<?php

	require_once APP_PATH . '_lib/class.CityDAO.php';

	

	class CitiesPage

	{

		private $template = '';

		private $smarty;

		

		private $cityDAO;

		

		public function __construct()

		{

			$this->cityDAO = CityDAO::getInstance();	

		}

			

		public function processRequest($action, $cityID, $smarty)

		{

			$this->smarty = $smarty;

			

			$this->smarty->assign('current_category', 'cities');

			

			switch ($action)

			{

				case '':

					

					$this->prepareDisplayCities();

					break;

					

				case 'prepare-add':

					

					$city = array('name' => '', 'ascii_name' => '');

					

					$this->smarty->assign('action', 'add');

					$this->smarty->assign('city', $city);

					

					$this->template = 'city_edit.tpl';

					

					break;

					

				case 'add':

					

					escape($_POST);

					

					$errors = array();

					

					if (isset($GLOBALS['name']) && isset($GLOBALS['ascii_name']))

					{

						$name = trim($GLOBALS['name']);

						$asciiName = trim($GLOBALS['ascii_name']);

						

						$this->validateCity($name, $asciiName, $errors);

						

						if (count($errors) == 0)

						{

							$cityByAsciiName = $this->getCityByAsciiName($asciiName);

							

							if ($cityByAsciiName)

								$errors['asciiName'] = 'Ascii name not unique';

							else

							{

								$this->createCity($name, $asciiName);

								

								$this->prepareDisplayCities();

							}

						}

						

						// there are errors

						if (count($errors))

						{

							$city['name'] = $_POST['name'];

							$city['ascii_name'] = $_POST['ascii_name'];

							

							$this->smarty->assign('action', 'add');

							$this->smarty->assign('city', $city);

							$this->smarty->assign('errors', $errors);

							

							$this->template = 'city_edit.tpl';

						}

					}

					else

						$this->prepareDisplayCities();

					

					break;

					

				case 'prepare-edit':

					

					if (isset($cityID) && $cityID != '')

					{

						$city = $this->getCityByID($cityID);

						

						if ($city)

						{

							$this->smarty->assign('action', 'edit');

							$this->smarty->assign('city', $city);

							

							$this->template = 'city_edit.tpl';

						}

						else

							$this->prepareDisplayCities();

					}

					else

						$this->prepareDisplayCities();

						

					break;

					

				case 'edit':

					

					escape($_POST);

					

					$errors = array();

					

					if (isset($GLOBALS['name']) && isset($GLOBALS['ascii_name']))

					{

						$name = trim($GLOBALS['name']);

						$asciiName = trim($GLOBALS['ascii_name']);

						

						$cityID = $GLOBALS['id'];

						$city = $this->getCityByID($cityID);	

						

						$this->validateCity($name, $asciiName, $errors);

						

						if (count($errors) == 0)

						{

							// if the user has changed the ascii name

							if (strcasecmp($city['ascii_name'], $asciiName))

							{

								$cityByAsciiName = $this->getCityByAsciiName($asciiName);

								

								if ($cityByAsciiName)

									$errors['asciiName'] = 'Ascii name not unique';

							}

							

							if (count($errors) == 0)

							{

								$city['name'] = $name;

								$city['ascii_name'] = $asciiName;

								

								$this->updateCity($city);

								

								$this->prepareDisplayCities();

							}

						}

						

						// there are errors

						if (count($errors))

						{

							$city['name'] = $_POST['name'];

							$city['ascii_name'] = $_POST['ascii_name'];

							

							$this->smarty->assign('action', 'edit');

							$this->smarty->assign('city', $city);

							$this->smarty->assign('errors', $errors);

							

							$this->template = 'city_edit.tpl';

						}

					}

					else

						$this->prepareDisplayCities();

					

					break;

					

				case 'delete':

					if (isset($_POST['cityID']))

					{

						$cityID = $_POST['cityID'];

						

						$city = $this->getCityByID($cityID);

						

						if ($city)

						{

							$this->updateJobsForCityDeletion($city);

							

							$this->deleteCity($city);

							

							echo 1;

						}

						else

							echo 0;

						

						exit;

					}

					else

						$this->prepareDisplayCities();

						

					break;

					

				case 'list': ; // do nothing, just fall through 

				default:

					$this->prepareDisplayCities();

			}

			

			return $this->template;

		}

		

		private function getCityByID($cityID)

		{

			return $this->cityDAO->getCityByID($cityID);

		}

		

		private function prepareAddCity()

		{

			$city = array('name' => '', 'ascii_name' => '');

					

			$this->smarty->assign('action', 'add');

			$this->smarty->assign('city', $city);

		}

		

		private function prepareDisplayCities()

		{

			$cities = $this->getCities();

				

			$this->smarty->assign('cities', $cities);

								

			$this->template = 'cities.tpl';

		}

		

		private function getCities()

		{

			return $this->cityDAO->getCities();

		}

		

		private function getCityByAsciiName($asciiName)

		{

			return $this->cityDAO->getCityByAsciiName($asciiName);

		}

		

		private function updateCity($city)

		{

			$this->cityDAO->updateCity($city);

		}

		

		/**

		 * Validates the name and asciiName and puts the error messages (if any)

		 * in the $errors array.

		 * @param $name

		 * @param $asciiName

		 * @param $errors

		 * @return void

		 */

		private function validateCity($name, $asciiName, &$errors)

		{

			if ($name == '')

				$errors['name'] = 'City name';

			

			if ($asciiName == '')

				$errors['asciiName'] = 'Ascii name';

			else

				if (preg_match('/([^a-z0-9\-_]+?)/i', $asciiName))

					$errors['asciiName'] = 'Ascii name must contain only alphanumerical characters, dashes and underscores';

		}

		

		private function createCity($name, $asciiName)

		{

			$city = array('name' => $name, 'ascii_name' => $asciiName);

			

			$this->cityDAO->insertCity($city);

		}

		

		private function updateJobsForCityDeletion($city)

		{

			global $db;

			

			$query = 'UPDATE '.DB_PREFIX.'jobs SET

					  city_id = NULL,

					  outside_location = "'. $db->real_escape_string($city['name']) .'" 

					  WHERE 

					  city_id = ' . $city['id'];

			

			$db->query($query);

		}

		

		private function deleteCity($city)

		{

			$this->cityDAO->deleteCity($city);

		}

	}

?>