<?php
/*+**********************************************************************************
 * The contents of this file are subject to the vtiger CRM Public License Version 1.0
 * ("License"); You may not use this file except in compliance with the License
 * The Original Code is:  vtiger CRM Open Source
 * The Initial Developer of the Original Code is vtiger.
 * Portions created by vtiger are Copyright (C) vtiger.
 * All Rights Reserved.
 ************************************************************************************/

class CurrencyField {

	private $CURRENCY_PATTERN_PLAIN = '123456789';
	private $CURRENCY_PATTERN_SINGLE_GROUPING = '123456,789';
	private $CURRENCY_PATTERN_THOUSAND_GROUPING = '123,456,789';
	private $CURRENCY_PATTERN_MIXED_GROUPING = '12,34,56,789';

    /**
     * Currency Format(3,3,3) or (2,2,3)
     * @var String
     */
    var $currencyFormat = '123,456,789';

    /**
     * Currency Separator for example (comma, dot, hash)
     * @var String
     */
    var $currencySeparator = ',';

    /**
     * Decimal Separator for example (dot, comma, space)
     * @var <type>
     */
    var $decimalSeparator = '.';

    /**
     * Number of Decimal Numbers
     * @var Integer
     */
    var $numberOfDecimal = 3;

	/**
	 * Currency Id
	 * @var Integer
	 */
	var $currencyId = 1;

	/**
	 * Currency Symbol
	 * @var String
	 */
	var $currencySymbol;

	/**
	 * Currency Symbol Placement
	 */
	var $currencySymbolPlacement;

	/**
	 * Currency Conversion Rate
	 * @var Number
	 */
	var $conversionRate = 1;

    /**
     * Value to be converted
     * @param Number $value
     */
    var $value = null;

	/**
	 * Maximum Number Of Currency Decimals
	 * @var Number
	 */
	var $maxNumberOfDecimals = 5;
    /**
     * Constructor
     * @param Number $value
     */
    public function  __construct($value) {
        $this->value = $value;
    }

    /**
     * Initializes the User's Currency Details
     * @global Users $current_user
     * @param Users $user
     */
    public function initialize($user=null) {
        global $current_user,$default_charset;
        if(empty($user)) {
            $user = $current_user;
        }

		if(!empty($user->currency_grouping_pattern)) {
			$this->currencyFormat = html_entity_decode($user->currency_grouping_pattern, ENT_QUOTES, $default_charset);
			$this->currencySeparator = str_replace("\xC2\xA0", ' ', html_entity_decode($user->currency_grouping_separator, ENT_QUOTES, $default_charset));
			$this->decimalSeparator = str_replace("\xC2\xA0", ' ', html_entity_decode($user->currency_decimal_separator, ENT_QUOTES, $default_charset));
		}

		if(!empty($user->currency_id)) {
			$this->currencyId = $user->currency_id;
		} else {
			$this->currencyId = self::getDBCurrencyId();
		}
		$currencyRateAndSymbol = getCurrencySymbolandCRate($this->currencyId);
		$this->currencySymbol = $currencyRateAndSymbol['symbol'];
		$this->conversionRate = $currencyRateAndSymbol['rate'];
		$this->currencySymbolPlacement = $user->currency_symbol_placement;
		$this->numberOfDecimal = getCurrencyDecimalPlaces();
    }

	public function getCurrencySymbol() {
		return $this->currencySymbol;
	}


    /**
     * Returns the Formatted Currency value for the User
     * @global Users $current_user
     * @param Users $user
	 * @param Boolean $skipConversion
     * @return String - Formatted Currency
     */
    public static function convertToUserFormat($value, $user=null, $skipConversion=false, $skipFormatting=false) {
		// To support negative values
		$negative = false;
		if(stripos($value, '-') === 0) {
			$negative = true;
			$value = substr($value, 1);
		}
        $self = new self($value);
		$value = $self->getDisplayValue($user,$skipConversion,$skipFormatting);
		return ($negative) ? '-'.$value : $value;
    }

    /**
     * Function that converts the Number into Users Currency
     * @param Users $user
	 * @param Boolean $skipConversion
     * @return Formatted Currency
     */
    public function getDisplayValue($user=null, $skipConversion=false, $skipFormatting=false) {
        global $current_user;
		if(empty($user)) {
			$user = $current_user;
		}
		$this->initialize($user);

		$value = $this->value;
		if($skipConversion == false) {
			$value = self::convertFromDollar($value,$this->conversionRate);
		}

		if($skipFormatting == false) {
			$value = $this->_formatCurrencyValue($value);
		}
		return $this->currencyDecimalFormat($value, $user);
    }

	/**
     * Function that converts the Number into Users Currency along with currency symbol
     * @param Users $user
	 * @param Boolean $skipConversion
     * @return Formatted Currency
     */
    public function getDisplayValueWithSymbol($user=null, $skipConversion=false) {
        $formattedValue = $this->getDisplayValue($user, $skipConversion);
		return self::appendCurrencySymbol($formattedValue, $this->currencySymbol, $this->currencySymbolPlacement);
    }

	/**
     * Static Function that appends the currency symbol to a given currency value, based on the preferred symbol placement
	 * @param Number $currencyValue
	 * @param String $currencySymbol
	 * @param String $currencySymbolPlacement
     * @return Currency value appended with the currency symbol
     */
	public static function appendCurrencySymbol($currencyValue, $currencySymbol, $currencySymbolPlacement='') {
		global $current_user;
		if(empty($currencySymbolPlacement)) {
			$currencySymbolPlacement = $current_user->currency_symbol_placement;
		}

		switch($currencySymbolPlacement) {
			case '1.0$' :	$returnValue = $currencyValue . $currencySymbol;
							break;
			case '$1.0'	:
			default		:	$returnValue = $currencySymbol . $currencyValue;
		}
		return $returnValue;
	}

    /**
     * Function that formats the Number based on the User configured Pattern, Currency separator and Decimal separator
     * @param Number $value
     * @return Formatted Currency
     */
	private function _formatCurrencyValue($value) {

        $currencyPattern = $this->currencyFormat;
        $currencySeparator = $this->currencySeparator;
        $decimalSeparator  = $this->decimalSeparator;
        $currencyDecimalPlaces = $this->numberOfDecimal;
        $value = number_format($value, $currencyDecimalPlaces,'.','');
        if(empty($currencySeparator)) $currencySeparator = ' ';
        if(empty($decimalSeparator)) $decimalSeparator = ' ';
        
        if ($value < 0) { 
            $sign = "-"; 
            $value = substr($value, 1); 
        } else { 
            $sign = ""; 
        } 

        if($currencyPattern == $this->CURRENCY_PATTERN_PLAIN) {
			// Replace '.' with Decimal Separator
			$number = str_replace('.', $decimalSeparator, $value);
			return $sign . $number; 
		}
		if($currencyPattern == $this->CURRENCY_PATTERN_SINGLE_GROUPING) {
			// Separate the numeric and decimal parts
			$numericParts = explode('.', $value);
			$wholeNumber = $numericParts[0];
			// First part of the number which remains intact
			if(strlen($wholeNumber) > 3) {
				$wholeNumberFirstPart = substr($wholeNumber,0,strlen($wholeNumber)-3);
			}
			// Second Part of the number (last 3 digits) which should be separated from the First part using Currency Separator
			$wholeNumberLastPart = substr($wholeNumber,-3);
			// Re-create the whole number with user's configured currency separator
			if(!empty($wholeNumberFirstPart)) {
				$numericParts[0] = $wholeNumberFirstPart.$currencySeparator.$wholeNumberLastPart;
			} else {
				$numericParts[0] = $wholeNumberLastPart;
			}
			// Re-create the currency value combining the whole number and the decimal part using Decimal separator
			$number = implode($decimalSeparator, $numericParts);
			return $sign . $number; 
        }
		if($currencyPattern == $this->CURRENCY_PATTERN_THOUSAND_GROUPING) {
			$negativeNumber = false;
			if($value < 0) {
				$negativeNumber = true;
			}
			
			// Separate the numeric and decimal parts
			$numericParts = explode('.', $value);
			$wholeNumber = $numericParts[0];
			
			//check the whole number is negative value, then separate the negative symbol from whole number
			if($wholeNumber < 0 || $negativeNumber) {
				$negativeNumber = true;
				$positiveValues = explode('-', $wholeNumber);
				$wholeNumber = $positiveValues[1];
			}
			
			// Pad the rest of the length in the number string with Leading 0, to get it to the multiples of 3
			$numberLength = strlen($wholeNumber);
			// First grouping digits length
			$OddGroupLength = $numberLength%3;
			$gapsToBeFilled = 0;
			if($OddGroupLength > 0) $gapsToBeFilled = 3 - $OddGroupLength;
			$wholeNumber = str_pad($wholeNumber, $numberLength+$gapsToBeFilled, '0', STR_PAD_LEFT);
			// Split the whole number into chunks of 3 digits
			$wholeNumberParts = str_split($wholeNumber,3);
			// Re-create the whole number with user's configured currency separator
			$numericParts[0] = $wholeNumber = implode($currencySeparator, $wholeNumberParts);
			if($wholeNumber != 0) {
				$numericParts[0] = ltrim($wholeNumber, '0');
			} else {
				$numericParts[0] = 0;
			}
			
			//if its negative number, append-back the negative symbol to the whole number part
			if($negativeNumber) {
				$numericParts[0] = '-'.$numericParts[0];
			}
			
			// Re-create the currency value combining the whole number and the decimal part using Decimal separator
			$number = implode($decimalSeparator, $numericParts);
			return $sign . $number; 
		}
		if($currencyPattern == $this->CURRENCY_PATTERN_MIXED_GROUPING) {
			$negativeNumber = false;
			if($value < 0) {
				$negativeNumber = true;
			}
			
			// Separate the numeric and decimal parts
			$numericParts = explode('.', $value);
			$wholeNumber = $numericParts[0];
			
			//check the whole number is negative value, then separate the negative symbol from whole number
			if($wholeNumber < 0 || $negativeNumber) {
				$negativeNumber = true;
				$positiveValues = explode('-', $wholeNumber);
				$wholeNumber = $positiveValues[1];
			}
			
			// First part of the number which needs separate division
			if(strlen($wholeNumber) > 3) {
				$wholeNumberFirstPart = substr($wholeNumber,0,strlen($wholeNumber)-3);
			}
			// Second Part of the number (last 3 digits) which should be separated from the First part using Currency Separator
			$wholeNumberLastPart = substr($wholeNumber,-3);
			if(!empty($wholeNumberFirstPart)) {
				// Pad the rest of the length in the number string with Leading 0, to get it to the multiples of 2
				$numberLength = strlen($wholeNumberFirstPart);
				// First grouping digits length
				$OddGroupLength = $numberLength%2;
				$gapsToBeFilled = 0;
				if($OddGroupLength > 0) $gapsToBeFilled = 2 - $OddGroupLength;
				$wholeNumberFirstPart = str_pad($wholeNumberFirstPart, $numberLength+$gapsToBeFilled, '0', STR_PAD_LEFT);
				// Split the first part of tne number into chunks of 2 digits
				$wholeNumberFirstPartElements = str_split($wholeNumberFirstPart,2);
				$wholeNumberFirstPart = ltrim(implode($currencySeparator, $wholeNumberFirstPartElements), '0');
				$wholeNumberFirstPart = implode($currencySeparator, $wholeNumberFirstPartElements);
				if($wholeNumberFirstPart != 0) {
					$wholeNumberFirstPart = ltrim($wholeNumberFirstPart, '0');
				} else {
					$wholeNumberFirstPart = 0;
				}
				// Re-create the whole number with user's configured currency separator
				$numericParts[0] = $wholeNumberFirstPart.$currencySeparator.$wholeNumberLastPart;
			} else {
				$numericParts[0] = $wholeNumberLastPart;
			}
			
			//if its negative number, append-back the negative symbol to the whole number part
			if($negativeNumber) {
				$numericParts[0] = '-'.$numericParts[0];
			}
			
			// Re-create the currency value combining the whole number and the decimal part using Decimal separator
			$number = implode($decimalSeparator, $numericParts);
			return $sign . $number; 
		}
		return $number;
	}

    /**
     * Returns the Currency value without formatting for DB Operations
     * @global Users $current_user
     * @param Users $user
	 * @param Boolean $skipConversion
     * @return Number
     */
    public function getDBInsertedValue($user=null, $skipConversion=false) {
        global $current_user;
        if(empty($user)) {
            $user = $current_user;
        }

        $this->initialize($user);

		$value = $this->value;

        $currencySeparator = $this->currencySeparator;
        $decimalSeparator  = $this->decimalSeparator;
		if(empty($currencySeparator)) $currencySeparator = ' ';
		if(empty($decimalSeparator)) $decimalSeparator = ' ';
        $value = str_replace("$currencySeparator", "", $value);
        $value = str_replace("$decimalSeparator", ".", $value);

		if($skipConversion == false) {
			$value = self::convertToDollar($value,$this->conversionRate);
		}
		//$value = round($value, $this->maxNumberOfDecimals);

        return $value;
    }

    /**
     * Returns the Currency value without formatting for DB Operations
     * @param Number $value
     * @param Users $user
	 * @param Boolean $skipConversion
     * @return Number
     */
	public static function convertToDBFormat($value, $user=null, $skipConversion=false) {
        $self = new self($value);
        return $self->getDBInsertedValue($user, $skipConversion);
    }

	/**
	 * Function to get the default CRM currency
	 * @return Integer Default system currency id
	 */
	public static function getDBCurrencyId() {
		$adb = PearDatabase::getInstance();

		$result = $adb->pquery('SELECT id FROM vtiger_currency_info WHERE defaultid < 0', array());
		$noOfRows = $adb->num_rows($result);
		if($noOfRows > 0) {
			return $adb->query_result($result, 0, 'id');
		}
		return null;
	}
	
	public static function convertToDollar($amount, $conversionRate) {
		if ($conversionRate == 0) return 0;
		return $amount / $conversionRate;
	}
	
	public static function convertFromDollar($amount, $conversionRate) {
		$currencyField = new CurrencyField($amount);
		return round($amount * $conversionRate, $currencyField->maxNumberOfDecimals);
	}
	
	/** This function returns the amount converted from master currency.
	 * param $amount - amount to be converted.
	 * param $crate - conversion rate.
	 */
	public static function convertFromMasterCurrency($amount, $conversionRate) {
		return $amount * $conversionRate;
	}
	
	function currencyDecimalFormat($value, $user = null){
		global $current_user;
		if (!$user) {
			$user = $current_user;
		}
		if($user->truncate_trailing_zeros == true) {
            if(strpos($value, $user->currency_decimal_separator) != 0){
                /**
                 * We should trim extra zero's if only the value had decimal separator(Ex :- 1600.00)
                 * else it'll change orginal value
                 */
                $value = rtrim($value, '0');
            }
            if($user->currency_decimal_separator == '&nbsp;')
                $decimalSeparator = ' ';
            else
				$decimalSeparator = $user->currency_decimal_separator;

			$fieldValue = explode(decode_html($decimalSeparator), $value);
			if(strlen($fieldValue[1]) <= 1){
				if(strlen($fieldValue[1]) == 1) {
					return $value = $fieldValue[0].$decimalSeparator.$fieldValue[1];
				} else if (!strlen($fieldValue[1])) {
					return $value = $fieldValue[0];
				} else {
					return $value = $fieldValue[0].$decimalSeparator;
				}
			}else{
				return preg_replace("/(?<=\\.[0-9])[0]+\$/","",$value);
			}
		}else{
			return $value;
		}
	}
}
?>