chore(downloads): partial download manager

src-tauri/src/downloads/download_agent.rs

@@ -4,11 +4,13 @@ use crate::downloads::manifest::{DropDownloadContext, DropManifest};
 use crate::remote::RemoteAccessError;
 use crate::DB;
 use log::info;
-use rayon::ThreadPoolBuilder;
+use rayon::{spawn, ThreadPool, ThreadPoolBuilder};
 use std::fmt::{Display, Formatter};
 use std::fs::{create_dir_all, File};
 use std::path::Path;
-use std::sync::Mutex;
+use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
+use std::sync::{Arc, Mutex};
+use std::thread::Thread;
 use urlencoding::encode;
 
 #[cfg(target_os = "linux")]
@@ -207,6 +209,7 @@ impl GameDownloadAgent {
             .build()
             .unwrap();
 
+
         pool.scope(move |scope| {
             let contexts = self.contexts.lock().unwrap();
 
@@ -223,6 +226,6 @@ impl GameDownloadAgent {
                     download_game_chunk(context, control_flag, progress).unwrap();
                 });
             }
-        })
+        });
     }
 }

src-tauri/src/downloads/download_commands.rs

@@ -11,6 +11,7 @@ pub fn download_game(
     game_version: String,
     state: tauri::State<'_, Mutex<AppState>>,
 ) -> Result<(), String> {
+    /*
     info!("beginning game download...");
 
     let mut download_agent = GameDownloadAgent::new(game_id.clone(), game_version.clone(), 0);
@@ -19,7 +20,7 @@ pub fn download_game(
 
     let mut lock: std::sync::MutexGuard<'_, AppState> = state.lock().unwrap();
     let download_agent_ref = Arc::new(download_agent);
-    lock.game_downloads
+    lock.download_manager
         .insert(game_id, download_agent_ref.clone());
 
     // Run it in another thread
@@ -27,6 +28,7 @@ pub fn download_game(
         // Run doesn't require mutable
         download_agent_ref.clone().run();
     });
+    */
 
     Ok(())
 }
@@ -36,18 +38,23 @@ pub fn get_game_download_progress(
     state: tauri::State<'_, Mutex<AppState>>,
     game_id: String,
 ) -> Result<f64, String> {
+    /*
     let download_agent = use_download_agent(state, game_id)?;
 
     let progress = &download_agent.progress;
 
     Ok(progress.get_progress())
-}
+    */
 
+    Ok(0.0)
+}
+/*
 fn use_download_agent(
     state: tauri::State<'_, Mutex<AppState>>,
     game_id: String,
 ) -> Result<Arc<GameDownloadAgent>, String> {
     let lock = state.lock().unwrap();
-    let download_agent = lock.game_downloads.get(&game_id).ok_or("Invalid game ID")?;
+    let download_agent = lock.download_manager.get(&game_id).ok_or("Invalid game ID")?;
     Ok(download_agent.clone()) // Clones the Arc, not the underlying data structure
 }
+*/

src-tauri/src/downloads/download_manager.rs

@@ -0,0 +1,40 @@
+use std::{
+    collections::HashMap,
+    sync::{Arc, Mutex},
+    thread::JoinHandle,
+};
+
+use super::{download_agent::GameDownloadAgent, download_thread_control_flag::DownloadThreadControlFlag};
+
+pub struct DownloadManager {
+    download_agent_registry: HashMap<String, Arc<Mutex<GameDownloadAgent>>>,
+    download_queue: Vec<String>,
+
+    current_thread: Option<JoinHandle<()>>,
+    current_game_id: Option<String>, // Should be the only game download agent in the map with the "Go" flag
+}
+
+impl DownloadManager {
+    pub fn new() -> Self {
+        return Self {
+            download_agent_registry: HashMap::new(),
+            download_queue: Vec::new(),
+            current_thread: None,
+            current_game_id: None,
+        };
+    }
+
+    pub fn queue_game(&mut self, game_id: String, version_name: String) {
+        let existing_da = self.download_agent_registry.get(&game_id);
+
+        if let Some(da_mutex) = existing_da {
+            let da = da_mutex.lock().unwrap();
+            if da.version == version_name {
+                return; // We're already queued
+            }
+
+            da.control_flag.set(DownloadThreadControlFlag::Stop);
+            
+        }
+    }
+}

src-tauri/src/downloads/mod.rs

@@ -1,5 +1,6 @@
 pub mod download_agent;
 pub mod download_commands;
+pub mod download_manager;
 mod download_logic;
 mod download_thread_control_flag;
 mod manifest;

src-tauri/src/lib.rs

@@ -13,6 +13,7 @@ use crate::downloads::download_agent::GameDownloadAgent;
 use auth::{auth_initiate, generate_authorization_header, recieve_handshake};
 use db::{add_new_download_dir, DatabaseInterface, DATA_ROOT_DIR};
 use downloads::download_commands::*;
+use downloads::download_manager::DownloadManager;
 use env_logger::Env;
 use http::{header::*, response::Builder as ResponseBuilder};
 use library::{fetch_game, fetch_library, Game};
@@ -53,7 +54,7 @@ pub struct AppState {
     games: HashMap<String, Game>,
 
     #[serde(skip_serializing)]
-    game_downloads: HashMap<String, Arc<GameDownloadAgent>>,
+    download_manager: Arc<DownloadManager>,
 }
 
 #[tauri::command]
@@ -67,13 +68,16 @@ fn fetch_state(state: tauri::State<'_, Mutex<AppState>>) -> Result<AppState, Str
 fn setup() -> AppState {
     env_logger::Builder::from_env(Env::default().default_filter_or("info")).init();
 
+    let games = HashMap::new();
+    let download_manager = Arc::new(DownloadManager::new());
+
     let is_set_up = DB.database_is_set_up();
     if !is_set_up {
         return AppState {
             status: AppStatus::NotConfigured,
             user: None,
-            games: HashMap::new(),
-            game_downloads: HashMap::new(),
+            games,
+            download_manager,
         };
     }
 
@@ -81,8 +85,8 @@ fn setup() -> AppState {
     AppState {
         status: app_status,
         user,
-        games: HashMap::new(),
-        game_downloads: HashMap::new(),
+        games,
+        download_manager,
     }
 }