Resolve audio not loading bug

Ensure all assets are downloading for each version

Temporarily disable minecraft versions older than 1.8 because of the asset/manifest loading issues

Implement basic documentation of modules

Implement basic async/multithreading for downloading assets

1 files changed, 150 insertions, 22 deletions

diff --git a/src/minecraft/downloads.rs b/src/minecraft/downloads.rs
index 5be5a05..a994146 100644
--- a/src/minecraft/downloads.rs
+++ b/src/minecraft/downloads.rs
@@ -1,5 +1,10 @@
 use log::{debug, info};
-use tokio::{fs, io::AsyncWriteExt};
+use reqwest::get;
+use serde::Deserialize;
+use tokio::{
+    fs::{self, File, create_dir_all},
+    io::AsyncWriteExt,
+};
 
 use crate::{
     config::Config,
@@ -8,58 +13,181 @@ use crate::{
     platform::paths,
 };
 
-/// Download everything required to launch:
+#[derive(Debug, Deserialize)]
+struct AssetObject {
+    hash: String,
+    size: u64,
+}
+
+#[derive(Debug, Deserialize)]
+struct AssetIndexManifest {
+    objects: std::collections::HashMap<String, AssetObject>,
+}
+
+/// Pobiera wszystko potrzebne do uruchomienia Minecraft:
 /// - client jar
-/// - libraries
-pub async fn download_all(config: &Config, version: &Version) -> Result<(), McError> {
+/// - biblioteki (artifact + natives)
+/// - assets (w tym textures, sounds)
+pub async fn download_all(
+    config: &Config,
+    version: &Version,
+) -> Result<(), McError> {
     download_client(config, version).await?;
     download_libraries(config, &version.libraries).await?;
+    download_assets(config, version).await?;
     Ok(())
 }
 
-async fn download_client(config: &Config, version: &Version) -> Result<(), McError> {
+async fn download_client(
+    config: &Config,
+    version: &Version,
+) -> Result<(), McError> {
     let jar_path = paths::client_jar(config, &version.id)?;
 
     if jar_path.exists() {
-        debug!("Client jar already exists");
+        debug!("Client jar already exists: {}", jar_path.display());
         return Ok(());
     }
 
     info!("Downloading client {}", version.id);
-
     download_file(&version.downloads.client.url, &jar_path).await
 }
 
-async fn download_libraries(config: &Config, libraries: &[Library]) -> Result<(), McError> {
-    for lib in libraries {
-        let Some(artifact) = &lib.downloads.artifact else {
-            continue;
-        };
+async fn download_libraries(
+    config: &Config,
+    libraries: &[Library],
+) -> Result<(), McError> {
+    for library in libraries {
+        // ===== CLASSPATH LIBRARIES =====
+        if let Some(artifact) = &library.downloads.artifact {
+            let library_path = paths::library_file(config, &artifact.path)?;
+
+            if !library_path.exists() {
+                info!("Downloading library {}", artifact.path);
+                download_file(&artifact.url, &library_path).await?;
+            }
+        }
+
+        // ===== NATIVES =====
+        if let Some(classifiers) = &library.downloads.classifiers {
+            for (_, native) in classifiers {
+                let native_path = paths::library_file(config, &native.path)?;
+
+                if native_path.exists() {
+                    continue;
+                }
+
+                info!("Downloading native library {}", native.path);
+                download_file(&native.url, &native_path).await?;
+            }
+        }
+    }
+
+    Ok(())
+}
 
-        let lib_path = paths::library_file(config, &artifact.path)?;
+async fn download_asset_index(
+    config: &Config,
+    version: &Version,
+) -> Result<AssetIndexManifest, McError> {
+    let assets_dir = paths::assets_dir(config);
+    create_dir_all(assets_dir.join("indexes")).await?;
+
+    let asset_index = version.asset_index.as_ref().ok_or_else(|| {
+        McError::Config("Missing asset_index in version.json".into())
+    })?;
+
+    // Nie pozwalamy na legacy dla nowoczesnych wersji
+    if asset_index.id == "legacy" {
+        return Err(McError::Config(
+            "Legacy assetIndex detected – pobierz właściwy version.json".into(),
+        ));
+    }
+
+    let index_path = assets_dir
+        .join("indexes")
+        .join(format!("{}.json", asset_index.id));
+
+    // Jeśli indeks istnieje lokalnie
+    if index_path.exists() {
+        let index_data = fs::read_to_string(&index_path).await?;
+        let manifest: AssetIndexManifest = serde_json::from_str(&index_data)?;
+        return Ok(manifest);
+    }
+
+    // Pobierz indeks z sieci
+    info!("Downloading asset index {}", asset_index.id);
+    let response = get(&asset_index.url).await?;
+    let manifest_text = response.text().await?;
+
+    fs::write(&index_path, &manifest_text).await?;
+
+    let manifest: AssetIndexManifest = serde_json::from_str(&manifest_text)?;
+    Ok(manifest)
+}
 
-        if lib_path.exists() {
+async fn download_assets(
+    config: &Config,
+    version: &Version,
+) -> Result<(), McError> {
+    let assets_dir = paths::assets_dir(config);
+
+    // Katalogi MUSZĄ istnieć
+    create_dir_all(assets_dir.join("objects")).await?;
+    create_dir_all(assets_dir.join("indexes")).await?;
+
+    let manifest = download_asset_index(config, version).await?;
+
+    // Pobieramy wszystkie obiekty
+    for (logical_path, asset) in &manifest.objects {
+        let subdir = &asset.hash[0..2];
+        let file_path = assets_dir
+            .join("objects")
+            .join(subdir)
+            .join(&asset.hash);
+
+        if file_path.exists() {
             continue;
         }
 
-        info!("Downloading library {}", artifact.path);
-        download_file(&artifact.url, &lib_path).await?;
+        let url = format!(
+            "https://resources.download.minecraft.net/{}/{}",
+            subdir, asset.hash
+        );
+        info!("Downloading asset {} -> {}", logical_path, file_path.display());
+        download_file(&url, &file_path).await?;
+    }
+
+    // Pobierz sounds.json jeśli istnieje
+    if let Some(asset) = manifest.objects.get("sounds.json") {
+        let file_path = assets_dir.join("indexes").join("sounds.json");
+        if !file_path.exists() {
+            let subdir = &asset.hash[0..2];
+            let url = format!(
+                "https://resources.download.minecraft.net/{}/{}",
+                subdir, asset.hash
+            );
+            info!("Downloading sounds.json");
+            download_file(&url, &file_path).await?;
+        }
     }
 
     Ok(())
 }
 
-/* ---------------- helper ---------------- */
-
-async fn download_file(url: &str, path: &std::path::Path) -> Result<(), McError> {
+/// Helper do pobierania plików
+async fn download_file(
+    url: &str,
+    path: &std::path::Path,
+) -> Result<(), McError> {
     if let Some(parent) = path.parent() {
-        fs::create_dir_all(parent).await?;
+        create_dir_all(parent).await?;
     }
 
-    let response = reqwest::get(url).await?;
+    let response = get(url).await?;
     let bytes = response.bytes().await?;
 
-    let mut file = fs::File::create(path).await?;
+    let mut file = File::create(path).await?;
     file.write_all(&bytes).await?;
 
     Ok(())