refactor: make everything a little more modular

src/state.rs

@@ -0,0 +1,38 @@
+// auto-imports
+use crate::config::Config;
+
+// std
+use std::{
+    fs::{read_to_string, write},
+    error::Error,
+};
+
+// log
+use log::debug;
+
+/// Reads last tweet id from a file
+pub fn read_state(s: &str) -> Option<u64> {
+    let state = read_to_string(s);
+
+    if let Ok(s) = state {
+        debug!("Last Tweet ID (from file): {}", &s);
+        return s.parse::<u64>().ok();
+    }
+
+    None
+}
+
+/// Writes last treated tweet id to a file
+pub fn write_state(f: &str, s: u64) -> Result<(), std::io::Error> {
+    write(f, format!("{}", s))
+}
+
+/*********
+ * Main functions
+*********/
+/// Initiates the DB from path
+pub fn init_db(config: &Config) -> Result<(), Box<dyn Error>> {
+    println!("config.scootaloo.db_path: {}", config.scootaloo.db_path);
+    Ok(())
+}
+