implement some persistent state (namely selected game launcher)

Cargo.lock

@@ -734,6 +734,27 @@ dependencies = [
  "crypto-common",
 ]
 
+[[package]]
+name = "dirs"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3e8aa94d75141228480295a7d0e7feb620b1a5ad9f12bc40be62411e38cce4e"
+dependencies = [
+ "dirs-sys",
+]
+
+[[package]]
+name = "dirs-sys"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e01a3366d27ee9890022452ee61b2b63a67e6f13f58900b651ff5665f0bb1fab"
+dependencies = [
+ "libc",
+ "option-ext",
+ "redox_users",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "dispatch"
 version = "0.2.0"
@@ -1348,10 +1369,13 @@ name = "gta-tools"
 version = "0.2.0"
 dependencies = [
  "catppuccin-egui",
+ "dirs",
  "eframe",
  "egui_extras",
  "image",
  "open",
+ "serde",
+ "serde_json",
  "static_vcruntime",
  "sysinfo",
  "windows 0.61.1",
@@ -1591,6 +1615,12 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
+
 [[package]]
 name = "jni"
 version = "0.21.1"
@@ -2212,6 +2242,12 @@ dependencies = [
  "pathdiff",
 ]
 
+[[package]]
+name = "option-ext"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
+
 [[package]]
 name = "orbclient"
 version = "0.3.48"
@@ -2538,6 +2574,17 @@ dependencies = [
  "bitflags 2.9.0",
 ]
 
+[[package]]
+name = "redox_users"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd6f9d3d47bdd2ad6945c5015a226ec6155d0bcdfd8f7cd29f86b71f8de99d2b"
+dependencies = [
+ "getrandom 0.2.15",
+ "libredox",
+ "thiserror 2.0.12",
+]
+
 [[package]]
 name = "renderdoc-sys"
 version = "1.1.0"
@@ -2582,6 +2629,12 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eded382c5f5f786b989652c49544c4877d9f015cc22e145a5ea8ea66c2921cd2"
 
+[[package]]
+name = "ryu"
+version = "1.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f"
+
 [[package]]
 name = "same-file"
 version = "1.0.6"
@@ -2636,6 +2689,18 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "serde_json"
+version = "1.0.140"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "20068b6e96dc6c9bd23e01df8827e6c7e1f2fddd43c21810382803c136b99373"
+dependencies = [
+ "itoa",
+ "memchr",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "serde_repr"
 version = "0.1.20"

Cargo.toml

@@ -7,10 +7,13 @@ edition = "2024"
 catppuccin-egui = { version = "5.5.0", default-features = false, features = [
     "egui31",
 ] }
+dirs = "6.0.0"
 eframe = "0.31.1"
 egui_extras = { version = "0.31.1", features = ["image"] }
 image = { version = "0.25.6", default-features = false, features = ["png"] }
 open = "5.3.2"
+serde = { version = "1.0.219", features = ["derive"] }
+serde_json = "1.0.140"
 sysinfo = "0.34.2"
 windows = { version = "0.61.1", features = [
     "Win32_UI_Input_KeyboardAndMouse",

src/features/launch.rs

@@ -1,7 +1,8 @@
+use serde::{Deserialize, Serialize};
 use std::{fmt::Display, path::PathBuf, process::Command};
 use winreg::{RegKey, enums::HKEY_LOCAL_MACHINE};
 
-#[derive(Default, Debug, PartialEq, Eq)]
+#[derive(Clone, Default, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub enum Platform {
     #[default]
     Steam,

src/gui.rs

@@ -12,11 +12,29 @@ use crate::{
     },
 };
 use eframe::egui;
-use std::time::{Duration, Instant};
+use serde::{Deserialize, Serialize};
+use std::{
+    fs::{self, File},
+    io::Write,
+    path::PathBuf,
+    sync::LazyLock,
+    time::{Duration, Instant},
+};
 use sysinfo::System;
 use windows::Win32::Foundation::HANDLE;
 
 const THEME: catppuccin_egui::Theme = catppuccin_egui::MOCHA;
+static CONFIG_PATH: LazyLock<PathBuf> = LazyLock::new(|| {
+    let mut config_path = dirs::config_local_dir().unwrap();
+    config_path.push("GTA Tools");
+    config_path.push("config.json");
+    config_path
+});
+
+#[derive(Serialize, Deserialize)]
+struct PersistentState {
+    launcher: Platform,
+}
 
 #[derive(Debug, Default, PartialEq, Eq)]
 pub enum Stage {
@@ -64,6 +82,11 @@ impl eframe::App for App {
         if !self.initialized {
             catppuccin_egui::set_theme(ctx, THEME);
             egui_extras::install_image_loaders(ctx);
+            if let Ok(config) = fs::read_to_string(CONFIG_PATH.as_path()) {
+                if let Ok(persistent_state) = serde_json::from_str::<PersistentState>(&config) {
+                    self.launch.selected = persistent_state.launcher;
+                }
+            }
             self.initialized = true;
         }
         self.run_timers();
@@ -299,6 +322,22 @@ impl App {
     }
 }
 
+impl Drop for App {
+    fn drop(&mut self) {
+        let persistent_state = PersistentState {
+            launcher: self.launch.selected.clone(),
+        };
+        let config_path = CONFIG_PATH.as_path();
+        let config_path_parent = config_path.parent().unwrap();
+        if !config_path_parent.exists() {
+            fs::create_dir(config_path_parent).unwrap();
+        }
+        let mut config_file = File::create(config_path).unwrap();
+        let json = serde_json::to_string_pretty(&persistent_state).unwrap();
+        config_file.write_all(json.as_bytes()).unwrap();
+    }
+}
+
 fn load_icon() -> eframe::egui::IconData {
     let icon = include_bytes!("../assets/icon.png");
     let image = image::load_from_memory(icon).unwrap().into_rgba8();