Process manager templating & game importing (#96)

* feat: add new template options, asahi support, and refactoring

* feat: install dir scanning, validation fixes, progress fixes, download manager refactor

This kind of ballooned out of scope, but I implemented some much
needed fixes for the download manager.

First off, I cleanup the Downloadable trait, there was some
duplication of function.

Second, I refactored the "validate" into the GameDownloadAgent,
which calls a 'validate_chunk_logic' yada, same structure as
downloading.

Third, I fixed the progress and validation issues.

Fourth, I added game scanning

* feat: out of box support for Asahi Linux

* fix: clippy

* fix: don't break database

desktop/src-tauri/src/database/db.rs

@@ -10,7 +10,7 @@ use chrono::Utc;
 use log::{debug, error, info, warn};
 use native_model::{Decode, Encode};
 use rustbreak::{DeSerError, DeSerializer, PathDatabase, RustbreakError};
-use serde::{de::DeserializeOwned, Serialize};
+use serde::{Serialize, de::DeserializeOwned};
 use url::Url;
 
 use crate::DB;
@@ -67,17 +67,18 @@ impl DatabaseImpls for DatabaseInterface {
 
         let exists = fs::exists(db_path.clone()).unwrap();
 
-        if exists { match PathDatabase::load_from_path(db_path.clone()) {
-            Ok(db) => db,
-            Err(e) => handle_invalid_database(e, db_path, games_base_dir, cache_dir),
-        } } else {
+        if exists {
+            match PathDatabase::load_from_path(db_path.clone()) {
+                Ok(db) => db,
+                Err(e) => handle_invalid_database(e, db_path, games_base_dir, cache_dir),
+            }
+        } else {
             let default = Database::new(games_base_dir, None, cache_dir);
             debug!(
                 "Creating database at path {}",
                 db_path.as_os_str().to_str().unwrap()
             );
-            PathDatabase::create_at_path(db_path, default)
-                .expect("Database could not be created")
+            PathDatabase::create_at_path(db_path, default).expect("Database could not be created")
         }
     }
 
@@ -121,24 +122,24 @@ fn handle_invalid_database(
 pub struct DBRead<'a>(RwLockReadGuard<'a, Database>);
 pub struct DBWrite<'a>(ManuallyDrop<RwLockWriteGuard<'a, Database>>);
 impl<'a> Deref for DBWrite<'a> {
-    type Target = RwLockWriteGuard<'a, Database>;
+    type Target = Database;
 
     fn deref(&self) -> &Self::Target {
         &self.0
     }
 }
+impl<'a> DerefMut for DBWrite<'a> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
 impl<'a> Deref for DBRead<'a> {
-    type Target = RwLockReadGuard<'a, Database>;
+    type Target = Database;
 
     fn deref(&self) -> &Self::Target {
         &self.0
     }
 }
-impl DerefMut for DBWrite<'_> {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.0
-    }
-}
 impl Drop for DBWrite<'_> {
     fn drop(&mut self) {
         unsafe {
@@ -154,6 +155,7 @@ impl Drop for DBWrite<'_> {
         }
     }
 }
+
 pub fn borrow_db_checked<'a>() -> DBRead<'a> {
     match DB.borrow_data() {
         Ok(data) => DBRead(data),