<?php/** * Creates an SQL 'Create Table' based upon an entity * @author Chris Tankersley <chris@ctankersley.com> * @copyright 2010 Chris Tankersley * @package PhpORM_Cli */class PhpORM_Cli_GenerateSql{  /**   * Use a MySQL database   */  const MYSQL = 'mysql';  /**   * Use a SQLite database   */  const SQLITE = 'sqlite';  /**   * Types that are allowed to have a length   * @var array   */  protected $_hasLength = array('integer', 'varchar');  /**   * Regexes needed to pull out the different comments   * @var array   */  protected $_regexes = array(    'type' => '/ type=([a-z_]*) /',    'length' => '/ length=([0-9]*) /',    'default' => '/ default="(.*)" /',    'null' => '/ null /',  );  /**   * Types that we support   * @var array   */  protected $_validTypes = array(    'boolean' => 'BOOL',    'date' => 'DATE',    'integer' => 'INT',    'primary_autoincrement' => 'INT AUTO_INCREMENT PRIMARY KEY',    'text' => 'TEXT',    'timestamp' => 'TIMESTAMP',    'varchar' => 'VARCHAR',  );  /**   * Name of the class we will interperet   * @var string   */  protected $_className;  /**   * Name of the table we are generating   * @var string   */  protected $_tableName;  /**   * The type of database we are generating   * @var string   */  protected $_type;  /**   * Sets the name of the class we are working with   * @param string $class   * @param string $table_name   * @param string $type   */  public function __construct($class, $table_name, $type = self::MYSQL)  {    $this->_className = $class;    $this->_tableName = $table_name;    $this->_type = $type;  }  /**   * Builds an SQL Line for a property   * @param ReflectionProperty $property   * @return string   */  protected function _getDefinition($property)  {    $type = '';    $length = '';    $null = '';    preg_match($this->_regexes['type'], $property->getDocComment(), $matches);    if(count($matches) == 2) {      if(array_key_exists($matches[1], $this->_validTypes)) {        $type = $this->_validTypes[$matches[1]];        if(in_array($matches[1], $this->_hasLength)) {          $length = $this->_getLength($property);        }        if($matches[1] != 'primary_autoincrement') {          $null = $this->_getNull($property);        }        $sql = '`'.$property->getName().'` '.$type.' '.$length.' '.$null;        return $sql;      } else {        throw new Exception('Type "'.$matches[1].'" is not a supported SQL type');      }    } else {      throw new Exception('Found '.count($matches).' when checking Type for property '.$property->getName());    }  }  /**   * Extracts the Length from a property   * @param ReflectionProperty $property   * @return string   */  protected function _getLength($property)  {    preg_match($this->_regexes['length'], $property->getDocComment(), $matches);    if(count($matches) == 2) {      return '('.$matches[1].')';    } else {      return '';    }  }  /**   * Determines if a Property is allowed to be null   * @param ReflectionProperty $property   * @return string   */  protected function _getNull($property)  {    preg_match($this->_regexes['null'], $property->getDocComment(), $matches);    if(count($matches) == 1) {      return 'NULL';    } else {      return 'NOT NULL';    }  }  /**   * Generates a block of SQL to create a table from an Entity   * @return string   */  public function getSql()  {    $class = new ReflectionClass($this->_className);    $definitions = array();    foreach($class->getProperties() as $property) {      if(strpos($property->getName(), '_') === false) {        $definitions[] = $this->_getDefinition($property);      }    }    $columns = implode(",n", $definitions);    $sql = "CREATE TABLE ".$this->_tableName." (".$columns.")";    if($this->_type == self::MYSQL) {      $sql .= " ENGINE=MYISAM";    }    return $sql.";";  }}