Start setting up app configuration

kifu/core/src/api.rs

@@ -1,6 +1,7 @@
 use crate::{
     types::{AppState, GameState, Player, Rank},
     ui::{new_game, playing_field, NewGameView, PlayingFieldView},
+    Config,
 };
 use serde::{Deserialize, Serialize};
 use std::sync::{Arc, RwLock};
@@ -64,14 +65,22 @@ pub enum CoreResponse {
 
 #[derive(Clone, Debug)]
 pub struct CoreApp {
+    config: Config,
     state: Arc<RwLock<AppState>>,
 }
 
 impl CoreApp {
     pub fn new() -> Self {
+        /* Candidate for dependency injection from the UI */
+        let user_home = std::env::var("HOME").expect("the user's home directory isn't set");
+        let mut config_path = std::path::PathBuf::from(user_home);
+        config_path.push(".config");
+        config_path.push("kifu");
+
+        let config = Config::new(config_path);
         let state = Arc::new(RwLock::new(AppState::new()));
 
-        Self { state }
+        Self { config, state }
     }
 
     pub async fn dispatch(&self, request: CoreRequest) -> CoreResponse {

kifu/core/src/config.rs

@@ -0,0 +1,91 @@
+use crate::types::Player;
+use std::{collections::HashMap, path::PathBuf};
+
+/*
+pub trait ConfigOption {
+    type Value;
+}
+
+pub struct DatabasePath(PathBuf);
+
+impl ConfigOption for DatabasePath {
+    type Value = PathBuf;
+}
+
+impl ConfigOption for Player {
+    type Value = Player;
+}
+
+pub trait Config {
+    // fn set_option(option: ConfigOption);
+    fn get_option<N, C: ConfigOption>(name: Name) -> C<Name = Name>
+}
+*/
+
+#[derive(Clone, Debug, PartialEq, Eq, Hash)]
+enum OptionNames {
+    DatabasePath,
+    Me,
+}
+
+#[derive(Clone, Debug)]
+pub enum ConfigOption {
+    DatabasePath(DatabasePath),
+    Me(Me),
+}
+
+#[derive(Clone, Debug)]
+pub struct Config {
+    config_path: PathBuf,
+    values: HashMap<OptionNames, ConfigOption>,
+}
+
+impl Config {
+    pub fn new(config_path: PathBuf) -> Self {
+        Self {
+            config_path,
+            values: HashMap::new(),
+        }
+    }
+
+    fn set(&mut self, val: ConfigOption) {
+        let _ = match val {
+            ConfigOption::DatabasePath(_) => self.values.insert(OptionNames::DatabasePath, val),
+            ConfigOption::Me(_) => self.values.insert(OptionNames::Me, val),
+        };
+    }
+
+    fn get<'a, T>(&'a self) -> T
+    where
+        T: From<&'a Self>,
+    {
+        self.into()
+    }
+}
+
+#[derive(Clone, Debug)]
+pub struct DatabasePath(PathBuf);
+
+impl From<&Config> for DatabasePath {
+    fn from(config: &Config) -> Self {
+        match config.values.get(&OptionNames::DatabasePath) {
+            Some(ConfigOption::DatabasePath(path)) => path.clone(),
+            _ => DatabasePath(config.config_path.clone()),
+        }
+    }
+}
+
+#[derive(Clone, Debug)]
+pub struct Me(Player);
+
+impl From<&Config> for Option<Me> {
+    fn from(config: &Config) -> Self {
+        config
+            .values
+            .get(&OptionNames::Me)
+            .and_then(|val| match val {
+                ConfigOption::Me(me) => Some(me.clone()),
+                _ => None,
+            })
+    }
+}

kifu/core/src/lib.rs

@@ -9,3 +9,6 @@ pub mod ui;
 
 mod board;
 pub use board::*;
+
+mod config;
+pub use config::*;

kifu/core/src/types.rs

@@ -91,7 +91,7 @@ impl From<Rank> for String {
     }
 }
 
-#[derive(Debug)]
+#[derive(Clone, Debug)]
 pub struct Player {
     pub name: String,
     pub rank: Option<Rank>,