refactor: make everything a little more modular

src/config.rs

@@ -0,0 +1,51 @@
+// std
+use std::fs::read_to_string;
+
+// toml
+use serde::Deserialize;
+
+/// General configuration Struct
+#[derive(Debug, Deserialize)]
+pub struct Config {
+    pub twitter: TwitterConfig,
+    pub mastodon: MastodonConfig,
+    pub scootaloo: ScootalooConfig,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct TwitterConfig {
+    pub username: String,
+    pub consumer_key: String,
+    pub consumer_secret: String,
+    pub access_key: String,
+    pub access_secret: String,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct MastodonConfig {
+    pub base: String,
+    pub client_id: String,
+    pub client_secret: String,
+    pub redirect: String,
+    pub token: String,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct ScootalooConfig {
+    pub db_path: String,
+    pub cache_path: String,
+}
+
+/// Parses the TOML file into a Config Struct
+pub fn parse_toml(toml_file: &str) -> Config {
+    let toml_config = read_to_string(toml_file).unwrap_or_else(|e|
+        panic!("Cannot open config file {}: {}", toml_file, e)
+    );
+
+    let config: Config = toml::from_str(&toml_config).unwrap_or_else(|e|
+        panic!("Cannot parse TOML file {}: {}", toml_file, e)
+    );
+
+    config
+}
+