use maidsafe_utilities::event_sender::MaidSafeObserver;
#[cfg(any(test, feature = "use-mock-crust"))]
use maidsafe_utilities::SeededRng;
#[cfg(all(not(test), not(feature = "use-mock-crust")))]
use rand;
#[cfg(any(test, feature = "use-mock-crust"))]
use rand::Rng;
use xor_name::XorName;
pub type RoutingActionSender = MaidSafeObserver<::action::Action>;
#[derive(Ord, PartialOrd, Debug, Clone, Copy, Eq, PartialEq, Serialize, Deserialize, Hash)]
pub struct MessageId(XorName);
impl MessageId {
#[cfg(any(test, feature = "use-mock-crust"))]
pub fn new() -> MessageId {
let mut rng = SeededRng::thread_rng();
MessageId(rng.gen())
}
#[cfg(all(not(test), not(feature = "use-mock-crust")))]
pub fn new() -> MessageId {
MessageId(rand::random())
}
pub fn zero() -> MessageId {
MessageId(XorName([0; 32]))
}
pub fn from_lost_node(mut name: XorName) -> MessageId {
name.0[0] = b'L';
MessageId(name)
}
pub fn from_added_node(mut name: XorName) -> MessageId {
name.0[0] = b'A';
MessageId(name)
}
pub fn from_reverse(name: &MessageId) -> MessageId {
let MessageId(XorName(mut name_mut)) = *name;
name_mut.reverse();
MessageId(XorName(name_mut))
}
pub fn increment_first_byte(message_id: &MessageId) -> MessageId {
let MessageId(XorName(mut vec_mut)) = *message_id;
vec_mut[0] = vec_mut[0].wrapping_add(1);
MessageId(XorName(vec_mut))
}
pub fn decrement_first_byte(message_id: &MessageId) -> MessageId {
let MessageId(XorName(mut vec_mut)) = *message_id;
vec_mut[0] = vec_mut[0].wrapping_sub(1);
MessageId(XorName(vec_mut))
}
}
impl Default for MessageId {
fn default() -> MessageId {
MessageId::zero()
}
}
#[cfg(test)]
#[cfg_attr(feature = "cargo-clippy", allow(indexing_slicing))]
mod tests {
use super::MessageId;
use xor_name::{XorName, XOR_NAME_LEN};
#[test]
fn increment() {
let message_id = MessageId::increment_first_byte(&MessageId(XorName([255; XOR_NAME_LEN])));
let MessageId(XorName(vec_bytes)) = message_id;
assert_eq!(vec_bytes[0], 0);
}
#[test]
fn decrement() {
let message_id = MessageId::decrement_first_byte(&MessageId(XorName([0; XOR_NAME_LEN])));
let MessageId(XorName(vec_bytes)) = message_id;
assert_eq!(vec_bytes[0], 255);
}
}