for this board already.
		$request = $smcFunc['db_query']('', '
			SELECT id_member
			FROM {db_prefix}log_notify
			WHERE id_member = {int:current_member}
				AND id_board = {int:current_board}
			LIMIT 1',
			array(
				'current_board' => $board,
				'current_member' => $member_info['id'],
			)
		);
		$context['notification_set'] = $smcFunc['db_num_rows']($request) != 0;
		$smcFunc['db_free_result']($request);

if ($member_info['id'] !== $user_info['id'])
			$context['notify_info'] = array(
				'u' => $member_info['id'],
				'token' => $_REQUEST['token'],
			);

// Set the template variables...
		$context['board_href'] = $scripturl . '?board=' . $board . '.' . $_REQUEST['start'];
		$context['start'] = $_REQUEST['start'];
		$context['page_title'] = $txt['notification'];
		$context['sub_template'] = 'notify_board';

return;
	}
	elseif (isset($_GET['mode']))
	{
		if (empty($skipCheckSession))
			checkSession('get');

$mode = (int) $_GET['mode'];

// -1 is used to turn off email notifications while leaving the alert pref unchanged.
		if ($mode == -1)
			$mode = min(2, getNotifyPrefs($member_info['id'], array('board_notify_' . $board), true));

$alertPref = $mode <= 1 ? 0 : ($mode == 2 ? 1 : 3);

setNotifyPrefs((int) $member_info['id'], array('board_notify_' . $board => $alertPref));

if ($mode > 1)
			// Turn notification on.  (note this just blows smoke if it's already on.)
			$smcFunc['db_insert']('ignore',
				'{db_prefix}log_notify',
				array('id_member' => 'int', 'id_topic' => 'int', 'id_board' => 'int'),
				array($user_info['id'], 0, $board),
				array('id_member', 'id_topic', 'id_board')
			);
		else
			$smcFunc['db_query']('', '
				DELETE FROM {db_prefix}log_notify
				WHERE id_member = {int:current_member}
					AND id_board = {int:current_board}',
				array(
					'current_board' => $board,
					'current_member' => $member_info['id'],
				)
			);
	}

if (isset($_GET['xml']))
	{
		$context['xml_data']['errors'] = array(
			'identifier' => 'error',
			'children' => array(
				array(
					'value' => 0,
				),
			),
		);
		$context['sub_template'] = 'generic_xml';
	}
	// Probably followed an unsubscribe link, so just show a confirmation message.
	elseif (!empty($skipCheckSession) && isset($mode))
	{
		loadTemplate('Notify');
		$context['page_title'] = $txt['notification'];
		$context['sub_template'] = 'notify_pref_changed';
		$context['notify_success_msg'] = sprintf($txt['notify_board' . ($mode == 3 ? '_subscribed' : '_unsubscribed')], $member_info['email']);
		return;
	}
	// Back to the board!
	else
		redirectexit('board=' . $board . '.' . $_REQUEST['start']);
}

/**
 * Turn off/on unread replies subscription for a topic as well as sets individual topic's alert preferences
 * Must be called with a topic specified in the URL.
 * The mode can be from 0 to 3
 * 0 => unwatched, 1 => no alerts/emails, 2 => alerts, 3 => emails/alerts
 * Upon successful completion of action will direct user back to topic.
 * Accessed via ?action=notifytopic.
 */
function TopicNotify()
{
	global $smcFunc, $user_info, $topic, $sourcedir, $context, $scripturl, $txt;

require_once($sourcedir . '/Subs-Notify.php');

if (isset($_REQUEST['u']) && isset($_REQUEST['token']))
	{
		$member_info = getMemberWithToken('topic');
		$skipCheckSession = true;
	}
	else
	{
		is_not_guest();
		$member_info = $user_info;
	}

// Make sure the topic has been specified.
	if (empty($topic))
		fatal_lang_error('not_a_topic', false);

// sa=on/off is used to toggle email notifications
	if (!isset($_GET['mode']) && isset($_GET['sa']))
	{
		$_GET['mode'] = $_GET['sa'] == 'on' ? 3 : -1;
		unset($_GET['sa']);
	}

// What do we do?  Better ask if they didn't say..
	if (!isset($_GET['mode']) && !isset($_GET['xml']))
	{
		// Load the template, but only if it is needed.
		loadTemplate('Notify');

// Find out if they have notification set for this topic already.
		$request = $smcFunc['db_query']('', '
			SELECT id_member
			FROM {db_prefix}log_notify
			WHERE id_member = {int:current_member}
				AND id_topic = {int:current_topic}
			LIMIT 1',
			array(
				'current_member' => $member_info['id'],
				'current_topic' => $topic,
			)
		);
		$context['notification_set'] = $smcFunc['db_num_rows']($request) != 0;
		$smcFunc['db_free_result']($request);

if ($member_info['id'] !== $user_info['id'])
			$context['notify_info'] = array(
				'u' => $member_info['id'],
				'token' => $_REQUEST['token'],
			);

// Set the template variables...
		$context['topic_href'] = $scripturl . '?topic=' . $topic . '.' . $_REQUEST['start'];
		$context['start'] = $_REQUEST['start'];
		$context['page_title'] = $txt['notification'];

return;
	}
	elseif (isset($_GET['mode']))
	{
		if (empty($skipCheckSession))
			checkSession('get');

$mode = (int) $_GET['mode'];

// Turn off email notifications while leaving the alert pref alone.
		if ($mode == -1)
			$mode = min(2, getNotifyPrefs($member_info['id'], array('topic_notify_' . $topic), true));

$alertPref = $mode <= 1 ? 0 : ($mode == 2 ? 1 : 3);

$request = $smcFunc['db_query']('', '
			SELECT id_member, id_topic, id_msg, unwatched
			FROM {db_prefix}log_topics
			WHERE id_member = {int:current_user}
				AND id_topic = {int:current_topic}',
			array(
				'current_user' => $member_info['id'],
				'current_topic' => $topic,
			)
		);
		$log = $smcFunc['db_fetch_assoc']($request);
		$smcFunc['db_free_result']($request);
		if (empty($log))
		{
			$insert = true;
			$log = array(
				'id_member' => $member_info['id'],
				'id_topic' => $topic,
				'id_msg' => 0,
				'unwatched' => empty($mode) ? 1 : 0,
			);
		}
		else
		{
			$insert = false;
			$log['unwatched'] = empty($mode) ? 1 : 0;
		}

$smcFunc['db_insert']($insert ? 'insert' : 'replace',
			'{db_prefix}log_topics',
			array(
				'id_member' => 'int', 'id_topic' => 'int', 'id_msg' => 'int', 'unwatched' => 'int',
			),
			$log,
			array('id_member', 'id_topic')
		);

setNotifyPrefs((int) $member_info['id'], array('topic_notify_' . $log['id_topic'] => $alertPref));

if ($mode > 1)
		{
			// Turn notification on.  (note this just blows smoke if it's already on.)
			$smcFunc['db_insert']('ignore',
				'{db_prefix}log_notify',
				array('id_member' => 'int', 'id_topic' => 'int', 'id_board' => 'int'),
				array($user_info['id'], $log['id_topic'], 0),
				array('id_member','id_topic', 'id_board')
			);
		}
		else
			$smcFunc['db_query']('', '
				DELETE FROM {db_prefix}log_notify
				WHERE id_topic = {int:topic}
					AND id_member = {int:member}',
				array(
					'topic' => $log['id_topic'],
					'member' => $member_info['id'],
				)
			);
	}

if (isset($_GET['xml']))
	{
		$context['xml_data']['errors'] = array(
			'identifier' => 'error',
			'children' => array(
				array(
					'value' => 0,
				),
			),
		);
		$context['sub_template'] = 'generic_xml';
	}
	// Probably followed an unsubscribe link, so just show a confirmation message.
	elseif (!empty($skipCheckSession) && isset($mode))
	{
		loadTemplate('Notify');
		$context['page_title'] = $txt['notification'];
		$context['sub_template'] = 'notify_pref_changed';
		$context['notify_success_msg'] = sprintf($txt['notify_topic' . ($mode == 3 ? '_subscribed' : '_unsubscribed')], $member_info['email']);
		return;
	}
	// Back to the topic.
	else
		redirectexit('topic=' . $topic . '.' . $_REQUEST['start']);
}

/**
 * Turn off/on notifications for announcements.
 * Only uses the template if no mode was given.
 * Accessed via ?action=notifyannouncements.
 */
function AnnouncementsNotify()
{
	global $scripturl, $txt, $board, $user_info, $context, $smcFunc, $sourcedir;

require_once($sourcedir . '/Subs-Notify.php');

if (isset($_REQUEST['u']) && isset($_REQUEST['token']))
	{
		$member_info = getMemberWithToken('announcements');
		$skipCheckSession = true;
	}
	else
	{
		is_not_guest();
		$member_info = $user_info;
	}

loadTemplate('Notify');
	$context['page_title'] = $txt['notification'];

// Backward compatibility.
	if (!isset($_GET['mode']) && isset($_GET['sa']))
	{
		$_GET['mode'] = $_GET['sa'] == 'on' ? 1 : 0;
		unset($_GET['sa']);
	}

// Ask what they want to do.
	if (!isset($_GET['mode']))
	{
		$context['sub_template'] = 'notify_announcements';

if ($member_info['id'] !== $user_info['id'])
			$context['notify_info'] = array(
				'u' => $member_info['id'],
				'token' => $_REQUEST['token'],
			);

return;
	}

// We don't tolerate imposters around here.
	if (empty($skipCheckSession))
		checkSession('get');

$mode = (int) !empty($_GET['mode']);

// Update their announcement notification preference.
	setNotifyPrefs((int) $member_info['id'], array('announcements' => $mode));

// Show a confirmation message.
	$context['sub_template'] = 'notify_pref_changed';
	$context['notify_success_msg'] = sprintf($txt['notify_announcements' . (!empty($mode) ? '_subscribed' : '_unsubscribed')], $member_info['email']);
}