<?php

	class Register {

		private $username, $email, $pasword, $re_password;
		private $connection;
		private $error;

		function __construct($username, $email, $password, $re_password) {

			try {

				$this->connection = new PDO("mysql:host=localhost; dbname=test", "root", "");
				$this->connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

			} catch (Exception $e) {

				die("Error: " . $e->getMessage());

			}

			$this->username = $username;

			$this->email = $email;

			$this->password = md5($password);

			$this->re_password = md5($re_password);

			if(!$this->validate_username() || !$this->validate_email() || !$this->validate_password()) {

				echo $this->error;

			}else {

				try {

					$sql = "INSERT INTO users (username, email, password) VALUES (:username, :email, :password)";

					$result = $this->connection->prepare($sql);

					$result->bindValue(":username", $this->username);
					$result->bindValue(":email", $this->email);
					$result->bindValue(":password", $this->password);

					$result->execute();

				} catch (Exception $e) {

					die("Error: ".$e->getMessage());

				}

			}

		}

		private function validate_username() {

			try {

				$sql = "SELECT username FROM users WHERE username = :username";

				$result = $this->connection->prepare($sql);

				$result->bindValue(":username", $this->username);

				$result->execute();

				if($result->rowCount() > 0) {

					$this->error ="El username introducido ya existe.";
					return false;

				}else {

					return true;

				}

			} catch (Exception $e) {

				die("Error: ".$e->getMessage());

			}

		}

		private function validate_email() {

			if (!preg_match('/^[A-Za-z0-9-_.+%]+@[A-Za-z0-9-.]+\.[A-Za-z]{2,4}$/', $this->email)) {

				$this->error = "El email debe tener la siguiente estructura:  name@domain.sub";
				return false;

			}else {

				try {

					$sql = "SELECT email FROM users WHERE email = :email";

					$result = $this->connection->prepare($sql);

					$result->bindValue(":email", $this->email);

					$result->execute();

					if($result->rowCount() > 0) {

						$this->error = "El email introducido ya existe.";
						return false;

					}else {

						return true;

					}

				} catch (Exception $e) {

					die("Error: ".$e->getMessage());

				}

			}

		}

		private function validate_password() {

			if($this->password != $this->re_password) {

				$this->error = "Passwords don't match.";
				return false;

			}else {

				return true;

			}

		}

	}

	//$register = new Register("usern2ame", "email@domain2.sub", "password", "password");

?>