Fixes leave on the server and reworked login flow.

gamenight-cli/src/domain/config.rs

@@ -0,0 +1,85 @@
+use std::{env, fs::{self}, path::{Path, PathBuf}};
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug)]
+pub struct ConfigError(pub String);
+
+impl From<serde_json::Error> for ConfigError {
+    fn from(value: serde_json::Error) -> Self {
+        Self(value.to_string())
+    }
+}
+
+impl From<std::io::Error> for ConfigError {
+    fn from(value: std::io::Error) -> Self {
+        Self(value.to_string())
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct Instance {
+    pub name: String,
+    pub url: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(default)]
+    pub token: Option<String>
+}
+
+impl Instance {
+    pub fn new(name: String, url: String) -> Self {
+        Self {
+            name,
+            url,
+            token: None
+        }
+    }
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Config {
+    pub instances: Vec<Instance>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(default)]
+    pub last_instance: Option<String>,
+}
+
+impl Config {
+    fn config_path() -> PathBuf {
+        let mut prefix = Path::new(&env::var("HOME").expect("HOME environment variable was not set")).join(".config");
+        if let Ok(config_home) = env::var("XDG_CONFIG_HOME") {
+            prefix = config_home.into();
+        }
+
+        prefix.join("gamenight-cli").join("config.json")
+    }
+
+    pub fn new() -> Config {
+        Config {
+            instances: vec![],
+            last_instance: None
+        }
+    }
+
+    pub fn load() -> Result<Config, ConfigError> {
+        let config_path =  Self::config_path();
+        if !fs::exists(&config_path)? {
+            let config_error = ConfigError(format!("Cannot create parent directory for config file: {}", &config_path.display()).to_string());
+            let _ = fs::create_dir_all(&config_path.parent().ok_or(config_error)?)?;
+
+            let config = Config::new();
+            fs::write(&config_path, serde_json::to_string_pretty(&config)?.as_bytes())?;
+            Ok(config)
+        }
+        else {
+            let config_string = fs::read_to_string(Self::config_path())?;
+            Ok(serde_json::from_str(&config_string)?)
+        }
+    }
+    
+    pub fn save(gamenight_configuration: &Config) -> Result<(), ConfigError> {
+        let config_path =  Self::config_path();
+        fs::write(&config_path, serde_json::to_string_pretty(gamenight_configuration)?.as_bytes())?;
+        Ok(())
+    }
+}

gamenight-cli/src/domain/gamenight.rs

@@ -13,8 +13,7 @@ pub struct Gamenight {
 
 impl Display for Gamenight {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, r#"
-Name: {}
+        write!(f, r#"Name: {}
 When: {}"#, self.name, self.start_time.format("%d-%m-%Y %H:%M"))
     }
 }

gamenight-cli/src/domain/mod.rs

@@ -1,2 +1,4 @@
 pub mod gamenight;
-pub mod user;
+pub mod user;
+pub mod config;
+pub mod participants;

gamenight-cli/src/domain/participants.rs

@@ -0,0 +1,12 @@
+use std::fmt::Display;
+
+use crate::domain::user::User;
+
+pub struct Participants<'a>(pub &'a Vec<User>);
+
+impl<'a> Display for Participants<'a> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let string_list: Vec<String> = self.0.iter().map(|x| {format!("{}", x)}).collect();
+        write!(f, "{}", string_list.join(", "))
+    }
+}