.env pwd configuration to ini xdg configuration

src/config.rs

@@ -1,19 +1,55 @@
-use envconfig::Envconfig;
+use anyhow::{Context, Result};
+use serde::Deserialize;
+use std::fs;
+use std::fs::{create_dir_all, OpenOptions};
+use std::io::Write;
+use std::process;
+use tracing::info;
 
-#[derive(Envconfig)]
+#[derive(Deserialize)]
 pub struct Config {
-    #[envconfig(from = "PLAYER_BUS")]
     pub player_bus: Option<String>,
-
-    #[envconfig(from = "USERNAME")]
     pub username: String,
-
-    #[envconfig(from = "PASSWORD")]
     pub password: String,
-
-    #[envconfig(from = "API_KEY")]
     pub api_key: String,
-
-    #[envconfig(from = "API_SECRET")]
     pub api_secret: String
+}
+
+pub fn load_config() -> Result<Config> {
+    let path = dirs::config_dir()
+        .context("failed to get config directory")?
+        .join("lastfmpris")
+        .join("config.ini");
+
+    // create file if it doesnt exist and exit
+    if !path.exists() {
+        info!("configuration file doesn't exist, creating boilerplate");
+
+        // create underline paths and files
+        if let Some(parent) = path.parent() {
+            create_dir_all(parent)
+                .context("failed to create config file folder(s)")?;
+        }
+        let mut file = OpenOptions::new()
+            .write(true)
+            .create(true)
+            .open(&path)
+            .context("failed to create config file")?;
+
+        // write into the config file with the example configuration 
+        // we put inside the base working directory for the project
+        file.write_all(include_str!("../config.example.ini").as_bytes())
+            .context("failed to write boilerplate config")?;
+
+        info!("configuration boilerplate generation completed: see file: {}", path.display());
+        // success, exit
+        process::exit(0)
+    }
+
+    let content = fs::read_to_string(path)
+        .context("failed to read config content")?;
+    let config: Config = serde_ini::from_str(&content)
+        .context("failed to deserialize ini into a readable format")?;
+
+    Ok(config)
 }