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use super::iota_units::IotaUnits;
pub fn convert_units(amount: u64, from: IotaUnits, to: IotaUnits) -> u64 {
let amount_in_source = amount * 10_u64.pow(u32::from(from.value()));
convert_units_helper(amount_in_source, to)
}
fn convert_units_helper(amount: u64, to: IotaUnits) -> u64 {
amount / 10_u64.pow(u32::from(to.value()))
}
pub fn convert_raw_iota_amount_to_display_text(amount: u64, extended: bool) -> String {
let unit = find_optimal_iota_unit_to_display(amount);
let amount_in_display_unit = convert_amount_to(amount, unit);
create_amount_with_unit_display_text(amount_in_display_unit, unit, extended)
}
fn create_amount_with_unit_display_text(amount: f64, unit: IotaUnits, extended: bool) -> String {
if unit == IotaUnits::Iota {
format!("{} {}", amount, unit.unit())
} else if extended {
format!("{:.15} {}", amount, unit.unit())
} else {
format!("{:.2} {}", amount, unit.unit())
}
}
pub fn convert_amount_to(amount: u64, target: IotaUnits) -> f64 {
amount as f64 / 10_u64.pow(u32::from(target.value())) as f64
}
pub fn find_optimal_iota_unit_to_display(amount: u64) -> IotaUnits {
let length = amount.to_string().len();
if length >= 1 && length <= 3 {
IotaUnits::Iota
} else if length > 3 && length <= 6 {
IotaUnits::KiloIota
} else if length > 6 && length <= 9 {
IotaUnits::MegaIota
} else if length > 9 && length <= 12 {
IotaUnits::GigaIota
} else if length > 12 && length <= 15 {
IotaUnits::TeraIota
} else if length > 15 && length <= 18 {
IotaUnits::PetaIota
} else {
panic!("Invalid number")
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_convert_unit_i_to_ki() {
assert_eq!(1, convert_units(1000, IotaUnits::Iota, IotaUnits::KiloIota));
}
#[test]
fn test_convert_unit_ki_to_mi() {
assert_eq!(
1,
convert_units(1000, IotaUnits::KiloIota, IotaUnits::MegaIota)
);
}
#[test]
fn test_convert_unit_mi_to_gi() {
assert_eq!(
1,
convert_units(1000, IotaUnits::MegaIota, IotaUnits::GigaIota)
);
}
#[test]
fn test_convert_unit_gi_to_ti() {
assert_eq!(
1,
convert_units(1000, IotaUnits::GigaIota, IotaUnits::TeraIota)
);
}
#[test]
fn test_convert_unit_ti_to_pi() {
assert_eq!(
1,
convert_units(1000, IotaUnits::TeraIota, IotaUnits::PetaIota)
);
}
#[test]
fn test_find_optimize_unit_to_display() {
assert_eq!(find_optimal_iota_unit_to_display(1), IotaUnits::Iota);
assert_eq!(find_optimal_iota_unit_to_display(1000), IotaUnits::KiloIota);
assert_eq!(
find_optimal_iota_unit_to_display(1000000),
IotaUnits::MegaIota
);
assert_eq!(
find_optimal_iota_unit_to_display(1000000000),
IotaUnits::GigaIota
);
assert_eq!(
find_optimal_iota_unit_to_display(1000000000000),
IotaUnits::TeraIota
);
assert_eq!(
find_optimal_iota_unit_to_display(1000000000000000),
IotaUnits::PetaIota
);
}
#[test]
fn test_convert_raw_iota_amount_to_display_text() {
assert_eq!(convert_raw_iota_amount_to_display_text(1, false), "1 i");
assert_eq!(
convert_raw_iota_amount_to_display_text(1000, false),
"1.00 Ki"
);
assert_eq!(
convert_raw_iota_amount_to_display_text(1000000, false),
"1.00 Mi"
);
assert_eq!(
convert_raw_iota_amount_to_display_text(1000000000, false),
"1.00 Gi"
);
assert_eq!(
convert_raw_iota_amount_to_display_text(1000000000000, false),
"1.00 Ti"
);
assert_eq!(
convert_raw_iota_amount_to_display_text(1000000000000000, false),
"1.00 Pi"
);
assert_eq!(
convert_raw_iota_amount_to_display_text(1900000000000002, true),
"1.900000000000002 Pi"
);
}
}