Method parseFloats

gui/builder.go:1056–1105

parseFloats parses a string with a list of floats with the specified size and returns a slice. The specified size is 0 any number of floats is allowed. The individual values can be separated by spaces or commas

(am map[string]interface{}, fname string, min, max int)

// and returns a slice. The specified size is 0 any number of floats is allowed.
// The individual values can be separated by spaces or commas
func (b *Builder) parseFloats(am map[string]interface{}, fname string, min, max int) ([]float32, error) {

	// Checks if field is empty
	v := am[fname]
	if v == nil {
		return nil, nil
	}

	// If field has only one value, it is an int or a float64
	switch ft := v.(type) {
	case int:
		return []float32{float32(ft)}, nil
	case float64:
		return []float32{float32(ft)}, nil
	}

	// Converts to string
	fs, ok := v.(string)
	if !ok {
		return nil, b.err(am, fname, "Not a string")
	}

	// Checks if string field is empty
	fs = strings.Trim(fs, " ")
	if fs == "" {
		return nil, nil
	}

	// Separate individual fields
	var parts []string
	if strings.Index(fs, ",") < 0 {
		parts = strings.Fields(fs)
	} else {
		parts = strings.Split(fs, ",")
	}
	if len(parts) < min || len(parts) > max {
		return nil, b.err(am, fname, "Invalid number of float32 values")
	}

	// Parse each field value and appends to slice
	var values []float32
	for i := 0; i < len(parts); i++ {
		val, err := strconv.ParseFloat(strings.Trim(parts[i], " "), 32)
		if err != nil {
			return nil, b.err(am, fname, err.Error())
		}
		values = append(values, float32(val))
	}
	return values, nil
}

// err creates and returns an error for the current object, field name and with the specified message
func (b *Builder) err(am map[string]interface{}, fname, msg string) error {