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package main
import (
"errors"
"strconv"
"strings"
)
func convert_price(price string) (int, error) {
if "" == price {
return 0, errors.New("Empty string")
}
multiply_by_10 := false
multiply_by_100 := true
price = strings.TrimSpace(price)
price = strings.TrimPrefix(price, "€")
price = strings.TrimSpace(price)
price = strings.TrimSuffix(price, "€")
price = strings.TrimSpace(price)
price = strings.TrimSuffix(strings.ToLower(price), "eur")
price = strings.TrimSpace(price)
price = strings.TrimSuffix(strings.ToLower(price), "euro")
price = strings.TrimSpace(price)
if len(price) < 2 {
price = "00" + price
} else if len(price) < 3 {
price = "0" + price
}
c := string(price[len(price)-2:])
c = string(c[0:1])
/*
Extracts the second last char and checks if it's a "." or a ",".
*/
if "," == c {
if strings.Count(price, ",") > 1 {
return 0, errors.New("Invalid format")
}
multiply_by_10 = true
multiply_by_100 = false
} else if "." == c {
if strings.Count(price, ".") > 1 {
return 0, errors.New("Invalid format")
}
multiply_by_10 = true
multiply_by_100 = false
}
c = string(price[len(price)-3:])
c = string(c[0:1])
/*
Extracts the third last char and checks if it's a "." or a ",".
*/
if "," == c {
if strings.Count(price, ",") > 1 {
return 0, errors.New("Invalid format")
}
multiply_by_10 = false
multiply_by_100 = false
} else if "." == c {
if strings.Count(price, ".") > 1 {
return 0, errors.New("Invalid format")
}
multiply_by_10 = false
multiply_by_100 = false
}
price = strings.Replace(price, ",", "", -1)
price = strings.Replace(price, ".", "", -1)
/*
Casts the price to integer in cents (not euro!).
*/
price_int, err := strconv.Atoi(price)
if err != nil {
return 0, err
}
if multiply_by_10 {
price_int = price_int * 10
} else if multiply_by_100 {
price_int = price_int * 100
}
return price_int, nil
}
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