<?php
/*
	Question2Answer by Gideon Greenspan and contributors
	http://www.question2answer.org/

	File: qa-include/qa-page-register.php
	Description: Controller for register page


	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	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 General Public License for more details.

	More about this license: http://www.question2answer.org/license.php
*/

	if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
		header('Location: ../');
		exit;
	}

	require_once QA_INCLUDE_DIR.'app/captcha.php';
	require_once QA_INCLUDE_DIR.'db/users.php';


//	Check we're not using single-sign on integration, that we're not logged in, and we're not blocked

	if (QA_FINAL_EXTERNAL_USERS)
		qa_fatal_error('User registration is handled by external code');

	if (qa_is_logged_in())
		qa_redirect('');


//	Get information about possible additional fields

	$show_terms = qa_opt('show_register_terms');

	$userfields = qa_db_select_with_pending(
		qa_db_userfields_selectspec()
	);

	foreach ($userfields as $index => $userfield) {
		if (!($userfield['flags'] & QA_FIELD_FLAGS_ON_REGISTER))
			unset($userfields[$index]);
	}


//	Check we haven't suspended registration, and this IP isn't blocked

	if (qa_opt('suspend_register_users')) {
		$qa_content = qa_content_prepare();
		$qa_content['error'] = qa_lang_html('users/register_suspended');
		return $qa_content;
	}

	if (qa_user_permit_error()) {
		$qa_content = qa_content_prepare();
		$qa_content['error'] = qa_lang_html('users/no_permission');
		return $qa_content;
	}


//	Process submitted form

	if (qa_clicked('doregister')) {
		require_once QA_INCLUDE_DIR.'app/limits.php';

		if (qa_user_limits_remaining(QA_LIMIT_REGISTRATIONS)) {
			require_once QA_INCLUDE_DIR.'app/users-edit.php';

			$inemail = qa_post_text('email');
			$inpassword = qa_post_text('password');
			$inhandle = qa_post_text('handle');
			$interms = (int) qa_post_text('terms');

			$inprofile = array();
			foreach ($userfields as $userfield)
				$inprofile[$userfield['fieldid']] = qa_post_text('field_'.$userfield['fieldid']);

			if (!qa_check_form_security_code('register', qa_post_text('code'))) {
				$pageerror = qa_lang_html('misc/form_security_again');
			}
			else {
				// core validation
				$errors = array_merge(
					qa_handle_email_filter($inhandle, $inemail),
					qa_password_validate($inpassword)
				);

				// T&Cs validation
				if ($show_terms && !$interms)
					$errors['terms'] = qa_lang_html('users/terms_not_accepted');

				// filter module validation
				if (count($inprofile)) {
					$filtermodules = qa_load_modules_with('filter', 'filter_profile');
					foreach ($filtermodules as $filtermodule)
						$filtermodule->filter_profile($inprofile, $errors, null, null);
				}

				if (qa_opt('captcha_on_register'))
					qa_captcha_validate_post($errors);

				if (empty($errors)) {
					// register and redirect
					qa_limits_increment(null, QA_LIMIT_REGISTRATIONS);

					$userid = qa_create_new_user($inemail, $inpassword, $inhandle);

					foreach ($userfields as $userfield)
						qa_db_user_profile_set($userid, $userfield['title'], $inprofile[$userfield['fieldid']]);

					qa_set_logged_in_user($userid, $inhandle);

					$topath = qa_get('to');

					if (isset($topath))
						qa_redirect_raw(qa_path_to_root().$topath); // path already provided as URL fragment
					else
						qa_redirect('');
				}
			}

		}
		else
			$pageerror = qa_lang('users/register_limit');
	}


//	Prepare content for theme

	$qa_content = qa_content_prepare();

	$qa_content['title'] = qa_lang_html('users/register_title');

	$qa_content['error'] = @$pageerror;

	$qa_content['form'] = array(
		'tags' => 'method="post" action="'.qa_self_html().'"',

		'style' => 'tall',

		'fields' => array(
			'handle' => array(
				'label' => qa_lang_html('users/handle_label'),
				'tags' => 'name="handle" id="handle" dir="auto"',
				'value' => qa_html(@$inhandle),
				'error' => qa_html(@$errors['handle']),
			),

			'password' => array(
				'type' => 'password',
				'label' => qa_lang_html('users/password_label'),
				'tags' => 'name="password" id="password" dir="auto"',
				'value' => qa_html(@$inpassword),
				'error' => qa_html(@$errors['password']),
			),

			'email' => array(
				'label' => qa_lang_html('users/email_label'),
				'tags' => 'name="email" id="email" dir="auto"',
				'value' => qa_html(@$inemail),
				'note' => qa_opt('email_privacy'),
				'error' => qa_html(@$errors['email']),
			),
		),

		'buttons' => array(
			'register' => array(
				'tags' => 'onclick="qa_show_waiting_after(this, false);"',
				'label' => qa_lang_html('users/register_button'),
			),
		),

		'hidden' => array(
			'doregister' => '1',
			'code' => qa_get_form_security_code('register'),
		),
	);

	// prepend custom message
	$custom = qa_opt('show_custom_register') ? trim(qa_opt('custom_register')) : '';
	if (strlen($custom)) {
		array_unshift($qa_content['form']['fields'], array(
			'type' => 'custom',
			'note' => $custom,
		));
	}

	foreach ($userfields as $userfield) {
		$value = @$inprofile[$userfield['fieldid']];

		$label = trim(qa_user_userfield_label($userfield), ':');
		if (strlen($label))
			$label .= ':';

		$qa_content['form']['fields'][$userfield['title']] = array(
			'label' => qa_html($label),
			'tags' => 'name="field_'.$userfield['fieldid'].'"',
			'value' => qa_html($value),
			'error' => qa_html(@$errors[$userfield['fieldid']]),
			'rows' => ($userfield['flags'] & QA_FIELD_FLAGS_MULTI_LINE) ? 8 : null,
		);
	}

	if (qa_opt('captcha_on_register'))
		qa_set_up_captcha_field($qa_content, $qa_content['form']['fields'], @$errors);

	// show T&Cs checkbox
	if ($show_terms) {
		$qa_content['form']['fields']['terms'] = array(
			'type' => 'checkbox',
			'label' => trim(qa_opt('register_terms')),
			'tags' => 'name="terms" id="terms"',
			'value' => qa_html(@$interms),
			'error' => qa_html(@$errors['terms']),
		);
	}

	$loginmodules = qa_load_modules_with('login', 'login_html');

	foreach ($loginmodules as $module) {
		ob_start();
		$module->login_html(qa_opt('site_url').qa_get('to'), 'register');
		$html = ob_get_clean();

		if (strlen($html))
			@$qa_content['custom'] .= '<br>'.$html.'<br>';
	}

	// prioritize 'handle' for keyboard focus
	$qa_content['focusid'] = isset($errors['handle']) ? 'handle'
		: (isset($errors['password']) ? 'password'
			: (isset($errors['email']) ? 'email' : 'handle'));


	return $qa_content;


/*
	Omit PHP closing tag to help avoid accidental output
*/