<?php
namespace entities\evr\security;

class Registrar
{
   public function register()
   {
      $this->set_username();
      $this->set_password();
      $this->set_email_address();
      $this->set_join_flag();
      if ($this->username && $this->password && $this->email)
      {
         if (Security::validate_key())
         {
            $this->add_user();
            Security::remove_key();
            Security::show_success($this->username . " registered");
            return true;
         }
      }
      return false;
   }
   private function set_username()
   {
      $name = Security::get_post_parameter("username");
      if (!$this->check_username_length($name))
      {
         Security::show_error("Please change username length");
         $name = null;
      }
      if (!$this->check_username_content($name))
      {
         Security::show_error("Please use only a-z, A-Z, 0-9, or _");
         $name = null;
      }
      if (Security::find_user_directory($name))
      {
         Security::show_error("Username $name is already taken");
         $name = null;
      }
      $this->username = $name;
   }
   private function check_username_length($name)
   {
      $min = $GLOBALS["USER_NAME_MIN_LENGTH"];
      $max = $GLOBALS["USER_NAME_MAX_LENGTH"];
      return $this->check_length($name, $min, $max);
   }
   private function check_length($string, $min, $max)
   {
      $length = strlen($string);
      return $length >= $min && $length <= $max;
   }
   private function check_username_content($name)
   {
      return preg_match("/^[a-zA-Z0-9_]*$/", $name);
   }
   private function set_password()
   {
      $passwords = Security::get_post_parameter("password");
      $password = $passwords[0];
      if ($passwords[0] != $passwords[1])
      {
         Security::show_error("Two different passwords submitted");
         $password = null;
      }
      if (!$this->check_password_length($passwords[0]))
      {
         Security::show_error("Please change password length");
         $password = null;
      }
      if (!$this->check_password_characters($passwords[0]))
      {
         Security::show_error("Please mix letters and numbers in the password");
         $password = null;
      }
      $this->password = $password;
   }
   private function check_password_length($password)
   {
      $min = $GLOBALS["PASSWORD_MIN_LENGTH"];
      $max = $GLOBALS["PASSWORD_MAX_LENGTH"];
      return $this->check_length($password, $min, $max);
   }
   private function check_password_characters($password)
   {
      $chars = "/[a-zA-Z]/";
      $numerals = "/[0-9]/";
      return preg_match($chars, $password) && preg_match($numerals, $password);
   }
   private function set_email_address()
   {
      $email = Security::get_post_parameter("email_address");
      if (!preg_match("/.+@.+\..+/", $email))
      {
         Security::show_error("Please use a different e-mail address format");
         $email = null;
      }
      $this->email = $email;
   }
   private function set_join_flag()
   {
      if (Security::get_post_parameter("join"))
      {
         $this->join = "1";
      }
      else
      {
         $this->join = "0";
      }
   }
   private function add_user()
   {
      $this->create_user_directory();
      $this->store_password();
      $this->store_email_address();
      $this->create_addresses_file();
      $this->create_history_file();
      $this->create_expert_file();
      $this->initialize_progress_file();
   }
   private function create_user_directory()
   {
      $saved = umask(0);
      mkdir($this->get_user_path(), 0770);
      umask($saved);
   }
   private function store_password()
   {
      $hash = $this->hash_password();
      $path = $this->create_file($GLOBALS["USER_HASH_PATH"]);
      file_put_contents($path, $hash . "\n");
   }
   private function create_file($name)
   {
      $path = $this->get_user_path() . $name;
      touch($path);
      chmod($path, octdec($GLOBALS["USER_FILE_PERMISSIONS"]));
      return $path;
   }
   private function get_user_path()
   {
      return $GLOBALS["USERS_PATH"] . "/" . $this->username . "/";
   }
   private function hash_password()
   {
      $salt = $this->generate_salt();
      return crypt($this->password, $salt);
   }
   private function generate_salt()
   {
      return chr(rand(65, 90)) . rand(0, 9);
   }
   private function store_email_address()
   {
      $content = $this->email . " " . $this->join . "\n";
      $path = $this->create_file($GLOBALS["USER_EMAIL_ADDRESS_PATH"]);
      file_put_contents($path, $content);
   }
   private function create_addresses_file()
   {
      $this->create_file($GLOBALS["USER_ADDRESSES_PATH"]);
   }
   private function create_history_file()
   {
      $this->create_file($GLOBALS["USER_HISTORY_PATH"]);
   }
   private function create_expert_file()
   {
      $this->create_file($GLOBALS["USER_EXPERT_PROGRESS_PATH"]);
   }
   private function initialize_progress_file()
   {
      $path = $this->create_file($GLOBALS["USER_PROGRESS_PATH"]);
      file_put_contents($path, "0\n");
   }
   public function change_password()
   {
      $this->username = Security::get_post_parameter("username");
      $password = Security::get_post_parameter("old_password");
      if (Security::verify_credentials($this->username, $password))
      {
         $this->set_password();
         if ($this->password)
         {
            $this->store_password();
            Security::show_success("password changed");
            return true;
         }
      }
      return false;
   }
   public function reset_password()
   {
      $this->username = Security::get_post_parameter("username");
      $this->password = $this->generate_password();
      if (Security::find_user_directory($this->username))
      {
         $this->store_password();
         return $this->send_password($this->password);
      }
      Security::show_error("Username not found");
      return false;
   }
   private function generate_password()
   {
      $length = $GLOBALS["GENERATED_PASSWORD_LENGTH"];
      $set = $this->generate_character_set();
      $password = "";
      for ($ii = 0; $ii < $length; $ii++)
      {
         $password .= $set[rand(0, strlen($set) - 1)];
      }
      return $password;
   }
   private function generate_character_set()
   {
      $set = "";
      for ($ii = 0; $ii <= 90 - 65; $ii++)
      {
         $set .= chr($ii + 65);
      }
      for ($ii = 0; $ii <= 122 - 97; $ii++)
      {
         $set .= chr($ii + 97);
      }
      for ($ii = 0; $ii <= 9; $ii++)
      {
         $set .= $ii;
      }
      return $set;
   }
   private function send_password($password)
   {
      $email_address = $this->get_email_address();
      $mail = new Password_Mail($email_address, $password);
      if ($mail->send())
      {
         Security::show_success("New password emailed");
         return true;
      }
      Security::show_error("Mail delivery failed");
      return false;
   }
   private function get_email_address()
   {
      $path = $this->get_user_path() . $GLOBALS["USER_EMAIL_ADDRESS_PATH"];
      $fields = explode(" ", file_get_contents($path, FILE_IGNORE_NEW_LINES));
      return $fields[0];
   }
}
3.238.70.175
3.238.70.175
3.238.70.175
 
August 12, 2013

I've been researching tartan/plaid recently for decoration in my updated version of Ball & Cup, now called Send. I want to create the atmosphere of a sports event, so I plan on drawing tartan patterns at the vertical edges of the screen as backgrounds for areas where spectator ants generate based on player performance. I figured I would make my own patterns, but after browsing tartans available in the official register, I decided to use existing ones instead.

I made a list of the tartans that had what I thought were interesting titles and chose 30 to base the game's levels on. I sequenced them, using their titles to form a loose narrative related to the concept of sending. Here are three tartans in the sequence (levels 6, 7 and 8) generated by an algorithm I inferred by looking at examples that reads a tartan specification and draws its pattern using a simple dithering technique to blend the color stripes.


Acadia


Eve


Spice Apple

It would be wasting an opportunity if I didn't animate the tartans, so I'm thinking about animations for them. One effect I want to try is making them look like water washing over the area where the ants are spectating. I've also recorded some music for the game. Here are the loops for the game over and high scores screens.

Game Over

High Scores