feat!: overhaul the entire rating algorithm

I am far, FAR too lazy to split this into multiple commits, so here it
is.

Cargo.toml

@@ -10,13 +10,13 @@ name = "startrnr"
 path = "src/main.rs"
 
 [dependencies]
+# GraphQL schema
+schema.path = "schema"
+
 # CLI
 clap = { version = "4.4", features = ["derive"] }
 chrono = "0.4"
 
-# GraphQL schema
-schema.path = "schema"
-
 # API access
 cynic = { version = "3.2", features = ["http-reqwest-blocking"] }
 reqwest = "0.11"

INSTALL.md

@@ -9,23 +9,25 @@ linked to your account. Instructions for generating one can be found in the
 Once you have an auth token, it must be provided to StartRNR. In order, the
 program checks for a token in:
 
-- A command-line flag `--auth`.
-- An environment variable `AUTH_TOKEN`,
-- A file `auth.txt` within the config directory (see the [README](README.md) for
-  a list of directories in each OS).
+1. A command-line flag `--auth`.
+2. An environment variable `AUTH_TOKEN`,
+3. A file `auth.txt` within the config directory:
+  - Windows: `%APPDATA%\Roaming\startrnr/auth.txt`
+  - MacOS: `~/Library/Application Support/startrnr/auth.txt`
+  - Linux: `~/.config/startrnr/auth.txt`
 
 The last method is recommended, as StartRNR can simply read from that file
 whenever it needs to.
 
 ## Step 2: Dependencies
 
-StartRNR is written in Rust, so install the [Rust
-toolchain](https://www.rust-lang.org/tools/install).
+StartRNR requires these dependencies:
 
-In addition, StartRNR needs these run-time dependencies:
+- [Rust](https://www.rust-lang.org/tools/install)
+- [OpenSSL](https://github.com/openssl/openssl#build-and-install)
+- [SQLite](https://www.sqlite.org/download.html)
 
-- [OpenSSL](https://www.openssl.org/)
-- [SQLite](https://www.sqlite.org/)
+Follow the instructions to download and install each.
 
 ## Step 3: Compiling
 

README.md

@@ -34,6 +34,8 @@ Alternatively, if you use Nix:
 nix profile install github:kiana-S/StartRNR
 ```
 
+You will need to provide a start.gg API token to access tournament data. Details can be found in [INSTALL.md](INSTALL.md).
+
 ## Usage
 
 Once StartRNR is installed, run:
@@ -58,17 +60,6 @@ startrnr player matchup <player1> <player2>
 A player can be specified by their tag or by their
 [discriminator](https://help.start.gg/en/articles/4855957-discriminators-on-start-gg).
 
-## Configuration
-
-StartRNR stores its rating databases in its config directory, which is located at:
-
-- Windows: `%APPDATA%\Roaming\startrnr`
-- MacOS: `~/Library/Application Support/startrnr`
-- Linux: `~/.config/startrnr`
-
-This directory can be used to store the authentication token, which is required
-for using StartRNR.
-
 ## Details - The RNR System
 
 *For more information on RNR, see the [details page](DETAILS.md).*

schema/startgg.graphql

@@ -207,6 +207,10 @@ enum StreamType {
 
   """
   MIXER
+  """
+
+  """
+  YOUTUBE
 }
 
 """
@@ -327,6 +331,14 @@ type Event {
   """
   deckSubmissionDeadline: Timestamp
   """
+  Maximum number of participants each Entrant can have
+  """
+  entrantSizeMax: Int @deprecated(reason: "Migrate to teamRosterSize")
+  """
+  Minimum number of participants each Entrant can have
+  """
+  entrantSizeMin: Int @deprecated(reason: "Migrate to teamRosterSize")
+  """
   The entrants that belong to an event, paginated by filter criteria
   """
   entrants(query: EventEntrantPageQuery): EntrantConnection
@@ -387,6 +399,10 @@ type Event {
   """
   rulesetId: Int
   """
+  Settings pulled from the event ruleset, if one exists
+  """
+  rulesetSettings: JSON @deprecated(reason: "Use ruleset")
+  """
   Paginated sets for this Event
   """
   sets(
@@ -523,6 +539,7 @@ type Entrant {
   Standing for this entrant given an event. All entrants queried must be in the same event (for now).
   """
   standing: Standing
+  stream: Streams @deprecated(reason: "DEPRECATED. Use streams instead, which supports multiple stream types and teams.")
   streams: [Streams]
   """
   Team linked to this entrant, if one exists
@@ -713,6 +730,10 @@ type Set {
   """
   phaseGroup: PhaseGroup
   """
+  The sets that are affected from resetting this set
+  """
+  resetAffectedData: ResetAffectedData
+  """
   The round number of the set. Negative numbers are losers bracket
   """
   round: Int
@@ -756,6 +777,14 @@ A game represents a single game within a set.
 """
 type Game {
   id: ID
+  """
+  Score of entrant 1. For smash, this is equivalent to stocks remaining.
+  """
+  entrant1Score: Int
+  """
+  Score of entrant 2. For smash, this is equivalent to stocks remaining.
+  """
+  entrant2Score: Int
   images(type: String): [Image]
   orderNum: Int
   """
@@ -786,6 +815,10 @@ type Image {
 A selection for this game. i.e. character/stage selection, etc
 """
 type GameSelection {
+  """
+  If this is a character selection, returns the selected character.
+  """
+  character: Character
   id: ID
   """
   The entrant who this selection is for
@@ -801,6 +834,18 @@ type GameSelection {
   selectionValue: Int
 }
 
+"""
+A character in a videogame
+"""
+type Character {
+  id: ID
+  images(type: String): [Image]
+  """
+  Name of Character
+  """
+  name: String
+}
+
 """
 A participant of a tournament; either a spectator or competitor
 """
@@ -913,6 +958,15 @@ type Player {
   """
   rankings(limit: Int, videogameId: ID): [PlayerRank]
   """
+  Recent sets for this player.
+  """
+  recentSets(
+    """
+    Use this to get H2H history between two players
+    """
+    opponentId: ID
+  ): [Set] @deprecated(reason: "Use the sets field instead.")
+  """
   Recent standings
   """
   recentStandings(
@@ -973,6 +1027,7 @@ type Standing {
   The player(s) tied to this standing's entity
   """
   player: Player
+  standing: Int @deprecated(reason: "The \"placement\" field is identical and will eventually replace \"standing\"")
   stats: StandingStats
   totalPoints: Float
 }
@@ -1243,6 +1298,10 @@ enum StreamSource {
   Stream is on a mixer.com channel
   """
   MIXER
+  """
+  Stream is on a youtube.com channel
+  """
+  YOUTUBE
 }
 
 input TeamPaginationQuery {
@@ -1356,6 +1415,8 @@ interface Team {
   Uniquely identifying token for team. Same as the hashed part of the slug
   """
   discriminator: String
+  entrant: Entrant @deprecated(reason: "Use the entrant field off the EventTeam type")
+  event: Event @deprecated(reason: "Use the event field off the EventTeam type")
   images(type: String): [Image]
   members(status: [TeamMemberStatus]): [TeamMember]
   name: String
@@ -1431,6 +1492,22 @@ type PhaseGroup {
   """
   firstRoundTime: Timestamp
   numRounds: Int
+  paginatedSeeds(query: SeedPaginationQuery!, eventId: ID): SeedConnection @deprecated(reason: "Please use 'seeds', which is now paginated")
+  """
+  Paginated sets on this phaseGroup
+  """
+  paginatedSets(
+    page: Int
+    perPage: Int
+    """
+    How to sort these sets
+    """
+    sortType: SetSortType
+    """
+    Supported filter options to filter down set results.
+    """
+    filters: SetFilters
+  ): SetConnection @deprecated(reason: "Please use 'sets', which is now paginated")
   """
   The phase associated with this phase group
   """
@@ -1612,6 +1689,7 @@ type Phase {
   The number of seeds this phase contains.
   """
   numSeeds: Int
+  paginatedSeeds(query: SeedPaginationQuery!, eventId: ID): SeedConnection @deprecated(reason: "Please use 'seeds' instead")
   """
   Phase groups under this phase, paginated
   """
@@ -1753,6 +1831,12 @@ type Stage {
   name: String
 }
 
+type ResetAffectedData {
+  affectedSetCount: Int
+  affectedSets: [Set]
+  affectedPhaseGroupCount: Int
+}
+
 """
 A slot in a set where a seed currently or will eventually exist in order to participate in the set.
 """
@@ -1810,6 +1894,10 @@ type League {
   """
   events(query: LeagueEventsQuery): EventConnection
   """
+  Hacked "progression" into this final event
+  """
+  finalEventId: Int @deprecated(reason: "No longer used")
+  """
   True if tournament has at least one offline event
   """
   hasOfflineEvents: Boolean
@@ -1828,6 +1916,10 @@ type League {
   The tournament name
   """
   name: String
+  """
+  Top X number of people in the standings who progress to final event
+  """
+  numProgressingToFinalEvent: Int @deprecated(reason: "No longer used")
   numUniquePlayers: Int
   postalCode: String
   primaryContact: String
@@ -1964,18 +2056,10 @@ type Videogame {
   images(type: String): [Image]
   name: String
   slug: String
-}
-
-"""
-A character in a videogame
-"""
-type Character {
-  id: ID
-  images(type: String): [Image]
   """
-  Name of Character
+  All stages for this videogame
   """
-  name: String
+  stages: [Stage]
 }
 
 input StandingPaginationQuery {
@@ -2296,6 +2380,32 @@ type Mutation {
   """
   deleteWave(waveId: ID!): Boolean
   """
+  Generate tournament registration Token on behalf of user
+  """
+  generateRegistrationToken(registration: TournamentRegistrationInput!, userId: ID!): String
+  """
+  Update a set to called state
+  """
+  markSetCalled(setId: ID!): Set
+  """
+  Update a set to called state
+  """
+  markSetInProgress(setId: ID!): Set
+  """
+  Register for tournament
+  """
+  registerForTournament(registration: TournamentRegistrationInput, registrationToken: String): Participant
+  """
+  Report set winner or game stats for a H2H bracket set. If winnerId is
+  supplied, mark set as complete. gameData parameter will overwrite any existing
+  reported game data.
+  """
+  reportBracketSet(setId: ID!, winnerId: ID, isDQ: Boolean, gameData: [BracketSetGameDataInput]): [Set]
+  """
+  Resets set to initial state, can affect other sets and phase groups
+  """
+  resetSet(setId: ID!, resetDependentSets: Boolean): Set
+  """
   Automatically attempt to resolve all schedule conflicts. Returns a list of changed seeds
   """
   resolveScheduleConflicts(tournamentId: ID!, options: ResolveConflictsOptions): [Seed]
@@ -2304,6 +2414,11 @@ type Mutation {
   """
   swapSeeds(phaseId: ID!, seed1Id: ID!, seed2Id: ID!): [Seed]
   """
+  Update game stats for a H2H bracket set. Set winner cannot be changed with
+  this function, use the resetSet mutation instead.
+  """
+  updateBracketSet(setId: ID!, winnerId: ID, isDQ: Boolean, gameData: [BracketSetGameDataInput]): Set
+  """
   Update set of phase groups in a phase
   """
   updatePhaseGroups(groupConfigs: [PhaseGroupUpdateInput]!): [PhaseGroup]
@@ -2325,6 +2440,54 @@ type Mutation {
   upsertWave(waveId: ID, tournamentId: ID, fields: WaveUpsertInput!): Wave
 }
 
+input TournamentRegistrationInput {
+  eventIds: [ID]
+}
+
+"""
+Game specific H2H set data such as character, stage, and stock info
+"""
+input BracketSetGameDataInput {
+  """
+  Entrant ID of game winner
+  """
+  winnerId: ID
+  """
+  Game number
+  """
+  gameNum: Int!
+  """
+  Score for entrant 1 (if applicable). For smash, this is stocks remaining.
+  """
+  entrant1Score: Int
+  """
+  Score for entrant 2 (if applicable). For smash, this is stocks remaining.
+  """
+  entrant2Score: Int
+  """
+  ID of the stage that was played for this game (if applicable)
+  """
+  stageId: ID
+  """
+  List of selections for the game, typically character selections.
+  """
+  selections: [BracketSetGameSelectionInput]
+}
+
+"""
+Game specific H2H selections made by the entrants, such as character info
+"""
+input BracketSetGameSelectionInput {
+  """
+  Entrant ID that made selection
+  """
+  entrantId: ID!
+  """
+  Character selected by this entrant for this game.
+  """
+  characterId: Int
+}
+
 input ResolveConflictsOptions {
   lockedSeeds: [ResolveConflictsLockedSeedConfig]
 }
@@ -2426,6 +2589,8 @@ type EventTeam implements Team {
   Uniquely identifying token for team. Same as the hashed part of the slug
   """
   discriminator: String
+  entrant: Entrant @deprecated(reason: "Use the entrant field off the EventTeam type")
+  event: Event @deprecated(reason: "Use the event field off the EventTeam type")
   globalTeam: GlobalTeam
   images(type: String): [Image]
   members(status: [TeamMemberStatus]): [TeamMember]
@@ -2441,6 +2606,8 @@ type GlobalTeam implements Team {
   Uniquely identifying token for team. Same as the hashed part of the slug
   """
   discriminator: String
+  entrant: Entrant @deprecated(reason: "Use the entrant field off the EventTeam type")
+  event: Event @deprecated(reason: "Use the event field off the EventTeam type")
   eventTeams(query: TeamPaginationQuery): EventTeamConnection
   images(type: String): [Image]
   """

src/database.rs

@@ -1,6 +1,5 @@
 use crate::queries::*;
 use sqlite::*;
-use std::fs::{self, OpenOptions};
 use std::path::{Path, PathBuf};
 
 pub struct DatasetMetadata {
@@ -14,17 +13,15 @@ pub struct DatasetMetadata {
     pub country: Option<String>,
     pub state: Option<String>,
 
-    pub set_limit: u64,
-    pub decay_rate: f64,
-    pub adj_decay_rate: f64,
-    pub period: f64,
-    pub tau: f64,
+    pub decay_const: f64,
+    pub var_const: f64,
 }
 
 /// Return the path to the datasets file.
-fn datasets_path(config_dir: &Path) -> std::io::Result<PathBuf> {
-    let mut path = config_dir.to_owned();
-    path.push("startrnr");
+fn datasets_path(dir: &Path) -> std::io::Result<PathBuf> {
+    use std::fs::{self, OpenOptions};
+
+    let mut path = dir.to_owned();
 
     // Create datasets path if it doesn't exist
     fs::create_dir_all(&path)?;
@@ -37,8 +34,8 @@ fn datasets_path(config_dir: &Path) -> std::io::Result<PathBuf> {
     Ok(path)
 }
 
-pub fn open_datasets(config_dir: &Path) -> sqlite::Result<Connection> {
-    let path = datasets_path(config_dir).unwrap();
+pub fn open_datasets(dir: &Path) -> sqlite::Result<Connection> {
+    let path = datasets_path(dir).unwrap();
 
     let query = "
 CREATE TABLE IF NOT EXISTS datasets (
@@ -51,11 +48,8 @@ CREATE TABLE IF NOT EXISTS datasets (
     game_slug TEXT NOT NULL,
     country TEXT,
     state TEXT,
-    set_limit INTEGER NOT NULL,
     decay_rate REAL NOT NULL,
-    adj_decay_rate REAL NOT NULL,
-    period REAL NOT NULL,
-    tau REAL NOT NULL
+    var_const REAL NOT NULL
 ) STRICT;
 
 CREATE TABLE IF NOT EXISTS players (
@@ -114,11 +108,8 @@ pub fn list_datasets(connection: &Connection) -> sqlite::Result<Vec<(String, Dat
                     game_slug: r_.read::<&str, _>("game_slug").to_owned(),
                     country: r_.read::<Option<&str>, _>("country").map(String::from),
                     state: r_.read::<Option<&str>, _>("state").map(String::from),
-                    set_limit: r_.read::<i64, _>("set_limit") as u64,
-                    decay_rate: r_.read::<f64, _>("decay_rate"),
-                    adj_decay_rate: r_.read::<f64, _>("adj_decay_rate"),
-                    period: r_.read::<f64, _>("period"),
-                    tau: r_.read::<f64, _>("tau"),
+                    decay_const: r_.read::<f64, _>("decay_rate"),
+                    var_const: r_.read::<f64, _>("adj_decay_rate"),
                 },
             ))
         })
@@ -158,17 +149,14 @@ pub fn new_dataset(
     dataset: &str,
     metadata: DatasetMetadata,
 ) -> sqlite::Result<()> {
-    let query1 = r#"INSERT INTO datasets VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)"#;
+    let query1 = r#"INSERT INTO datasets VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)"#;
     let query2 = format!(
         r#"CREATE TABLE "{0}_players" (
     id INTEGER PRIMARY KEY REFERENCES players,
-    last_played INTEGER NOT NULL,
-    deviation REAL NOT NULL,
-    volatility REAL NOT NULL,
 
-    sets_won TEXT NOT NULL,
+    sets_won TEXT NOT NULL DEFAULT '',
     sets_count_won INTEGER AS (length(sets_won) - length(replace(sets_won, ';', ''))),
-    sets_lost TEXT NOT NULL,
+    sets_lost TEXT NOT NULL DEFAULT '',
     sets_count_lost INTEGER AS (length(sets_lost) - length(replace(sets_lost, ';', ''))),
     sets TEXT AS (sets_won || sets_lost),
     sets_count INTEGER AS (sets_count_won + sets_count_lost)
@@ -178,10 +166,12 @@ CREATE TABLE "{0}_network" (
     player_A INTEGER NOT NULL,
     player_B INTEGER NOT NULL,
     advantage REAL NOT NULL,
+    variance REAL NOT NULL,
+    last_updated INTEGER NOT NULL,
 
-    sets_A TEXT NOT NULL,
+    sets_A TEXT NOT NULL DEFAULT '',
     sets_count_A INTEGER AS (length(sets_A) - length(replace(sets_A, ';', ''))),
-    sets_B TEXT NOT NULL,
+    sets_B TEXT NOT NULL DEFAULT '',
     sets_count_B INTEGER AS (length(sets_B) - length(replace(sets_B, ';', ''))),
     sets TEXT AS (sets_A || sets_B),
     sets_count INTEGER AS (sets_count_A + sets_count_B),
@@ -209,11 +199,8 @@ CREATE INDEX "{0}_network_B" ON "{0}_network" (player_B);"#,
         .bind((7, &metadata.game_slug[..]))?
         .bind((8, metadata.country.as_deref()))?
         .bind((9, metadata.state.as_deref()))?
-        .bind((10, metadata.set_limit as i64))?
-        .bind((11, metadata.decay_rate))?
-        .bind((12, metadata.adj_decay_rate))?
-        .bind((13, metadata.period))?
-        .bind((14, metadata.tau))?
+        .bind((10, metadata.decay_const))?
+        .bind((11, metadata.var_const))?
         .try_for_each(|x| x.map(|_| ()))?;
 
     connection.execute(query2)
@@ -243,11 +230,8 @@ pub fn get_metadata(
                 game_slug: r_.read::<&str, _>("game_slug").to_owned(),
                 country: r_.read::<Option<&str>, _>("country").map(String::from),
                 state: r_.read::<Option<&str>, _>("state").map(String::from),
-                set_limit: r_.read::<i64, _>("set_limit") as u64,
-                decay_rate: r_.read::<f64, _>("decay_rate"),
-                adj_decay_rate: r_.read::<f64, _>("adj_decay_rate"),
-                period: r_.read::<f64, _>("period"),
-                tau: r_.read::<f64, _>("tau"),
+                decay_const: r_.read::<f64, _>("decay_rate"),
+                var_const: r_.read::<f64, _>("var_const"),
             })
         })
         .and_then(Result::ok))
@@ -291,39 +275,46 @@ pub fn add_set(connection: &Connection, set: &SetId, event: EventId) -> sqlite::
 pub fn add_players(
     connection: &Connection,
     dataset: &str,
-    teams: &Teams<PlayerData>,
-    time: Timestamp,
+    players: &Vec<PlayerData>,
 ) -> sqlite::Result<()> {
     let query1 = "INSERT OR IGNORE INTO players (id, discrim, name, prefix) VALUES (?, ?, ?, ?)";
     let query2 = format!(
-        r#"INSERT OR IGNORE INTO "{}_players"
-            (id, last_played, deviation, volatility, sets_won, sets_lost)
-            VALUES (?, ?, 2.01, 0.06, '', '')"#,
+        r#"INSERT OR IGNORE INTO "{}_players" (id) VALUES (?)"#,
         dataset
     );
 
-    teams.iter().try_for_each(|team| {
-        team.iter().try_for_each(
-            |PlayerData {
-                 id,
-                 name,
-                 prefix,
-                 discrim,
-             }| {
-                let mut statement = connection.prepare(&query1)?;
-                statement.bind((1, id.0 as i64))?;
-                statement.bind((2, &discrim[..]))?;
-                statement.bind((3, &name[..]))?;
-                statement.bind((4, prefix.as_ref().map(|x| &x[..])))?;
-                statement.into_iter().try_for_each(|x| x.map(|_| ()))?;
+    players.iter().try_for_each(
+        |PlayerData {
+             id,
+             name,
+             prefix,
+             discrim,
+         }| {
+            let mut statement = connection.prepare(&query1)?;
+            statement.bind((1, id.0 as i64))?;
+            statement.bind((2, &discrim[..]))?;
+            statement.bind((3, &name[..]))?;
+            statement.bind((4, prefix.as_ref().map(|x| &x[..])))?;
+            statement.into_iter().try_for_each(|x| x.map(|_| ()))?;
 
-                statement = connection.prepare(&query2)?;
-                statement.bind((1, id.0 as i64))?;
-                statement.bind((2, time.0 as i64))?;
-                statement.into_iter().try_for_each(|x| x.map(|_| ()))
-            },
-        )
-    })
+            statement = connection.prepare(&query2)?;
+            statement.bind((1, id.0 as i64))?;
+            statement.into_iter().try_for_each(|x| x.map(|_| ()))
+        },
+    )
+}
+
+pub fn get_all_players(connection: &Connection, dataset: &str) -> sqlite::Result<Vec<PlayerId>> {
+    let query = format!(r#"SELECT id FROM "{}_players""#, dataset,);
+
+    connection
+        .prepare(&query)?
+        .into_iter()
+        .map(|r| {
+            let r_ = r?;
+            Ok(PlayerId(r_.read::<i64, _>("id") as u64))
+        })
+        .try_collect()
 }
 
 pub fn get_player(connection: &Connection, player: PlayerId) -> sqlite::Result<PlayerData> {
@@ -376,26 +367,6 @@ pub fn match_player_name(connection: &Connection, name: &str) -> sqlite::Result<
         .try_collect()
 }
 
-pub fn get_player_rating_data(
-    connection: &Connection,
-    dataset: &str,
-    player: PlayerId,
-) -> sqlite::Result<(f64, f64, Timestamp)> {
-    let query = format!(
-        r#"SELECT deviation, volatility, last_played FROM "{}_players" WHERE id = ?"#,
-        dataset
-    );
-
-    let mut statement = connection.prepare(&query)?;
-    statement.bind((1, player.0 as i64))?;
-    statement.next()?;
-    Ok((
-        statement.read::<f64, _>("deviation")?,
-        statement.read::<f64, _>("volatility")?,
-        Timestamp(statement.read::<i64, _>("last_played")? as u64),
-    ))
-}
-
 pub fn get_player_set_counts(
     connection: &Connection,
     dataset: &str,
@@ -437,27 +408,21 @@ pub fn get_matchup_set_counts(
     ))
 }
 
-pub fn set_player_data(
+pub fn set_player_set_counts(
     connection: &Connection,
     dataset: &str,
     player: PlayerId,
-    last_played: Timestamp,
-    deviation: f64,
-    volatility: f64,
     won: bool,
     set: &SetId,
 ) -> sqlite::Result<()> {
     let query = format!(
-        r#"UPDATE "{}_players" SET deviation = :dev, volatility = :vol, last_played = :last,
-            sets_won = iif(:won, sets_won || :set || ';', sets_won),
-            sets_lost = iif(:won, sets_lost, sets_lost || :set || ';') WHERE id = :id"#,
+        r#"UPDATE "{}_players" SET
+sets_won = iif(:won, sets_won || :set || ';', sets_won),
+sets_lost = iif(:won, sets_lost, sets_lost || :set || ';') WHERE id = :id"#,
         dataset
     );
 
     let mut statement = connection.prepare(&query)?;
-    statement.bind((":dev", deviation))?;
-    statement.bind((":vol", volatility))?;
-    statement.bind((":last", last_played.0 as i64))?;
     statement.bind((":id", player.0 as i64))?;
     statement.bind((":won", if won { 1 } else { 0 }))?;
     statement.bind((":set", &set.0.to_string()[..]))?;
@@ -465,18 +430,18 @@ pub fn set_player_data(
     Ok(())
 }
 
-pub fn get_advantage(
+pub fn get_network_data(
     connection: &Connection,
     dataset: &str,
     player1: PlayerId,
     player2: PlayerId,
-) -> sqlite::Result<Option<f64>> {
+) -> sqlite::Result<Option<(f64, f64)>> {
     if player1 == player2 {
-        return Ok(Some(0.0));
+        return Ok(Some((0.0, 0.0)));
     }
 
     let query = format!(
-        r#"SELECT iif(:a > :b, -advantage, advantage) AS advantage FROM "{}_network"
+        r#"SELECT iif(:a > :b, -advantage, advantage) AS advantage, variance FROM "{}_network"
             WHERE player_A = min(:a, :b) AND player_B = max(:a, :b)"#,
         dataset
     );
@@ -485,20 +450,24 @@ pub fn get_advantage(
     statement.bind((":a", player1.0 as i64))?;
     statement.bind((":b", player2.0 as i64))?;
     statement.next()?;
-    statement.read::<Option<f64>, _>("advantage")
+    Ok(statement
+        .read::<Option<f64>, _>("advantage")?
+        .zip(statement.read::<Option<f64>, _>("variance")?))
 }
 
-pub fn insert_advantage(
+pub fn insert_network_data(
     connection: &Connection,
     dataset: &str,
     player1: PlayerId,
     player2: PlayerId,
     advantage: f64,
+    variance: f64,
+    time: Timestamp,
 ) -> sqlite::Result<()> {
     let query = format!(
         r#"INSERT INTO "{}_network"
-            (player_A, player_B, advantage, sets_A, sets_B)
-            VALUES (min(:a, :b), max(:a, :b), iif(:a > :b, -:v, :v), '', '')"#,
+            (player_A, player_B, advantage, variance, last_updated)
+            VALUES (min(:a, :b), max(:a, :b), iif(:a > :b, -:v, :v), :d, :t)"#,
         dataset
     );
 
@@ -506,32 +475,67 @@ pub fn insert_advantage(
     statement.bind((":a", player1.0 as i64))?;
     statement.bind((":b", player2.0 as i64))?;
     statement.bind((":v", advantage))?;
+    statement.bind((":d", variance))?;
+    statement.bind((":t", time.0 as i64))?;
     statement.into_iter().try_for_each(|x| x.map(|_| ()))
 }
 
-pub fn adjust_advantages(
+pub fn adjust_for_time(
     connection: &Connection,
     dataset: &str,
-    set: SetId,
+    player: PlayerId,
+    var_const: f64,
+    time: Timestamp,
+) -> sqlite::Result<()> {
+    let query = format!(
+        r#"UPDATE "{0}_network" SET
+variance = min(variance + :c * (:t - last_updated), 5.0),
+last_updated = :t
+WHERE player_A = :i OR player_B = :i"#,
+        dataset
+    );
+
+    let mut statement = connection.prepare(query)?;
+    statement.bind((":i", player.0 as i64))?;
+    statement.bind((":c", var_const))?;
+    statement.bind((":t", time.0 as i64))?;
+    statement.into_iter().try_for_each(|x| x.map(|_| ()))
+}
+
+pub fn glicko_adjust(
+    connection: &Connection,
+    dataset: &str,
+    set: &SetId,
     player1: PlayerId,
     player2: PlayerId,
+    advantage: f64,
+    variance: f64,
     winner: usize,
-    adjust1: f64,
-    adjust2: f64,
     decay_rate: f64,
 ) -> sqlite::Result<()> {
+    let score = if winner != 0 { 1.0 } else { 0.0 };
+
+    let exp_val = 1.0 / (1.0 + (-advantage).exp());
+
+    let like_var = 1.0 / exp_val / (1.0 - exp_val);
+    let var_new = 1.0 / (1.0 / variance + 1.0 / like_var);
+    let adjust = score - exp_val;
+
     let query1 = format!(
-        r#"UPDATE "{}_network"
-SET advantage = advantage + iif(:pl = player_A, -:v, :v) * :d
+        r#"UPDATE "{}_network" SET
+variance = 1.0 / (1.0 / variance + :d / :lv),
+advantage = advantage + :d * iif(:pl = player_A, -:adj, :adj)
+            / (1.0 / variance + :d / :lv)
 WHERE (player_A = :pl AND player_B != :plo)
     OR (player_B = :pl AND player_A != :plo)"#,
         dataset
     );
     let query2 = format!(
-        r#"UPDATE "{}_network"
-SET advantage = advantage + iif(:a > :b, -:v, :v),
-    sets_A = iif(:w = (:a > :b), sets_A || :set || ';', sets_A),
-    sets_B = iif(:w = (:b > :a), sets_B || :set || ';', sets_B)
+        r#"UPDATE "{}_network" SET
+variance = :var,
+advantage = advantage + iif(:a > :b, -:adj, :adj) * :var,
+sets_A = iif(:w = (:a > :b), sets_A || :set || ';', sets_A),
+sets_B = iif(:w = (:b > :a), sets_B || :set || ';', sets_B)
 WHERE player_A = min(:a, :b) AND player_B = max(:a, :b)"#,
         dataset
     );
@@ -539,21 +543,24 @@ WHERE player_A = min(:a, :b) AND player_B = max(:a, :b)"#,
     let mut statement = connection.prepare(&query1)?;
     statement.bind((":pl", player1.0 as i64))?;
     statement.bind((":plo", player2.0 as i64))?;
-    statement.bind((":v", adjust1))?;
+    statement.bind((":adj", -0.5 * adjust))?;
     statement.bind((":d", decay_rate))?;
+    statement.bind((":lv", like_var))?;
     statement.into_iter().try_for_each(|x| x.map(|_| ()))?;
 
     statement = connection.prepare(&query1)?;
     statement.bind((":pl", player2.0 as i64))?;
     statement.bind((":plo", player1.0 as i64))?;
-    statement.bind((":v", adjust2))?;
+    statement.bind((":adj", 0.5 * adjust))?;
     statement.bind((":d", decay_rate))?;
+    statement.bind((":lv", like_var))?;
     statement.into_iter().try_for_each(|x| x.map(|_| ()))?;
 
     statement = connection.prepare(&query2)?;
     statement.bind((":a", player1.0 as i64))?;
     statement.bind((":b", player2.0 as i64))?;
-    statement.bind((":v", adjust2 - adjust1))?;
+    statement.bind((":adj", adjust))?;
+    statement.bind((":var", var_new))?;
     statement.bind((":w", winner as i64))?;
     statement.bind((":set", &set.0.to_string()[..]))?;
     statement.into_iter().try_for_each(|x| x.map(|_| ()))
@@ -563,11 +570,11 @@ pub fn get_edges(
     connection: &Connection,
     dataset: &str,
     player: PlayerId,
-) -> sqlite::Result<Vec<(PlayerId, f64, u64)>> {
+) -> sqlite::Result<Vec<(PlayerId, f64, f64)>> {
     let query = format!(
         r#"SELECT
     iif(:pl = player_B, player_A, player_B) AS id,
-    iif(:pl = player_B, -advantage, advantage) AS advantage, sets_count
+    iif(:pl = player_B, -advantage, advantage) AS advantage, variance
     FROM "{}_network"
     WHERE player_A = :pl OR player_B = :pl"#,
         dataset
@@ -582,7 +589,7 @@ pub fn get_edges(
             Ok((
                 PlayerId(r_.read::<i64, _>("id") as u64),
                 r_.read::<f64, _>("advantage"),
-                r_.read::<i64, _>("sets_count") as u64,
+                r_.read::<f64, _>("variance"),
             ))
         })
         .try_collect()
@@ -617,20 +624,20 @@ pub fn hypothetical_advantage(
     dataset: &str,
     player1: PlayerId,
     player2: PlayerId,
-    set_limit: u64,
     decay_rate: f64,
-    adj_decay_rate: f64,
-) -> sqlite::Result<f64> {
+) -> sqlite::Result<(f64, f64)> {
     use std::collections::{HashSet, VecDeque};
 
     // Check trivial cases
-    if player1 == player2 || either_isolated(connection, dataset, player1, player2)? {
-        return Ok(0.0);
+    if player1 == player2 {
+        return Ok((0.0, 0.0));
+    } else if decay_rate < 0.05 || either_isolated(connection, dataset, player1, player2)? {
+        return Ok((0.0, 5.0));
     }
 
     let mut visited: HashSet<PlayerId> = HashSet::new();
-    let mut queue: VecDeque<(PlayerId, Vec<(f64, f64)>)> =
-        VecDeque::from([(player1, Vec::from([(0.0, 1.0)]))]);
+    let mut queue: VecDeque<(PlayerId, Vec<(f64, f64, f64)>)> =
+        VecDeque::from([(player1, Vec::from([(0.0, 0.0, 1.0 / decay_rate)]))]);
 
     let mut final_paths = Vec::new();
 
@@ -639,7 +646,7 @@ pub fn hypothetical_advantage(
 
         let connections = get_edges(connection, dataset, visiting)?;
 
-        for (id, adv, sets) in connections
+        for (id, adv, var) in connections
             .into_iter()
             .filter(|(id, _, _)| !visited.contains(id))
         {
@@ -653,12 +660,9 @@ pub fn hypothetical_advantage(
             };
 
             if rf.len() < 100 {
-                let decay = if sets >= set_limit {
-                    decay_rate
-                } else {
-                    adj_decay_rate
-                };
-                let iter = paths.iter().map(|(a, d)| (a + adv, d * decay));
+                let iter = paths
+                    .iter()
+                    .map(|(av, vr, dec)| (av + adv, vr + var, dec * decay_rate));
 
                 rf.extend(iter);
                 rf.truncate(100);
@@ -668,22 +672,23 @@ pub fn hypothetical_advantage(
         visited.insert(visiting);
     }
 
-    let max_decay = final_paths
-        .iter()
-        .map(|x| x.1)
-        .max_by(|d1, d2| d1.partial_cmp(d2).unwrap());
-
-    if let Some(mdec) = max_decay {
-        let sum_decay = final_paths.iter().map(|x| x.1).sum::<f64>();
-        Ok(final_paths
-            .into_iter()
-            .map(|(adv, dec)| adv * dec)
-            .sum::<f64>()
-            / sum_decay
-            * mdec)
-    } else {
+    if final_paths.len() == 0 {
         // No paths found
-        Ok(0.0)
+        Ok((0.0, 5.0))
+    } else {
+        let sum_decay: f64 = final_paths.iter().map(|(_, _, dec)| dec).sum();
+        let (final_adv, final_var) = final_paths
+            .into_iter()
+            .fold((0.0, 0.0), |(av, vr), (adv, var, dec)| {
+                (av + adv * dec, vr + (var + adv * adv) * dec)
+            });
+        let mut final_adv = final_adv / sum_decay;
+        let mut final_var = final_var / sum_decay - final_adv * final_adv;
+        if final_var > 5.0 {
+            final_adv = final_adv * (5.0 / final_var).sqrt();
+            final_var = 5.0;
+        }
+        Ok((final_adv, final_var))
     }
 }
 
@@ -692,21 +697,12 @@ pub fn initialize_edge(
     dataset: &str,
     player1: PlayerId,
     player2: PlayerId,
-    set_limit: u64,
     decay_rate: f64,
-    adj_decay_rate: f64,
-) -> sqlite::Result<f64> {
-    let adv = hypothetical_advantage(
-        connection,
-        dataset,
-        player1,
-        player2,
-        set_limit,
-        decay_rate,
-        adj_decay_rate,
-    )?;
-    insert_advantage(connection, dataset, player1, player2, adv)?;
-    Ok(adv)
+    time: Timestamp,
+) -> sqlite::Result<(f64, f64)> {
+    let (adv, var) = hypothetical_advantage(connection, dataset, player1, player2, decay_rate)?;
+    insert_network_data(connection, dataset, player1, player2, adv, var, time)?;
+    Ok((adv, var))
 }
 
 // Tests
@@ -730,8 +726,7 @@ CREATE TABLE IF NOT EXISTS datasets (
     set_limit INTEGER NOT NULL,
     decay_rate REAL NOT NULL,
     adj_decay_rate REAL NOT NULL,
-    period REAL NOT NULL,
-    tau REAL NOT NULL
+    var_const
 ) STRICT;
 
 CREATE TABLE IF NOT EXISTS players (
@@ -770,11 +765,8 @@ CREATE TABLE IF NOT EXISTS sets (
             game_slug: String::from("test"),
             country: None,
             state: None,
-            set_limit: 0,
-            decay_rate: 0.5,
-            adj_decay_rate: 0.5,
-            period: (3600 * 24 * 30) as f64,
-            tau: 0.2,
+            decay_const: 0.5,
+            var_const: 0.00000001,
         }
     }
 
@@ -788,141 +780,4 @@ CREATE TABLE IF NOT EXISTS sets (
             })
             .collect()
     }
-
-    #[test]
-    fn sqlite_sanity_check() -> sqlite::Result<()> {
-        let test_value: i64 = 2;
-
-        let connection = sqlite::open(":memory:")?;
-        connection.execute(
-            r#"CREATE TABLE test (a INTEGER);
-            INSERT INTO test VALUES (1);
-            INSERT INTO test VALUES (2)"#,
-        )?;
-
-        let mut statement = connection.prepare("SELECT * FROM test WHERE a = ?")?;
-        statement.bind((1, test_value))?;
-        statement.next()?;
-        assert_eq!(statement.read::<i64, _>("a")?, test_value);
-        Ok(())
-    }
-
-    #[test]
-    fn test_players() -> sqlite::Result<()> {
-        let connection = mock_datasets()?;
-        new_dataset(&connection, "test", metadata())?;
-
-        add_players(&connection, "test", &vec![players(2)], Timestamp(0))?;
-
-        let mut statement = connection.prepare("SELECT * FROM players WHERE id = 1")?;
-        statement.next()?;
-        assert_eq!(statement.read::<i64, _>("id")?, 1);
-        assert_eq!(statement.read::<String, _>("name")?, "1");
-        assert_eq!(statement.read::<Option<String>, _>("prefix")?, None);
-
-        Ok(())
-    }
-
-    #[test]
-    fn edge_insert_get() -> sqlite::Result<()> {
-        let connection = mock_datasets()?;
-        new_dataset(&connection, "test", metadata())?;
-        add_players(&connection, "test", &vec![players(2)], Timestamp(0))?;
-
-        insert_advantage(&connection, "test", PlayerId(2), PlayerId(1), 1.0)?;
-
-        assert_eq!(
-            get_advantage(&connection, "test", PlayerId(1), PlayerId(2))?,
-            Some(-1.0)
-        );
-        assert_eq!(
-            get_advantage(&connection, "test", PlayerId(2), PlayerId(1))?,
-            Some(1.0)
-        );
-
-        Ok(())
-    }
-
-    #[test]
-    fn player_all_edges() -> sqlite::Result<()> {
-        let connection = mock_datasets()?;
-        new_dataset(&connection, "test", metadata())?;
-        add_players(&connection, "test", &vec![players(3)], Timestamp(0))?;
-
-        insert_advantage(&connection, "test", PlayerId(2), PlayerId(1), 1.0)?;
-        insert_advantage(&connection, "test", PlayerId(1), PlayerId(3), 5.0)?;
-
-        assert_eq!(
-            get_edges(&connection, "test", PlayerId(1))?,
-            [(PlayerId(2), -1.0, 0), (PlayerId(3), 5.0, 0)]
-        );
-        assert_eq!(
-            get_edges(&connection, "test", PlayerId(2))?,
-            [(PlayerId(1), 1.0, 0)]
-        );
-        assert_eq!(
-            get_edges(&connection, "test", PlayerId(3))?,
-            [(PlayerId(1), -5.0, 0)]
-        );
-        Ok(())
-    }
-
-    #[test]
-    fn hypoth_adv_trivial() -> sqlite::Result<()> {
-        let num_players = 3;
-
-        let connection = mock_datasets()?;
-        new_dataset(&connection, "test", metadata())?;
-        add_players(
-            &connection,
-            "test",
-            &vec![players(num_players)],
-            Timestamp(0),
-        )?;
-
-        let metadata = metadata();
-        for i in 1..=num_players {
-            for j in 1..=num_players {
-                assert_eq!(
-                    hypothetical_advantage(
-                        &connection,
-                        "test",
-                        PlayerId(i),
-                        PlayerId(j),
-                        metadata.set_limit,
-                        metadata.decay_rate,
-                        metadata.adj_decay_rate
-                    )?,
-                    0.0
-                );
-            }
-        }
-
-        Ok(())
-    }
-
-    #[test]
-    fn hypoth_adv1() -> sqlite::Result<()> {
-        let connection = mock_datasets()?;
-        new_dataset(&connection, "test", metadata())?;
-        add_players(&connection, "test", &vec![players(2)], Timestamp(0))?;
-
-        insert_advantage(&connection, "test", PlayerId(1), PlayerId(2), 1.0)?;
-
-        let metadata = metadata();
-        assert_eq!(
-            hypothetical_advantage(
-                &connection,
-                "test",
-                PlayerId(1),
-                PlayerId(2),
-                metadata.set_limit,
-                metadata.decay_rate,
-                metadata.adj_decay_rate
-            )?,
-            1.0
-        );
-
-        Ok(())
-    }
 }

src/main.rs

@@ -45,9 +45,7 @@ AUTH_TOKEN, or in a text file '<CONFIG_DIR>/auth.txt'."
         value_name = "DIR",
         global = true,
         help = "Config directory",
-        long_help = "This flag overrides the default config directory.
-If this directory does not exist, it will be created and a database file will
-be initialized within it."
+        long_help = "This flag overrides the default config directory."
     )]
     config_dir: Option<PathBuf>,
 }
@@ -83,6 +81,12 @@ created if it does not already exist."
         #[arg(short, long, global = true, help = "The dataset to access")]
         dataset: Option<String>,
     },
+    Ranking {
+        #[command(subcommand)]
+        subcommand: RankingSC,
+        #[arg(short, long, global = true, help = "The dataset to access")]
+        dataset: Option<String>,
+    },
 }
 
 #[derive(Subcommand)]
@@ -108,15 +112,28 @@ enum PlayerSC {
     Matchup { player1: String, player2: String },
 }
 
+#[derive(Subcommand)]
+enum RankingSC {
+    #[command(about = "Create a new ranking")]
+    Create,
+}
+
 fn main() {
     let cli = Cli::parse();
 
-    let config_dir = cli
-        .config_dir
-        .unwrap_or_else(|| dirs::config_dir().expect("Could not determine config directory"));
-    let connection =
-        open_datasets(&config_dir).unwrap_or_else(|_| error("Could not open datasets file", 2));
+    let config_dir = cli.config_dir.unwrap_or_else(|| {
+        let mut dir = dirs::config_dir().expect("Could not determine config directory");
+        dir.push("startrnr");
+        dir
+    });
 
+    let mut data_dir = dirs::data_dir().expect("Could not determine user data directory");
+    data_dir.push("startrnr");
+
+    let connection =
+        open_datasets(&data_dir).unwrap_or_else(|_| error("Could not open datasets file", 2));
+
+    #[allow(unreachable_patterns)]
     match cli.subcommand {
         Subcommands::Dataset {
             subcommand: DatasetSC::List,
@@ -220,22 +237,10 @@ fn dataset_list(connection: &Connection) {
                 );
             }
         }
-        println!();
-
-        if metadata.set_limit != 0 && metadata.decay_rate != metadata.adj_decay_rate {
-            println!("\x1b[1mSet Limit:\x1b[0m {}", metadata.set_limit);
-            println!(
-                "\x1b[1mNetwork Decay Rate:\x1b[0m {} (adjusted {})",
-                metadata.decay_rate, metadata.adj_decay_rate
-            );
-        } else {
-            println!("\x1b[1mNetwork Decay Rate:\x1b[0m {}", metadata.decay_rate);
-        }
         println!(
-            "\x1b[1mRating Period:\x1b[0m {} days",
-            metadata.period / SECS_IN_DAY as f64
+            "\n\x1b[1mNetwork Decay Constant:\x1b[0m {}",
+            metadata.decay_const
         );
-        println!("\x1b[1mTau Constant:\x1b[0m {}\n", metadata.tau);
     }
 }
 
@@ -395,33 +400,11 @@ End date (year, m/y, or m/d/y): "
         }
     };
 
-    // Set Limit
-
-    let mut set_limit = 0;
-    print!(
-        "
-\x1b[1mSet Limit\x1b[0m
-The set limit is an optional feature of the rating system that defines how many
-sets must be played between two players for their rating data to be considered
-trustworthy.
-This value should be set low, i.e. not more than 5 or 6.
-
-Set limit (default 0): "
-    );
-    let set_limit_input = read_string();
-    if !set_limit_input.is_empty() {
-        set_limit = set_limit_input
-            .parse::<u64>()
-            .unwrap_or_else(|_| error("Input is not an integer", 1));
-    }
-
     // Advanced Options
 
     // Defaults
-    let mut decay_rate = 0.8;
-    let mut adj_decay_rate = 0.6;
-    let mut period_days = 40.0;
-    let mut tau = 0.4;
+    let mut decay_const = 0.9;
+    let mut var_const = (10.0 - 0.04) / SECS_IN_YEAR as f64 / 3.0;
 
     print!("\nConfigure advanced options? (y/n) ");
     if let Some('y') = read_string().chars().next() {
@@ -429,87 +412,42 @@ Set limit (default 0): "
 
         print!(
             "
-\x1b[1mNetwork Decay Rate\x1b[0m
-The network decay rate is a number between 0 and 1 that controls how the
-advantage network reacts to player wins and losses. If the decay rate is 1,
-then it is assumed that a player's skill against one opponent always carries
-over to all other opponents. If the decay rate is 0, then all player match-ups
-are assumed to be independent of each other.
+\x1b[1mNetwork Decay Constant\x1b[0m
+The network decay constant is a number between 0 and 1 that controls how
+player wins and losses propagate throughout the network. If the decay
+constant is 1, then it is assumed that a player's skill against one
+opponent always carries over to all other opponents. If the decay
+constant is 0, then all player match-ups are assumed to be independent of
+each other.
 
-Network decay rate (default 0.8): "
+Network decay constant (default 0.9): "
         );
-        let decay_rate_input = read_string();
-        if !decay_rate_input.is_empty() {
-            decay_rate = decay_rate_input
+        let decay_const_input = read_string();
+        if !decay_const_input.is_empty() {
+            decay_const = decay_const_input
                 .parse::<f64>()
                 .unwrap_or_else(|_| error("Input is not a number", 1));
-            if decay_rate < 0.0 || decay_rate > 1.0 {
+            if decay_const < 0.0 || decay_const > 1.0 {
                 error("Input is not between 0 and 1", 1);
             }
         }
 
-        // Adjusted Decay Rate
-
-        if set_limit != 0 {
-            print!(
-                "
-\x1b[1mAdjusted Network Decay Rate\x1b[0m
-If the number of sets played between two players is less than the set limit,
-then this value is used instead of the regular network decay rate.
-This value should be \x1b[1mlower\x1b[0m than the network decay rate.
-
-Adjusted network decay rate (default 0.6): "
-            );
-            let adj_decay_rate_input = read_string();
-            if !adj_decay_rate_input.is_empty() {
-                adj_decay_rate = adj_decay_rate_input
-                    .parse::<f64>()
-                    .unwrap_or_else(|_| error("Input is not a number", 1));
-                if decay_rate < 0.0 || decay_rate > 1.0 {
-                    error("Input is not between 0 and 1", 1);
-                }
-            }
-        }
-
-        // Rating Period
+        // Variance Constant
 
         print!(
             "
-\x1b[1mRating Period\x1b[0m
-The rating period is an interval of time that dictates how player ratings change
-during inactivity. Ideally the rating period should be somewhat long, long
-enough to expect almost every player in the dataset to have played at least a
-few sets.
+\x1b[1mVariance Rate\x1b[0m
+This constant determines how quickly a player's variance (the uncertainty
+of their rating) increases over time. See the end of \x1b[4m\x1b]8;;http:\
+//www.glicko.net/glicko/glicko.pdf\x1b\\this paper\x1b]8;;\x1b\\\x1b[0m for details
+on how to compute a good value, or you can leave it blank and a reasonable
+default will be chosen.
 
-Rating period (in days, default 40): "
+Variance rate: "
         );
-        let period_input = read_string();
-        if !period_input.is_empty() {
-            period_days = period_input
-                .parse::<f64>()
-                .unwrap_or_else(|_| error("Input is not a number", 1));
-        }
-
-        // Tau coefficient
-
-        print!(
-            "
-\x1b[1mTau Constant\x1b[0m
-The tau constant is an internal system constant that roughly represents how
-much random chance and luck play a role in game outcomes. In games where match
-results are highly predictable, and a player's skill is the sole factor for
-whether they will win, the tau constant should be high (0.9 - 1.2). In games
-where luck matters, and more improbable victories can occur, the tau constant
-should be low (0.2 - 0.4).
-
-The tau constant is set low by default, since skill-based competitive video
-games tend to be on the more luck-heavy side.
-
-Tau constant (default 0.4): "
-        );
-        let tau_input = read_string();
-        if !tau_input.is_empty() {
-            tau = tau_input
+        let var_const_input = read_string();
+        if !var_const_input.is_empty() {
+            var_const = var_const_input
                 .parse::<f64>()
                 .unwrap_or_else(|_| error("Input is not a number", 1));
         }
@@ -529,11 +467,8 @@ Tau constant (default 0.4): "
             game_slug,
             country,
             state,
-            set_limit,
-            decay_rate,
-            adj_decay_rate,
-            period: SECS_IN_DAY as f64 * period_days,
-            tau,
+            decay_const,
+            var_const,
         },
     )
     .expect("Error communicating with SQLite");
@@ -587,9 +522,6 @@ fn player_info(connection: &Connection, dataset: Option<String>, player: String)
     } = get_player_from_input(connection, player)
         .unwrap_or_else(|_| error("Could not find player", 1));
 
-    let (deviation, volatility, _) = get_player_rating_data(connection, &dataset, id)
-        .unwrap_or_else(|_| error("Could not find player", 1));
-
     let (won, lost) = get_player_set_counts(connection, &dataset, id)
         .unwrap_or_else(|_| error("Could not find player", 1));
 
@@ -609,9 +541,6 @@ fn player_info(connection: &Connection, dataset: Option<String>, player: String)
         lost,
         (won as f64 / (won + lost) as f64) * 100.0
     );
-
-    println!("\n\x1b[1mDeviation:\x1b[0m {}", deviation);
-    println!("\x1b[1mVolatility:\x1b[0m {}", volatility);
 }
 
 fn player_matchup(
@@ -630,9 +559,6 @@ fn player_matchup(
     } = get_player_from_input(connection, player1)
         .unwrap_or_else(|_| error("Could not find player", 1));
 
-    let (deviation1, _, _) = get_player_rating_data(connection, &dataset, player1)
-        .unwrap_or_else(|_| error("Could not find player", 1));
-
     let PlayerData {
         id: player2,
         name: name2,
@@ -641,43 +567,34 @@ fn player_matchup(
     } = get_player_from_input(connection, player2)
         .unwrap_or_else(|_| error("Could not find player", 1));
 
-    let (deviation2, _, _) = get_player_rating_data(connection, &dataset, player2)
-        .unwrap_or_else(|_| error("Could not find player", 1));
-
-    let (hypothetical, advantage) = get_advantage(connection, &dataset, player1, player2)
-        .expect("Error communicating with SQLite")
-        .map(|x| (false, x))
-        .unwrap_or_else(|| {
-            let metadata = get_metadata(connection, &dataset)
-                .expect("Error communicating with SQLite")
-                .unwrap_or_else(|| error("Dataset not found", 1));
-            (
-                true,
-                hypothetical_advantage(
+    let (hypothetical, advantage, variance) =
+        get_network_data(connection, &dataset, player1, player2)
+            .expect("Error communicating with SQLite")
+            .map(|(adv, var)| (false, adv, var))
+            .unwrap_or_else(|| {
+                let metadata = get_metadata(connection, &dataset)
+                    .expect("Error communicating with SQLite")
+                    .unwrap_or_else(|| error("Dataset not found", 1));
+                let (adv, var) = hypothetical_advantage(
                     connection,
                     &dataset,
                     player1,
                     player2,
-                    metadata.set_limit,
-                    metadata.decay_rate,
-                    metadata.adj_decay_rate,
+                    metadata.decay_const,
                 )
-                .expect("Error communicating with SQLite"),
-            )
-        });
+                .expect("Error communicating with SQLite");
+                (true, adv, var)
+            });
 
-    let probability = 1.0
-        / (1.0
-            + f64::exp(
-                g_func((deviation1 * deviation1 + deviation2 * deviation2).sqrt()) * advantage,
-            ));
+    let probability = 1.0 / (1.0 + f64::exp(-advantage));
 
-    let color = ansi_num_color(advantage, 0.2, 2.0);
-    let other_color = ansi_num_color(-advantage, 0.2, 2.0);
+    let (color, other_color) = ansi_num_color(advantage, 0.2, 2.0);
 
     let len1 = prefix1.as_deref().map(|s| s.len() + 1).unwrap_or(0) + name1.len();
     let len2 = prefix2.as_deref().map(|s| s.len() + 1).unwrap_or(0) + name2.len();
 
+    // Prefix + name for each player
+
     if let Some(pre) = prefix1 {
         print!("\x1b[2m{}\x1b[22m ", pre);
     }
@@ -695,26 +612,30 @@ fn player_matchup(
         discrim2, name2
     );
 
+    // Probability breakdown
+
     println!(
         "\x1b[1m\x1b[{4}m{0:>2$}\x1b[0m - \x1b[1m\x1b[{5}m{1:<3$}\x1b[0m",
-        format!("{:.1}%", probability * 100.0),
         format!("{:.1}%", (1.0 - probability) * 100.0),
+        format!("{:.1}%", probability * 100.0),
         len1,
         len2,
         other_color,
         color
     );
 
-    if hypothetical {
-        println!(
-            "\n\x1b[1mHypothetical Advantage: \x1b[{1}m{0:+.4}\x1b[0m",
-            advantage, color
-        );
-    } else {
-        println!(
-            "\n\x1b[1mAdvantage: \x1b[{1}m{0:+.4}\x1b[0m",
-            advantage, color
-        );
+    // Advantage + variance
+
+    println!(
+        "\n\x1b[1m{0}Advantage: \x1b[{1}m{2:+.4}\x1b[39m\n{0}Variance: {3:.4}\x1b[0m",
+        if hypothetical { "Hypothetical " } else { "" },
+        color,
+        advantage,
+        variance
+    );
+
+    if !hypothetical {
+        // Set count
 
         let (a, b) = get_matchup_set_counts(connection, &dataset, player1, player2)
             .expect("Error communicating with SQLite");
@@ -774,5 +695,70 @@ fn sync(connection: &Connection, auth: String, datasets: Vec<String>, all: bool)
 }
 
 fn ranking_create(connection: &Connection, dataset: Option<String>) {
+    use std::collections::HashMap;
+
     let dataset = dataset.unwrap_or_else(|| String::from("default"));
+
+    let metadata = get_metadata(connection, &dataset)
+        .expect("Error communicating with SQLite")
+        .unwrap_or_else(|| error("Dataset not found", 1));
+
+    let exp = read_string().parse::<f64>().unwrap();
+
+    let players = get_all_players(connection, &dataset).expect("Error communicating with SQLite");
+    let num_players = players.len();
+    let mut table = players
+        .into_iter()
+        .map(|id| (id, 1.0 / num_players as f64))
+        .collect::<HashMap<_, _>>();
+    table.shrink_to_fit();
+
+    let mut diff: f64 = 1.0;
+    let mut iter = 0;
+
+    while diff > 1e-8 {
+        let mut new_table = HashMap::with_capacity(table.capacity());
+
+        for (&id, &last) in table.iter() {
+            let mut points = get_edges(connection, &dataset, id)
+                .expect("Error communicating with SQLite")
+                .into_iter()
+                .map(|(other, adv, _sets)| (other, exp.powf(adv)))
+                .collect::<Vec<_>>();
+
+            points.push((id, 1.0));
+
+            let sum_points = points.iter().map(|(_, val)| val).sum::<f64>();
+
+            points.into_iter().for_each(|(other, pts)| {
+                let pts_ = last * pts / sum_points;
+                new_table
+                    .entry(other)
+                    .and_modify(|v| *v += pts_)
+                    .or_insert(pts_);
+            })
+        }
+
+        if iter % 10 == 0 {
+            diff = (table
+                .iter()
+                .map(|(id, &last)| (new_table[id] - last) * (new_table[id] - last))
+                .sum::<f64>()
+                / num_players as f64)
+                .sqrt();
+            println!("{}", diff);
+        }
+
+        table = new_table;
+        iter += 1;
+    }
+
+    let mut list = table.into_iter().collect::<Vec<_>>();
+    list.sort_by(|(_, a), (_, b)| b.partial_cmp(a).unwrap());
+
+    println!();
+    for (id, pts) in list.into_iter().take(20) {
+        let player = get_player(connection, id).unwrap();
+        println!("{} - {}", player.name, pts);
+    }
 }

src/queries.rs

@@ -28,7 +28,6 @@ pub fn get_auth_token(config_dir: &Path) -> String {
         Err(VarError::NotUnicode(_)) => error("Invalid authorization key", 2),
         Err(VarError::NotPresent) => {
             let mut auth_file = config_dir.to_owned();
-            auth_file.push("startrnr");
             auth_file.push("auth.txt");
             read_to_string(auth_file)
                 .ok()

src/sync.rs

@@ -1,4 +1,3 @@
-use std::f64::consts::PI;
 use std::thread::sleep;
 use std::time::Duration;
 
@@ -8,86 +7,6 @@ use crate::queries::*;
 use itertools::Itertools;
 use sqlite::*;
 
-// Glicko-2 system calculation
-
-pub fn g_func(dev: f64) -> f64 {
-    1.0 / (1.0 + 3.0 * dev * dev / PI / PI).sqrt()
-}
-
-fn time_adjust(periods: f64, old_dev_sq: f64, volatility: f64) -> f64 {
-    (old_dev_sq + periods * volatility * volatility).sqrt()
-}
-
-fn illinois_optimize(fun: impl Fn(f64) -> f64, mut a: f64, mut b: f64) -> f64 {
-    let mut f_a = fun(a);
-    let mut f_b = fun(b);
-
-    while (b - a).abs() > 1e-6 {
-        let c = a + (a - b) * f_a / (f_b - f_a);
-        let f_c = fun(c);
-        if f_c * f_b > 0.0 {
-            f_a = f_a / 2.0;
-        } else {
-            a = b;
-            f_a = f_b;
-        }
-        b = c;
-        f_b = f_c;
-    }
-    a
-}
-
-fn glicko_adjust(
-    advantage: f64,
-    deviation: f64,
-    volatility: f64,
-    other_deviation: f64,
-    won: bool,
-    time: u64,
-    metadata: &DatasetMetadata,
-) -> (f64, f64, f64) {
-    let period = metadata.period;
-    let tau = metadata.tau;
-
-    let g_val = g_func(other_deviation);
-    let exp_val = 1.0 / (1.0 + f64::exp(-g_val * advantage));
-
-    let variance = 1.0 / (g_val * g_val * exp_val * (1.0 - exp_val));
-
-    let score = if won { 1.0 } else { 0.0 };
-    let delta = variance * g_val * (score - exp_val);
-
-    let delta_sq = delta * delta;
-    let dev_sq = deviation * deviation;
-    let a = (volatility * volatility).ln();
-    let vol_fn = |x| {
-        let ex = f64::exp(x);
-        let subf = dev_sq + variance + ex;
-        ((ex * (delta_sq - dev_sq - variance - ex)) / 2.0 / subf / subf) - (x - a) / tau / tau
-    };
-
-    let initial_b = if delta_sq > dev_sq + variance {
-        (delta_sq - dev_sq - variance).ln()
-    } else {
-        (1..)
-            .map(|k| vol_fn(a - k as f64 * tau))
-            .inspect(|x| {
-                if x.is_nan() {
-                    panic!();
-                }
-            })
-            .find(|x| x >= &0.0)
-            .unwrap()
-    };
-    let vol_new = f64::exp(illinois_optimize(vol_fn, a, initial_b) / 2.0);
-
-    let dev_time = time_adjust(time as f64 / period, dev_sq, vol_new);
-    let dev_new = 1.0 / (1.0 / dev_time / dev_time + 1.0 / variance).sqrt();
-    let adjust = dev_new * dev_new * g_val * (score - exp_val);
-
-    (adjust, dev_new, vol_new)
-}
-
 // Extract set data
 
 fn get_event_sets(event: EventId, auth: &str) -> Option<Vec<SetData>> {
@@ -200,104 +119,67 @@ fn update_from_set(
     event_time: Timestamp,
     results: SetData,
 ) -> sqlite::Result<()> {
-    let players_data = results.teams;
-    // Fall back to event time if set time is not recorded
-    let time = results.time.unwrap_or(event_time);
-    add_players(connection, dataset, &players_data, time)?;
+    let teams = results.teams;
 
     // Non-singles matches are currently not supported
-    if players_data.len() != 2 || players_data[0].len() != 1 || players_data[1].len() != 1 {
+    if teams.len() != 2 || teams[0].len() != 1 || teams[1].len() != 1 {
         return Ok(());
     }
 
-    let mut it = players_data.into_iter();
-    let player1 = it.next().unwrap()[0].id;
-    let player2 = it.next().unwrap()[0].id;
-    drop(it);
+    let players = teams.into_iter().flatten().collect::<Vec<_>>();
+    add_players(connection, dataset, &players)?;
 
-    let (deviation1, volatility1, last_played1) =
-        get_player_rating_data(connection, dataset, player1)?;
-    let time1 = time.0.checked_sub(last_played1.0).unwrap_or(0);
+    let player1 = players[0].id;
+    let player2 = players[1].id;
 
-    let (deviation2, volatility2, last_played2) =
-        get_player_rating_data(connection, dataset, player1)?;
-    let time2 = time.0.checked_sub(last_played2.0).unwrap_or(0);
+    // Time-adjust all variances associated with each player
+    let time = results.time.unwrap_or(event_time);
+    adjust_for_time(connection, dataset, player1, metadata.var_const, time)?;
+    adjust_for_time(connection, dataset, player2, metadata.var_const, time)?;
 
-    let advantage = match get_advantage(connection, dataset, player1, player2) {
+    let (advantage, variance) = match get_network_data(connection, dataset, player1, player2) {
         Err(e) => Err(e)?,
         Ok(None) => initialize_edge(
             connection,
             dataset,
             player1,
             player2,
-            metadata.set_limit,
-            metadata.decay_rate,
-            metadata.adj_decay_rate,
+            metadata.decay_const,
+            time,
         )?,
         Ok(Some(adv)) => adv,
     };
-    let (adjust1, dev_new1, vol_new1) = glicko_adjust(
-        -advantage,
-        deviation1,
-        volatility1,
-        deviation2,
-        results.winner == 0,
-        time1,
-        metadata,
-    );
-    let (adjust2, dev_new2, vol_new2) = glicko_adjust(
+
+    // println!("{}, {} - {}, {}", player1.0, player2.0, advantage, variance);
+
+    glicko_adjust(
+        connection,
+        dataset,
+        &results.id,
+        player1,
+        player2,
         advantage,
-        deviation2,
-        volatility2,
-        deviation1,
-        results.winner == 1,
-        time2,
-        metadata,
-    );
+        variance,
+        results.winner,
+        metadata.decay_const,
+    )?;
 
-    // Set minimum deviation level
-    let dev_new1 = f64::max(dev_new1, 0.2);
-    let dev_new2 = f64::max(dev_new2, 0.2);
-
-    set_player_data(
+    set_player_set_counts(
         connection,
         dataset,
         player1,
-        time,
-        dev_new1,
-        vol_new1,
         results.winner == 0,
         &results.id,
     )?;
-    set_player_data(
+    set_player_set_counts(
         connection,
         dataset,
         player2,
-        time,
-        dev_new2,
-        vol_new2,
         results.winner == 1,
         &results.id,
     )?;
 
-    let (sets1, sets2) = get_matchup_set_counts(connection, dataset, player1, player2)?;
-    let decay_rate = if sets1 + sets2 >= metadata.set_limit {
-        metadata.decay_rate
-    } else {
-        metadata.adj_decay_rate
-    };
-
-    adjust_advantages(
-        connection,
-        dataset,
-        results.id,
-        player1,
-        player2,
-        results.winner,
-        adjust1,
-        adjust2,
-        decay_rate,
-    )
+    Ok(())
 }
 
 pub fn sync_dataset(
@@ -340,45 +222,3 @@ pub fn sync_dataset(
     }
     connection.execute("COMMIT;")
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::database::tests::*;
-
-    #[test]
-    fn glicko_single() -> sqlite::Result<()> {
-        let connection = mock_datasets()?;
-        new_dataset(&connection, "test", metadata())?;
-        let players = players(2).into_iter().map(|x| vec![x]).collect();
-        add_players(&connection, "test", &players, Timestamp(0))?;
-
-        update_from_set(
-            &connection,
-            "test",
-            &metadata(),
-            Timestamp(0),
-            SetData {
-                id: SetId(StringOrInt::Int(0)),
-                time: None,
-                teams: players,
-                winner: 0,
-            },
-        )?;
-
-        println!(
-            "{:?}",
-            get_advantage(&connection, "test", PlayerId(1), PlayerId(2))?.unwrap()
-        );
-        println!(
-            "{:?}",
-            get_player_rating_data(&connection, "test", PlayerId(1))
-        );
-        println!(
-            "{:?}",
-            get_player_rating_data(&connection, "test", PlayerId(2))
-        );
-
-        Ok(())
-    }
-}

src/util.rs

@@ -8,6 +8,7 @@ use crate::queries::{PlayerData, PlayerId, Timestamp};
 pub const SECS_IN_HR: u64 = 3600;
 pub const SECS_IN_DAY: u64 = SECS_IN_HR * 24;
 pub const SECS_IN_WEEK: u64 = SECS_IN_DAY * 7;
+pub const SECS_IN_YEAR: u64 = SECS_IN_DAY * 365 + SECS_IN_HR * 6;
 
 pub fn error(msg: &str, code: i32) -> ! {
     eprintln!("\nERROR: {}", msg);
@@ -41,7 +42,7 @@ pub fn read_string() -> String {
     line.trim().to_owned()
 }
 
-pub fn ansi_num_color(num: f64, threshold1: f64, threshold2: f64) -> &'static str {
+pub fn ansi_num_color(num: f64, threshold1: f64, threshold2: f64) -> (&'static str, &'static str) {
     let sign = num > 0.0;
     let num_abs = num.abs();
     let severity = if num_abs < threshold1 {
@@ -53,11 +54,11 @@ pub fn ansi_num_color(num: f64, threshold1: f64, threshold2: f64) -> &'static st
     };
 
     match (sign, severity) {
-        (false, 1) => "31",
-        (true, 1) => "32",
-        (false, 2) => "91",
-        (true, 2) => "92",
-        _ => "39",
+        (false, 1) => ("31", "32"),
+        (true, 1) => ("32", "31"),
+        (false, 2) => ("91", "92"),
+        (true, 2) => ("92", "91"),
+        _ => ("39", "39"),
     }
 }