geoBoudaries.go

func getGeoBoundaries(hex string) string {

	bondaries := h3.ToGeoBoundary(h3.FromString(hex))

	// Iterate between all points
	bondariesText := ""
	for _, p := range bondaries {
		bondariesText += fmt.Sprintf("%v %v,", p.Longitude, p.Latitude)
	}

	// Add first point again
	i := 0
	for _, p := range bondaries {
		if i == 0 {
			bondariesText += fmt.Sprintf("%v %v,", p.Longitude, p.Latitude)
			break
		}
	}

	// remove last char from string
	bondariesText = bondariesText[:len(bondariesText)-1]

	poligonQuery := fmt.Sprintf("SRID=4326;POLYGON((%v))", bondariesText)

	return poligonQuery
}