some bare minimum trait work for songs

src/rust/core/model.rs

@@ -0,0 +1,37 @@
+use color_eyre::eyre::Result;
+use sqlx::{Connection, SqliteConnection};
+
+use crate::songs::Song;
+
+#[derive(Debug)]
+pub struct Model<T> {
+    pub items: Vec<T>,
+    pub db: SqliteConnection,
+}
+
+pub trait Models {
+    type Item;
+
+    fn setup_db() -> SqliteConnection {
+        let rt = tokio::runtime::Runtime::new().unwrap();
+        let mut data = dirs::data_local_dir().unwrap();
+        data.push("lumina");
+        data.push("library-db.sqlite3");
+        let mut db_url = String::from("sqlite://");
+        db_url.push_str(data.to_str().unwrap());
+        rt.block_on(async {
+            SqliteConnection::connect(&db_url).await.expect("problems")
+        })
+    }
+
+    fn add_item(&mut self, item: Self::Item) -> Result<()>;
+    fn add_to_db(&mut self, item: Self::Item) -> Result<()>;
+    fn update_item(&mut self, item: Self::Item, index: i32) -> Result<()>;
+    fn remove_item(&mut self, index: i32) -> Result<()>;
+    fn get_item(&self, index: i32) -> Option<&Self::Item>;
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+}