<?php

/**
 * plugin_email
 *
 * @method email time based one time password authenticate the user
 */
class plugin_email {

	/**
	 * Define variables and their scope
	 */
	public $domain_name;
	public $domain_uuid;
	public $username;
	public $password;
	public $user_uuid;
	public $user_email;
	public $contact_uuid;
	public $debug;

	/**
	 * time based one time password with email
	 * @return array [authorized] => true or false
	 */
	function email() {

			//pre-process some settings
			$settings['theme']['favicon'] = !empty($_SESSION['theme']['favicon']['text']) ? $_SESSION['theme']['favicon']['text'] : PROJECT_PATH.'/themes/default/favicon.ico';
			$settings['login']['destination'] = !empty($_SESSION['login']['destination']['text']) ? $_SESSION['login']['destination']['text'] : '';
			$settings['users']['unique'] = !empty($_SESSION['users']['unique']['text']) ? $_SESSION['users']['unique']['text'] : '';
			$settings['theme']['logo'] = !empty($_SESSION['theme']['logo']['text']) ? $_SESSION['theme']['logo']['text'] : PROJECT_PATH.'/themes/default/images/logo_login.png';
			$settings['theme']['login_logo_width'] = !empty($_SESSION['theme']['login_logo_width']['text']) ? $_SESSION['theme']['login_logo_width']['text'] : 'auto; max-width: 300px';
			$settings['theme']['login_logo_height'] = !empty($_SESSION['theme']['login_logo_height']['text']) ? $_SESSION['theme']['login_logo_height']['text'] : 'auto; max-height: 300px';

			//set a default template
			$_SESSION['domain']['template']['name'] = 'default';
			$_SESSION['theme']['menu_brand_image']['text'] = PROJECT_PATH.'/themes/default/images/logo.png';
			$_SESSION['theme']['menu_brand_type']['text'] = 'image';

			//get the domain
			$domain_array = explode(":", $_SERVER["HTTP_HOST"]);
			$domain_name = $domain_array[0];

			//temp directory
			$_SESSION['server']['temp']['dir'] = '/tmp';

			//use the session username
			if (isset($_SESSION['username'])) {
				$_POST['username'] = $_SESSION['username'];
				$_REQUEST['username'] = $_SESSION['username'];
			}

		//request the username
			if (!isset($_POST['username']) && !isset($_POST['authentication_code'])) {

				//add multi-lingual support
				$language = new text;
				$text = $language->get(null, '/core/authentication');

				//initialize a template object
				$view = new template();
				$view->engine = 'smarty';
				$view->template_dir = $_SERVER["DOCUMENT_ROOT"].PROJECT_PATH.'/core/authentication/resources/views/';
				$view->cache_dir = $_SESSION['server']['temp']['dir'];
				$view->init();

				//assign default values to the template
				$view->assign("project_path", PROJECT_PATH);
				$view->assign("login_destination_url", $settings['login']['destination']);
				$view->assign("favicon", $settings['theme']['favicon']);
				$view->assign("login_title", $text['label-username']);
				$view->assign("login_username", $text['label-username']);
				$view->assign("login_logo_width", $settings['theme']['login_logo_width']);
				$view->assign("login_logo_height", $settings['theme']['login_logo_height']);
				$view->assign("login_logo_source", $settings['theme']['logo']);
				$view->assign("button_login", $text['button-login']);

				//show the views
				$content = $view->render('username.htm');
				echo $content;
				exit;

			}

		//show the authentication code view
			if (!isset($_POST['authentication_code'])) {

				//get the username
				//if (!isset($this->username) && isset($_REQUEST['username'])) {
				//	$this->username = $_REQUEST['username'];
				//}

				//get the user details
				$sql = "select user_uuid, username, user_email, contact_uuid \n";
				$sql .= "from v_users\n";
				$sql .= "where (\n";
				$sql .= "	username = :username\n";
				$sql .= "	or user_email = :username\n";
				$sql .= ")\n";
				if ($settings['users']['unique'] != "global") {
					//unique username per domain (not globally unique across system - example: email address)
					$sql .= "and domain_uuid = :domain_uuid ";
					$parameters['domain_uuid'] = $_SESSION["domain_uuid"];
				}
				$parameters['username'] = $_REQUEST['username'];
				$database = new database;
				$row = $database->select($sql, $parameters, 'row');
				unset($parameters);

				//set class variables
				//if (!empty($row["user_email"])) {
				//	$this->user_uuid = $row['user_uuid'];
				//	$this->user_email = $row['user_email'];
				//	$this->contact_uuid = $row['contact_uuid'];
				//}

				//set a few session variables
				$_SESSION["user_uuid"] = $row['user_uuid'];
				$_SESSION["username"] = $row['username'];
				$_SESSION["user_email"] = $row['user_email'];
				$_SESSION["contact_uuid"] = $row["contact_uuid"];

				//user email not found
				if (empty($row["user_email"])) {
					//build the result array
					$result["plugin"] = "email";
					$result["domain_name"] = $_SESSION["domain_name"];
					$result["username"] = $_REQUEST['username'];
					$result["user_uuid"] = $_SESSION["user_uuid"];
					$result["domain_uuid"] = $_SESSION["domain_uuid"];
					$result["contact_uuid"] = $_SESSION["contact_uuid"];
					$result["authorized"] = false;

					//add the failed login to user logs
					user_logs::add($result);

					//return the array
					return $result;
				}

				//authentication code
				$_SESSION["user"]["authentication"]["email"]["code"] = generate_password(6, 1);
				$_SESSION["user"]["authentication"]["email"]["epoch"] = time();

				////$_SESSION["authentication_address"] = $_SERVER['REMOTE_ADDR'];
				////$_SESSION["authentication_date"] = 'now()';

				//set the authentication code
				//$sql = "update v_users \n";
				//$sql .= "set auth_code = :auth_code \n";
				//$sql .= "where user_uuid = :user_uuid;";
				//$parameters['auth_code'] = $auth_code_hash;
				//$parameters['user_uuid'] = $this->user_uuid;
				//$database->execute($sql, $parameters);
				//unset($sql);

				//email settings
				//$email_address = $this->user_email;
				//$email_subject = 'Validation Code';
				//$email_body = 'Validation Code: '.$authentication_code;

				//send email with the authentication_code
				//ob_start();
				//$sent = !send_email($email_address, $email_subject, $email_body, $email_error, null, null, 3, 3) ? false : true;
				//$response = ob_get_clean();

				//get the language code
				$language_code = $_SESSION['domain']['language']['code'];
			
				//get the email template from the database
				$sql = "select template_subject, template_body ";
				$sql .= "from v_email_templates ";
				$sql .= "where (domain_uuid = :domain_uuid or domain_uuid is null) ";
				$sql .= "and template_language = :template_language ";
				$sql .= "and template_category = :template_category ";
				$sql .= "and template_subcategory = :template_subcategory ";
				$sql .= "and template_type = :template_type ";
				$sql .= "and template_enabled = 'true' ";
				$parameters['domain_uuid'] = $_SESSION["domain_uuid"];
				$parameters['template_language'] = $language_code;
				$parameters['template_category'] = 'authentication';
				$parameters['template_subcategory'] = 'email';
				$parameters['template_type'] = 'html';
				$database = new database;
				$row = $database->select($sql, $parameters, 'row');
				$email_subject = $row['template_subject'];
				$email_body = $row['template_body'];
				unset($sql, $parameters, $row);

				//replace variables in email subject
				$email_subject = str_replace('${domain_name}', $_SESSION["domain_name"], $email_subject);

				//replace variables in email body
				$email_body = str_replace('${domain_name}', $_SESSION["domain_name"], $email_body);
				$email_body = str_replace('${auth_code}', $_SESSION["user"]["authentication"]["email"]["code"], $email_body);

				//get the email from name and address
				$email_from_address = $_SESSION['email']['smtp_from']['text'];
				$email_from_name = $_SESSION['email']['smtp_from_name']['text'];

				//send email - direct
				$email = new email;
				$email->recipients = $_SESSION["user_email"];
				$email->subject = $email_subject;
				$email->body = $email_body;
				$email->from_address = $email_from_address;
				$email->from_name = $email_from_name;
				//$email->attachments = $email_attachments;
				$email->debug_level = 0;
				$email->method = 'direct';
				$sent = $email->send();

				//debug informations
				//$email_response = $email->response;
				//$email_error = $email->email_error;
				//echo $email_response."<br />\n";
				//echo $email_error."<br />\n";

				//set a default template
				$_SESSION['domain']['template']['name'] = 'default';
				$_SESSION['theme']['menu_brand_image']['text'] = PROJECT_PATH.'/themes/default/images/logo.png';
				$_SESSION['theme']['menu_brand_type']['text'] = 'image';

				//get the domain
				$domain_array = explode(":", $_SERVER["HTTP_HOST"]);
				$domain_name = $domain_array[0];

				//temp directory
				$_SESSION['server']['temp']['dir'] = '/tmp';

				//create token
				//$object = new token;
				//$token = $object->create('login');

				//add multi-lingual support
				$language = new text;
				$text = $language->get(null, '/core/authentication');

				//initialize a template object
				$view = new template();
				$view->engine = 'smarty';
				$view->template_dir = $_SERVER["DOCUMENT_ROOT"].PROJECT_PATH.'/core/authentication/resources/views/';
				$view->cache_dir = $_SESSION['server']['temp']['dir'];
				$view->init();

				//assign default values to the template
				$view->assign("project_path", PROJECT_PATH);
				$view->assign("login_destination_url", $settings['login']['destination']);
				$view->assign("favicon", $settings['theme']['favicon']);
				$view->assign("login_title", $text['label-verify']);
				$view->assign("login_email_description", $text['label-email_description']);
				$view->assign("login_authentication_code", $text['label-authentication_code']);
				$view->assign("login_logo_width", $settings['theme']['login_logo_width']);
				$view->assign("login_logo_height", $settings['theme']['login_logo_height']);
				$view->assign("login_logo_source", $settings['theme']['logo']);
				$view->assign("button_verify", $text['label-verify']);

				//debug information
				//echo "<pre>\n";
				//print_r($text);
				//echo "</pre>\n";

				//show the views
				$content = $view->render('email.htm');
				echo $content;
				exit;
			}

		//if authorized then verify
			if (isset($_POST['authentication_code'])) {

				//check if the authentication code has expired. if expired return false
				if ($_SESSION["user"]["authentication"]["email"]["epoch"] + 3 > time()) {
					//authentication code expired
					$result["plugin"] = "email";
					$result["domain_name"] = $_SESSION["domain_name"];
					$result["username"] = $_SESSION["username"];
					$result["error_message"] = 'code expired';
					$result["authorized"] = false;
					print_r($result);
					return $result;
					exit;
				}

				//get the user details
				$sql = "select user_uuid, user_email, contact_uuid, user_email_secret\n";
				$sql .= "from v_users\n";
				$sql .= "where (\n";
				$sql .= "	username = :username\n";
				$sql .= "	or user_email = :username\n";
				$sql .= ")\n";
				if ($settings['users']['unique'] != "global") {
					//unique username per domain (not globally unique across system - example: email address)
					$sql .= "and domain_uuid = :domain_uuid ";
					$parameters['domain_uuid'] = $_SESSION["domain_uuid"];
				}
				$parameters['username'] = $_SESSION["username"];
				$database = new database;
				$row = $database->select($sql, $parameters, 'row');
				$this->user_uuid = $row['user_uuid'];
				$this->user_email = $row['user_email'];
				$this->contact_uuid = $row['contact_uuid'];
				$this->user_email_secret = $row['user_email_secret'];
				unset($parameters);

				//validate the code
				if ($_SESSION["user"]["authentication"]["email"]["code"] === $_POST['authentication_code']) {
					$auth_valid = true;
				}
				else {
					$auth_valid = false;
				}

				//get the user details
				if ($auth_valid) {
					//get user data from the database
					$sql = "select user_uuid, username, user_email, contact_uuid from v_users ";
					$sql .= "where user_uuid = :user_uuid ";
					if ($settings['users']['unique'] != "global") {
						//unique username per domain (not globally unique across system - example: email address)
						$sql .= "and domain_uuid = :domain_uuid ";
						$parameters['domain_uuid'] = $_SESSION["domain_uuid"];
					}
					$parameters['user_uuid'] = $_SESSION["user_uuid"];
					$database = new database;
					$row = $database->select($sql, $parameters, 'row');
					//view_array($row);
					unset($parameters);

					//set a few session variables
					//$_SESSION["username"] = $row['username']; //setting the username makes it skip the rest of the authentication
					//$_SESSION["user_email"] = $row['user_email'];
					//$_SESSION["contact_uuid"] = $row["contact_uuid"];
				}
				else {
					//destroy session
					session_unset();
					session_destroy();
					//$_SESSION['authentication']['plugin']
					//send http 403
					header('HTTP/1.0 403 Forbidden', true, 403);

					//redirect to the root of the website
					header("Location: ".PROJECT_PATH."/");

					//exit the code
					exit();
				}

				/*
				//check if user successfully logged in during the interval
					//$sql = "select user_log_uuid, timestamp, user_name, user_agent, remote_address ";
					$sql = "select count(*) as count ";
					$sql .= "from v_user_logs ";
					$sql .= "where domain_uuid = :domain_uuid ";
					$sql .= "and user_uuid = :user_uuid ";
					$sql .= "and user_agent = :user_agent ";
					$sql .= "and type = 'login' ";
					$sql .= "and result = 'success' ";
					$sql .= "and floor(extract(epoch from now()) - extract(epoch from timestamp)) > 3 ";
					$sql .= "and floor(extract(epoch from now()) - extract(epoch from timestamp)) < 300 ";
					$parameters['domain_uuid'] = $this->domain_uuid;
					$parameters['user_uuid'] = $this->user_uuid;
					$parameters['user_agent'] = $_SERVER['HTTP_USER_AGENT'];
					$database = new database;
					$user_log_count = $database->select($sql, $parameters, 'all');
					//view_array($user_log_count);
					unset($sql, $parameters);
				*/

				//result array
				$result["plugin"] = "email";
				$result["domain_name"] = $_SESSION["domain_name"];
				$result["username"] = $_SESSION["username"];
				$result["user_uuid"] = $_SESSION["user_uuid"];
				$result["domain_uuid"] = $_SESSION["domain_uuid"];
				$result["contact_uuid"] = $_SESSION["contact_uuid"];
				$result["authorized"] = $auth_valid ? true : false;
				return $result;

				//$_SESSION['authentication']['plugin']['email']['plugin'] = "email";
				//$_SESSION['authentication']['plugin']['email']['domain_name'] = $_SESSION["domain_name"];
				//$_SESSION['authentication']['plugin']['email']['username'] = $row['username'];
				//$_SESSION['authentication']['plugin']['email']['user_uuid'] = $_SESSION["user_uuid"];
				//$_SESSION['authentication']['plugin']['email']['contact_uuid'] = $_SESSION["contact_uuid"];
				//$_SESSION['authentication']['plugin']['email']['domain_uuid'] =  $_SESSION["domain_uuid"];
				//$_SESSION['authentication']['plugin']['email']['authorized'] = $auth_valid ? true : false;
			}

	}
}

?>
