project restructure with Rust workspaces

crates/jarvis-core/src/db.rs

@@ -0,0 +1,58 @@
+pub mod structs;
+use crate::{config, APP_CONFIG_DIR};
+
+use log::info;
+use std::fs::File;
+use std::io::{BufReader, Read};
+use std::path::PathBuf;
+
+use serde_json;
+
+fn get_db_file_path() -> PathBuf {
+    PathBuf::from(format!(
+        "{}/{}",
+        APP_CONFIG_DIR.get().unwrap().display(),
+        config::DB_FILE_NAME
+    ))
+}
+
+pub fn init_settings() -> structs::Settings {
+    let mut db = None;
+    let db_file_path = get_db_file_path();
+
+    info!(
+        "Loading settings db file located at: {}",
+        db_file_path.display()
+    );
+
+    if db_file_path.exists() {
+        // try load existing settings
+        if let Ok(mut db_file) = File::open(db_file_path) {
+            let reader = BufReader::new(db_file);
+            if let Ok(parsed_json) = serde_json::from_reader(reader) {
+                info!("Settings loaded.");
+                db = Some(parsed_json);
+            }
+        }
+    }
+
+    if db.is_none() {
+        // create default settings db file
+        warn!("No settings file found or there was an error parsing it. Creating default struct.");
+        db = Some(structs::Settings::default());
+    }
+
+    db.unwrap()
+}
+
+pub fn save_settings(settings: &structs::Settings) -> Result<(), std::io::Error> {
+    let db_file_path = get_db_file_path();
+
+    std::fs::write(
+        db_file_path,
+        serde_json::to_string_pretty(&settings).unwrap(),
+    )?;
+
+    info!("Settings saved.");
+    Ok(())
+}