feat: config loading from config.toml

config.toml

@@ -0,0 +1,6 @@
+listen = "127.0.0.1:8123"
+data_dir = "./data"
+site_title = "ily.rs"
+site_url = "https://ily.rs"
+telegram_bot_token = "REPLACE_ME"
+telegram_chat_id = 0

src/config.rs

@@ -0,0 +1,43 @@
+use serde::Deserialize;
+use std::path::PathBuf;
+
+#[derive(Debug, Deserialize)]
+pub struct Config {
+    pub listen: String,
+    pub data_dir: PathBuf,
+    pub site_title: String,
+    pub site_url: String,
+    pub telegram_bot_token: String,
+    pub telegram_chat_id: i64,
+}
+
+impl Config {
+    pub fn load(path: &str) -> Result<Self, Box<dyn std::error::Error>> {
+        let content = std::fs::read_to_string(path)?;
+        let config: Config = toml::from_str(&content)?;
+        Ok(config)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse_config() {
+        let toml_str = r#"
+listen = "127.0.0.1:8123"
+data_dir = "/var/lib/guestbook"
+site_title = "ily.rs"
+site_url = "https://ily.rs"
+telegram_bot_token = "123:ABC"
+telegram_chat_id = 12345
+"#;
+        let config: Config = toml::from_str(toml_str).unwrap();
+        assert_eq!(config.listen, "127.0.0.1:8123");
+        assert_eq!(config.data_dir, PathBuf::from("/var/lib/guestbook"));
+        assert_eq!(config.site_title, "ily.rs");
+        assert_eq!(config.site_url, "https://ily.rs");
+        assert_eq!(config.telegram_chat_id, 12345);
+    }
+}

src/main.rs

@@ -1,3 +1,6 @@
+mod config;
+
 fn main() {
-    println!("guestbook");
+    let config = config::Config::load("config.toml").expect("failed to load config.toml");
+    println!("listening on {}", config.listen);
 }