feat: enhance GameVersion struct with optional fields for better mod loader support

1 files changed, 30 insertions, 16 deletions

diff --git a/src-tauri/src/core/game_version.rs b/src-tauri/src/core/game_version.rs
index 31477a9..c62e232 100644
--- a/src-tauri/src/core/game_version.rs
+++ b/src-tauri/src/core/game_version.rs
@@ -1,11 +1,15 @@
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 
-#[derive(Debug, Deserialize)]
+/// Represents a Minecraft version JSON, supporting both vanilla and modded (Fabric/Forge) formats.
+/// Modded versions use `inheritsFrom` to reference a parent vanilla version.
+#[derive(Debug, Deserialize, Serialize, Clone)]
 pub struct GameVersion {
     pub id: String,
-    pub downloads: Downloads,
+    /// Optional for mod loaders that inherit from vanilla
+    pub downloads: Option<Downloads>,
+    /// Optional for mod loaders that inherit from vanilla
     #[serde(rename = "assetIndex")]
-    pub asset_index: AssetIndex,
+    pub asset_index: Option<AssetIndex>,
     pub libraries: Vec<Library>,
     #[serde(rename = "mainClass")]
     pub main_class: String,
@@ -14,67 +18,77 @@ pub struct GameVersion {
     pub arguments: Option<Arguments>,
     #[serde(rename = "javaVersion")]
     pub java_version: Option<JavaVersion>,
+    /// For mod loaders: the vanilla version this inherits from
+    #[serde(rename = "inheritsFrom")]
+    pub inherits_from: Option<String>,
+    /// Fabric/Forge may specify a custom assets version
+    pub assets: Option<String>,
+    /// Release type (release, snapshot, old_beta, etc.)
+    #[serde(rename = "type")]
+    pub version_type: Option<String>,
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Serialize, Clone)]
 pub struct Downloads {
     pub client: DownloadArtifact,
     pub server: Option<DownloadArtifact>,
 }
 
-#[derive(Debug, Deserialize, Clone)]
+#[derive(Debug, Deserialize, Serialize, Clone)]
 pub struct DownloadArtifact {
-    pub sha1: String,
-    pub size: u64,
+    pub sha1: Option<String>,
+    pub size: Option<u64>,
     pub url: String,
     pub path: Option<String>,
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Serialize, Clone)]
 pub struct AssetIndex {
     pub id: String,
     pub sha1: String,
     pub size: u64,
     pub url: String,
     #[serde(rename = "totalSize")]
-    pub total_size: u64,
+    pub total_size: Option<u64>,
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Serialize, Clone)]
 pub struct Library {
     pub downloads: Option<LibraryDownloads>,
     pub name: String,
     pub rules: Option<Vec<Rule>>,
     pub natives: Option<serde_json::Value>,
+    /// Maven repository URL for mod loader libraries
+    pub url: Option<String>,
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Serialize, Clone)]
 pub struct Rule {
     pub action: String, // "allow" or "disallow"
     pub os: Option<OsRule>,
     pub features: Option<serde_json::Value>, // Feature-based rules (e.g., is_demo_user, has_quick_plays_support)
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Serialize, Clone)]
 pub struct OsRule {
     pub name: Option<String>,    // "linux", "osx", "windows"
     pub version: Option<String>, // Regex
     pub arch: Option<String>,    // "x86"
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Serialize, Clone)]
 pub struct LibraryDownloads {
     pub artifact: Option<DownloadArtifact>,
     pub classifiers: Option<serde_json::Value>, // Complex, simplifying for now
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Serialize, Clone)]
 pub struct Arguments {
     pub game: Option<serde_json::Value>,
     pub jvm: Option<serde_json::Value>,
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Serialize, Clone)]
 pub struct JavaVersion {
     pub component: String,
     #[serde(rename = "majorVersion")]