I think that download queuing is working

pages/store/index.vue

@@ -1,17 +1,17 @@
 <template>
   <button
     class="w-full rounded-md p-4 bg-blue-600 text-white"
-    @click="requestGameWrapper"
+    @click="queueGameWrapper"
   >
-    Load Data
+    Queue Game Download
   </button>
   <input placeholder="GAME ID" v-model="gameId" />
   <input placeholder="VERSION NAME" v-model="versionName" />
   <button
     class="w-full rounded-md p-4 bg-blue-600 text-white"
-    @click="requestGameWrapper"
+    @click="startGameDownloads"
   >
-    Download Game
+    Start Game Downloads
   </button>
 </template>
 <script setup lang="ts">
@@ -20,20 +20,31 @@ import { invoke } from "@tauri-apps/api/core";
 const gameId = ref("");
 const versionName = ref("");
 
-async function requestGame() {
-  await invoke("start_game_download", {
+async function queueGame() {
+  await invoke("queue_game_download", {
     gameId: gameId.value,
     gameVersion: versionName.value,
     maxThreads: 12,
   });
   console.log("Requested game from FE");
 }
-function requestGameWrapper() {
+function queueGameWrapper() {
   console.log("Wrapper started");
-  requestGame()
+  queueGame()
     .then(() => {})
     .catch((e) => {
       console.log(e);
     });
 }
+async function startGameDownloads() {
+  console.log("Downloading Games");
+  await invoke("start_game_downloads", { maxThreads: 4 })
+}
+function startGameDownloadsWrapper() {
+  startGameDownloads()
+    .then(() => {})
+    .catch((e) => {
+      console.log(e)
+    })
+}
 </script>

src-tauri/src/downloads/download_agent.rs

@@ -14,8 +14,8 @@ use std::sync::atomic::AtomicUsize;
 use std::sync::{Arc, Mutex};
 
 pub struct GameDownloadAgent {
-    id: String,
-    version: String,
+    pub id: String,
+    pub version: String,
     state: Mutex<GameDownloadState>,
     contexts: Mutex<Vec<DropDownloadContext>>,
     progress: ProgressChecker<DropDownloadContext>,
@@ -126,6 +126,10 @@ impl GameDownloadAgent {
         let mut lock = self.state.lock().unwrap();
         *lock = state;
     }
+    pub fn get_state(&self) -> GameDownloadState {
+        let lock = self.state.lock().unwrap();
+        lock.clone()
+    }
 
     pub fn generate_job_contexts(
         &self,
@@ -174,27 +178,3 @@ impl GameDownloadAgent {
     }
 }
 
-#[tauri::command]
-pub async fn start_game_download(
-    game_id: String,
-    game_version: String,
-    max_threads: usize,
-    state: tauri::State<'_, Mutex<AppState>>,
-) -> Result<(), GameDownloadError> {
-    info!("Triggered Game Download");
-
-    let download_agent = GameDownloadAgent::new(game_id.clone(), game_version.clone());
-
-    download_agent.ensure_manifest_exists().await?;
-
-    let local_manifest = {
-        let manifest = download_agent.manifest.lock().unwrap();
-        (*manifest).clone().unwrap()
-    };
-
-    download_agent.generate_job_contexts(&local_manifest, game_version.clone(), game_id).unwrap();
-
-    download_agent.begin_download(max_threads)?;
-
-    Ok(())
-}

src-tauri/src/downloads/download_commands.rs

@@ -0,0 +1,76 @@
+use std::sync::{Arc, Mutex};
+
+use log::info;
+
+use crate::{downloads::download_agent::GameDownloadAgent, AppState};
+
+use super::download_agent::{GameDownloadError, GameDownloadState};
+
+#[tauri::command]
+pub async fn queue_game_download(
+    game_id: String,
+    game_version: String,
+    state: tauri::State<'_, Mutex<AppState>>,
+) -> Result<(), GameDownloadError> {
+    info!("Queuing Game Download");
+    let download_agent = Arc::new(GameDownloadAgent::new(game_id.clone(), game_version.clone()));
+    download_agent.queue().await?;
+
+    let mut queue = state.lock().unwrap();
+    queue.game_downloads.insert(game_id, download_agent);
+    Ok(())
+}
+
+#[tauri::command]
+pub async fn start_game_downloads(
+    max_threads: usize,
+    state: tauri::State<'_, Mutex<AppState>>,
+) -> Result<(), GameDownloadError> {
+    info!("Downloading Games");
+    loop {
+        let mut current_id = String::new();
+        let mut download_agent = None;
+        {
+            let lock = state.lock().unwrap();
+            for (id, agent) in &lock.game_downloads {
+                if agent.get_state() == GameDownloadState::Queued {
+                    download_agent = Some(agent.clone());
+                    current_id = id.clone();
+                    info!("Got queued game to download");
+                    break;
+                }
+            }
+            if download_agent.is_none() {
+                info!("No more games left to download");
+                return Ok(())
+            }
+        };
+        info!("Downloading game");
+        start_game_download(max_threads, download_agent.unwrap()).await?;
+        {
+            let mut lock = state.lock().unwrap();
+            lock.game_downloads.remove_entry(&current_id);
+        }
+    }
+}
+
+pub async fn start_game_download(
+    max_threads: usize,
+    download_agent: Arc<GameDownloadAgent>
+) -> Result<(), GameDownloadError> {
+    info!("Triggered Game Download");
+
+
+    download_agent.ensure_manifest_exists().await?;
+
+    let local_manifest = {
+        let manifest = download_agent.manifest.lock().unwrap();
+        (*manifest).clone().unwrap()
+    };
+
+    download_agent.generate_job_contexts(&local_manifest, download_agent.version.clone(), download_agent.id.clone()).unwrap();
+
+    download_agent.begin_download(max_threads)?;
+
+    Ok(())
+}

src-tauri/src/downloads/download_logic.rs

@@ -5,33 +5,28 @@ use crate::DB;
 use gxhash::{gxhash128, GxHasher};
 use log::info;
 use md5::{Context, Digest};
-use std::{fs::{File, OpenOptions}, hash::Hasher, io::{Seek, SeekFrom, Write}, path::PathBuf};
+use std::{fs::{File, OpenOptions}, hash::Hasher, io::{self, Seek, SeekFrom, Write}, path::PathBuf};
 use urlencoding::encode;
 
 pub struct FileWriter {
     file: File,
     hasher: Context,
-    data: Vec<u8>
 }
 impl FileWriter {
     fn new(path: PathBuf) -> Self {
         Self {
             file: OpenOptions::new().write(true).open(path).unwrap(),
             hasher: Context::new(),
-            data: Vec::new()
         }
     }
-    fn finish(mut self) -> Digest {
-        self.flush();
-        let res = self.hasher.compute();
-        info!("Final calculated value hash: {:?}", hex::encode(res.0));
-        res
+    fn finish(mut self) -> io::Result<Digest> {
+        self.flush().unwrap();
+        Ok(self.hasher.compute())
     }
 }
 impl Write for FileWriter {
     fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
-        self.hasher.write(buf);
-        self.data.extend_from_slice(buf);
+        self.hasher.write_all(buf).unwrap();
         self.file.write(buf)
     }
 
@@ -82,13 +77,9 @@ pub fn download_game_chunk(ctx: DropDownloadContext) {
 
 
     response.copy_to(&mut file).unwrap();
-    let res = hex::encode(file.finish().0);
-    if res == ctx.checksum {
-        info!("Matched Checksum {}", res);
-    }
-    else {
+    let res = hex::encode(file.finish().unwrap().0);
+    if res != ctx.checksum {  
         info!("Checksum failed. Original: {}, Calculated: {} for {}", ctx.checksum, res, ctx.file_name);
-        //info!("Other Checksum: {}", hex::encode(checksum));
     }
 
     // stream.flush().unwrap();

src-tauri/src/downloads/mod.rs

@@ -2,3 +2,4 @@ mod manifest;
 pub mod progress;
 pub mod download_agent;
 mod download_logic;
+pub mod download_commands;

src-tauri/src/lib.rs

@@ -10,6 +10,7 @@ mod tests;
 
 use auth::{auth_initiate, generate_authorization_header, recieve_handshake};
 use db::{DatabaseInterface, DATA_ROOT_DIR};
+use downloads::download_commands::{queue_game_download, start_game_downloads};
 use env_logger::Env;
 use http::{header::*, response::Builder as ResponseBuilder};
 use library::{fetch_game, fetch_library, Game};
@@ -22,7 +23,7 @@ use std::{
 use std::sync::Arc;
 use tauri_plugin_deep_link::DeepLinkExt;
 use crate::db::DatabaseImpls;
-use crate::downloads::download_agent::{start_game_download, GameDownloadAgent};
+use crate::downloads::download_agent::{GameDownloadAgent};
 
 #[derive(Clone, Copy, Serialize)]
 pub enum AppStatus {
@@ -49,7 +50,7 @@ pub struct AppState {
     games: HashMap<String, Game>,
     
     #[serde(skip_serializing)]
-    game_downloads: Vec<Arc<GameDownloadAgent>>
+    game_downloads: HashMap<String, Arc<GameDownloadAgent>>
 }
 
 #[tauri::command]
@@ -69,7 +70,7 @@ fn setup() -> AppState {
             status: AppStatus::NotConfigured,
             user: None,
             games: HashMap::new(),
-            game_downloads: vec![],
+            game_downloads: HashMap::new(),
         };
     }
 
@@ -78,7 +79,7 @@ fn setup() -> AppState {
         status: auth_result.0,
         user: auth_result.1,
         games: HashMap::new(),
-        game_downloads: vec![],
+        game_downloads: HashMap::new(),
     }
 }
 
@@ -113,7 +114,8 @@ pub fn run() {
             fetch_library,
             fetch_game,
             // Downloads
-            start_game_download
+            queue_game_download,
+            start_game_downloads
         ])
         .plugin(tauri_plugin_shell::init())
         .setup(|app| {