From a42853ac5a87daa739e03519f314db4e135c8c4d Mon Sep 17 00:00:00 2001 From: Julia Lange Date: Thu, 5 Feb 2026 12:05:43 -0800 Subject: [PATCH] score, initialize core functionality and types Adds Chrono package Adds a "Result" type to lib.rs creates helpful type aliases for Score, Boost, and Gravity. Creates a "TimedScore" which is a value and time data for calculating score over time. There are two forms of this, Boosted and Decaying. Since a Score can either be decaying over time or have been boosted recently and be kept from decaying for some time. Also implements a BoostedScore and a DecayingScore, which are both TimedScores which represent the different states. These are important because you can't boost a BoostedScore for instance. --- koucha/Cargo.lock | 507 ++++++++++++++++++++++++++++++++++++++++++++ koucha/Cargo.toml | 2 + koucha/src/lib.rs | 5 + koucha/src/score.rs | 193 +++++++++++++++++ 4 files changed, 707 insertions(+) create mode 100644 koucha/src/score.rs diff --git a/koucha/Cargo.lock b/koucha/Cargo.lock index 476c80f..cfc34e4 100644 --- a/koucha/Cargo.lock +++ b/koucha/Cargo.lock @@ -2,6 +2,513 @@ # It is not intended for manual editing. version = 4 +[[package]] +name = "android_system_properties" +version = "0.1.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311" +dependencies = [ + "libc", +] + +[[package]] +name = "autocfg" +version = "1.5.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8" + +[[package]] +name = "bitflags" +version = 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[dependencies] +tokio = { version = "1.49.0", features = ["full"] } +chrono = "0.4.43" diff --git a/koucha/src/lib.rs b/koucha/src/lib.rs index e69de29..ceed6cb 100644 --- a/koucha/src/lib.rs +++ b/koucha/src/lib.rs @@ -0,0 +1,5 @@ +use std::error::Error; + +type Result = std::result::Result>; + +pub mod score; diff --git a/koucha/src/score.rs b/koucha/src/score.rs new file mode 100644 index 0000000..8b27b09 --- /dev/null +++ b/koucha/src/score.rs @@ -0,0 +1,193 @@ +use chrono::{DateTime, Utc, TimeDelta}; +use crate::{Result}; +use std::ops::{Add, Sub}; + +mod default { + use crate::score::SECONDS_IN_A_DAY; + + pub const INITIAL_SCORE: i64 = 70; + pub const GRAVITY: i64 = -10; + pub const BOOST: i64 = 12; + pub const BOOST_FREEZE_IN_SECONDS: i64 = SECONDS_IN_A_DAY; +} +const SECONDS_IN_A_DAY: i64 = 60 * 60 * 24; + +macro_rules! rich_i64 { + ($name:ident) => { + #[derive(PartialOrd, PartialEq, Debug, Copy, Clone)] + pub struct $name(i64); + impl From<$name> for i64 { fn from(id: $name) -> Self { id.0 } } + }; +} + +macro_rules! defaulting_i64 { + ($name:ident, $default:expr) => { + rich_i64!($name); + impl $name { + pub fn new(value: Option) -> Self { + Self(value.unwrap_or($default)) + } + } + }; +} + +macro_rules! addable_i64s { + ($lhs:ident, $rhs:ident) => { + impl Add<$rhs> for $lhs { + type Output = Self; + fn add(self, other: $rhs) -> Self::Output { Self(self.0 + other.0) } + } + } +} + +defaulting_i64!(Score, default::INITIAL_SCORE); +addable_i64s!(Score, Score); +addable_i64s!(Score, Boost); +impl Sub for Score { + type Output = Self; + fn sub(self, other: Boost) -> Self::Output { Self(self.0 - other.0) } +} +addable_i64s!(Score, GravityOverDuration); +defaulting_i64!(Boost, default::BOOST); +defaulting_i64!(Gravity, default::GRAVITY); +rich_i64!(GravityOverDuration); +impl Gravity { + fn over_duration( + &self, start: DateTime, end: DateTime + ) -> GravityOverDuration { + let elapsed_time = end.signed_duration_since(start); + GravityOverDuration( + self.0 * (elapsed_time.num_seconds() / SECONDS_IN_A_DAY) + ) + } +} + +#[derive(Clone)] +pub enum TimedScore { + Decaying(DecayingScore), + Boosted(BoostedScore), +} + +impl TimedScore { + pub fn new() -> DecayingScore { + Self::new_with_initial(Score::new(None)) + } + + pub fn new_with_initial(initial_score: Score) -> DecayingScore { + Self::new_with_initial_and_time(initial_score, Utc::now()) + } + + pub fn new_with_initial_and_time( + initial: Score, time: DateTime + ) -> DecayingScore { + DecayingScore { + value: initial, + last_updated: time, + } + } + + pub fn get_score(&self) -> Score { + match self { + Self::Decaying(s) => s.get_score(), + Self::Boosted(b) => b.get_score(), + } + } + + pub fn update_score(self, gravity: Gravity) -> Self { + self.update_score_at_time(gravity, Utc::now()) + } + + fn update_score_at_time(self, gravity: Gravity, time: DateTime) -> Self { + match self { + Self::Decaying(d) => TimedScore::Decaying( + d.apply_gravity_to_time(gravity, time) + ), + Self::Boosted(b) => { + let try_unfrozen = b.try_unfreeze_at_time(time); + match try_unfrozen { + Self::Decaying(s) => TimedScore::Decaying( + s.apply_gravity_to_time(gravity, time) + ), + Self::Boosted(b) => TimedScore::Boosted(b), + } + } + } + } + + pub fn get_decaying(self) -> Result { + match self { + Self::Decaying(s) => Ok(s), + Self::Boosted(_) => Err("Attempted to get_decaying() of a boosted score".into()), + } + } + + pub fn get_boosted(self) -> Result { + match self { + Self::Decaying(_) => Err("Attempted to get_boosted() of a decaying score".into()), + Self::Boosted(b) => Ok(b), + } + } +} + +#[derive(Clone)] +pub struct BoostedScore { + value: Score, + boosted_at: DateTime, +} + +#[derive(Clone)] +pub struct DecayingScore { + value: Score, + last_updated: DateTime, +} + +impl DecayingScore { + fn get_score(&self) -> Score { + self.value + } + + fn apply_gravity_to_time( + self, gravity: Gravity, update_time: DateTime + ) -> Self { + Self { + last_updated: update_time, + value: self.value + gravity.over_duration(self.last_updated, update_time), + } + } + + pub fn boost(self, boost: Boost) -> BoostedScore { + self.boost_at_time(boost, Utc::now()) + } + + fn boost_at_time(self, boost: Boost, boost_time: DateTime) -> BoostedScore { + BoostedScore { + value: self.value + boost, + boosted_at: boost_time, + } + } +} + +impl BoostedScore { + fn get_score(&self) -> Score { + self.value + } + + pub fn unboost(self, boost: Boost) -> DecayingScore { + DecayingScore { + value: self.value - boost, + last_updated: self.boosted_at, + } + } + + fn try_unfreeze_at_time(self, update_time: DateTime) -> TimedScore { + let boost_end = self.boosted_at + TimeDelta::seconds(default::BOOST_FREEZE_IN_SECONDS); + if boost_end < update_time { + TimedScore::Decaying(DecayingScore { + value: self.value, + last_updated: boost_end, + }) + } else { + TimedScore::Boosted(self) + } + } +}