diff options
Diffstat (limited to 'src/session.rs')
-rw-r--r-- | src/session.rs | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/src/session.rs b/src/session.rs new file mode 100644 index 0000000..ea3cc75 --- /dev/null +++ b/src/session.rs @@ -0,0 +1,92 @@ +use std::{ + collections::{hash_map::Entry, HashMap}, + fmt::Display, + iter::IntoIterator, + time::{Duration, SystemTime, UNIX_EPOCH}, +}; + +use serde::{Deserialize, Serialize}; + +pub trait SessionSource { + type Error; + + type Iter: IntoIterator<Item = Session>; + + fn sessions(&self) -> Result<Self::Iter, Self::Error>; + + fn update( + &self, + mut hash_map: HashMap<String, Session>, + ) -> Result<HashMap<String, Session>, Self::Error> { + for session in self.sessions()? { + match hash_map.entry(session.name.to_owned()) { + Entry::Occupied(mut o) if &session > o.get() => { + o.insert(session); + } + Entry::Vacant(v) => { + v.insert(session); + } + _ => {} + } + } + Ok(hash_map) + } +} + +#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)] +pub enum State { + Discovered, + Connected, + Updated, +} + +#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)] +pub struct Session { + pub state: State, + + #[serde(with = "epoch_timestamp")] + pub timestamp: Duration, + + pub name: String, +} + +mod epoch_timestamp { + use std::time::Duration; + + use serde::{self, Deserialize, Deserializer, Serializer}; + + pub fn serialize<S>(duration: &Duration, serializer: S) -> Result<S::Ok, S::Error> + where + S: Serializer, + { + serializer.serialize_u64(duration.as_secs()) + } + + pub fn deserialize<'de, D>(d: D) -> Result<Duration, D::Error> + where + D: Deserializer<'de>, + { + u64::deserialize(d).map(Duration::from_secs) + } +} + +impl Display for Session { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "{}", self.name) + } +} + +impl From<String> for Session { + fn from(name: String) -> Self { + let timestamp = SystemTime::now() + .duration_since(UNIX_EPOCH) + .expect("Current time is pre-epoch. (Time traveler?)"); + + Self { + state: State::Discovered, + timestamp, + name, + } + } +} + |