<?php

/**
 * This file has two main jobs, but they really are one.  It registers new
 * members, and it helps the administrator moderate member registrations.
 * Similarly, it handles account activation as well.
 *
 * Simple Machines Forum (SMF)
 *
 * @package SMF
 * @author Simple Machines http://www.simplemachines.org
 * @copyright 2012 Simple Machines
 * @license http://www.simplemachines.org/about/smf/license.php BSD
 *
 * @version 2.1 Alpha 1
 */

if (!defined('SMF'))
	die('Hacking attempt...');

/**
 * Begin the registration process.
 *
 * @param array $reg_errors = array()
 */
function Register($reg_errors = array())
{
	global $txt, $boarddir, $context, $settings, $modSettings, $user_info;
	global $language, $scripturl, $smcFunc, $sourcedir, $smcFunc, $cur_profile;

	// Is this an incoming AJAX check?
	if (isset($_GET['sa']) && $_GET['sa'] == 'usernamecheck')
		return RegisterCheckUsername();

	// Check if the administrator has it disabled.
	if (!empty($modSettings['registration_method']) && $modSettings['registration_method'] == '3')
		fatal_lang_error('registration_disabled', false);

	// If this user is an admin - redirect them to the admin registration page.
	if (allowedTo('moderate_forum') && !$user_info['is_guest'])
		redirectexit('action=admin;area=regcenter;sa=register');
	// You are not a guest, so you are a member - and members don't get to register twice!
	elseif (empty($user_info['is_guest']))
		redirectexit();

	loadLanguage('Login');
	loadTemplate('Register');

	// Do we need them to agree to the registration agreement, first?
	$context['require_agreement'] = !empty($modSettings['requireAgreement']);
	$context['registration_passed_agreement'] = !empty($_SESSION['registration_agreed']);
	$context['show_coppa'] = !empty($modSettings['coppaAge']);

	// Under age restrictions?
	if ($context['show_coppa'])
	{
		$context['skip_coppa'] = false;
		$context['coppa_agree_above'] = sprintf($txt[($context['require_agreement'] ? 'agreement_' : '') . 'agree_coppa_above'], $modSettings['coppaAge']);
		$context['coppa_agree_below'] = sprintf($txt[($context['require_agreement'] ? 'agreement_' : '') . 'agree_coppa_below'], $modSettings['coppaAge']);
	}

	// What step are we at?
	$current_step = isset($_REQUEST['step']) ? (int) $_REQUEST['step'] : ($context['require_agreement'] ? 1 : 2);

	// Does this user agree to the registation agreement?
	if ($current_step == 1 && (isset($_POST['accept_agreement']) || isset($_POST['accept_agreement_coppa'])))
	{
		$context['registration_passed_agreement'] = $_SESSION['registration_agreed'] = true;
		$current_step = 2;

		// Skip the coppa procedure if the user says he's old enough.
		if ($context['show_coppa'])
		{
			$_SESSION['skip_coppa'] = !empty($_POST['accept_agreement']);

			// Are they saying they're under age, while under age registration is disabled?
			if (empty($modSettings['coppaType']) && empty($_SESSION['skip_coppa']))
			{
				loadLanguage('Login');
				fatal_lang_error('under_age_registration_prohibited', false, array($modSettings['coppaAge']));
			}
		}
	}
	// Make sure they don't squeeze through without agreeing.
	elseif ($current_step > 1 && $context['require_agreement'] && !$context['registration_passed_agreement'])
		$current_step = 1;

	// Show the user the right form.
	$context['sub_template'] = $current_step == 1 ? 'registration_agreement' : 'registration_form';
	$context['page_title'] = $current_step == 1 ? $txt['registration_agreement'] : $txt['registration_form'];

	// Add the register chain to the link tree.
	$context['linktree'][] = array(
		'url' => $scripturl . '?action=register',
		'name' => $txt['register'],
	);

	// If you have to agree to the agreement, it needs to be fetched from the file.
	if ($context['require_agreement'])
	{
		// Have we got a localized one?
		if (file_exists($boarddir . '/agreement.' . $user_info['language'] . '.txt'))
			$context['agreement'] = parse_bbc(file_get_contents($boarddir . '/agreement.' . $user_info['language'] . '.txt'), true, 'agreement_' . $user_info['language']);
		elseif (file_exists($boarddir . '/agreement.txt'))
			$context['agreement'] = parse_bbc(file_get_contents($boarddir . '/agreement.txt'), true, 'agreement');
		else
			$context['agreement'] = '';

		// Nothing to show, lets disable registration and inform the admin of this error
		if (empty($context['agreement']))
		{
			// No file found or a blank file, log the error so the admin knows there is a problem!
			log_error($txt['registration_agreement_missing'], 'critical');
			fatal_lang_error('registration_disabled', false);
		}
	}

	if (!empty($modSettings['userLanguage']))
	{
		$selectedLanguage = empty($_SESSION['language']) ? $language : $_SESSION['language'];

		// Do we have any languages?
		if (empty($context['languages']))
			getLanguages();

		// Try to find our selected language.
		foreach ($context['languages'] as $key => $lang)
		{
			$context['languages'][$key]['name'] = strtr($lang['name'], array('-utf8' => ''));

			// Found it!
			if ($selectedLanguage == $lang['filename'])
				$context['languages'][$key]['selected'] = true;
		}
	}

	// Any custom fields we want filled in?
	require_once($sourcedir . '/Profile.php');
	loadCustomFields(0, 'register');

	// Or any standard ones?
	if (!empty($modSettings['registration_fields']))
	{
		require_once($sourcedir . '/Profile-Modify.php');

		// Setup some important context.
		loadLanguage('Profile');
		loadTemplate('Profile');

		$context['user']['is_owner'] = true;

		// Here, and here only, emulate the permissions the user would have to do this.
		$user_info['permissions'] = array_merge($user_info['permissions'], array('profile_account_own', 'profile_extra_own'));
		$reg_fields = explode(',', $modSettings['registration_fields']);

		// We might have had some submissions on this front - go check.
		foreach ($reg_fields as $field)
			if (isset($_POST[$field]))
				$cur_profile[$field] = $smcFunc['htmlspecialchars']($_POST[$field]);

		// Load all the fields in question.
		setupProfileContext($reg_fields);
	}

	// Generate a visual verification code to make sure the user is no bot.
	if (!empty($modSettings['reg_verification']))
	{
		require_once($sourcedir . '/Subs-Editor.php');
		$verificationOptions = array(
			'id' => 'register',
		);
		$context['visual_verification'] = create_control_verification($verificationOptions);
		$context['visual_verification_id'] = $verificationOptions['id'];
	}
	// Otherwise we have nothing to show.
	else
		$context['visual_verification'] = false;

	// Are they coming from an OpenID login attempt?
	if (!empty($_SESSION['openid']['verified']) && !empty($_SESSION['openid']['openid_uri']))
	{
		$context['openid'] = $_SESSION['openid']['openid_uri'];
		$context['username'] = $smcFunc['htmlspecialchars'](!empty($_POST['user']) ? $_POST['user'] : $_SESSION['openid']['nickname']);
		$context['email'] = $smcFunc['htmlspecialchars'](!empty($_POST['email']) ? $_POST['email'] : $_SESSION['openid']['email']);
	}
	// See whether we have some prefiled values.
	else
	{
		$context += array(
			'openid' => isset($_POST['openid_identifier']) ? $_POST['openid_identifier'] : '',
			'username' => isset($_POST['user']) ? $smcFunc['htmlspecialchars']($_POST['user']) : '',
			'email' => isset($_POST['email']) ? $smcFunc['htmlspecialchars']($_POST['email']) : '',
		);
	}

	// @todo Why isn't this a simple set operation?
	// Were there any errors?
	$context['registration_errors'] = array();
	if (!empty($reg_errors))
		foreach ($reg_errors as $error)
			$context['registration_errors'][] = $error;

	createToken('register');
}

/**
 * Actually register the member.
 *
 * @param bool $verifiedOpenID = false
 */
function Register2($verifiedOpenID = false)
{
	global $scripturl, $txt, $modSettings, $context, $sourcedir;
	global $user_info, $options, $settings, $smcFunc;

	checkSession();
	validateToken('register');

	// Start collecting together any errors.
	$reg_errors = array();

	// Did we save some open ID fields?
	if ($verifiedOpenID && !empty($context['openid_save_fields']))
	{
		foreach ($context['openid_save_fields'] as $id => $value)
			$_POST[$id] = $value;
	}

	// You can't register if it's disabled.
	if (!empty($modSettings['registration_method']) && $modSettings['registration_method'] == 3)
		fatal_lang_error('registration_disabled', false);

	// Things we don't do for people who have already confirmed their OpenID allegances via register.
	if (!$verifiedOpenID)
	{
		// Well, if you don't agree, you can't register.
		if (!empty($modSettings['requireAgreement']) && empty($_SESSION['registration_agreed']))
			redirectexit();

		// Make sure they came from *somewhere*, have a session.
		if (!isset($_SESSION['old_url']))
			redirectexit('action=register');

		// If we don't require an agreement, we need a extra check for coppa.
		if (empty($modSettings['requireAgreement']) && !empty($modSettings['coppaAge']))
			$_SESSION['skip_coppa'] = !empty($_POST['accept_agreement']);
		// Are they under age, and under age users are banned?
		if (!empty($modSettings['coppaAge']) && empty($modSettings['coppaType']) && empty($_SESSION['skip_coppa']))
		{
			// @todo This should be put in Errors, imho.
			loadLanguage('Login');
			fatal_lang_error('under_age_registration_prohibited', false, array($modSettings['coppaAge']));
		}

		// Check whether the visual verification code was entered correctly.
		if (!empty($modSettings['reg_verification']))
		{
			require_once($sourcedir . '/Subs-Editor.php');
			$verificationOptions = array(
				'id' => 'register',
			);
			$context['visual_verification'] = create_control_verification($verificationOptions, true);

			if (is_array($context['visual_verification']))
			{
				loadLanguage('Errors');
				foreach ($context['visual_verification'] as $error)
					$reg_errors[] = $txt['error_' . $error];
			}
		}
	}

	foreach ($_POST as $key => $value)
	{
		if (!is_array($_POST[$key]))
			$_POST[$key] = htmltrim__recursive(str_replace(array("\n", "\r"), '', $_POST[$key]));
	}

	// Collect all extra registration fields someone might have filled in.
	$possible_strings = array(
		'website_url', 'website_title',
		'aim', 'yim',
		'location', 'birthdate',
		'time_format',
		'buddy_list',
		'pm_ignore_list',
		'smiley_set',
		'signature', 'personal_text', 'avatar',
		'lngfile',
		'secret_question', 'secret_answer',
	);
	$possible_ints = array(
		'pm_email_notify',
		'notify_types',
		'icq',
		'gender',
		'id_theme',
	);
	$possible_floats = array(
		'time_offset',
	);
	$possible_bools = array(
		'notify_announcements', 'notify_regularity', 'notify_send_body',
		'hide_email', 'show_online',
	);

	if (isset($_POST['secret_answer']) && $_POST['secret_answer'] != '')
		$_POST['secret_answer'] = md5($_POST['secret_answer']);

	// Needed for isReservedName() and registerMember().
	require_once($sourcedir . '/Subs-Members.php');

	// Validation... even if we're not a mall.
	if (isset($_POST['real_name']) && (!empty($modSettings['allow_editDisplayName']) || allowedTo('moderate_forum')))
	{
		$_POST['real_name'] = trim(preg_replace('~[\s]~' . ($context['utf8'] ? 'u' : ''), ' ', $_POST['real_name']));
		if (trim($_POST['real_name']) != '' && !isReservedName($_POST['real_name']) && $smcFunc['strlen']($_POST['real_name']) < 60)
			$possible_strings[] = 'real_name';
	}

	if (isset($_POST['msn']) && preg_match('~^[0-9A-Za-z=_+\-/][0-9A-Za-z=_\'+\-/\.]*@[\w\-]+(\.[\w\-]+)*(\.[\w]{2,6})$~', $_POST['msn']) != 0)
		$profile_strings[] = 'msn';

	// Handle a string as a birthdate...
	if (isset($_POST['birthdate']) && $_POST['birthdate'] != '')
		$_POST['birthdate'] = strftime('%Y-%m-%d', strtotime($_POST['birthdate']));
	// Or birthdate parts...
	elseif (!empty($_POST['bday1']) && !empty($_POST['bday2']))
		$_POST['birthdate'] = sprintf('%04d-%02d-%02d', empty($_POST['bday3']) ? 0 : (int) $_POST['bday3'], (int) $_POST['bday1'], (int) $_POST['bday2']);

	// By default assume email is hidden, only show it if we tell it to.
	$_POST['hide_email'] = !empty($_POST['allow_email']) ? 0 : 1;

	// Validate the passed language file.
	if (isset($_POST['lngfile']) && !empty($modSettings['userLanguage']))
	{
		// Do we have any languages?
		if (empty($context['languages']))
			getLanguages();

		// Did we find it?
		if (isset($context['languages'][$_POST['lngfile']]))
			$_SESSION['language'] = $_POST['lngfile'];
		else
			unset($_POST['lngfile']);
	}
	else
		unset($_POST['lngfile']);

	// Set the options needed for registration.
	$regOptions = array(
		'interface' => 'guest',
		'username' => !empty($_POST['user']) ? $_POST['user'] : '',
		'email' => !empty($_POST['email']) ? $_POST['email'] : '',
		'password' => !empty($_POST['passwrd1']) ? $_POST['passwrd1'] : '',
		'password_check' => !empty($_POST['passwrd2']) ? $_POST['passwrd2'] : '',
		'openid' => !empty($_POST['openid_identifier']) ? $_POST['openid_identifier'] : '',
		'auth_method' => !empty($_POST['authenticate']) ? $_POST['authenticate'] : '',
		'check_reserved_name' => true,
		'check_password_strength' => true,
		'check_email_ban' => true,
		'send_welcome_email' => !empty($modSettings['send_welcomeEmail']),
		'require' => !empty($modSettings['coppaAge']) && !$verifiedOpenID && empty($_SESSION['skip_coppa']) ? 'coppa' : (empty($modSettings['registration_method']) ? 'nothing' : ($modSettings['registration_method'] == 1 ? 'activation' : 'approval')),
		'extra_register_vars' => array(),
		'theme_vars' => array(),
	);

	// Include the additional options that might have been filled in.
	foreach ($possible_strings as $var)
		if (isset($_POST[$var]))
			$regOptions['extra_register_vars'][$var] = $smcFunc['htmlspecialchars']($_POST[$var], ENT_QUOTES);
	foreach ($possible_ints as $var)
		if (isset($_POST[$var]))
			$regOptions['extra_register_vars'][$var] = (int) $_POST[$var];
	foreach ($possible_floats as $var)
		if (isset($_POST[$var]))
			$regOptions['extra_register_vars'][$var] = (float) $_POST[$var];
	foreach ($possible_bools as $var)
		if (isset($_POST[$var]))
			$regOptions['extra_register_vars'][$var] = empty($_POST[$var]) ? 0 : 1;

	// Registration options are always default options...
	if (isset($_POST['default_options']))
		$_POST['options'] = isset($_POST['options']) ? $_POST['options'] + $_POST['default_options'] : $_POST['default_options'];
	$regOptions['theme_vars'] = isset($_POST['options']) && is_array($_POST['options']) ? $_POST['options'] : array();

	// Make sure they are clean, dammit!
	$regOptions['theme_vars'] = htmlspecialchars__recursive($regOptions['theme_vars']);

	// Check whether we have fields that simply MUST be displayed?
	$request = $smcFunc['db_query']('', '
		SELECT col_name, field_name, field_type, field_length, mask, show_reg
		FROM {db_prefix}custom_fields
		WHERE active = {int:is_active}',
		array(
			'is_active' => 1,
		)
	);
	$custom_field_errors = array();
	while ($row = $smcFunc['db_fetch_assoc']($request))
	{
		// Don't allow overriding of the theme variables.
		if (isset($regOptions['theme_vars'][$row['col_name']]))
			unset($regOptions['theme_vars'][$row['col_name']]);

		// Not actually showing it then?
		if (!$row['show_reg'])
			continue;

		// Prepare the value!
		$value = isset($_POST['customfield'][$row['col_name']]) ? trim($_POST['customfield'][$row['col_name']]) : '';

		// We only care for text fields as the others are valid to be empty.
		if (!in_array($row['field_type'], array('check', 'select', 'radio')))
		{
			// Is it too long?
			if ($row['field_length'] && $row['field_length'] < $smcFunc['strlen']($value))
				$custom_field_errors[] = array('custom_field_too_long', array($row['field_name'], $row['field_length']));

			// Any masks to apply?
			if ($row['field_type'] == 'text' && !empty($row['mask']) && $row['mask'] != 'none')
			{
				// @todo We never error on this - just ignore it at the moment...
				if ($row['mask'] == 'email' && (preg_match('~^[0-9A-Za-z=_+\-/][0-9A-Za-z=_\'+\-/\.]*@[\w\-]+(\.[\w\-]+)*(\.[\w]{2,6})$~', $value) === 0 || strlen($value) > 255))
					$custom_field_errors[] = array('custom_field_invalid_email', array($row['field_name']));
				elseif ($row['mask'] == 'number' && preg_match('~[^\d]~', $value))
					$custom_field_errors[] = array('custom_field_not_number', array($row['field_name']));
				elseif (substr($row['mask'], 0, 5) == 'regex' && preg_match(substr($row['mask'], 5), $value) === 0)
					$custom_field_errors[] = array('custom_field_inproper_format', array($row['field_name']));
			}
		}

		// Is this required but not there?
		if (trim($value) == '' && $row['show_reg'] > 1)
			$custom_field_errors[] = array('custom_field_empty', array($row['field_name']));
	}
	$smcFunc['db_free_result']($request);

	// Process any errors.
	if (!empty($custom_field_errors))
	{
		loadLanguage('Errors');
		foreach ($custom_field_errors as $error)
			$reg_errors[] = vsprintf($txt['error_' . $error[0]], $error[1]);
	}

	// Lets check for other errors before trying to register the member.
	if (!empty($reg_errors))
	{
		$_REQUEST['step'] = 2;
		return Register($reg_errors);
	}
	// If they're wanting to use OpenID we need to validate them first.
	if (empty($_SESSION['openid']['verified']) && !empty($_POST['authenticate']) && $_POST['authenticate'] == 'openid')
	{
		// What do we need to save?
		$save_variables = array();
		foreach ($_POST as $k => $v)
			if (!in_array($k, array('sc', 'sesc', $context['session_var'], 'passwrd1', 'passwrd2', 'regSubmit')))
				$save_variables[$k] = $v;

		require_once($sourcedir . '/Subs-OpenID.php');
		smf_openID_validate($_POST['openid_identifier'], false, $save_variables);
	}
	// If we've come from OpenID set up some default stuff.
	elseif ($verifiedOpenID || (!empty($_POST['openid_identifier']) && $_POST['authenticate'] == 'openid'))
	{
		$regOptions['username'] = !empty($_POST['user']) && trim($_POST['user']) != '' ? $_POST['user'] : $_SESSION['openid']['nickname'];
		$regOptions['email'] = !empty($_POST['email']) && trim($_POST['email']) != '' ? $_POST['email'] : $_SESSION['openid']['email'];
		$regOptions['auth_method'] = 'openid';
		$regOptions['openid'] = !empty($_POST['openid_identifier']) ? $_POST['openid_identifier'] : $_SESSION['openid']['openid_uri'];
	}

	$memberID = registerMember($regOptions, true);

	// What there actually an error of some kind dear boy?
	if (is_array($memberID))
	{
		$reg_errors = array_merge($reg_errors, $memberID);
		$_REQUEST['step'] = 2;
		return Register($reg_errors);
	}

	// Do our spam protection now.
	spamProtection('register');

	// We'll do custom fields after as then we get to use the helper function!
	if (!empty($_POST['customfield']))
	{
		require_once($sourcedir . '/Profile.php');
		require_once($sourcedir . '/Profile-Modify.php');
		makeCustomFieldChanges($memberID, 'register');
	}

	// If COPPA has been selected then things get complicated, setup the template.
	if (!empty($modSettings['coppaAge']) && empty($_SESSION['skip_coppa']))
		redirectexit('action=coppa;member=' . $memberID);
	// Basic template variable setup.
	elseif (!empty($modSettings['registration_method']))
	{
		loadTemplate('Register');

		$context += array(
			'page_title' => $txt['register'],
			'title' => $txt['registration_successful'],
			'sub_template' => 'after',
			'description' => $modSettings['registration_method'] == 2 ? $txt['approval_after_registration'] : $txt['activate_after_registration']
		);
	}
	else
	{
		call_integration_hook('integrate_activate', array($regOptions['username']));

		setLoginCookie(60 * $modSettings['cookieTime'], $memberID, sha1(sha1(strtolower($regOptions['username']) . $regOptions['password']) . $regOptions['register_vars']['password_salt']));

		redirectexit('action=login2;sa=check;member=' . $memberID, $context['server']['needs_login_fix']);
	}
}

/**
 * @todo needs description
 */
function Activate()
{
	global $context, $txt, $modSettings, $scripturl, $sourcedir, $smcFunc, $language, $user_info;

	// Logged in users should not bother to activate their accounts
	if (!empty($user_info['id']))
		redirectexit();

	loadLanguage('Login');
	loadTemplate('Login');

	if (empty($_REQUEST['u']) && empty($_POST['user']))
	{
		if (empty($modSettings['registration_method']) || $modSettings['registration_method'] == '3')
			fatal_lang_error('no_access', false);

		$context['member_id'] = 0;
		$context['sub_template'] = 'resend';
		$context['page_title'] = $txt['invalid_activation_resend'];
		$context['can_activate'] = empty($modSettings['registration_method']) || $modSettings['registration_method'] == '1';
		$context['default_username'] = isset($_GET['user']) ? $_GET['user'] : '';

		return;
	}

	// Get the code from the database...
	$request = $smcFunc['db_query']('', '
		SELECT id_member, validation_code, member_name, real_name, email_address, is_activated, passwd, lngfile
		FROM {db_prefix}members' . (empty($_REQUEST['u']) ? '
		WHERE member_name = {string:email_address} OR email_address = {string:email_address}' : '
		WHERE id_member = {int:id_member}') . '
		LIMIT 1',
		array(
			'id_member' => isset($_REQUEST['u']) ? (int) $_REQUEST['u'] : 0,
			'email_address' => isset($_POST['user']) ? $_POST['user'] : '',
		)
	);

	// Does this user exist at all?
	if ($smcFunc['db_num_rows']($request) == 0)
	{
		$context['sub_template'] = 'retry_activate';
		$context['page_title'] = $txt['invalid_userid'];
		$context['member_id'] = 0;

		return;
	}

	$row = $smcFunc['db_fetch_assoc']($request);
	$smcFunc['db_free_result']($request);

	// Change their email address? (they probably tried a fake one first :P.)
	if (isset($_POST['new_email'], $_REQUEST['passwd']) && sha1(strtolower($row['member_name']) . $_REQUEST['passwd']) == $row['passwd'])
	{
		if (empty($modSettings['registration_method']) || $modSettings['registration_method'] == 3)
			fatal_lang_error('no_access', false);

		// @todo Separate the sprintf?
		if (preg_match('~^[0-9A-Za-z=_+\-/][0-9A-Za-z=_\'+\-/\.]*@[\w\-]+(\.[\w\-]+)*(\.[\w]{2,6})$~', $_POST['new_email']) == 0)
			fatal_error(sprintf($txt['valid_email_needed'], htmlspecialchars($_POST['new_email'])), false);

		// Make sure their email isn't banned.
		isBannedEmail($_POST['new_email'], 'cannot_register', $txt['ban_register_prohibited']);

		// Ummm... don't even dare try to take someone else's email!!
		$request = $smcFunc['db_query']('', '
			SELECT id_member
			FROM {db_prefix}members
			WHERE email_address = {string:email_address}
			LIMIT 1',
			array(
				'email_address' => $_POST['new_email'],
			)
		);
		// @todo Separate the sprintf?
		if ($smcFunc['db_num_rows']($request) != 0)
			fatal_lang_error('email_in_use', false, array(htmlspecialchars($_POST['new_email'])));
		$smcFunc['db_free_result']($request);

		updateMemberData($row['id_member'], array('email_address' => $_POST['new_email']));
		$row['email_address'] = $_POST['new_email'];

		$email_change = true;
	}

	// Resend the password, but only if the account wasn't activated yet.
	if (!empty($_REQUEST['sa']) && $_REQUEST['sa'] == 'resend' && ($row['is_activated'] == 0 || $row['is_activated'] == 2) && (!isset($_REQUEST['code']) || $_REQUEST['code'] == ''))
	{
		require_once($sourcedir . '/Subs-Post.php');

		$replacements = array(
			'REALNAME' => $row['real_name'],
			'USERNAME' => $row['member_name'],
			'ACTIVATIONLINK' => $scripturl . '?action=activate;u=' . $row['id_member'] . ';code=' . $row['validation_code'],
			'ACTIVATIONLINKWITHOUTCODE' => $scripturl . '?action=activate;u=' . $row['id_member'],
			'ACTIVATIONCODE' => $row['validation_code'],
			'FORGOTPASSWORDLINK' => $scripturl . '?action=reminder',
		);

		$emaildata = loadEmailTemplate('resend_activate_message', $replacements, empty($row['lngfile']) || empty($modSettings['userLanguage']) ? $language : $row['lngfile']);

		sendmail($row['email_address'], $emaildata['subject'], $emaildata['body'], null, null, false, 0);

		$context['page_title'] = $txt['invalid_activation_resend'];

		// This will ensure we don't actually get an error message if it works!
		$context['error_title'] = '';

		fatal_lang_error(!empty($email_change) ? 'change_email_success' : 'resend_email_success', false);
	}

	// Quit if this code is not right.
	if (empty($_REQUEST['code']) || $row['validation_code'] != $_REQUEST['code'])
	{
		if (!empty($row['is_activated']))
			fatal_lang_error('already_activated', false);
		elseif ($row['validation_code'] == '')
		{
			loadLanguage('Profile');
			fatal_error($txt['registration_not_approved'] . ' <a href="' . $scripturl . '?action=activate;user=' . $row['member_name'] . '">' . $txt['here'] . '</a>.', false);
		}

		$context['sub_template'] = 'retry_activate';
		$context['page_title'] = $txt['invalid_activation_code'];
		$context['member_id'] = $row['id_member'];

		return;
	}

	// Let the integration know that they've been activated!
	call_integration_hook('integrate_activate', array($row['member_name']));

	// Validation complete - update the database!
	updateMemberData($row['id_member'], array('is_activated' => 1, 'validation_code' => ''));

	// Also do a proper member stat re-evaluation.
	updateStats('member', false);

	if (!isset($_POST['new_email']))
	{
		require_once($sourcedir . '/Subs-Post.php');

		adminNotify('activation', $row['id_member'], $row['member_name']);
	}

	$context += array(
		'page_title' => $txt['registration_successful'],
		'sub_template' => 'login',
		'default_username' => $row['member_name'],
		'default_password' => '',
		'never_expire' => false,
		'description' => $txt['activate_success']
	);
}

/**
 * This function will display the contact information for the forum, as well a form to fill in.
 */
function CoppaForm()
{
	global $context, $modSettings, $txt, $smcFunc;

	loadLanguage('Login');
	loadTemplate('Register');

	// No User ID??
	if (!isset($_GET['member']))
		fatal_lang_error('no_access', false);

	// Get the user details...
	$request = $smcFunc['db_query']('', '
		SELECT member_name
		FROM {db_prefix}members
		WHERE id_member = {int:id_member}
			AND is_activated = {int:is_coppa}',
		array(
			'id_member' => (int) $_GET['member'],
			'is_coppa' => 5,
		)
	);
	if ($smcFunc['db_num_rows']($request) == 0)
		fatal_lang_error('no_access', false);
	list ($username) = $smcFunc['db_fetch_row']($request);
	$smcFunc['db_free_result']($request);

	if (isset($_GET['form']))
	{
		// Some simple contact stuff for the forum.
		$context['forum_contacts'] = (!empty($modSettings['coppaPost']) ? $modSettings['coppaPost'] . '<br /><br />' : '') . (!empty($modSettings['coppaFax']) ? $modSettings['coppaFax'] . '<br />' : '');
		$context['forum_contacts'] = !empty($context['forum_contacts']) ? $context['forum_name_html_safe'] . '<br />' . $context['forum_contacts'] : '';

		// Showing template?
		if (!isset($_GET['dl']))
		{
			// Shortcut for producing underlines.
			$context['ul'] = '<u>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u>';
			$context['template_layers'] = array();
			$context['sub_template'] = 'coppa_form';
			$context['page_title'] = $txt['coppa_form_title'];
			$context['coppa_body'] = str_replace(array('{PARENT_NAME}', '{CHILD_NAME}', '{USER_NAME}'), array($context['ul'], $context['ul'], $username), $txt['coppa_form_body']);
		}
		// Downloading.
		else
		{
			// The data.
			$ul = '                ';
			$crlf = "\r\n";
			$data = $context['forum_contacts'] . $crlf . $txt['coppa_form_address'] . ':' . $crlf . $txt['coppa_form_date'] . ':' . $crlf . $crlf . $crlf . $txt['coppa_form_body'];
			$data = str_replace(array('{PARENT_NAME}', '{CHILD_NAME}', '{USER_NAME}', '<br>', '<br />'), array($ul, $ul, $username, $crlf, $crlf), $data);

			// Send the headers.
			header('Connection: close');
			header('Content-Disposition: attachment; filename="approval.txt"');
			header('Content-Type: ' . (isBrowser('ie') || isBrowser('opera') ? 'application/octetstream' : 'application/octet-stream'));
			header('Content-Length: ' . count($data));

			echo $data;
			obExit(false);
		}
	}
	else
	{
		$context += array(
			'page_title' => $txt['coppa_title'],
			'sub_template' => 'coppa',
		);

		$context['coppa'] = array(
			'body' => str_replace('{MINIMUM_AGE}', $modSettings['coppaAge'], $txt['coppa_after_registration']),
			'many_options' => !empty($modSettings['coppaPost']) && !empty($modSettings['coppaFax']),
			'post' => empty($modSettings['coppaPost']) ? '' : $modSettings['coppaPost'],
			'fax' => empty($modSettings['coppaFax']) ? '' : $modSettings['coppaFax'],
			'phone' => empty($modSettings['coppaPhone']) ? '' : str_replace('{PHONE_NUMBER}', $modSettings['coppaPhone'], $txt['coppa_send_by_phone']),
			'id' => $_GET['member'],
		);
	}
}

/**
 * Show the verification code or let it hear.
 */
function VerificationCode()
{
	global $sourcedir, $modSettings, $context, $scripturl;

	$verification_id = isset($_GET['vid']) ? $_GET['vid'] : '';
	$code = $verification_id && isset($_SESSION[$verification_id . '_vv']) ? $_SESSION[$verification_id . '_vv']['code'] : (isset($_SESSION['visual_verification_code']) ? $_SESSION['visual_verification_code'] : '');

	// Somehow no code was generated or the session was lost.
	if (empty($code))
	{
		header('Content-Type: image/gif');
		die("\x47\x49\x46\x38\x39\x61\x01\x00\x01\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x21\xF9\x04\x01\x00\x00\x00\x00\x2C\x00\x00\x00\x00\x01\x00\x01\x00\x00\x02\x02\x44\x01\x00\x3B");
	}

	// Show a window that will play the verification code.
	elseif (isset($_REQUEST['sound']))
	{
		loadLanguage('Login');
		loadTemplate('Register');

		$context['verification_sound_href'] = $scripturl . '?action=verificationcode;rand=' . md5(mt_rand()) . ($verification_id ? ';vid=' . $verification_id : '') . ';format=.wav';
		$context['sub_template'] = 'verification_sound';
		$context['template_layers'] = array();

		obExit();
	}

	// If we have GD, try the nice code.
	elseif (empty($_REQUEST['format']))
	{
		require_once($sourcedir . '/Subs-Graphics.php');

		if (in_array('gd', get_loaded_extensions()) && !showCodeImage($code))
			header('HTTP/1.1 400 Bad Request');

		// Otherwise just show a pre-defined letter.
		elseif (isset($_REQUEST['letter']))
		{
			$_REQUEST['letter'] = (int) $_REQUEST['letter'];
			if ($_REQUEST['letter'] > 0 && $_REQUEST['letter'] <= strlen($code) && !showLetterImage(strtolower($code{$_REQUEST['letter'] - 1})))
			{
				header('Content-Type: image/gif');
				die("\x47\x49\x46\x38\x39\x61\x01\x00\x01\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x21\xF9\x04\x01\x00\x00\x00\x00\x2C\x00\x00\x00\x00\x01\x00\x01\x00\x00\x02\x02\x44\x01\x00\x3B");
			}
		}
		// You must be up to no good.
		else
		{
			header('Content-Type: image/gif');
			die("\x47\x49\x46\x38\x39\x61\x01\x00\x01\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x21\xF9\x04\x01\x00\x00\x00\x00\x2C\x00\x00\x00\x00\x01\x00\x01\x00\x00\x02\x02\x44\x01\x00\x3B");
		}
	}

	elseif ($_REQUEST['format'] === '.wav')
	{
		require_once($sourcedir . '/Subs-Sound.php');

		if (!createWaveFile($code))
			header('HTTP/1.1 400 Bad Request');
	}

	// We all die one day...
	die();
}

/**
 * See if a username already exists.
 */
function RegisterCheckUsername()
{
	global $sourcedir, $smcFunc, $context, $txt;

	// This is XML!
	loadTemplate('Xml');
	$context['sub_template'] = 'check_username';
	$context['checked_username'] = isset($_GET['username']) ? un_htmlspecialchars($_GET['username']) : '';
	$context['valid_username'] = true;

	// Clean it up like mother would.
	$context['checked_username'] = preg_replace('~[\t\n\r\x0B\0' . ($context['utf8'] ? '\x{A0}' : '\xA0') . ']+~' . ($context['utf8'] ? 'u' : ''), ' ', $context['checked_username']);

	require_once($sourcedir . '/Subs-Auth.php');
	$errors = validateUsername(0, $context['checked_username'], true);

	$context['valid_username'] = empty($errors);
}