<?php

class kFormatter extends kBase {


	/**
	 * Convert's value to match type from config
	 *
	 * @param mixed $value
	 * @param Array $options
	 * @return mixed
	 * @access protected
	 */
	function TypeCast($value, $options)
	{
		$ret = true;
		if( isset($options['type']) )
		{
			$field_type = $options['type'];
			$type_ok = preg_match('#int|integer|double|float|real|numeric|string#', $field_type);
			if ($field_type == 'string') {
				if (!$this->Application->IsAdmin() && isset($options['allow_html']) && $options['allow_html']) {
					// this allows to revert htmlspecialchars call for each field submitted on front-end
					$value = unhtmlentities($value);
				}
				return $value;
			}

			static $comma = null;
			static $thousands = null;
			if (is_null($comma) || is_null($thousands)) {
				$lang =& $this->Application->recallObject('lang.current');
				$comma = $lang->GetDBField('DecimalPoint');
				$thousands = $lang->GetDBField('ThousandSep');
			}

			$value = str_replace($thousands, '', $value);
			$value = str_replace($comma, '.', $value);

			if ($value != '' && $type_ok)
			{
				$ret = is_numeric($value);
				if($ret)
				{
					$f = 'is_'.$field_type;
					settype($value, $field_type);
					$ret = $f($value);
				}
			}
		}

		return $ret ? $value : false;
	}

	function TypeCastArray($src, &$object)
	{
		$dst = array();
		foreach ($src as $id => $row) {
			$tmp_row = array();
			foreach ($row as $fld => $value) {
				$tmp_row[$fld] = $this->TypeCast($value, $object->Fields[$fld]);
			}
			$dst[$id] = $tmp_row;
		}
		return $dst;
	}

//function Format($value, $options, &$errors)
	function Format($value, $field_name, &$object, $format=null)
	{
		if ( is_null($value) ) return '';

		$options = $object->GetFieldOptions($field_name);
		if ( isset($format) ) $options['format'] = $format;
		$tc_value = $value; // $this->TypeCast($value,$options);
		if( ($tc_value === false) || ("$tc_value" != "$value") ) return $value; // for leaving badly formatted date on the form

		if (isset($options['format'])) {
			$tc_value = sprintf($options['format'], $tc_value);
		}

		if (preg_match('#int|integer|double|float|real|numeric#', $options['type'])) {
			$lang =& $this->Application->recallObject('lang.current');
			return $lang->formatNumber($tc_value);
		}

		return $tc_value;
	}

	/**
	 * Performs basic type validation on form field value
	 *
	 * @param mixed $value
	 * @param string $field_name
	 * @param kDBItem $object
	 * @return mixed
	 */
	function Parse($value, $field_name, &$object)
	{
		if ($value == '') return NULL;

		$options = $object->GetFieldOptions($field_name);
		$tc_value = $this->TypeCast($value,$options);
		if($tc_value === false) return $value; // for leaving badly formatted date on the form

		if(isset($options['type'])) {
			if (preg_match('#double|float|real|numeric#', $options['type'])) {
				$tc_value = str_replace(',', '.', $tc_value);
			}
		}

		if (isset($options['regexp'])) {
			if (!preg_match($options['regexp'], $value)) {
				$object->SetError($field_name, 'invalid_format');
			}
		}

		return $tc_value;
	}

	function HumanFormat($format)
	{
		return $format;
	}


	/**
	 * The method is supposed to alter config options or cofigure object in some way based on its usage of formatters
	 * The methods is called for every field with formatter defined when configuring item.
	 * Could be used for adding additional VirtualFields to an object required by some special Formatter
	 *
	 * @param string $field_name
	 * @param array $field_options
	 * @param kDBBase $object
	 */
	function PrepareOptions($field_name, &$field_options, &$object)
	{

	}

	/**
	 * Used for split fields like timestamp -> date, time
	 * Called from DBItem to update sub fields values after loading item
	 *
	 * @param unknown_type $field
	 * @param unknown_type $value
	 * @param unknown_type $options
	 * @param unknown_type $object
	 */
	function UpdateSubFields($field, $value, &$options, &$object)
	{

	}

	/**
	 * Used for split fields like timestamp -> date, time
	 * Called from DBItem Validate (before validation) to get back master field value from its sub_fields
	 *
	 * @param unknown_type $field
	 * @param unknown_type $value
	 * @param unknown_type $options
	 * @param unknown_type $object
	 */
	function UpdateMasterFields($field, $value, &$options, &$object)
	{

	}

/*	function GetErrorMsg($pseudo_error, $options)
	{
		if ( isset($options['error_msgs'][$pseudo_error]) ) {
			return $options['error_msgs'][$pseudo_error];
		}
		else {
			return $this->ErrorMsgs[$pseudo_error];
		}
	}*/

	function GetSample($field, &$options, &$object)
	{
		if (isset($options['sample_value'])) return $options['sample_value'];
	}

}