grokify/mogo

package strconvutil

import (
    "fmt"
    "strconv"
    "strings"

    "github.com/grokify/mogo/text/languageutil"
)

// var rxComma = regexp.MustCompile(`,`)

// AtoiLang provides language parsing to handle
// thousands separators.
// Number formats: https://docs.oracle.com/cd/E19455-01/806-0169/overview-9/index.html
func AtoiLang(lang, s string) (int, error) {
    s = strings.TrimSpace(s)
    sepThousands, err := ThousandsSeparator(lang)
    if err != nil {
        return 0, err
    }
    if len(sepThousands) > 0 {
        s = strings.Replace(s, sepThousands, "", -1)
    }
    return strconv.Atoi(s)
}

func DecimalSeparator(lang string) (string, error) {
    lang = strings.ToLower(strings.TrimSpace(lang))
    if lang == languageutil.English ||
        lang == languageutil.Thai {
        return ".", nil
    } else if lang == languageutil.Italian ||
        lang == languageutil.Norwegian ||
        lang == languageutil.Spanish {
        return ",", nil
    } else if lang == languageutil.Danish ||
        lang == languageutil.Finnish ||
        lang == languageutil.French ||
        lang == languageutil.German {
        return ",", nil
    }
    return "", fmt.Errorf("language not found [%s]", lang)
}

func ThousandsSeparator(lang string) (string, error) {
    lang = strings.ToLower(strings.TrimSpace(lang))
    if lang == languageutil.English ||
        lang == languageutil.Thai {
        return ",", nil
    } else if lang == languageutil.Italian ||
        lang == languageutil.Norwegian ||
        lang == languageutil.Spanish {
        return ".", nil
    } else if lang == languageutil.Danish ||
        lang == languageutil.Finnish ||
        lang == languageutil.French ||
        lang == languageutil.German {
        return " ", nil
    }
    return "", fmt.Errorf("language not found [%s]", lang)
}