Use Dijkstra's algorithm to construct hyp. adv.
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129
src/datasets.rs
129
src/datasets.rs
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@ -413,11 +413,13 @@ pub fn get_edges(
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connection: &Connection,
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dataset: &str,
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player: PlayerId,
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) -> sqlite::Result<Vec<(PlayerId, f64)>> {
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) -> sqlite::Result<Vec<(PlayerId, f64, u64)>> {
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let query = format!(
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r#"SELECT iif(:pl = player_B, player_A, player_B) AS id, iif(:pl = player_B, -advantage, advantage) AS advantage
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FROM "{}_network"
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WHERE player_A = :pl OR player_B = :pl"#,
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r#"SELECT
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iif(:pl = player_B, player_A, player_B) AS id,
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iif(:pl = player_B, -advantage, advantage) AS advantage, sets_count
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FROM "{}_network"
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WHERE player_A = :pl OR player_B = :pl"#,
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dataset
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);
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@ -430,6 +432,7 @@ pub fn get_edges(
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Ok((
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PlayerId(r_.read::<i64, _>("id") as u64),
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r_.read::<f64, _>("advantage"),
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r_.read::<i64, _>("sets_count") as u64,
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))
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})
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.try_collect()
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@ -462,64 +465,82 @@ pub fn either_isolated(
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pub fn hypothetical_advantage(
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connection: &Connection,
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dataset: &str,
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decay_rate: f64,
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player1: PlayerId,
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player2: PlayerId,
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set_limit: u64,
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decay_rate: f64,
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adj_decay_rate: f64,
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) -> sqlite::Result<f64> {
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use std::collections::HashSet;
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use std::collections::{HashMap, HashSet};
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// Check trivial cases
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if player1 == player2 || either_isolated(connection, dataset, player1, player2)? {
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return Ok(0.0);
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}
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let mut paths: Vec<(Vec<PlayerId>, f64)> = vec![(vec![player1], 0.0)];
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let mut visited: HashSet<PlayerId> = HashSet::new();
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let mut queue: HashMap<PlayerId, (f64, f64)> = HashMap::from([(player1, (0.0, 1.0))]);
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let mut final_path: Option<(f64, usize)> = None;
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while !queue.is_empty() {
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let visiting = *queue
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.iter()
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.max_by(|a, b| a.1 .1.partial_cmp(&b.1 .1).unwrap())
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.unwrap()
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.0;
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let (adv_v, decay_v) = queue.remove(&visiting).unwrap();
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let connections = get_edges(connection, dataset, visiting)?;
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while final_path.is_none() {
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if paths.is_empty() {
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return Ok(0.0);
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}
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paths = paths
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for (id, adv, sets) in connections
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.into_iter()
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.map(|(path, old_adv)| {
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let last = *path.last().unwrap();
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Ok(get_edges(connection, dataset, last)?
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.into_iter()
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.filter_map(|(id, adv)| {
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if visited.contains(&id) {
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None
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} else {
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if id == player2 {
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final_path = Some((old_adv + adv, path.len() - 1));
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}
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visited.insert(id);
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let mut path_ = path.clone();
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path_.extend_one(id);
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Some((path_, old_adv + adv))
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}
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})
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.collect::<Vec<_>>())
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})
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.try_fold(Vec::new(), |mut acc, paths| {
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acc.extend(paths?);
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Ok(acc)
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})?;
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.filter(|(id, _, _)| !visited.contains(id))
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{
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let advantage = adv_v + adv;
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if id == player2 {
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return Ok(advantage * decay_v);
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}
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let decay = decay_v
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* if sets >= set_limit {
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decay_rate
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} else {
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adj_decay_rate
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};
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if queue
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.get(&id)
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.map(|(_, decay_old)| *decay_old < decay)
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.unwrap_or(true)
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{
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queue.insert(id, (advantage, decay));
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}
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}
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visited.insert(visiting);
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}
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let (final_adv, len) = final_path.unwrap();
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Ok(final_adv * decay_rate.powi(len as i32))
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// No path found
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Ok(0.0)
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}
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pub fn initialize_edge(
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connection: &Connection,
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dataset: &str,
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decay_rate: f64,
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player1: PlayerId,
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player2: PlayerId,
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set_limit: u64,
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decay_rate: f64,
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adj_decay_rate: f64,
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) -> sqlite::Result<f64> {
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let adv = hypothetical_advantage(connection, dataset, decay_rate, player1, player2)?;
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let adv = hypothetical_advantage(
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connection,
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dataset,
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player1,
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player2,
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set_limit,
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decay_rate,
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adj_decay_rate,
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)?;
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insert_advantage(connection, dataset, player1, player2, adv)?;
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Ok(adv)
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}
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@ -644,15 +665,15 @@ CREATE TABLE IF NOT EXISTS datasets (
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assert_eq!(
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get_edges(&connection, "test", PlayerId(1))?,
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[(PlayerId(2), -1.0), (PlayerId(3), 5.0)]
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[(PlayerId(2), -1.0, 0), (PlayerId(3), 5.0, 0)]
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);
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assert_eq!(
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get_edges(&connection, "test", PlayerId(2))?,
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[(PlayerId(1), 1.0)]
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[(PlayerId(1), 1.0, 0)]
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);
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assert_eq!(
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get_edges(&connection, "test", PlayerId(3))?,
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[(PlayerId(1), -5.0)]
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[(PlayerId(1), -5.0, 0)]
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);
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Ok(())
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}
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@ -670,10 +691,19 @@ CREATE TABLE IF NOT EXISTS datasets (
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Timestamp(0),
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)?;
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let metadata = metadata();
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for i in 1..=num_players {
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for j in 1..=num_players {
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assert_eq!(
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hypothetical_advantage(&connection, "test", 0.5, PlayerId(i), PlayerId(j))?,
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hypothetical_advantage(
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&connection,
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"test",
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PlayerId(i),
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PlayerId(j),
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metadata.set_limit,
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metadata.decay_rate,
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metadata.adj_decay_rate
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)?,
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0.0
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);
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}
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@ -690,8 +720,17 @@ CREATE TABLE IF NOT EXISTS datasets (
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insert_advantage(&connection, "test", PlayerId(1), PlayerId(2), 1.0)?;
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let metadata = metadata();
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assert_eq!(
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hypothetical_advantage(&connection, "test", 0.5, PlayerId(1), PlayerId(2))?,
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hypothetical_advantage(
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&connection,
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"test",
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PlayerId(1),
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PlayerId(2),
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metadata.set_limit,
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metadata.decay_rate,
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metadata.adj_decay_rate
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)?,
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1.0
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);
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