<?php

class DB_Model extends FHC_Model
{
	protected $dbTable;  // Name of the DB-Table for CI-Insert, -Update, ...
	protected $pk;  // Name of the PrimaryKey for DB-Update, Load, ...
	protected $acl;  // Name of the PrimaryKey for DB-Update, Load, ...
	
	// Addon ID, stored to let to check the permissions
	private $_addonID;

	function __construct($dbTable = null, $pk = null)
	{
		parent::__construct();
		$this->dbTable = $dbTable;
		$this->pk = $pk;
		$this->load->database();
		$this->acl = $this->config->item('fhc_acl');
	}

	/** ---------------------------------------------------------------
	 * Insert Data into DB-Table
	 *
	 * @param   array $data  DataArray for Insert
	 * @return  array
	 */
	public function insert($data)
	{
		// Check Class-Attributes
		if(is_null($this->dbTable))
			return $this->_error(lang('fhc_'.FHC_NODBTABLE), FHC_MODEL_ERROR);

		// Check rights
		if (! $this->fhc_db_acl->isBerechtigt((string)($this->acl[$this->dbTable]), 'i'))
			return $this->_error(lang('fhc_'.FHC_NORIGHT).' -> '.$this->acl[$this->dbTable], FHC_MODEL_ERROR);

		// DB-INSERT
		if ($this->db->insert($this->dbTable, $data))
			return $this->_success($this->db->insert_id());
		else
			return $this->_error($this->db->error(), FHC_DB_ERROR);
	}

	/** ---------------------------------------------------------------
	 * Replace Data in DB-Table
	 *
	 * @param   array $data  DataArray for Replacement
	 * @return  array
	 */
	public function replace($data)
	{
		// Check Class-Attributes
		if(is_null($this->dbTable))
			return $this->_error(lang('fhc_'.FHC_NODBTABLE), FHC_MODEL_ERROR);
		
		// Check rights
		if (! $this->fhc_db_acl->isBerechtigt((string)($this->acl[$this->dbTable]), 'ui'))
			return $this->_error(lang('fhc_'.FHC_NORIGHT).' -> '.$this->acl[$this->dbTable], FHC_MODEL_ERROR);

		// DB-REPLACE
		if ($this->db->replace($this->dbTable, $data))
			return $this->_success($this->db->insert_id());
		else
			return $this->_error($this->db->error(), FHC_DB_ERROR);
	}

	/** ---------------------------------------------------------------
	 * Update Data in DB-Table
	 *
	 * @param   string $id  PK for DB-Table
	 * @param   array $data  DataArray for Insert
	 * @return  array
	 */
	public function update($id, $data)
	{
		// Check Class-Attributes
		if(is_null($this->dbTable))
			return $this->_error(lang('fhc_'.FHC_NODBTABLE), FHC_MODEL_ERROR);
		if(is_null($this->pk))
			return $this->_error(lang('fhc_'.FHC_NOPK), FHC_MODEL_ERROR);
		
		// Check rights
		if (! $this->fhc_db_acl->isBerechtigt((string)($this->acl[$this->dbTable]), 'u'))
			return $this->_error(lang('fhc_'.FHC_NORIGHT).' -> '.$this->acl[$this->dbTable], FHC_MODEL_ERROR);

		// DB-UPDATE
		$this->db->where($this->pk, $id);
		if ($this->db->update($this->dbTable, $data))
			return $this->_success($id);
		else
			return $this->_error($this->db->error(), FHC_DB_ERROR);
	}

	/** ---------------------------------------------------------------
	 * Load data from DB-Table
	 *
	 * @param   string $id  Primary Key for SELECT
	 * @return  array
	 */
	public function load($id)
	{
		// Check Class-Attributes
		if(is_null($this->dbTable))
			return $this->_error(lang('fhc_'.FHC_NODBTABLE), FHC_MODEL_ERROR);
		if(is_null($this->pk))
			return $this->_error(lang('fhc_'.FHC_NOPK), FHC_MODEL_ERROR);
		
		// Check rights
		if (! $this->fhc_db_acl->isBerechtigt((string)($this->acl[$this->dbTable]), 's'))
			return $this->_error(lang('fhc_'.FHC_NORIGHT).' -> '.$this->acl[$this->dbTable], FHC_MODEL_ERROR);

		// DB-SELECT
		$result = $this->db->get_where($this->dbTable, array($this->pk => $id));
		//var_dump($result);
		if ($result)
			return $this->_success($result);
		else
			return $this->_error($this->db->error(), FHC_DB_ERROR);
	}

	/** ---------------------------------------------------------------
	 * Delete data from DB-Table
	 *
	 * @param   string $id  Primary Key for DELETE
	 * @return  array
	 */
	public function delete($id)
	{
		// Check Class-Attributes
		if(is_null($this->dbTable))
			return $this->_error(lang('fhc_'.FHC_NODBTABLE), FHC_MODEL_ERROR);
		if(is_null($this->pk))
			return $this->_error(lang('fhc_'.FHC_NOPK), FHC_MODEL_ERROR);
		
		// Check rights
		if (! $this->fhc_db_acl->isBerechtigt($this->acl[$this->dbTable], 'd'))
			return $this->_error(lang('fhc_'.FHC_NORIGHT).' -> '.$this->acl[$this->dbTable], FHC_MODEL_ERROR);

		// DB-DELETE
		if ($this->db->delete($this->dbTable, array($this->pk => $id)))
			return $this->_success($id);
		else
			return $this->_error($this->db->error(), FHC_DB_ERROR);
	}

	/** ---------------------------------------------------------------
	 * Convert PG-Array to PHP-Array
	 *
	 * @param   integer  config.php error code numbers
	 * @return  array
	 */
	public function pgArrayPhp($s,$start=0,&$end=NULL)
	{
		if (empty($s) || $s[0]!='{') return NULL;
		$return = array();
		$br = 0;
		$string = false;
		$quote='';
		$len = strlen($s);
		$v = '';
		for($i=$start+1; $i<$len;$i++)
		{
		    $ch = $s[$i];
		    if (!$string && $ch=='}')
			{
		        if ($v!=='' || !empty($return))
					$return[] = $v;
		        $end = $i;
		        break;
		    }
			else
				if (!$string && $ch=='{')
				    $v = $this->pgArrayPhp($s,$i,$i);
				else
					if (!$string && $ch==',')
					{
				    	$return[] = $v;
				    	$v = '';
					}
					else
						if (!$string && ($ch=='"' || $ch=="'"))
						{
							$string = TRUE;
							$quote = $ch;
						}
						else
							if ($string && $ch==$quote && $s[$i-1]=="\\")
								$v = substr($v,0,-1).$ch;
							else
								if ($string && $ch==$quote && $s[$i-1]!="\\")
									$string = FALSE;
								else
									$v .= $ch;
		}
		return $return;
	}

	/** ---------------------------------------------------------------
	 * Invalid ID
	 *
	 * @param   integer  config.php error code numbers
	 * @return  array
	 */
	protected function _invalid_id($error = '')
	{
		return array(
			'err' => 1,
			'code' => $error,
			'msg' => lang('fhc_' . $error)
		);
	}
	
	/**
	 * Method setAddonID
	 * 
	 * @param $addonID
	 * @return void
	 */
	public function setAddonID($addonID)
	{
		$this->_addonID = $addonID;
	}
	
	/**
	 * Method getAddonID
	 * 
	 * @return string _addonID
	 */
	public function getAddonID()
	{
		return $this->_addonID;
	}
}