templatefuncs

var FuncMap = template.FuncMap{
	"sliceLen": func(data interface{}) int {
		dataJSON, _ := json.Marshal(data)
		var newData []interface{}
		json.Unmarshal(dataJSON, &newData)
		return len(newData)
	},
	"addInts": func(ints ...int) int {
		total := int(0)
		for _, v := range ints {
			total += v
		}
		return total
	},
	"multiplyInts": func(ints ...int) int {
		total := int(0)
		for _, v := range ints {
			total *= v
		}
		return total
	},
	"subtractInts": func(x, y int) int {
		return x - y
	},
	"divideInts": func(x, y int) int {
		return x / y
	},
	"roundFloat": func(num float64) float64 {
		return math.Ceil(num)
	},
	"numberFormat": func(num float64) string {
		str := fmt.Sprintf("%.0f", num)
		re := regexp.MustCompile("(\\d+)(\\d{3})")
		for n := ""; n != str; {
			n = str
			str = re.ReplaceAllString(str, "$1,$2")
		}
		return str
	},
	"dateFormat": func(dateStr string) string {
		date, err := time.Parse(time.RFC3339, dateStr)
		if err != nil {
			return ""
		}
		yy, mm, dd := date.Date()
		return strconv.Itoa(yy) + " - " + mm.String() + " - " + strconv.Itoa(dd)
	},
	"jsonEncode": func(data interface{}) string {
		jsonData, err := json.Marshal(data)
		if err != nil {
			return ""
		}
		return strings.ReplaceAll(string(jsonData), "\"", "'")
	},
	"StrToUpper":     strings.ToUpper,
	"StrToLower":     strings.ToLower,
	"StrContains":    strings.Contains,
	"StrIndex":       strings.Index,
	"StrToTitle":     strings.ToTitle,
	"StrTitle":       strings.Title,
	"StrTrim":        strings.Trim,
	"StrTrimLeft":    strings.TrimLeft,
	"StrTrimPrefix":  strings.TrimPrefix,
	"StrTrimRight":   strings.TrimRight,
	"StrTrimSpace":   strings.TrimSpace,
	"StrTrimSuffix":  strings.TrimSuffix,
	"StrRepeat":      strings.Repeat,
	"StrReplace":     strings.Replace,
	"Join":           strings.Join,
	"StrCompare":     strings.Compare,
	"StrContainsAny": strings.ContainsAny,
	"StrCount":       strings.Count,
	"StrEqualFold":   strings.EqualFold,
	"StrHasPrefix":   strings.HasPrefix,
	"StrHasSuffix":   strings.HasSuffix,
}