Add original database code

src/library.rs

@@ -0,0 +1,53 @@
+use crate::db::{self, SqliteConnection};
+use gtk::{glib, glib::Properties, prelude::*, subclass::prelude::*};
+use std::{
+    cell::{OnceCell, RefCell},
+    path::Path,
+};
+
+mod imp {
+    use super::*;
+
+    #[derive(Properties, Default)]
+    #[properties(wrapper_type = super::MusicusLibrary)]
+    pub struct MusicusLibrary {
+        #[property(get, set)]
+        pub folder: RefCell<String>,
+        pub connection: OnceCell<SqliteConnection>,
+    }
+
+    #[glib::object_subclass]
+    impl ObjectSubclass for MusicusLibrary {
+        const NAME: &'static str = "MusicusLibrary";
+        type Type = super::MusicusLibrary;
+    }
+
+    #[glib::derived_properties]
+    impl ObjectImpl for MusicusLibrary {}
+}
+
+glib::wrapper! {
+    pub struct MusicusLibrary(ObjectSubclass<imp::MusicusLibrary>);
+}
+
+impl MusicusLibrary {
+    pub fn new(path: impl AsRef<Path>) -> Self {
+        let path = path.as_ref();
+        let obj: MusicusLibrary = glib::Object::builder()
+            .property("folder", path.to_str().unwrap())
+            .build();
+
+        let connection = db::connect(path.join("musicus.db").to_str().unwrap()).unwrap();
+
+        obj.imp()
+            .connection
+            .set(connection)
+            .unwrap_or_else(|_| panic!("Database connection already set"));
+
+        obj
+    }
+
+    pub fn db(&self) -> &SqliteConnection {
+        self.imp().connection.get().unwrap()
+    }
+}